Patent ID: 7020207
Filing Date: 2006-03-28
Classification: H04N

Abstract:
1. A method of correcting errors in a compressed motion picture signal having a plurality of frame pixel blocks in a current frame which include corrupt blocks and non-corrupt blocks, the method comprising: decoding non-corrupt blocks of the compressed motion picture signal; determining a % corruption of the current frame by counting a number of corrupt blocks and dividing the number of the corrupt blocks by a total number of blocks in the current frame; and for each main block in the current frame which is corrupt and an old main block in a previous frame immediately preceding the current frame and corresponding to the main block in the current frame, determining a percentage use representing a percentage of content in the old main block which has moved outside the main block in the current frame; and if the % corruption is smaller than a minimum corrupt threshold and if the percentage use is smaller than a minimum use threshold, then assigning zero motion vector to the main block in the current frame.