Video decoder error handling

摘要

A video decoder performs a sequential error handling process to detect and conceal errors within a corrupted data segment of video data units. The decoder sequentially decodes a current data unit. Upon detecting an error, the decoder sets an error flag and resynchronizes decoding at the start of the next unit. If the error flag is set, the video decoder identifies the end of the corrupted data segment based on the start of the later unit. The decoder conceals data between the start of the current unit and the end of the corrupted data segment. If the error flag is not set, the decoder may decode the remainder of the current unit and proceed to decode the next available unit without performing error handling and concealment for the current unit. The decoder also may address reference unit mismatches caused by lost video data units.

主权项

1. A video decoding method comprising:
determining a start of a current unit of encoded video data; decoding at least a portion of the current unit without determining a start of a next available unit of the encoded video data; detecting a decoding error in the current unit; when the decoding error is detected, determining the start of the next available unit of the encoded video data; determining an end of a corrupted data segment based on the start of the next available unit, wherein the current unit is a current slice of a first frame, and the corrupted data segment includes the current slice and at least one additional slice of encoded video data from a second frame; and concealing the corrupted data segment based on the start of the current unit and the end of the corrupted data segment.