| 摘要 |
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 which is required for the current data to be displayed is accessed. 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. |
