| 摘要 |
The invention relates to a method and apparatus for temporally synchronising the input bit stream of a video decoder with the processed video sequence decoded by the video decoder, the method comprising the steps of: a) capturing the input bit stream and supplying it to a bit stream analyzer; b) analyzing the captured bit stream by the bit stream analyzer to generate error maps I(x,y,t) and a set A of pixels that have been impacted by packet loss, wherein I(x,y,t) denote the error map value at location ( x,y ) of the t -th frame, x = 0, 1, ..., M, and y = 0,1,..., N, where M, N are the horizontal and vertical dimensions of each frame of the video sequence, respectively; c) storing, in a buffer, the error maps of N rec frames, internally generated by the bit stream analyzer within the probe; and d) comparing the stored error maps of the N rec reconstructed frames with the corresponding error map of the current processed video sequence, to find a matching frame n * from the set of reconstructed frames in the buffer that matches the current image of the processed video sequence. |
