JP5590186B2 - AV system - Google Patents

Description

  The present invention relates to an AV system that reproduces content using a plurality of AV devices.

  In the conventional television apparatus, the video signal has a larger amount of data and the signal processing is more complicated than the audio signal. Therefore, if audio or video is output as it is immediately after processing, the audio is output first, and the audio and video are shifted. Therefore, in the conventional television apparatus, the movement of the lips (video to be displayed on the monitor) and the voice (sound emitted from the built-in speaker or the built-in audio output terminal) are synchronized, that is, lip-synced so that the sound is synchronized. The sound emission timing was delayed.

  Also, in a conventional AV system, when a DVD player plays back content, the television receiver processes the video signal and displays it on the built-in monitor, and the AV amplifier processes the audio signal and emits sound from an external speaker. There was a thing (refer patent document 1). This AV system is designed on the assumption that a video signal has a larger amount of data and is more complicated to process than an audio signal. In this AV system, in order to prevent the occurrence of lip sync deviation, the AV amplifier acquires the processing time information of the video signal from the television receiver, and performs the delay processing of the audio signal according to the processing time information. It was.

JP 2006-33436 A

  However, in the conventional AV system, the sound emission timing may be later than the video display timing. For example, when an AV amplifier is connected to a conventional television apparatus, the video of the broadcast program received by the television apparatus is displayed on a monitor, and the sound of the broadcast program is emitted from a speaker connected to the AV amplifier. In this case, since the television apparatus outputs an audio signal from the built-in audio output terminal so as to lip-sync with the video to be displayed on the monitor, if signal processing such as addition of an acoustic effect is performed by the AV amplifier, the signal processing There is a problem that the sound emission timing is delayed by the amount of time and the lip sync shift occurs.

  Further, recently, television devices have been provided with a game mode for improving the timing of pressing a button on a game machine and the difference between images. The game mode simplifies video processing as much as possible to speed up video display timing. When this game mode is selected, if the AV amplifier is set to add sound effects to the audio, the audio playback will be delayed compared to the content video, resulting in a lip sync shift. There was a problem.

  Also, when content is broadcasted from a source device such as a DVD device to a subwoofer and an AV amplifier to which a speaker is connected, the audio playback processing time differs between the AV amplifier and the subwoofer, and the audio playback timing is different. There was a problem of being different. In particular, in an AV amplifier, when a sound effect (an echo sound) that reproduces the sound of a concert hall or the like is added to the sound, the difference in the sound reproduction processing time becomes larger. For this reason, the sound (low sound) emitted by the subwoofer has propagated to the listening position earlier than the sound emitted by the speaker connected to the AV amplifier.

  As described above, in the conventional AV system, there is a problem that a reproduction timing shift occurs between AV apparatuses that reproduce contents.

  Accordingly, an object of the present invention is to provide an AV system capable of correcting so as to eliminate a deviation in reproduction timing between AV apparatuses that reproduce contents.

  The present invention has the following configuration as means for solving the above problems.

  The AV system of the present invention includes a source device that broadcasts content to an AV device. Also, each AV device receives the content broadcast by the source device and performs playback processing. The communication means communicates reproduction processing time information, which is information related to the content reproduction processing, with other AV devices, and the delay means matches the content of the AV device with the latest reproduction timing based on the reproduction processing time information. Delays playback.

  In this configuration, when content is broadcast from a source device to a plurality of AV devices, information related to content reproduction processing is communicated between the AV devices. Each AV device delays the reproduction of the content in accordance with the AV device having the latest reproduction timing. Accordingly, when the same content is played back by a plurality of AV devices, the content can be played back without causing a shift between the AV devices.

  In the AV system of the present invention, the communication means transmits information for delaying the reproduction of the content to the AV device having a short time required for the reproduction process based on the reproduction processing time information. An AV device that has a short time required for playback processing only needs to have a configuration that receives information that delays playback of content from another AV device and delays playback of the content. Since the reproduction timing does not need to be adjusted, the configuration can be simplified.

  In the AV system according to the present invention, the AV apparatus distributes audio signals to a plurality of speakers in the speaker array and adjusts the sound emission timing for each audio channel to form an audio beam. Beam control means for causing a plurality of sounds to simultaneously reach the viewing position. Further, the time required for the sound processing includes time for the sound to reach the viewing position.

  In the speaker array device, since the sound beam is reflected on the wall a plurality of times and propagated to the viewing position, the propagation time from when the sound beam is emitted until it is propagated to the viewing position is longer than that of other general speakers. . In this configuration, when a speaker array device is used as an audio playback device, the playback of the video is delayed in consideration of the propagation time of the audio beam, so that the video played back by the video playback device and the audio playback device play back. Therefore, it is possible to reliably synchronize the sound to be played and to prevent the occurrence of lip sync deviation.

  In the AV system according to the present invention, the delay means changes a delay amount when the content is reproduced depending on whether the content is received directly from the source device or via another AV device. To do.

  When the AV apparatus receives content through any of a plurality of routes, it is conceivable that the reception timing differs depending on the route. In this configuration, the content reproduction is delayed according to the content reception path, so that the video reproduced by the video reproduction device and the audio reproduced by the audio reproduction device, regardless of the content received through any route, It can be reliably synchronized.

  The AV system of the present invention reproduces content video, transmits a content audio signal delayed by the delay means in accordance with the video reproduction timing, and receives the content audio signal from the video reproduction device. And a sound reproducing device for reproducing sound. The video playback device delays and outputs the audio signal of the content in accordance with the video playback timing because the time required for video processing is longer than the time required for audio processing. Since the audio reproduction device processes the audio signal output from the video reproduction device, the reproduction of the audio is delayed by the audio processing time necessary for the processing. Therefore, the audio reproducing device transmits information on the audio processing time necessary for processing the audio signal of the content to the video reproducing device by the second communication means. The video reproduction device reduces the delay time of the audio signal based on the information related to the audio reproduction processing received from the audio reproduction device. By performing such processing, the video reproduced by the video reproduction device and the audio reproduced by the audio reproduction device can be reproduced in synchronization, and lip sync can be realized.

  In the AV system according to the present invention, when the time required for the audio playback process is longer than the time required for the video playback process, the video playback timing is delayed by the difference between the sum of the audio processing times and the video processing time. Let

  When a sound effect is added to an audio signal or when video playback processing is fast as in the game mode, the timing at which the audio playback device plays back the audio is later than the timing at which the video playback device plays back the video. Sometimes. In this configuration, in such a case, the delay means of the video playback device delays the video playback timing by the difference between the sum of the audio processing times and the video processing time. The video reproduced by the reproduction device and the audio reproduced by the audio reproduction device can be reproduced in synchronization, and lip synchronization can be realized.

  In the AV system according to the present invention, the sound reproducing device distributes the sound signal to the plurality of speakers of the speaker array and adjusts the sound emission timing for each sound channel to form a sound beam. And a beam control means for simultaneously allowing the plurality of voices to reach the viewing position at the same time. Further, the time required for the sound processing includes time for the sound to reach the viewing position.

  In the speaker array device, since the sound beam is reflected on the wall a plurality of times and propagated to the viewing position, the propagation time from when the sound beam is emitted until it is propagated to the viewing position is longer than that of other general speakers. . In this configuration, when a speaker array device is used as an audio playback device, the playback of the video is delayed in consideration of the propagation time of the audio beam, so that the video played back by the video playback device and the audio playback device play back. It is possible to reliably synchronize the sound to be played.

  In the AV system of the present invention, when the speaker array device used as the sound reproducing device has a plurality of beam modes for changing the position where the sound beam is reflected on the wall, the beam mode selected in the speaker array device is set. Accordingly, the time required for the voice processing is changed.

  When the speaker array device has a plurality of beam modes that change the position where the sound beam is reflected on the wall according to the installation location, the sound beam is emitted according to the beam mode and then propagated to the viewing position. Propagation time is different. In this configuration, the video processing time is delayed in consideration of the fact that the propagation time varies depending on the beam mode, so that video and audio can be synchronized regardless of which beam mode is selected.

  In the AV system of the present invention, each AV device transmits / receives information related to the playback timing of the content, and delays playback of the content in accordance with the AV device with the latest playback timing based on information communicated with other AV devices. Therefore, the content reproduction can be synchronized. Therefore, the content can be played back without causing a lip sync shift or a shift between surround sound and bass playback.

1 is a block diagram showing a schematic configuration of an AV system according to a first embodiment of the present invention. It is a figure which shows the state of the audio | voice beam which a speaker array apparatus outputs, the process of each channel of an audio | voice beam, and propagation time. 3 is a timing chart of video processing and audio processing in the AV system according to the first embodiment of the present invention. It is a flowchart for demonstrating the processing operation of AV system. It is a block diagram which shows schematic structure of the AV system which concerns on 2nd Embodiment of this invention. It is a block diagram which shows schematic structure of the AV system which concerns on 3rd Embodiment of this invention. 3 is a timing chart of video processing and audio processing in the AV system. It is a table for managing the processing time of video signals and audio signals according to video resolution, sound field processing mode, and the like. It is a figure which shows the schematic structure of the conventional AV system, and the relationship of processing time. It is a block diagram which shows schematic structure of the AV system which concerns on 4th Embodiment of this invention. It is a figure which shows the relationship of the processing time in the AV system which concerns on 4th Embodiment of this invention. It is a conceptual diagram which shows another structure of this invention. It is a conceptual diagram which shows another structure of this invention.

[First Embodiment]
FIG. 1 is a block diagram showing a schematic configuration of an AV system according to the first embodiment of the present invention. FIG. 2 is a diagram showing the state of the sound beam output from the speaker array device, and the processing and propagation time of each channel of the sound beam.

  The AV system 1 according to the first embodiment is a 5ch surround system including two AV devices, a speaker array device 13 having functions of an AV amplifier and a speaker, and a television device 11. In the AV system 1, the television device 11 receives the broadcast, the video is displayed on the monitor 31, and the sound is emitted from the speaker array device 13.

  In the following description, in a 5ch surround system, the front left channel is L (Left) ch, the front right channel is R (Right) ch, the center (center) channel is C (Center) ch, and the rear left channel Is called SL (Surround Left) ch, and the rear right channel is called SR (Surround Right) ch.

  The television device 11 corresponds to a video reproduction device, and includes a reception unit 21, a decoder 23, a signal input unit 25, a video processing unit 27, a video delay unit 29, a monitor (display unit) 31, an audio signal processing unit 32, and an audio delay unit. 33, a D / A converter 34, a power amplifier 35, a speaker 36, an audio output unit 37, a communication unit 39, a storage unit 41, an operation unit 43, and a control unit 45.

  The receiving unit 21 extracts a broadcast (content) signal of a frequency (physical channel) selected by the user from the radio wave received by the antenna 20 and outputs the signal.

  As the signal processing, the decoder 23 decodes the broadcast signal and extracts a video signal and an audio signal. Then, the video signal is output to the video processing unit 27 and the audio signal is output to the audio processing unit 32.

  The signal input unit 25 is an interface that receives an input of a video signal and an audio signal from the outside.

  The video processing unit 27 corresponds to a video processing unit, performs various video signal processing (video playback processing) such as luminance and contrast, and outputs the generated RGB video signal to the video delay unit 29.

  The video delay unit 29 delays the output of the RGB video signal by the time instructed by the control unit 45 and outputs the delayed image signal to the monitor 31.

  The monitor (display unit) 31 corresponds to a display unit, and displays an image based on the RGB video signal supplied from the video delay unit 29.

  The audio signal processing unit 32 corresponds to first audio processing means, and performs audio signal processing (audio reproduction processing) such as decompression processing of a compressed audio signal and addition of an audio effect to the sound emitted from the speaker 36. And output to the audio delay unit 33.

  The audio delay unit 33 corresponds to a delay unit, and delays the output of the audio signal by the time instructed by the control unit 45 and outputs it to the speaker 36 and the audio output unit 37.

  The D / A converter 34 converts the digital audio signal output from the audio delay unit 33 into an analog audio signal and outputs the analog audio signal.

  The power amplifier 35 amplifies and outputs the analog audio signal output from the D / A converter 34.

  The speaker 36 emits sound based on the sound signal supplied from the power amplifier 35.

  The audio output unit 37 is an interface for outputting the audio signal supplied from the audio delay unit 33 to the outside.

  The communication unit 39 corresponds to a first communication unit, and transmits / receives control information (information regarding content reproduction timing) to and from the speaker array device 13.

  The storage unit 41 stores time information and the like necessary for the television device 11 to perform video processing and audio processing.

  The operation unit 43 is a user interface that receives user operations.

  The control unit 45 controls each unit of the television device 11 and performs calculations.

  The speaker array device 13 corresponds to an audio reproduction device, and includes a signal input unit 51, a video signal processing unit 53, a signal output unit 54, a delay processing unit 57, D / A converters 61-1 to 61-N, and a power amplifier 63-. 1 to 63-N, a speaker array 65 including speaker units 65-1 to 65-N, an A / D converter 67, an operation unit 69, a storage unit 71, a communication unit 73, and a control unit 75.

  The signal input unit 51 is an interface that accepts input of audio signals and video signals from the outside. The input signal is output to the video / audio processing unit 53.

  The audio / video processing unit 53 corresponds to a second audio processing unit, and performs a delay process by performing a process of decoding / encoding the audio signal input from the signal input unit 51 or adding an acoustic effect selected by the user. To the unit 57. The video / audio processing unit 53 decodes / encodes the video signal input from the signal input unit 51 and outputs the decoded video signal to the signal output unit 54.

  The signal output unit 54 is an interface that outputs a video signal to an external device.

  The delay processing unit 57 delays the output of the audio signal by the time instructed by the control unit 75 so that the video displayed on the monitor 31 and the audio output from the speaker array 65 are lip-synced.

  The path length until the plurality of audio beams output from the speaker array 65 reach the viewing position L of the user differs for each audio channel. For example, as shown in FIG. 2A, the sound beam of the center channel (Cch) directly reaches (propagates) the viewing position L, so that the path length is the shortest. The sound beam of the front channels (Lch, Rch) reaches the viewing position L after being reflected (wall reflected) once on the wall of the room. The sound beam of the rear channel (SLch, SRch) reaches the viewing position L after being reflected (wall reflected) twice on the wall of the room, and therefore has the longest path length. Therefore, the delay processing unit 57 sets a delay time for each channel, and adjusts the output timing so that a plurality of sound beams output from the speaker array 65 are simultaneously propagated (arrived) to the viewing position. The delay processing unit 57 corresponds to a beam control unit, distributes sound for each channel and each speaker unit so that a plurality of sound beams are output from the speaker array 65, and sets the sound emission timing of each speaker unit. Adjust and output a plurality of audio beams. That is, as shown in FIG. 2B, in the speaker array device 13, the propagation distance of the sound beam becomes longer in the order of Cch (direct sound), front channel (front reflected sound), and rear channel (rear reflected sound). Therefore, the delay processing time is shortened in this order, and the sound beam of each channel reaches the viewing position at the same time.

  Further, in the speaker array device 13, a desired beam mode can be selected from a plurality of beam modes in accordance with the arrangement of the speaker array 65 and the user's selection. For example, as shown in FIG. 2C, when the speaker array 65 is installed at a corner of a room, the speaker array device 13 uses the center channel (Cch) sound beam and the front channel (Lch, Rch) sound. The beam is emitted so as to reach the viewing position L as a direct sound. In addition, the speaker array device 13 emits the sound beam of the rear channel (SLch, SRch) so as to reach the viewing position L after being reflected (wall reflected) once on the wall of the room.

  In the beam mode shown in FIG. 2A and the beam mode shown in FIG. 2C, the number of reflections of the sound beam and the arrangement of the speaker array device 13 are different, and the path length of the sound beam is also different. Although illustration is omitted, in the speaker array device 13, even when another beam mode is selected, the beam mode shown in FIGS. 2A and 2C is different from the beam mode shown in FIG. Different.

  The speaker array device 13 performs the audio beam delay processing as described above. For this reason, when the above speaker array device 13 is connected to the television apparatus 11 that outputs an audio signal from the built-in audio output unit 37 so as to lip-sync with the video displayed on the monitor 31, the audio is reproduced rather than the content video. It will be delayed and the lip sync will shift.

  Therefore, in the present invention, the occurrence of lip sync deviation is prevented by matching the video output timing with the arrival timing of the audio beam.

  In the speaker array device 13, a voice receiving microphone (microphone 66) is installed at the viewing position of the user, the test sound is emitted from the speaker array 65, and the speaker array 65 and the viewing position are detected by a known method. And the optimum reflection position of the sound beam of each channel is determined. Further, the sound beam emission timing of each channel is determined based on the information of the propagation distance of the sound beam of each channel (the time from sound emission until sound collection by the microphone 66 (sound propagation time)).

  As shown in FIG. 1, the D / A converters 61-1 to 61-N convert the digital audio signal output from the delay processing unit 57 into an analog audio signal and output the analog audio signal.

  The power amplifiers 63-1 to 63-N amplify and output the analog audio signals output from the D / A converters 61-1 to 61-N.

  The speaker array 65 corresponds to sound emitting means, and the speaker units 65-1 to 65-N are arranged in a predetermined arrangement such as a matrix, a line, or a honeycomb on one panel. The speaker units 65-1 to 65-N convert the sound signals amplified by the power amplifiers 63-1 to 63-N into sound and emit the sound.

  The A / D converter 67 converts analog audio for testing collected by the microphone 66 into digital audio and outputs the digital audio to the control unit 75.

  The operation unit 69 receives a setting operation or the like for the speaker array device 13 from the user, and outputs a signal corresponding to the operation to the control unit 45.

  The storage unit 71 stores a setting pattern of the speaker unit and the like. The control unit 75 reads data corresponding to the operation received by the operation unit 69. The storage unit 71 also stores time information necessary for audio reproduction processing, that is, time information necessary for audio beam delay processing and information such as time until the sound propagates to the viewing position (information on audio processing time). That is, reproduction processing time information) is stored.

  The communication unit 73 corresponds to the second communication unit, and transmits / receives control information to / from the television apparatus 11.

  The control unit 75 controls each part of the speaker array device 13 and performs calculations.

  The audio output unit 37 of the television device 11 is connected to the signal input unit 51 of the speaker array device 13 by the cable 12. Further, the communication unit 39 of the television device 11 is connected to the communication unit 73 of the speaker array device 13 by the cable 14.

  FIG. 3 is a timing chart of video processing and audio processing in the AV system according to the first embodiment of the present invention. 3A is a timing chart of a conventional AV system, and FIGS. 3B, 3C, 3D, and 3E are timing charts of the present invention.

  As described above, the conventional television apparatus is configured so that the display of the video on the built-in monitor and the output of the audio signal from the built-in speaker or the built-in audio output terminal match (lip-sync). The output of the audio signal was delayed. For this reason, when an acoustic effect is added by an AV amplifier or a speaker array device, as shown in FIG. 3A, sound is emitted more than the display of video for the time required for signal processing for adding the acoustic effect. There was a problem of delay (lip sync misalignment).

  Therefore, in the AV system 1 of the present invention, information (delay amount) of time (audio processing time) required for processing the audio signal by the speaker array device (AV amplifier) 13 and the video signal processing by the television device 11 are necessary. Information (delay amount) in a long time (video processing time) and information (delay amount) in time (audio processing time) necessary for processing an audio signal are notified to the other party (connection device), so that the TV device 11 Adjust the delay time of signals and video signals. Thereby, the video display timing on the monitor 31 of the television device 11 and the timing at which the sound beam output from the speaker array 65 of the speaker array device 13 reaches the viewing position can be matched.

  Note that the speaker array device 13 adjusts the time for the sound to reach the viewing position so that the sound beams of the respective channels simultaneously reach the viewing position as described above. Therefore, in the following description, it is assumed that the sound processing time of the speaker array device 13 includes a time for allowing sound to reach the viewing position (sound propagation time).

  First, the AV system 1 is configured to notify the television apparatus 11 of information related to the processing time (delay amount) of the audio signal necessary for the speaker array apparatus 13 from the speaker array apparatus 13. This information is set as a vendor command so as to be notified from the speaker array apparatus 13 to the television apparatus 11 by, for example, CEC of HDMI (registered trademark). The notification of this information is not limited to HDMI (registered trademark), but a connection line capable of transmitting information from the speaker array device 13 to the television device 11 such as RS-232C can also be used.

The control unit 45 of the television apparatus 11
(Audio signal processing time in the television device 11) + (Audio signal processing time and audio propagation time in the speaker array device 13) <(Video signal processing time in the television device 11)
In this case, as shown in FIG.
(Audio signal processing time in TV apparatus 11) + (Audio signal delay time in TV apparatus 11) + (Audio signal processing time and audio propagation time in speaker array apparatus 13) = (In TV apparatus 11 Video signal processing time)
Thus, the audio signal delay time in the television apparatus 11 is set in the audio delay unit 33. That is, processing for reducing the delay amount of the audio signal (time for delaying the audio signal) on the television device 11 side is performed.

Moreover, the control part 45 of the television apparatus 11 is
(Audio signal processing time in the television device 11) + (Audio signal processing time and audio propagation time in the speaker array device 13)> (Video signal processing time in the television device 11)
In this case, as shown in FIG. 3C, the video playback timing is delayed by the difference between the sum of the audio processing times and the video processing time. That is,
(Audio signal processing time in the television device 11) + (Audio signal processing time and audio propagation time in the speaker array device 13) = (Video signal processing time in the television device 11) + (In the television device 11) Video signal delay time)
Thus, the delay time of the video signal in the television apparatus 11 is set in the video delay unit 29. That is, processing for delaying the video signal is performed on the television device 11 side.

  In general, the audio signal processing time is shorter than the video signal processing time, but the speaker array device performs delay processing so that a plurality of audio beams reach (propagate) simultaneously at the viewing position, 11, when the game mode is selected, the processing time of the audio signal is longer than the processing time of the video signal.

  In this case, the television device 11 and the speaker array device 13 are operated as follows. FIG. 4 is a flowchart for explaining the processing operation of the AV system. Here, it is assumed that the communication unit 39 of the television device 11 and the communication unit 73 of the speaker array device 13 are connected by CEC of HDMI (registered trademark).

  The control unit 45 of the television device 11 confirms whether or not the audio signal processing time information can be notified to the speaker array device 13 via the communication unit 39 (s1).

  The control unit 75 of the speaker array device 13 is on standby until an inquiry is received from the television device 11 (s11: N). When there is an inquiry from the television apparatus 11 (s11: Y), the control unit 75 does not have a notification function of the audio signal processing time information and cannot be notified (s12: N), and notifies that (s13). ). And it waits until an audio | voice signal is input (s16: N).

  The control unit 45 of the television device 11 stands by until a response is received from the speaker array device 13 (s2: N). When there is a response from the speaker array device 13 (s2: Y) and the speaker array device 13 does not have a function of notifying the audio signal processing time information (s3: N), the control unit 45 displays video and audio signals. Are set so that the output timings of the two output signals become the same (s4). And the control part 45 receives the broadcast signal of the channel selected by the user, outputs an audio | voice signal to the speaker array apparatus 13, and displays an image | video on a monitor (s5).

  When the audio signal is input (s16: Y), the controller 75 of the speaker array device 13 emits the audio (s17).

  On the other hand, when the control unit 75 of the speaker array device 13 has a function of notifying the audio signal processing time information and can be notified (s12: Y), the following processing is performed. That is, the control unit 75 reads the currently set audio signal processing time information from the storage unit 71 (s14). Then, the control unit 75 notifies the television apparatus 11 of the fact that the audio signal processing time information can be notified and the audio signal processing time information via the communication unit 73 (s15).

  The control unit 45 of the television apparatus 11 receives a response from the speaker array apparatus 13 (s2: Y), and when the speaker array apparatus 13 has a notification function of audio signal processing time information (s3: Y), Perform the process. That is, based on the audio signal processing time information, the control unit 45 reproduces the processing time information so that the video display timing of the television device 11 and the audio beam output from the speaker array device 13 reach the viewing position at the same time. Is calculated. Then, a delay time is set in the video delay unit 29 or the audio delay unit 33 (s6) (see FIGS. 3B and 3C).

  The control unit 45 of the television device 11 receives the broadcast signal of the channel selected by the user, outputs the audio signal to the speaker array device 13, and displays the video on the monitor (s7).

  When the audio signal is input (s16: Y), the controller 75 of the speaker array device 13 emits the audio (s17).

  In addition, when the control unit 75 of the speaker array device 13 detects that the user has changed the setting of the sound effect, the number of audio beams, or the viewing position by operating the operation unit 69 (s18: Y), The television apparatus 11 is notified of the processing time changed by the operation (s19).

  When detecting the processing time change notification from the speaker array device 13 (s8: Y), the control unit 45 of the television device 11 executes the processing of step s6.

  In addition, when the control unit 75 of the speaker array device 13 detects that the user has operated the operation unit 69 to set power off (end) (s20: Y), the control unit 75 notifies the television device 11 to that effect. (S21), and the process is terminated.

  When the control unit 45 of the television device 11 detects that the end setting has been notified from the speaker array device 13 (s9), the control unit 45 ends the processing.

  Next, the AV system 1 may be configured to notify the speaker array device 13 of difference information between the processing time of the video signal and the processing time of the audio signal necessary for the television device 11. The speaker array device 13 may be configured to read information (EDID) recorded in the storage unit 41 of the television device 11. In this case, the television apparatus 11 outputs the audio signal without delaying the output timing, and the speaker array apparatus 13 is configured to delay the output timing of the audio signal (see FIG. 3D). That is, processing for increasing the delay time of the audio signal on the speaker array device 13 side is performed. Note that transmission / reception of information such as EDID can be set as an HDMI (registered trademark) CEC vendor command. The notification of this information is not limited to HDMI (registered trademark), but a connection line capable of transmitting information from the speaker array device 13 to the television device 11 such as RS-232C can also be used.

  Next, the AV system 1 shown in FIG. 1 is configured to display the video of the broadcast content received by the television apparatus 11 on the monitor 31 and emit the sound of the content from the speaker 36 and the speaker array 65. It is also possible. In this configuration, for example, the viewer A in the living room listens to the sound from the speaker 36 built in the television apparatus 11 while watching the monitor 31, and the viewer B is installed in the living room in the kitchen adjacent to the living room. This is suitable for listening to sound (beam sound) from the speaker array 65.

  In the case of such a configuration, it is necessary to adjust so that the video displayed on the monitor 31 and the sound emitted from the speaker 36 are lip-synced (synchronized). In addition, the viewer B hears not only the sound from the speaker array 65 but also the sound from the speaker 36. Therefore, it is necessary to synchronize the sound emitted from the speaker array 65 and the sound emitted from the speaker 36.

  Therefore, the audio delay unit 33 of the television apparatus 11 delays the audio signal output to the D / A converter 34 and the audio signal output to the audio output unit 37 in order to emit sound from the speaker 36, respectively. And synchronize each audio and video as described above.

  That is, as shown in FIG. 3E, the control unit 45 of the television apparatus 11 causes the sound delay unit 33 to emit sound from the built-in speaker 36 at the same timing as the monitor 31 displays an image. A delay time (amount of delay) A is set to, delay processing is executed, and the audio signal is output to the speaker 36. In addition, the control unit 45 allows the sound from the speaker array 65 and the sound from the speaker 36 to be heard synchronously at the viewing position of the viewer B, that is, the speaker 36 and the speaker array 65 emit sound simultaneously. As described above, the delay time (delay amount) B is set in the audio delay unit 33 to execute the delay process, and the audio signal is output from the audio output unit 37.

  In addition, although each said form demonstrated based on FIG. 3 demonstrated the case where the television apparatus 11 received a broadcast wave and reproduced | regenerated a content, it is not restricted to this, Another structure may be sufficient. . For example, a DVD player or a video playback device may be connected to the signal input unit, and a video signal / audio signal of content played back by these devices may be input from the signal input unit 25.

  As described with reference to FIG. 2, the audio processing time of the speaker array device 13 (the audio signal is processed by the video / audio processing unit 53 and the delay processing unit 57) according to the installation location of the speaker array device 13 and the set beam mode. The processing time and the time until the sound emitted from the speaker array 65 reaches the viewing position are different. For this reason, the speaker array device 13 is configured to store the sound processing time corresponding to the beam mode in the storage unit 71 in advance. In addition, the speaker array device 13 is configured to transmit and receive information on the audio processing time corresponding to the set beam mode to and from the television device 11. This ensures that the image displayed on the monitor 31 of the television device 11 and the sound emitted from the speaker array 65 are synchronized with each other regardless of which beam mode is set in the speaker array device 13.

[Second Embodiment]
Next, an AV system 2 according to the second embodiment of the present invention will be described. FIG. 5 is a block diagram showing a schematic configuration of an AV system according to the second embodiment of the present invention.

  The AV system 2 includes a television device 11, a speaker array device 13, and a DVD player (source device) 15.

  The television device 11 and the speaker array device 13 are the same as those shown in FIG. The AV system 2 according to the second embodiment is different from the first embodiment in that content is transmitted from the DVD player 15 to the television device 11 and the speaker array device 13.

  The DVD player 15 includes a DVD playback unit 81, a decoder 83, a video signal output unit 85, an audio signal output unit 87, a communication unit 89, a control unit 91, a storage unit 93, and an operation unit 95.

  The DVD playback unit 81 reads the information signal of the content recorded on the DVD and outputs it to the decoder 83.

  The decoder 83 decodes the content information signal and extracts a video signal and an audio signal. Then, the decoder 83 outputs the video signal to the video signal output unit 85 and outputs the audio signal to the audio signal output unit 87.

  The video signal output unit 85 is an interface for outputting the video signal supplied from the decoder 83 to the outside.

  The audio signal output unit 87 is an interface for outputting the audio signal supplied from the decoder 83 to the outside.

  The communication unit 89 can transmit and receive control information with other devices.

  The control unit 91 controls each unit of the DVD player 15.

  The storage unit 93 stores time information necessary for the DVD player 15 to perform video processing.

  The operation unit 95 receives user operations on the DVD player 15.

  The video signal output unit 85 of the DVD player 15 is connected to the signal input unit 25 of the television apparatus 11 by the cable 16. The audio signal output unit 87 of the DVD player 15 is connected to the signal input unit 51 of the speaker array device 13 by the cable 17. Further, the communication unit 39 of the television device 11 is connected to the communication unit 73 of the speaker array device 13 by the cable 14.

  In the AV system 2 shown in FIG. 5, the video signal of the DVD content reproduced by the DVD player 15 is output to the television device 11 and the audio signal is output to the speaker array device 13. Also, the communication unit 39 of the television device 11 and the communication unit 73 of the speaker array device 13 are connected to the video signal processing time information in the television device 11 and the audio signal processing time information in the speaker array device 13 via the cable 14. , Send and receive. If (video signal processing time)> (audio signal processing time), the speaker array device 13 calculates the difference between the processing times of both signals, and delays the output timing of the audio signal by the difference time. Let If (video signal processing time) <(audio signal processing time), the television apparatus 11 calculates the difference between the processing times of both signals, and delays the output timing of the video signal by the difference time. . By processing in this way, even when the content is reproduced by the DVD player 15, it is possible to prevent the occurrence of lip sync deviation.

  As described above, the two lip sync methods have been described in the first and second embodiments. However, when actually used as a system, these methods can be switched as appropriate. That is, when the input content to the speaker array device 13 is from the source device, the method of the second embodiment is adopted, and when the input content is input from the other TV device side or the like, the method of the first embodiment is used. It is good to let it lip-sync.

  Furthermore, in the AV system 2 according to the second embodiment of the present invention, the television device 11 and the speaker array device 13 can be set not only in an equal relationship but also in a master-slave relationship. That is, in the AV system 2 shown in FIG. 5, when the television device 11 is the master (master) and the speaker array device 13 is the slave (slave), the following processing is performed. First, the control unit 45 of the television device 11 reads the processing time information of the audio signal recorded in the storage unit 71 of the speaker array device 13. Subsequently, the control unit 45 reads the processing time information of the video signal from the storage unit 41. Further, the difference between the processing times of both signals is calculated. Then, when (video signal processing time)> (audio signal processing time), the control unit 45 instructs the speaker array device 13 to delay the output timing of the audio signal by the difference time. To do.

  Further, when (video signal processing time) <(audio signal processing time), the control unit 45 calculates the difference between the processing times of both signals, and sends the video signal to the video delay unit 29 for the difference time. Delay the output timing. In the AV system 2 shown in FIG. 5, when the speaker array device 13 is the master (master) and the television device 11 is the slave (slave), the processing of the television device 11 and the speaker array device 13 in the above processing. It is sufficient to set so that the processing is read in reverse.

[Third Embodiment]
Next, FIG. 6 is a block diagram showing a schematic configuration of an AV system according to the third embodiment of the present invention. FIG. 7 is a timing chart of video processing and audio processing in the AV system. The AV system 3 according to the third embodiment of the present invention is different from the first and second embodiments in that content is transmitted from the DVD player 15 ′ to the television device 11 via the speaker array device 13 ′.

  In the AV system 3 shown in FIG. 6, the television device 11 has the same configuration as that shown in FIGS. 1 and 5. The speaker array device 13 'has the same configuration as the speaker array device 13 shown in FIG. The DVD player 15 'has the same configuration as the DVD player 15 shown in FIG. Therefore, only differences will be described for the configuration of each device.

  The speaker array device 13 'is obtained by replacing the signal input unit 51 of the speaker array device 13 with a signal input unit 51'. In the speaker array device 13 shown in FIGS. 1 and 5, only the audio signal is inputted to the signal input unit 51, but the video signal / audio signal is inputted to the signal input unit 51 ′ shown in FIG. Is done.

  The DVD player 15 ′ is obtained by replacing the video signal output unit 85 and the audio signal output unit 87 of the DVD player 15 with an audio / video signal output unit 86. The audio / video signal output unit 86 is an interface for outputting the audio signal and the video signal supplied from the decoder 83 to the outside.

  In the AV system 3, the audio / video signal output unit 86 of the DVD player 15 '(source device) is connected to the signal input unit 51' of the speaker array device 13 '(repeater device) by the cable 18-1. The communication unit 89 of the DVD player 15 ′ is connected to the communication unit 73 of the speaker array device 13 ′ by a cable 18-2.

  Further, the signal output unit 54 of the speaker array device 13 '(repeater device) is connected to the signal input unit 25 of the television device 11 (sink device) by a cable 14-1. In addition, the communication unit 73 of the speaker array device 13 ′ is connected to the communication unit 39 of the television device 11 through the cable 14-2.

  That is, the AV system 3 has a configuration in which a source device, one or a plurality of repeater devices, and a sink device are connected in series and a signal is output to a subsequent device.

  The repeater device includes a signal switcher in addition to an AV amplifier and a speaker array device.

  In FIG. 6, the cable 14-1 and the cable 14-2 are shown separately, but in actuality, it is one HDMI (registered trademark) cable 14, and the cable 18-1 and the cable 18-2 are also one. This is an HDMI (registered trademark) cable 18.

  In order to lip-sync with the AV system 3 having the configuration as shown in FIG. 6, the processing time of the video signal and the processing time of the audio signal in each device, or the difference between the processing times of both signals is determined by another connecting device. It is good to be configured to inform the

  For example, a case where a video of content reproduced by a DVD player 15 ′ is displayed on the television device 11 and a sound effect is added to the sound of the content in the speaker array device 13 ′ to emit sound from the speaker of the television device 11 is used. explain. In this case, as shown in FIG. 7, the speaker array device 13 ′ adds an acoustic effect to the audio signal and does not perform time-consuming processing on the video signal. Therefore, in the speaker array device 13 ′, the audio signal processing time is longer than the video signal processing time. On the other hand, the television apparatus 11 performs video signal processing to display video on a monitor, but does not perform time-consuming processing on audio signals. Therefore, in the television apparatus 11, the processing time of the video signal is longer than the processing time of the audio signal. In this example, the audio signal processing time is longer than the video signal processing time when viewed from the entire AV system 3. Therefore, in the AV system 3, one of the constituent devices becomes the main (master) and communicates with other connection devices by the communication unit, and the processing time of the video signal and the processing time of the audio signal in each device, Alternatively, the difference between the processing times of both signals is acquired from the connection device. Also, the main device calculates the difference between the video signal processing time and the audio signal processing time of the entire AV system 3 by the control unit. Then, in order to prevent a lip sync shift from occurring based on the difference information, one of the devices performs the delay processing of the video signal or the audio signal in accordance with the amount of buffer memory for delay processing of each device. It is good to configure.

  As a result, the amount of buffer memory for delay processing of each device can be suppressed. That is, as shown in FIG. 7, the difference between the processing time of the video signal and the audio signal for each apparatus is quite large. Therefore, when each apparatus is provided with a buffer memory that can be adjusted so that there is no difference between apparatuses as in a conventional television apparatus, the amount of buffer memory as a whole system becomes large. However, in the present invention, the difference between the processing times of the video signal and the audio signal is obtained for the AV system 3 as a whole, and the delay processing is collectively performed by a certain device. Therefore, the amount of buffer memory can be suppressed as a whole system. In other words, even if the amount of buffer memory installed in each device is reduced, the entire system can be adjusted so that there is no difference.

  Next, the video of the content reproduced by the DVD player 15 ′ (source device) is displayed on the television device 11, and an acoustic effect is added to the sound of the content, and sound is emitted from the speaker array 65 of the speaker array device 13 ′. Explain the case. In the case of this configuration, an audio signal is not emitted from the television device 11, but the difference information between the video signal processing time and the audio signal processing time in the television device 11 is notified to the speaker array device 13 '.

  When configured as described above, that is, when the final video display device used for viewing is different from the audio reproduction device, the delay amount of the device after the device that outputs one earlier (downstream) is ignored. Set as follows. For example, as described above, in the configuration of DVD player 15 ′ (source device) → speaker array device 13 ′ (repeater device) → TV device 11 (sink device), the speaker array device 13 ′ emits sound, and the TV When the device 11 displays an image, the audio delay amount of the television device 11 is ignored and set to 0 seconds.

  Next, in the AV system 3 shown in FIG. 6, information on the maximum time (maximum delay amount (buffer memory amount)) in which the video signal and the audio signal can be delayed in each device is transmitted to the master by the communication unit. It is also possible to notify the device, and the device serving as the master notifies each device of the amount of sharing by the communication unit based on this information.

  With this configuration, since the delay time that can be processed by each device is known, one of the devices becomes the master (master), and the signal delay of the entire AV system 3 depends on the amount of buffer memory of each device. , It becomes possible to share. Accordingly, the difference in time required for processing the video signal and the audio signal can be seen in the entire AV system, so that the difference can be reduced and the correction of the difference can be distributed to each device. The amount of memory can be reduced.

  FIG. 6 shows a configuration in which a DVD player 15 ′ (source device) → speaker array device 13 ′ (repeater device) → TV device 11 (sink device) is connected in series as an example of the AV system. The present invention is not limited to this, and may have other configurations. For example, in the AV system 1 shown in FIG. 1, it is possible to connect a source device such as a DVD player or a video playback device to the signal input unit 25 of the television device 11. In this case, the television device 11 becomes a repeater device, and the speaker array device 13 becomes a sink device.

  In the AV system 3 shown in FIG. 6, a switch (selector) can be connected to the signal input unit 51, and a plurality of source devices can be connected to the switch. As the plurality of source devices, for example, a DVD player, a disk game machine, a hard disk recorder, and the like are suitable. In such a connection, two repeater devices are connected between the source device and the sink device.

  In each of the above embodiments, the time required for processing the video signal and the audio signal, and the difference between the processing times of both signals are the resolution of the video to be displayed on the monitor 31 of the television device 11, the mode of the sound field processing, etc. It depends on the video and audio settings.

  For example, the processing time of the video signal differs depending on the image correction processing such as video resolution, game mode, progressive conversion (IP conversion), scaling, and contour enhancement. The processing time of the audio signal varies depending on the audio format (compression system, non-compression system), DSP mode, audio beam mode, audio beam path length, and the like.

  As described above, in the speaker array device 13 ′, when a 5-channel sound beam is output, the center channel directly reaches the viewing position L, so the path length is short. On the other hand, since the rear channel (SLch, SRch) reaches the viewing position L after being reflected twice on the wall of the room, the path length becomes long. Also, since the path length varies depending on the size of the room to be installed, the amount of delay (audio signal processing time) corresponding to the size of the room is stored, or the amount of delay (audio signal processing time) is set when the apparatus is installed. It is necessary to calculate and store it in the storage unit.

  Therefore, in the present invention, the processing time of the video signal and the audio signal is stored according to the video (audio) setting (mode) selected by the user.

  The television apparatus 11 and the speaker array apparatus 13 ′ store the processing time (delay amount) of the video signal and the audio signal in accordance with the video resolution, the sound field processing mode, etc. in the storage unit in a table format as shown in FIG. I remember it.

  FIG. 8 is a table for managing the processing time of the video signal and the audio signal according to the video resolution, the sound field processing mode, and the like. The processing time (delay amount) shown in FIG. 8 is an example shown so that the explanation can be easily understood.

  For example, as shown in FIG. 8A, in the television apparatus 11, when the input resolution is 480i and the output resolution is 480i, the processing time (delay amount) of the video signal is 5 msec. On the other hand, when the input resolution is 480i and the output resolution is 1080i, the processing time (delay amount) of the video signal is 90 msec.

  As shown in FIG. 8B, in the speaker array device 13 ′, as a sound effect to be added to the audio signal, the processing time (delay amount) of the audio signal is 40 msec in the sports mode. When the concert hall mode is selected as the acoustic effect, the audio signal processing time (delay amount) is 60 msec.

  Furthermore, as shown in FIG. 8C, when the audio signal format is AAC, the audio signal processing time (delay amount) is 15 msec, and when the audio signal format is MP3, the audio signal The processing time (delay amount) is 20 msec.

  Thus, the video signal processing time varies depending on the resolution of the video, and the audio signal processing time varies depending on the audio program or audio format. Therefore, it is necessary to change the delay amount according to the selected resolution, audio program, and the like.

  When managing the processing time of an audio signal and a video signal using an HDMI (registered trademark) vendor command, the following is preferable. For example, processing time information for audio signals and video signals may be stored in the EDID. Further, the delay amount information or the change of the delay amount is transmitted using any one of HDMI (registered trademark) Info Frame, HDMI (registered trademark) CEC, or DDC.

  In the above description, the configuration has been described in which the storage unit stores the processing time (delay amount) of the video signal and the audio signal and the difference between the processing times of both signals. However, the present invention is not limited to this, and may have other configurations. For example, a test disc on which test data is recorded so that video and audio are output simultaneously, or a test signal generator as a source, a light receiving sensor is installed on the TV screen, and a microphone for receiving audio at the user's viewing position (Mic 66) is installed. Then, according to the change (trigger) timing of the both, the delay amount or the difference between them is measured and the above setting is performed.

  In the above description, the case where the speaker array device is used has been described as an example. However, the present invention is not limited to this, and a speaker in which one or a plurality of speakers are connected to an AV amplifier is used. Of course, there is no problem even if it is used instead of the array device.

[Fourth Embodiment]
Next, an AV system according to the fourth embodiment of the present invention will be described. In the first to third embodiments, the processing for eliminating the deviation between video and audio has been described. However, in the following, when the audio of the same content is reproduced by a plurality of AV devices, the processing for eliminating the deviation between the AV devices. Will be explained. FIG. 9 is a diagram showing the relationship between the schematic configuration of a conventional AV system and the processing time. FIG. 10 is a block diagram showing a schematic configuration of an AV system according to the fourth embodiment of the present invention. FIG. 11 is a diagram showing the relationship of processing time in the AV system according to the fourth embodiment of the present invention.

  The AV system 4 shown in FIG. 9A includes a music player 10 that is an audio playback device (source device), a speaker array device 13 that is a first AV device, a subwoofer 19 that is a second AV device, It has. The music player 10 broadcasts an audio signal of content to the speaker array device 13 and the subwoofer 19. The speaker array device 13 and the subwoofer 19 each reproduce the audio of the content.

  In the conventional AV system 4, the speaker array device 13 does not have a configuration for transmitting time information necessary for content reproduction to the subwoofer 19 or a configuration for the subwoofer 19 to delay audio. Further, the time required for the audio reproduction processing performed by the subwoofer 19 is shorter (slightly) than that of the speaker array device 13, and time-consuming processing such as DSP processing is not performed. Further, as described above, in the speaker array device 13, the sound beam is reflected directly or once or twice on the wall in accordance with the channel and propagates (arrives) to the listener's listening position at the same time. The time is considerably longer than the subwoofer 19. For this reason, as shown in FIG. 9B, the sound (low sound) emitted by the subwoofer 19 propagated to the listening position earlier than the sound (sound beam) emitted by the speaker array device 13. .

  In order to prevent the occurrence of such a problem, an AV system 4 'improved from the AV system 4 has the following configuration. That is, as shown in FIG. 10, the speaker array device 13 receives time information required for content reproduction processing, that is, time information required for audio beam delay processing and content sound until the audio reaches the viewing position. A configuration (communication unit 73) for transmitting information such as time (reproduction processing time information) to the subwoofer 19 is provided. In addition, the subwoofer 19 receives the reproduction processing time information transmitted from the speaker array device 13 (communication unit 111) and the sound emitted from the speaker based on the reproduction processing time information received from the speaker array device 13. A delay circuit for delaying is provided.

  With such a configuration, as shown in FIG. 11, the sound emitted from the subwoofer 19 is synchronized with the sound beam emitted from the speaker array device 13 which is the AV device having the latest reproduction timing. That is, the sound emitted from the subwoofer 19 can be delayed so as to be simultaneously transmitted to the listening position. Thereby, surround sound can be emitted without giving a sense of incongruity to the listener.

  In the AV system 4 ′ described above, it is known in advance that the subwoofer 19 always has a shorter time required for the reproduction process than the speaker array device 13. In such a case, the woofer 19 which is an AV device having a short time required for the reproduction process receives information for delaying the reproduction of the content from the speaker array device 13 which is another AV device, and reproduces the content. It is configured so as to have only a configuration for delaying. As a result, it is not necessary to adjust the playback timing of the content with other AV devices, so that the configuration can be simplified.

  On the other hand, when an AV device having a short time required for playback processing cannot be specified among a plurality of AV devices, playback processing time information is transmitted and received between the AV devices at the time of initial setting, and playback is performed based on this information. An AV device having a short processing time is determined. Then, an AV device having a short time required for content playback processing is configured to receive playback processing time information from another AV device and delay the playback of the content.

  The detailed configuration of each device of the AV system 4 'is as shown in FIG. The music player 10 includes a storage unit 101, a playback unit 103, and a communication unit 105. The speaker array device 13 has the same configuration as that shown in FIG. The subwoofer 19 includes a communication unit 111, a bass sound generation unit 113, a delay circuit 115, an amplifier 117, and a speaker 119.

  In the music player 10, the reproduction unit 103 reads content data (two-channel audio data) from the storage unit 101 and reproduces it. The communication unit 105 superimposes the audio signal reproduced by the reproduction unit 103 on the radio wave and transmits it by broadcast. When the communication unit 73 receives a two-channel audio signal broadcast by the music player 10 by the communication unit 73, the speaker array device 13 uses the audio / video processing unit 53 to expand the audio signal (a surround audio signal) into a five-channel audio signal (DSP process). )I do. In addition, the delay processing unit 57 performs delay processing on the audio signals of other channels in accordance with the slowest channel that propagates (arrives) to the listening position. At this time, the speaker array device 13 transmits reproduction processing time information to the subwoofer 19 through the communication unit 73.

  The speaker array device 13 generates a sound beam for each channel by performing predetermined delay processing in the delay processing unit 57 based on the reproduction processing time information so that the sound beam of each channel propagates around the listening position. Thus, an audio beam is output from the speaker array 65.

  When the subwoofer 19 receives the two-channel audio signal broadcast by the music player 10 by the communication unit 111, the bass generation unit 113 adds the two-channel audio signal and extracts only the bass signal. Then, the delay circuit 115 delays the bass signal based on the reproduction processing time information transmitted from the speaker array device 13, amplifies it by the amplifier 117, and emits the sound from the speaker 119.

  Next, the present invention can be configured as described below. 12 and 13 are conceptual diagrams showing still another configuration of the present invention.

  As shown in FIG. 12A, the AV system 5 includes a DVD player 15 ′ as a source device, a speaker array device 13-1, a speaker array device 13-2, and a subwoofer 19. The configuration of each device shown in FIG. 12 and FIG. 13 is almost the same as that shown in FIG. 1, FIG. 5, FIG. 6, and FIG. Each device illustrated in FIGS. 12 and 13 includes a communication unit that transmits and receives an audio signal and reproduction processing extended time information by broadcasting.

  The DVD player 15 ′ broadcasts the 7.1-channel audio signal 201 to the speaker array device 13-1, the speaker array device 13-2, and the subwoofer 19. Two speaker array apparatuses 13-1 and 13-2 generate sound beams for seven channels. For example, the speaker array device 13-1 is configured to generate Cch, Lch, and Rch sound beams, and the speaker array device 13-2 is configured to generate SLch, SRch, BLch, and BRch sound beams. The speaker array device 13-1 and the speaker array device 13-2 transmit and receive each other's reproduction processing time information 203A, and perform delay processing on other sound beams in accordance with the sound beam that has arrived at the listening position the latest. In addition, either the speaker array device 13-1 or the speaker array device 13-2 becomes a master and transmits reproduction processing time information 205A to the subwoofer 19 (in FIG. 12A, the speaker array device 13- 1 is transmitting.) With this configuration, as in the configuration shown in FIG. 10, the sound emission timing of each device is adjusted, and the sound of each channel is set to propagate (arrive) at the listening position at the same time. be able to.

  Furthermore, as shown in FIG. 12B, an AV amplifier device can be used instead of the speaker array device. Also in this case, similarly to the configuration of FIG. 12A, the reproduction processing time information 203B and the reproduction processing time information 205B are transmitted / received to another sound beam in accordance with the latest arrival sound at the listening position. What is necessary is just to perform a delay process.

  Next, as shown in FIG. 13A, a plurality of audio reproduction devices and video reproduction devices can be configured to transmit / receive delay processing information. The AV system 7 here has a configuration in which a subwoofer 19 is added to the AV system 2 described above. In this case as well, each other's playback processing time information 203C and playback processing time information 205C are transmitted and received, delay processing is performed on other audio beams in accordance with the latest arrival at the viewing position, and the sound propagates to the viewing position. The television 11 displays an image at the timing to perform. This allows the user at the viewing position to feel that the video and audio are synchronized (lip synced).

  Further, as shown in FIG. 13B, in the configuration in which video and audio content from the source device is transmitted to the television device via the speaker array device, the subwoofer 19 has the source device (DVD player 15). Delay time (depending on whether the signal is a signal (directly received from the source device) 202 transmitted by the broadcast from 202 or a signal from the speaker array device 13 (repeat signal received via another AV device) 202B. It is also possible to configure so as to switch the delay amount). In this case, the speaker array device 13 determines from which device the subwoofer 19 is set to receive a signal, and transmits the reproduction processing time information 205D corresponding thereto to the subwoofer 19. Then, similarly to the case of FIG. 13A, the television 11 displays the video at the timing when the sound propagates to the viewing position. Thus, the video and audio are synchronized in the entire system, and the user at the viewing position can feel that the video and audio are synchronized (lip-synced).

  As yet another configuration, the control unit 75 (corresponding to sound emission control means) of the speaker array device 13 starts sound emission (unmute) for the subwoofer 19 (AV device having a short time required for reproduction processing). Further, the subwoofer 19 may be configured to switch the operation in accordance with this signal by outputting a sound emission end (mute) to control the sound emission start timing.

  Since the speaker array device 13 performs DSP processing and delay processing as described above, it takes a longer time to emit sound than the subwoofer 19. In particular, the speaker array device 13 has a longer activation time from when the power is turned on until sound is emitted than the subwoofer 19, and the subwoofer 19 is activated before the reproduction processing time information is transmitted to the subwoofer 19. For this reason, only the subwoofer 19 emits the bass first. Therefore, as described above, the speaker array device 13 outputs a sound emission start (mute release) and sound emission end (mute) command to the subwoofer 19, and the subwoofer 19 operates according to this signal. Configure to switch.

  The speaker array device 13 can also be configured to output a volume setting command to the subwoofer 19, and the subwoofer 19 can switch the operation in accordance with this signal. In this case, the subwoofer 19 determines that the volume setting command is to cancel mute.

  With this configuration, it is possible to prevent the subwoofer 19 from emitting low sounds first, and it is possible to simultaneously emit the speaker array device 13 and the subwoofer 19.

1, 2, 3 ... AV system 11 ... TV device 12, 14, 16, 17, 18 ... Cable 13 ... Speaker array device 15 ... DVD player 20 ... Antenna 21 ... Receiver 23 ... Decoder 25 ... Signal input unit 27 ... Video Processing unit 29 ... Video delay unit 31 ... Monitor 33 ... Audio delay unit 34, 61 ... D / A converter 35 ... Power amplifier 36 ... Speaker 37 ... Audio output unit 39 ... Communication unit 41 ... Storage unit 43 ... Operation unit 45 ... Control Reference numeral 51 ... Signal input part 53 ... Video / audio processing part 54 ... Signal output part 57 ... Delay processing part 63 ... Power amplifier 65 ... Speaker array 65 ... Speaker unit 66 ... Microphone 67 ... A / D converter 69 ... Operating part 71 ... Memory Unit 73 ... Communication unit 75 ... Control unit 81 ... DVD playback unit 83 ... decoder 85 ... video signal output unit 87 ... audio signal output unit 89 ... communication unit 91 ... control unit 93 ... storage unit 95 ... operation unit

Claims (4)

In an AV system that inputs / outputs content, processes the signal of the content, and reproduces the content on a plurality of AV devices,
The AV device
First communication means for transmitting and receiving information relating to the playback timing of the content, display means for playing back the video of the content, and delay means for delaying the audio signal of the content in accordance with the playback timing of the video and outputting it to another AV device A video playback device having
An audio reproduction device having second communication means for transmitting and receiving information relating to the reproduction timing of the content, and sound emission means for reproducing the audio signal of the content output by the video reproduction device;
With
The second communication means transmits an audio processing time necessary for audio processing of the content as information related to the reproduction timing to the video reproduction device,
The AV system according to claim 1, wherein the delay means of the video reproduction device reduces the delay time of the audio signal based on the information of the audio processing time received from the audio reproduction device. The video playback device includes video processing means for processing the video signal of the content, and first audio processing means for processing the audio signal of the content,
The audio reproduction device includes second audio processing means for processing an audio signal of the content,
The delay means is the sum of the audio processing times required for the first audio processing means and the second audio processing means to process the audio signals, and is necessary for the video processing means to process the video signals. 2. The AV system according to claim 1, wherein when the video processing time is longer than the video processing time, the video playback timing is delayed by a difference between the sum of the audio processing times and the video processing time. The sound reproducing device distributes a sound signal to a plurality of speakers of the speaker array and a plurality of speakers of the speaker array, adjusts sound emission timing for each sound channel, and converts a plurality of sound beams into sound beams, Beam control means for simultaneously reaching the viewing position,
The AV system according to claim 1, wherein the audio processing time in the audio reproduction device includes a time for audio to reach the viewing position. The beam control means of the sound reproducing device includes a plurality of beam modes for changing positions where the plurality of sounds converted into sound beams are reflected on the wall,
The AV system according to claim 3, wherein the audio processing time is changed according to a beam mode selected in the audio reproduction device.

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