抄録
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.
本文言語 | English |
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ページ(範囲) | 90-98 |
ページ数 | 9 |
ジャーナル | IEICE Transactions on Information and Systems |
巻 | E90-D |
号 | 1 |
DOI | |
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