JPH06339200A - Dsp equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] A vehicle-mounted DSP device capable of easily operating the modes and / or recognizing the operation results while providing a mode for switching between the case where the sound field is created by digital signal processing and the case where the sound field is not created. Offer of. [Structure] The digital signal processing unit 2 includes a first processing mode for performing sound field creation and balance processing, a second processing mode for performing only balance processing, and a third processing not performing sound field creation and balance processing. It has a mode and processes an input signal according to a processing mode based on a control signal from the control unit 5 and outputs the result. The adjustment unit 4 performs the amplification based on the output signal from the D / A converter and the adjustment based on the balance / fader operation by the user. The key portion 5 is provided with a user's selection input of a sound field, a processing mode selection input, a balance / fader operation input key, and the like. The control unit 6 discriminates the input signal from the key unit 5, determines the processing, generates the control signal, and controls the operations of the digital signal processing unit 2, the adjusting unit 4, the display unit 7, and the warning unit 8 by the control signal. Control. The display 7 displays a processing mode of the digital signal processing unit 2, a signal level is visually displayed, and the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound reproducing device, and more particularly to a DSP device for creating a sound field by digital signal processing.

[0002]

2. Description of the Related Art In recent years, as a sound reproducing device for reproducing music, a DSP device for generating a sound field by digital signal processing has been used. The DSP device converts a stereo signal obtained from a music medium into a digital signal, processes the digital signal to obtain a sound field generating signal and the like, converts the output signal into an analog signal, and reproduces the sound field.

[0003]

"Compactness", which is caused by a physical limitation in a narrow vehicle interior, in an on-vehicle audio device,
"Good operability" is required, as well as a variety of creation of atmosphere for enjoying music and high quality. If a DSP device is used as such an on-vehicle audio device, it can be simply created if a simple operation can be performed in addition to the reproduction accompanied by the sound field creation by digital signal processing and the case without the sound field creation. Satisfaction of users who want to obtain a more effective atmosphere by selecting a sound field is more satisfied, and it is expected that demand for vehicle-mounted DSP devices will increase.

The present invention has been made on the basis of the above-mentioned configuration, and provides a processing mode for switching between the case where the sound field is created by the digital signal processing and the case where it is not executed, and the operation / and the operation result of those processing modes. It is an object of the present invention to provide a vehicle-mounted DSP device capable of easily recognizing the above.

[0005]

In order to achieve the above object, the DSP device of the first invention is a digital signal processing section for inputting and processing each stereo component signal converted into a digital signal, and an instruction input. Means and a control portion for sending a control signal for controlling execution of a predetermined processing mode to the digital signal processing portion based on an input from the instruction input means, wherein the digital signal processing portion is a digital signal for the input signal. A first processing mode in which a sound field is created and localization correction processing is performed to obtain an output signal, a second processing mode in which only localization correction processing by digital signal processing is performed on an input signal to output, and an input signal In contrast to the third processing mode in which the sound field is created as it is by digital signal processing and is output as it is without performing localization correction processing, and based on the control signal,
One of the first processing mode, the second processing mode, and the third processing mode is executed for each stereo component signal.

A second aspect of the present invention is the DSP device according to the first aspect, further including a display section, and the control section at least the display data of the processing mode being executed, the sound field creation display data, and the localization correction. It is characterized in that the processed display data is sent to the display unit, and the display unit displays the display data.

A third invention is the above-mentioned first or second DSP.
The apparatus further includes an adjusting unit that amplifies the output signal from the digital signal processing unit and adjusts the output signal based on an adjustment instruction input from the instruction input unit to the adjusting unit by the control signal, and a warning unit. When the control unit is in the third processing mode, the control unit sends a control signal for prohibiting the adjustment instruction input from the instruction input unit to the adjustment unit, and the adjustment instruction input from the instruction input unit to the adjustment unit is received. When there is, a control signal for instructing a warning operation is sent to the warning unit.

[0008]

In order to achieve the above object, the DS of the first invention
In the P apparatus, the digital signal processing unit performs the sound field creation and localization correction processing by the digital signal processing on the input signal in the first processing mode to obtain the output signal. Further, in the second processing mode, only the localization correction processing by the digital signal processing is performed on the input signal and the input signal is output. Further, in the third processing mode, the input signal is output as it is without being subjected to sound field creation and localization correction processing by digital signal processing. Then, based on the control signal from the control unit, one of the first processing mode, the second processing mode, and the third processing mode is executed for each stereo component signal.

According to a second aspect of the present invention, in the DSP device of the first aspect, the control section further displays at least display data of a processing mode being executed, sound field creation display data, and localization correction processing display data. And the display unit displays the display data.

A third invention is the above-mentioned first or second DSP.
In the apparatus, the adjustment unit further amplifies the output signal from the digital signal processing unit, and adjusts the output signal based on the adjustment instruction input from the instruction input unit to the adjustment unit by the control signal. In the processing mode, the control signal for prohibiting the adjustment instruction input from the instruction input means to the adjustment portion is sent to the adjustment portion, and the warning portion is warned when the adjustment instruction input from the instruction input means to the adjustment portion is received. A control signal for instructing the operation is sent out, and the warning section obtains the control signal and emits a warning sound.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a vehicle-mounted DS as an embodiment of the present invention.
1 is a block diagram showing a configuration of a P (Digital Signal Processor) device, 1 is an A / D converter, 2 is a digital signal processing unit, 3 is a D / A converter, 4 is an adjusting unit, 5 is a key unit, and an instruction input 6 is a control unit, 7 is a display unit, and 8 is a warning unit.

In FIG. 1, an A / D converter 1 converts a stereo signal (L channel, R channel) into a digital signal and inputs it to a digital signal processing section 2. The digital signal processing unit 2 has three processing modes (described later (see FIG. 2)), processes the input signal according to the processing mode based on the control signal from the control unit 5, and outputs the result (digital output signal). Output.

The D / A converter 3 converts the output signal of the digital signal processing unit 2 into an analog signal and outputs it as a front output signal (L channel, R channel) and a rear output signal (L channel, R channel). The adjusting section 4 amplifies the output signal from the D / A converter and adjusts it based on the balance / fader operation by the user, and outputs it as a front output and a rear output. The key portion 5 is provided with a plurality of keys for performing a sound field creation instruction (selection input of creation sound field) by the user, selection input of processing mode, balance / fader operation input, etc., and an operation panel (not shown). It is provided above.

The control unit 6 determines what the input from the key unit 5 is, determines the processing, and controls the operations of the digital signal processing unit 2, the adjusting unit 4, the display unit 7, and the warning unit 8 by the control signal. In addition, the display unit 7 displays the digital signal processing unit 2
Sends display data to the display unit 7 for displaying the processing mode being executed, displaying the type of sound field to be created, displaying whether or not localization correction is being executed, and the like. The display unit 7 displays the processing mode of the digital signal processing unit 2, the signal level is visually displayed, and the like.

In the warning unit 8, the digital signal processing unit is a DSP /
An inappropriate operation by the user in the PASS mode (described later) (for example, the mode adjustment unit 4 in the DSP / PASS mode).
It is provided in order to make the user easily recognize the current playback status (for example, being in the DSP / PASS mode) by issuing a warning sound (Beep sound) when performing the balance / fader operation in. There is.

FIG. 2 is an explanatory view of a processing mode of the digital signal processing unit 2. (1) FIG. 2A shows sound field creation and balance processing (localization correction processing) for an input signal by digital signal processing. FIG. 2B shows a DSP / ON mode (first processing mode) of performing and outputting, and (2) FIG. 2B shows a DSP / OFF mode (second processing) of performing only balance processing by digital signal processing on an input signal and outputting. Processing mode)
FIG. 2C shows a DSP / PASS mode (third processing mode) in which the input signal is output as it is without performing sound field creation and balance processing by digital signal processing.

FIG. 3 is a flowchart showing an operation example of the control unit. The operation of the control unit will be described below with reference to FIG. [S1] Whether or not there is a key input from the key unit 5 is determined. [S2] If there is a key input, it is determined whether or not it is a processing mode switching key input of the digital signal processing unit 2,
If the processing mode selection key is input, step S3 is executed. If not, step S10 is executed. [S3] Currently, the digital signal processing unit 2 is DSP / ON
It is determined whether or not the mode. In the case of the DSP / ON mode, step S4 and subsequent steps are executed, and otherwise, the determination in step S7 is performed. [S4] A DSP / OFF instruction signal (control signal) and display data are generated. [S5] A control signal is sent to the digital signal processing unit 2. As a result, the digital signal processing unit 2 executes the processing mode indicated by the control signal.

[S6] The display data is sent to the display unit 7 and the process returns to step S1 to wait for the next key input. As a result, the display unit 7 displays the processing mode as shown in FIG. [S7] Currently, the digital signal processing unit 2 is a DSP / OF.
It is determined whether or not the F mode. [S8] DSP / PA in case of DSP / OFF mode
An SS instruction signal (control signal) and display data are generated, and steps S5 and S7 are executed. [S9] DSP / OFF if not in DSP / OFF mode
An ON instruction signal (control signal) and display data are generated, and steps S5 and S7 are executed. [S10] It is determined whether or not the balance / fader key is input, and in the case of the balance / fader key input, step S11.
The following is executed, and if not, the determination in step S13 is performed.

[S11] Currently, the digital signal processing unit 2
Determines whether the device is in the DSP / PASS mode,
In the ASS mode, the process returns to step S1 to wait for the next key input. [S12] If not in the DSP / PASS mode, a balance / fader operation prohibition canceling signal (control signal) is generated and sent to the adjusting section 4, and the process returns to step S1 to wait for the next key input. In this case, the user can
Balance of the adjustment unit 4 by the fader operation prohibition release signal /
You can operate the fader. [S13] It is determined whether or not the DSP-related key input is made and the DSP
In the case of the related key input, step S14 and subsequent steps are executed, otherwise, the process returns to step S1 and waits for the next key input. [S14] Currently, the digital signal processing unit 2 is DSP / P
It is determined whether or not it is in the ASS mode.

[S15] Balance / fader operation prohibition release signal (control signal) in the case of DSP / PASS mode
And a warning operation instruction signal (control signal) are generated and sent to the adjusting unit 4 and the warning device 8 and the process returns to step S1 to wait for the next key input. The adjustment unit 4 uses the balance from the control unit 6
Even if the user performs the balance / fader operation from the key section 5 by the fader operation prohibition signal, the adjusting section 4 does not perform the balance / fader adjustment. In addition, the warning device 8 emits a warning sound (Beep sound) when the user presses the balance / fader operation key on the key unit 5 in response to a warning operation instruction signal from the control unit 6, and a digital signal is sent to the user at present. The signal processing unit 2 is made to recognize that the DSP / PASS mode is being executed and the operations such as balance / fader are prohibited.

[S16] When not in the DSP / PASS mode, a DSP-related processing instruction signal such as a sound field creation parameter of the DSP is sent, and the process returns to step S1 to wait for the next key input.

FIG. 4 shows an example of display of each processing mode on the display unit 7, and FIG. 4A shows an example of display during execution of the DSP / ON mode or DSP / OFF mode.
(B) is a display example during execution of the DSP / PASS mode. In FIG. 4, 41 is a spectrum display for displaying the signal level of each band component signal of the audio signal, 42 is a processing mode display, and the current processing mode is DSP / ON mode in FIG. 4A. Means "DSP
The character "ON" is displayed, and the character "DSP PASS" which means that the current processing mode is the DSP / PASS mode is displayed in FIG. 4B.

Reference numeral 43 denotes a sound field creation display. In FIG. 4 (a), the character "HALL" indicating that the HALL function for creating the playing state in the hall is being executed is displayed, but the DSP / PASS is displayed. Since the sound field is not created in the mode, a space is displayed in FIG. 4 (b).

Reference numeral 44 denotes a localization correction processing display, which is shown in FIG.
An icon indicating that the localization correction process is being executed is displayed in (a), but since the localization correction process is not performed in the DSP / PASS mode, a space is displayed in FIG. 4 (b). The display of the display unit 7 allows the user to visually recognize which processing mode the digital signal processing unit 2 is currently executing.

FIG. 5 is a flowchart showing an example of the control operation of the control section 6 regarding the display operation of the sound field creation display 43 and the localization correction processing display 44. In Fig. 5, sound field creation display and localization correction processing display are performed in SP / ON mode, and DS
The sound field creation display and the localization correction processing display are not performed except in the P / ON mode.

[0026]

As described above, the vehicle-mounted DS of the present invention
According to the P device, it is possible to switch the processing mode by a simple key operation and perform a comparative audition of the signal processing results. Also,
Without disturbing the balance of the level recorded by the music medium by prohibiting the adjustment operation in the third processing mode in which the input signal is output as it is without performing the sound field creation and balance processing by digital signal processing, Can play music. Further, although signal processing is not performed in the third processing mode, it is possible to make the user perceptually (audiovisually) recognize it by a warning and display.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a vehicle-mounted DSP device as an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a processing mode of a digital signal processing unit.

FIG. 3 is a flowchart showing an operation example of a control unit.

FIG. 4 is an example of display of each processing mode on a display unit.

FIG. 5 is a flowchart showing an example of control operation of a control unit relating to sound field creation display and localization correction processing display.

[Explanation of Codes] 2 Digital Signal Processing Section 4 Adjustment Section 5 Key Section (Instruction Input Means) 6 Control Section 7 Display Section 8 Warning Sound

Claims (3)

[Claims] 1. A digital signal processing unit for inputting and processing each stereo component signal converted into a digital signal, an instruction input unit, and a predetermined unit for the digital signal processing unit based on an input from the instruction input unit. A control unit for transmitting a control signal for controlling the execution of the processing mode; and wherein the digital signal processing unit obtains an output signal by performing sound field creation and localization correction processing on the input signal by digital signal processing. No. 1 processing mode, the second processing mode which outputs only the localization correction processing by the digital signal processing for the input signal, and the creation of the sound field and the localization correction processing by the digital signal processing for the input signal A third processing mode for outputting as it is, and a first processing mode and a second processing mode for each stereo component signal based on the control signal. Or third
DS, characterized by executing any of the processing modes
P device. 2. The DSP device according to claim 1, further comprising a display unit, wherein the control unit displays at least display data of a processing mode being executed, sound field generation display data, and localization correction processing display data. A DSP device, wherein the DSP device sends the display data to a display unit, and the display unit displays the display data. 3. The DSP device according to claim 1 or 2, further comprising: amplifying an output signal from the digital signal processing unit, and outputting the output signal based on an adjustment instruction input from an instruction input unit to an adjustment unit by a control signal. And a warning unit, wherein the control unit sends to the adjustment unit a control signal for prohibiting the adjustment instruction input to the adjustment unit from the instruction input means in the third processing mode. In addition, the DSP device sends a control signal for instructing a warning operation to the warning unit when an adjustment instruction is input to the adjustment unit from the instruction input means.