JP2008136027A - Video and sound playback system and video player - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To synchronize video playback with sound playback in a video playback device and a sound playback device connected to a network. <P>SOLUTION: Although a projector 300 and an acoustic system 400 which receive digital stream data through the network 110 independently perform video playback/sound playback, the acoustic system 400 generates a signal for video playback suitable for video playback in an image forming and projecting part 302 belonging to the projector 300 by including the synchronizing signal of the signal for video playback in a video signal included in the digital stream data and then transmits the signal for video playback by radio. The projector 300 receives the signal for video playback in the form of a radio signal, demodulates the signal for video playback and plays back video in the image forming and projecting part 302 on the basis of the signal for video playback. The acoustic system 400 performs sound playback on condition that a reception signal of the signal for video playback transmitted from the projector 300 side is inputted. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a video / audio playback system including a video playback device having a video playback device, an audio playback device having an audio playback device, and a content transmission device for video / audio content connected to a network, and the network connected to the network. The present invention relates to a video playback apparatus that plays back video based on a video signal input via the network.

  In recent years, digital-compatible AV (Audio Visual) devices such as large televisions and projectors, DVD (Digital Versatile Disk) players, CD (Compact Disc) players, 5.1ch surround sound playback devices, and the like are becoming widespread. Among these devices, large televisions and projectors that reproduce video and audio handle video and audio content that includes the synchronized video and audio signals as video and audio playback signals. As this audio-video content, for example, there is MPEG2 (Moving Picture Experts Group phase 2). In this MPEG2, the video signal and the audio signal are compressed by the MPEG standard, and both signals are synchronized. Large TVs and projectors receive this MPEG2 data from a DVD player built in these devices or a DVD player connected via an external terminal attached to the device, and receive the video signal and audio signal included in the video / audio content (MPEG2). Video processing and audio playback are performed in the signal processing for each playback. This relationship also applies to transmission / reception reproduction in so-called digital television broadcasting.

  By the way, when the video signal and the audio signal are subjected to signal processing for reproduction in this way, there is a difference between the video reproduction and the audio reproduction due to the difference in processing speed between the video signal processing and the audio signal processing. Therefore, a coping technique for synchronizing video reproduction and audio reproduction has been proposed (for example, Patent Document 1), and such synchronization countermeasures have reduced the viewer's uncomfortable feeling. In this patent document, synchronization of video playback and audio playback in an AV device (video / audio playback device) capable of video / audio playback, such as a large television or a projector, video playback in the video / audio playback device, and the device There has been proposed a countermeasure for synchronization with audio reproduction in an audio reproduction apparatus directly connected to the audio transmission cable (optical digital cable). As this synchronization countermeasure, an audio signal output delay to a speaker included in the video / audio reproduction device and an audio signal output delay to an audio transmission cable output terminal included in the video / audio reproduction device are performed.

JP 2005-184563 A

  On the other hand, a plurality of AV devices are connected via a network, video playback is performed on a large TV or projector, and an audio playback device that is a separate device from the large TV or projector, such as a 5.1ch surround sound playback device. Then, it is desired to perform audio reproduction. In other words, there is an increasing demand for users who listen to sound from a 5.1ch surround sound playback device while wearing a home living room as if it were a mini-theater and watching the video on a large TV or projector.

  However, when the video playback device and the audio playback device are connected via a network in this way, the problem that the synchronization countermeasure proposed in the above patent document cannot be applied as it is will be pointed out as described below. It was.

  The video playback device and the audio playback device each receive the same video / audio content (MPEG2) via the network, and the video playback device independently processes the video signal included in the content to perform the video playback, and the audio playback. Even in the device, the audio signal is independently processed to reproduce the sound. In other words, although the video playback device and the audio playback device are both connected to the network, the video playback device and the audio playback device are separate devices. (Output delay) cannot be applied as it is.

  In addition, since the transmission of video / audio content (MPEG2) to the video playback device and the audio playback device is via a network, depending on the data transmission status in the network, the transmission of the video / audio content to the video playback device via the network. It is expected that the time is different from the transmission time of the video / audio content to the audio reproduction device via the network, and the difference between the two transmission times is not steady. In other words, the synchronization countermeasure (audio signal output delay) as proposed in the above-mentioned patent document cannot be applied as it is because of network-specific circumstances in which data is transmitted to the video reproduction device and the audio reproduction device via the network.

  In the above-mentioned patent document, an audio playback signal generated on the side of the video / audio playback device is displayed as video for an audio playback device directly connected to the video / audio playback device via an audio transmission cable (optical digital cable). It is unilaterally output (delayed output) from the audio playback device side. In other words, when video playback and audio playback are individually performed by the video / audio playback device and the audio playback device, which are individual devices, the audio / video playback device that outputs the audio playback signal to the audio playback device with delay is used. Since only video playback is performed regardless of the state of audio playback on the device side, the reliability of video playback and audio playback synchronized between the audio / video playback device and the audio playback device as individual devices is high. I couldn't say that.

  The object of the present invention is to solve the above-mentioned problems of the prior art and to ensure the reliability of synchronization between video playback and audio playback when video playback / audio playback is performed between a video playback device and an audio playback device connected to a network. The purpose is to increase

  In order to achieve at least a part of the above-described object, in the video / audio reproduction system of the present invention, video / audio content including a video signal and an audio signal synchronized with each other is transmitted from the content transmission apparatus via the network. Transmit to the playback device and the audio playback device. The audio reproduction device and the video reproduction device each include a transmission / reception unit capable of mutual communication of data, and one reproduction device and the other reproduction device of the audio reproduction device and the video reproduction device are configured as follows. Has been. In the following description, for convenience of explanation, one playback device is described as an audio playback device, and the other playback device is described as a video playback device.

  An audio reproduction device that is one of the audio reproduction device and the video reproduction device includes a reproduction signal generation unit, a reproduction unit, and a transmission unit, and the reproduction signal generation unit transmits the reproduction signal from the content transmission device via the network. The audio signal included in the input video / audio content is processed for audio reproduction on the audio reproduction device to generate an audio reproduction signal suitable for audio reproduction on the audio reproduction device, and The video signal included in the received video / audio content is processed for video playback on the video playback device to generate a video playback signal suitable for video playback on the video playback device. Since the audio reproduction signal (one reproduction signal) generated in this way is output to the audio reproduction device (one reproduction device) of the audio reproduction device when a predetermined condition is satisfied by the reproduction unit of the audio reproduction device. The audio reproduction device reproduces audio based on the audio reproduction signal (one reproduction signal) in the audio reproduction device. That is, the sound reproduction by the sound reproducing device of the sound reproducing device is performed after the predetermined condition is satisfied. The audio reproduction apparatus that performs such signal generation / audio reproduction includes the video reproduction signal (for reproduction by the video reproduction device (the other reproduction device)) included in the video reproduction apparatus (the other reproduction device). The other reproduction signal) and the synchronization signal for synchronization included in the input video / audio content are transmitted via the transmission / reception unit by the transmission unit.

  The video reproduction device as the other reproduction device includes a reception signal transmission unit and a reproduction unit, and a video reproduction signal (the other reproduction unit) transmitted from the transmission unit of the audio reproduction device (one reproduction device) via the transmission / reception unit. Signal) and the synchronization signal are received by the transmission / reception unit of the video reproduction device (the other reproduction device), the reception signal transmission unit reproduces the reception signal indicating that the signal has been received via the transmission / reception unit. It transmits to the said transmission / reception part of an apparatus (one reproduction | regeneration apparatus). In addition, the video playback device (the other playback device) included in the video playback device (the other playback device) receives the video playback signal (the other playback signal) received from the audio playback device (the other playback device) by the playback unit. ) Based on the synchronization signal, and the video reproduction device (the other reproduction device) reproduces the video based on the video reproduction signal (the other reproduction signal).

  Then, an audio playback device (one playback) that transmits a playback video playback signal (the other playback signal) together with a synchronization signal to a video playback device (the other playback device) of the video playback device (the other playback device). When the reception signal transmitted via the transmission / reception unit is received by the transmission unit of the video reproduction device (the other reproduction device), the device recognizes that the predetermined condition is satisfied, and the reproduction unit transmits an audio reproduction signal ( One reproduction signal) is output to a sound reproduction device (one reproduction device), and sound is reproduced based on this sound reproduction signal (one reproduction signal).

  As described above, audio reproduction and video reproduction are performed by the audio reproduction apparatus (one reproduction apparatus) in the former and the video reproduction apparatus (the other reproduction apparatus) in the latter, but the audio reproduction apparatus (one reproduction apparatus). When performing audio playback on the audio playback device (one playback device), the video playback signal (the other playback device) transmitted from the audio playback device (one playback device) to the video playback device (the other playback device) Signal) and synchronization signal are received by the video playback device (the other playback device), and the audio playback by the audio playback device (one playback device) and the video playback device (the other playback device) Video reproduction is performed based on a common synchronization signal. Therefore, although audio playback and video playback are performed separately by the audio playback device and video playback device connected to the network, the reliability of synchronization between video playback and audio playback can be improved, and video based on high reliability.・ Synchronization of audio playback can reduce the sense of discomfort based on the difference between audio playback and video playback for the viewer who listens to the audio while watching the video. Such synchronization of audio reproduction and video reproduction is achieved by connecting the audio reproduction apparatus, the video reproduction apparatus, and the content transmission apparatus, which are independent as separate devices, to the network, and then transmitting the video and audio from the content transmission apparatus. This can be achieved simply by transmitting content via a network, and is simple.

  In this case, one playback device is an audio playback device and the other playback device is a video playback device, but the reverse is also possible. Then, if one playback device is an audio playback device and the other playback device is a video playback device, the video playback device receives a video playback signal suitable for video playback on the video playback device it has. Prompt video reproduction based on the reproduction signal can be performed.

  In the video / audio reproduction system of the present invention described above, each of the audio reproduction device and the video reproduction device may be configured so that a user can adjust the reproduction status of video or audio on the reproduction device of each reproduction device. When the reproduction adjustment unit to be operated and the reproduction adjustment of the user by the reproduction adjustment unit are reproduction adjustments related to synchronous reproduction of video and audio, a reproduction adjustment control signal indicating the state of the reproduction adjustment is generated, A reproduction adjustment signal transmission unit that transmits the reproduction adjustment control signal to the transmission unit of the other reproduction device via a transmission / reception unit, and when a reproduction adjustment operation by the user is performed by the reproduction adjustment unit, the reproduction adjustment signal is transmitted according to the operation. A first reproduction adjustment execution unit for performing reproduction adjustment of video or audio in the device, and the reproduction adjustment signal transmission that the other reproduction device has the reproduction adjustment control signal Upon receiving through the transceiver from, it is also possible to make and a second reproduction adjustment execution section for reproducing adjustment for the synchronous playback expedient to the reproduction adjustment control signal received said.

  In this way, for example, in a video playback device performing video playback, the user performs adjustments related to video / audio synchronized playback, for example, playback including at least one of video pause, playback stop, rewind or fast-forward. When any of these adjustments is made, the video playback device that is the target of these operations stops video playback and adjusts the playback status, while the audio playback device that performs audio playback also responds to user operations. Playback adjustments can be made. Therefore, the individual audio playback device and video playback device connected to the network can be handled as a single video / playback device, which is user-friendly.

  In addition, the video playback device having one playback device as an audio playback device and the other playback device as a video playback device is provided with an audio playback device associated with the video playback device. For audio / video playback on the video playback device and the audio playback device associated with the apparatus, the audio signal included in the video / audio content received via the network is played back on the audio playback device associated with the apparatus. Processing for generating an audio reproduction signal suitable for audio reproduction in the apparatus-associated audio reproduction device, and generating the video signal included in the received video / audio content in the video reproduction device A video playback signal suitable for video playback on the video playback device is generated by processing for video playback, and after the generation Audio playback on the device-associated audio playback device using the audio playback signal and video playback on the video playback device using the generated video playback signal are synchronized based on the synchronization signal included in the video / audio content. And a synchronization unit within the video playback device to be executed, and a priority order of audio playback on the audio playback device and audio playback on the device-associated audio playback device of the audio playback device is determined based on a predetermined order defining condition In addition, when priority is given to audio reproduction by the audio reproduction device included in the audio reproduction device, a video reproduction device synchronization stop unit that stops the operation of the video reproduction device synchronization unit may be provided. it can.

  In this way, as described above, in addition to performing video playback synchronization on the video playback device side based on the video playback signal received from the audio playback device side, video playback and audio using only the video playback device. Playback can be performed synchronously.

  In this case, when the same video / audio content from the content transmission apparatus is transmitted to both the video reproduction apparatus and the audio reproduction apparatus and the audio reproduction is executed by the audio reproduction apparatus, and the apparatus When there is a user operation to stop the audio playback on the accompanying audio playback device, the audio playback on the audio playback device is actually performed, or the user plays the audio playback on the audio playback device. It can be said that it wants. Therefore, in such a case, it is assumed that the order defining condition for giving priority to the audio reproduction by the audio reproduction device is satisfied, and the audio reproduction by the audio reproduction device of the audio reproduction device is performed.

  The video / audio reproduction according to the present invention described above is not only a video / audio reproduction system that is already provided by individually connecting an audio reproduction device, a video reproduction device, and a content transmission device to a network, but also connected to a network and connected via the network. The present invention can also be applied as a video playback apparatus that can receive signals. That is, by connecting such a video playback device to a network to which the audio playback device and the content transmission device are already connected, the audio playback on the audio playback device and the video playback on the video playback device are synchronized. Can be executed.

  Hereinafter, embodiments of the present invention will be described based on examples. FIG. 1 is a block diagram schematically showing the configuration of a video / audio reproduction system 100 as an embodiment of the present invention. As illustrated, the video / audio reproduction system 100 includes a content transmission device 200, a projector 300, and an audio device 400 connected to a network 110, and the content transmission device 200 connects the projector 300 and the audio device 400 via the network 110. Send digital stream data. This digital stream data is a video / audio content (MPEG-TS (Motion Picture Expert Group-Transport Stream)) including a digital video signal and an audio signal that are synchronized with the MPEG2 standard and synchronized. Then, the image forming / projecting unit 302 included therein reproduces a video composed of video data of MPEG2 data and projects it onto the screen S, and the acoustic device 400 is composed of audio data of MPEG2 data using the speaker 402 included therein. Play audio. In addition, the video / audio reproduction system 100 includes a digital broadcast receiver 450, a DVD player 460, and a CD player 470 connected to the network 110.

  The content transmission device 200 includes an internal hard disk 202, an external hard disk 204, a content transmission control unit 206, and a network driver 208. The content transmitting apparatus 200 stores the digital stream data provided by the digital broadcast receiving apparatus 450 and the DVD player 460 in the hard disk 202, the hard disk 204, etc., and the stored digital stream data is networked by the content transmission control unit 206. The data is transmitted to the network 110 via the driver 208. The digital stream data transmission at this time is executed in response to an operation instruction of a user operation device (not shown) (for example, a mouse or a keyboard), and the content transmission control unit 206 transmits the instruction to the projector 300 and the audio device 400 based on the instruction. Send digital stream data.

  The content transmission device 200 is configured by a computer, and cooperates with a CPU that executes logical operations, a ROM that stores programs and data, a RAM that performs good temporary data processing, and a program that performs the following. A function, that is, a data transmission function based on a user instruction is achieved. In this case, the data transmission from the content transmission device 200 is performed to both the projector 300 and the acoustic device 400, but the input destination of the digital stream data, for example, the content transmission device on the projector 300 and the acoustic device 400 side. 200, the digital broadcast receiving device 450, or one of the DVD players 460 can be designated, and the projector 300 and the sound device 400 can receive input of different digital stream data. For example, the audio device 400 inputs digital stream data for reproduction of audio only, and the projector 300 inputs digital stream data for reproduction of video only. As described above, a case where different digital stream data is input between the projector 300 and the sound device 400 will be described later.

  In addition to the image forming / projecting unit 302 described above, the projector 300 includes a network driver 310, a data decoder 312, a video player 314, an antenna 315, a wireless transceiver 316, a control unit 318, and a remote signal receiver 320. With. The data decoder 312 decodes a video signal included in digital stream data (MPEG2 data) received from the network 110 via the network driver 310. The video player 314 has two video data paths, and can store a plurality of video images composed of decoded video data from the data decoder 312 or video data obtained from the wireless transmitter / receiver 316 described later in units of frames. And a frame image in the buffer area is output to the image forming / projecting unit 302 based on the synchronization signal received from the wireless transceiver 316. The image forming and projecting unit 302 includes a liquid crystal display unit 303, displays an image based on a video reproduction signal on the display unit, projects the image with light from a light source device (not shown), and magnifies the image with a lens 304. The image is displayed on the screen S.

  As described above, the video data is input to the video player 314 in two systems because the video playback on the projector 300 is performed independently of the audio playback on the acoustic device 400 side, and the projector In preparation for performing video reproduction at 300 and audio reproduction at the audio device 400, data decoding at the data decoder 312 is executed under the control of the control unit 318. That is, when video reproduction is performed by the projector 300 alone, for example, when the projector 300 inputs digital stream data for reproduction of only video, the data decoder 312 performs data decoding under the control of the control unit 318. As a result, the video signal data included in the digital content data input via the network 110 is converted into video playback processing suitable for video playback in the image forming projection unit 302 by the cooperation of the data decoder 312 and the video player 314. After that, it is converted into a video reproduction signal and output to the image forming projection unit 302, and the image forming projection unit 302 reproduces the video. On the other hand, when video reproduction by the projector 300 and audio reproduction by the audio device 400 are performed, a video reproduction signal that has undergone data decoding and video reproduction processing is transmitted and received wirelessly from the audio device 400 side, as will be described later. In this case, the received video playback signal (received video playback signal) is output to the image forming projection unit 302, and the image forming projection unit 302 receives the video from the video playback unit 316. Is played.

  The video reproduction by the projector 300 alone and the determination when the video reproduction by the projector 300 and the audio reproduction by the audio device 400 are performed are determined by the video reproduction signal generated by the control unit 318 from the video signal in the input digital stream data of the projector 300. As will be described later, this can be done by comparing with a video reproduction signal transmitted from the audio device 400. In addition, when the video is reproduced with the reception video reproduction signal from the acoustic device 400 side, the synchronization signal associated with the signal is also received from the acoustic device 400 side together with the reception video reproduction signal. The order in which images (frame images) are reproduced in the image forming projection unit 302 after the output of the received video reproduction signal to the image forming projection unit 302 is determined by the signal. When data decoding is performed by the data decoder 312, an image (frame image) reproduction order by the decoded video reproduction signal is determined by a synchronization signal at the time of data decoding. The relationship between the reproduction signal and the synchronization signal is the same for the audio reproduction based on the audio reproduction signal on the acoustic device 400 side.

  The projector 300 includes a hard disk 321 in preparation for video pause, fast-forward playback, rewind playback, and the like, which will be described later, and temporarily outputs a video playback signal output from the video player 314 to the image forming projection unit 302. Store in the hard disk 321. The content stored in the hard disk 321 (video playback signal) is read by the video player 314 under the control of the control unit 318, and is used for pause, fast forward / rewind playback. As for fast-forward / rewind playback, although the speed (time) of fast-forward playback is limited depending on the buffer capacity of the video player 314 and the storage capacity of the hard disk 321, the video / audio playback system 100 of the present embodiment uses it. Since the audio / video playback is video / audio provided as digital stream data, since fast-forward / rewind playback is not planned for a long time, there is no particular problem and the capacity of the hard disk 321 is increased. Can be dealt with. The same applies to resuming playback after pausing.

  The wireless transmitter / receiver 316 of the projector 300 receives a wireless signal transmitted from an antenna 416 included in the acoustic device 400 described later, and demodulates the received signal. As will be described later, the audio device 400 transmits a video signal included in the digital stream data (MPEG2 data) received from the network 110 together with the synchronization signal in order to reproduce the video in the image forming projection unit 302 in the projector 300. Since it is decoded and wirelessly transmitted to the projector 300, the wireless transceiver 316 demodulates and generates a video reproduction signal (received video reproduction signal) and its synchronization signal from this wireless signal, and these signals are reproduced by the video player 314. Output to. Then, as described above, the video player 314 outputs the received video playback signal in units of frames based on the synchronization signal obtained from the audio device 400 side in the video playback signal (received video playback signal). The image is output to the forming projection unit 302 to reproduce the image. The synchronization between the video reproduction on the projector 300 side and the audio reproduction on the acoustic device 400 side performed in this way will be described later together with the description of the configuration and processing of the acoustic device 400.

  The control unit 318 of the projector 300 cooperates with a CPU that executes logical operations, a ROM that stores programs and data, a RAM and a program that performs good temporary data, and performs the reception signal transmission unit and playback of the present invention. Functions as an adjustment signal transmission unit, a reproduction adjustment unit, a reproduction adjustment execution unit, and the like. In other words, the control unit 318 receives the signal from the remote signal receiver 320 and controls each of the above-described devices so as to suit the reproduction status instructed by the user through the operation of the remote controller VR of the projector 300. Then, the control unit 318 receives a video reproduction signal (received video reproduction signal) by a radio signal from the acoustic device 400 side and a reception signal indicating that the synchronization signal has been received, or a user gives an instruction by operating the remote controller VR. A reproduction adjustment control signal indicating the state of reproduction adjustment suitable for the reproduction adjustment instruction is generated, and these signals are transmitted to the wireless transceiver 316. The wireless transmitter / receiver 316 modulates this signal (acceptance signal, reproduction adjustment control signal) into a wireless signal and transmits it to the acoustic device 400 side. The state of processing on the acoustic device 400 side that has received the wireless signal will be described later together with the description of the configuration and processing of the acoustic device 400.

  In addition to the speaker 402, the acoustic device 400 includes a network driver 410, a data decoder 412, a voice conversion / amplifier 413, a wireless transceiver 414, an antenna 416, a control unit 418, and a remote signal receiver 420. . The data decoder 412 decodes an audio signal included in digital stream data (MPEG2 data) received from the network 110 via the network driver 410. In this decoding, the synchronization signal included in the received digital stream data is also converted into the same type of data as the decoded audio signal data (decoded audio signal data), and the audio conversion / amplifier 413 The decoded audio signal data and the synchronization signal of the same kind of data are converted to analog for audio reproduction at the speaker 402, and the decoded audio signal data and the synchronization signal are amplified as analog audio signals and output to the speaker 402. . That is, the audio signal data included in the digital content data input via the network 110 is subjected to an audio reproduction process suitable for audio reproduction at the speaker 402 by the cooperation of the data decoder 412 and the audio conversion / amplifier 413. , Converted into a sound reproduction signal and output to the speaker 402. As a result, the speaker 402 reproduces audio based on the decoded audio signal data, and the reproduction is controlled by the control unit 418 as described later.

  The data decoder 412 of the audio device 400 that decodes the audio signal also decodes the video signal and the synchronization signal included in the digital stream data (MPEG2 data) received from the network 110 via the network driver 410. . At the time of decoding, a video playback process suitable for video playback in the image forming / projecting unit 302 of the projector 300 is performed by the data decoder 412, and the decoded video signal data (decoded audio signal data) is combined with a synchronization signal. It is sent to the wireless transceiver 414. The decoded video signal data sent to the wireless transmitter / receiver 414 in this manner becomes a video reproduction signal in the image forming / projecting unit 302 included in the projector 300, is wirelessly modulated by the wireless transmitter / receiver 414, and is then transmitted to the wireless transmitter / receiver. 414 is wirelessly transmitted to the wireless transceiver 316 of the projector 300 via each antenna. The wireless transmitter / receiver 316 that has received this wireless transmission outputs the demodulated video playback signal (received video playback signal) to the image forming projection unit 302 as described above. Done. The synchronization between the video reproduction and the audio reproduction by the audio device 400 will be described later. Note that the video signal decoding performed on the acoustic device 400 side as described above is performed by the image forming / projecting unit 302 by designating or selecting a video reproduction device type in the image forming / projecting unit 302 of the projector 300. It can be suitable for video playback.

  Even in the audio apparatus 400, the hard disk 421 is provided for the temporary stop, fast-forward playback, rewind playback, and the like of the video set on the projector 300 side, and for audio playback output from the audio conversion / amplifier 413 to the speaker 402. The signal is temporarily stored in the hard disk 421. The content stored in the hard disk 421 (audio reproduction signal) is read by the audio conversion / amplifier 413 under the control of the control unit 418, and used when resuming reproduction after the video is paused. Even in this case, as described above for fast-forward / rewind playback in the projector 300, the time that can be paused is limited according to the storage capacity of the hard disk 421, but as described above, there is a special problem. There is no.

  As described above, the wireless transmitter / receiver 414 of the acoustic device 400 performs wireless modulation for wireless transmission to the video playback signal (received video playback signal) in the image forming projection unit 302 of the projector 300, as well as the projector. The radio signal 300 transmitted via the radio transceiver 316 (the reception signal and the radio signal of the reproduction adjustment control signal described above) is received via the antenna 416, and the received signal is demodulated. The reception signal and reproduction adjustment control signal demodulated by the wireless transceiver 414 are output to the control unit 418.

  The control unit 418 of the audio device 400 cooperates with a CPU that executes logical operations, a ROM that stores programs and data, a RAM and programs that perform good temporary data, and performs the following. Functions as a signal transmission unit, a reproduction adjustment unit, a reproduction adjustment execution unit, and the like. That is, the control unit 418 receives the signal from the remote signal receiver 420 and controls each of the above-described devices so as to be suitable for the reproduction status instructed by the user through the operation of the remote controller MR of the audio device 400. Then, the control unit 418 starts sound reproduction based on a reception signal transmitted as a wireless signal from the projector 300 side, or shows a state of reproduction adjustment suitable for a reproduction adjustment instruction instructed by a user through a remote controller MR operation. The reproduction adjustment control signals shown are generated, and these signals are transmitted to the wireless transceiver 414. The wireless transceiver 414 modulates this signal (reproduction adjustment control signal) into a wireless signal and transmits it to the projector 300 side. The state of processing on the side of the projector 300 that has received the wireless signal will be described later.

  Next, video playback on the projector 300 side and audio playback on the acoustic device 400 side will be described. FIG. 2 is an explanatory diagram showing a state of video reproduction / audio reproduction when digital stream data is input from the content transmission apparatus 200 via the network 110.

  As shown in the figure, the digital stream data transmitted from the content transmission device 200 is transferred to the audio device 400 via the network 110, and the audio device 400 is digitally transmitted by the data decoder 412 and the audio conversion / amplifier 413. The audio signal and the video signal included in the stream data (MPEG2 data) are decoded, and as described above, the audio reproduction signal for audio reproduction by the speaker 402 and the image reproduction by the image forming projection unit 302 are reproduced. A video playback signal is generated. The sound reproduction signal generated in this way is output to the speaker 402 via the sound conversion / amplifier 413 included in the acoustic device 400 and used for sound reproduction. However, at this time, since the control unit 418 determines that the signal output condition is not satisfied, the audio reproduction signal output from the audio conversion / amplifier 413 (that is, the speaker 402) is controlled by the control unit 418. (Sound playback) is not executed.

  The audio device 400 wirelessly modulates a video playback signal generated for video playback in the image forming projection unit 302 together with an audio / video synchronization signal included in the digital stream data by a wireless transmitter / receiver 414 to perform the projector 300. Send to. The projector 300 receives and demodulates the wireless signal by the wireless transceiver 316, and receives that the video reproduction signal and the synchronization signal for image reproduction at the image forming projection unit 302 obtained by the demodulation have been received. A signal is generated by the control unit 318, and the reception signal is wirelessly modulated by the wireless transceiver 316 and then transmitted to the acoustic device 400.

  The acoustic device 400 receives and demodulates the wireless signal of the reception signal from the projector 300 by the wireless transceiver 414. Since the demodulated reception signal is sent from the wireless transceiver 414 to the control unit 418, the control unit 418 that has received this reception signal assumes that the output condition of the audio reproduction signal to the speaker 402 is satisfied, and the audio conversion / amplifier 413. And the execution of the audio reproduction signal output from the audio conversion / amplifier 413, that is, the audio reproduction by the speaker 402 is executed based on the synchronization signal. At this time, on the projector 300 side, after the wireless transmission of the reception signal, the video reproduction signal already obtained from the acoustic device 400 side is reproduced based on the synchronization signal. In the video reproduction by the projector 300 and the audio reproduction by the audio device 400, the video reproduction by the projector 300 includes the generation / radio modulation transmission of the video reproduction signal by the audio device 400 and the video reproduction signal by the projector 300. However, the time required for this demodulation is much shorter than the time required for decoding the digital stream data, and the time is only a few μs. It can be said that this is performed in synchronization with the sound reproduction performed by the audio device 400 after the reception signal is received. Therefore, it can be said that the viewer (user) who listens to the sound of the sound device 400 while watching the image of the projector 300 does not give a sense of incongruity that the image reproduction and the sound reproduction are clearly shifted, and this is practically not a problem. .

  Next, a case where the user pauses / restarts playback of video on the projector 300 side will be described. As shown in FIG. 2, when the user operates the remote controller VR and instructs to pause video playback during video / audio playback, the control unit 318 of the projector 300 receives the signal by the remote signal receiver 320. Then, an adjustment control signal indicating that playback is paused is generated. The adjustment control signal (playback pause signal) is wirelessly modulated by the wireless transceiver 316 and then transmitted to the acoustic device 400.

  The acoustic device 400 receives and demodulates the wireless signal of the adjustment control signal (reproduction pause signal) from the projector 300 by the wireless transceiver 414. Since the demodulated adjustment control signal (reproduction pause signal) is sent from the wireless transceiver 414 to the control unit 418, the control unit 418 that has received this adjustment control signal (reproduction pause signal) performs audio reproduction by the speaker 402. The audio conversion / amplifier 413 is controlled so as to make reproduction adjustment suitable for the adjustment control signal (reproduction pause signal), and in this case, the audio reproduction by the speaker 402 is paused. On the projector 300 side, the control unit 318 controls the video player 314 based on a video playback pause instruction from the remote controller VR by the user, so that video playback by the image forming projection unit 302 is paused.

  In the video playback pause in the projector 300 and the audio playback pause in the audio device 400, after the user's remote control operation, the audio playback pause in the audio device 400 is used for the adjustment control signal (playback in the projector 300). (Pause signal) generation / radio modulation transmission and signal decoding to the adjustment control signal (playback pause signal) in the acoustic device 400 are required. However, since the time is only a few μs, for the viewer (user) who listens to the sound of the acoustic device 400 while watching the image of the projector 300, the pause of the image and the pause of the sound are clearly shifted. It can be said that it does not give a sense of incongruity, but it is practically not a problem. Note that the above-described pause of playback is the same when the user gives an instruction to pause the sound via the remote controller MR on the sound device 400 side. In this case, the projector 300 is connected to the sound device 400. Based on the adjustment control signal (playback pause signal) received from the side, video playback is paused. The same applies when the user instructs the video / audio to be stopped by remote control operation.

  When the user issues a playback restart instruction from the remote controller VR of the projector 300 after the video / audio is paused, the control unit 318 of the projector 300 receives the signal by the remote signal receiver 320 and indicates that playback is restarted. The adjustment control signal is generated, and this adjustment control signal (reproduction resumption signal) is wirelessly transmitted to the acoustic device 400 via the wireless transceiver 316. Upon receiving this signal from the projector 300 side, the audio device 400 controls the audio conversion / amplifier 413 so that the control unit 418 matches the demodulated adjustment control signal (reproduction resume signal), and reproduces the audio from the speaker 402. Resume. On the projector 300 side, the control unit 318 controls the video player 314 based on an instruction to restart video playback from the remote controller VR, and restarts video playback by the image forming projection unit 302.

  Even when the video reproduction is resumed in the projector 300 and the audio reproduction is resumed in the acoustic device 400, the adjustment control signal (reproduction resume signal in the projector 300 is used for resuming the audio reproduction in the acoustic device 400, as in the case of the temporary stop described above. ) Wireless modulation transmission and signal decoding to the adjustment control signal (reproduction resumption signal) in the audio device 400 are required, but as described above, the user feels uncomfortable that video resumption and audio resumption are clearly shifted. It can be said that there is no problem. Note that this resumption of reproduction is also the same when the user gives an instruction via the remote controller MR on the acoustic device 400 side.

  When the user operates the remote controller VR during video / audio playback to instruct fast-forward playback or rewind playback of video playback, the execution range (execution time) of the buffer of the video player 314 or the hard disk Although it is affected by the storage capacity such as 321, the signal generation, wireless transmission, and the like are the same as in the case of the pause described above.

  However, when a reproduction adjustment that is not involved in the synchronization of the video reproduction and the audio reproduction, for example, a sound mute operation or volume adjustment on the acoustic device 400 side, the mute operation or volume adjustment only on the sound device 400 side is performed. The control unit 418 executes the reproduction adjustment (sound reproduction stop or volume increase / decrease setting) suitable for the control. In this case, since the signal related to the reproduction adjustment is not transmitted to the projector 300 from the acoustic device 400 side, the image is displayed on the projector 300 side even while the sound muting or volume adjustment is performed on the acoustic device 400 side. Playback will continue.

  As described above, the video / audio reproduction system 100 according to the present embodiment includes the projector 300 and the audio device 400 individually connected to the network 110, and separately performs video reproduction in the former and audio reproduction in the latter. In this case, on the condition that the projector 300 has received the video playback signal and the synchronization signal wirelessly transmitted from the audio device 400 to the projector 300, the audio playback on the audio device 400 and the video playback on the projector 300 are synchronized in common. Performed based on the signal. Therefore, although the audio apparatus 400 and the projector 300 connected to the network 110 individually perform audio reproduction and video reproduction, it is possible to execute the video reproduction and audio reproduction by the individual apparatus while synchronizing with high reliability. For this reason, a viewer who listens to the sound from the speaker 402 at a location away from the screen S or the projector 300 while watching the image of the screen S projected by the image forming projection unit 302 feels uncomfortable based on the difference between the sound reproduction and the image reproduction. Can be reduced. Such audio reproduction and video reproduction are synchronized from the content transmission apparatus 200 after the audio apparatus 400, the projector 300, and the content transmission apparatus 200, which are independent as separate devices, are individually connected to the network 110. This can be achieved simply by transmitting the digital stream data via the network 110, which is convenient.

  Further, in this embodiment, when the user performs an operation related to synchronized playback of video / audio, such as pause of playback, on the projector 300 side or the sound device 400 side, the remote controller The signal receiving side (for example, the projector 300) performs reproduction adjustment suitable for remote control operation, and transmits a control signal suitable for the reproduction adjustment to the audio apparatus 400 performing audio reproduction, so that the audio apparatus 400 The generation adjustment was also performed on the side. Therefore, the individual audio device 400 and the projector 300 connected to the network 110 can be handled as a single video / playback device, which is user-friendly.

  In this embodiment, a video reproduction signal for reproduction by the projector 300 is generated on the acoustic device 400 side, and the projector 300 wirelessly demodulates the video reproduction signal from the acoustic device 400 to perform image formation projection. It can be used for video reproduction in the unit 302. Therefore, video playback based on the video playback signal in the projector 300 can be quickly performed.

  The synchronized playback of video and audio by the projector 300 and the audio device 400 individually connected to the network 110 is not limited to the case of digital stream data transmission from the content transmission device 200, but the DVD player 460 and the digital broadcast reception device 450 can perform content reproduction. In addition to the case where it is a transmission source of digital stream data in place of the transmission device 200, at least when the audio device 400 has selected the content transmission device 200 as the transmission source of digital stream data, the content transmission device with the DVD player 460 as the transmission source When 200 is selected, the same processing is executed when the content transmission apparatus 200 is selected with the digital broadcast receiving apparatus 450 as a transmission source. The case where the projector 300 and the audio device 400 receive different digital stream data will be described later. When the digital broadcast receiving device 450 is the transmission source of the digital stream data, the projector 300 and the acoustic device 400 each have a data decoder included in the digital stream data transmitted by the digital broadcast receiving device 450. What is necessary is just to comprise so that the decoder of the digital audio | voice signal and video signal according to an encoding standard can be performed.

  In the video / audio reproduction system 100 of the above-described embodiment, since the projector 300 and the audio device 400 can individually input digital stream data via the network 110, video reproduction and audio reproduction are performed using individual data. It may be done. For example, the projector 300 inputs digital stream data including only a video signal and reproduces video by the projector alone, and the acoustic device 400 inputs digital stream data including only an audio signal, or digital stream data different from the projector 300 May be input and the sound unrelated to the image on the projector 300 may be reproduced as background music. In this way, the video reproduction by the projector 300 alone can be handled as follows.

  The control unit 318 of the projector 300 compares the video playback signal generated from the video signal in the digital stream data input by the projector 300 with the video playback signal that is wirelessly transmitted from the audio device 400. Based on this comparison result, it can be determined that separate digital stream data is input to the projector 300 and the audio apparatus 400 and that video reproduction or audio reproduction is performed by each apparatus alone. Therefore, in this case, in the projector 300, based on the control of the control unit 318, the video playback signal generated through the code with the video signal in the data decoder 312 is output from the video playback unit 314 to the image forming projection unit 302. Thus, video reproduction is performed separately from audio reproduction by the audio device 400. On the other hand, in the audio apparatus 400, the audio reproduction signal generated as described above by the data decoder 412 or the like is output to the speaker 402, and the audio reproduction is performed separately from the video reproduction by the projector 300. In this case, the acoustic device 400 receives the comparison result from the projector 300 side as a wireless signal, and when video playback and audio playback are performed separately, the video signal is decoded by the data decoder 412 or the like. It is also possible not to generate and transmit the reproduction signal.

  Next, a modified example will be described. This modification is characterized in that the projector 300 has a video / audio playback function capable of executing audio playback in addition to video playback. FIG. 3 is a block diagram schematically showing a configuration of a video / audio reproduction system 100 according to a modification. As shown in the drawing, in the video / audio reproduction system 100 according to the modification, the projector 300 includes an internal speaker 330 and an audio modulator 332 and an audio delay 334 so that audio can be reproduced by the speaker. In this modification, the data decoder 312 decodes the video signal included in the digital stream data (MPEG2 data) received from the network 110 via the network driver 310 and the audio signal included in the digital stream data. Also decode. Then, the video player 314 converts the decoded audio signal data into an audio reproduction signal suitable for audio reproduction by the built-in speaker 330 together with the synchronization signal included in the digital stream data, and outputs the audio reproduction signal to the audio delay unit 334. The audio delay unit 334 determines a delay time that matches the synchronization signal, delays the delay time and outputs the decoded audio signal data to the audio modulator 332, and the audio modulator 332 converts the decoded audio signal data to analog The sound is reproduced from the built-in speaker 330 after modulation.

  In the projector 300, the control unit 318 included in the projector 300 determines the priority order of sound reproduction from the built-in speaker 330 included in the projector 300 and sound reproduction from the speaker 402 included in the acoustic device 400. For example, when the user operates the remote controller VR of the projector 300 to instruct to mute or stop the sound reproduction in the projector 300, or the sound reproduction instruction on the side of the acoustic device 400 with a sound reproduction selection switch (not shown). In some cases, the user desires to reproduce sound from the speaker 402 of the acoustic device 400, and the sound reproduction from the speaker 402 has priority. Therefore, in such a case, the control unit 318 outputs a signal to that effect to the data decoder 312, the video player 314, and the wireless transceiver 316.

  Hereinafter, a description will be given in accordance with determination of the priority order of audio reproduction by the control unit 318 in the projector 300. When the control unit 318 gives priority to the sound reproduction by the speaker 402 of the audio device 400 as described above, the data decoder 312, the video reproduction unit 314, and the wireless transmission / reception device 316 that have received a signal to that effect from the control unit 318 The operation is the same as the embodiment described above. That is, in this case, since the audio reproduction of the audio device 400 is prioritized, the video generated and transmitted as described above on the audio device 400 side in order to achieve video reproduction synchronized with the reproduction audio. Video reproduction is performed by the image forming projection unit 302 using the reproduction signal. Therefore, in this case, the video player 314 and the data decoder 312 are controlled by the control unit 318 to decode or convert the audio signal / video signal into a signal for reproduction or the image forming / projecting unit 302 or the built-in speaker 330. The video playback unit 314 receives the video playback signal generated and transmitted by the audio device 400 via the wireless transceiver 316, and transmits the video playback signal to the image forming projection unit 302. Video transmission is performed in the image forming projection unit 302 by transmission. In this case, the video reproduction by the image forming projection unit 302 is performed in synchronization with the audio reproduction by the speaker 402 of the acoustic device 400 as described above.

  On the other hand, when the control unit 318 gives priority to audio reproduction using the built-in speaker 330 included in the projector 300, the data decoder 312 and the video player 314 receive audio signals included in the digital stream data under the control of the control unit 318. The audio reproduction signal including the synchronization signal to the audio delay unit 334 is output while the audio signal and the video signal are generated and the audio / video reproduction signal is generated. Output playback signal. In addition, the wireless transceiver 316 receives the control of the control unit 318, stops the reception and demodulation of the wireless signal from the audio device 400 side, and reproduces video from the audio device 400 side to the video player 314. Stop signal output. Then, since there is no video playback signal input from the wireless transmitter / receiver 316 to the video player 314, the video playback signal that has undergone data decoding and video playback signal conversion by the data decoder 312 and the video player 314 is: The images are sequentially output to the liquid crystal display unit 303 of the image forming and projecting unit 302 via the image reproducing unit 314, and the image forming and projecting unit 302 reproduces the image. The audio modulator 332 reproduces the sound from the built-in speaker 330 in synchronization with the video reproduction of the image forming projection unit 302 by the signal output having the delay time determined by the audio delay unit 334.

  Therefore, according to the modification described with reference to FIG. 3, in addition to being able to achieve synchronization when the projector 300 and the audio device 400 separately perform video playback / audio playback, an image using only the projector 300 can be obtained. Since the video reproduction by the forming projection unit 302 and the audio reproduction by the built-in speaker 330 can be executed in synchronization with each other, the product value as a single projector 300 is increased.

  Moreover, this modification can also be realized in the following manner. In the case where the priority of audio reproduction is audio from the speaker 402 of the audio device 400, the audio device 400 uses the projector 300 in the audio device 400 based on the video reproduction signal comparison results described above by the control unit 318 of the projector 300. It can be determined that audio reproduction based on data different from the digital stream data that is the source of the video is being executed. In such a case, the decoded audio signal output from the data decoder 312 to the audio delay unit 334 and the decoded video signal from the data decoder 312 to the video player 314 are given even if audio reproduction priority is given to the speaker 402 of the audio device 400. By performing the output, it is possible to synchronize and execute the video reproduction by the image forming projection unit 302 and the audio reproduction by the built-in speaker 330 using only the projector 300.

  Further, from the comparison result of the video reproduction signal as described above by the control unit 318 of the projector 300, the projector 300 and the audio device 400 respectively perform video reproduction and audio reproduction based on the same digital stream data. If it is determined that the sound reproduction by the speaker 402 of the acoustic device 400 is prioritized, priority can be given. If the two video playback signals do not match, for example, the user listens to the sound 402 unrelated to the video from the speaker 402 of the audio device 400 while the projector 300 performs synchronized video playback. It can be said that he wants sound reproduction. In this case, since sound reproduction based on different digital stream data is executed by the projector 300 and the sound device 400, the sound device 400 side performs sound reproduction based on the received digital stream data. On the other hand, on the projector 300 side, video playback and audio playback based on the received digital stream data can be executed in synchronization. In this way, while listening to audio unrelated to the video from the speaker 402 of the audio device 400, the projector 300 can cope with the user's request to enjoy synchronized video playback and audio playback, increasing the product value.

  The present invention is not limited to the above-described embodiments and modifications, and can be implemented in various modes without departing from the scope of the invention. For example, in acquiring the video reproduction signal generated and transmitted on the acoustic device 400 side on the projector 300 side, in the above embodiment, wireless transmission by the wireless transceiver 414 of the acoustic device 400 and the wireless transceiver 316 of the projector 300 is performed. However, it can also be configured as follows. That is, the acoustic device 400 and the projector 300 are provided with a transmission / reception device that performs modulation and combination of signals in accordance with, for example, a data transmission standard using laser light, and irradiation and reception of laser light. It is also possible for the projector 300 to acquire a video playback signal generated for video playback at the forming projection unit 302. If laser light is used, the bandwidth of information propagation is widened, so high-quality video such as high-definition video can be reproduced without causing video degradation while synchronizing with audio as described above.

  In addition, a projector is used as an example of a video reproducing device, and the image forming and projecting unit 302 includes a liquid crystal display unit 303. Instead of the liquid crystal display unit, DMD (Digital Micromirror Device; DMD is Texas Instruments, USA). (Trademark). Moreover, not only a projector but various video reproduction apparatuses, such as a liquid crystal display and a plasma display, can be applied. The network 110 can be applied regardless of wired or wireless. Further, the sound device 400 generates and transmits a signal used for video reproduction in the image forming and projection unit 302 of the projector 300, but conversely, on the projector 300 side, the sound 402 is connected to the speaker 402 of the sound device 400. It is also possible to generate and transmit a signal used for audio reproduction.

1 is a block diagram schematically showing a configuration of a video / audio reproduction system 100 as an embodiment of the present invention. FIG. FIG. 6 is an explanatory diagram showing video playback / audio playback when digital stream data is input from the content transmission device 200 via the network 110. It is a block diagram which shows roughly the structure of the video / audio reproduction system 100 of the modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Video / audio reproduction system 110 ... Network 200 ... Content transmission apparatus 202 ... Hard disk (built-in)
204 ... Hard disk (external)
206 ... Content transmission control unit 208 ... Network driver 300 ... Projector 302 ... Image forming projection unit 303 ... Liquid crystal display unit 304 ... Lens 310 ... Network driver 312 ... Data Decoder 314 ... Video player 315 ... Antenna 316 ... Wireless transceiver 318 ... Control unit 320 ... Remote signal receiver 321 ... Hard disk 330 ... Built-in speaker 332 ... Audio Modulator 334 ... Audio delay device 400 ... Acoustic device 402 ... Speaker 410 ... Network driver 412 ... Data decoder 413 ... Audio conversion / amplifier 414 ... Wireless transceiver 416 .. Antenna 418 Control unit 420 Remote signal receiver 421 Hard disk 450 Digital broadcast receiver 460 DVD player 470 CD player MR Remote controller Roller VR ... remote controller S ... screen

Claims (9)

A video playback device having a video playback device, an audio playback device having an audio playback device, and a content transmission device that is a transmission source of video and audio content including a synchronized video signal and audio signal are connected to a network. And a video / audio reproduction system for transmitting the video / audio content from the content transmission device to the video reproduction device and the audio reproduction device via the network,
The audio playback device and the video playback device are:
Each is equipped with a transmitter / receiver capable of mutual communication of data,
One of the audio playback device and the video playback device is:
When the input of the video / audio content is received from the content transmission apparatus via the network, the audio signal included in the input video / audio content is processed for audio reproduction by the audio reproduction device. Generating an audio playback signal suitable for audio playback on the audio playback device, and processing the video signal included in the received video and audio content for video playback on the video playback device. A playback signal generation unit for generating a video playback signal suitable for video playback on the video playback device;
One playback device of the video playback device or the audio playback device of the one playback device has one playback signal for playback of the audio playback signal or one of the video playback signals for playback on the one playback device. Is output together with establishment of a predetermined condition, and a playback unit that plays back video or audio based on the one playback signal on the one playback device;
The audio playback signal or video for playback on the other playback device of the audio playback device or the other playback device of the audio playback device is connected to the other playback device of the audio playback device and the video playback device. A transmission unit that transmits the other reproduction signal of the reproduction signal and the synchronization signal for synchronization included in the input video and audio content via the transmission / reception unit;
The other playback device is
When the transmission / reception unit of the other reproduction device receives the other reproduction signal and the synchronization signal transmitted by the transmission unit of the one reproduction device via the transmission / reception unit, the reception of the signal is notified. A reception signal transmission unit that transmits a reception signal indicating to the transmission / reception unit of the one playback device via the transmission / reception unit;
The other reproduction signal received from the one reproduction device is output to the other reproduction device of the other reproduction device based on the synchronization signal, and the other reproduction device is reproduced by the other reproduction device. And a playback unit for playing back video or audio based on the signal for use,
The playback unit of the one playback device is:
When the reception signal transmitted via the transmission / reception unit is received by the transmission unit of the other reproduction device, the one reproduction signal is output to the one reproduction device, assuming that the predetermined condition is satisfied. A video / audio playback system that plays back video or audio based on one playback signal. The video / audio reproduction system according to claim 1,
The one playback device is the audio playback device. The video / audio reproduction system according to claim 1 or 2,
Each of the audio playback device and the video playback device is:
A playback adjustment unit operated by a user to adjust the playback status of video or audio on the playback device of each playback device;
When the user's playback adjustment by the playback adjustment unit is a playback adjustment related to the synchronized playback of video and audio, a playback adjustment control signal indicating the state of the playback adjustment is generated, and the playback adjustment via the transmission / reception unit A reproduction adjustment signal transmission unit that transmits a control signal to the transmission unit of the other reproduction device;
A first reproduction adjustment execution unit that performs reproduction adjustment of video or audio on the reproduction device in response to a user's reproduction adjustment operation by the reproduction adjustment unit;
When the reproduction adjustment control signal is received from the reproduction adjustment signal transmission unit included in the other reproduction device via the transmission / reception unit, second reproduction adjustment is performed for the synchronized reproduction suitable for the received reproduction adjustment control signal. A video / audio playback system comprising a playback adjustment execution unit. The video / audio reproduction system according to claim 3,
The reproduction adjustment signal transmitter is
When any one of playback stop including pause and playback adjustment including at least one of rewind or fast forward is made by the user's operation of the playback adjustment unit, the playback adjustment related to the synchronous playback A video / audio reproduction system for transmitting a reproduction adjustment control signal to the transmission unit of the other reproduction apparatus. The video / audio reproduction system according to any one of claims 2 to 4,
The other playback device is the video playback device, and the video playback device
An audio playback device associated with the video playback device;
The audio signal included in the video / audio content received via the network is processed for audio reproduction by the apparatus-associated audio reproduction device and adapted for audio reproduction by the apparatus-associated audio reproduction device Generating the reproduced audio signal and processing the video signal included in the received video / audio content for the video reproduction on the video reproduction device to reproduce the video on the video reproduction device. An adapted video reproduction signal is generated, audio reproduction on the apparatus-associated audio reproduction device by the generated audio reproduction signal, and video reproduction on the video reproduction device by the generated video reproduction signal, An in-video playback device synchronization unit that executes synchronously based on the synchronization signal included in the video and audio content;
The audio reproduction device included in the audio reproduction device is configured to determine a priority order of audio reproduction in the audio reproduction device included in the audio reproduction device and audio reproduction in the audio reproduction device associated with the device based on a predetermined order defining condition. A video / audio reproduction system comprising: an in-video reproduction apparatus synchronization stop unit that stops the operation of the in-video reproduction apparatus synchronization unit when priority is given to audio reproduction in the video reproduction apparatus. The video / audio reproduction system according to claim 5,
The video playback device synchronization stop unit is
When the same video / audio content from the content transmission device is transmitted to both the video reproduction device and the audio reproduction device and the audio reproduction is being performed by the audio reproduction device, and the audio reproduction accompanying the device A video / audio playback system that prioritizes audio playback on the audio playback device of the audio playback device, assuming that the ranking regulation condition is satisfied, at least when a user operation to stop audio playback on the device is performed . A video playback device that is connected to a network and is capable of receiving a signal via the network and that plays back a video composed of an input video signal on a video playback device,
A process of inputting a video / audio content including the video signal and the audio signal in synchronization with each other via the network and converting the audio signal included in the video / audio content into an audio reproduction signal suitable for an audio reproduction device. A transmission / reception unit capable of mutual communication of data with an audio reproduction device that generates the audio reproduction signal from the audio signal via,
The video playback signal generated from the video signal through a process in which the audio playback device converts the video signal included in the video / audio content into a video playback signal suitable for the video playback device, and the video / audio content A signal input unit that inputs a synchronization signal for synchronization included in the audio reproduction device from the side of the audio reproduction device;
When the signal input unit inputs the video reproduction signal and the synchronization signal, the audio reproduction apparatus outputs the audio reproduction signal to the audio reproduction device, and the audio reproduction device outputs the reception signal indicating that the signal is received. As a condition for achieving audio reproduction by the audio reproduction signal in a reproduction device, a signal transmission unit that transmits to the audio reproduction device via the transmission / reception unit;
The video reproduction signal received from the audio reproduction device side by the signal input unit is output to the video reproduction device based on the synchronization signal, and based on the video reproduction signal at the video reproduction device A video playback device comprising a playback unit that plays back video. The video playback device according to claim 7,
A playback adjustment unit operated by a user to adjust the playback status of the video on the video playback device;
When the user's playback adjustment by the playback adjustment unit is a playback adjustment related to the synchronized playback of video and audio, a playback adjustment control signal indicating the state of the playback adjustment is generated, and the playback adjustment via the transmission / reception unit A reproduction adjustment signal transmission unit that transmits a control signal to the transmission unit of the other reproduction device;
A first reproduction adjustment execution unit that performs reproduction adjustment of video or audio on the reproduction device in response to a user's reproduction adjustment operation by the reproduction adjustment unit;
When reproduction adjustment related to the synchronous reproduction is performed on the audio reproduction device side and a reproduction adjustment control signal indicating the state of the reproduction adjustment is input from the audio device side via the transmission / reception unit, the input is performed. A video playback device, comprising: a second playback adjustment execution unit that performs playback adjustment for the synchronized playback in accordance with the playback adjustment control signal on the audio playback device side. The video reproduction device according to claim 7 or 8, wherein
An audio playback device associated with the video playback device;
While generating the audio reproduction signal from the audio signal through a process of converting the audio signal included in the video and audio content that has received the input into an audio reproduction signal suitable for the apparatus-associated audio reproduction device, The video playback signal is generated from the video signal through a process of converting the video signal included in the received video / audio content into a video playback signal suitable for the video playback device, and the generated audio is generated. The audio reproduction on the apparatus-associated audio reproduction device by the reproduction signal and the video reproduction on the video reproduction device by the video reproduction signal are synchronized based on the synchronization signal for synchronization included in the video / audio content. A synchronizer within the video playback device to be executed,
The audio reproduction device included in the audio reproduction device is configured to determine a priority order of audio reproduction in the audio reproduction device included in the audio reproduction device and audio reproduction in the audio reproduction device associated with the device based on a predetermined order defining condition. A video playback device comprising: an internal video playback device synchronization stop unit that stops the operation of the internal video playback device synchronization unit when giving priority to audio playback in the video playback device.

Images