JP2006186534A - Acoustic apparatus, control method thereof, control program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an acoustic apparatus capable of revising a connection configuration of speakers and properly setting a mixing destination of a second sound such as a guide sound in matching with the connection configuration of the speakers, and to provide a control method thereof, a control program, and a recording medium. <P>SOLUTION: A DSP 140 revises a mixing destination of the guide sound signal SA2 in a mixing section 142 to a sound signal corresponding to a sound output being an output destination of a middle sound frequency sound among sound outputs OUT1 to 3 in response to selected setting information. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an acoustic device having a plurality of audio outputs, a control method thereof, a control program, and a recording medium.

Conventionally, a main voice signal (first voice signal) generated from music data read from a CD (Compact Disc) or the like is mixed with a voice signal (second voice signal) of guidance voice from a car navigation device and output. A vehicle-mounted acoustic device is known (see, for example, Patent Document 1).
This type of sound device has a plurality of sound outputs, and each sound output is for high sound range (for tweeter), medium sound range (for mid range speaker or full range speaker), and low sound range (for woofer). In addition, there are dedicated ones for 3WAY, and dedicated ones for 5.1ch each audio output is for center (1ch), front (2ch), rear (2ch), and woofer (1ch).
JP 2001-34281 A

However, in the conventional configuration, each audio output is fixed to 3WAY exclusive use or 5.1 exclusive use. For example, when a tweeter is previously installed in the vehicle, this tweeter is set to 5.1. If it is connected to one of the audio outputs of a dedicated in-vehicle acoustic device, there is almost no sound from the tweeter, and the tweeter may be damaged, and the tweeter cannot be used.
In addition, in the conventional configuration, the mixing destination of the guidance voice is also fixed. Therefore, if a tweeter is connected to the voice output destination of the guidance voice, the guidance voice is hardly emitted or is difficult to hear.
For this reason, in the conventional configuration, if the speaker connection configuration of the vehicle is changed from, for example, the 3WAY configuration to the 5.1ch configuration or the like, the acoustic device must be replaced.

  The present invention has been made in view of the above-described circumstances, and the connection configuration of speakers can be changed, and a second audio mixing destination such as a guidance voice can be appropriately selected according to the connection configuration of the speakers. An object of the present invention is to provide an audio device that can be set, a control method thereof, a control program, and a recording medium.

  In order to solve the above-described problems, the present invention has a plurality of audio outputs, and outputs from each audio output a plurality of channels of first audio signals corresponding to the first audio, and a predetermined channel of the first audio signal. In addition, in the acoustic device that mixes the second audio signal corresponding to the second audio including the mid-range audio, a plurality of information including information specifying an output destination of the audio signal including the mid-range audio among the plurality of audio outputs Setting information is stored in advance, and based on the setting information selected from among the plurality of setting information, the second audio signal is selected from among the first audio signals of the plurality of channels. An audio processing means for mixing the audio signal output to the output destination is provided.

  According to the present invention, among the plurality of sound outputs, the plurality of setting information including information for specifying the output destination of the sound signal including the mid-range sound is stored in advance, and the second sound is based on the selected setting information. Since the signal is mixed with the audio signal output to the output destination of the audio signal including the mid-range audio among the first audio signals of the plurality of channels, the mixing destination of the second audio signal is surely set to the mid-range audio. It can be made into a signal and sound can be emitted from a speaker that can reproduce mid-range sound.

  In the above configuration, the audio processing unit may set the output destination of each of the first audio signals of the plurality of channels based on the selected setting information. Further, the setting information may further include information for specifying at least one of an output destination of an audio signal including high-frequency sound and an output destination of an audio signal including low-frequency sound.

In the case where the acoustic device is an on-vehicle acoustic device disposed in a vehicle, the sound processing unit converts the second sound signal into the first sound signal of the plurality of channels based on the selected setting information. Of these, it may be mixed with an audio signal that is an output destination of an audio signal including mid-range audio and is output to an audio output corresponding to a speaker near the driver's seat of the vehicle.
Further, the audio processing means preferably mixes the second audio signal with the first audio signal by software processing, and a digital signal processor may be applied.

  In addition, the present invention has a plurality of audio outputs, and outputs each of the first audio signals of a plurality of channels corresponding to the first audio from each audio output, and outputs the first audio signal of a predetermined channel to the first audio signal of a predetermined channel. In the control method of the acoustic device for mixing the second sound signal corresponding to the second sound including the plurality of setting information including information for specifying an output destination of the sound signal including the mid-range sound among the plurality of sound outputs Based on any of the above, the second audio signal is mixed with an audio signal output to an output destination of an audio signal including mid-range audio among the first audio signals of the plurality of channels.

  In addition to being applied to the above-described acoustic apparatus and its control method, the present invention distributes a control program for carrying out the present invention to general users via an electric communication line, and distributes such a program as a magnetic program. The present invention can also be implemented in such a manner that it is stored in a computer-readable recording medium such as a recording medium, an optical recording medium, or a semiconductor recording medium and distributed to general users.

  In the present invention, the speaker connection configuration can be changed, and the second audio mixing destination such as the guidance voice can be appropriately set in accordance with the speaker connection configuration.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a car audio device 1 which is an aspect of an in-vehicle device according to the present embodiment, and FIG. 2 is a front view of a device main body 2 of the car audio device 1. As shown in FIG. 1, a detachable control panel (hereinafter referred to as DCP (Detachable Control Panel) 3) 3 is detachably attached to the front surface (front portion) of the car audio device 1. .

The DCP 3 functions as a display unit and an operation unit of the car audio device 1, and includes a DCP case 4, a liquid crystal panel 5, a touch panel 6 provided on the liquid crystal panel 5, and both left and right sides of the liquid crystal panel 5. And a plurality of operation keys 7 arranged in the.
Upper and lower edges of the liquid crystal panel 5 are provided with an upper frame 8A and a lower frame 8B, and the liquid crystal panel 5 is sandwiched between the upper frame 8A and the lower frame 8B. In addition, four recesses 9 are formed in the lower frame 8 </ b> B at substantially equal intervals along a portion adjacent to the liquid crystal panel 5. These recesses 9 are used to guide the operation locations on the touch panel 6. That is, as shown in FIG. 1, the liquid crystal panel 5 has four operation button icons 10 corresponding to the four recesses 9. When the user slides his / her finger on the lower frame 8 </ b> B, the position of the operation button 10 displayed on the liquid crystal panel 5 can be observed from the position of the recess 9. Therefore, the user can easily operate the touch panel 6 without looking at the liquid crystal panel 5.

Furthermore, as shown in FIG. 1, guide pieces 11 extending vertically are provided on both the left and right edges of the liquid crystal panel 5, and these guide pieces 11 are touch panels similar to the recesses 9 of the lower frame 8 </ b> B. 6 Guidance of the operation location.
Specifically, as shown in FIG. 1, scroll operation icons 12 for sequentially changing display items displayed on the liquid crystal screen 5 are displayed near the left and right edges of the liquid crystal panel 5, and the user guides The scroll operation icon 12 can be operated by relying on the piece 11. That is, when the user slides on the touch panel 6 with the finger along the guide piece 11, the scroll operation icon 12 is operated, and the display items are sequentially changed.

As described above, the DCP 3 includes a plurality of operation keys 7. As these operation keys 7, a power / volume key (volume controller) 7A, a source button 7B, an open / eject button 7C, an adjustment button 7D, A mode button 7E, a sound button 7F, and an ISR button 7G are provided.
The power / volume key 7A is configured as a rotary key switch, and the power is turned on / off by a pressing operation, and the volume (volume) is adjusted by a rotating operation. The source button 7B is a push button for switching the sound source, and the sound source to be reproduced is switched each time the button is pressed. As a sound source, a radio sound source or a CD (Compact Disc) sound source built in the apparatus main body 2, a CD changer or a DVD (Digital Versatile Disk) changer connected to the apparatus main body 2 so as to be communicable, and an external audio input terminal It is an external voice to be input (in this embodiment, a guidance voice from the car navigation device 200).

The open / eject button 7C is a push button for opening the DCP 3. When the open / eject button 7C is pressed in a state where the DCP 3 is closed, the DCP 3 is pushed out from the apparatus main body 2 by a link mechanism (not shown). The device body 2 is opened and the front surface (front portion) of the apparatus main body 2 is exposed.
As shown in FIG. 2, a CD insertion slot 20 is provided in the front of the apparatus main body 2, and the CD can be inserted into and removed from the apparatus main body 2 by opening the DCP 3. When the open / eject button 7C is operated with the DCP 3 opened, the CD is ejected from the insertion slot 20. When the DCP 3 is in an open state, a link mechanism (not shown) is activated after a predetermined time and automatically closes.

  The adjustment button 7D is an operation button used when various settings and adjustments of the apparatus main body 2 are performed. The mode button 7E is, for example, a push button for setting a playback mode at the time of CD playback. Each time the button is pressed, a playback mode such as repeat playback or random playback is switched and set. When the mode button 7E is pressed for a long time, the display on the liquid crystal panel 5 is switched between the standard display and the simple display that improves the visibility by omitting the design. The sound button 7F is an operation button used when performing various settings and adjustments related to sound. The ISR button 7G is an operation button for receiving a specific radio channel and outputting radio sound regardless of the current selection state of the sound source.

  In addition, a light receiving window 13 of a photosensor for sensing the brightness of the passenger compartment and a light receiving window 14 for receiving a signal from a remote controller are provided in front of the DCP 3. In the car audio apparatus 1, the brightness of the backlight of the liquid crystal panel 5 is adjusted according to the brightness of the vehicle interior sensed by the photosensor (so-called auto dimmer function).

  As described above, the DCP 3 can be detached from the apparatus main body 2. The structure of the DCP 3 will be described below. As shown in FIG. 3, two engagement protrusions 30A, 30B and one An engagement receiver 31 and a connector contact 32 are formed. As shown in FIG. 2, a support plate 21 for attaching the DCP 3 is provided on the front surface of the apparatus body 2, and this support plate is provided. Two engagement receivers 22 </ b> A and 22 </ b> B, one engagement protrusion 23, and a connector contact 24 are formed on 21. Under this configuration, the engagement receiver 31 on the back surface of the DCP 3 is pushed into the engagement protrusion 23 on the support plate 21 of the apparatus main body 2, and one end side of the DCP 3 is engaged with the apparatus main body 2. The DCP 3 is detachably attached to the front surface of the apparatus main body 2 by pushing the engagement protrusions 30A and 30B and the connector contact 32 into the engagement receivers 22A and 22B and the connector contact 24 of the apparatus main body 2, respectively. .

  When the DCP 3 is attached to the apparatus main body 2, signals can be transmitted and received between the DCP 3 and the apparatus main body 2 via the connector contacts 32 and 24, and between the DCP 3 and the apparatus main body 2. An operation signal corresponding to the operation of the operation key 7, a signal for displaying various information on the liquid crystal panel 5, and the like are transmitted and received.

Next, the functional configuration of the car audio device 1 will be described with reference to FIG. FIG. 4 is a block diagram showing a functional configuration of the device main body 2 and the DCP 3 of the car audio device 1. As shown in this figure, the device main body 2 of the car audio device 1 includes a master microcomputer (control unit) 100, a radio reception unit 110, a CD playback unit 120, and an audio output unit 130.
The master microcomputer 100 executes control of each part of the apparatus main body 2 and the DCP 3, and has a built-in storage means such as an EEPROM or a RAM. The EEPROM stores various display data such as a control program and a menu screen. Stored. Although not shown, the master microcomputer 100 is supplied with a backup power source directly connected to the vehicle battery and an ACC power source connected to the battery via a key switch. Therefore, while the ACC power is off, backup power is supplied to the master microcomputer 100 and data stored in the RAM or the like is retained.

  The radio receiving unit 110 receives an AM / FM wave radio broadcast, and includes an antenna 111 and a tuner circuit 112. The tuner circuit 112 receives a radio broadcast of a predetermined channel based on an instruction from the master microcomputer 100. Then, the audio signal is output to the audio output unit 130. The CD playback unit 120 includes a CD reading unit 121 that reads music data recorded on a CD and outputs an audio signal to the audio output unit 130 under the control of the master microcomputer 100.

The audio output unit 130 controls the analog audio signal SA1A (corresponding to the audio signal of the main audio) supplied from the radio receiving unit 110 and the digital signal supplied from the CD reproducing unit 120 under the control of the master microcomputer 100. A digital audio signal is generated and output from SA1B (corresponding to the audio signal of the main audio), and the audio signal (second signal) supplied from the external audio input terminal IN to the digital audio signal is supplied to the digital audio signal. The audio signal (hereinafter referred to as “guidance audio signal”) SA2 is mixed and output.
The audio output unit 130 includes an A / D conversion unit 131. The A / D conversion unit 131 converts the audio signal SA1A and the guidance audio signal SA2 into digital audio signals and converts them into a DSP (digital signal processor). Output to 140.

  The DSP (audio processing means) 140 performs digital processing on the digital audio signal of the main audio (first audio) by software processing under the control of the master microcomputer 100 to provide a plurality of channels (up to 6 channels in this embodiment). A digital audio signal (first audio signal) is output. Roughly speaking, a stereo or monaural digital audio signal from each input source (CD or radio) is converted into a multi-channel, and a volume is set. A decoding unit (first audio processing unit) 141 that performs control processing and the like, and a mixing unit (second audio processing unit) 142 that mixes the guidance audio signal SA2 into a digital audio signal of a predetermined channel are configured. Yes.

  The maximum number of channels of the digital audio signal is the same as the number of outputs of the three-channel audio outputs OUT1 to OUT3 (two outputs for each audio output) included in the car audio device 1, and these audio outputs OUT1 to OUT3 include The speakers SP1L, SP1R, SP2L, SP2R, SP3L, and SP3R are connected via the external amplifier unit 160, respectively. Hereinafter, these speakers SP1L, SP1R, SP2L, SP2R, SP3L, and SP3R will be referred to as speakers SP when there is no need to distinguish them.

In the present embodiment, the DSP 140 includes a plurality of types of decoding processes performed by the decoding unit 141, and the master microcomputer 100 instructs which decoding process to execute.
The master microcomputer 100 stores a plurality (four in this embodiment) of setting information P1 to P4 indicating speaker connection configurations for specifying the decoding process in the EEPROM, and the setting information P1 to P4 includes the setting information P1 to P4. As shown in FIG. 5, the correspondence relationship between the audio outputs OUT1 to OUT3 indicating different speaker connection configurations and speaker types is described.
Here, the speaker type is information indicating the reproducible frequency range and arrangement position of the speaker. In FIG. 5, the tweeter is “HIGH”, the middle range speaker (including a full range speaker) is “MID”, and the subwoofer is “SUB WOOFER or SW”, the front speaker is “FRONT”, the rear speaker is “REAR”, and the center speaker is “CTR”.

More specifically, as shown in FIG. 6A, the setting information P1 indicates that the output destination of the audio output OUT1 (speakers SP1L and SP1R) is tweeter (HIGH2ch) and the output destination of the audio output OUT2 (speakers SP2L and SP2R). A 3WAY configuration in which the front speakers (MID2ch) and the output destinations (speakers SP3L and SP3R) of the audio output OUT3 are subwoofers (SUB WOOFER2ch) is shown. In the figure, symbol X is the driver's seat of the vehicle, symbol Y is the passenger seat, and symbol Z is the rear seat.
Further, as shown in FIG. 6B, the setting information P2 includes the output destination SP1L and SP1R of the audio output OUT1, the tweeter (HIGH2ch), the output destinations SP2L and SP2R of the audio output OUT2, the front speaker (MID2ch), and the audio output. A 2-way configuration in which the output destinations SP3L and SP3R of OUT3 are rear speakers (REAR) is shown.

Further, as shown in FIG. 6C, the setting information P3 includes the output destinations SP1L and SP1R of the audio output OUT1 as front speakers (FRONT2ch), the output destinations SP2L and SP2R of the audio output OUT2 as surround speakers (REAR2ch), and audio. A 5.1 channel configuration in which output destinations SP3L and SP3R of the output OUT3 are a center speaker and a subwoofer (CTR + SW) is shown.
In addition, as shown in FIG. 6D, the setting information P4 includes the output destination SP1L and SP1R of the audio output OUT1 as front speakers (FRONT2ch), the output destination SP2L and SP2R of the audio output OUT2 as rear speakers (REAR2ch), and audio. A standard configuration in which the output destinations SP3L and SP3R of the output OUT3 are subwoofers (SW2ch) is shown.

  Then, any one of the setting information P1 to P4 is selected by the user operating the DCP 3, and when this selection is performed, the master microcomputer 100 follows the selected setting information with respect to the DSP 140. Instructs execution of decoding processing or the like.

Under the control of the master microcomputer 100, the electronic volume circuit 132 performs D / A conversion on the digital audio signals of a plurality of channels output from the DSP 140 in order to adjust the playback volume in conjunction with the power / volume key 7A. Are adjusted and output to the audio outputs OUT1 to OUT3.
The external amplifier unit 160 is connected to the audio outputs OUT1 to OUT3 of the car audio apparatus 1 via an audio cable, amplifies each audio signal output from the audio outputs OUT1 to OUT3, and outputs the amplified audio signal to the external amplifier unit 160. The connected speaker SP is driven. Note that an amplifier circuit may be built in the apparatus main body 2 so that sound can be output without using the external amplifier unit 160.

Next, an operation after setting information is set will be described. Hereinafter, a description will be given by taking CD playback as an example.
When the setting information P1 is selected, when the signal SA1B is input from the CD reading unit 121 to the decoding unit 141 of the DSP 140, the decoding unit 141 generates a stereo (L, R) digital audio signal from the digital signal SA1B. Then, a decoding process associated with the setting information P1 is performed, and by this decoding process, a 6-channel digital audio signal composed of a high-frequency component, a mid-frequency component, and a low-frequency component of a stereo digital audio signal is generated.
Here, when the guidance voice signal SA2 is not inputted, the decoding unit 141 outputs the voice guidance signal SA2 as it is without performing the volume adjustment process on the six-channel voice signal (the voice adjustment process is invalid). If so, the decoding unit 141 performs volume adjustment processing for attenuating the volume level to a predetermined attenuation level on the 6-channel audio signal, and outputs the audio signal after level attenuation.

When the guidance voice signal SA2 is not input, the mixing unit 142 outputs the six-channel voice signals as they are (mixing processing invalid state).
When the guide voice signal SA2 is input, the mixing unit 142 converts the guide voice signal SA2 after A / D conversion into the mid-range voice described in the setting information P1 among the six-channel voice signals. The audio signal corresponding to the audio output OUT2 that is the output destination (MID) is mixed and output.
The audio signals output from the DSP 140 are amplified by the electronic volume circuit 132 at an amplification factor corresponding to the volume set by the volume key 7A, and then output from the audio outputs OUT1 to OUT3.

  In this case, a sound signal in the high sound range is output from the sound output OUT1, a sound signal in the middle sound range is output from the sound output OUT2, and a sound signal in the low sound range is output from the sound output OUT3. For this reason, in the case of the speaker connection configuration shown in FIG. 6A, high-frequency audio signals are output to the tweeters SP1L and SP1R, mid-range audio signals are output to the front speakers SP2L and SP2R, and low-frequency audio signals are output. Is output to the subwoofers SP3L and SP3R. As a result, each speaker SP is driven with an audio signal that matches the reproducible frequency range of each speaker SP shown in FIG.

Further, in this case, since the guidance voice signal SA is mixed with the voice signal corresponding to the voice output OUT2, as shown in FIG. 6 (A), the midrange can be reproduced and is arranged near the driver's seat X. The guidance voice is emitted from the front speakers SP2L and SP2R.
When the setting information P1 or the setting information P2 to P4 described below is selected, the guidance sound may be emitted only from the front speaker SP2R located closest to the driver's seat X.

When the setting information P2 is selected, the decoding unit 141 performs a decoding process corresponding to the pattern P2, and by this decoding process, a high-frequency component, a mid-frequency component, or a mid-low frequency component (for front and rear components, respectively) The pattern P1 is the same as that of the pattern P1 except that a 6-channel digital audio signal is generated.
In this case, a sound signal in the high sound range is output from the sound output OUT1, and a sound signal in the middle sound range or the middle low sound range (for front and rear) is output from the sound outputs OUT2 and OUT3.
For this reason, in the case of the speaker connection configuration shown in FIG. 6B, a high-frequency audio signal is output to the tweeters SP1L and SP1R, and a mid-range or mid-low range audio signal is output from the front speakers SP2L and SP2R and the rear speakers SP3L, Each speaker SP is driven by an audio signal that is output to the SP3R and matches the reproducible frequency range of each speaker SP.

  Further, in this case, when the guidance voice signal SA2 is input, the mixing unit 142 selects the guidance voice signal SA2 after A / D conversion as described in the setting information P2 among the six-channel voice signals. The sound signal corresponding to the sound output OUT2 that is the output destination (MID) of the sound range sound is mixed and output. Thereby, even in the case of the speaker connection configuration shown in FIG. 6B, the guidance voice is emitted from the front speakers SP2L and SP2R in the vicinity of the driver's seat X.

When the setting information P3 is selected, the decoding unit 141 performs a decoding process corresponding to the pattern P3. By this decoding process, the high-frequency component and the middle-frequency component (front and rear ( This is the same as the case of the pattern P1 except that a 6-channel digital audio signal composed of low-frequency components is generated for each of the surround) and the center).
In this case, the audio outputs OUT1 and OUT2 each output a mid-range or mid-high range (front and rear) audio signal, and one of the two outputs of the audio output OUT3 has a mid-range ( The center audio signal is output, and the other output is a low frequency audio signal.
For this reason, in the case of the speaker connection configuration shown in FIG. 6C, a mid-range or mid-high range audio signal is output to the front speakers SP1L, SP1R, surround speakers SP2L, SP2R, and center speaker SP3L, and a low-range audio signal is output. Is output to the subwoofer SP3R, and each speaker SP is driven by an audio signal that matches the reproducible frequency range of each speaker SP.

  Also, in this case, when the guidance voice signal SA2 is input, the mixing unit 142 uses the guidance voice signal SA2 after A / D conversion as described in the setting information P3 among the six-channel voice signals. The sound signal corresponding to the sound output OUT1 which is one of the output destinations (FRONT, REAR, CTR) of the sound range sound is mixed and output. Thereby, even in the case of the speaker connection configuration shown in FIG. 6C, guidance voices are emitted from the front speakers SP1L and SP1R in the vicinity of the driver's seat X.

When the setting information P4 is selected, the decoding unit 141 performs a decoding process corresponding to the pattern P4. By this decoding process, the mid-range or middle-high range component (front and rear components) of the stereo digital audio signal is obtained. Each) is the same as the case of the pattern P3 except that a 6-channel digital audio signal composed of low frequency components is generated.
In this case, a sound signal in the middle sound range or middle and high sound range (for front and rear) is output from the sound outputs OUT1 and OUT2, respectively, and a sound signal in the low sound range is output from the sound output OUT3.
For this reason, in the case of the speaker connection configuration shown in FIG. 6 (D), mid-range or mid-high range audio signals are output to the front speakers SP1L, SP1R and rear speakers SP2L, SP2R, and low-range audio signals are output from the subwoofer SP3L. Each speaker SP is driven by an audio signal that is output to SP3R and matches the reproducible frequency range of each speaker SP.

  Further, in this case, when the guidance voice signal SA2 is input, the mixing unit 142 uses the guidance voice signal SA2 after A / D conversion as described in the setting information P4 among the six-channel voice signals. The sound signal corresponding to the sound output OUT1 which is one of the output destinations (FRONT, REAR) of the sound range sound is mixed and output. Thereby, even in the case of the speaker connection configuration shown in FIG. 6D, guidance voices are emitted from the front speakers SP1L and SP1R in the vicinity of the driver's seat X.

By the way, when the guidance voice signal SA2 is input, the guidance voice signal SA is mixed into a digital voice signal of a predetermined channel in the DSP 140 and output to the electronic volume circuit 132. -If the volume level is adjusted according to the operation of the volume key 7A, the volume level of the guidance voice is also adjusted, and the guidance voice may be output at a low volume, making it difficult to hear.
Therefore, in the present embodiment, when the guidance voice signal SA is input, the volume of only the main voice is variably controlled by the DSP 140 instead of variably controlling the volume by the electronic volume circuit 132.

FIG. 7 is a flowchart showing the sound volume control process.
First, the master microcomputer 100 determines whether or not the guidance voice signal SA2 is input (step ST1). When the master microcomputer 100 determines that the guidance voice signal SA2 is input (step ST1: YES), the master microcomputer 100 performs the volume control process by the decoding unit 141 of the DSP 140 and invalidates the volume control by the electronic volume circuit 132, For example, the signal amplification level by the electronic volume circuit 132 is fixed to a predetermined setting level (step ST2).

Since only the digital audio signal corresponding to the main audio is input to the decoding unit 141, the volume adjustment of only the main audio is performed by the decoding unit 141, and the volume adjustment value is a predetermined attenuation as described above. Set to level.
For this reason, only the volume of the main voice is reduced and emitted, and the volume of the guidance voice is maintained at a certain appropriate level, so that the guidance voice may be low or buried in the main voice. In addition, the guidance voice can be easily heard.

When the guidance voice signal SA2 is not input (step ST1: NO), the master microcomputer 100 disables the volume control by the DSP 140 and switches the volume control of the main voice to the electronic volume circuit 132 (step ST3). The electronic volume circuit 132 variably controls the volume in conjunction with the power / volume key 7A.
In general, the electronic volume circuit 132 is configured to be able to perform volume control without impairing the sound quality as compared with the DSP 140. For this reason, while the guidance voice signal SA2 is not inputted, the volume can be variably controlled without damaging the sound quality by variably controlling the volume by the electronic volume circuit 132, while the guidance voice signal SA2 is inputted. During the middle, it is possible to control only the volume of the main voice to the attenuation level without changing the volume of the guidance voice by variably controlling the volume only by the DSP 140.
When the guidance voice signal SA2 is being input, the volume may be variably controlled by the decode 141 in conjunction with the volume value set by the power / volume key 7A. In this case, the user can adjust only the volume of the main voice while keeping the volume of the guidance voice constant.

According to the present embodiment, the DSP 140 changes the decoding process according to the selected setting information P1 to P4, and changes the output destination of the audio signal of each sound range obtained from the decoding result according to the change of the decoding process. Therefore, for example, when the output destination of the audio output OUT1 is a tweeter (FIGS. 6A and 6B), a high-frequency audio signal can be output from the audio output OUT1, and the audio output OUT1 When the output destination is a middle range speaker (FIG. 6C, FIG. 6D), a mid-range audio signal can be output from the audio output OUT1.
For this reason, when the user selects the setting information P1 to P4 that matches the current speaker connection configuration of the vehicle, an optimal acoustic space that matches the speaker connection configuration can be provided. Even if the configuration is changed, for example, when changing from a 3WAY configuration to a 5.1 channel configuration, etc., it is possible to easily provide a reproduction environment that matches the changed speaker connection configuration by simply changing the setting information to be selected. Can do.

In the present embodiment, the DSP 140 changes the mixing destination of the guidance voice signal SA2 to a voice signal corresponding to the voice output that is the output destination of the mid-range voice according to the selected setting information P1 to P4. By simply selecting setting information that matches the current speaker connection configuration, the user can surely set the mixing destination of the guidance voice signal SA2 to the middle-range voice signal and can reproduce the middle-range voice. Sound can be emitted from the speaker SP.
For this reason, for example, it is possible to easily and reliably avoid a situation in which only the high sound range of the guidance voice is emitted from the tweeter. In addition, no matter which setting information P1 to P4 is selected, the output destination of the guidance voice is set to the front speaker SP, so that the driver can easily hear the guidance voice regardless of the speaker connection configuration. Yes.

Further, in this embodiment, the volume of the main voice is variably controlled by the electronic volume circuit 132 while the guidance voice signal SA is not input, and only the volume of the main voice is variably controlled by the DSP 140 while the guidance voice signal SA is being input. Therefore, it is possible to control only the volume of the main voice while releasing the volume of the guidance voice at a constant level, and using a mixer circuit, the conventional voice sound signal is mixed with the main voice signal after volume adjustment. Compared to the above, the mixer circuit and its wiring can be reduced.
In addition, in the present embodiment, the DSP 140 operating by software processing has a function of performing a plurality of types of decoding processing, a function of performing mixing processing, and a function of performing volume adjustment processing, and the DSP 140 is based on the setting information P1 to P4. Therefore, it is only necessary to provide a function for selectively performing each processing, so that compared to an in-vehicle device having a conventional DSP, there is no need to newly arrange components, and an analog component such as a mixer circuit is omitted. As much as possible, the number of parts can be reduced and the arrangement space can be increased. In addition, it is possible to easily change the function to the same function as the DSP 140 by adding a function (program change) to the DSP of the conventional in-vehicle device.

  As mentioned above, although embodiment of the vehicle-mounted apparatus by this invention was described, this invention is not limited to this, A various change is possible. For example, in the above-described embodiment, the case where the guidance voice from the car navigation device is mixed and emitted is described as an example. However, the voice signal such as traffic information acquired by the radio receiver 110 or the like is mixed and emitted. It is also possible to apply it. Further, the above-described in-vehicle device may be an integrated type having a function of a car navigation device.

  Further, in the above-described embodiment, the case where the control program for performing each control is stored in the storage unit of the master microcomputer 100 in advance has been described. The program may be stored in a computer-readable recording medium such as a recording medium, and the computer may read and execute the control program from the recording medium. The control program may be downloaded from a distribution server on the communication network.

It is a front view of the car audio apparatus which is one aspect | mode of the vehicle-mounted apparatus which concerns on this Embodiment. It is a front view of the apparatus main body of a car audio apparatus. It is a rear view of DCP of a car audio apparatus. It is a block diagram which shows the functional structure of a car audio apparatus. It is a figure which shows setting information. (A)-(D) is a figure with which it uses for description of the connection structure of a speaker. It is a flowchart which shows a volume control process.

Explanation of symbols

1 Car Audio Device 2 Device Body 3 DCP
DESCRIPTION OF SYMBOLS 100 Master microcomputer 110 Radio | wireless receiving part 120 CD reproducing part 130 Audio | voice output part 140 DSP (voice processing means)
141 Decoding unit (first audio processing unit)
142 Mixing unit (second audio processing unit)
200 Car navigation device OUT1-3 Audio output P1-P4 Setting information SP, SP1L, SP1R, SP2L, SP2R, SP3L, SP3R Speakers SA1A, SA1B signals (first audio signals)
SA2 Guide voice signal (second voice signal)

Claims (9)

A plurality of audio outputs, each of which outputs a first audio signal of a plurality of channels corresponding to the first audio; In an audio device for mixing the corresponding second audio signal,
Among the plurality of sound outputs, a plurality of setting information including information for specifying an output destination of a sound signal including mid-range sound is stored in advance.
Based on selected setting information among the plurality of setting information, the second audio signal is output to an output destination of an audio signal including mid-range audio among the first audio signals of the plurality of channels. An audio apparatus comprising audio processing means for mixing with a signal.   The audio device according to claim 1, wherein the audio processing unit sets an output destination of each of the first audio signals of the plurality of channels based on the selected setting information.   3. The information according to claim 1, wherein the setting information further includes information for specifying at least one of an output destination of an audio signal including high-frequency sound and an output destination of an audio signal including low-frequency sound. The acoustic device described. The acoustic device is a vehicle-mounted acoustic device disposed in a vehicle,
The audio processing means is configured to output the second audio signal based on the selected setting information as an output destination of an audio signal including mid-range audio among the first audio signals of the plurality of channels. The audio device according to claim 1, wherein the audio device is mixed with an audio signal output to an audio output corresponding to a speaker in the vicinity of the driver's seat.   5. The acoustic apparatus according to claim 1, wherein the sound processing unit mixes the second sound signal with the first sound signal by software processing. 6.   The acoustic apparatus according to claim 5, wherein the sound processing means is a digital signal processor. A plurality of audio outputs, each of which outputs a first audio signal of a plurality of channels corresponding to the first audio, and a second audio including a mid-range audio in the first audio signal of a predetermined channel In the control method of the acoustic device for mixing the corresponding second audio signal,
Based on any of a plurality of setting information including information specifying an output destination of an audio signal including mid-range audio among the plurality of audio outputs, the second audio signal is converted into the first audio signal of the plurality of channels. Among them, mixing to an audio signal output to an output destination of an audio signal including mid-range audio. A method for controlling an acoustic device. A plurality of audio outputs, each of which outputs a first audio signal of a plurality of channels corresponding to the first audio, and a second audio including a mid-range audio in the first audio signal of a predetermined channel In a control program for controlling, by a computer, an acoustic device that mixes a corresponding second audio signal,
Based on any one of a plurality of setting information including information specifying an output destination of an audio signal including a mid-range audio among the plurality of audio outputs to the computer, the second audio signal is transmitted to the plurality of channels. A control program that mixes the first audio signal with an audio signal output to an output destination of an audio signal including mid-range audio. 9. A computer-readable recording medium on which the control program according to claim 8 is recorded.

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