JP2009021663A - Video / audio playback device, video / audio playback system, and video / audio playback method - Google Patents

Abstract

To perform sound field processing suitable for monaural reproduction even when there is a broadcast in which the sound data is the same sound for Lch and Rch, while the channel number information is stereo.
On the television receiver 1, a multiplexed restoration unit 106 restores a multiplexed signal of a selected digital broadcast and separates it into video, audio signals, and additional information having electronic program guide information. When the audio signal is decoded by the audio decoding unit 120 as the audio decoding means, and the audio channel number information obtained from the electronic program guide information or the header information of the audio signal is 2 ch by the audio data comparison unit 120a, The left and right sound data decoded by the sound decoding unit 120 are compared, and when the left and right sound data are the same, the audio control unit 121 as the first audio control means performs, for example, left and right front speakers 129 and 130. Monaural playback from
[Selection] Figure 6

Description

  The present invention relates to a video / audio reproduction device, a video / audio reproduction system, and a video / audio reproduction method, and more particularly to a video / audio reproduction device, a video / audio reproduction system, and a video / audio reproduction method suitable for audio reproduction.

  Television receivers that display digital broadcast video are equipped with multiple external input terminals, video / audio signals from DVDs, video / audio signals from game machines, video / audio signals from video cameras, digital camera By taking in video / audio signals, video / audio signals from a PC (personal computer), etc., it is possible to view video / audio not only from digital broadcast video / audio but also from other devices.

  In addition, some of such television receivers are equipped with a multi-window function that can display a plurality of different images on one screen. Even in a so-called two-screen display in which a digital broadcast video is displayed and a video from a game device is displayed on the right side of the screen, it is possible to simultaneously enjoy the digital broadcast video and the video from the game device. ing.

  Also, for example, a digital broadcast video is displayed on the left side of the screen, a personal computer screen is displayed on the right side of the screen, and information relating to the video can be searched on the Internet while viewing the digital broadcast video. It is possible.

  Naturally, when the screen size is increased, it is possible to enjoy the video of each screen not only in the two-screen display but also in the display of three or more screens.

  In addition, such a television receiver receives an AV signal (audio / visual signal; including a video signal and an audio signal) and additional information (program information such as genre information and channel information) added thereto, There are some which can perform control such as switching to a sound field mode suitable for program contents based on these additional information.

In order to perform control such as switching to a sound field mode suitable for such program contents, Patent Document 1 separates audio encoded data from a received digital broadcast data stream and extracts program-related information. Based on the extracted program related information, means for decoding the separated audio encoded data, an audio processing unit for adjusting the sound field, sound quality or volume for the decoded audio signal, A digital broadcast receiving apparatus has been proposed in which a control unit for controlling an audio processing unit is provided.
JP 2002-27352 A

  As described in the above-mentioned Patent Document 1, by using a digital broadcast that can transmit advanced sound field information by audio multi-channel transmission or the like by controlling the audio processing unit based on the extracted program-related information. The sound field and sound quality according to the channel and program contents can be easily adjusted.

  By the way, in such digital broadcasting, the audio of the video is based on the channel number information obtained from the header information of the audio data of the digital broadcast data stream (or the channel number information obtained from the EPG data of the digital broadcast). It is determined whether the sound is stereo or monaural, and sound field processing suitable for each is performed.

  However, in reality, there is a case where there is a broadcast in which the sound data is the same sound for Lch and Rch, although the channel number information is stereo, and sound field processing is simply performed based on such broadcast channel number information. However, there is a problem that sound field processing suitable for monaural reproduction cannot be performed.

  The present invention has been made in view of such a situation, and an object thereof is to provide a video / audio reproduction device, a video / audio reproduction system, and a video / audio reproduction method capable of solving the above problems.

The video / audio reproduction device of the present invention is a video / audio reproduction device in a television receiver having at least left and right speakers, and restores a multiplexed signal of a selected digital broadcast to obtain a video signal, an audio signal, and an electronic program guide. Multiplex recovery means for separating each additional information having information, audio decoding means for decoding the audio signal, and audio audio channel number information obtained from the electronic program guide information or the header information of the audio signal 2ch, audio data comparison means for comparing left and right sound data decoded by the audio decoding means, and stereo reproduction or monaural from the left and right speakers according to the comparison result by the audio data comparison means Audio control means for performing reproduction, and the left and right sound data are the same in the comparison by the sound data comparison means. If it, characterized in that the mono reproduction is performed by the left and right speakers by the audio control unit.
The video / audio reproduction device according to the present invention is a video / audio reproduction device in a television receiver having at least left and right speakers and a center speaker, and restores a multiplexed signal of a selected digital broadcast to obtain a video signal, an audio signal, Multiplex recovery means for separating each additional information having electronic program guide information, audio decoding means for decoding the audio signal, and audio of the video obtained from the electronic program guide information or header information of the audio signal When the channel number information is 2ch, the audio data comparing means for comparing the left and right sound data decoded by the audio decoding means, and the left and right speakers and the center speaker according to the comparison result by the audio data comparing means Audio control means for performing stereo reproduction or monaural reproduction from the audio data comparing means, If the data of the left and right sound the same in compare, characterized in that the mono reproduction is performed by the left and right speakers and a center speaker by said audio control unit.
The video / audio reproduction system of the present invention is a video / audio reproduction system for a television receiver having at least left and right speakers and an audio device connected to the television receiver and having at least left and right external speakers, The machine restores the multiplexed signal of the selected digital broadcast and separates it into each of the additional information having the video signal, the audio signal, and the electronic program guide information, and the audio for decoding the audio signal When the audio channel number information of the video obtained from the decoding unit and the electronic program guide information or the header information of the audio signal is 2 ch, the left and right sound data decoded by the audio decoding unit are compared. Stereo reproduction from the left and right speakers according to the comparison result by one audio data comparison means and the first audio data comparison means Comprises first audio control means for performing monaural reproduction, and the audio device is connected to the television receiver via at least an HDMI cable for receiving an audio signal from the television receiver, and demodulates the audio signal. When the audio demodulator and the audio channel number information obtained from the electronic program guide information or the header information of the audio signal are 2 ch, the left and right sound data demodulated by the audio demodulator is compared. 2 audio data comparison means, and second audio control means for performing stereo reproduction or monaural reproduction from the left and right external speakers according to the comparison result by the second audio data comparison means, and according to the audio reproduction instruction In the comparison by the first audio data comparison means or the second audio data comparison means, the left and right sound data are the same. If it is, wherein the monaural reproduction is performed by the left and right speakers or the right and left external speaker by said first audio control unit or the second audio control unit.
The video / audio reproduction system of the present invention is a video / audio reproduction system in a television receiver having at least left and right speakers and a center speaker, and an audio device connected to the television receiver and having at least left and right external speakers and an external center speaker. The television receiver restores a multiplexed signal of a selected digital broadcast and separates it into each of additional information having a video signal, an audio signal, and electronic program guide information; and When audio channel number information obtained from audio decoding means for decoding an audio signal and video audio information obtained from the electronic program guide information or the header information of the audio signal is 2 ch, left and right decoded by the audio decoding means A first voice data comparing means for comparing sound data and a comparison result by the first voice data comparing means. First audio control means for performing stereo reproduction or monaural reproduction from the left and right speakers and the center speaker, and the audio device receives at least an audio signal from the television receiver to the television receiver. And the audio demodulating means for demodulating the audio signal, and the audio demodulating means if the audio channel number information obtained from the electronic program guide information or the header information of the audio signal is 2 ch. Second audio data comparison means for comparing demodulated left and right sound data, and stereo reproduction or monaural reproduction from the left and right external speakers and the external center speaker according to the comparison result by the second audio data comparison means Second audio control means for controlling the first audio data according to the audio reproduction instruction. When the left and right sound data are the same in the comparison by the data comparison means or the second sound data comparison means, the left and right speakers and the center speaker or the left and right sound data are obtained by the first audio control means or the second audio control means. Monaural reproduction is performed by an external speaker and an external center speaker.
The audio device is connected to the television receiver via an optical cable so that an audio signal from the television receiver is transmitted to the audio device via the HDMI cable and / or the optical cable. Can do.
The video / audio reproduction method of the present invention is a video / audio reproduction method in a television receiver having at least left and right speakers, wherein a multiplexed signal of a selected digital broadcast is restored by a multiplexing restoration means, and a video signal, A step of separating each of the audio signal and additional information having electronic program guide information; a step of decoding the audio signal by audio decoding means; and a header of the electronic program guide information or audio signal by the audio data comparison means When the channel number information of the audio of the video obtained from the information is 2ch, the comparison result of the audio data comparing means by the step of comparing the left and right sound data decoded by the audio decoding means and the audio control means And performing stereo reproduction or monaural reproduction from the left and right speakers according to the audio data comparison If the data of the left and right sound in comparison by stage are the same, wherein the monaural reproduction is performed by the left and right speakers by the audio control unit.
The video / audio reproduction method of the present invention is a video / audio reproduction method in a television receiver having at least left and right speakers and a center speaker, wherein a multiplexed signal of a selected digital broadcast is restored by a multiplexing restoration means, A step of separating each of the video signal, the audio signal, and the additional information having the electronic program guide information; a step of decoding the audio signal by an audio decoding unit; and an audio data comparing unit, the electronic program guide information or the audio When the audio channel number information obtained from the header information of the signal is 2ch, the audio data comparing unit includes a step of comparing the left and right sound data decoded by the audio decoding unit, and the audio control unit. Depending on the result of comparison, stereo playback or monaural playback from the left and right speakers and the center speaker is performed. That has a step, the audio data comparison if the data of the left and right sound in the comparison by means of the same, characterized in that the mono reproduction is performed by the left and right speakers and a center speaker by said audio control unit.
The video / audio reproduction method of the present invention is a video / audio reproduction method for a television receiver having at least left and right speakers and an audio device connected to the television receiver and having at least left and right external speakers, wherein the television reception is performed. The machine restores the multiplexed signal of the selected digital broadcast by the multiplexing restoration means and separates it into the additional information having the video signal, the audio signal, and the electronic program guide information, and the voice decoding means When the audio channel number information obtained from the electronic program guide information or the header information of the audio signal is 2ch by the step of decoding the audio signal and the first audio data comparator, the audio decoding means Comparing the decoded left and right sound data with the first audio control means, the first audio data comparing means And a step of causing the left and right speakers to perform stereo reproduction or monaural reproduction according to the comparison result, wherein the audio device has an HDMI cable for receiving at least an audio signal from the television receiver. The audio channel number information of the video obtained from the electronic program guide information or the header information of the audio signal is obtained by the second audio data comparing unit and the step of demodulating the audio signal by the audio demodulating unit. The left and right sound data demodulated by the sound demodulating means is compared with the second audio control means by the second audio data comparing means according to the comparison result by the second sound data comparing means. A step of performing stereo reproduction or monaural reproduction, and comparing the first audio data according to an audio reproduction instruction If the left and right sound data are the same in the stage or the comparison by the second audio data comparison means, monaural reproduction by the left and right speakers or the left and right external speakers by the first audio control means or the second audio control means Is performed.
The video / audio reproduction method of the present invention is a video / audio reproduction method in a television receiver having at least left and right speakers and a center speaker, and an audio device connected to the television receiver and having at least left and right external speakers and an external center speaker. The television receiver restores the selected digital broadcast multiplexed signal by the multiplexing restoring means, and separates the multiplexed signal into video signal, audio signal, and additional information having electronic program guide information. And the step of decoding the audio signal by the audio decoding means and the audio audio channel number information obtained from the electronic program guide information or the header information of the audio signal by the first audio data comparison means is 2 ch. In this case, the step of comparing the left and right sound data decoded by the audio decoding means and the first audio control Means for performing stereo reproduction or monaural reproduction from the left and right speakers and the center speaker in accordance with the comparison result by the first audio data comparison means, and the audio device has at least the television receiver. Connected via an HDMI cable for receiving an audio signal from the television receiver, demodulating the audio signal by audio demodulating means, and the electronic program guide information or the header of the audio signal by second audio data comparing means When the audio channel number information obtained from the information is 2ch, the step of comparing the left and right sound data demodulated by the audio demodulating unit and the second audio control unit, the second audio data comparing unit Stereo playback from the left and right external speakers and the external center speaker according to the comparison result Includes a step of performing monaural reproduction, and when the left and right sound data are the same in the comparison by the first sound data comparison means or the second sound data comparison means according to a sound reproduction instruction, The monaural reproduction is performed by the left and right speakers and the center speaker or the left and right external speakers and the external center speaker by the audio control means or the second audio control means.
In the video / audio reproduction device, video / audio reproduction system, and video / audio reproduction method of the present invention, the multiplexed signal of the selected digital broadcast is restored by, for example, the multiplexing restoration means, and the video signal, the audio signal, and the electronic program guide information are restored. The audio signal is decoded by the audio decoding means, and the audio channel number information obtained from the electronic program guide information or the header information of the audio signal is obtained by the comparison by the audio data comparison means. In the case of 2ch, the left and right sound data decoded by the sound decoding means are compared, and when the left and right sound data are the same by the comparison by the sound data comparing means by the audio control means, monaural by the left and right speakers Playback is performed.

  According to the video / audio reproduction device, the video / audio reproduction system, and the video / audio reproduction method of the present invention, when the channel number information is 2 ch, the left and right sound data decoded by the audio decoding means by the audio data comparison means are compared. When the left and right sound data are the same as compared by the audio data comparing means by the audio control means, the monaural reproduction is performed by the left and right speakers. Can perform sound field processing suitable for monaural reproduction even when there is a broadcast with the same sound in Lch and Rch.

  In the present embodiment, the multiplexed signal of the selected digital broadcast is restored by the multiplexing restoration means, separated into each of the video signal, the audio signal, and the additional information having the electronic program guide information, and the audio decoding means When the signal is decoded and the channel number information of the audio of the video obtained from the electronic program guide information or the header information of the audio signal is 2 ch by the comparison by the audio data comparison unit, the left and right decoded by the audio decoding unit The sound data is compared, and when the left and right sound data is the same by the audio control means by the audio data comparison means, monaural reproduction is performed by the left and right speakers.

  In this way, by comparing whether the left and right sound data are the same by the comparison by the sound data comparison means, the sound data is the same sound in the Lch and Rch while the channel number information is stereo. Even if there is a sound field, not only the presence of the broadcast can be confirmed, but sound field processing suitable for monaural reproduction can be performed.

  Also, in monaural reproduction, either one of the left and right sound data may be used, so half the processing can be performed compared to Lch and Rch data processing in normal stereo reproduction. .

  Details of the embodiments of the present invention will be described below. FIG. 1 is a diagram for explaining an embodiment of the video / audio reproduction system of the present invention.

  The video / audio reproduction system shown in FIG. 1 connects a television receiver 1 having a high definition multimedia interface (HDMI) terminal 10 and an audio device 2 having an HDMI terminal 14 with an HDMI cable 6 and an optical cable 18. An AV signal and a program information signal are exchanged to reproduce video and audio.

  As shown in FIG. 2, the video / audio reproduction system of the present invention connects the television receiver 1 having the HDMI terminals 11 and 12 and the recorders 3 and 4 having the HDMI terminals 15 and 16 to the HDMI cable 7, It is also possible to adopt a configuration in which the video signal and the audio are reproduced by transmitting and receiving AV signals and program information signals.

  In the video / audio reproduction system according to the present invention, as shown in FIG. 3, a television receiver 1 having an HDMI terminal 10 and an audio device 2 having an HDMI terminal 14 are connected by an HDMI cable 6 and an optical cable 18. In addition, the HDMI terminal 13 of the audio device 2 and the HDMI terminal 17 of the recorder 5 are connected by the HDMI cable 9 so as to exchange AV signals and program information signals and to reproduce video and audio. Is also possible.

  The above-described television receiver 1 in FIGS. 1 to 3 can directly receive and reproduce a broadcast program, and can also program based on AV signals input from external devices via HDMI cables 6 to 9. Can be played. In addition, the audio device 2 can reproduce audio based on audio signals input via the HDMI cables 6 to 9 and the optical cable 18. In addition, the recorders 3 to 5 can directly receive, record and reproduce AV signals of broadcast programs, and can output the reproduced AV signals to the outside via the HDMI cables 6 to 9. It is. Although not shown, the recorders 3 to 5 can input and record and reproduce AV signals from the outside.

  The above-described HDMI terminals 10 to 17 in FIGS. 1 to 3 are developed by arranging DVI (Digital Visual Interface) terminals of display connection technology for AV (audio / visual) related devices, and are for next-generation televisions. This is a connection terminal based on the interface standard. The HDMI terminal can send video signals, audio signals, and control signals together with a single cable, and the control signals can be transmitted in both directions, allowing simple connection between devices. The remote controller 117 can control a plurality of AV devices (audio / visual devices).

  FIG. 4 shows the detailed connection relationship of the HDMI cables 6 to 9 in FIGS.

  In FIG. 4, reference numeral 21 denotes an HDMI source which is a sending side of video data and audio data, and 22 denotes an HDMI sink which is a receiving side of video data and audio data. For example, in FIG. 2, the recorder 3 and the recorder 4 correspond to the HDMI source 21, and the television receiver 1 corresponds to the HDMI sink 22. The HDMI source 21 includes an HDMI transmitter 23, and the HDMI sink 22 includes an HDMI receiver 24. Reference numeral 25 denotes an HDMI cable having HDMI terminals 26 and 27 at both ends.

  The video signal, audio signal, and control status signal input to the HDMI transmitter 23 are serially transmitted to the HDMI sink 22 through the TMDS channel 28 (TMDS channels 0 to 2 and TMDS clock channel). The HDMI sink 22 reproduces the video signal, the audio signal, and the control state signal transmitted through the TMDS channel 28 based on the clock signal transmitted through the TMDS clock channel. Note that the audio signal and the control state signal are transmitted using the blanking period of the video signal.

  The HDMI cable 25 is also provided with a CEC (Consumer Electronics Control) line 29 and a DDC (Display Data Channel) line 30. The CEC line 29 and the DDC line 30 are bidirectional lines, and control signals are exchanged between devices through these signal lines.

  For example, as will be described later, in order to switch the sound field mode of the television receiver 1 and the audio device 2, the program genre information and the number of channels (additions related to contents) between the television receiver 1, the audio device 2, and the recorders 3 to 5 are performed. Control signals corresponding to (information) are exchanged through the CEC line 29. In addition, for example, the television receiver 1 and the recorders 3 to 5 can change the video display specifications, audio output specifications, and the like of an externally connected device directly or indirectly from the EDID (Extended Display Identification) -ROM 31 to the DDC line. The video signal and the audio signal that are read through 30 and conform to the specifications of the connected device are transmitted.

  FIG. 5 shows a schematic control block diagram corresponding to the configuration of FIG.

  In FIG. 5, reference numerals 41 to 43 denote host CPUs. Reference numeral 44 is a monitor microcomputer, and 45 and 46 are front microcomputers. Reference numerals 47 to 49 denote interface circuits. Reference numerals 50 and 51 denote HDMI receiving LSIs. Reference numerals 52 and 53 denote HDMI transmission LSIs. The interfaces 47, 48 and 49 are connected by a CEC line. The HDMI receiving LSI is an LSI that is an HDMI receiver 24, and the HDMI transmitting LSIs 52 and 53 are LSIs that are an HDMI transmitter 23.

  The HDMI transmission LSI 53 is connected to the HDMI transmission LSI 53 as a transmission destination. The HDMI transmission LSI 52 is connected to the HDMI transmission LSI 52 as a transmission destination. The HDMI transmission LSI 53 is connected to the HDMI reception LSI 51 so that the HDMI reception LSI 51 can receive the data received from the HDMI transmission LSI 52.

  The host CPUs 41 to 43 can communicate with each other via the monitor microcomputer 44, the front microcomputers 45 and 46, the interface circuits 47 to 49, and the CEC line. In addition, the host CPUs 41 to 43 can control the HDMI transmission LSIs 52 and 53 to transmit a video signal, an audio signal, and a control state signal via the TMDS channel. Further, the HDMI receiving LSIs 50 and 51 can be controlled to receive a video signal, an audio signal, and a control status signal via the TMDS channel.

  Since the HDMI cable 6 can transmit only one direction of the video signal, the audio signal, and the control state signal, when the TV receiver 1 reproduces the audio of the program received from the broadcasting station through the speaker of the audio device 2, An optical cable 18 for sending audio data from the television receiver 1 to the audio device 2 is provided. Reference numerals 54 and 55 denote optical cable interfaces.

  For example, when the television receiver 1 receives the video signal and audio signal of the recorder 5 and displays and outputs the video according to a command from a remote controller 117 described later operated by the user, the host CPU 41 of the television receiver 1 is used. Sends a control signal to the host CPU 43 of the recorder 5 to transmit a video signal and an audio signal.

  This control signal is transmitted to the host CPU 43 via the monitor microcomputer 44, the interface circuit 47, the CEC line, the interface circuit 49, and the front microcomputer 46. Receiving the control signal from the host CPU 41, the host CPU 43 controls the HDMI transmission LSI 52 to transmit the video signal and the audio signal to the television receiver 1. The video signal and audio signal transmitted from the HDMI transmission LSI 52 are temporarily received by the HDMI reception LSI 51 of the audio device 2. At this time, the host CPU 42 determines that the received signal is not directed to itself, and transmits the video signal and the audio signal from the HDMI transmission LSI 53 to the television receiver 1 again. The video signal and the audio signal transmitted from the HDMI transmitting LSI 53 are received by the HDMI receiving LSI 50 of the television receiver 1, and when it is determined that the signal is transmitted to itself, the received data is captured.

  The television receiver 1 can perform video display and audio output based on the video signal and audio signal from the recorder 5 in this way. Also, the program genre information and the number of channels (additional information related to the content) reproduced by the recorder 5 are transferred from the host CPU 43 of the recorder 5 to the host CPU 41 of the television receiver 1, the front microcomputer 46, the interface circuit 49, the CEC line, and the interface circuit 47. And transmitted via the monitor microcomputer 44.

  The television receiver 1 controls the speaker output mode to a configuration suitable for the program according to the program genre information and the number of channels (additional information regarding the content). As another means, the program genre information reproduced from the recorder 5 and the number of channels (additional information regarding the content) itself are not sent, but the speaker output mode becomes suitable for the program based on this information. "Control information based on program information" (the control information based on program information here is information for controlling the sound field mode corresponding to the program among a plurality of sound field modes). Commands etc. may be sent.

  As another example, for example, an image is displayed on the television receiver 1 based on the video signal of the recorder 5 in accordance with a command from a remote controller 117 (described later) operated by the user, and the audio device is based on the audio signal of the recorder 5. 2, the host CPU 41 sends a control signal to the host CPU 43 of the recorder 5 so that the video signal is transmitted to the television receiver 1 and the audio signal is transmitted to the audio device 2.

  This control signal is transmitted to the host CPU 43 via the monitor microcomputer 44, the interface circuit 47, the CEC line, the interface circuit 49, and the front microcomputer 46. The host CPU 43 that has received the control signal from the host CPU 41 controls the HDMI transmission LSI 52 to transmit a video signal to the television receiver 1 and transmit an audio signal to the audio device 2. The video signal and audio signal transmitted from the HDMI transmission LSI 52 are temporarily received by the HDMI reception LSI 51 of the audio device 2.

  At this time, the host CPU 42 determines that the received video signal is not intended for itself, and transmits the video signal from the HDMI transmission LSI 53 to the HDMI reception LSI 50 of the television receiver 1 again. The video signal transmitted from the HDMI transmission LSI 53 is received by the HDMI reception LSI 50 of the television receiver 1. Then, the host CPU 41 determines that the video signal has been transmitted to the host CPU 41 and captures the received data. In this way, the television receiver 1 displays the video on its own video table.

  On the other hand, since the host CPU 42 determines that the audio signal is directed to itself, it is captured as self-directed speech data, and the audio device 2 outputs speech from its own speaker based on the captured speech data. Also, the program genre information and the number of channels (additional information related to the content) reproduced by the recorder 5 are transferred from the host CPU 43 of the recorder 5 to the host CPU 42 of the audio device 2 to the front microcomputer 46, the interface circuit 49, the CEC line, the interface circuit 48, It transmits via the front microcomputer 45.

  The audio device 2 controls the speaker output mode to a configuration suitable for the program according to the program genre information and the number of channels (additional information regarding the content). As another means, the program genre information reproduced from the recorder 5 and the number of channels (additional information regarding the content) itself are not sent, but a program in which the speaker output mode is suitable for the program based on this information. Control information based on the information may be sent.

  Thus, based on the video signal and audio signal of the recorder 5, video can be displayed by the television receiver 1 and audio can be output by the audio device 2. Further, the host CPU 43 converts the program genre information and the number of channels (additional information related to the content) via the CEC line of the HDMI cable 9 or the program information such that the speaker output mode is suitable for the program based on this information. Send control information based. Receiving these pieces of information, the audio device 2 controls the speaker output mode to a configuration suitable for the program.

  As still another example, for example, the host receiver 41 of the television receiver 1 receives a broadcast program from a broadcasting station and receives a video in response to a command from a remote controller 117 described later operated by the user. When displaying on the television receiver 1 and outputting audio from the audio device 2, video is displayed on the display unit of the television receiver 1 by normal processing of the television receiver 1, and audio is a speaker provided in the television receiver. The audio data is sent to the audio device 2 through the optical cable 18 instead.

  Further, the host CPU 41 transmits the program genre information and the number of channels (additional information related to the content) to the host CPU 42 of the audio device 2 via the monitor microcomputer 44, the interface circuit 47, the CEC line, the interface circuit 48, and the front microcomputer 45. The audio device 2 controls the speaker output mode to a configuration suitable for the program according to the program genre information and the number of channels (additional information regarding the content). As another means, the television receiver 1 does not send the program genre information or the number of channels (additional information regarding the content) itself, but program information that makes the speaker output mode suitable for the program based on this information. Control information based on may be sent.

  Thereby, the video of the broadcast program received by the television receiver 1 is displayed on the display unit 109 (to be described later) of the television receiver 1, and the sound is output from the speaker of the audio device 2 in the sound field mode corresponding to the content of the broadcast program. Will be able to.

  As described above, the television receiver 1, the audio device 2, and the recorder 5 that are interconnected by the HDMI cable and the optical cable can realize various playback modes by sending operation signals to the television receiver 1 using the remote controller 117 described later. become. In addition to the above playback mode examples, various playback modes are possible. In this case, an optical cable is additionally provided at a location where audio data needs to be transmitted and received bidirectionally in order to realize the various playback modes. .

  FIG. 6 is a diagram showing in more detail the control configuration of the television receiver 1, audio device 2, and recorder 5 in the configuration of FIG.

  As shown in FIG. 6, the television receiver 1 includes an antenna 104, a tuner 105, a multiplexing restoration unit 106, a video decoding unit 107, an audio decoding unit 120, an audio data comparison unit 120a, and a content information restoration unit 111. , Display unit 109, audio control unit 121, system controller 115, left and right front speakers 129 and 130, center speaker 131, subwoofer 132, remote control light receiving unit 116, remote control 117, and amplifiers 125 to 128. A volume 124, a memory 118, an operation unit 119, a video signal processing unit 108, a selector 112, an HDMI reception LSI 110, a digital audio interface modulation unit 113, a light emitting element 114, a bidirectional interface circuit 133, Equipped with EDID-ROM 134 To have.

  The tuner 105 selects a channel having a desired frequency from the broadcast signal received by the antenna 104, and performs demodulation processing. Note that broadcast signals received by the antenna 104 are terrestrial digital broadcast, BS digital broadcast, 110-degree CS digital broadcast, and the like, and signals demodulated by the tuner 105 are content video and audio signals and additional information related to the content. The information is output to the multiplexing restoration unit 106 as a multiplexed signal that is time-division combined. The content is not limited to a program supplied by a broadcast signal from a broadcasting station, but includes a program obtained via a network such as the Internet. In this case, the content video signal, audio signal, and A multiplexed signal obtained by time-division-combining additional information related to the content is output to the multiplexing restoration unit 106.

  The multiplexing / restoring unit 106 separates a video signal, an audio signal, and additional information of a program to be viewed based on the multiplexed signal input from the tuner 105 (or a network or a recording medium playback device). The separated video signal is output to the video decoding unit 107, the separated audio signal is output to the audio decoding unit 120, and the separated additional information is output to the content information restoration unit 111. The additional information is information such as a genre code multiplexed in the input signal, EPG (Electronic Programming Guide) which is electronic program guide information, and the content genre (“movie”, “drama”, “music”). , “Documentary”, “News”, etc.).

  The video decoding unit 107 decodes the video signal input from the multiplexing / restoration unit 106, and the decoded video signal is output to the display unit 109 via the video signal processing unit 108 and displayed. The video signal processing unit 108 functions as a selector that selects and outputs one of the input video signals when there are a plurality of input video signals, and a function of synthesizing the video so that multi-screen display can be performed based on the plurality of input video signals. have. As the display unit 109, display means such as a liquid crystal display, a plasma display, or a CRT is used.

  The audio decoding unit 120 decodes the audio signal input from the multiplexing / restoration unit 106 via the selector 112, and the decoded audio signal is processed by the audio control unit 121 and then amplified via the volume 124. Amplified at 125 to 128 and output from the left and right front speakers 129 and 130, the center speaker 131, and the subwoofer 132. Although not shown in the figure, when another screen is displayed and each person views each screen, the sound of the main screen is output from the speaker and the sound of the sub screen is separated from the multiplexing / restoration unit 106. It can also be configured to be extracted and output for headphones or earphones.

  The content information restoration unit 111 decodes the additional information input from the multiplexing restoration unit 106, extracts a genre from the decoded additional information, and outputs the extracted genre to the system controller 115 as content information. . When a plurality of genres are set for the same content, that is, when the same content includes a plurality of genres as additional information, the extracted plurality of genres are output to the system controller 115.

  When the audio data comparison unit 120a is based on the EPG restored by the multiplexing restoration unit 106 or the audio channel number information obtained from the header information of the audio data, the channel number information is 2ch (stereo). , Lch and Rch sound data are compared or not. Here, if the sound data of Lch and Rch are different, the audio channel number information obtained from the restored EPG or the header information of the audio data and the sound data are compatible. A comparison result indicating that the audio control unit 121 is adapted is output.

  On the other hand, when the sound data of Lch and Rch are the same, the audio channel number information obtained from the restored EPG or audio data header information and the sound data do not match. . In this case, although the number-of-ch information is 2ch (stereo), the audio data is monaural, so a comparison result indicating that the audio control unit 121 is not compatible is output.

  The audio control unit 121 is a sound quality adjusting unit that processes the audio signal decoded by the audio decoding unit 120, and includes a channel number conversion processing unit 191, a sound field change processing unit 192, an enhancement processing unit 193, and an equalizer. And a processing unit 194.

  The channel number conversion processing unit 191 has a function of converting the number of input channels of the audio signal decoded by the audio decoding unit 120. As the channel number conversion process, for example, a 5.1ch audio signal is converted to 3.1ch or 1ch, 2ch audio signal to 1ch, 3.1ch audio signal to 1ch, downmix processing, 5.1ch audio signal to 3.1ch or 2ch, virtual surround processing, 2ch audio signal The matrix decoding process for converting the sound signal to 3.1ch or 5.1ch is performed, and the stereo conversion process for converting the audio signal of 1ch to 2ch is performed.

  When the channel number conversion processing unit 191 receives the comparison result that the audio data is monaural even though the channel number information from the audio data comparison unit 120a is 2ch (stereo), the channel number conversion processing unit 191 receives the audio signal of 2ch. Monaural conversion processing for converting the sound signal into a 1ch audio signal. Details of audio reproduction by monaural conversion processing will be described later.

  The sound field change processing unit 192 has a function of changing the sound field, that is, the listening environment, for example, a virtual surround process that feels as if there is a sound source behind, even though there is no speaker behind, A speaker position changing process for moving the virtual speaker position to the outside of the speaker is performed.

  The processing by the channel number conversion processing unit 191 and the sound field change processing unit 192 is processing for realizing each sound field mode such as virtual surround or prologic 2 (registered commercial law).

  The enhancement processing unit 193 has a function of enhancing the audio output from the center speaker 131 more than the audio output from other speakers. For example, the enhancement processing unit 193 amplifies only the audio signal output from the center speaker 131, the center A balance adjustment process for amplifying the audio signal output from the speaker 131 and reducing the audio signal output from another speaker is performed. The sound field mode in which the sound output from the center speaker 131 is emphasized more than the sound output from other speakers is referred to as “voice enhancement mode”.

  The equalizer processing unit 194 has a function of controlling the sound quality by increasing / decreasing the gain for each frequency band, performing directivity correction processing for correcting the frequency characteristics depending on the directivity of the front speakers 129 and 130, and amplifying the bass. Perform bass enhancement processing.

  The volume 124 controls the sound pressure (volume) of each speaker according to an instruction from the system controller 115. The remote control light receiving unit 116 receives an operation signal (infrared rays) from the remote control 117, converts the received operation signal into an electrical signal, and outputs the electrical signal to the system controller 115.

  The memory 118 stores the content information extracted by the content information restoring unit 111, and also stores a sound field mode table in which sound field modes are defined according to the content genre and the number of channels.

  The HDMI receiving LSI 110 separates and reproduces the video signal and the video signal from the signal received via the HDMI cable 6, outputs the video signal to the video signal processing unit 108, and outputs the audio signal to the selector 112.

  The video signal processing unit 108 selects either a video signal from the video decoding unit 107 or a video signal from the HDMI receiving LSI 110 according to an instruction from the system controller 115 and outputs the selected video signal to the display unit 109. For example, when there is an instruction to display two screens from the system controller 115, the video signal processing unit 108 outputs the video signal from the video decoding unit 107 and the video signal from the HDMI receiving LSI 110 to the display unit 109. For example, a two-screen display instruction from the system controller 115 to the video signal processing unit 108 is executed in response to a two-screen display operation instruction from the remote controller 117.

  In addition, here, the video signal processing unit 108 is shown in the case where the two video signals of the video signal from the video decoding unit 107 and the video signal from the HDMI receiving LSI 110 are taken in. Of course, the above video signal may be captured. Here, when three or more video signals are taken into the video signal processing unit 108, if there is an operation instruction for so-called multi-screen display of three or more screens from the remote controller 117, the video signal processing is performed according to an instruction from the system controller 115. The unit 108 outputs the three or more video signals to the display unit 109.

  In such a two-screen display or a so-called multi-screen display of three or more screens, for example, a program for causing the memory 118 to perform these two-screen display or multi-screen display is stored, and in response to an operation instruction from the remote controller 117. Thus, these two-screen display or multi-screen display may be selected.

  The selector 112 selects either the audio signal from the multiplexing / restoration unit 106 or the audio signal from the HDMI receiving LSI 110 according to an instruction from the system controller 115 to select the audio decoding unit 120 and the digital audio interface modulation unit. It outputs to 113.

  The digital audio interface modulation unit 113 modulates the audio data input from the selector 112 into an optical cable transmission signal and outputs it to the light emitting element 114. The light emitting element 114 emits light according to a signal from the digital audio interface modulation unit 113, and this light is transmitted toward the audio device 2 through the optical cable 18.

  A bidirectional interface circuit 133 is provided between the system controller 115 and the CEC line of the HDMI cable 6 to constitute a bidirectional buffer circuit for signals to be transmitted and received.

  The video display specifications and audio output specifications of the television receiver 1 are stored in the EDID-ROM 134, and these video display specifications or audio outputs are output to the audio device 2 and the recorder 5 via the DDC lines of the HDMI cables 6 and 9. Communicate specification information. Although not shown, since the HDMI terminal has a hot plug detection terminal, when the HDMI terminal is connected, the video display specification or audio output specification information is stored in the audio device using the hot plug detection function. 2 or the recorder 5.

  The audio device 2 includes a system controller 156, a selector 142, an audio demodulator 143, an audio data comparator 143a, an audio controller 144, a volume 147, amplifiers 148 to 151, and left and right front speakers 152. 153, a center speaker 154, a subwoofer 155, an HDMI receiving LSI 150, an HDMI transmitting LSI 160, a light receiving element 140, a digital audio interface demodulator 141, a bidirectional interface circuit 157, and an EDID-ROM 158. It has.

  When an audio signal from the light emitting element 114 is input to the light receiving element 140 of the audio device 2 via the optical cable 18, the light receiving element 140 converts the optical signal into an electric signal and outputs it to the digital audio interface demodulation unit 141. The digital audio interface demodulator 141 demodulates the signal modulated for optical transmission, and the demodulated signal is input to the audio demodulator 143 via the selector 142 and demodulated as an audio signal. The demodulated audio signal is input to the audio control unit 144.

  Similar to the above-described audio data comparison unit 120a, the audio data comparison unit 143a is based on the EPG restored by the multiplexing restoration unit 106 or the audio channel number information obtained from the header information of the audio data. When the channel number information is 2ch (stereo), it is compared whether the sound data of Lch and Rch are different or the same. Here, if the sound data of Lch and Rch are different, the audio channel number information obtained from the restored EPG or the header information of the audio data and the sound data are compatible. A comparison result indicating that the audio control unit 141 is adapted is output.

  On the other hand, when the sound data of Lch and Rch are the same, the audio channel number information obtained from the restored EPG or audio data header information and the sound data do not match. . In this case, although the number-of-ch information is 2ch (stereo), the audio data is monaural, so a comparison result indicating that the audio control unit 141 is not compatible is output.

  The audio signal input to the audio control unit 144 is processed by the audio control unit 144 and then amplified by the amplifiers 148 to 151 via the volume 147, and the left and right front speakers 152 and 153, the center speaker 154, and the subwoofer 155. Audio output. The volume 147 controls the sound pressure of each speaker according to an instruction from the system controller 156.

  The audio control unit 144 performs processing on the audio signal demodulated by the audio demodulation unit 143, and includes a channel number conversion processing unit 181, a sound field change processing unit 182, an enhancement processing unit 183, and an equalizer processing unit 184. It consists of.

  The channel number conversion processing unit 181 has a function of converting the number of channels of the audio signal demodulated by the audio demodulation unit 143. As the channel number conversion process, for example, a 5.1ch audio signal is converted to 3.1ch or 1ch. 2ch audio signal to 1ch, 3.1ch audio signal to 1ch downmix processing, 5.1ch audio signal to 3.1ch or 2ch virtual surround processing, 2ch audio signal to 3ch A matrix decoding process for converting to .1ch or 5.1ch, and a stereo conversion process for converting a 1ch audio signal to 2ch.

  Similarly to the above-described channel number conversion processing unit 191, the channel number conversion processing unit 181 has monaural audio data even though the channel number information from the audio data comparison unit 143a is 2ch (stereo). When the comparison result is received, monaural conversion processing is performed for converting a 2ch audio signal into a 1ch audio signal.

  The sound field change processing unit 182 has a function of changing the sound field, that is, the listening environment, for example, a virtual surround process that feels as if there is a sound source behind, even though there is no speaker behind, A speaker position changing process for moving the virtual speaker position to the outside of the speaker is performed.

  Similarly to the above-described sound field change processing unit 192, the sound field change processing unit 182 is based on, for example, a two-screen display operation instruction from the remote controller 117 and an audio output instruction for the video on either screen. In response to an instruction from the system controller 156, the sound field of the video on either screen is changed. As described above, this sound field change is different from virtual surround processing or the like. For example, when a two-screen video is viewed at the center of the screen, the position of the sound produced by a person in either video Alternatively, the position of sound or the like (sound from a car or other object sound) generated in the video is matched with the position of sound from the left and right front speakers 152 and 153, for example.

  The processing by the channel number conversion processing unit 181 and the sound field change processing unit 182 realizes each sound field mode in the same manner as the channel number conversion processing unit 191 and the sound field change processing unit 192 described above.

  The processing by the enhancement processing unit 183 realizes the “voice enhancement mode” in the same manner as the enhancement processing unit 193.

  Similar to the equalizer processing unit 194, the equalizer processing unit 184 has a function of controlling the sound quality by increasing / decreasing the gain for each frequency band, and correcting the frequency characteristics due to the directivity of the front speakers 152, 153. In addition to processing, bass enhancement processing for amplifying bass is performed.

  A bidirectional interface circuit 157 is provided between the system controller 156 and the CEC line of the HDMI cables 6 and 9 to constitute a bidirectional buffer circuit for signals to be transmitted and received.

  The EDID-ROM 158 stores the audio output specification of the audio device 2 and transmits the audio output specification information to the television receiver 1 and the recorder 5 via the DDC lines of the HDMI cables 6 and 9. Although not shown, since the HDMI terminal has a hot plug detection terminal, when the HDMI terminal is connected, the video display specification and audio output specification information are received on the TV using the hot plug detection function. Is transmitted to the machine 1 or the recorder 5.

  The HDMI receiving LSI 159 separates and reproduces the video signal and audio signal from the recorder 5 received via the HDMI cable, outputs the video signal to the HDMI transmitting LSI 160, and outputs the audio signal to the HDMI transmitting LSI 160 and the selector 142. To do.

  The HDMI transmission LSI 160 outputs the video signal and audio signal input from the HDMI reception LSI 159 to the HDMI reception LSI 110 of the television receiver 1 via the TMDS channel 167 of the HDMI cable 6. The signal output from the HDMI transmission LSI 160 to the HDMI reception LSI 110 is transmitted as a signal based on the HDMI standard (video, audio, clock signal called TMDS link) as shown in FIG.

  The selector 142 selects either an audio signal from the digital audio interface demodulator 141 or an audio signal from the HDMI receiving LSI 159 according to an instruction from the system controller 156 and outputs the selected audio signal to the audio composite unit 143.

  The recorder 5 also includes a system controller 172 and an HDMI transmission LSI 171. The HDMI transmission LSI 171 transmits the video data stored in the storage means inside the recorder 5 and the video signal and audio data from the HDMI transmission LSI 171 to the HDMI reception LSI 159 of the audio device 2 in accordance with an instruction from the system controller 172.

  Further, the system controller 172 uses a hot plug detection function (not shown) to store video display specifications, audio output specifications stored in the EDIR-ROM of the television receiver 1, or EDIR-ROMs of the audio equipment 2. The voice output specification data can be read through the DDC line 166.

  Further, the system controller 172 can exchange control signals with the system controllers 115 and 156 of the television receiver 1 or the audio equipment 2 through the CEC line 165. Although not shown, in the recorder, a bidirectional buffer is connected to the CEC line, and an EDID-ROM is connected to the DDC line in the same configuration as the bidirectional buffer 133 and the EDID-ROM 134 of the television receiver 1.

  Next, in response to a command from the remote controller 117 operated by the user, the television receiver 1 receives a broadcast program from a broadcasting station, displays an image on the display unit 109 of the television receiver 1, and the speaker 152 of the audio device 2. The flow of the video signal, audio signal, and control signal when audio is output from 155 will be described with reference to FIG. 7 is the same as the configuration shown in FIG.

  As for the audio output specification of the audio device 2, when the television receiver 1 is connected to the audio device 2 via the HDMI cable 6, the audio output specification data of the EDID-ROM 158 is read by the system controller 115 and stored in the memory 118 in advance. It is remembered.

  First, it is assumed that the television receiver 1 is ready to receive a broadcast program from the antenna 104. When the user operates the remote controller 117, the television receiver 1 receives a broadcast program from a broadcasting station, displays the video on the display unit 109 of the television receiver 1, and outputs audio from the speakers 152 to 155 of the audio device 2. When instructed to switch, the system controller 115 that has received an instruction from the remote controller 117 switches the video signal processing unit 108 so as to select the signal of the video decoding unit 107. Further, the selector 112 is switched so as to select the signal from the multiplexing restoration unit 106. Further, the gain of the volume 124 is set to 0 so that the audio output is not output from the speakers 129 to 132. At this time, the audio control unit 121 may stop operating.

  In addition, the system controller 115 instructs the system controller 156 to output sound from the speakers 152 to 155 of the audio device 2 through the CEC line. Upon receiving this command, the system controller 156 switches the selector 142 to select the signal of the digital audio interface demodulator 141, and changes the genre and the number of input channels of the broadcast program sent from the system controller 115 through the CEC line 169. Accordingly, the processing configuration of the audio control unit 144 is switched so that the optimum sound field mode is obtained.

  Therefore, the video signal decoded by the video decoding unit 107 is selected by the video signal processing unit 108 and sent to the display unit 109, whereby the display unit 109 displays the video of the broadcast program. This video signal is indicated by a signal flow indicated by a solid line (A) in FIG.

  The genre extracted by the content information restoration unit 111 is output to the system controller 115. The content information restoration unit 111 decodes the additional information input from the multiplexing restoration unit 106, extracts a genre from the decoded additional information, and outputs the genre to the system controller 115. The audio signal from the multiplexing restoration unit 106 is selected by the selector 112 and output to the audio decoding unit 120 and the digital audio interface modulation unit 113.

  Then, the number of input channels of the audio signal is decoded by the audio decoding unit 120. The system controller 115 reads the genre of the broadcast program from the content information restoration unit 111 and reads the number of channels from the audio decoding unit 120. The system controller 115 sends a signal corresponding to the genre of the read broadcast program and the number of input channels to the system controller 156 of the audio device 2. This command is indicated by a signal flow indicated by a one-dot chain line (b) in FIG.

  The system controller 156 that has received a signal corresponding to the broadcast program genre and the number of input channels allows the audio control unit 144 to perform an audio field mode that is optimal for the broadcast program genre and the number of input channels. The number of output channels and the sound field mode of the device 2 are changed.

  Since the audio signal output from the selector 112 is also output to the digital audio interface modulation unit 113, the audio signal is output from the digital audio interface modulation unit 113, the light emitting element 114, the optical cable 18, the light receiving element 140, and the digital audio interface demodulation. Is transmitted to the unit 141. The selector 142 selects the signal from the digital audio interface demodulator 141 and sends it to the audio demodulator 143.

  Since the audio control unit 144 has already been switched to a processing configuration that realizes a sound field mode that is optimal for the genre of broadcast program and the number of input channels, the speakers 152-2 are based on the audio signal processed by the audio control unit 144. 155. This audio signal is indicated by a signal flow indicated by a dotted line (c) in FIG. The sound output from the speakers 152 to 155 realizes an optimum sound field mode corresponding to the genre of the broadcast program and the number of input channels.

  Next, in accordance with a command from the remote controller 117 operated by the user, video is displayed on the television receiver 1 based on the video signal of the recorded program of the recorder 5, and on the audio device 2 based on the audio signal of the recorded program of the recorder 5. The flow of the video signal, the audio signal, and the control signal when outputting audio will be described with reference to FIG. 8 is the same as the configuration shown in FIG.

  As for the audio output specification of the audio device 2, when the recorder 5 is connected to the audio device 2 via the HDMI cable 9, the audio output specification data of the EDID-ROM 158 is read by the system controller 172 and stored in the system controller 172 in advance. Stored in the means.

  First, it is assumed that the recorder 5 is recording a broadcast program. At this time, the genre information of the broadcast program is also recorded as the recording information. The user operates the remote controller 117 to instruct the system controller 115 to display video on the television receiver 1 based on the video signal of the recorder 5 and to switch to output audio on the audio device 2 based on the audio signal of the recorder 5. Then, the system controller 115 that has received a command from the remote controller 117 switches the video signal processing unit 108 so as to select the video signal of the HDMI receiver 110. Further, the gain of the volume 124 is set to 0 so that the audio output is not output from the speakers 129 to 132.

  At this time, the broadcast receiving unit (the tuner 105, the multiplexing restoration unit 106, the video decoding unit 107, the content information restoration unit 111) and the audio processing unit (the audio decoding unit 120, the audio control unit 121) of the television receiver 1 are used. The digital audio interface modulation unit 113 and the light emitting element 114) are preferably stopped operating.

  Further, the system controller 115 instructs the system controller 156 to reproduce the audio signal from the recorder 5 through the speakers 152 to 155 of the audio device 2 through the CEC line 169 of the HDMI cable 6. Receiving this command, the system controller 156 switches the selector 142 so as to select the audio signal of the HDMI receiver 159. In addition, the processing configuration of the audio control unit 144 is switched so as to be in the optimum sound field mode according to the genre of the broadcast program transmitted from the recorder 5 through the CEC line 165 of the HDMI cable 9 and the number of input channels.

  Therefore, the video signal processing unit 108 selects the video signal transmitted via the HDMI transmission LSI 171 of the recorder 5, the HDMI reception LSI 159 of the audio device 2, the HDMI transmission LSI 160, and the HDMI reception LSI 110 of the television receiver 1. The display unit 109 displays the video of the broadcast program. The flow of this video signal is indicated by a solid line (d) in FIG.

  Further, the information on the genre and the number of channels extracted by the system controller 172 is output to the system controller 156 of the audio device 2. The flow of this control signal is indicated by a dashed line (e) in FIG. The system controller 156 that has received a signal corresponding to the genre of the broadcast program and the number of input channels performs processing for changing the number of output channels and the sound field mode of the audio device 2, so that the optimum sound for the genre of the recorded program and the number of input channels is obtained. The processing configuration is switched to realize the field mode.

  The audio signal input to the selector 142 via the HDMI transmission LSI 171 of the recorder 5 and the HDMI reception LSI 159 of the audio device 2 is selected by the selector 142 and sent to the audio demodulation unit 143. Since the audio control unit 144 has already been switched to a processing configuration that realizes a sound field mode that is optimal for the genre of broadcast program and the number of input channels, the speakers 152-2 are based on the audio signal processed by the audio control unit 144. 155. The flow of this audio signal is indicated by a dotted line (f) in FIG. The sound output from the speakers 152 to 155 realizes an optimum sound field mode corresponding to the genre of the recorded program and the number of input channels.

  Next, the audio reproduction process according to the comparison result by the audio data comparison unit 120a described above will be described with reference to FIGS. The audio reproduction process described below is performed by either the left and right front speakers 129 and 130 on the television receiver 1 side or the left and right front speakers 152 and 153 on the audio device 2 side. Since both processes are substantially the same, the processes by the left and right front speakers 129 and 130 on the television receiver 1 side are represented.

  First, based on the EPG restored by the multiplexing restoration unit 106 by the audio data comparison unit 120a or the audio channel number information obtained from the header information of the audio data, the channel number information is 2ch (stereo). ), Comparison is made as to whether the sound data of Lch and Rch are different or the same.

  Here, if the sound data of Lch and Rch are different, the audio channel number information obtained from the restored EPG or the header information of the audio data and the sound data are compatible. A comparison result indicating that the audio control unit 121 is adapted is output. In this case, Lch and Rch audio signals are reproduced from the left and right front speakers 129 and 130 on the television receiver 1 side.

  In this case, for example, when a matrix decoding process for converting the 2ch audio signal by the channel number conversion processing unit 191 to 3.1ch or 5.1ch is instructed, a sound field process corresponding to the matrix decoding process is also performed. Done.

  On the other hand, if the sound data of Lch and Rch is the same, the audio channel number information obtained from the restored EPG or audio data header information and the sound data are not compatible. A comparison result indicating that the audio control unit 121 is not adapted is output. In this case, the above-described channel number conversion processing unit 191 converts a 2ch audio signal into a 1ch audio signal.

  In this case, for example, when the matrix decoding process for converting the 2ch audio signal by the channel number conversion processing unit 191 to 3.1ch or 5.1ch is instructed, the sound field process or the like corresponding to the matrix decoding process is performed. Not done.

  In this case, either the Lch sound or the Rch sound is selected. For example, when the Rch sound is selected, as shown in FIG. 9, if the Rch sound component is Xb, The Rch sound component Xb is reproduced from the left and right front speakers 129 and 130 on the television receiver 1 side.

  On the other hand, when an Lch sound is selected, if the Lch sound component is Xa as shown in FIG. 10, the Lch sound is transmitted from the left and right front speakers 129 and 130 on the television receiver 1 side. Component Xa will be regenerated.

  As described above, if the audio audio channel number information obtained from the restored EPG or audio data header information and the audio data do not match, monaural reproduction using either the Lch or Rch sound is possible. For example, when a matrix decoding process for converting a 2ch audio signal to 3.1ch or 5.1ch by the above-described channel number conversion processing unit 181 is instructed, a response to the matrix decoding process is given. Sound field processing or the like can be prevented from being performed.

  Next, another sound reproduction process according to the comparison result by the sound data comparison unit 120a described above will be described with reference to FIGS. 11 and 12 show a case where the audio reproduction process is performed by the left and right front speakers 129 and 130 and the center speaker 131 described above.

  First, similarly to the above, based on the EPG restored by the multiplexing restoration unit 106 by the audio data comparison unit 120a described above or the channel number information of the audio of the video obtained from the header information of the audio data, the channel number information Is 2ch (stereo), a comparison is made as to whether the sound data of Lch and Rch are different or the same.

  Here, when the sound data of Lch and Rch are different, the audio channel number information obtained from the restored EPG or the header information of the audio data and the sound data are compatible. A comparison result indicating that the audio control unit 121 is adapted is output. In this case, Lch and Rch audio signals are reproduced from the left and right front speakers 129 and 130 and the center speaker 131 on the television receiver 1 side.

  On the other hand, if the sound data of Lch and Rch is the same, the audio channel number information obtained from the restored EPG or audio data header information and the sound data are not compatible. A comparison result indicating that the audio control unit 121 is not adapted is output. In this case, the above-described channel number conversion processing unit 191 converts a 2ch audio signal into a 1ch audio signal.

  In this case, either the Lch sound or the Rch sound is selected. For example, when the Rch sound is selected, as shown in FIG. The Rch sound component Xb is reproduced from the left and right front speakers 129 and 130 and the center speaker 131 on the receiver 1 side.

  On the other hand, when the Lch sound is selected, as shown in FIG. 12, if the Lch sound component is Xa, the left and right front speakers 129 and 130 and the center speaker 131 on the TV receiver 1 side The component Xa of the Lch sound is reproduced.

  In this case, similarly to the above, for example, when the matrix decoding process for converting the 2ch audio signal by the above-described channel number conversion processing unit 191 to 3.1ch or 5.1ch is instructed, the sound corresponding to the matrix decoding process is selected. It is possible to prevent the field processing from being performed, and the center channel 131 reproduces the Rch sound component Xb or the Lch sound component Xa, thereby making the sound image position clearer and the sound in monaural reproduction. Becomes easier to listen to.

  As described above, in the present embodiment, on the television receiver 1 side, the multiplexed signal of the selected digital broadcast is restored by the multiplexing restoration unit 106 as the multiplexing restoration means, and the video signal, the audio signal, the electronic signal is restored. Separated into additional information having program guide information, an audio signal is decoded by an audio decoding unit 120 as audio decoding means, and electronic program guide information or audio is output by an audio data comparison unit 120a as first audio data comparison means. When the audio audio channel number information obtained from the signal header information is 2 ch, the left and right sound data decoded by the audio decoding unit 120 are compared, and when the left and right sound data are the same, For example, monaural reproduction from the left and right front speakers 129 and 130 is performed by the audio control unit 121 as one audio control means. It was.

  On the audio equipment 2 side, the audio signal is demodulated by the audio demodulator 143 as the audio demodulator, and from the electronic program guide information or the header information of the audio signal by the audio data comparator 143a as the second audio data comparator. When the audio channel number information of the obtained video is 2 ch, the left and right sound data demodulated by the audio demodulation unit 143 is compared, and when the left and right sound data are the same, the second audio control means The audio control unit 144 performs monaural reproduction by the front speakers 152 and 153 as the left and right external speakers.

  In this way, by comparing whether the left and right sound data are the same by the comparison by the sound data comparison unit 120a or 143a, the sound data is the same sound for the Lch and Rch while the number of channels information is stereo. Even if a broadcast is present, the presence of the broadcast can be confirmed, and sound field processing suitable for monaural reproduction can be performed.

  In this case, the comparison by the audio data comparison unit 120a or 143a indicates that when the channel number information is stereo and the sound data is the same sound for the Lch and Rch, the OSD indicates that the display unit 109 is monaural audio. You may make it display. Such OSD display not only makes the viewer aware that the audio of the video currently being viewed is monaural, but also gives anxiety that the audio processing circuit has failed. Disappear.

  Also, in monaural reproduction, either one of the left and right sound data may be used, so half the processing can be performed compared to Lch and Rch data processing in normal stereo reproduction. .

  In the present embodiment, for example, the audio reproduction processing in the system in which the audio device 2 is connected to the television receiver 1 via, for example, the HDMI cable 6 is described. However, the present invention is not limited to this example. It is also possible to perform the audio reproduction process.

  The present invention can be applied not only to a television receiver but also to other monitor devices that display video.

It is a figure for demonstrating one Example of the audiovisual reproduction system of this invention. It is a figure for demonstrating the other example of the audiovisual reproduction system of this invention. It is a figure for demonstrating the other example of the audiovisual reproduction system of this invention. It is a figure for demonstrating the detailed connection relation of the HDMI cable part in FIGS. 1-3. FIG. 4 is a schematic control block diagram corresponding to the configuration of FIG. 3. FIG. 4 is a diagram showing the control configuration of the television receiver, audio device, and recorder in more detail in the configuration of FIG. 3. It is a figure for demonstrating the flow of a video signal, an audio | voice signal, and a control signal in the structure of FIG. It is a figure for demonstrating the flow of a video signal, an audio | voice signal, and a control signal in the structure of FIG. It is a figure for demonstrating the audio | voice reproduction | regeneration processing according to the comparison result by the audio | voice data comparison part of FIG. It is a figure for demonstrating the audio | voice reproduction | regeneration processing according to the comparison result by the audio | voice data comparison part of FIG. It is a figure for demonstrating the other audio | voice reproduction | regeneration processing according to the comparison result by the audio | voice data comparison part of FIG. It is a figure for demonstrating the other audio | voice reproduction | regeneration processing according to the comparison result by the audio | voice data comparison part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Television receiver 2 Audio equipment 3-5 Recorder 6-9, 25 HDMI cable 18 Optical cable 21 HDMI source 22 HDMI sink 23 HDMI transmitter 24 HDMI receiver 28 TMDS channel 29,165,169 CEC line 30,166,170 DDC Line 31,134,158 EDID-ROM
41-43 Host CPU
44 Monitor microcomputer 45, 46 Front microcomputer 47-49, 54, 55 Interface circuit 50, 51, 110, 159 HDMI reception LSI
52, 53, 160, 171 HDMI transmission LSI
104 Antenna 105 Tuner 106 Multiplexing Restoration Unit 107 Video Decoding Unit 108 Video Signal Processing Unit 112, 142 Selector 109 Display Unit 111 Content Information Restoration Unit 113 Digital Audio Interface Modulation Unit 114 Light Emitting Element 115, 156, 172 System Controller 116 Remote Control Light Receiving Unit 117 Remote control 118 Memory 119 Operation unit 120 Voice decoding unit (voice decoding means)
120a Audio data comparison unit (audio data comparison means, first audio data comparison means)
143a Audio data comparison unit (second audio data comparison means)
121 Audio control unit (audio control means, first audio control means)
144 Audio control unit (second audio control means)
124,147 Volume 125-128, 148-151 Amplifier 129, 130 Front speaker (speaker)
152,153 Front speakers (external speakers)
131,154 Center speaker 132,155 Subwoofer 133,157 Bidirectional interface circuit 140 Light receiving element 141 Digital audio interface demodulator 143 Audio demodulator (audio demodulator)
161, 167 TMDS channels 181 Channel number conversion processing unit 182 Sound field change processing unit 183 Enhancement processing unit 184 Equalizer processing unit 191 Channel number conversion processing unit 192 Sound field change processing unit 193 Enhancement processing unit 194 Equalizer processing unit

Claims (9)

A video / audio reproduction device in a television receiver having at least left and right speakers,
Multiplex restoration means for restoring the multiplexed signal of the selected digital broadcast and separating it into each of the additional information having the video signal, the audio signal, and the electronic program guide information,
Audio decoding means for decoding the audio signal;
Audio data comparison means for comparing left and right sound data decoded by the audio decoding means when the audio channel number information obtained from the electronic program guide information or the header information of the audio signal is 2 ch; ,
Audio control means for performing stereo reproduction or monaural reproduction from the left and right speakers according to the comparison result by the audio data comparison means,
The audio / video reproduction device according to claim 1, wherein when the left and right sound data are the same in the comparison by the audio data comparison means, the audio control means performs monaural reproduction by the left and right speakers. A video / audio reproduction device in a television receiver having at least left and right speakers and a center speaker,
Multiplex restoration means for restoring the multiplexed signal of the selected digital broadcast and separating it into each of the additional information having the video signal, the audio signal, and the electronic program guide information,
Audio decoding means for decoding the audio signal;
Audio data comparison means for comparing left and right sound data decoded by the audio decoding means when the audio channel number information obtained from the electronic program guide information or the header information of the audio signal is 2 ch; ,
Audio control means for performing stereo reproduction or monaural reproduction from the left and right speakers and the center speaker according to the comparison result by the audio data comparison means,
The audio / video reproduction apparatus according to claim 1, wherein when the left and right sound data are the same in the comparison by the audio data comparison means, the audio control means performs monaural reproduction by the left and right speakers and a center speaker. A video / audio reproduction system in a television receiver having at least left and right speakers and an audio device connected to the television receiver and having at least left and right external speakers,
The television receiver
Multiplex restoration means for restoring the multiplexed signal of the selected digital broadcast and separating it into each of the additional information having the video signal, the audio signal, and the electronic program guide information,
Audio decoding means for decoding the audio signal;
First audio data comparison for comparing left and right sound data decoded by the audio decoding means when the number of audio channel information obtained from the electronic program guide information or the header information of the audio signal is 2 ch Means,
First audio control means for performing stereo reproduction or monaural reproduction from the left and right speakers according to the comparison result by the first audio data comparison means,
The audio device is
Connected to the television receiver via an HDMI cable that receives at least an audio signal from the television receiver;
Audio demodulation means for demodulating the audio signal;
Second audio data comparison means for comparing left and right sound data demodulated by the audio demodulation means when the audio channel number information obtained from the electronic program guide information or the header information of the audio signal is 2 ch. When,
Second audio control means for performing stereo reproduction or monaural reproduction from the left and right external speakers according to the comparison result by the second audio data comparison means,
When the left and right sound data are the same in the comparison by the first sound data comparison means or the second sound data comparison means in response to a sound reproduction instruction, the first audio control means or the second audio control means Monaural reproduction is performed by left and right speakers or the left and right external speakers. A video / audio reproduction system in a television receiver having at least left and right speakers and a center speaker, and an audio device connected to the television receiver and having at least left and right external speakers and an external center speaker,
The television receiver
Multiplex restoration means for restoring the multiplexed signal of the selected digital broadcast and separating it into each of the additional information having the video signal, the audio signal, and the electronic program guide information,
Audio decoding means for decoding the audio signal;
First audio data comparison for comparing left and right sound data decoded by the audio decoding means when the number of audio channel information obtained from the electronic program guide information or the header information of the audio signal is 2 ch Means,
First audio control means for performing stereo reproduction or monaural reproduction from the left and right speakers and the center speaker in accordance with a comparison result by the first audio data comparison means;
The audio device is
Connected to the television receiver via an HDMI cable that receives at least an audio signal from the television receiver;
Audio demodulation means for demodulating the audio signal;
Second audio data comparison means for comparing left and right sound data demodulated by the audio demodulation means when the audio channel number information obtained from the electronic program guide information or the header information of the audio signal is 2 ch. When,
Second audio control means for performing stereo reproduction or monaural reproduction from the left and right external speakers and the external center speaker in accordance with a comparison result by the second audio data comparison means;
When the left and right sound data are the same in the comparison by the first sound data comparison means or the second sound data comparison means in response to a sound reproduction instruction, the first audio control means or the second audio control means Monaural playback is performed by the left and right speakers and the center speaker or the left and right external speakers and the external center speaker. The audio device is connected to the television receiver via an optical cable;
The audio / video reproduction system according to claim 3 or 4, wherein an audio signal from the television receiver is transmitted to the audio device via the HDMI cable and / or the optical cable. A video / audio reproduction method in a television receiver having at least left and right speakers,
A step of restoring the multiplexed signal of the selected digital broadcast by the multiplexing restoration means, and separating the multiplexed signal into video signal, audio signal, and additional information having electronic program guide information;
Decoding the audio signal by audio decoding means;
When audio channel number information of the video obtained from the electronic program guide information or the header information of the audio signal is 2ch by the audio data comparison unit, the left and right sound data decoded by the audio decoding unit are compared. And a process of
A step of causing the audio control means to perform stereo reproduction or monaural reproduction from the left and right speakers according to the comparison result by the audio data comparison means,
The audio / video reproduction method, wherein when the left and right sound data are the same in the comparison by the audio data comparison means, the audio control means performs monaural reproduction by the left and right speakers. A video / audio reproduction method in a television receiver having at least left and right speakers and a center speaker,
A step of restoring the multiplexed signal of the selected digital broadcast by the multiplexing restoration means, and separating the multiplexed signal into video signal, audio signal, and additional information having electronic program guide information;
Decoding the audio signal by audio decoding means;
When audio channel number information of the video obtained from the electronic program guide information or the header information of the audio signal is 2ch by the audio data comparison unit, the left and right sound data decoded by the audio decoding unit are compared. And a process of
A step of causing the audio control means to perform stereo reproduction or monaural reproduction from the left and right speakers and the center speaker according to the comparison result by the audio data comparison means;
The audio / video reproduction method, wherein when the left and right sound data are the same in the comparison by the audio data comparison means, the audio control means performs monaural reproduction by the left and right speakers and the center speaker. A video / audio reproduction method in a television receiver having at least left and right speakers and an audio device connected to the television receiver and having at least left and right external speakers,
The television receiver
A step of restoring the multiplexed signal of the selected digital broadcast by the multiplexing restoration means, and separating the multiplexed signal into video signal, audio signal, and additional information having electronic program guide information;
Decoding the audio signal by audio decoding means;
When the audio audio channel number information obtained from the electronic program guide information or the header information of the audio signal is 2ch by the first audio data comparison means, the left and right sound data decoded by the audio decoding means A step of comparing
A step of causing the first audio control means to perform stereo reproduction or monaural reproduction from the left and right speakers according to the comparison result by the first audio data comparison means,
The audio device is
Connected to the television receiver via an HDMI cable that receives at least an audio signal from the television receiver;
Demodulating the audio signal by audio demodulation means;
When the second audio data comparison means has 2ch audio channel number information obtained from the electronic program guide information or the header information of the audio signal, the left and right sound data demodulated by the audio demodulation means is obtained. A step of comparing;
A step of causing the second audio control means to perform stereo reproduction or monaural reproduction from the left and right external speakers according to the comparison result by the second audio data comparison means,
When the left and right sound data are the same in the comparison by the first sound data comparison means or the second sound data comparison means in response to a sound reproduction instruction, the first audio control means or the second audio control means Monaural reproduction is performed by the left and right speakers or the left and right external speakers. A video / audio reproduction method in a television receiver having at least left and right speakers and a center speaker, and an audio device connected to the television receiver and having at least left and right external speakers and an external center speaker,
The television receiver
A step of restoring the multiplexed signal of the selected digital broadcast by the multiplexing restoration means, and separating the multiplexed signal into video signal, audio signal, and additional information having electronic program guide information;
Decoding the audio signal by audio decoding means;
When the audio audio channel number information obtained from the electronic program guide information or the header information of the audio signal is 2ch by the first audio data comparison means, the left and right sound data decoded by the audio decoding means A step of comparing
A step of causing the first audio control means to perform stereo reproduction or monaural reproduction from the left and right speakers and the center speaker according to a comparison result by the first audio data comparison means,
The audio device is
Connected to the television receiver via an HDMI cable that receives at least an audio signal from the television receiver;
Demodulating the audio signal by audio demodulation means;
When the second audio data comparison means has 2ch audio channel number information obtained from the electronic program guide information or the header information of the audio signal, the left and right sound data demodulated by the audio demodulation means is obtained. A step of comparing;
A step of causing the second audio control means to perform stereo reproduction or monaural reproduction from the left and right external speakers and the external center speaker according to a comparison result by the second audio data comparison means,
When the left and right sound data are the same in the comparison by the first sound data comparison means or the second sound data comparison means in response to a sound reproduction instruction, the first audio control means or the second audio control means Monaural reproduction is performed by the left and right speakers and the center speaker or the left and right external speakers and the external center speaker.

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