AUDIO-VIDEO OUTPUT DEVICE, AUDIO OUTPUT DEVICE, AUDIO-VIDEO REPRODUCTION DEVICE, AUDIO-VIDEO DATA REPRODUCTION SYSTEM, AND AUDIO-VIDEO DATA REPRODUCTION METHOD
First Claim
1. An audio-video output device connected, via a network, to an audio-video reproduction device which reproduces audio data and video data, and to an audio output device capable of outputting the audio data reproduced by the audio-video reproduction device, said audio-video output device being capable of outputting the audio data and the video data reproduced by the audio-video reproduction device,wherein, in the network:
- (i) the audio data and the video data are unidirectionally transmitted from any given data transmission device to any given data reception device;
(ii) a control message is bidirectionally transmitted between all of the devices; and
(iii) a connection between the devices for transmitting and receiving the audio data and the video data becomes valid when unidirectional transmission of audio reproduction capability information of the data reception device from the data reception device to the data transmission device becomes available,said audio-video output device comprises;
an audio reproduction capability inquiry unit configured to inquire, from the audio output device, audio reproduction capability information of the audio output device, and to acquire the audio reproduction capability information; and
a control message transmission unit configured to transmit, to the audio-video reproduction device, the control message including the audio reproduction capability information of the audio output device and information setting whether audio reproduction capability indicated by the audio reproduction capability information is used or not,in the case where, (i) in the network, the audio-video reproduction device and said audio-video output device are connected in such a manner that the audio data and the video data are unidirectionally transmitted from the audio-video reproduction device to said audio-video output device, and where (ii) said audio-video output device and the audio output device are connected in such a manner that the audio data is output from said audio-video output device to the audio output device through a network different from the network,said control message transmission unit is configured to prohibit re-transmitting the audio reproduction capability information to the audio-video reproduction device using unidirectional transmission when transmitting the control message.
1 Assignment
0 Petitions
Accused Products
Abstract
In the case where (i) audio-video data is unidirectionally transmitted between any device, where (ii) control messages are bidirectionally transmitted between all of the devices, and where (iii) a connection between the devices for transmitting and receiving the audio-video data becomes valid when unidirectional transmission of audio reproduction capability information of the reception device from the data reception device to the data transmission device becomes available, the TV (31) includes the audio reproduction capability information of the AV amplifier (21) to the control message and transmits the control message to the DVD recorder (10) (30M3), and in the case where the DVD recorder (10) and the TV (31) are connected such that the audio-video data is unidirectionally transmitted from the DVD recorder (10) to the TV (31), and where the TV (31) and the AV amplifier (21) are connected such that the audio data is output from the TV (31) to the AV amplifier (21) through another network, the TV (31) does not re-transmit the audio reproduction capability information to the DVD recorder (10) using the unidirectional transmission when transmitting the control message.
14 Citations
6 Claims
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1. An audio-video output device connected, via a network, to an audio-video reproduction device which reproduces audio data and video data, and to an audio output device capable of outputting the audio data reproduced by the audio-video reproduction device, said audio-video output device being capable of outputting the audio data and the video data reproduced by the audio-video reproduction device,
wherein, in the network: -
(i) the audio data and the video data are unidirectionally transmitted from any given data transmission device to any given data reception device; (ii) a control message is bidirectionally transmitted between all of the devices; and (iii) a connection between the devices for transmitting and receiving the audio data and the video data becomes valid when unidirectional transmission of audio reproduction capability information of the data reception device from the data reception device to the data transmission device becomes available, said audio-video output device comprises; an audio reproduction capability inquiry unit configured to inquire, from the audio output device, audio reproduction capability information of the audio output device, and to acquire the audio reproduction capability information; and a control message transmission unit configured to transmit, to the audio-video reproduction device, the control message including the audio reproduction capability information of the audio output device and information setting whether audio reproduction capability indicated by the audio reproduction capability information is used or not, in the case where, (i) in the network, the audio-video reproduction device and said audio-video output device are connected in such a manner that the audio data and the video data are unidirectionally transmitted from the audio-video reproduction device to said audio-video output device, and where (ii) said audio-video output device and the audio output device are connected in such a manner that the audio data is output from said audio-video output device to the audio output device through a network different from the network, said control message transmission unit is configured to prohibit re-transmitting the audio reproduction capability information to the audio-video reproduction device using unidirectional transmission when transmitting the control message. - View Dependent Claims (2)
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3. An audio output device connected, via a network, to an audio-video reproduction device which reproduces audio data and video data, and to an audio-video output device capable of outputting the audio data and the video data reproduced by the audio-video reproduction device, said audio output device being capable of outputting the audio data reproduced by the audio-video reproduction device,
wherein, in the network: -
(i) the audio data and the video data are unidirectionally transmitted from any given data transmission device to any given data reception device; (ii) a control message is bidirectionally transmitted between all of the devices; and (iii) a connection between the devices for transmitting and receiving the audio data and the video data becomes valid when unidirectional transmission of audio reproduction capability information of the data reception device from the data reception device to the data transmission device becomes available, said audio output device comprises; a control message transmission unit configured to include, to the control message, the audio reproduction capability information of said audio output device and information indicating whether the audio reproduction capability information by a unidirectional transmission is switched or not, and to transmit the information to the audio-video output device; and a control message reception unit configured to receive, from the audio-video output device, the control message including the information setting whether the audio reproduction capability information by the unidirectional transmission is switched or not, and when, in the network, the audio-video reproduction device, said audio output device, and the audio-video output device are connected in such a manner that (i) the audio data and the video data are unidirectionally transmitted from the audio-video reproduction device to the audio output device and that (ii) the audio data and the video data are unidirectionally transmitted from said audio output device to the audio-video output device, said control message reception unit is configured to prohibit re-transmitting the audio reproduction capability information to the audio-video reproduction device using unidirectional transmission, when said control message reception unit receives the control message transmitted from the audio-video output device and indicating that the audio reproduction capability information by the unidirectional transmission is not switched.
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4. An audio-video reproduction device which reproduces audio data and video data, and which is connected, via a network, to an audio-video output device capable of outputting the audio data and the video data reproduced by said audio-video reproduction device, and to an audio output device capable of outputting the audio data reproduced by said audio-video reproduction device,
wherein, in the network: -
(i) the audio data and the video data are unidirectionally transmitted from any given data transmission device to any given data reception device; (ii) a control message is bidirectionally transmitted between all of the devices; and (iii) a connection between the devices for transmitting and receiving the audio data and the video data becomes valid when unidirectional transmission of audio reproduction capability information of the data reception device from the data reception device to the data transmission device becomes available, said audio-video reproduction device comprising; a control message reception unit configured to receive the control message including audio reproduction capability information of the audio output device and information setting whether the audio reproduction capability information is used or not; and a reproduction unit configured to reproduce the audio data and the video data, and said reproduction unit reproduces the audio data in accordance with the audio reproduction capability information included in the control message received from the audio-video output device, when said control message reception unit receives the control message indicating that the audio reproduction capability information is used, instead of the audio reproduction capability information received from the audio output device through the unidirectional transmission.
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5. An audio-video data reproduction system comprising:
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an audio-video reproduction device which reproduces audio data and video data; an audio output device which is capable of outputting the audio data reproduced by said audio-video reproduction device; and an audio-video output device capable of outputting the audio data and the video data reproduced by said audio-video reproduction device, wherein said audio-video reproduction device, said audio output device, and said audio-video output device are connected to one another via a network, in the network; (i) the audio data and the video data are unidirectionally transmitted from any given data transmission device to any given data reception device; (ii) a control message is bidirectionally transmitted between all of the devices; and (iii) a connection between the devices for transmitting and receiving the audio data and the video data becomes valid when unidirectional transmission of audio reproduction capability information of the data reception device from the data reception device to the data transmission device becomes available, said audio-video output device includes; an audio reproduction capability inquiry unit configured to inquire, from said audio output device, audio reproduction capability information of said audio output device and to acquire the audio reproduction capability information; an audio-video output device side control message transmission unit configured to include, to the control message, the audio reproduction capability information of said audio output device and information setting whether audio reproduction capability indicated by the audio reproduction capability information is used or not, and to transmit the control message to said audio-video reproduction device, and said audio-video output device side control message transmission unit is further configured to include, to the control message, information setting whether the audio reproduction capability information using unidirectional transmission is switched or not, and to transmit the control message to said audio output device, said audio output device includes; an audio output device side control message transmission unit configured to include, to the control message, the audio reproduction capability information of said audio output device and information indicating whether the audio reproduction capability information by the unidirectional transmission is switched or not, and to transmit the control message to said audio-video output device; and an audio output device side control message reception unit configured to receive the control message including the information setting whether the audio reproduction capability information by the unidirectional transmission is switched or not, and said audio-video reproduction device includes; an audio-video reproduction device side control message reception unit configured to receive the control message including the audio reproduction capability information of said audio output device and the information setting whether the audio reproduction capability information is used or not; and a reproduction unit configured to reproduce the audio data and the video data, when, in the network, said audio-video reproduction device, said audio output device, and said audio-video output device are connected in such a manner that (i) the audio data and the video data are unidirectionally transmitted from said audio-video reproduction device to said audio output device, and that (ii) the audio data and the video data are unidirectionally transmitted from said audio output device to said audio-video output device, said audio output device prohibits re-transmitting the audio reproduction capability information to said audio-video reproduction device using the unidirectional transmission, when said audio output device side control message reception unit receives the control message transmitted by said audio-video output device side control message transmission unit, indicating that the audio reproduction capability information by the unidirectional transmission is not switched, in the case where, (i) in the network, said audio-video reproduction device and said audio-video output device are connected in such a manner that the audio data and the video data are unidirectionally transmitted from said audio-video reproduction device to said audio-video output device, and where (ii) said audio-video output device and said audio output device are connected in such a manner that the audio data is output from said audio-video output device to said audio output device through a network different from the network, said control message transmission unit is configured to prohibit re-transmitting the audio reproduction capability information to the audio-video reproduction device using the unidirectional transmission when transmitting the control message, and said reproduction unit reproduces the audio data in accordance with the audio reproduction capability information included in the control message received from said audio-video output device, when said audio-video reproduction device side control message reception unit receives the control message indicating that the audio reproduction capability information is used, instead of the audio reproduction capability information received from said audio-video output device through the unidirectional transmission.
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6. An audio-video data reproduction method in an audio-video data reproduction system including:
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an audio-video reproduction device which reproduces audio data and video data; an audio output device which is capable of outputting the audio data reproduced by the audio-video reproduction device; and an audio-video output device capable of outputting the audio data and the video data reproduced by the audio-video reproduction device, wherein the audio-video reproduction device, the audio output device, and the audio-video output device are connected one another via a network, wherein, in the network; (i) the audio data and the video data are unidirectionally transmitted from any given data transmission device to any given data reception device; (ii) a control message is bidirectionally transmitted between all of the devices; and (iii) a connection between the devices for transmitting and receiving the audio data and the video data becomes valid when unidirectional transmission of audio reproduction capability information of the data reception device from the data reception device to the data transmission device becomes available, said audio-video data reproduction method comprises; inquiring, from the audio output device, audio reproduction capability information of the audio output device and acquiring the audio reproduction capability information; including, to the control message, the audio reproduction capability information of the audio output device and information setting whether audio reproduction capability indicated by the audio reproduction capability information is used or not, and transmitting the control message to the audio-video reproduction device; and including, to the control message, information setting whether or not the audio output device switches, to the audio-video reproduction device, the audio reproduction capability information by a unidirectional transmission, and transmitting the control message to the audio output device, in the network, when the audio-video reproduction device, the audio output device, and the audio-video output device are connected in such a manner that (i) the audio data and the video data is unidirectionally transmitted from the audio-video reproduction device to the audio output device and that (ii) the audio data and the video data is unidirectionally transmitted from the audio output device to the audio-video output device, said audio-video data reproduction method further comprises prohibiting the audio output device from re-transmitting the audio reproduction capability information to the audio-video reproduction device using unidirectional transmission, when the audio output device receives the control message transmitted by the audio-video output device side control message transmission unit, indicating that the audio reproduction capability information by the unidirectional transmission is not switched, in the case where, (i) in the network, the audio-video reproduction device and the audio-video output device are connected in such a manner that the audio data and the video data are unidirectionally transmitted from the audio-video reproduction device to the audio-video output device, and where (ii) the audio-video output device and the audio output device are connected in such a manner that the audio data is output from the audio-video output device to the audio output device through a network different from the network, and said audio-video data reproduction method further comprises; prohibiting the audio-video output device from re-transmitting the audio reproduction capability information to the audio-video reproduction device using unidirectional transmission when transmitting the control message; and reproducing the audio data in accordance with the audio reproduction capability information included in the control message received from the audio-video output device, when the audio-video reproduction device receives the control message indicating that the audio reproduction capability information is used.
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Specification