Content-based complexity reduction methods for MPEG-2 to H.264 transcoding

Shen Li*, Lingfeng Li, Takeshi Ikenaga, Shunichi Ishiwata, Masataka Matsui, Satoshi Goto


研究成果: Article査読

3 被引用数 (Scopus)


The coexistence of MPEG-2 and its powerful successor H.264/AVC has created a huge need for MPEG-2/H.264 video transcoding. However, a traditional transcoder where an MPEG-2 decoder is simply cascaded to an H.264 encoder requires huge computational power due to the adoption of a complicated rate-distortion based mode decision process in H.264. This paper proposes a 2-D Sobel filter based motion vector domain method and a DCT domain method to measure macroblock complexity and realize content-based H.264 candidate mode decision. A new local edge based fast INTRA prediction mode decision method is also adopted to boost the encoding efficiency. Simulation results confirm that with the proposed methods the computational burden of a traditional transcoder can be reduced by 20 ∼ 30 with only a negligible bit-rate increase for a wide range of video sequences.

ジャーナルIEICE Transactions on Information and Systems
出版ステータスPublished - 2007 1月

ASJC Scopus subject areas

  • ソフトウェア
  • ハードウェアとアーキテクチャ
  • コンピュータ ビジョンおよびパターン認識
  • 電子工学および電気工学
  • 人工知能