Identification of a data stream transmitted as a sequence of...

Details Identification of a data stream transmitted as a sequence of... Identification of a data stream transmitted as a sequence of...

H - Electricity

04

L

H04L 12/56 (2006.01) H04N 7/08 (2006.01) H04Q 11/04 (2006.01) H04N 7/60 (2006.01)

Patent

CA 2114182

The contents of a digital data file, interspersed as packets of data in a bit stream containing entertainment signals and/or other data files, are quickly identified without a high system overhead for identification of each packet. The data file is divided into packets, and sequential groups of packets making up the file are identified as segments. The first packet of each segment has a prefix containing a service identification number, a block number, a segment number, and possibly segment length information, followed by data contents. The following packets of the segment have only the service identification number and block number, followed by the data contents. Where the file data are transmitted repeatedly, often without change in many segments, receiver processing time or power can be greatly reduced by including a version number or toggle bit in the segment prefix, so that a receiver can ignore the unchanged data.

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