JP2009194893A - Voice processor and its program, and voice reproducing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reproduce left-center side voice data, right-center side voice data, left outside voice data, right outside voice data or the like even in the case where there is no speaker output terminal corresponding to these voice data. <P>SOLUTION: When left-center side voice data and right-center side voice data are included, the left-center side voice data and the right-center side voice data are transmitted to a display to be reproduced through a left speaker of the display and a right speaker of the display, respectively, and left voice data and right voice data are reproduced through a left speaker and a right speaker, respectively. When left outside voice data and right outside voice data are included, the left voice data and the right voice data are reproduced through the left speaker of the display and the right speaker of the display, respectively, and the left outside voice data and the right outside voice data are reproduced through the left speaker and the right speaker, respectively. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an audio processing apparatus that reproduces multi-channel audio data including left center audio data, right center audio data, left outer audio data, and right outer audio data.

  An audio playback system including a DVD player, which is a source device compliant with the HDMI standard, an AV amplifier, which is a repeater device, and a display device, which is a sink device, is used, and video data is output as HDMI data output from the source device. In addition, by including the audio data, both the video data and the audio data can be transmitted to the repeater device or the sink device through one HDMI cable. The AV amplifier converts the HDMI data received from the DVD player into the original video data and audio data, amplifies the audio data and outputs it to the speaker, converts the video data into HDMI data again, and transmits it to the display device. . The display device converts the received HDMI data into the original video data and displays it.

The audio data included in the HDMI data transmitted from the DVD player to the AV amplifier is obtained by encoding multichannel audio data. For example, as shown in FIG. 15, multi-channel audio data includes left audio data L, right audio data R, central audio data C, low frequency audio data SW, surround left audio data SL, surround right audio data SR, and surround back. 7.1ch multi-channel audio data including left audio data SBL and surround back right audio data SBR is employed. Recently, Dolby True HD, Dolby Digital
HD (High Definition) related audio formats such as Plus and DTS-HD have appeared. In these formats, for example, left center side audio data Lc, right center side audio data Rc, left outside audio data Lw, Right outer audio data Rw is further added.

  However, considering the cost problem, the AV amplifier has an amplification processing unit and a speaker output terminal corresponding to the left central audio data Lc, the right central audio data Rc, the left outer audio data Lw, the right outer audio data Rw, and the like. Often not provided. Alternatively, even when an amplification processing unit and a speaker output terminal corresponding to these audio data are provided in the AV amplifier, the user often does not connect a speaker corresponding to these audio data to the AV amplifier. As a result, even when these audio data are included in the DVD disc, these audio data cannot be reproduced and the audio cannot be reproduced from the speaker.

  The following technology is described in Patent Document 1 below. In the AV amplifier, the HDMI receiving unit generates original video data and original multi-channel audio data from the HDMI data received from the DVD player, supplies the video data to the HDMI transmitting unit, and supplies the audio data to the audio processing unit. To supply. The audio processing unit decodes the multi-channel audio data, supplies only the central audio data to the HDMI transmission unit, performs D / A conversion on the audio data of other channels, performs amplification processing, and outputs to the speaker. The HDMI transmission unit generates HDMI data from the supplied video data and central audio data, and transmits the HDMI data to the display device. The display device generates original video data and central audio data from the received HDMI data, displays the video, and plays back from a speaker incorporating the central audio data.

  However, Patent Document 1 does not describe the left central audio data Lc, the right central audio data Rc, the left outer audio data Lw, and the right outer audio data Rw.

JP 2007-288247 A

  The present invention has been made to solve the above-described conventional problems, and its purpose is to cope with left center side audio data Lc, right center side audio data Rc, left outside audio data Lw, right outside audio data Rw, and the like. An audio processing device capable of reproducing these audio data from the speaker even when an amplification processing unit and a speaker output terminal are not provided, or when a speaker corresponding to these audio data is not connected Is to provide.

  An audio processing apparatus according to a preferred embodiment of the present invention is an audio processing apparatus capable of connecting a display apparatus including a display left speaker and a display right speaker and a left speaker and a right speaker arranged outside the display apparatus. Channel determination for determining whether multi-channel audio data including at least left audio data and right audio data includes left center audio data and right center audio data, or left outer audio data and right outer audio data Means and reproduction control means. When it is determined that the left center side audio data and the right center side audio data are included in the multi-channel audio data, the reproduction control means transmits the left center side audio data and the right center side audio data to the display device. The left center side audio data is reproduced from the display left speaker, the right center side audio data is reproduced from the display right speaker, the left audio data is reproduced from the left speaker, and the right audio data is reproduced from the right speaker. Let it play. When it is determined that the left outer audio data and the right outer audio data are included in the multichannel audio data, the reproduction control unit transmits the left audio data and the right audio data to the display device, and the display left speaker. The left audio data is reproduced from the right speaker, the right audio data is reproduced from the display right speaker, the left outer audio data is reproduced from the left speaker, and the right outer audio data is reproduced from the right speaker.

  If the speaker output terminal corresponding to the left center side audio data, right center side audio data, left outside audio data and right outside audio data is not provided in the audio processing device, or the speaker output terminals corresponding to these audio data Even if the speaker is not connected, the audio data can be reproduced using the display left speaker, the display right speaker, the left speaker, and the right speaker. Moreover, depending on whether left center audio data and right center audio data are included, or left outer audio data and right outer audio data are included, they are transmitted to the display device and reproduced from the display left speaker and the display right speaker. Since the audio data is switched, the audio data can be reproduced from an appropriate position.

  In a preferred embodiment, when it is determined that the left center side audio data and the right center side audio data are not included in the multi-channel audio data, and the left outside audio data and the right outside audio data are included, the reproduction control unit includes: Left audio data is reproduced from the left speaker, and right audio data is reproduced from the right speaker.

  In a preferred embodiment, the display device further comprises display connection determining means for determining whether or not the display device is connected to the sound processing device, and when the display device is determined not to be connected to the sound processing device. The left audio data is reproduced from the left speaker and the right audio data is reproduced from the right speaker irrespective of whether the left outer audio data and the right outer audio data are included in the multichannel audio data.

  When the display device is not connected, audio data cannot be reproduced from the display left speaker and the display right speaker. Therefore, even when the left outer audio data and the right outer audio data are included in the multichannel audio data, the main audio is generally reproduced by reproducing the left audio data and the right audio data from the left speaker and the right speaker. It is possible to prevent a problem that the left audio data and the right audio data which are the audio data are not reproduced.

  In a preferred embodiment, when the display device receives a volume setting command, the volume value of audio played from the display left speaker and the display right speaker is set to a volume value included in the volume setting command. When the audio processing device determines that the multi-channel audio data includes left center audio data and right center audio data, or left outer audio data and right outer audio data. And a volume control means for transmitting a volume setting command including a volume value set in the voice processing device to the display device.

  In this case, the volume value of the sound reproduced from the display left speaker and the display right speaker can be matched with the volume value of the sound reproduced from the left speaker and the right speaker.

  In a preferred embodiment, when it is determined that multi-channel audio data includes left center audio data and right center audio data, and left outer audio data and right outer audio data, the reproduction control means The left center side audio data and the right center side audio data are transmitted to the display device, the left center side audio data is reproduced from the display left speaker, the right center side audio data is reproduced from the display right speaker, and Left audio data is reproduced from the left speaker, and right audio data is reproduced from the right speaker.

  If it is determined that multi-channel audio data includes left center audio data, right center audio data, left outer audio data and right outer audio data, left audio data and right audio from the left speaker and right speaker Control is performed so that each data is reproduced. Generally, the left speaker and the right speaker have higher sound quality than the display left speaker and the display right speaker, so the left audio data and the right audio data, which are the main audio data, are played from the high sound quality speakers. be able to.

  In a preferred embodiment, the audio processing device can further connect a left center speaker, a right center speaker, a left outer speaker, and a right outer speaker, and the left center speaker, the right center speaker, and the left outer speaker. Speaker determination means for determining whether the speaker and the right outer speaker are connected to the audio processing device. When it is determined that multi-channel audio data includes left center audio data and right center audio data and the left center speaker and the right center speaker are not connected, the playback control means The left center side audio data and the right center side audio data are transmitted to the display device, the left center side audio data is reproduced from the display left speaker, the right center side audio data is reproduced from the display right speaker, and Left audio data is reproduced from the left speaker, right audio data is reproduced from the right speaker, multi-channel audio data includes left outer audio data and right outer audio data, and the left outer speaker and If it is determined that the right outer speaker is not connected, the playback control Transmits left audio data and right audio data to the display device, reproduces left audio data from the display left speaker, reproduces right audio data from the display right speaker, and outputs left audio data from the left speaker. And the right outer audio data is reproduced from the right speaker.

  If the left center speaker, right center speaker, left outer speaker, and right outer speaker can be connected, the display left speaker will be displayed if these speakers are not connected in consideration of the connection of these speakers. Audio data may be reproduced from the display right speaker. That is, when these speakers are connected, audio data can be reproduced from these speakers.

  In a preferred embodiment, the playback control means converts the data to left center side audio data and right center side audio data, or HDMI data that conforms to the HDMI standard including left audio data and right audio data, and video data. To the display device.

  In this case, since the audio data to be transmitted to the display device can be included in the video data and transmitted, it is not necessary to provide a cable for separately transmitting the audio data to the display device.

  An audio processing apparatus according to another preferred embodiment of the present invention is a multi-channel including at least a left audio data and a right audio data, wherein a left outer speaker, a right outer speaker, a left center speaker and a right center speaker can be connected. Channel determination means for determining whether the audio data includes left center audio data and right center audio data, or left outer audio data and right outer audio data, and left center audio data in the multichannel audio data And when the right center side audio data is determined to be included, the left center side audio data is reproduced from the left center side speaker, the right center side audio data is reproduced from the right center side speaker, and the left center side audio data is reproduced. Play left audio data from the outer speaker and right audio data from the right outer speaker When the left outer audio data and the right outer audio data are determined to be included in the multichannel audio data, the left audio data is reproduced from the left center speaker, and the right audio data is output from the right center speaker. Reproduction control means for reproducing the left outer audio data from the left outer speaker and reproducing the right outer audio data from the right outer speaker.

  If the speaker output terminal corresponding to the left center side audio data, right center side audio data, left outside audio data and right outside audio data is not provided in the audio processing device, or the speaker output terminals corresponding to these audio data Even if the speaker is not connected, the audio data can be reproduced using the display left speaker, the display right speaker, the left speaker, and the right speaker.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an audio playback system including a disk playback device (source device, DVD player), an audio processing device (repeater device, AV amplifier) and a display device (sink device, television receiver) according to a preferred embodiment of the present invention will be described. However, the present invention is not limited to these embodiments.

  FIG. 1 is a diagram for explaining an example of the arrangement of the AV amplifier 20, the display device 30, and each speaker in the present embodiment (DVD player 10 is omitted). The display device 30 includes a display unit 32, a display left speaker SLD, and a display right speaker SRD. A display device 30 is connected to the AV amplifier 20 via an HDMI cable. The left speaker SL, the right speaker SR, the center speaker SC, the low frequency speaker SSW, the surround left speaker SSL, the surround right speaker SSR, and the surround back left speaker SSBL. The surround back right speaker SSBR is connected. The left speaker SL is disposed outside (left side) the display left speaker SLD, and the right speaker SR is disposed outside (right side) the display right speaker SRD.

  In this example, the AV amplifier 20 includes an amplification processing unit and a speaker output terminal corresponding to left center side audio data Lc, right center side audio data Rc, left outside audio data Lw, and right outside audio data Rw described later. Accordingly, in FIG. 1, speakers corresponding to these audio data are not connected and arranged.

  2 is a block diagram showing the configurations of the DVD player 10 and the AV amplifier 20, and FIG. 3 is a block diagram showing the configurations of the AV amplifier 20 (same as FIG. 2) and the display device 30, respectively. The DVD player 10, the AV amplifier 20, and the display device 30 comply with the HDMI standard, for example, and are connected to each other via an HDMI cable.

[Configuration of DVD Player 10]
The DVD player 10 includes a reproduction unit 11, a resolution conversion unit 12, an HDMI transmission unit 13, a system control unit 14, an operation display unit 15, a memory 16, and a connector unit 17.

  The playback unit 11 reads video data recorded on a DVD disc (hereinafter simply referred to as a disc) from the disc, and supplies it to the resolution conversion unit 12. In addition, the playback unit 11 reads encoded multi-channel audio data recorded on the disc from the disc and supplies it to the HDMI transmission unit 13. The reproduction unit 11 includes an optical pickup, a servo circuit, an MPEG decoder, an audio decoder, etc. (not shown).

  The resolution conversion unit 12 determines the resolution of the video data supplied from the reproduction unit 11. In addition, the resolution conversion unit 12 converts the determined resolution of the video data into a resolution set by the user by a command from the system control unit 14. The video data whose resolution has been converted by the resolution conversion unit 12 is supplied to the HDMI transmission unit 13.

  The HDMI transmission unit 13 converts the video data supplied from the resolution conversion unit 12 and the audio data supplied from the playback unit 11 into HDMI standard data (hereinafter referred to as HDMI data) by a command from the system control unit 14. Convert. The HDMI transmission unit 13 transmits the HDMI data to the AV amplifier 20 via the connector unit 17.

  The HDMI transmission unit 13 includes a TMDS line for transmitting and receiving HDMI data (normally there are a plurality of lines, but only one line is shown in FIG. 1 for simplicity), and a hot plug for determining the presence or absence of connection. To the HDMI receiving unit 21 of the AV amplifier 20. The HDMI transmission unit 13 is connected to the HDMI reception unit 21 and the PROM 25 of the AV amplifier 20 via a DDC line for reading authentication information and EDID.

  The system control unit 14 controls the playback unit 11, the resolution conversion unit 12, the HDMI transmission unit 13, the operation display unit 15, the memory 16, and the like based on the operation program of the DVD player stored in the built-in or connected memory. For example, a microcomputer or a CPU is used. The system control unit 14 executes various processes based on an operation input from the operation display unit 15 or a control signal and data from each unit.

  The system control unit 14 is connected to the system control unit 23 of the AV amplifier 20 via the CEC line, and transmits / receives commands and / or data to / from the system control unit 23.

[Configuration of AV amplifier]
Next, the configuration of the AV amplifier 20 will be described with reference to FIG. 2 or FIG. The AV amplifier 20 includes an HDMI receiving unit 21, an HDMI transmitting unit 22, a system control unit 23, an operation display unit 24, a memory (EDID PROM, hereinafter referred to as PROM) 25, an audio processing unit 26, and a connector. Parts 27 and 28.

  The HDMI receiving unit 21 receives the HDMI data transmitted from the DVD player 10, generates original video data (video data before HDMI conversion) from the received HDMI data, and supplies it to the HDMI transmitting unit 22. Further, the HDMI receiving unit 21 generates original multi-channel audio data from the received HDMI data and supplies the generated multi-channel audio data to the audio processing unit 26.

  The audio processing unit 26 decodes the multi-channel audio data supplied from the HDMI receiving unit 21, executes each process such as acoustic processing, D / A conversion processing, volume adjustment processing, amplification processing, and the like, and is connected to the outside. The audio signal of each channel is supplied to the speaker 60 (corresponding to each speaker in FIG. 1). Further, the audio processing unit 26 supplies audio data of a certain channel to the HDMI transmission unit 22 as necessary.

Here, the multi-channel audio data supplied to the audio processing unit 26 will be described. Dolby True HD, Dolby Digital
In an HD (High Definition) related audio format such as Plus or DTS-HD, as shown in FIG. 15, for example, left audio data L, right audio data R, central audio data C, low frequency audio data SW, surround Left audio data SL, surround right audio data SR, surround back left audio data SBL, surround back right audio data SBR, left center audio data Lc, right center audio data Rc, left outside audio data Lw, right outside audio data Rw The multi-channel audio data supplied to the audio processing unit 26 includes eight channels selected from these (generally, the low-frequency audio data SW is expressed as 0.1 ch, 7.1 Audio data) (called channels).

  Note that the left center audio data Lc is audio data reproduced from a position between the left audio data L and the central audio data C (center side than the left audio data L). The right center audio data Rc is audio data reproduced from a position between the right audio data R and the central audio data C (center side than the right audio data R). The left outer audio data Lw is audio data reproduced from a position outside (left side) of the left audio data L. The right outer audio data Rw is audio data reproduced from a position outside (right) the right audio data R. As described above, the speaker corresponding to these audio data is not provided in FIG.

For example, the following patterns (1) to (4) are conceivable for the multichannel audio data supplied to the audio processing unit 26.
(1) Left audio data L, right audio data R, central audio data C, low frequency audio data SW, surround left audio data SL, surround right audio data SR, surround back left audio data SBL, surround back right audio data SBR If included.
(2) Left audio data L, right audio data R, central audio data C, low frequency audio data SW, surround left audio data SL, surround right audio data SR, left central audio data Lc, and right central audio data Rc If included.
(3) Left audio data L, right audio data R, central audio data C, low frequency audio data SW, surround left audio data SL, surround right audio data SR, left outer audio data Lw, and right outer audio data Rw are included. If so.
(4) Left audio data L, right audio data R, central audio data C, low frequency audio data SW, left central audio data Lc, right central audio data Rc, left outer audio data Lw, and right outer audio data Rw If included.

  FIG. 4 is a block diagram illustrating a configuration of the audio processing unit 26. The audio processing unit 26 includes a DSP 41, a DAC (digital-analog converter) 42, a volume adjustment unit 43, an amplification processing unit 44, a conversion unit 45, and a switching unit 46. In this example, the switching unit 46 is provided in the DSP 41, but may be provided in a subsequent stage of the DSP 41 (between the DSP 41 and the DAC 42 and between the DSP 41 and the conversion unit 45).

  The DSP 41 decodes the multichannel audio data supplied from the HDMI receiving unit 21 and generates decoded audio data of each channel. Among the audio data decoded by the DSP 41, the central audio data C, the low frequency audio data SW, the surround left audio data SL, the surround right audio data SR, the surround back left audio data SBL, and the surround back right audio data SBR are directly used as the DAC 42. To be supplied. On the other hand, the left audio data L, the right audio data R, the left center audio data Lc, the right center audio data Rc, the left outer audio data Lw, and the right outer audio data Rw are first supplied to the switching unit 46.

  The switching unit 46 supplies the left audio data L, right audio data R, left center audio data Lc, right center audio data Rc, left outer audio data Lw, and right outer audio data Rw to the DAC 42 (that is, AV It is selected whether to reproduce from the speaker connected to the amplifier 20 or to supply to the conversion unit 45 (that is, to reproduce from the speaker of the display device). Specifically, the switching unit 42 switches the switch SW1 for switching between the left audio data L and the left outer audio data Lw to be supplied to the DAC 42, and the right audio data R and the right outer audio data Rw to the DAC 42. A switch SW2 for switching whether to supply, a switch SW3 for switching which of the left audio data L and the left central audio data Lc to be supplied to the converter 45, and the right audio data R and the right central audio data Rc. And a switch SW4 for switching which one is supplied to the converter 45.

  The DAC 42 converts the audio data of each channel supplied from the DSP 41 and the switching unit 46 from digital to analog, and supplies the analog audio signal of each channel to the volume adjustment unit 43.

  The volume adjustment unit 43 adjusts the volume value of the analog audio signal of each channel and supplies it to the amplification processing unit 44. The volume adjustment unit 43 is provided with a volume adjustment circuit such as a variable resistor for each channel. The amplification processing unit 44 amplifies the audio signal of each channel supplied from the volume adjustment unit 43 and outputs the amplified signal to the speaker of each channel via the speaker output terminal of each channel. The amplification processing unit 44 is provided with an amplification circuit for each channel.

  The conversion unit 45 is supplied with the left audio data L and the right audio data R or the left center audio data Lc and the right center audio data Rc from the switching unit 46. Further, the conversion unit 45 is supplied with the bit clock BCLK, the master clock MCLK, and the LR clock LRCLK from the DSP 41. The conversion unit 45 converts the left audio data L and the right audio data R or the left center audio data Lc and the right center audio data Rc into SPDIF (2-channel PCM) audio data based on each clock, This is supplied to the HDMI transmission unit 22.

  Returning to FIG. 2 or FIG. 3, the HDMI transmission unit 22 receives the video data supplied from the HDMI reception unit 21 and the left audio data L and the right audio data R supplied from the conversion unit 45 of the audio processing unit 26. The left center audio data Lc and the right center audio data Rc are converted into HDMI data. The HDMI transmission unit 22 transmits the converted HDMI data to the HDMI reception unit 31 of the display device 30.

  The HDMI transmission unit 22 is connected to the HDMI reception unit 31 of the display device 30 via a TMDS line and a hot plug. The HDMI transmission unit 22 is connected to the PROM 34 and the HDMI reception unit 31 of the display device 30 via a DDC line.

  The system control unit 23 controls the HDMI reception unit 21, the HDMI transmission unit 22, the operation display unit 24, the PROM 25, the audio processing unit 26, and the like based on an AV amplifier operation program stored in a built-in or connected memory. For example, a microcomputer or a CPU is used. The system control unit 23 executes various processes based on an operation input from the operation display unit 24 or a control signal and data from each unit.

  The system control unit 23 acquires the channel information of the multichannel audio data from the audio processing unit 26, and the left center side audio data Lc and the right center side audio data Rc are included in the multichannel audio data, or the left outer side. It is determined whether the audio data Lw and the right outer audio data Rw are included.

  When the left central audio data Lc and the right central audio data Rc are included, the system control unit 23 outputs the left audio data L and the right audio data R to the DAC 42, and the left central audio data Lc and The switching unit 46 is controlled to output the right center side audio data Rc to the conversion unit 45. That is, the switch SW1 selects the left audio data L, the switch SW2 selects the right audio data R, the switch SW3 selects the left center audio data Lc, and the switch SW4 selects the right center audio data Rc. Thereby, in FIG. 1, the left audio data L is reproduced from the left speaker SL, the right audio data R is reproduced from the right speaker SR, the left center side audio data Lc is reproduced from the display left speaker SLD, and the display right speaker SRD. To the right center audio data Rc is reproduced.

  When the left outer audio data Lw and the right outer audio data Rw are included, the system control unit 23 outputs the left audio data L and the right audio data R to the conversion unit 45, and outputs the left outer audio data Lw and the right audio data Lw. The switching unit 46 is controlled to output the outer audio data Rw to the DAC 42. That is, the switch SW1 selects the left outside audio data Lw, the switch SW2 selects the outside right audio data Rw, the switch SW3 selects the left audio data L, and the switch SW4 selects the right audio data R. Thus, in FIG. 1, the left outer audio data Lw is reproduced from the left speaker SL, the right outer audio data Rw is reproduced from the right speaker SR, the left audio data L is reproduced from the display left speaker SLD, and the display right speaker SRD. To the right audio data R is reproduced.

  The system control unit 23 is connected to the system control unit 14 of the DVD player 10 via the CEC line, and transmits and receives commands and data to and from the system control unit 14. The system control unit 23 is connected to the system control unit 33 of the display device 30 via the CEC line, and transmits and receives commands and data to and from the system control unit 33.

  When the multi-channel audio data includes left center audio data Lc and right center audio data Rc, or left outer audio data Lw and right outer audio data Rw, the system control unit 23 sets the CEC line. The volume setting command including the volume value that is currently set in the AV amplifier 20 is transmitted to the display device 30. When the left audio data L and the right audio data R, or the left central audio data Lc and the right central audio data Rc are reproduced using the speaker of the display device 30, reproduction is performed from the speaker connected to the AV amplifier 20. This is because the volume of the sound to be played and the volume of the sound played from the speaker of the display 30 are matched.

[Configuration of Display Device 30]
Next, the display device 30 will be described with reference to FIG. The display device 30 includes an HDMI receiving unit 31, a display unit 32, a system control unit 33, a memory (EDID PROM, hereinafter referred to as PROM) 34, an operation unit 35, an audio processing unit 36, and a speaker 37 ( 1) (corresponding to the display left speaker SLD and the display right speaker SRD) in FIG.

  The HDMI receiving unit 31 receives the HDMI data transmitted from the HDMI transmitting unit 22 of the AV amplifier 20, generates original video data from the HDMI data, and supplies the original video data to the display unit 32. In addition, the HDMI receiving unit 31 generates original audio data from the HDMI data and supplies it to the audio processing unit 36. As described above, the audio data is left audio data L and right audio data R, or SPDIF (PCM) data including left center audio data Lc and right center audio data Rc.

  The audio processing unit 36 performs each process such as a D / A conversion process, a volume adjustment process, and an amplification process on the audio data supplied from the HDMI receiving unit 31, and supplies it to the speaker 37. FIG. 5 is a block diagram illustrating a configuration of the audio processing unit 36. The audio processing unit 36 includes a DAC (digital-analog converter) 51, a volume adjustment unit 52, and an amplification processing unit 53.

  The DAC 51 performs digital-analog conversion on the audio data supplied from the HDMI receiving unit 31 and supplies an analog audio signal to the volume adjusting unit 52. The volume adjustment unit 52 adjusts the volume value of the analog audio signal from the DAC 51 and supplies it to the amplification processing unit 53. The volume value of the volume adjustment unit 52 is adjusted by the system control unit 33 to the volume value included in the volume setting command from the system control unit 14 of the AV amplifier 20. The amplification processing unit 53 amplifies the audio signal from the volume adjustment unit 52 and outputs it to the speaker. That is, the left audio data L or the left central audio data Lc is reproduced from the display left speaker SLD, and the right audio data R or the right central audio data Rc is reproduced from the display right speaker SRD.

  The display unit 32 is supplied with video data from the HDMI receiving unit 31 and displays video based on the video data, and is, for example, an LCD or a CRT.

  The system control unit 33 controls the HDMI receiving unit 31, the display unit 32, the PROM 34, the audio processing unit 36, and the like based on an operation program of the display device stored in a built-in or connected memory. A microcomputer or a CPU. The system control unit 33 executes various processes based on an operation input from the operation unit 35 or a control signal and data from each unit.

  Upon receiving the volume setting command from the system control unit 23 of the AV amplifier 20, the system control unit 33 controls the volume value of the volume adjustment unit 52 based on the volume value included in the volume setting command. When the control of the volume value is completed, the system control unit 33 transmits a volume setting completion notification to the system control unit 23 of the AV amplifier 20 via the CEC line. This is to prompt the AV amplifier 20 to start transmitting the left audio data L and the right audio data R or the HDMI data including the left center audio data Lc and the right center audio data Rc.

[Operation of audio playback system]
The operation of the present invention will be described below with reference to the flowcharts of FIGS. As shown in FIG. 6, the system control unit 23 of the AV amplifier 20 monitors whether or not HDMI data is input from the DVD player 10, that is, whether or not the HDMI receiving unit 21 receives HDMI data. (S11). When the HDMI data is input (YES in S11), the system control unit 23 controls the volume adjustment unit 43 and the amplification processing unit 44 to be in a mute state (S12), and noise due to switching of each switch of the switching unit 46 is caused by the speaker. Output from.

  The HDMI receiving unit 21 generates original video data and multi-channel audio data from the HDMI data, supplies the video data to the HDMI transmission unit 22, and supplies the multi-channel audio data to the audio processing unit 26. The audio processing unit 26 decodes a part of the multi-channel audio data, reads the channel information included in the information area, and supplies the channel information to the system control unit 23 (S13).

  Subsequently, the system control unit 23 determines whether or not the display device 30 is connected to the AV amplifier 20 (S14). For example, when the display device 30 is connected via an HDMI cable, since the hot plug output from the display device 30 is at a high level, the presence or absence of the connection can be determined by determining the hot plug level. . Here, since the display device 30 is connected (YES in S14), the process proceeds to S15.

  The system control unit 23 determines whether or not the left center side audio data Lc and the right center side audio data Rc, or the left outside audio data Lw and the right outside audio data Rw are included in the multichannel audio data (S15). ). In the case of the multi-channel audio data (2) to (4) above, the audio data of these channels is included (YES in S15). Accordingly, the system control unit 23 sets the CEC line to prepare for reproducing the left center side audio data Lc and the right center side audio data Rc or the left audio data L and the right audio data R with the speaker of the display device 30. Then, a volume setting command is transmitted to the system control unit 33 of the display device 30 (S16). The volume setting command includes a volume value (not a relative value but an absolute value such as a dB unit) that is currently set in the volume adjustment unit 43 of the AV amplifier 20.

  As shown in FIG. 7, the system control unit 33 of the display device 30 monitors whether a volume setting command is received from the system control unit 23 of the AV amplifier 20 via the CEC line (S31). When receiving the volume setting command (YES in S31), the system control unit 33 reads the volume value included in the volume setting command and sets the volume value of the volume adjustment unit 52 to the volume value (S32). Subsequently, the system control unit 33 transmits a volume setting completion notification to the system control unit 23 of the AV amplifier 20 via the CEC line (S33). Thereafter, the display device 30 stands by until HDMI data is received from the AV amplifier 20.

  Returning to FIG. 6, the system control unit 23 of the AV amplifier 20 monitors whether or not a volume setting completion notification has been received from the system control unit 33 of the display device 30 via the CEC line (S17). When the volume setting completion notification is received (YES in S17), the system control unit 23 controls the audio processing unit 26 and the HDMI transmission unit 22 to decode the multi-channel audio data and transmit the HDMI data to the display device 30. Execute (S18).

  Details of S18 will be described with reference to FIG. First, the audio processing unit 26 (DSP 41) decodes audio data of each channel (S22). Based on the channel information supplied from the audio processing unit 26, the system control unit 23 determines whether the left center side audio data Lc and the right center side audio data Rc are included in the multichannel audio data ( S23). Hereinafter, the processing will be described by taking the multichannel audio data (1) to (4) as an example.

[For audio data (2)]
In the case of the audio data of (2) above, that is, when the left central audio data Lc and the right central audio data Rc are included (the left outer audio data Lw and the right outer audio data Rw are not included). Is determined YES in S23. In the switching unit 46, the system control unit 23 causes the switch SW1 to select the left audio data L, causes the switch SW2 to select the right audio data R, causes the switch SW3 to select the left center side audio data Lc, and causes the switch SW4 to select the right audio data Lc. The central audio data Rc is selected.

  As a result, the switching unit 46 supplies the left center side audio data Lc and the right center side audio data Rc decoded by the DSP 41 to the conversion unit 45. The conversion unit 45 converts the left central audio data Lc and the right central audio data Rc into SPDIF (PCM) data and supplies the converted data to the HDMI transmission unit 22. The HDMI transmission unit 22 generates HDMI data from the video data, the left central audio data Lc, and the right central audio data Rc, and transmits the HDMI data to the HDMI receiving unit 31 of the display device 30 (S24).

  As shown in FIG. 7, when receiving the HDMI data, the HDMI receiving unit 31 of the display device 30 generates the original video data, the left central audio data Lc, and the right central audio data Rc, and displays the video data. The left central audio data Lc and the right central audio data Rc are supplied to the audio processing unit 36 (S34). The system control unit 33 controls the volume adjustment unit 52 and the amplification processing unit 53 to cancel the mute state (S35). In the audio processing unit 36, the DAC 51 performs digital-analog conversion of the audio data, the volume adjustment unit 52 adjusts the volume value of the analog audio signal, and the amplification processing unit 53 amplifies the analog audio signal and outputs it to the speaker. As a result, the center left audio data Lc is reproduced from the display left speaker SLD, and the center right audio data Rc is reproduced from the display right speaker SRD (S36).

  As shown in FIG. 8, the switching unit 46 supplies the left audio data L and the right audio data R decoded by the DSP 41 to the DAC 42 (S25). The DAC 42 converts the audio data from digital to analog, the volume adjustment unit 52 adjusts the volume value of the analog audio signal, and the amplification processing unit 53 amplifies the analog audio signal and outputs it to the speaker. As a result, the left audio data L is reproduced from the left speaker SL, and the right audio data R is reproduced from the right speaker SR. Similarly, the central audio data C is reproduced from the central speaker C, the surround left audio data SL is reproduced from the surround left speaker SSL, and the surround right audio data SR is reproduced from the surround right speaker SSR.

  As described above, in the case of the audio data (2), the left center audio data Lc is reproduced from the display left speaker SLD, the right center audio data Rc is reproduced from the display right speaker SRD, and the left speaker SL. The left audio data L is reproduced from the right speaker SR, and the right audio data R is reproduced from the right speaker SR. Therefore, the left center side audio data Lc and the right center side audio data Rc can be reproduced from appropriate positions using the existing speaker arrangement.

[For audio data in (3)]
In the case of the audio data of (3) above, that is, when the left outer audio data Lw and the right outer audio data Rw are included (the left central audio data Lc and the right central audio data Rc are not included). Is determined NO in S23. In the switching unit 46, the system control unit 23 causes the switch SW1 to select the left outer audio data Lw, causes the switch SW2 to select the right outer audio data Rw, causes the switch SW3 to select the left audio data Lw, and causes the switch SW4 to select the right The audio data Rc is selected.

  As a result, the switching unit 46 supplies the left audio data L and the right audio data R decoded by the DSP 41 to the conversion unit 45. The conversion unit 45 converts the left audio data L and the right audio data R into SPDIF (PCM) data, and supplies the converted data to the HDMI transmission unit 22. The HDMI transmission unit 22 generates HDMI data from the video data, the left audio data L, and the right audio data R, and transmits the HDMI data to the HDMI reception unit 31 of the display device 30 (S26).

  As shown in FIG. 7, when receiving the HDMI data, the HDMI receiving unit 31 of the display device 30 generates the original video data, the left audio data L, and the right audio data R, and supplies the video data to the display unit 32. Then, the left audio data L and the right audio data R are supplied to the audio processing unit 36 (S34). The system control unit 33 controls the volume adjustment unit 52 and the amplification processing unit 53 to cancel the mute state (S35). In the audio processing unit 36, the DAC 51 performs digital-analog conversion of the audio data, the volume adjustment unit 52 adjusts the volume of the analog audio signal, and the amplification processing unit 53 amplifies the analog audio signal and outputs it to the speaker. As a result, the left audio data L is reproduced from the display left speaker SLD, and the right audio data Rc is reproduced from the display right speaker SRD (S36).

  As shown in FIG. 8, the switching unit 46 supplies the left outer audio data Lw and the right outer audio data Rw decoded by the DSP 41 to the DAC 42 (S27). The DAC 42 converts the audio data from digital to analog, the volume adjustment unit 52 adjusts the volume value of the analog audio signal, and the amplification processing unit 53 amplifies the analog audio signal and outputs it to the speaker. As a result, the left outer audio data Lw is reproduced from the left speaker SL, and the right outer audio data Rw is reproduced from the right speaker SR. Similarly, the central audio data C is reproduced from the central speaker C, the surround left audio data SL is reproduced from the surround left speaker SSL, and the surround right audio data SR is reproduced from the surround right speaker SSR.

  As described above, in the case of the audio data (3), the left audio data L is reproduced from the display left speaker SLD, the right audio data R is reproduced from the display right speaker SRD, and the left outer audio is output from the left speaker SL. Data Lw is reproduced, and right outer audio data Rw is reproduced from the right speaker SR. Therefore, the left outer audio data Lw and the right outer audio data Rw can be reproduced from appropriate positions using the existing speaker arrangement.

[In the case of (4) audio data]
In the case of the above audio data (4), that is, when both the left center side audio data Lc and the right center side audio data Rc, and the left outside audio data Lw and the right outside audio data Rw are included, S23 It is judged as YES. Therefore, the same processing as in the case of the audio data (2) is executed. Accordingly, the left center audio data Lc is reproduced from the display left speaker SLD, the right center audio data Rc is reproduced from the display right speaker SRD, the left audio data L is reproduced from the left speaker SL, and the right audio data is reproduced from the right speaker SR. R is played back. In this case, the left outer audio data Lw and the right outer audio data Rw are not reproduced.

  As described above, when both the left central audio data Lc and the right central audio data Rc, the left outer audio data Lw, and the right outer audio data Rw are included, the left audio data L is transmitted from the left speaker SL. And the right audio data R is controlled to be reproduced from the right speaker SR. In general, the left audio data L and the right audio data R are main audio data in the multi-channel audio data, and therefore, a left speaker in which a speaker having higher sound quality than that of the display device 30 is generally employed. By reproducing with SL and right speaker SR, it is possible to provide the user with excellent sound quality.

  When both the left center audio data Lc and the right center audio data Rc, the left outer audio data Lw, and the right outer audio data Rw are included, the display left speaker SLD is the same as (3) above. The left audio data L may be reproduced from the right speaker, the right audio data R may be reproduced from the display right speaker, the left outer audio data Lw may be reproduced from the left speaker SL, and the right outer audio data Rw may be reproduced from the right speaker SR. (2) It may be possible to set which process of (3) is performed by a user operation.

[In the case of (1) audio data]
In the case of the above audio data (1), that is, when the left outer audio data Lw and the right outer audio data Rw and the left center audio data Lc and the right center audio data Rc are not included, FIG. It is determined NO in S15. In this case, the system control unit 23 performs control so as to reproduce the multi-channel audio data by a normal method (S21). Specifically, the system control unit 23 causes the switching unit 46 to cause the switch SW1 to select the left audio data L and cause the switch SW2 to select the right audio data R. Further, the system control unit 23 causes the switch SW3 to select the left center side audio data Lc, and causes the switch SW4 to select the right center side audio data Rc.

  The switching unit 46 supplies the left audio data L and the right audio data R decoded by the DSP 41 to the DAC 42. The DAC 42 converts the audio data from digital to analog, the volume adjustment unit 52 adjusts the volume of the analog audio signal, and the amplification processing unit 53 amplifies the analog audio signal and outputs it to the speaker. As a result, the left audio data L is reproduced from the left speaker SL, and the right audio data R is reproduced from the right speaker SR. Similarly, the central audio data C is reproduced from the central speaker C, the surround left audio data SL is reproduced from the surround left speaker SSL, the surround right audio data SR is reproduced from the surround right speaker SSR, and the surround rear left audio data. SBL is reproduced from the surround back left speaker SSBL, and the surround back right audio data SBR is reproduced from the surround back right speaker SSBR.

  Further, since the left center side audio data Lc and the right center side audio data Rc are not included in the multi-channel audio data, the switching unit 46 to the conversion unit 45 transfer the left center side audio data Lc and the right center side audio data. Rc is not supplied, and audio data is not supplied from the conversion unit 45 to the HDMI transmission unit 22. Accordingly, the HDMI transmission unit 22 generates HDMI data from only the video data and transmits the HDMI data to the HDMI reception unit 31 of the display device 30.

  When receiving the HDMI data, the HDMI receiving unit 31 of the display device 30 generates the original video data and supplies the video data to the display unit 32. On the other hand, since no audio signal is supplied to the speaker of the display device 30, no audio is reproduced from the display left speaker SLD and the display right speaker SRD.

[When the display device 30 is not connected]
If it is determined in S14 that the display device 30 is not connected to the AV amplifier 20 (NO in S14), the process proceeds to S21, and the same processing as in the case of the audio data in (1) is executed. . When the display device 30 is not connected, audio data cannot be reproduced using the display left speaker SLD and the display right speaker SRD. Here, when the left outer audio data Lw and the right outer audio data Rw are included in the multichannel audio data, the switching unit 46 causes the switch SW1 to select the left outer audio data Lw and causes the switch SW2 to select the right outer audio data Lw. When the data Rw is selected, the left audio data L is selected by the switch SW3, and the right audio data Rc is selected by the switch SW4, the left audio data L and the right audio data R that are main audio data are not reproduced. Occurs. However, in this example, when it is determined that the display device 30 is not connected, the left audio data L and the left audio data L and the switch SW2 are selected by causing the switch SW1 to select the left audio data L and the switch SW2. The right audio data R can be reliably reproduced.

  Next, another preferred embodiment of the present invention will be described. In this example, as shown in FIGS. 9 and 10, the AV amplifier 20b includes a left center side audio data Lc, a right center audio data Rc, a left outside audio data Lw, a DAC 42 for the right outside audio data Rw, and a volume adjustment unit. 43, an amplification processing unit 44, and a speaker output terminal are provided, and a left center speaker SLc, a right center speaker SRc, a left outer speaker SLw, and a right outer speaker SRw can be connected. On the setting screen (not shown) of the AV amplifier 20b, whether or not the left center speaker SLc, the right center speaker SRc, the left outer speaker SLw, and the right outer speaker SRw are connected can be set by a user operation.

  FIG. 11 is a flowchart showing the operation of the AV amplifier 20b in this example. The same processes as those in FIG. In S51, the system control unit 23 determines whether the left center audio data Lc and the right center audio data Rc are included in the multichannel audio data. If included (YES in S51), it is determined by referring to the setting state on the setting screen whether the left center speaker SLc and the right center speaker SRc are connected to the AV amplifier 10 (S52). . When the left center speaker SLc and the right center speaker SRc are connected to the AV amplifier 10 (YES in S52), the process proceeds to S21, and audio data is reproduced by a normal method. That is, the left center side audio data Lc is reproduced from the left center side speaker SLc, the right center side audio data Rc is reproduced from the right center speaker SRc, the left audio data L is reproduced from the left speaker SL, and the right speaker SR is reproduced. Right audio data R is reproduced. On the other hand, when the left center speaker SLc and the right center speaker SRc are not connected to the AV amplifier 10 (NO in S52), the display left speaker SLD is similar to the processing in the case of the audio data in (2) above. Left center audio data Lc is reproduced, right center audio data Rc is reproduced from the display right speaker SRD, left audio data L is reproduced from the left speaker SL, and right audio data R is reproduced from the right speaker SR. .

  On the other hand, when the left center audio data Lc and the right center audio data Rc are not included in the multichannel audio data (NO in S51), the system control unit 23 adds the left outer audio data Lw and the right audio data to the multichannel audio data. It is determined whether or not the outer audio data Rw is included (S53). If included (YES in S53), it is determined whether the left outer speaker SLw and the right outer speaker SRw are connected to the AV amplifier 10 with reference to the setting state on the setting screen (S54). If the left outer speaker SLw and the right outer speaker SRw are connected to the AV amplifier 10 (YES in S54), the process proceeds to S21, and audio data is reproduced by a normal method. That is, the left outer audio data Lw is reproduced from the left outer speaker SLw, the right outer audio data Rw is reproduced from the right outer speaker SRw, the left audio data L is reproduced from the left speaker SL, and the right audio data R is reproduced from the right speaker SR. Is played. On the other hand, when the left outer speaker SLw and the right outer speaker SRw are not connected to the AV amplifier 10 (NO in S54), the display left speaker SLD is moved to the left as in the case of the audio data in (3) above. The audio data L is reproduced, the right audio data R is reproduced from the display right speaker SRD, the left outer audio data Lw is reproduced from the left speaker SL, and the right outer audio data Rw is reproduced from the right speaker SR.

  Next, still another preferred embodiment of the present invention will be described. In this example, as shown in FIGS. 12 and 13, the AV amplifier 20c includes the left center side audio data Lc (or left audio data L), the right center side audio data Rc (or right audio data R), and the left outer side. A DAC 42c, a volume adjustment unit 43c, an amplification processing unit 44c and a speaker output terminal for the audio data Lw (or left audio data L) and the right outside audio data Rw (or right audio data R) are provided, and a left center speaker SLc. The right center speaker SRc, the left outer speaker SLw, and the right outer speaker SRw can be connected.

  As shown in FIG. 13, the switching unit 46c in the DSP 41c includes left audio data L (right audio data R), left center audio data Lc (right center audio data Rc), left outer audio data Lw (right outer audio data). For Rw), it is selected whether to reproduce from the left outer speaker SLw (right outer speaker SRw) or to reproduce from the left center speaker SLc (right center speaker SRc). Specifically, the switching unit 46c switches between the left audio data L and the left outer audio data Lw to be supplied to the left outer speaker SLw, and either the right audio data R or the right outer audio data Rw. Switch SW2c for switching whether the left audio data Lc is supplied to the left outer speaker SRw, the switch SW3c for switching whether the left audio data L or the left central audio data Lc is supplied to the left central speaker SLc, the right audio data R, A switch SW4c for switching which of the right center side audio data Rc is supplied to the right center speaker SRc is included.

FIG. 14 is a flowchart showing the operation of the AV amplifier 20c in this example.
[For audio data (2)]
In the case of the audio data of (2) above, that is, when the left central audio data Lc and the right central audio data Rc are included (the left outer audio data Lw and the right outer audio data Rw are not included). Is determined YES in S62. In the switching unit 46c, the system control unit 23 causes the switch SW1c to select the left audio data L, causes the switch SW2c to select the right audio data R, causes the switch SW3c to select the left center side audio data Lc, and causes the switch SW4c to select the right audio data Rc. The central audio data Rc is selected (S63, S64).

  As a result, the left audio data L is reproduced from the left outer speaker SLw, the right audio data R is reproduced from the right outer speaker SRw, the left central audio data Lc is reproduced from the left central speaker SLc, and the right central speaker SRc. To the right center audio data Rc is reproduced. Therefore, the left audio data L, the right audio data R, the left central audio data Lc, and the right central audio data Rc can be reproduced from appropriate positions.

[For audio data in (3)]
In the case of the audio data of (3) above, that is, when the left outer audio data Lw and the right outer audio data Rw are included (the left central audio data Lc and the right central audio data Rc are not included). Is determined NO in S62 and YES in S65. In the switching unit 46c, the system control unit 23 causes the switch SW1c to select the left outer audio data Lw, causes the switch SW2c to select the right outer audio data Rw, causes the switch SW3c to select the left audio data Lw, and causes the switch SW4c to select the right The audio data Rc is selected (S66, S67).

  As a result, left audio data L is reproduced from the left center speaker SLc, right audio data R is reproduced from the right center speaker SRc, left outer audio data Lw is reproduced from the left outer speaker SLw, and from the right outer speaker SRw. The right outer audio data Rw is reproduced. Therefore, the left audio data L, the right audio data R, the left outer audio data Lw, and the right outer audio data Rw can be reproduced from appropriate positions.

[In the case of (1) audio data]
In the case of the above-described audio data (1), that is, when the left outer audio data Lw and the right outer audio data Rw are not included in the left center audio data Lc and the right center audio data Rc, NO is determined in S62. , NO is determined in S65. In the switching unit 46c, the system control unit 23 causes the switch SW1c to select the left audio data L, causes the switch SW2c to select the right audio data R, causes the switch SW3c to select the left audio data L, and causes the switch SW4c to select the right audio data L. Rc is selected (S68).

  As a result, the left audio data L is reproduced from the left center speaker SLc, the right audio data R is reproduced from the right center speaker SRc, the left audio data L is reproduced from the left outer speaker SLw, and the right audio data R is reproduced from the right outer speaker SRw. Audio data R is reproduced. Note that the terminals to which no audio signal is input can be selected for each of the switches SW1c to SW4c, and the left audio data L is reproduced from only one of the left center speaker SLc and the left outer speaker SLw, and the right center The right audio data R may be reproduced from only one of the side speaker SRc and the right outer speaker SRw.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment. Audio data (and speakers) of channels other than the left audio data L, right audio data R, left central audio data Lc, right central audio data Rc, left outer audio data Lw and right outer audio data Rw are essential to the present invention. Alternatively, audio data of different channels may be included. Further, the AV amplifier 20 may include the function of the DVD player 10, and in this case, the HDMI receiving unit 21 is not necessary. The present invention can also be applied to a television receiver having the functions of the AV amplifier 20 and the display device 30, and the multi-channel audio data in this case may be TV broadcast audio data. Further, the AV amplifier 20 may receive HDMI data from a receiver instead of the DVD player 10. Further, the audio data transmitted to the display device may be transmitted via an optical digital cable or the like instead of being transmitted via the HDMI cable. In this case, the volume setting command may be transmitted via another communication cable. Further, the program may be provided in the form of a program for causing a computer to execute the above operation of the AV amplifier and a recording medium on which the program is recorded. Further, a program for only a part of the operation of the AV amplifier may be provided to the AV amplifier in the form of firmware update. Further, it may be provided in the form of an electronic component such as a DSP or a microcomputer in which a program for only a part of the above operation of the AV amplifier is stored.

  The present invention can be suitably employed in an AV amplifier or the like.

It is a figure which shows arrangement | positioning of AV amplifier 20, the display apparatus 30, and a speaker. 1 is a block diagram showing a configuration of a DVD player 10 and an AV amplifier 20 according to a preferred embodiment of the present invention. 1 is a block diagram showing a configuration of an AV amplifier 20 and a display device according to a preferred embodiment of the present invention. 4 is a block diagram illustrating an audio processing unit 26. FIG. 4 is a block diagram illustrating an audio processing unit 36. FIG. 5 is a flowchart for explaining the operation of the AV amplifier 20. 4 is a flowchart for explaining the operation of the display device 30. It is a flowchart which shows the detail of S18. It is a figure which shows arrangement | positioning of AV amplifier 20, the display apparatus 30, and the speaker by other embodiment. It is a block diagram explaining the audio | voice processing part 26b by other embodiment. It is a flowchart explaining operation | movement of AV amplifier 20b by other embodiment. It is a figure which shows arrangement | positioning of AV amplifier 20 and a speaker by other embodiment. It is a block diagram explaining the audio | voice processing part 26c by other embodiment. It is a flowchart explaining operation | movement of AV amplifier 20c by other embodiment. It is a figure which shows the reproduction | regeneration position of each audio | voice data of multichannel audio | voice data.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 DVD player 20 AV amplifier 21 HDMI receiving part 22 HDMI transmission part 23 System control part 26 Audio | voice processing part 30 Display apparatus 31 HDMI receiving part 33 System control part 41 DSP
42 DAC
43 Volume adjustment unit 44 Amplification processing unit 45 Conversion unit 46 Switching unit 51 DAC
52 Volume adjustment unit 53 Amplification processing unit

Claims (12)

An audio processing device capable of connecting a display device including a display left speaker and a display right speaker, and a left speaker and a right speaker arranged outside the display device,
Channel determining means for determining whether multi-channel audio data including at least left audio data and right audio data includes left center audio data and right center audio data, or left outer audio data and right outer audio data When,
When it is determined that the left center side audio data and the right center side audio data are included in the multi-channel audio data, the left center side audio data and the right center side audio data are transmitted to the display device, and the display left speaker Reproduction control means for reproducing left center side audio data from the right speaker, reproducing right center side audio data from the display right speaker, reproducing left audio data from the left speaker, and reproducing right audio data from the right speaker; With
When it is determined that the left outer audio data and the right outer audio data are included in the multichannel audio data, the reproduction control unit transmits the left audio data and the right audio data to the display device, and the display left speaker. The left audio data is reproduced from the right speaker, the right audio data is reproduced from the display right speaker, the left outer audio data is reproduced from the left speaker, and the right outer audio data is reproduced from the right speaker.   When it is determined that the left center audio data and the right center audio data, neither the left outer audio data and the right outer audio data are included in the multi-channel audio data, the playback control means outputs the left audio from the left speaker. The audio processing apparatus according to claim 1, wherein data is reproduced and right audio data is reproduced from the right speaker. Further comprising display connection determining means for determining whether or not the display device is connected to the audio processing device;
If it is determined that the display device is not connected to the audio processing device, the left audio is output from the left speaker regardless of whether the left outer audio data and the right outer audio data are included in the multichannel audio data. The audio processing apparatus according to claim 1, wherein data is reproduced and right audio data is reproduced from the right speaker. When the display device receives a volume setting command, the volume value of the sound reproduced from the display left speaker and the display right speaker is set to a volume value included in the volume setting command,
When it is determined that multi-channel audio data includes left center audio data and right center audio data, or left outer audio data and right outer audio data, the volume set in the audio processing device The audio processing apparatus according to claim 1, further comprising volume control means for transmitting a volume setting command including a value to the display apparatus.   When it is determined that the multi-channel audio data includes left center audio data, right center audio data, left outer audio data, and right outer audio data, the playback control means Data and right center side audio data are transmitted to the display device, left center side audio data is reproduced from the display left speaker, right center side audio data is reproduced from the display right speaker, and left sound is output from the left speaker. The audio processing apparatus according to claim 1, wherein data is reproduced and right audio data is reproduced from the right speaker. Left center speaker, right center speaker, left outer speaker and right outer speaker can be further connected,
Speaker determination means for determining whether the left center speaker, the right center speaker, the left outer speaker and the right outer speaker are connected to the sound processing device;
When it is determined that multi-channel audio data includes left center audio data and right center audio data and the left center speaker and the right center speaker are not connected, the playback control means The left center side audio data and the right center side audio data are transmitted to the display device, the left center side audio data is reproduced from the display left speaker, the right center side audio data is reproduced from the display right speaker, and Play left audio data from the left speaker, play right audio data from the right speaker,
When it is determined that the left outer audio data and the right outer audio data are included in the multi-channel audio data and the left outer speaker and the right outer speaker are not connected, the playback control means Transmitting data and right audio data to the display device, reproducing left audio data from the display left speaker, reproducing right audio data from the display right speaker, and reproducing left outer audio data from the left speaker; The sound processing apparatus according to claim 1, wherein right outer sound data is reproduced from the right speaker.   The reproduction control means converts the left center audio data and the right center audio data, or the HDMI data that conforms to the HDMI standard including the left audio data, the right audio data, and the video data into the display device. The voice processing apparatus according to claim 1, which transmits the voice processing apparatus. An operation program for a sound processing apparatus capable of connecting a display device including a display left speaker and a display right speaker, and a left speaker and a right speaker arranged outside the display device,
Determining whether the multi-channel audio data including at least left audio data and right audio data includes left center audio data and right center audio data, or left outer audio data and right outer audio data;
When it is determined that the left center side audio data and the right center side audio data are included in the multi-channel audio data, the left center side audio data and the right center side audio data are transmitted to the display device, and the display left speaker Playback control step of playing back left center side audio data from the right speaker, playing back right center side audio data from the display right speaker, playing back left audio data from the left speaker, and playing back right audio data from the right speaker; To the computer,
When it is determined that the left outer audio data and the right outer audio data are included in the multi-channel audio data, the reproduction control step transmits the left audio data and the right audio data to the display device, and the display left speaker. The left audio data is reproduced from the right speaker, the right audio data is reproduced from the display right speaker, the left outer audio data is reproduced from the left speaker, and the right outer audio data is reproduced from the right speaker. An audio reproduction method in an audio reproduction system, comprising: a display device including a display left speaker and a display right speaker; and an audio processing device connected to the left speaker and the right speaker arranged outside the display device,
Determining whether the multi-channel audio data including at least left audio data and right audio data includes left center audio data and right center audio data, or left outer audio data and right outer audio data;
When it is determined that multi-channel audio data includes left center audio data and right center audio data, left center audio data is played from the display left speaker, and right center audio is output from the display right speaker. Playing back data, playing back left audio data from the left speaker, and playing back right audio data from the right speaker;
When it is determined that the left outer audio data and the right outer audio data are included in the multichannel audio data, the left audio data is reproduced from the display left speaker, the right audio data is reproduced from the display right speaker, and Reproducing the left outer audio data from the left speaker and reproducing the right outer audio data from the right speaker. An audio processing device to which a left outer speaker, a right outer speaker, a left center speaker and a right center speaker can be connected,
Channel determining means for determining whether multi-channel audio data including at least left audio data and right audio data includes left center audio data and right center audio data, or left outer audio data and right outer audio data When,
When it is determined that the left center side audio data and the right center side audio data are included in the multi-channel audio data, the left center side audio data is reproduced from the left center side speaker, and the right center side speaker is Side audio data is reproduced, left audio data is reproduced from the left outer speaker, right audio data is reproduced from the right outer speaker, and the left outer audio data and the right outer audio data are included in the multichannel audio data. The left audio data is reproduced from the left central speaker, the right audio data is reproduced from the right central speaker, and the left outer audio data is reproduced from the left outer speaker. An audio processing apparatus comprising: a reproduction control unit that reproduces right outer audio data from a speaker. An operating program for a sound processing device to which a left outer speaker, a right outer speaker, a left center speaker and a right center speaker can be connected,
A channel determination step for determining whether left-center audio data and right-center audio data, or left outer audio data and right outer audio data are included in multi-channel audio data including at least left audio data and right audio data When,
When it is determined that the left center side audio data and the right center side audio data are included in the multi-channel audio data, the left center side audio data is reproduced from the left center side speaker, and the right center side speaker is Side audio data is reproduced, left audio data is reproduced from the left outer speaker, right audio data is reproduced from the right outer speaker, and the left outer audio data and the right outer audio data are included in the multichannel audio data. The left audio data is reproduced from the left central speaker, the right audio data is reproduced from the right central speaker, and the left outer audio data is reproduced from the left outer speaker. Causing the computer to execute a playback control step of playing back the right outside audio data from the speaker. , Voice processing program. A sound reproduction method in a sound processing apparatus to which a left outer speaker, a right outer speaker, a left center speaker and a right center speaker can be connected,
A channel determination step for determining whether left-center audio data and right-center audio data, or left outer audio data and right outer audio data are included in multi-channel audio data including at least left audio data and right audio data When,
When it is determined that the left center side audio data and the right center side audio data are included in the multi-channel audio data, the left center side audio data is reproduced from the left center side speaker, and the right center side speaker is Side audio data is reproduced, left audio data is reproduced from the left outer speaker, right audio data is reproduced from the right outer speaker, and the left outer audio data and the right outer audio data are included in the multichannel audio data. The left audio data is reproduced from the left central speaker, the right audio data is reproduced from the right central speaker, and the left outer audio data is reproduced from the left outer speaker. And a playback control step of playing back the right outer audio data from the speaker.

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