Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Patent
1997-09-26
2000-09-05
Kelley, Chris S.
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
370392, 370473, 370394, 370474, 370516, 370517, 375357, 375376, H04N 700
Patent
active
061154229
ABSTRACT:
A method of implementing a time base change to a time-division multiplexec bitstream, for example an MPEG-2-compatible bitstream. The time base change is in response to a Time Base Change Flag. The bitstreams have video and audio packetized elementary streams, and each of these streams has a common time base. Each of the packetized elementary streams has a packet header, and packet data. The packet headers of the packetized elementary streams each contain a Presentation Time Stamp/Decoding Time Stamp flag field, a Presentation Time Stamp field, and a Decoding Time Stamp field. A time base change is indicated by a change in the PCR. The first step in changing the Time Base is receiving a discontinuity in the bitstream. This is used to disable synchronization of the video and audio bitstreams, and to mark a data byte in the bitstream associated with the Time Base Change Flag. The time base change is carried out and an interrupt is issued when the marked data byte arrives for decoding. This interrupt re-enables synchronization of the audio and video bitstreams.
REFERENCES:
patent: 5151904 (1992-09-01), Reiner et al.
patent: 5365272 (1994-11-01), Siracusa
patent: 5381181 (1995-01-01), Deiss
patent: 5425101 (1995-06-01), Woo et al.
patent: 5471511 (1995-11-01), DeLanghe et al.
patent: 5502493 (1996-03-01), Meyer
patent: 5506904 (1996-04-01), Sheldrick et al.
patent: 5517250 (1996-05-01), Hoogenboom et al.
patent: 5521922 (1996-05-01), Fujinami et al.
patent: 5559999 (1996-09-01), Maturi et al.
patent: 5566089 (1996-10-01), Hoogenboom
patent: 5594492 (1997-01-01), O'Callaghan et al.
patent: 5594660 (1997-01-01), Sung et al.
patent: 5596581 (1997-01-01), Saeijs et al.
patent: 5612981 (1997-03-01), Huizer
patent: 5619501 (1997-04-01), Tamer et al.
patent: 5751721 (1998-05-01), Bloks
patent: 5818539 (1998-10-01), Naimpally et al.
patent: 5859660 (1999-01-01), Perkins et al.
patent: 5905732 (1999-05-01), Fimoff et al.
IBM TDB vol. 39, No. 4, Apr. 1996 "Design Architecture for MPEG2 Transport Demultiplexor Assist" by Abdulhafiz et al.
"Digital Video: An Introduction to MPEG-2" by Haskell et al. Copyright 1997 by Chapman & Hall.
"MPEG Video Compression Standard" edited by Mitchell, et al. Copyright 1997 by Chapman and Hall.
"Digital Consumer Electronics Handbook" by Jurgen Copyright 1997 McGraw-Hill.
ISO/IEC 13818-1 "Information Technology--Generic Coding of Moving Pictures and Associated Audio: Systems" NO801 Nov. 13, 1994.
Anderson Richard Eugene
Foster Eric Michael
An Shawn S.
International Business Machines - Corporation
Kelley Chris S.
Steinberg, Esq. William H.
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