Fast Decision and Motion Estimation Algorithm for H.264/AVC to HEVC Video Transcoding

• Main Authors: Dong-Yi Lu, 呂東益
• Other Authors: Mei-Juan Chen
• Format: Others
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/2z7c55

碩士 === 國立東華大學 === 電機工程學系 === 102 === To satisfy the demand of growing popular high definition video and the emergence of beyond-HD formats, the JCT-VC, which works together by ITU-T VCEG and ISO/IEC MPEG standardization organizations, has standardized next generation video coding standard called high efficiency video coding (HEVC) to provide around 50% bit-rate reduction with compatible quality representation compared to H.264/AVC. However, HEVC greatly increases the computational complexity at the video encoder. Therefore, efficient transcoding algorithms to enable HEVC applications are highly desired. In this thesis, we investigate the relationship of prediction mode, motion vector and residual information between H.264/AVC and HEVC, and propose an efficient algorithm on fast decision of coding unit and prediction unit for the video transcoding from H.264/AVC to HEVC. In addition, we also utilize the motion vector and motion vector difference decoded from H.264/AVC bit-stream to reduce the search range of motion estimation in HEVC encoder and thus further reduce coding complexity. Experimental results show that our proposed transcoding algorithm can provide better rate distortion performance and time saving than previous work.