Study on Intra-Transcoding for AVS in Transform Domain
Min Shi · Communications technology · 2011
Based on the differences between intra predictions of MPEG-2 and AVS standards,an intra prediction transcoding algorithm based on transform domain is described in this paper.A new transcoding structure in transform domain is proposed for the algorithm.By matrix operation,the corresponding DCT prediction matrices of all AVS intra prediction modes are calculated,and the transformation matrix from DCT domain to AVS integer transform domain is deduced.Meanwhile the computation of intra prediction matrix transforming in transform domain is given and analyzed.Experimental results show that the proposed intra prediction transformation algorithm could have a reduction of 50% calculation and meet the demand for real-time transcoding.