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US 6,285,824 B1Granted
Digital signal processor, processing method, digital signal recording/playback device and digital signal playback method
AssigneeSony Corporation
InventorsNaofumi Yanagihara, Teruyoshi Komuro, Hisato Shima
Life of this patent
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Abstract
A MPEG video decoder and MPEG audio decoder respectively decode MPEG video data and MPEG audio data separated by a demultiplexer. A digital interface sends and receives MPEG video data, MPEG audio data and supplementary data between the demultiplexer and external devices. The digital interface detects a flag indicating a discontinuity in a program from an input signal, and a microcomputer performs control so as to initialize the buffer memories.
Claims47
A digital signal processor comprising:
- tuning means for selecting a single transport stream containing a plurality of multiplexed channels from a plurality of transmitted transport streams, each of said multiplexed channels including video data, audio data and supplementary data;
- input means for receiving a transport stream containing video data, audio data and supplementary data from an external device;
- demultiplexing means for selecting one of said multiplexed channels from said plurality of multiplexed channels of said selected single transport stream and separating video data and audio data contained in said selected multiplexed channel or in said transport stream supplied from said external device through said input means by referring to supplementary data;
- decoder means for receiving said separated video data and audio data from said demultiplexing means and decoding said received video and audio data;
- and
- control means for receiving a discontinuity data contained in said supplementary data of said transport stream supplied from said external device through said input means, and initializing said decoder means in response to said discontinuity data.
3 more elements
A digital signal processing method, for use with a digital signal processor, comprising the steps of:
- selecting a single transport stream containing a plurality of multiplexed channels from a plurality of transmitted transport streams, each of said multiplexed channels including video data, audio data and supplementary data;
- receiving a transport stream containing video data, audio data and supplementary data from an external device by an input means;
- selecting one of said multiplexed channels from said plurality of multiplexed channels of said selected single transport stream by a demultiplexing means;
- separating video data and audio data contained in said selected channel or in said transport stream supplied from said external device through said input means by said demultiplexing means by referring to supplementary data;
- supplying said separated video data and audio data from said demultiplexing means into a decoder means;
- decoding said separated video and audio data by said decoding means;
- receiving a discontinuity data contained in said supplementary data of said transport stream supplied from said external device;
- and
- initializing said decoding means in response to said discontinuity data.
6 more elements
A digital signal processor comprising:
- tuning means for selecting a single transport stream containing a plurality of multiplexed channels from a plurality of transmitted transport streams, each of said multiplexed channels including video data, audio data and supplementary data;
- demultiplexing means for selecting one of said multiplexed channels from said plurality of multiplexed channels of said selected single transport stream and separating video data and audio data contained in said selected channel by referring to said supplementary data;
- decoder means for receiving said separated video data and audio data from said demultiplexing means and decoding said received video and audio data;
- and
- output means connected to said demultiplexing means for outputting at least said separated video and audio data to an external device.
2 more elements
A digital signal processing method comprising the steps of:
- selecting a single transport stream containing a plurality of multiplexed channels from a plurality of transmitted transport streams, each of said multiplexed channels including video data, audio data and supplementary data;
- selecting one of said multiplexed channels from said plurality of multiplexed channels of said selected single transport stream by a demultiplexing means;
- separating video data and audio data contained in said selected channel by said demultiplexing means by referring to said supplementary data;
- supplying said separated video data and audio data from said demultiplexing means into a decoder means;
- decoding said separated video and audio data by said decoding means;
- and
- outputting at least said separated video and audio data to an external device.
4 more elements
A digital signal processor comprising:
- a tuner for selecting a single transport stream containing a plurality of multiplexed channels from a plurality of transmitted transport streams, each of said multiplexed channels including video data, audio data and supplementary data;
- an input/output port for receiving a transport stream containing video data, audio data and supplementary data from an external device;
- a demultiplexer for selecting one of said multiplexed channels from said plurality of multiplexed channels of said selected single transport stream and separating video data and audio data contained in said selected multiplexed channel or in said transport stream supplied from said external device through said input/output port by referring to supplementary data;
- a decoder for receiving said separated video data and audio data from said demultiplexer and decoding said received video and audio data;
- and
- a controller for receiving a discontinuity data contained in said supplementary data of said transport stream supplied from said external device through said input/output port, and initializing said decoder in response to said discontinuity data.
3 more elements
A digital signal processor comprising:
- a tuner for selecting a single transport stream containing a plurality of multiplexed channels from a plurality of transmitted transport streams, each of said multiplexed channels including video data, audio data and supplementary data;
- a demultiplexer for selecting one of said multiplexed channels from said plurality of multiplexed channels of said selected single transport stream and separating video data and audio data contained in said selected channel by referring to said supplementary data;
- a decoder for receiving said separated video data and audio data from said demultiplexing means and decoding said received video and audio data;
- and
- an output port connected to said demultiplexer for outputting at least said separated video and audio data to an external device.
2 more elements
Dependencies are inferred from the claim text.