Video quality in AVC homogenous transcoding

In this paper the results obtained for homogenous Cascaded Pixel Domain Transcoder of AVC bitstreams are reported in order to show the expected transcoding efficiency gain/loss. A wide set of test video sequences has been used in experiments and in total 19200 bitstreams have been encoded and examined. It has been proved that there is a universal dependency between the quality, defined as ΔPSNR and bitstream reduction. ΔPSNR is described as the difference between quality of the transcoded material and the original material that could potentially be encoded at the same bitrate as the transcoded one.