Error tracking and error mitigation for video compression based on motion compensation

摘要

A method (1000) of tracking an error in a frame of a video to a subsequent frame of the video, each frame in the video being divided into a plurality of blocks arranged in a number of rows and columns, each frame of the video being determined by a technique comprising generating motion vectors for blocks of the frame, the method comprising: (a) receiving an error notification message at an encoder, the error notification message comprising (1002) information identifying a defective frame of the video and information identifying portions of the faulty frame detected as having an error during decoding; (b) identifying the frame immediately following the defective frame as the reference frame at the encoder (1006); (c) obtaining minimum and maximum horizontal motion vector components for each column of blocks of the reference frame at the encoder; (d) obtaining minimum and maximum vertical motion vector components for each row of blocks of the reference frame at the encoder; and (e) identifying, from the minimum and maximum horizontal and vertical motion vector components for the reference frame (1008, 1010, 1018), a rectangular area of blocks of the reference frame at the encoder to which the error is likely to propagate.