System for detecting start codes in MPEG video streams and...

Details System for detecting start codes in MPEG video streams and... System for detecting start codes in MPEG video streams and...

2005-11-08

2005-11-08

Lee, Young (Department: 2613)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

Reexamination Certificate

active

06963612

ABSTRACT:
An exemplary MPEG decoder is capable of decoding received bitstreams and generating PES packets. The MPEG decoder includes a controller that detects start codes in the received bitstreams, each of such codes having a three-byte start code prefix and a one-byte start code value. The controller is operable to (i) fetch a thirty-two bit word of a received bitstream, (ii) determine whether a start code prefix and a start code value are properly aligned within the thirty-two bit word, and (iii) if not properly aligned within the thirty-two bit word, determine that the thirty-two bit word does not contain any portion of the start code prefix based solely on a determination that a least significant byte of the thirty-two bit word is not part of the start code prefix.

REFERENCES:
patent: 5726989 (1998-03-01), Dokic

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