Data replacement method and circuit for motion prediction cache

Details Data replacement method and circuit for motion prediction cache Data replacement method and circuit for motion prediction cache

2006-01-30

2008-09-23

Sajous, Wesner (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics display memory system

Cache

C345S606000, C345S555000, C345S556000, C345S475000, C382S232000, C382S233000, C382S238000, C711S113000, C711S118000, C711S125000, C348S394100, C375S240250

Reexamination Certificate

active

07427990

ABSTRACT:
A system for decoding a video bitstream and a method for replacing image data in a motion prediction cache are described. For each of the cache lines, a tag distance between pixels stored in the cache line and uncached pixels that are to be stored in the cache is calculated. The calculated tag distance is used to determine whether the pixels are outside a local image area defined about the uncached pixels. Pixels determined to be outside the local image area are replaced with the uncached pixels. The motion prediction cache can be organized as sets of cache lines and the method can be performed for each of the cache lines in one of the sets. The definition of the sets can be changed in response to cache performance. Similarly, the local image area can be redefined in response to cache performance.

REFERENCES:
patent: 2003/0222877 (2003-12-01), Tanaka et al.
patent: 2006/0050976 (2006-03-01), Molloy
patent: 2007/0008323 (2007-01-01), Zhou

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