Efficient transport of program clock reference for audio services delivered on an MPEG-2 transport stream
OwnerMark Kenneth Eyerinventor
Life of this patent
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Abstract
A system and corresponding methods efficiently transport Program Clock Reference (PCR) for audio services delivered on an MPEG-2 Transport Stream (TS) to an audio subsystem. The system processes an original Transport Stream (TS) to remove video packets other than those carrying the Program Clock Reference (PCR) and delivers the packets carrying the Program Clock Reference (PCR) along with audio to a receiving device. The total bandwidth needed to deliver the audio plus the necessary system clock and presentation timing information is therefore reduced.
Claims26
An apparatus, comprising:
- a first circuitry coupled to select from a Transport Stream transport packets identified with a Program Clock Reference Packet Identifier (PCR PID) and that include a Program Clock Reference (PCR) sample in an adaptation field, and to select from the Transport Stream transport packets identified with audio Packet Identifiers;
- and
- a second circuitry coupled to deliver only the selected transport packets to an audio processor.
A method, comprising:
- selecting video packets that include a Program Clock Reference (PCR) and audio transport packets from a Transport Stream;
- and
- delivering only the selected audio transport packets and the selected video transport packets to an audio processor.
A method, comprising:
- selecting from a full Transport Stream packets having an Adaptation Field and a Program Clock Reference (PCR) sample;
- and
- selecting audio packets from the full Transport Stream.
A system, comprising:
- an audio/video processor to generate a first partial Transport Stream and a second partial Transport Stream from a Transport Stream, wherein the first partial Transport Stream includes a set of video packets, and the second partial Transport Stream includes a set of audio packets and a set of video transport packets having an Adaptation Field and a Program Clock Reference (PCR) sample.
A machine-readable medium, comprising:
- machine-readable instructions stored thereon to instruct a processor to select from a full Transport Stream video packets that include a Program Clock Reference (PCR) sample and audio transport packets;
- and
- machine-readable instructions stored thereon to instruct a processor to deliver only the selected audio transport packets and the selected video transport packets to an audio processor.
A machine-readable medium, comprising:
- machine-readable instructions stored thereon to instruct a processor to select from a full Transport Stream packets having an Adaptation Field and a Program Clock Reference (PCR) sample;
- and
- machine-readable instructions stored thereon to instruct a processor to select audio packets from the full Transport Stream.
Dependencies are inferred from the claim text.