Method and apparatus for decoding video data

Details Method and apparatus for decoding video data Method and apparatus for decoding video data

1998-12-09

2000-11-07

Young, Brian

Coded data generation or conversion

Digital code to digital code converters

To or from differential codes

H03M 700

Patent

active

061443239

ABSTRACT:
In order to reduce memory bandwidth when predicting B-frames from stored anchor frames in an MPEG-2 video decoder, memory access requests (20) to external memory (14) storing anchor frames are selectively suppressed (18) so that only data is accessed which is required for the current data to be displayed. To still further reduce memory bandwidth, a prediction type (frame picture-frame prediction-half pel filtering) which requires a large number of memory requests is approximated to a type (field prediction) which requires half as many memory requests.

REFERENCES:
patent: 5293229 (1994-03-01), Iu

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