DECODING AND DISPLAYING METHOD OF COMPRESSING DIGITAL VIDEO SEQUENCE AND DECODING DEVICE OF COMPRESSING DIGITAL VIDEO INFORMATION

摘要

A system and method are provided which reduce the memory requirements of a decoding subsystem by decoding some pictures multiple times. In a preferred embodiment a video decoder stores only two decoded frames plus a small fraction of a third decoded frame in memory. This embodiment is particularly pertinent to digital video signals compressed according to the MPEG-2 standard. In such an embodiment, each reference picture is decoded once, each field-structured B-picture is decoded once, each frame-structured B picture without a repeated field is decoded twice, and each frame-structured B picture with a repeated field is decoded three times. <IMAGE>