Patent ID: 6700934
Filing Date: 2004-03-02
Classification: H04N

Abstract:
An error detector for a video bitstream comprising:a macroblock parser for locating macroblock data in the video bitstream for a current macroblock; a motion vector reader, coupled to the macroblock parser, for outputting a plurality of block motion vectors for a plurality of blocks within the current macroblock when the current macroblock is encoded as the plurality of blocks; a calculation unit, receiving the plurality of block motion vectors from the motion vector reader, for performing a predetermined function on pairs of block motion vectors in the plurality of block motion vectors to generate a function result for each of the pairs of block motion vectors; and a comparator, receiving the function result from the calculation unit, for comparing the function result to a predetermined threshold, the comparator signaling an error when the function result for any of the pairs of block motion vectors exceeds the predetermined threshold, whereby pairs of block motion vectors for blocks within the macroblock are operated on by the predetermined function and compared to the predetermined threshold to detect the error.