EP1061774A2 - Système audio avec processeur de champ sonore - Google Patents

Système audio avec processeur de champ sonore Download PDF

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Publication number
EP1061774A2
EP1061774A2 EP00111950A EP00111950A EP1061774A2 EP 1061774 A2 EP1061774 A2 EP 1061774A2 EP 00111950 A EP00111950 A EP 00111950A EP 00111950 A EP00111950 A EP 00111950A EP 1061774 A2 EP1061774 A2 EP 1061774A2
Authority
EP
European Patent Office
Prior art keywords
headphone
sound field
signal
output device
outputs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00111950A
Other languages
German (de)
English (en)
Other versions
EP1061774B1 (fr
EP1061774A3 (fr
Inventor
Masaki Katayama
Yasuhiro Fujimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yamaha Corp
Original Assignee
Yamaha Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yamaha Corp filed Critical Yamaha Corp
Publication of EP1061774A2 publication Critical patent/EP1061774A2/fr
Publication of EP1061774A3 publication Critical patent/EP1061774A3/fr
Application granted granted Critical
Publication of EP1061774B1 publication Critical patent/EP1061774B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems
    • H04S1/002—Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems
    • H04S1/002—Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
    • H04S1/005—For headphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00—Details of connection covered by H04R, not provided for in its groups
    • H04R2420/05—Detection of connection of loudspeakers or headphones to amplifiers

Definitions

  • This invention relates to an audio system that is suitable for being used with a headphone or speakers selectively.
  • a system using a three-dimensional (3D) sound field processor is well known as an audio system capable of creating a 3D sound field.
  • a sound field filtering process artificially creates a time lag and a difference in strength among sonic waves reaching ears. By that, sound sources are virtually created where real speakers are not located in order to provide 3D sound.
  • an audio system comprising: a sound field processor that performs three-dimensional sound field process for a headphone to an input signal and outputs a processed signal; a loudspeaker output device that receives an input signal and outputs amplified signal to a loudspeaker; a headphone output device that receives either an input signal or the processed signal, outputs either said input signal or said processed signal as amplified signal to a headphone and is capable of being connected to said sound field processor; a headphone connector connected to said headphone output device; a headphone detector that is operably coupled to said headphone connector and detects whether a headphone is connected to said headphone connector or not; and a switch controller that is operably coupled to said headphone detector and said sound filed processor, and makes said sound field processor perform said three-dimensional sound field process for a headphone and supply the processed signal to said headphone output device when said headphone detector detects a headphone.
  • an audio system comprising: a sound field processor that performs selectively either three-dimensional sound field process for a headphone or three-dimensional sound field process for a loudspeaker to an input signal and outputs a processed signal; a loudspeaker output device that receives either an input signal or the processed signal, outputs either said input signal or said processed signal as amplified signal to a loudspeaker and is capable of being connected to said sound field processor; a headphone output device that receives either an input signal or the processed signal, outputs either said input signal or said processed signal as amplified signal to a headphone and is capable of being connected to said sound field processor; a headphone connector connected to said headphone output device; a headphone detector that is operably coupled to said headphone connector and detects whether a headphone is connected to said headphone connector or not; and a switch controller that is operably coupled to said headphone detector and said sound filed processor, makes said Sound field processor perform said three-dimensional sound field process for a louds
  • FIG. 1 is a block diagram showing the structure of an audio system according to an embodiment of the invention.
  • An audio system 1 has a receiver 2, a personal computer (PC) 14, a mini-disk (MD) player 15 and a cassette tape deck 16.
  • PC personal computer
  • MD mini-disk
  • a CPU 7 controls all the other parts of the receiver 2 and is operated by a program stored in a ROM 9. The program stored in the ROM 9 will be described later.
  • a display 8 displays various displays under the control of the CPU 7.
  • RAM 10 is used as a working area of the CPU 7, and various data are temporarily saved therein.
  • An operation panel 6 has many switches or the like for various operations by a user.
  • the CPU 7 detects the operation through the operation panel 6 and performs a necessary process based on the detected operation.
  • An interface 12 connects the receiver 2 and the PC 14. In this embodiment, although the Universal Serial Interface (USB) is used as the interface 12, other interfaces such as IEEE1394, RS-232C or the like can be used.
  • USB Universal Serial Interface
  • An input selector 3 selects audio signals (source signals) from various audio sources. For example, the input selector 3 selects one of input lines 21 to 24. In Fig.1, the MD player 15 is connected to the input line 23, and the cassette tape deck 16 is connected to the input line 24. Moreover, the receiver 2 has a tuner 17 therein, and so the input selector 3 can select output signals of the tuner 17.
  • the input selector 3 has a built-in analog to digital (D/A) converter, and the D/A converter converts analog signals input to the input selector 3 to digital signals.
  • the CPU 7 processes output signals of the input selector 3 in various ways (e.g., sound-field processing), and then the audio amplifier 4 amplifies the processed output signals.
  • FIG. 2 is a block diagram showing the structure of the audio amplifier 4 according to the embodiment of the invention.
  • the audio amplifier 4 has a digital to analog (D/A) converter 30, a signal selector 31, a power amplifier (an amplifier for loudspeakers) 33 and a headphone amplifier 32.
  • An output terminal of the power amplifier 33 is connected to a speaker output 5S.
  • An output terminal of the headphone amplifier 32 is connected to a headphone jack 5P.
  • the source signals processed by the CPU 7 are supplied to the D/A converter wherein the signals are converted to analog signals and are output to the signal selector 31.
  • the signal selector 31 supplies, under a control of the CPU 7, the analog output signals of the D/A converter 30 to either the headphone amplifier 32 or the power amplifier 33.
  • the headphone jack 5P has a headphone detector 35 for detecting whether a headphone is plugged-in or not.
  • This headphone jack 5P can have any structures that can detect plugging of a headphone. For example, when a headphone jack 5p has a mechanical contact that makes a contact with a headphone being plugged-off and vice versa. In that case, the mechanical contact will be a headphone detector 35 at the same time, and the CPU 7 detects plugging of a headphone by detecting on/off signals of the mechanical contact. In other cases, an individual mechanical contact that can detect the plugging of a headphone may be used as a headphone detector 35, or an optical device that can detect the plugging may be used. Moreover, the plugging of a headphone may be detected by detecting changes of impedance made by connecting a headphone to a circuit.
  • the CPU 7 performs 3D sound-field processes, such as a mixing process, suitable for reproducing sound from either loudspeakers or a headphone. That is, the process performed in the CPU 7 can be divided into two types; a headphone-mode process and a speaker-mode process. Programs for the processes are stored in the ROM 9.
  • the CPU 7 outputs a signal indicating a selected mode of 3D sound-field filtering process and a signal indicating which source signal (i.e., input line) is selected by the input selector 3 to the PC 14 through the interface 12.
  • a Program for this process is also stored in the ROM 9.
  • FIG. 3 is a diagram showing an example of a front panel (an operation panel) 6 of the audio system of the embodiment.
  • Audio signal source selectors 6a1 to 6a4 enables a user to select one audio signal source from external audio sources connected to input lines 21 to 24 and the built-in tuner 17.
  • a 3D sound-field filtering process selector 6b is a switch that enables a user to inactivate the sound-field filtering process, or to select a 3D sound-field filtering process for a headphone (a headphone mode) or a 3D sound-field filtering process for loudspeakers (a speaker mode).
  • a tuner registration switch 6c is for registering presets of radio channel selections. Up/down switches 6d and 6e are used for the tuner registration. A user can control master volume with a master volume 6f and turn on/off the power with a power switch 6g.
  • the headphone jack 5p is provided, as shown in the drawing, at the lower left corner of the front panel 6.
  • Aforesaid display 8 is provided, as shown in Fig. 3, on the front panel 6 and has a multi-function screen 8d, input indicators 8i1 to 8i4 and a power indicator 8p.
  • Each of the input indicators 8i1 to 8i4 is configured next to each of the corresponding audio signal source selectors 6a1 to 6a4.
  • the input indicators 8i1 to 8i4 are labeled, from top to bottom; "PC”, “AUX1”, “AUX2”, and "TUNER.”
  • Each of the input indicators 8i1 to 8i4 is illuminated when the corresponding input selector is operated, in order to indicate the selection of audio signal source.
  • audio signals output form an audio source selected by either one of the audio signal source selectors 6a1 to 6a4 to the bus 11 via the input selector 3.
  • the CPU 7 performs a 3D sound-field process to the input signals.
  • the CPU 7 checks the detection signal from the headphone detector 35 and performs the 3D sound-field filtering process for loudspeakers unless a headphone is detected. At the same time, the CPU 7 makes the signal selector 31 (Fig. 2) select the power amplifier 33. By the above, the selected source signals are processed by the 3D sound-field filtering process for loudspeakers and reproduced by loudspeakers (not shown) after being amplified by the power amplifier 33.
  • the CPU 7 shows the sign that indicates the 3D sound-field filtering process in progress is for loudspeakers onto the multi-functional screen 8d.
  • the sign may be text form, an icon or other graphical forms that can indicate what kind of process is in progress.
  • the CPU 7 outputs signals to the external PC 14 via the interface 12, the signals output by the CPU 7 include a signal indicating that the 3D sound-field filtering process for loudspeakers is in progress and a signal indicating what kind of source signals is selected.
  • the PC 14 displays information about the 3D sound field filtering process based on the signals supplied from the CPU 7.
  • FIG. 4 is a diagram showing an example of display by the PC 14 when the speaker mode is selected.
  • the PC 14 displays a screen, as shown in the drawing, reproducing the display on the front panel 6 on a display of the PC 14 by a software program.
  • Various displays are shown on the screen. For example, when the PC 14 is selected as an audio source, an indicator SI saying "PC" is illuminated or changed to another color, as shown in Fig. 4.
  • an icon showing that loudspeakers are selected for reproduction is displayed
  • a part SB an image showing 3D configuration of loudspeakers is displayed.
  • the CPU 7 performs the 3D sound-field filtering process for a headphone by receiving the headphone detection signal from the headphone detector 35. At the same time, the CPU 7 makes the signal selector 31 (Fig. 2) select the headphone amplifier 32.
  • the selected source signals are processed by the 3D sound-field filtering process for a headphone and reproduced by a headphone (not shown) after being amplified by the headphone amplifier 32.
  • the CPU 7 shows the sign that indicates the 3D sound-field filtering process in progress is for a headphone onto the multi-functional screen 8d.
  • the sign may be text form, an icon or other graphical forms that can indicate what kind of process is in progress.
  • the CPU 7 outputs signals to the external PC 14 via the interface 12, the signals output by the CPU 7 include a signal indicating that the 3D sound-field filtering process for a headphone is in progress and a signal indicating what kind of source signal is selected.
  • the PC 14, similar to the above, displays information about the 3D Sound-field filtering process based on the signals supplied from the CPU 7.
  • FIG. 5 is a diagram showing an example of display by the PC 14 when a headphone is plugged-in.
  • an icon showing that a headphone is selected for reproduction is displayed, and in a part SB, an image of a headphone and text "HP 3D" are displayed.
  • the 3D sound-field filtering process for a headphone is performed automatically upon a connection of a headphone.
  • both the operation panel 6 and the PC 14 display the information which 3D sound-field filtering process (speaker mode or headphone mode) is selected.
  • the 3D sound-field filtering process can be selected manually by operating the operation panel 6. That is, the 3D sound-field filtering process for a loudspeaker can be selected when a headphone is connected. In other word, the 3D sound-field filtering process for a headphone can be selected when loudspeakers are used for reproduction. Also, the 3D sound-field filtering process can be turned off by operating the 3D sound-field filtering process selector 6b.
  • the CPU 7 performs both the 3D sound field filtering process for a loudspeaker and the 3D sound-field filtering process for a headphone
  • this embodiment can be used in an audio system wherein the 3D sound-field filtering process is not performed for a loudspeaker output.
  • the 3D sound-field filtering process is automatically performed when a headphone is plugged-in, whereas the 3D sound-field filtering process is turned off when a headphone is plugged-off. Similar display used for indicating the headphone mode in the above embodiment can be used in this case.
  • supplying paths of source signals to the power amplifier 33 or to the headphone amplifier 32 are not limited to the embodiment.
  • Various kinds of the supplying paths can be configured if there is means for the 3D sound field processing within the paths.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Stereophonic System (AREA)
  • Stereophonic Arrangements (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Headphones And Earphones (AREA)
EP20000111950 1999-06-15 2000-06-15 Système audio avec processeur de champ sonore Expired - Lifetime EP1061774B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11169022A JP2000358294A (ja) 1999-06-15 1999-06-15 オーディオ音響装置
JP16902299 1999-06-15

Publications (3)

Publication Number Publication Date
EP1061774A2 true EP1061774A2 (fr) 2000-12-20
EP1061774A3 EP1061774A3 (fr) 2006-07-05
EP1061774B1 EP1061774B1 (fr) 2009-09-30

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EP20000111950 Expired - Lifetime EP1061774B1 (fr) 1999-06-15 2000-06-15 Système audio avec processeur de champ sonore

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EP (1) EP1061774B1 (fr)
JP (1) JP2000358294A (fr)
DE (1) DE60043038D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1416769A1 (fr) * 2002-10-28 2004-05-06 Electronics and Telecommunications Research Institute Système audio basé sur des objets tridimensionnels et méthode pour contrôler celui-ci
WO2007078347A1 (fr) * 2005-12-16 2007-07-12 Sony Ericsson Mobile Communications Ab Profils audio pour dispositif de lecture de musique portatif
US8165320B2 (en) 2003-11-21 2012-04-24 Samsung Electronics Co., Ltd. Audio/video device having a volume control function for external audio reproduction unit by using volume control buttons of a remote controller and volume control method therefor
RU2667630C2 (ru) * 2013-05-16 2018-09-21 Конинклейке Филипс Н.В. Устройство аудиообработки и способ для этого

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4517395B2 (ja) * 2005-03-23 2010-08-04 ヤマハ株式会社 電子楽器
US8705747B2 (en) 2005-12-08 2014-04-22 Electronics And Telecommunications Research Institute Object-based 3-dimensional audio service system using preset audio scenes
JP5586950B2 (ja) * 2006-05-19 2014-09-10 韓國電子通信研究院 プリセットオーディオシーンを用いたオブジェクトベースの３次元オーディオサービスシステム及びその方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0808075A2 (fr) 1996-05-17 1997-11-19 Central Research Laboratories Limited Système de reproduction audio

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06225243A (ja) * 1993-01-26 1994-08-12 Hitachi Ltd 音声出力切換回路
JPH1039869A (ja) * 1996-07-18 1998-02-13 Kawai Musical Instr Mfg Co Ltd 電子楽器

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0808075A2 (fr) 1996-05-17 1997-11-19 Central Research Laboratories Limited Système de reproduction audio

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1416769A1 (fr) * 2002-10-28 2004-05-06 Electronics and Telecommunications Research Institute Système audio basé sur des objets tridimensionnels et méthode pour contrôler celui-ci
US7590249B2 (en) 2002-10-28 2009-09-15 Electronics And Telecommunications Research Institute Object-based three-dimensional audio system and method of controlling the same
US8165320B2 (en) 2003-11-21 2012-04-24 Samsung Electronics Co., Ltd. Audio/video device having a volume control function for external audio reproduction unit by using volume control buttons of a remote controller and volume control method therefor
US8300866B2 (en) 2003-11-21 2012-10-30 Samsung Electronics Co., Ltd. Audio/video device having a volume control function for an external audio reproduction unit by using volume control buttons of a remote controller and volume control method therefor
US8300867B2 (en) 2003-11-21 2012-10-30 Samsung Electronics Co., Ltd. Audio/video device having a volume control function for an external audio reproduction unit by using volume control buttons of a remote controller and volume control method therefor
US8320594B2 (en) 2003-11-21 2012-11-27 Samsung Electronics Co., Ltd. Audio/video device having a volume control function for an external audio reproduction unit by using volume control buttons of a remote controller and volume control method therefor
WO2007078347A1 (fr) * 2005-12-16 2007-07-12 Sony Ericsson Mobile Communications Ab Profils audio pour dispositif de lecture de musique portatif
RU2667630C2 (ru) * 2013-05-16 2018-09-21 Конинклейке Филипс Н.В. Устройство аудиообработки и способ для этого

Also Published As

Publication number Publication date
DE60043038D1 (de) 2009-11-12
JP2000358294A (ja) 2000-12-26
EP1061774B1 (fr) 2009-09-30
EP1061774A3 (fr) 2006-07-05

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