Video transrating in AVC and HEVC transcoding
This addresses video compression efficiency for services transitioning from AVC to HEVC, but it is incremental as it builds on existing transcoding methods.
The paper tackled the problem of transcoding AVC-coded video to HEVC with bitrate reduction, finding that this approach achieves better rate-distortion performance compared to compressing the original video with AVC at the same reduced bitrate.
HEVC (MPEG-H Part 2 and H.265) is a new coding technology which is expected to be deployed on the market along with new video services in the near future. HEVC is a successor of currently widely used AVC (MPEG-4 Part 10 and H.264). In this paper, the quality coding gains obtained for the Cascaded Pixel Domain Transcoder of AVC-coded material to HEVC standard are reported. Extensive experiments showed that transcoding with bitrate reduction allows the achievement of better rate-distortion performance than by compressing an original video sequence with the use of AVC at the same (reduced) bitrate.