Method and apparatus for decoding mpeg video signals

Details Method and apparatus for decoding mpeg video signals Method and apparatus for decoding mpeg video signals

2005-02-01

2005-02-01

Kelley, Chris (Department: 2713)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240270, C375S240230

Reexamination Certificate

active

06850568

ABSTRACT:
A method and apparatus for decoding an input MPEG video stream are provided that includes a core processor with a very long instruction word (VLIW) processor and a co-processor that includes a variable length decoder (VLD) for decoding the MPEG video stream. The input MPEG video stream is organized into macroblocks, wherein each macroblock includes a header for a macroblock that is not decoded, and encoded data for a macroblock whose header is previously decoded by VLD. Thereafter, VLD decodes the encoded video data of a first macroblock whose header has been decoded, and decodes the header of a second (current) macroblock. VLIW then performs motion compensation on a current macroblock based upon reference data of a previously decoded macroblock. VLIW also adds a fake slice start code and fake macroblock data at the end of each picture into the input MPEG video data stream; and utilizes the fake slice start code and fake macroblock data to skip to a next slice. The fake macroblock data indicates an error to the VLD stopping the decoding process until the core processor clears the interrupt and reinitiates decoding of a selected macroblock.

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Leonardo Chiariglione, MPEG and Multimedia Comunications, Jul. 10, 1996 IEEE included herein.*
MPEG digital video coding standards, Dr. Thomas Sikora, Sep. 1997, IEEE included herein.

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