TV telephone system
AssigneeNEC Corporation
InventorTatsuya Kato
Life of this patent
Estimating the term…
Abstract
In a TV telephone system, a video compression section performs interframe predictive encoding of a video signal captured by a video camera, so as to generate INTRA video data and INTER video data. In the case in which the video compression section generates INTRA video data, the INTRA video data is performed TCP protocol processing by a TCP section, and in the case in which the video compression section generates INTER video data, the INTER is performed UDP protocol processing by a UDP section. The result is that communication of INTRA video data is performed using the TCP protocol and communication of INTER video data is performed using the UDP protocol.
Claims6
A TV telephone system in which encoding processing is preformed on an audio signal so as to generate compressed audio data, and interframe predictive encoding processing is preformed on a video signal, so as to generate INTRA (intraframe coding) video data not including interframe predictive coding signal and INTER (interframe coding) video data including interframe predictive coding signal, said system having a plurality of TV telephone apparatuses which perform communication with each other, via an IP (internet protocol) network, using said compressed audio data, INTRA video data and INTER video data, wherein said plurality of TV telephone apparatuses of said TV telephone system perform INTRA video data communication using the transfer control protocol (TCP), wherein each of said TV telephone apparatuses comprises:
- a microphone for capturing said audio signal;
- an audio signal compression section which generates said compressed audio data by performing audio compression and encoding of said audio signal captured by said microphone;
- a video camera for capturing a video signal;
- a video signal compression section which generates both said INTRA video data and said INTER video data by performing interframe predictive encoding for each frame of said video signal captured by said video camera;
- a UDP (user datagram protocol) section which performs UDP protocol processing of said compressed audio data output from said audio signal compression section, and which performs UDP protocol processing of INTER video data output from said video signal compression section, and which performs UDP protocol processing of a compressed audio data and INTER video data received via said IP network;
- a TCP (transmission control protocol) section which performs TCP protocol processing of said INTRA video data output from said video signal compression section, and which performs TCP protocol processing of an INTRA video data received via said IP network;
- an IP section which performs IP protocol processing of said compressed audio data and said INTER video data output from said UDP section and said INTRA video data output from said TCP section, and which performs IP protocol processing of said compressed audio data, said INTRA video data, and said INTER video data received via said IP network and output said compressed audio data and said INTER video data received via said IP network to said UDP section and output said INTRA video data received via said IP network to said TCP section;
- and
- a video decompression section which performs decompression and decoding of said INTER video data output from said UDP section and said INTRA video data output from said TCP section.
A TV telephone apparatus in which encoding processing is preformed on an audio signal so as to generate compressed audio data, and interframe predictive encoding processing is preformed on a video signal, so as to generate INTRA (intraframe coding) video data not including interframe predictive coding signal and INTER (interframe coding) video data including interframe predictive coding signal, wherein said TV telephone apparatus comprises:
- a microphone for capturing said audio signal;
- an audio signal compression section which generates said compressed audio data by performing audio compression and encoding of said audio signal captured by said microphone;
- a video camera for capturing a video signal;
- a video signal compression section which generates both said INTRA video data and said INTER video data by performing interframe predictive encoding for each frame of said video signal captured by said video camera;
- a UDP (user datagram protocol) section which performs UDP protocol processing of said compressed audio data output from said audio signal compression section, and which performs UDP protocol processing of INTER video data output from said video signal compression section, and which performs UDP protocol processing of a compressed audio data and INTER video data received via an IP network;
- a TCP (transmission control protocol) section which performs TCP protocol processing of said INTRA video data output from said video signal compression section, and which performs TCP protocol processing of an INTRA video data received via said IP network;
- an IP section which performs IP protocol processing of said compressed audio data and said INTER video data output from said UDP section and said INTRA video data output from said TCP section, and which performs IP protocol processing of said compressed audio data, said INTRA video data, and said INTER video data received via said IP network and output said compressed audio data and said INTER video data received via said IP network to said UDP section and output said INTRA video data received via said IP network to said TCP section;
- and
- a video decompression section which performs decompression and decoding of said INTER video data output from said UDP section and said INTRA video data output from said TCP section.
Dependencies are inferred from the claim text.