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 Title: |
US5598415:
Transmission of high rate isochronous data in MPEG-2 data streams
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Nuber, Ray; La Jolla, CA
Moroney, Paul; Olivenhain, CA
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| Assignee: |
General Instrument Corporation of Delaware, Chicago, IL
other patents from GENERAL INSTRUMENT CORPORATION (218915) (approx. 785)
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| Published / Filed: |
1997-01-28
/ 1995-08-04
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| Application Number: |
US1995000511266
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| IPC Code: |
Advanced:
H04L 29/06;
H04N 7/52;
H04N 7/54;
H04N 7/56;
H04N 7/60;
H04N 7/62;
H04N 7/68;
Core:
H04N 7/64;
more...
IPC-7:
H04J 3/00;
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| ECLA Code: |
H04L29/06M8; H04L29/06; H04N7/52; H04N7/52D; H04N7/54; H04N7/56; H04N7/60; H04N7/62; H04N7/68; T04L29/06C2;
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| U.S. Class: |
Current:
370/474;
348/465;
370/522;
375/E07.267;
375/E07.272;
375/E07.275;
375/E07.276;
375/E07.277;
375/E07.278;
375/E07.281;
Original:
370/474;
370/522;
348/465;
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| Field of Search: |
370/084,118,94.1-94.3,110.1,100.1,105.1,112
348/465,464,467
375/354
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| Priority Number: |
| 1995-08-04 |
US1995000511266 |
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| Abstract: |
A scheme is provided for communicating high rate isochronous data in an MPEG-2 type transport stream in a robust manner. The syntax for the data bitstream also provides for the communication of a data clock increment value to a decoder. The increment value enables a simplified and cost effective approach to the direct digital synthesis of a clock frequency necessary to recover data from the packetized data stream at the decoder. The time resolution for presenting isochronous data presentation units at the decoder is increased by providing a presentation time stamp (PTS) extension to supplement a standard MPEG-2 PTS.
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| Attorney, Agent or Firm: |
Lipsitz, Barry R. ;
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| Primary / Asst. Examiners: |
Olms, Douglas W.; Patel, Ajit
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Parent Case: |
This application is a §111(a) application based on copending U.S. provisional application Ser. No. 60/015,392, filed on Jul. 13, 1995.
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| Designated Country: |
BE CH DE DK ES FR GB IE IT LI NL SE
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| Family: |
Show 27 known family members
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First Claim:
Show all 22 claims |
We claim:
1. A method for the robust transmission of high rate isochronous data in an MPEG-2 type transport stream, comprising the steps of:
- providing said isochronous data in a packetized elementary stream (PES) having a PES header preceding a PES payload, said PES payload including an isochronous data header followed by a plurality of isochronous data presentation units;
- aligning said isochronous data header and the presentation units which follow within said PES such that the first byte of the isochronous data header immediately follows the last byte of the PES header;
- inserting a clock increment value in said isochronous data header specifying the ratio of said isochronous data rate to a reference clock rate, said clock increment value enabling said isochronous data rate to be derived from said reference clock rate at a decoder; and
- packaging said PES into a plurality of isochronous data transport packets such that a first payload byte of each transport packet is the first byte of an isochronous data presentation unit and a last payload byte of each of said packets is the last byte of an isochronous data presentation unit.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
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