Patent ID: 6597741
Filing Date: 2003-07-22
Classification: H04N

Abstract:
A video decoding apparatus for decoding a coded video signal containing a sequence header and at least one coded picture, said sequence header including picture size data, the apparatus comprising:a sequence header decoder for decoding a coded sequence data contained in said header and storing the decoded sequence data in a memory; a video decoder for performing a decoding process on a coded picture and producing a first macroblock count from the decoded picture and suspending the decoding process when the first macroblock count is produced, said macroblock count representing a number of macroblocks contained in the decoded picture; and control circuitry for (a) determining a second macroblock count from picture size of the sequence data stored in said memory, (b) comparing said first macroblock count with said second macroblock count, (c) if said first and second macroblock counts are not equal to each other, estimating a picture size based on said second macroblock count and correcting the sequence data in said memory with data representing the estimated picture size, and (d) instructing said video decoder to resume the decoding process by using the sequence data of said memory immediately after said first and second macroblock counts are determined to be equal to each other or immediately after the sequence data in said memory is corrected.