WO2024214920A2 - 음향을 출력하는 전자 장치 및 이를 이용한 음향 출력 방법 - Google Patents
음향을 출력하는 전자 장치 및 이를 이용한 음향 출력 방법 Download PDFInfo
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- WO2024214920A2 WO2024214920A2 PCT/KR2024/000370 KR2024000370W WO2024214920A2 WO 2024214920 A2 WO2024214920 A2 WO 2024214920A2 KR 2024000370 W KR2024000370 W KR 2024000370W WO 2024214920 A2 WO2024214920 A2 WO 2024214920A2
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G5/00—Tone control or bandwidth control in amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
- H03G7/007—Volume compression or expansion in amplifiers of digital or coded signals
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/66—Digital/analogue converters
- H03M1/72—Sequential conversion in series-connected stages
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers
- H04R3/12—Circuits for transducers for distributing signals to two or more loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/372—Noise reduction and elimination in amplifier
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
- H04R2430/01—Aspects of volume control, not necessarily automatic, in sound systems
Definitions
- Various embodiments of the present disclosure relate to an electronic device for outputting sound and a sound output method using the same.
- audio source devices such as mobile communication terminals, personal digital assistants (PDAs), electronic notebooks, smartphones, tablets, personal computers (PCs), or wearable devices.
- PDAs personal digital assistants
- PCs personal computers
- wearable devices can receive audio data from audio source devices through wireless communication connections with the audio source devices.
- the Bluetooth standard technology defines a protocol for short-range wireless communication between electronic devices.
- electronic devices can transmit or receive data packets containing content such as text, voice, images, or videos in a designated frequency band.
- a user equipment such as a smartphone, a tablet, a desktop computer, or a laptop computer can transmit data packets to another user equipment or an accessory device.
- Electronic devices e.g., a pair of wireless earphones, a wireless speaker
- a pair of wireless earphones, a wireless speaker can each create an independent communication link (e.g., AoBLE (audio over Bluetooth low energy) topology) with a user terminal (e.g., a smartphone) and provide the same purpose and the same service.
- AoBLE audio over Bluetooth low energy
- Matching or coupling can be performed between the electronic devices so that the electronic devices provide the same purpose and the same service.
- Various embodiments of the present disclosure can provide an electronic device that performs dynamic range enhancement (DRE) on an input audio signal, boosts the input audio signal, and removes noise generated during audio processing.
- DRE dynamic range enhancement
- An electronic device for outputting sound includes a memory for storing at least one command, a processor for executing the at least one command, at least one speaker, and an audio processing module for processing an input audio signal and outputting the input audio signal to the at least one speaker.
- the audio processing module includes a digital amplifier for amplifying a digital audio signal, a DAC for converting the digital audio signal into an analog audio signal, an analog amplifier for amplifying the analog audio signal, a boost amplifier for boosting the analog audio signal above a reference high voltage, and at least one noise gate for removing noise included in the analog audio signal.
- the digital amplifier applies a positive (+) digital gain to the digital audio signal.
- the analog amplifier applies a negative (-) analog gain to the analog audio signal.
- an audio processing module for processing an input audio signal according to embodiments of the present disclosure and outputting the same to at least one speaker includes a digital amplifier for amplifying a digital audio signal, a DAC for converting the digital audio signal into an analog audio signal, an analog amplifier for amplifying the analog audio signal, a boost amplifier for boosting the analog audio signal above a reference high voltage, and at least one noise gate for removing noise included in the analog audio signal.
- the digital amplifier applies a positive (+) digital gain to the digital audio signal.
- the analog amplifier applies a negative (-) analog gain to the analog audio signal.
- the sound output method includes an operation of amplifying a digital audio signal, an operation of converting the digital audio signal into an analog audio signal, an operation of amplifying the analog audio signal, an operation of boosting the analog audio signal above a reference high voltage, an operation of removing noise included in the analog audio signal, and an operation of outputting the analog audio signal to at least one speaker.
- the operation of amplifying the digital audio signal applies a positive (+) digital gain to the digital audio signal.
- the operation of amplifying the analog audio signal applies a negative (-) analog gain to the analog audio signal.
- an electronic device for outputting sound of the present disclosure and a method for outputting sound using the same perform DRE (dynamic range enhancement) on an input audio signal and remove noise occurring in an audio processing process using a noise gate, thereby implementing high-resolution sound with minimized noise.
- DRE dynamic range enhancement
- the electronic device for outputting sound of the present disclosure and the sound output method using the same can drive a piezo speaker requiring high voltage output by boosting an input audio signal above a reference high voltage.
- the effects obtainable from the exemplary embodiments of the present disclosure are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood by a person having ordinary skill in the art to which the exemplary embodiments of the present disclosure belong from the following description. That is, unintended effects resulting from practicing the exemplary embodiments of the present disclosure can also be derived by a person having ordinary skill in the art from the exemplary embodiments of the present disclosure.
- FIG. 1 illustrates a block configuration of an electronic device within a network environment according to one embodiment.
- Figure 2 illustrates a block configuration of an audio module according to one embodiment.
- FIG. 3 illustrates a block diagram of an electronic device for processing audio signals to output sound from a speaker according to one embodiment.
- FIG. 4 illustrates a block configuration of an audio processing module according to one embodiment.
- FIG. 5 illustrates a block configuration of an audio processing module according to one embodiment.
- Figure 6 illustrates a block configuration of an audio processing module according to one embodiment.
- Figure 7 illustrates a block configuration of an audio processing module according to one embodiment.
- Figure 8 illustrates a block configuration of an audio processing module according to one embodiment.
- Figure 9 illustrates a block configuration of an audio processing module according to one embodiment.
- Figure 10 illustrates a block configuration of an audio processing module according to one embodiment.
- Fig. 11 illustrates a sound output method using an electronic device according to one embodiment.
- FIG. 12a illustrates a block configuration of a wearable electronic device according to one embodiment.
- FIG. 12b illustrates an external configuration of a wearable electronic device according to one embodiment.
- FIG. 12c illustrates the internal configuration of a wearable electronic device according to one embodiment.
- FIG. 13 illustrates a wearable device electrically connected to an electronic device according to one embodiment.
- FIG. 1 illustrates a block configuration of an electronic device (101) within a network environment (100) according to one embodiment.
- an electronic device (101) may communicate with an electronic device (102) via a first network (198) (e.g., a short-range wireless communication network), or may communicate with at least one of an electronic device (104) or a server (108) via a second network (199) (e.g., a long-range wireless communication network).
- the electronic device (101) may communicate with the electronic device (104) via the server (108).
- the electronic device (101) may include a processor (120), a memory (130), an input module (150), an audio output module (155), a display module (160), an audio module (170), a sensor module (176), an interface (177), a connection terminal (178), a haptic module (179), a camera module (180), a power management module (188), a battery (189), a communication module (190), a subscriber identification module (196), or an antenna module (197).
- the electronic device (101) may omit at least one of these components (e.g., the connection terminal (178)), or may have one or more other components added.
- some of these components e.g., the sensor module (176), the camera module (180), or the antenna module (197) may be integrated into one component (e.g., the display module (160)).
- the processor (120) may control at least one other component (e.g., a hardware or software component) of the electronic device (101) connected to the processor (120) by executing, for example, software (e.g., a program (140)), and may perform various data processing or calculations. According to one embodiment, as at least a part of the data processing or calculations, the processor (120) may store a command or data received from another component (e.g., a sensor module (176) or a communication module (190)) in the volatile memory (132), process the command or data stored in the volatile memory (132), and store result data in the nonvolatile memory (134).
- a command or data received from another component e.g., a sensor module (176) or a communication module (190)
- the processor (120) may include a main processor (121) (e.g., a central processing unit or an application processor) or an auxiliary processor (123) (e.g., a graphic processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor) that can operate independently or together therewith.
- a main processor (121) e.g., a central processing unit or an application processor
- an auxiliary processor (123) e.g., a graphic processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor
- the secondary processor (123) may be configured to use lower power than the main processor (121) or to be specialized for a given function.
- the secondary processor (123) may be implemented separately from the main processor (121) or as a part thereof.
- the auxiliary processor (123) may control at least a portion of functions or states associated with at least one of the components of the electronic device (101) (e.g., the display module (160), the sensor module (176), or the communication module (190)), for example, on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state.
- the auxiliary processor (123) e.g., an image signal processor or a communication processor
- the auxiliary processor (123) may include a hardware structure specialized for processing artificial intelligence models.
- the artificial intelligence models may be generated through machine learning. Such learning may be performed, for example, in the electronic device (101) itself on which the artificial intelligence model is executed, or may be performed through a separate server (e.g., server (108)).
- the learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above.
- the artificial intelligence model may include a plurality of artificial neural network layers.
- the artificial neural network may be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), deep Q-networks, or a combination of two or more of the above, but is not limited to the examples described above.
- the artificial intelligence model may additionally or alternatively include a software structure.
- the memory (130) can store various data used by at least one component (e.g., processor (120) or sensor module (176)) of the electronic device (101).
- the data can include, for example, software (e.g., program (140)) and input data or output data for commands related thereto.
- the memory (130) can include volatile memory (132) or nonvolatile memory (134).
- the program (140) may be stored as software in the memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).
- the input module (150) can receive commands or data to be used in a component of the electronic device (101) (e.g., a processor (120)) from an external source (e.g., a user) of the electronic device (101).
- the input module (150) can include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).
- the audio output module (155) can output an audio signal to the outside of the electronic device (101).
- the audio output module (155) can include, for example, a speaker or a receiver.
- the speaker can be used for general purposes such as multimedia playback or recording playback.
- the receiver can be used to receive an incoming call. According to one embodiment, the receiver can be implemented separately from the speaker or as a part thereof.
- the display module (160) can visually provide information to an external party (e.g., a user) of the electronic device (101).
- the display module (160) can include, for example, a display, a holographic device, or a projector and a control circuit for controlling the device.
- the display module (160) can include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of a force generated by the touch.
- the audio module (170) can convert sound into an electrical signal, or vice versa, convert an electrical signal into sound. According to one embodiment, the audio module (170) can obtain sound through an input module (150), or output sound through an audio output module (155), or an external electronic device (e.g., an electronic device (102)) (e.g., a speaker or a headphone) directly or wirelessly connected to the electronic device (101).
- an electronic device e.g., an electronic device (102)
- a speaker or a headphone directly or wirelessly connected to the electronic device (101).
- the sensor module (176) can detect an operating state (e.g., power or temperature) of the electronic device (101) or an external environmental state (e.g., user state) and generate an electric signal or data value corresponding to the detected state.
- the sensor module (176) can include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.
- the interface (177) may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device (101) with an external electronic device (e.g., the electronic device (102)).
- the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.
- HDMI high definition multimedia interface
- USB universal serial bus
- SD card interface Secure Digital Card
- connection terminal (178) may include a connector through which the electronic device (101) may be physically connected to an external electronic device (e.g., the electronic device (102)).
- the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).
- the haptic module (179) can convert an electrical signal into a mechanical stimulus (e.g., vibration or movement) or an electrical stimulus that a user can perceive through a tactile or kinesthetic sense.
- the haptic module (179) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device.
- the camera module (180) can capture still images and moving images.
- the camera module (180) can include one or more lenses, image sensors, image signal processors, or flashes.
- the power management module (188) can manage power supplied to the electronic device (101).
- the power management module (188) can be implemented as, for example, at least a part of a power management integrated circuit (PMIC).
- PMIC power management integrated circuit
- the battery (189) can power at least one component of the electronic device (101).
- the battery (189) can include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.
- the communication module (190) may support establishment of a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device (101) and an external electronic device (e.g., the electronic device (102), the electronic device (104), or the server (108)), and performance of communication through the established communication channel.
- the communication module (190) may operate independently from the processor (120) (e.g., the application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication.
- the communication module (190) may include a wireless communication module (192) (e.g., a cellular communication module, a short-range wireless communication module, or a GNSS (global navigation satellite system) communication module) or a wired communication module (194) (e.g., a local area network (LAN) communication module or a power line communication module).
- a wireless communication module (192) e.g., a cellular communication module, a short-range wireless communication module, or a GNSS (global navigation satellite system) communication module
- a wired communication module (194) e.g., a local area network (LAN) communication module or a power line communication module.
- a corresponding communication module may communicate with an external electronic device (104) via a first network (198) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (199) (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)).
- a first network (198) e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)
- a second network (199) e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)
- a computer network e.g.,
- the wireless communication module (192) may use subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in the subscriber identification module (196) to identify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199).
- subscriber information e.g., an international mobile subscriber identity (IMSI)
- IMSI international mobile subscriber identity
- the wireless communication module (192) can support a 5G network and next-generation communication technology after a 4G network, for example, NR access technology (new radio access technology).
- the NR access technology can support high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), terminal power minimization and connection of multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low-latency communications)).
- eMBB enhanced mobile broadband
- mMTC massive machine type communications
- URLLC ultra-reliable and low-latency communications
- the wireless communication module (192) can support, for example, a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate.
- a high-frequency band e.g., mmWave band
- the wireless communication module (192) may support various technologies for securing performance in a high-frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna.
- the wireless communication module (192) may support various requirements specified in an electronic device (101), an external electronic device (e.g., an electronic device (104)), or a network system (e.g., a second network (199)).
- the wireless communication module (192) may support a peak data rate (e.g., 20 Gbps or more) for eMBB realization, a loss coverage (e.g., 164 dB or less) for mMTC realization, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL) each, or 1 ms or less for round trip) for URLLC realization.
- a peak data rate e.g., 20 Gbps or more
- a loss coverage e.g., 164 dB or less
- U-plane latency e.g., 0.5 ms or less for downlink (DL) and uplink (UL) each, or 1 ms or less for round trip
- the antenna module (197) can transmit or receive signals or power to or from the outside (e.g., an external electronic device).
- the antenna module (197) can include an antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (e.g., a PCB).
- the antenna module (197) can include a plurality of antennas (e.g., an array antenna).
- at least one antenna suitable for a communication method used in a communication network, such as the first network (198) or the second network (199) can be selected from the plurality of antennas by, for example, the communication module (190).
- a signal or power can be transmitted or received between the communication module (190) and the external electronic device through the selected at least one antenna.
- another component e.g., a radio frequency integrated circuit (RFIC)
- RFIC radio frequency integrated circuit
- the antenna module (197) may form a mmWave antenna module.
- the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent a first side (e.g., a bottom side) of the printed circuit board and capable of supporting a designated high-frequency band (e.g., a mmWave band), and a plurality of antennas (e.g., an array antenna) disposed on or adjacent a second side (e.g., a top side or a side) of the printed circuit board and capable of transmitting or receiving signals in the designated high-frequency band.
- a first side e.g., a bottom side
- a plurality of antennas e.g., an array antenna
- At least some of the above components may be interconnected and exchange signals (e.g., commands or data) with each other via a communication method between peripheral devices (e.g., a bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)).
- peripheral devices e.g., a bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)).
- commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) via a server (108) connected to a second network (199).
- Each of the external electronic devices (102 or 104) may be the same or a different type of device as the electronic device (101).
- all or part of the operations executed in the electronic device (101) may be executed in one or more of the external electronic devices (102, 104, or 108). For example, when the electronic device (101) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (101) may, instead of or in addition to executing the function or service itself, request one or more external electronic devices to perform at least a part of the function or service.
- One or more external electronic devices that have received the request may execute at least a part of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device (101).
- the electronic device (101) may process the result as is or additionally and provide it as at least a part of a response to the request.
- cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used.
- the electronic device (101) may provide an ultra-low latency service by using, for example, distributed computing or mobile edge computing.
- the external electronic device (104) may include an IoT (Internet of Things) device.
- the server (108) may be an intelligent server using machine learning and/or a neural network.
- the external electronic device (104) or the server (108) may be included in the second network (199).
- the electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.
- Figure 2 illustrates a block configuration of an audio module (170) according to one embodiment.
- the audio module (170) may include, for example, an audio input interface (210), an audio input mixer (220), an analog to digital converter (ADC) (230), an audio signal processor (240), a digital to analog converter (DAC) (250), an audio output mixer (260), or an audio output interface (270).
- ADC analog to digital converter
- DAC digital to analog converter
- 260 an audio output mixer
- 270 an audio output interface
- the audio input interface (210) can receive an audio signal corresponding to a sound acquired from the outside of the electronic device (101) as part of the input module (150) or through a microphone (e.g., a dynamic microphone, a condenser microphone, or a piezo microphone) configured separately from the electronic device (101).
- a microphone e.g., a dynamic microphone, a condenser microphone, or a piezo microphone
- the audio input interface (210) can be directly connected to the external electronic device (102) through a connection terminal (178) or wirelessly (e.g., Bluetooth communication) through a wireless communication module (192) to receive the audio signal.
- the audio input interface (210) can receive a control signal (e.g., a volume control signal received through an input button) related to the audio signal acquired from the external electronic device (102).
- the audio input interface (210) includes a plurality of audio input channels, and can receive different audio signals for each corresponding audio input channel among the plurality of audio input channels.
- the audio input interface (210) can receive audio signals from other components of the electronic device (101), such as the processor (120) or the memory (130).
- the audio input mixer (220) can synthesize a plurality of input audio signals into at least one audio signal.
- the audio input mixer (220) can synthesize a plurality of analog audio signals input through the audio input interface (210) into at least one analog audio signal.
- the ADC (230) can convert an analog audio signal into a digital audio signal.
- the ADC (230) can convert an analog audio signal received through an audio input interface (210), or additionally or alternatively, an analog audio signal synthesized through an audio input mixer (220), into a digital audio signal.
- the audio signal processor (240) may perform various processing on a digital audio signal input through the ADC (230) or a digital audio signal received from another component of the electronic device (101). For example, according to one embodiment, the audio signal processor (240) may change a sampling rate, apply one or more filters, perform interpolation processing, amplify or attenuate all or part of a frequency band, process noise (e.g., noise or echo attenuation), change channels (e.g., switching between mono and stereo), mix, or extract a specified signal on one or more digital audio signals. According to one embodiment, one or more functions of the audio signal processor (240) may be implemented in the form of an equalizer.
- the DAC (250) can convert a digital audio signal into an analog audio signal.
- the DAC (250) can convert a digital audio signal processed by an audio signal processor (240) or a digital audio signal obtained from another component of the electronic device (101) (e.g., a processor (120) or a memory (130)) into an analog audio signal.
- the audio output mixer (260) can synthesize a plurality of audio signals to be output into at least one audio signal.
- the audio output mixer (260) can synthesize an audio signal converted into analog through the DAC (250) and another analog audio signal (e.g., an analog audio signal received through the audio input interface (210)) into at least one analog audio signal.
- the audio output interface (270) can output an analog audio signal converted by the DAC (250), or additionally or alternatively, an analog audio signal synthesized by the audio output mixer (260), to the outside of the electronic device (101) through the audio output module (155).
- the audio output module (155) can include, for example, a speaker, such as a dynamic driver or a balanced armature driver, or a receiver.
- the audio output module (155) can include a plurality of speakers.
- the audio output interface (270) can output an audio signal having different channels (e.g., stereo or 5.1 channels) through at least some of the speakers among the plurality of speakers.
- the audio output interface (270) can be directly connected to an external electronic device (102) (e.g., an external speaker or a headset) through a connection terminal (178) or wirelessly through a wireless communication module (192) to output an audio signal.
- the audio module (170) can generate at least one digital audio signal by synthesizing a plurality of digital audio signals using at least one function of the audio signal processor (240) without separately providing an audio input mixer (220) or an audio output mixer (260).
- the audio module (170) may include an audio amplifier (not shown) (e.g., a speaker amplifier circuit) capable of amplifying an analog audio signal input through the audio input interface (210) or an audio signal to be output through the audio output interface (270).
- the audio amplifier may be configured as a separate module from the audio module (170).
- FIG. 3 illustrates a block configuration of an electronic device (300) that processes an audio signal to output sound from a speaker according to one embodiment.
- An electronic device (300) may include an audio receiving module (310), a communication module (320), a codec (330), an audio processing module (340), a speaker (350), a sensor (360), a memory (388), and a processor (399).
- the above components of the electronic device (300) may be operatively or electrically connected to each other.
- the audio receiving module (310) can receive an audio file from an audio source.
- the audio receiving module (310) can receive an audio file automatically or manually selected by a user or a server as audio to be played back (e.g., streaming playback) from an external audio source (e.g., a streaming media server) via a communication module (320) (e.g., a wireless communication module (192) of FIG. 1), and store the audio file in a buffer (e.g., memory (388)).
- the audio receiving module (310) can load an audio file selected by a user as audio to be played back from among audio files stored in an internal audio source (e.g., memory (388)).
- the codec (330) can decode an audio file received from the audio receiving module (310) into a digital audio signal.
- the codec (330) can decompress an audio file compressed in a lossy compression format, such as MP3 or AAC (advanced audio coding), into a playable digital audio signal.
- the codec (330) can decompress an audio file compressed in a lossless compression format, such as TTA (the true audio) or FLAC (free lossless audio codec), into a digital audio signal.
- TTA true audio
- FLAC free lossless audio codec
- the audio processing module (340) can check the format of the audio file.
- the audio processing module (340) can check the format information that constitutes a digital audio signal (e.g., digital data) in the audio file (e.g., header) obtained from the codec (330).
- the audio processing module (340) can check at least one of a bit rate, a sampling rate, a bit depth, and a number of channels.
- the bit rate is defined as the number of bits processed per unit time (e.g., 1 second), and the unit may be bps (bit per second). The higher the bit rate, the higher the quality (e.g., fidelity) of the corresponding audio file can be understood.
- the sampling rate may be defined as the number of samples extracted from the original sound per unit time (e.g., 1 second), and the unit may be hertz (Hz).
- Hz hertz
- an audio file with a sampling rate of 48 kHz can be understood as an audio file included in multimedia, not music.
- the bit depth corresponds to the resolution of an image, and can be an indicator of how precisely the amplitude of an audio signal can be expressed, and its unit can be bit. The larger the bit depth, the higher the resolution of the corresponding audio file can be understood.
- the number of channels can be, for example, at least one of 1 (mono), 2 (stereo), 5.1, and 7.1.
- the audio processing module (340) can process a digital audio signal (e.g., digital data) based on format information. For example, the audio processing module (340) estimates the type (or purpose) (e.g., music, multimedia, voice, high-resolution, or surround sound) of the corresponding audio file using the format information, and processes the digital audio signal using a processing method based on the type, thereby providing a sound field effect expected by the user when playing the audio.
- the type or purpose
- the processing method may include at least one of an operation of adjusting the pitch (frequency), volume, or tone of an audio signal, an operation of amplifying (or attenuating) an audio component of a specific frequency band in an audio signal, an operation of synthesizing a sound effect (e.g., echo) into an audio signal, an operation of removing noise from an audio signal, an operation of gradually increasing (or decreasing) a sound, and an operation of decreasing a small sound in an audio signal and increasing a large sound.
- the processing method may include various processing methods in addition to the above operations.
- the audio processing module (340) can configure a processing method based on the type of audio file by using at least one of the above operations, and apply the processing method based on the type of audio file to the processing of digital data.
- the audio processing module (340) may process a digital audio signal based on the bit depth. For example, if the bit depth is equal to or greater than a specified value (e.g., 24 bits), the audio processing module (340) may regard the audio file as an audio file having high resolution, and may apply a processing method to the audio signal received from the codec (330) to emphasize the characteristics of high resolution and minimize distortion so that the audio is played back close to the original sound.
- a specified value e.g. 24 bits
- the audio processing module (340) may emphasize (e.g., amplify) audio components belonging to a frequency band higher than a specified first frequency (e.g., approximately 16 kHz) and audio components belonging to a frequency band lower than a specified second frequency (e.g., approximately 40 Hz) in the audio signal.
- a specified first frequency e.g., approximately 16 kHz
- a specified second frequency e.g., approximately 40 Hz
- the speaker (350) may be connected to the electronic device (300) via an audio connector or a communication module (320).
- the electronic device (300) may receive specifications regarding the performance of the speaker (350) (e.g., reproducible frequency band, sound pressure level, recommended amplifier output, or impedance) from the speaker (350) via the audio connector or the communication module (320). Based on the received information regarding the performance, the electronic device (300) may determine that the speaker (350) is a device having performance higher than a specified standard. Based on this determination, the audio processing module (340) may output an audio signal to the speaker (350) without the above-described emphasis processing.
- specifications regarding the performance of the speaker (350) e.g., reproducible frequency band, sound pressure level, recommended amplifier output, or impedance
- the audio processing module (340) can process digital data based on the number of channels. For example, when the number of channels is one, the audio processing module (340) may regard the digital data as voice data for information transmission (e.g., online lectures) and may emphasize (e.g., amplify) audio components belonging to a specific frequency (e.g., about 1 kHz) in the digital data for clear information transmission. For example, when the number of channels exceeds two, the audio processing module (340) may regard the digital data as audio data having surround sound and may apply a processing method for emphasizing three-dimensionality and presence to the audio signal received from the codec (330). For example, when the number of channels is two, the audio processing module (340) may not apply the above processing method to the digital data, but may output the audio signal to the speaker.
- the audio processing module (340) may not apply the above processing method to the digital data, but may output the audio signal to the speaker.
- the audio processing module (340) can process digital data based on a sampling rate. For example, if the sampling rate is a specified first value (e.g., 44.1 kHz), the audio processing module (340) can consider the corresponding digital data as music data. If the digital data is considered as music data, the audio processing module (340) can output an audio signal received from the codec (330) to a speaker. If the sampling rate is a specified second value (e.g., 48 kHz) that is greater than the first value, the audio processing module (340) can consider the corresponding digital data as audio data included in multimedia (e.g., a movie or a game).
- a specified first value e.g. 44.1 kHz
- the audio processing module (340) can consider the corresponding digital data as music data. If the digital data is considered as music data, the audio processing module (340) can output an audio signal received from the codec (330) to a speaker. If the sampling rate is a specified second value (e.g., 48 kHz)
- the audio processing module (340) can process the audio signal received from the codec (330) to provide dynamic effects to the multimedia. If the sampling rate is greater than or equal to a designated third value (e.g., 96 kHz) that is greater than the second value, the audio processing module (340) may regard the digital data as audio data having high resolution, and may process the audio signal received from the codec (330) based on the performance of the speaker.
- a designated third value e.g., 96 kHz
- the audio processing module (340) may emphasize (e.g., amplify) audio components of a designated low frequency band (e.g., less than 40 Hz) and a designated high frequency band (e.g., greater than 16 kHz) in the audio signal received from the codec (330). If the speaker (350) has a performance higher than the designated standard, the audio processing module (340) may output the audio signal received from the codec (330) to the playback device without the aforementioned emphasis processing.
- a designated low frequency band e.g., less than 40 Hz
- a designated high frequency band e.g., greater than 16 kHz
- the audio processing module (340) may process digital data based on a bit rate. For example, if the bit rate exceeds 100 kbps, the audio processing module (340) may regard the digital data as audio data compressed with less loss. Accordingly, the audio processing module (340) may output an audio signal received from the codec (330) to a playback device. If the bit rate is 100 kbps or less, the audio processing module (340) may regard the corresponding digital data as audio data compressed with relatively more loss.
- the audio processing module (340) may perform an operation of restoring audio components of a high frequency band (e.g., 11 kHz or more) lost in the process of compressing the audio signal, or an operation of attenuating audio components of a high frequency band and a low frequency band.
- a high frequency band e.g., 11 kHz or more
- the audio processing module (340) may include a DAC (e.g., DAC (250) of FIG. 2).
- the DAC may convert a digital audio signal into an analog audio signal and output it to the speaker (350).
- the speaker (350) may convert the received analog audio signal into a sound wave and output it.
- the audio processing module (340) may select a device to play back digital data.
- the audio processing module (340) may select the speaker (350) of the electronic device (300) as the playback device through the communication module (320) (e.g., a Bluetooth module or a Wi-Fi module).
- the sensor (360) may include at least one of a proximity sensor, a contact sensor, a touch sensor, and an acceleration sensor.
- the proximity sensor may detect that an external object (e.g., a user's ear) approaches within a predetermined distance of the electronic device (300).
- the proximity sensor may be implemented as an optical proximity sensor, but is not limited thereto.
- the proximity sensor may be implemented as any one of a magnetic proximity sensor, an ultrasonic proximity sensor, and an inductive proximity sensor.
- the contact sensor may detect contact with an external object when the external object is a part of the body.
- the contact sensor may be implemented as a capacitive type sensor, and may not output a signal corresponding to contact detection when an external object that is not a part of the body makes contact.
- the contact sensor may be configured as an integrated circuit (IC) integrated with a touch sensor.
- the touch sensor may receive a user's touch input.
- a touch sensor can be used as an input means for performing a control operation of an electronic device (300) related to audio output.
- An acceleration sensor can detect the acceleration and intensity of impact of the electronic device (300).
- the acceleration sensor can be at least one of an inertia sensor and a gyroscope.
- the memory (388) (e.g., the memory (130) of FIG. 1) can store at least one instruction.
- the memory (388) can store instructions necessary for the operation of the audio processing module (340).
- the processor (399) (e.g., the processor (120) of FIG. 1) can operate the audio processing module (340) by executing the at least one instruction.
- the audio processing module (340) can be executed by a processor specialized in audio signal processing (e.g., the auxiliary processor (123) of FIG. 1, or the audio signal processor (240) of FIG. 2).
- Figure 4 illustrates a block configuration of an audio processing module (400) according to one embodiment.
- the audio processing module (400) of the present disclosure may receive an input audio signal from a codec (e.g., the codec (330) of FIG. 3).
- the input audio signal may include a digital audio signal (e.g., digital data).
- the audio processing module (400) may process the input audio signal and output it to at least one speaker (e.g., the speaker (350) of FIG. 3).
- the at least one speaker may include a piezo speaker.
- the piezo speaker may be at least one of a disk piezo speaker, a bass strip piezo speaker, a tweeter piezo speaker, a glass/ceramic piezo speaker, and a plain form piezo speaker.
- the piezo speaker can output sound by directly driving an internal diaphragm. Accordingly, the piezo speaker may require a high voltage output to drive the diaphragm.
- the audio processing module (400) may include a digital amplifier (410) that amplifies a digital audio signal, a DAC (420) that converts the digital audio signal into an analog audio signal, an analog amplifier (430) that amplifies an analog audio signal, a boost amplifier (440) that boosts the analog audio signal to a reference high voltage or higher, and at least one noise gate (NG) that removes noise included in the analog audio signal.
- a digital amplifier (410) that amplifies a digital audio signal
- a DAC 420
- analog amplifier 430
- boost amplifier 440
- NG noise gate
- the digital amplifier (410) can digitally amplify a digital audio signal by applying a digital gain to the digital audio signal.
- the digital amplifier (410) can convert an input digital audio signal into a number and amplify the size of an output digital audio signal by adjusting the size of a number multiplied by the digital audio signal.
- the DAC (420) can receive a digital audio signal from the digital amplifier (410) and convert the digital audio signal into an analog audio signal.
- the DAC (420) can convert the digital audio signal from a binary number into an analog voltage to generate an analog audio signal.
- An analog amplifier (430) can amplify an analog audio signal in an analog manner by applying an analog gain to the analog audio signal.
- the analog amplifier (430) can amplify the size of an output analog audio signal by adjusting a voltage multiplied by an input analog audio signal.
- the boost amplifier (440) can boost an analog audio signal to a reference high voltage or higher.
- the boost amplifier (440) can generate a high voltage output for driving a piezo speaker by boosting an analog audio signal.
- the reference high voltage can be a minimum voltage for driving the piezo speaker.
- the reference high voltage can have a voltage level of 27 V to 33 V.
- At least one noise gate can remove noise included in an analog audio signal.
- at least one noise gate can remove at least one of DAC noise generated by a DAC (420), analog amplifier noise generated by an analog amplifier (430), and boost amplifier noise generated by a boost amplifier (440).
- At least one noise gate can output an analog audio signal from which noise has been removed to at least one speaker.
- the electronic device can perform dynamic range enhancement (DRE) on an input audio signal.
- DRE can increase the dynamic range of the input audio signal and minimize noise and distortion of the input audio signal.
- the digital amplifier (410) can apply a positive (+) digital gain to the digital audio signal.
- the analog amplifier (430) can apply a negative (-) analog gain to the analog audio signal.
- the size of the above digital gain and the size of the above analog gain may be the same.
- the digital amplifier (410) and the analog amplifier (430) may perform DRE (dynamic range enhancement) by setting the positive (+) digital gain and the negative (-) analog gain so that the total gain of the positive (+) digital gain and the negative (-) analog gain becomes 0 dB.
- DRE dynamic range enhancement
- the electronic device can perform DRE on the input audio signal and remove noise generated during audio processing using a noise gate (NG), thereby implementing high-resolution sound with minimized noise.
- NG noise gate
- FIG. 5 illustrates a block configuration of an audio processing module (500) according to one embodiment.
- the audio processing module (500) may include a digital amplifier (510), a DAC (520), a first noise gate (NG1), an analog amplifier (530), a boost amplifier (540), and a second noise gate (NG2).
- the digital amplifier (510) and the analog amplifier (530) may perform DRE (dynamic range enhancement) by setting the positive (+) digital gain and the negative (-) analog gain such that the total gain of the positive (+) digital gain and the negative (-) analog gain becomes 0 dB.
- the boost amplifier (540) may generate a high voltage output for driving a piezo speaker by boosting an analog audio signal.
- the audio processing module (500) may include a first noise gate (NG1) disposed between the DAC (520) and the analog amplifier (530), and a second noise gate (NG2) disposed between the boost amplifier (540) and at least one speaker.
- the first noise gate (NG1) may remove DAC noise generated by the DAC (520).
- the second noise gate (NG2) may remove analog amplifier noise generated by the analog amplifier (530) and boost amplifier noise generated by the boost amplifier (540).
- the first noise gate (NG1) can remove DAC noise generated in the DAC (520) and output an analog audio signal from which the DAC noise has been removed to the analog amplifier (530).
- the DAC noise may be system noise generated in a process in which the DAC (520) converts a digital audio signal into an analog audio signal.
- the threshold level of the first noise gate (NG1) may be set based on the DAC noise.
- the first noise gate (NG1) can remove DAC noise as a noise removal signal is input.
- the second noise gate (NG2) can remove analog amplifier noise generated from the analog amplifier (530) and boost amplifier noise generated from the boost amplifier (540), and output an analog audio signal from which the analog amplifier noise and the boost amplifier noise have been removed to at least one speaker.
- the analog amplifier noise may be noise generated during a process in which an analog audio signal is amplified by the analog amplifier (530).
- the boost amplifier noise may be noise generated during a process in which an analog audio signal is boosted by the boost amplifier (540).
- the threshold level of the second noise gate (NG2) can be determined by [Formula 1] below.
- TL is the threshold level of the noise gate
- Noise AA is the analog amplifier noise
- Gain BA is the gain of the boost amplifier (540)
- Noise BA may be the boost amplifier noise.
- FIG. 6 illustrates a block configuration of an audio processing module (600) according to one embodiment.
- the audio processing module (600) may include a digital amplifier (610), a DAC (620), a first noise gate (NG1), an analog amplifier (630), a third noise gate (NG3), a boost amplifier (640), and a second noise gate (NG2).
- the digital amplifier (610) and the analog amplifier (630) may perform DRE (dynamic range enhancement) by setting the positive (+) digital gain and the negative (-) analog gain such that the total gain of the positive (+) digital gain and the negative (-) analog gain becomes 0 dB.
- the boost amplifier (640) may generate a high voltage output for driving a piezo speaker by boosting an analog audio signal.
- the audio processing module (600) may include a first noise gate (NG1) disposed between the DAC (620) and the analog amplifier (630), a second noise gate (NG2) disposed between the boost amplifier (640) and at least one speaker, and a third noise gate (NG3) disposed between the analog amplifier (630) and the boost amplifier (640).
- the first noise gate (NG1) may remove DAC noise generated by the DAC (620).
- the second noise gate (NG2) may remove boost amplifier noise generated by the boost amplifier (640).
- the third noise gate (NG3) may remove analog amplifier noise generated by the analog amplifier (630).
- the first noise gate (NG1) can remove DAC noise generated in the DAC (620) and output an analog audio signal from which the DAC noise has been removed to the analog amplifier (630).
- the DAC noise may be system noise generated in the process of the DAC (620) converting a digital audio signal into an analog audio signal.
- the threshold level of the first noise gate (NG1) may be set based on the DAC noise.
- the first noise gate (NG1) can remove DAC noise as a noise removal signal is input.
- the third noise gate (NG3) can remove analog amplifier noise generated by the analog amplifier (630) and output an analog audio signal with the analog amplifier noise removed to the boost amplifier (640).
- the analog amplifier noise may be noise generated in the process of an analog audio signal being amplified by the analog amplifier (630).
- the threshold level of the third noise gate (NG3) can be set based on the analog amplifier noise.
- the second noise gate (NG2) can remove the boost amplifier noise generated by the boost amplifier (640) and output the analog audio signal with the boost amplifier noise removed to at least one speaker.
- the boost amplifier noise may be noise generated in the process of the analog audio signal being boosted by the boost amplifier (640).
- the threshold level of the second noise gate (NG2) can be set based on the boost amplifier noise.
- Figure 7 illustrates a block configuration of an audio processing module (700) according to one embodiment.
- the audio processing module (700) may include a digital amplifier (710), a DAC (720), a first noise gate (NG1), a boost amplifier (730), an analog amplifier (740), and a second noise gate (NG2).
- the digital amplifier (710) and the analog amplifier (740) may perform DRE (dynamic range enhancement) by setting the positive (+) digital gain and the negative (-) analog gain such that the total gain of the positive (+) digital gain and the negative (-) analog gain becomes 0 dB.
- the boost amplifier (730) may generate a high voltage output for driving a piezo speaker by boosting an analog audio signal.
- the audio processing module (700) of FIG. 7 can perform amplification of the boosted analog audio signal after boosting is performed on the analog audio signal to generate a high voltage output.
- a higher power supply voltage may be required for the analog amplifier (740) compared to the audio processing module (400) of FIG. 4.
- Figure 8 illustrates a block configuration of an audio processing module (800) according to one embodiment.
- an audio processing module (800) may include a digital amplifier (810), a DAC (820), a first noise gate (NG1), a boost amplifier (830), an analog amplifier (840), and a second noise gate (NG2).
- the audio processing module (800) of FIG. 8 similar to the audio processing module (700) of FIG. 7, may perform amplification of an analog audio signal after boosting is performed on an analog audio signal to generate a high voltage output.
- the boost amplifier (830) may include at least two sub-amplifiers (e.g., Sub-Amp1, Sub-Amp2, Sub-Amp3, ..., Sub-AmpN).
- the at least two sub-amplifiers may be arranged in parallel with each other within the boost amplifier (830). Based on the at least two sub-amplifiers being connected in parallel with each other, the signal-to-noise ratio (SNR) of the analog audio signal boosted by the boost amplifier (830) may increase.
- SNR signal-to-noise ratio
- the analog audio signals boosted by at least two sub-amplifiers may be correlated.
- the analog audio signals boosted by N sub-amplifiers connected in parallel may be increased N times.
- the boost amplifier noise generated by at least two sub-amplifiers may be uncorrelated.
- the boost amplifier noise generated by N sub-amplifiers connected in parallel may be can be increased by a factor of 1. In this way, the signal-to-noise ratio of the analog audio signal can be increased based on the correlation difference between the analog audio signal and the boost amplifier noise in the N sub-amplifiers connected in parallel.
- FIG. 9 illustrates a block configuration of an audio processing module (900) according to one embodiment.
- an audio processing module (900) may include a bit-depth converter (910), a DAC (920), a first noise gate (NG1), an analog amplifier (930), and a second noise gate (NG2).
- the audio processing module (900) may include a bit-depth converter (910) in which the digital amplifier and the boost amplifier are integrated.
- the bit depth converter (910) and the analog amplifier (930) can perform DRE (dynamic range enhancement) by setting the positive (+) digital gain and the negative (-) analog gain so that the total gain of the positive (+) digital gain and the negative (-) analog gain becomes 0 dB.
- DRE dynamic range enhancement
- the bit depth converter (910) can generate a high voltage output for driving a piezo speaker by boosting a digital audio signal.
- the bit depth converter (910) can increase the digital gain by changing the bit depth of the digital audio signal.
- the bit depth converter (910) can output a digital audio signal (e.g., 32-bit float) by increasing the bit depth of an input audio signal (e.g., 24-bit fixed). Since headroom is secured as the bit depth increases, the digital audio signal (e.g., 32-bit float) is prevented from overflowing and a high digital gain can be applied.
- FIG. 10 illustrates a block configuration of an audio processing module (1000) according to one embodiment.
- the audio processing module (1000) may include a digital amplifier (1010), a DAC (1020), a first noise gate (NG1), an analog amplifier (1030), a boost amplifier (1040), and a second noise gate (NG2).
- the digital amplifier (1010) and the analog amplifier (1030) may perform DRE (dynamic range enhancement) by setting the positive (+) digital gain and the negative (-) analog gain such that the total gain of the positive (+) digital gain and the negative (-) analog gain becomes 0 dB.
- the boost amplifier (1040) may generate a high voltage output for driving a piezo speaker by boosting an analog audio signal.
- the DAC (1020) may be implemented as a multi-DAC to separately process at least two channels.
- the DAC (1020) may be implemented as a 2-DAC (1020) to separately process the left channel and the right channel.
- the at least one speaker may be implemented as a 2-way speaker.
- the at least one speaker may include a coil speaker operating as a woofer and a piezo speaker operating as a tweeter.
- An analog audio signal output from an analog amplifier (1030) may be branched and output to at least one of the coil speaker and the piezo speaker.
- the coil speaker may receive a first analog audio signal amplified by the analog amplifier (1030).
- the piezo speaker may receive a second analog audio signal in which the first analog audio signal is boosted to a voltage higher than the reference high voltage by the boost amplifier (1040) and analog amplifier noise generated by the analog amplifier (1030) and the boost amplifier noise generated by the boost amplifier (1040) are removed.
- Fig. 11 illustrates a sound output method using an electronic device according to one embodiment.
- the sound output method illustrated in Fig. 11 can be implemented based on the electronic device (101) of Fig. 1.
- a digital amplifier e.g., a digital amplifier (410) of FIG. 4
- the digital amplifier can convert an input digital audio signal into a number and amplify the size of an output digital audio signal by adjusting the size of a number multiplied by the digital audio signal.
- a DAC may receive a digital audio signal from a digital amplifier (e.g., digital amplifier (410) of FIG. 4) and convert the digital audio signal into an analog audio signal.
- the DAC may convert the digital audio signal from a binary number into an analog voltage to generate an analog audio signal.
- an analog amplifier e.g., an analog amplifier (430) of FIG. 4
- the analog amplifier can amplify the size of an output analog audio signal by adjusting a voltage multiplied by an input analog audio signal.
- the audio output method can perform dynamic range enhancement (DRE) on an input audio signal.
- DRE can increase a dynamic range of the input audio signal and minimize noise and distortion of the input audio signal.
- the operation of amplifying the digital audio signal can apply a positive (+) digital gain to the digital audio signal.
- the operation of amplifying the analog audio signal can apply a negative (-) analog gain to the analog audio signal.
- the operation of amplifying the above digital audio signal and the operation of amplifying the above analog audio signal can perform DRE (dynamic range enhancement) by setting the positive (+) digital gain and the negative (-) analog gain so that the total gain of the positive (+) digital gain and the negative (-) analog gain becomes 0 dB.
- DRE dynamic range enhancement
- a boost amplifier may boost an analog audio signal to a reference high voltage or higher.
- the boost amplifier may generate a high voltage output for driving a piezo speaker by boosting the analog audio signal.
- the reference high voltage may be a minimum voltage for driving the piezo speaker.
- At least one noise gate can remove noise included in an analog audio signal.
- the at least one noise gate can remove at least one of DAC noise generated by the DAC, analog amplifier noise generated by the analog amplifier, and boost amplifier noise generated by the boost amplifier.
- the at least one noise gate can output the analog audio signal from which noise has been removed to at least one speaker.
- the audio processing module can output an analog audio signal to at least one speaker.
- the at least one speaker can include a piezo speaker.
- the audio processing module can output a high voltage output of the analog audio signal boosted to the at least one piezo speaker.
- At least one speaker can output sound based on an analog audio signal.
- at least one piezo speaker can receive a high voltage output of a boosted analog audio signal from an audio processing module, and output high-resolution sound to a user based on the analog audio signal.
- the electronic device for outputting sound of the present disclosure and the sound output method using the same perform DRE (dynamic range enhancement) on an input audio signal and remove noise occurring in an audio processing process using a noise gate, thereby enabling implementation of high-resolution sound with minimized noise.
- DRE dynamic range enhancement
- the electronic device for outputting sound of the present disclosure and the sound output method using the same can drive a piezo speaker requiring high voltage output by boosting an input audio signal above a reference high voltage.
- FIG. 12a illustrates a block configuration of a wearable electronic device according to one embodiment.
- the wearable electronic device (1200) may include a first wireless earphone (1200-1) and a second wireless earphone (1200-2).
- the first wireless earphone (1200-1) and the second wireless earphone (1200-2) may include substantially the same or similar configurations.
- the first wireless earphone (1200-1) and the second wireless earphone (1200-2) may perform substantially the same or similar functions.
- the wearable electronic device (1200) may include at least some of the components included in the electronic device (101) disclosed in FIG. 1.
- the wearable electronic device (1200) may include the audio module (170) of FIG. 1.
- the first wireless earphone (1200-1) may include a first speaker (1220-1), a first microphone (1230-1), a first sensor module (1276-1), a first processor (1260-1), and/or a first communication module (1290-1).
- the second wireless earphone (1200-2) may include a second speaker (1220-2), a second microphone (1230-2), a second sensor module (1276-2), a second processor (1260-2), and/or a second communication module (1290-2).
- a wearable electronic device (1200) e.g., a first wireless earphone (1200-1) and/or a second wireless earphone (1200-2)
- an electronic device e.g., an electronic device (101) of FIG. 1
- the first speaker (1220-1) and/or the second speaker (1220-2) may include the audio output module (155) of FIG. 1.
- the first microphone (1230-1) and/or the second microphone (1230-2) may include the input module (150) of FIG. 1.
- the first sensor module (1276-1) and/or the second sensor module (1276-2) may include the sensor module (176) of FIG. 1.
- the first processor (1260-1) and/or the second processor (1260-2) may include the processor (120) of FIG. 1.
- the first communication module (1290-1) and/or the second communication module (1290-2) may include the communication module (190) of FIG. 1.
- the first speaker (1220-1) may include at least one of a tweeter speaker and a coil speaker.
- the second speaker (1220-2) may include at least one of a tweeter speaker and a coil speaker.
- the first speaker (1220-1) and/or the second speaker (1220-2) can generate analog sound based on an input signal (e.g., an acoustic signal and/or an audio signal) input to the wearable electronic device (1200).
- the first speaker (1220-1) and/or the second speaker (1220-2) can output the analog sound to the user through the speaker hole.
- the first microphone (1230-1) and/or the second microphone (1230-2) can receive sounds (e.g., sound signals and/or audio signals) generated in the vicinity of the wearable electronic device (1200).
- the first microphone (1230-1) and/or the second microphone (1230-2) can convert sounds input through a sound hole (e.g., the sound hole (1255) of FIG. 12B) into electrical signals.
- the first microphone (1230-1) can transmit the converted electrical signals to the first processor (1260-1), and the second microphone (1230-2) can transmit the converted electrical signals to the second processor (1260-2).
- the first sensor module (1276-1) and/or the second sensor module (1276-2) can detect a rotational direction, a rotational speed, and/or a rotational angle of the wearable electronic device (1200).
- the first sensor module (1276-1) and/or the second sensor module (1276-2) can include a gyro sensor (e.g., a rotation detection sensor) and/or an acceleration sensor.
- the gyro sensor e.g., a rotation detection sensor
- the gyro sensor can measure signals related to angular velocity and/or angle acting with respect to each axis of the wearable electronic device (1200).
- the gyro sensor e.g., a rotation detection sensor
- the acceleration sensor can measure signals related to acceleration of the wearable electronic device (1200).
- an acceleration sensor can measure the rotation angles of the roll, pitch, and yaw axes around a reference axis.
- the first communication module (1290-1) and/or the second communication module (1290-2) may communicate with the electronic device (101) and/or the external electronic device (102, 104, 108) of FIG. 1 through a network (e.g., the first network (198) and/or the second network (199) of FIG. 1) to receive and/or transmit various information.
- a network e.g., the first network (198) and/or the second network (199) of FIG. 1.
- the first processor (1260-1) may be electrically connected to the first communication module (1290-1), and the second processor (1260-2) may be electrically connected to the second communication module (1290-2).
- the first processor (1260-1) may process various information received from the electronic device (101) and/or the external electronic device (102, 104, 108) through the first communication module (1290-1).
- the second processor (1260-2) may process various information received from the electronic device (101) and/or the external electronic device (102, 104, 108) through the second communication module (1290-2).
- the first processor (1260-1) can transmit various information to the electronic device (101) and/or the external electronic device (102, 104, 108) through the first communication module (1290-1).
- the second processor (1260-2) can transmit various information to the electronic device (101) and/or the external electronic device (102, 104, 108) through the second communication module (1290-2).
- the first processor (1260-1) may be operatively or electrically connected to a first speaker (1220-1), a first microphone (1230-1), a first sensor module (1276-1), and a first communication module (1290-1).
- the second processor (1260-2) may be operatively or electrically connected to a second speaker (1220-2), a second microphone (1230-2), a second sensor module (1276-2), and a second communication module (1290-2).
- FIG. 12b illustrates an external configuration of a wearable electronic device according to one embodiment
- FIG. 12c illustrates an internal configuration of a wearable electronic device according to one embodiment.
- the wearable electronic device (1200) disclosed in FIGS. 12b and 12c may be the first wireless earphone (1200-1) or the second wireless earphone (1200-2) disclosed in FIG. 12a.
- the wearable electronic device (1200) disclosed in FIGS. 12b and 12c may substantially identically include the embodiments described in the first wireless earphone (1200-1) or the second wireless earphone (1200-2) disclosed in FIG. 12a.
- the wearable electronic device (1200) is worn on the user's ear and can output sound of music or a video or process the user's voice.
- the wearable electronic device (1200) can operate independently in a stand-alone manner or can operate in conjunction with an external electronic device (e.g., the electronic device (101), the electronic devices (102, 104) and/or the server (108) of FIG. 1) in an interaction manner.
- an external electronic device e.g., the electronic device (101), the electronic devices (102, 104) and/or the server (108) of FIG. 1
- the wearable electronic device (1200) can output sound corresponding to music or a video being played by itself or receive and process the user's voice.
- the wearable electronic device (1200) when the wearable electronic device (1200) operates through an interaction method, the wearable electronic device (1200) may be paired with an electronic device such as a smart phone (e.g., the electronic device (101) of FIG. 1) through Bluetooth communication, and may convert data received from the electronic device (e.g., the electronic device (101) of FIG. 1) to output sound or receive a user's voice and transmit it to the electronic device (e.g., the electronic device (101) of FIG. 1).
- a smart phone e.g., the electronic device (101) of FIG. 1
- Bluetooth communication e.g., the electronic device (101) of FIG. 1
- data received from the electronic device e.g., the electronic device (101) of FIG. 1
- the electronic device (101) of FIG. 1 may convert data received from the electronic device (e.g., the electronic device (101) of FIG. 1) to output sound or receive a user's voice and transmit it to the electronic device (e.g., the electronic device (101) of FIG. 1).
- a wearable electronic device (1200) may include a housing (1210), a speaker (1220) (e.g., a first speaker (1220-1) or a second speaker (1220-2)), a microphone (1230) (e.g., a first microphone (1230-1) or a second microphone (1230-2)), a printed circuit board (1240), a sound hole cover (1250), a sensor module (1276) (e.g., a first sensor module (1276-1) or a second sensor module (1276-2)), and/or a battery (1280).
- a housing (1210) e.g., a speaker (1220-1) or a second speaker (1220-2)
- a microphone (1230) e.g., a first microphone (1230-1) or a second microphone (1230-2)
- a printed circuit board (1240 e.g., a sound hole cover (1250
- a sensor module (1276) e.g., a first sensor module (1276-1) or a second sensor module (1276-2)
- the wearable electronic device (1200) is not limited to the configuration described above and may further include various other components.
- the housing (1210) can house and protect a speaker (1220) (e.g., a first speaker (1220-1) or a second speaker (1220-2)), a microphone (1230) (e.g., a first microphone (1230-1) or a second microphone (1230-2)), a printed circuit board (1240), and/or a sensor module (1276) (e.g., a first sensor module (1276-1) or a second sensor module (1276-2)).
- the housing (1210) can include a first housing (1210a) (e.g., an upper housing) and a second housing (1210b) (e.g., a lower housing).
- the first housing (1210a) e.g., an upper housing
- the second housing (1210b) e.g., a lower housing
- the first housing (1210a) and the second housing (1210b) may be formed integrally.
- the housing (1210) may include a protrusion (1211) for insertion into a user's ear.
- the housing (1210) may be integrally connected with the protrusion (1211).
- the protrusion (1211) may form a portion of the housing (1210).
- the protrusion (1211) may protrude outwardly from a portion of the housing (1210) in a substantially cylindrical shape.
- the protrusion (1211) may include a sound hole (1255) therein.
- the sound hole (1255) may include a speaker hole (not shown) in communication with a speaker (1220) (e.g., a first speaker (1220-1) or a second speaker (1220-2)) and/or a microphone hole (not shown) in communication with a microphone (1230) (e.g., a first microphone (1230-1) or a second microphone (1230-2)).
- a speaker hole (not shown) and the microphone hole (not shown) may be physically separated by a partition.
- the speaker hole (not shown) and the microphone hole (not shown) may not be separated by the partition.
- the speaker (1220) (e.g., the first speaker (1220-1) or the second speaker (1220-2)) can convert an electrical signal into sound (e.g., an audio signal) and output the converted sound through the sound hole (1255).
- the speaker (1220) can receive an electrical signal from a processor (e.g., the first processor (1260-1) or the second processor (1260-2)) disposed on the printed circuit board (1240).
- the speaker (1220) (e.g., the first speaker (1220-1) or the second speaker (1220-2)) can be configured in a cylindrical shape.
- the speaker (1220) (e.g., the first speaker (1220-1) or the second speaker (1220-2)) can be electrically connected to the printed circuit board (1240).
- the speaker (1220) may include at least one of a tweeter speaker (1220a) and a woofer speaker (1220b).
- the tweeter speaker (1220a) is a speaker unit that outputs high-frequency sounds and may be in charge of a high-frequency range of the speaker.
- the tweeter speaker (1220a) has a small diaphragm size, a narrow range of vibration, and may emphasize high-frequency output.
- the woofer speaker (1220b) is a large speaker unit that outputs low-frequency sounds and may be in charge of a low-frequency range of the speaker.
- the woofer speaker (1220b) has a large diaphragm size, a wide range of vibration, and may emphasize low-frequency output.
- At least one of the tweeter speaker (1220a) and the woofer speaker (1220b) may be implemented as a piezo speaker (e.g., the speaker (SPK) of FIG. 4).
- at least one of the tweeter speaker (1220a) and the woofer speaker (1220b) may be at least one of a disk piezo speaker, a bass strip piezo speaker, a tweeter piezo speaker, a glass/ceramic piezo speaker, and a plain form piezo speaker.
- the piezo speaker e.g., the speaker (SPK) of FIG. 4
- the piezo speaker may be the tweeter speaker (1220a) that outputs high-frequency sounds and may be responsible for a high-frequency range.
- a piezo speaker (e.g., speaker (SPK) of FIG. 4) may be a woofer speaker (1220b) that outputs low-frequency sounds and may be responsible for a low-frequency range.
- a piezo speaker e.g., speaker (SPK) of FIG. 4
- the microphone (1230) (e.g., the first microphone (1230-1) or the second microphone (1230-2)) can convert sound input through the sound hole (1255) into an electrical signal.
- the microphone (1230) (e.g., the first microphone (1230-1) or the second microphone (1230-2)) can transmit the converted electrical signal to a processor (e.g., the first processor (1260-1) or the second processor (1260-2)) disposed on the printed circuit board (1240).
- the microphone (1230) (e.g., the first microphone (1230-1) or the second microphone (1230-2)) can include at least one external microphone and/or at least one internal microphone. For example, referring to FIG.
- At least one external microphone may be positioned on an exterior surface of a housing (1210) (e.g., a first housing (1210a)).
- a housing (1210) e.g., a first housing (1210a)
- at least one internal microphone may be positioned adjacent to a printed circuit board (1240) within the housing (1210).
- a processor (e.g., a first processor (1260-1) or a second processor (1260-2)) may be disposed on a printed circuit board (1240).
- the processor e.g., the first processor (1260-1) or the second processor (1260-2)
- the processor may be electrically connected to a speaker (1220), a microphone (1230), and a sensor module (1276).
- the processor e.g., the first processor (1260-1) or the second processor (1260-2)
- the printed circuit board (1240) may include a flexible printed circuit board.
- a sound hole cover (1250) may be placed at an end of a protrusion (1211).
- the sound hole cover (1250) may cover an end of a protrusion (1211).
- the housing (1210) may prevent foreign substances from entering the interior of the sound hole (1255) through the sound hole cover (1250).
- the sound hole cover (1250) may include at least one hole to allow sound to enter and exit through the sound hole (1255).
- the sound hole cover (1250) may include a grill mesh.
- a sensor module (1276) (e.g., a first sensor module (1276-1) or a second sensor module (1276-2)) can be electrically connected to a processor (e.g., a first processor (1260-1) or a second processor (1260-2)) disposed on a printed circuit board (1240).
- the sensor module (1276) (e.g., a first sensor module (1276-1) or a second sensor module (1276-2)) can detect a rotational direction, a rotational speed, and/or a rotational angle of the wearable electronic device (1200).
- the sensor module (1276) (e.g., a first sensor module (1276-1) or a second sensor module (1276-2)) can include a gyro sensor (e.g., a rotation detection sensor), and/or an acceleration sensor.
- a gyro sensor e.g., a rotation detection sensor
- an acceleration sensor e.g., a rotation detection sensor
- the battery (1280) can power at least one component of the wearable electronic device (1200), such as the speaker (1220), the microphone (1230), the printed circuit board (1240), the sensor module (1276).
- the battery (1280) can include at least one of a rechargeable secondary battery and a fuel cell.
- FIG. 13 illustrates a wearable device (1320) electrically connected to an electronic device (1310) according to one embodiment.
- an electronic device (1310) and at least one wearable device (1320) can perform data communication.
- the electronic device (1310) can generate input data and output the input data to at least one wearable device (1320).
- the input data can include an input audio signal.
- the electronic device (1310) can be at least one of a smart phone, a tablet PC, a camera, a television, a home system control device, and a car.
- At least one wearable device (1320) can perform a predetermined function based on input data received from the electronic device (1310). For example, at least one wearable device (1320) can generate an analog audio signal based on an input audio signal received from the electronic device (1310) and output a sound based on the analog audio signal.
- at least one wearable device (1320) can include at least one of smart earphones (1321), a smart watch (1322), smart glasses (1323), and a smart ring (1324).
- At least one wearable device (1320) may include an audio processing module (e.g., audio processing module (400) of FIG. 4) and a speaker (e.g., speaker (SPK) of FIG. 4).
- at least one wearable device (1320) may include at least one of a digital amplifier that amplifies a digital audio signal, a DAC that converts the digital audio signal into an analog audio signal, an analog amplifier that amplifies an analog audio signal, a boost amplifier that boosts the analog audio signal to a reference high voltage or higher, and at least one noise gate that removes noise included in the analog audio signal.
- the speaker may include a piezo speaker.
- At least one wearable device (1320) can perform DRE on an input audio signal and remove noise generated during audio processing using a noise gate, thereby implementing high-resolution sound with minimized noise.
- An electronic device for outputting sound according to embodiments of the present disclosure may include a memory (e.g., a memory (130) of FIG. 1) for storing at least one command, a processor (e.g., a processor (120) of FIG. 1) for executing the at least one command, at least one speaker (e.g., an audio output module (155) of FIG. 1), and an audio processing module (e.g., an audio module (170) of FIG. 1) for processing an input audio signal and outputting the same to the at least one speaker.
- the above audio processing module may include a digital amplifier (e.g., a digital amplifier (410) of FIG.
- a DAC e.g., a DAC (420) of FIG. 4) that converts the digital audio signal into an analog audio signal
- an analog amplifier e.g., an analog amplifier (430) of FIG. 4) that amplifies the analog audio signal
- a boost amplifier e.g., a boost amplifier (440) of FIG. 4) that boosts the analog audio signal to a reference high voltage or higher
- at least one noise gate e.g., a noise gate (NG) of FIG. 4) that removes noise included in the analog audio signal.
- the digital amplifier may apply a positive (+) digital gain to the digital audio signal.
- the analog amplifier may apply a negative (-) analog gain to the analog audio signal.
- the digital amplifier and the analog amplifier can perform dynamic range enhancement (DRE) by setting the positive (+) digital gain and the negative (-) analog gain such that the total gain of the positive (+) digital gain and the negative (-) analog gain becomes 0 dB.
- DRE dynamic range enhancement
- the at least one speaker may comprise a piezo speaker.
- the reference high voltage may be a minimum voltage for driving the piezo speaker.
- the at least one noise gate can remove analog amplifier noise generated by the analog amplifier and boost amplifier noise generated by the boost amplifier.
- the threshold level of at least one noise gate can be determined by [Equation 1] below.
- TL is the threshold level of at least one noise gate
- Noise AA is the analog amplifier noise
- Gain BA is the boost amplifier gain
- Noise BA is the boost amplifier noise.
- the at least one noise gate can remove DAC noise generated by the DAC.
- the at least one noise gate may include a first noise gate disposed between the DAC and the analog amplifier and configured to remove DAC noise generated by the DAC, and a second noise gate disposed between the boost amplifier and the at least one speaker and configured to remove analog amplifier noise and boost amplifier noise.
- the at least one noise gate may include a first noise gate disposed between the DAC and the analog amplifier and configured to remove DAC noise generated by the DAC, a second noise gate disposed between the boost amplifier and the at least one speaker and configured to remove boost amplifier noise, and a third noise gate disposed between the analog amplifier and the boost amplifier and configured to remove analog amplifier noise.
- the at least one noise gate may include a first noise gate disposed between the DAC and the boost amplifier and configured to remove DAC noise generated by the DAC, and a second noise gate disposed between the analog amplifier and the at least one speaker and configured to remove boost amplifier noise and analog amplifier noise.
- the boost amplifier may include at least two sub-amplifiers. Based on the at least two sub-amplifiers being connected in parallel with each other, a signal to noise ratio of the analog audio signal boosted by the boost amplifier may be increased.
- the audio processing module may include a bit-depth converter integrating the digital amplifier and the boost amplifier.
- the bit-depth converter may increase the digital gain by changing the bit depth of the digital audio signal.
- the at least one speaker may include a coil speaker and a piezo speaker.
- the coil speaker may receive a first analog audio signal amplified by the analog amplifier.
- the piezo speaker may receive a second analog audio signal in which the first analog audio signal is boosted above the reference high voltage by the boost amplifier.
- the at least one noise gate can remove analog amplifier noise generated by the analog amplifier and boost amplifier noise generated by the boost amplifier.
- the software may include a computer program, code, instructions, or a combination of one or more of these, which may configure a processing device to perform a desired operation or may independently or collectively command the processing device.
- the software may be implemented as a computer program including instructions stored on a computer-readable storage medium. Examples of the computer-readable storage medium include magnetic storage media (e.g., Read-Only Memory (ROM), Random-Access Memory (RAM), floppy disks, hard disks, etc.) and optical readable media (e.g., CD-ROMs, Digital Versatile Discs (DVDs)).
- the computer-readable storage medium may be distributed across network-connected computer systems so that the computer-readable code may be stored and executed in a distributed manner.
- the computer program may be distributed online (e.g., by download or upload) via an application store (e.g., Play StoreTM) or directly between two user devices (e.g., smart phones).
- an application store e.g., Play StoreTM
- two user devices e.g., smart phones
- at least a part of the computer program product may be temporarily stored or temporarily created in a machine-readable storage medium, such as a memory of a manufacturer's server, a server of the application store, or an intermediary server.
- each component e.g., a module or a program of the above-described components may include a single or multiple entities, and some of the multiple entities may be separately arranged in other components.
- one or more components or operations of the above-described corresponding components may be omitted, or one or more other components or operations may be added.
- the multiple components e.g., a module or a program
- the integrated component may perform one or more functions of each of the multiple components identically or similarly to those performed by the corresponding component of the multiple components before the integration.
- the operations performed by the module, program, or other component may be executed sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.
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Abstract
Description
Claims (15)
- 입력 오디오 신호를 처리하여 적어도 하나의 스피커로 출력하는 오디오 처리 모듈(400)에 있어서,디지털 오디오 신호를 증폭하는 디지털 앰프(410);상기 디지털 오디오 신호를 아날로그 오디오 신호로 변환하는 DAC(420);상기 아날로그 오디오 신호를 증폭하는 아날로그 앰프(430);상기 아날로그 오디오 신호를 기준 고전압(reference high voltage) 이상으로 부스팅하는 부스트 앰프(440); 및상기 아날로그 오디오 신호에 포함된 노이즈를 제거하는 적어도 하나의 노이즈 게이트(NG)를 포함하고,상기 디지털 앰프는,상기 디지털 오디오 신호에 양(+)의 디지털 게인(digital gain)을 적용하고,상기 아날로그 앰프는,상기 아날로그 오디오 신호에 음(-)의 아날로그 게인(analog gain)을 적용하는,오디오 처리 모듈.
- 제1항에 있어서,상기 디지털 앰프 및 상기 아날로그 앰프는,상기 양(+)의 디지털 게인 및 상기 음(-)의 아날로그 게인의 합산 게인(total gain)이 0dB가 되도록 상기 양(+)의 디지털 게인 및 상기 음(-)의 아날로그 게인을 설정함으로써, DRE(dynamic range enhancement)를 수행하는,오디오 처리 모듈.
- 전술한 항 중 어느 한 항에 있어서,상기 적어도 하나의 노이즈 게이트는,상기 아날로그 앰프에서 생성된 아날로그 앰프 노이즈, 및 상기 부스트 앰프에서 생성된 부스트 앰프 노이즈를 제거하고,상기 DAC에서 생성되는 DAC 노이즈를 제거하는,오디오 처리 모듈.
- 제3항에 있어서,상기 적어도 하나의 노이즈 게이트의 임계 레벨(threshold level)은 아래 [수식1]에 의해 결정되는,오디오 처리 모듈.[수식1]TL=(NoiseAA×GainBA)+NoiseBA(단, 여기서, TL은 상기 적어도 하나의 노이즈 게이트의 상기 임계 레벨이고, NoiseAA는 상기 아날로그 앰프 노이즈이고, GainBA는 부스트 앰프 게인이고, NoiseBA는 상기 부스트 앰프 노이즈이다.)
- 전술한 항 중 어느 한 항에 있어서,상기 적어도 하나의 노이즈 게이트는,상기 DAC 및 상기 아날로그 앰프 사이에 배치되고, 상기 DAC에서 생성되는 DAC 노이즈를 제거하는 제1 노이즈 게이트; 및상기 부스트 앰프 및 상기 적어도 하나의 스피커 사이에 배치되고, 아날로그 앰프 노이즈 및 부스트 앰프 노이즈를 제거하는 제2 노이즈 게이트를 포함하는,오디오 처리 모듈.
- 전술한 항 중 어느 한 항에 있어서,상기 적어도 하나의 노이즈 게이트는,상기 DAC 및 상기 아날로그 앰프 사이에 배치되고, 상기 DAC에서 생성되는 DAC 노이즈를 제거하는 제1 노이즈 게이트;상기 부스트 앰프 및 상기 적어도 하나의 스피커 사이에 배치되고, 부스트 앰프 노이즈를 제거하는 제2 노이즈 게이트; 및상기 아날로그 앰프 및 상기 부스트 앰프 사이에 배치되고, 아날로그 앰프 노이즈를 제거하는 제3 노이즈 게이트를 포함하는,오디오 처리 모듈.
- 전술한 항 중 어느 한 항에 있어서,상기 적어도 하나의 노이즈 게이트는,상기 DAC 및 상기 부스트 앰프 사이에 배치되고, 상기 DAC에서 생성되는 DAC 노이즈를 제거하는 제1 노이즈 게이트; 및상기 아날로그 앰프 및 상기 적어도 하나의 스피커 사이에 배치되고, 부스트 앰프 노이즈 및 아날로그 앰프 노이즈를 제거하는 제2 노이즈 게이트를 포함하는,오디오 처리 모듈.
- 제7항에 있어서,상기 부스트 앰프는 적어도 두 개의 서브-앰프를 포함하고,상기 적어도 두 개의 서브-앰프가 상호 병렬 연결됨에 기초하여, 상기 부스트 앰프에 의해 부스팅된 상기 아날로그 오디오 신호의 신호대잡음비(signal to noise ratio)가 증가하는,오디오 처리 모듈.
- 전술한 항 중 어느 한 항에 있어서,상기 오디오 처리 모듈은,상기 디지털 앰프 및 상기 부스트 앰프가 통합된 비트 뎁스 컨버터(bit-depth converter)를 더 포함하고,상기 비트 뎁스 컨버터는,상기 디지털 오디오 신호의 비트 뎁스를 변경함으로써, 상기 디지털 게인을 증가시키는,오디오 처리 모듈.
- 음향을 출력하는 전자 장치에 있어서,적어도 하나의 명령어를 저장하는 메모리;상기 적어도 하나의 명령어를 실행하는 프로세서;적어도 하나의 스피커; 및전술한 항 중 어느 한 항에 따른 오디오 처리 모듈을 포함하는,전자 장치.
- 제10항에 있어서,상기 적어도 하나의 스피커는 코일(coil) 스피커 및 피에조(piezo) 스피커를 포함하고,상기 기준 고전압은 상기 피에조 스피커를 구동하기 위한 최소 전압이고,상기 코일 스피커는 상기 아날로그 앰프에서 증폭된 제1 아날로그 오디오 신호를 수신하고,상기 피에조 스피커는 상기 제1 아날로그 오디오 신호가 상기 부스트 앰프에서 상기 기준 고전압 이상으로 부스팅된 제2 아날로그 오디오 신호를 수신하는,전자 장치.
- 음향을 출력하는 방법에 있어서,디지털 오디오 신호를 증폭하는 동작(1110);상기 디지털 오디오 신호를 아날로그 오디오 신호로 변환하는 동작(1120);상기 아날로그 오디오 신호를 증폭하는 동작(1130);상기 아날로그 오디오 신호를 기준 고전압(reference high voltage) 이상으로 부스팅하는 동작(1140);상기 아날로그 오디오 신호에 포함된 노이즈를 제거하는 동작(1150); 및상기 아날로그 오디오 신호를 적어도 하나의 스피커로 출력하는 동작(1160)을 포함하고,상기 디지털 오디오 신호를 증폭하는 동작은,상기 디지털 오디오 신호에 양(+)의 디지털 게인(digital gain)을 적용하고,상기 아날로그 오디오 신호를 증폭하는 동작은,상기 아날로그 오디오 신호에 음(-)의 아날로그 게인(analog gain)을 적용하는,방법.
- 제12항에 있어서,상기 디지털 오디오 신호를 증폭하는 동작 및 상기 아날로그 오디오 신호를 증폭하는 동작은,상기 양(+)의 디지털 게인 및 상기 음(-)의 아날로그 게인의 합산 게인(total gain)이 0dB가 되도록 상기 양(+)의 디지털 게인 및 상기 음(-)의 아날로그 게인을 설정함으로써, DRE(dynamic range enhancement)를 수행하는,방법.
- 제12항 또는 제13항에 있어서,상기 적어도 하나의 스피커는 피에조(piezo) 스피커를 포함하고,상기 기준 고전압은 상기 피에조 스피커를 구동하기 위한 최소 전압인,방법.
- 제12항, 제13항, 또는 제14항에 있어서,상기 아날로그 오디오 신호에 포함된 노이즈를 제거하는 동작은,상기 아날로그 앰프에서 생성된 아날로그 앰프 노이즈, 및 상기 부스트 앰프에서 생성된 부스트 앰프 노이즈를 제거하는,방법.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP24700169.6A EP4468739A2 (en) | 2023-04-12 | 2024-01-09 | Electronic device for outputting sound and sound output method using same |
| CN202480017095.XA CN120752932A (zh) | 2023-04-12 | 2024-01-09 | 输出声音的电子装置和使用该电子装置的声音输出方法 |
| US19/307,855 US20250373212A1 (en) | 2023-04-12 | 2025-08-22 | Electronic device outputting sound and sound output method using the same |
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| Application Number | Priority Date | Filing Date | Title |
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| KR10-2023-0048284 | 2023-04-12 | ||
| KR20230048284 | 2023-04-12 | ||
| KR10-2023-0064997 | 2023-05-19 | ||
| KR1020230064997A KR20240152177A (ko) | 2023-04-12 | 2023-05-19 | 음향을 출력하는 전자 장치 및 이를 이용한 음향 출력 방법 |
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| Application Number | Title | Priority Date | Filing Date |
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| US19/307,855 Continuation US20250373212A1 (en) | 2023-04-12 | 2025-08-22 | Electronic device outputting sound and sound output method using the same |
Publications (2)
| Publication Number | Publication Date |
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| WO2024214920A2 true WO2024214920A2 (ko) | 2024-10-17 |
| WO2024214920A3 WO2024214920A3 (ko) | 2025-06-26 |
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| PCT/KR2024/000370 Ceased WO2024214920A2 (ko) | 2023-04-12 | 2024-01-09 | 음향을 출력하는 전자 장치 및 이를 이용한 음향 출력 방법 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20250373212A1 (ko) |
| EP (1) | EP4468739A2 (ko) |
| CN (1) | CN120752932A (ko) |
| WO (1) | WO2024214920A2 (ko) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6961385B2 (en) * | 2003-01-21 | 2005-11-01 | Cirrus Logic, Inc. | Signal processing system with baseband noise modulation chopper circuit timing to reduce noise |
| KR20050033966A (ko) * | 2003-10-07 | 2005-04-14 | 엘지전자 주식회사 | 기록 매체의 오디오 출력 장치 및 방법 |
| CN101060314B (zh) * | 2006-04-19 | 2011-06-08 | 鸿富锦精密工业(深圳)有限公司 | 保护听力的方法及声音输出装置 |
| GB0715254D0 (en) * | 2007-08-03 | 2007-09-12 | Wolfson Ltd | Amplifier circuit |
| US9059877B2 (en) * | 2013-05-31 | 2015-06-16 | Qualcomm Incorporated | Dynamic gain for DAC illumination control |
-
2024
- 2024-01-09 EP EP24700169.6A patent/EP4468739A2/en active Pending
- 2024-01-09 WO PCT/KR2024/000370 patent/WO2024214920A2/ko not_active Ceased
- 2024-01-09 CN CN202480017095.XA patent/CN120752932A/zh active Pending
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Also Published As
| Publication number | Publication date |
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| EP4468739A2 (en) | 2024-11-27 |
| WO2024214920A3 (ko) | 2025-06-26 |
| US20250373212A1 (en) | 2025-12-04 |
| CN120752932A (zh) | 2025-10-03 |
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