Non real-time delivery of MPEG-2 programs via an MPEG-2 transport stream
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United States of America Patent
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Aug 3, 2004
Grant Date -
N/A
app pub date -
Oct 11, 2000
filing date -
Dec 9, 1999
priority date (Note) -
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Abstract
Digital content is extracted from single and multiple-program transport streams for subsequent non-real-time (background) transmission in a bandwidth-efficient manner. At an encoder, several null and/or nonessential (N/N) packets (e.g., packets of unused programs) in a transport stream are replaced by an annotation packet (AP) to obtain non-real-time packets. The non-real time packets are inserted into null packet locations (NU) of a real time transport stream. At a decoder, the annotation packets are used to regenerate a specified number of null packets to maintain the original separation of packets of the non-real time data (for timing purposes), allowing existing hardware and/or software to decode the selected program.
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