MPEG flow identification for IP networks

Details MPEG flow identification for IP networks MPEG flow identification for IP networks

2007-04-03

2007-04-03

Barot, Bharat (Department: 2155)

Electrical computers and digital processing systems: multicomput

Computer-to-computer protocol implementing

Computer-to-computer data transfer regulating

C709S218000, C709S230000, C709S231000, C370S392000

Reexamination Certificate

active

09608473

ABSTRACT:
The payloads of IP packets are checked to actually determine if a packet contains MPEG-2 video rather than using predefined streams or priority levels that are assumed to contain such information as is done in the prior art. More specifically, the “sync” bytes of the MPEG-2 stream are searched for within the IP packet payload, and when a pattern indicative of the sync bytes is found the sync bytes are identified and the packet is determined to contain MPEG-2 video. The sync byte was defined in MPEG-2 for over-the-air broadcasting in order that a television receiver be able to synchronize the MPEG-2 transport stream packets. Note that the MPEG-2 video, e.g., the MPEG-2 transport stream packets, may or may not be incorporated within real time protocol (RTP) packets before being incorporated into the IP packets.

REFERENCES:
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patent: 0 914 009 (1999-05-01), None
patent: WO 98/02988 (1998-01-01), None
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A. Puri, “Multimedia Systems, Standards, and Networks (chapter 18)”, Mar. 2000, XP-002183848, paragraph IV.A, pp. 501-523.
D. Comer, “Internetworking with TCP/IP vol. 1: Principles, Protocols, and Architecture (chapter 29)”, Feb. 22, 2000, XP-002183849, paragraph 29.7, pp. 539-552.
D. Hoffman, “RTP Payload Format for MPEG2/MPEG2 Video”, Oct. 1, 1996, XP-002144280, pp. 1-11.

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