Inter-mode prediction selection algorithm for MPEG-2 to AVS transcoder

In image transformation domain, the energy distribution reflects the image texture feature which contains the orientation relativity among macroblocks. In this paper, a new algorithm aiming at the inter-frame coding for MPEG-2 to AVS transcoder is proposed. Based on the analysis of statistical data, the number of times on intra-coding mode in inter-frame coding is reduced, and then, the P and B frame transcoding time is reduced. At the same time, the image quality only has a little drop. The experiment results show that compared with the cascaded method and other similar algorithms, our proposed algorithm can obtain obvious reduction in transcoding time at the cost of a slight decrease in SNR(Signal Noise Ratio) and a slight increase in bit rate.