A videoconferencing-oriented hybrid-domain H.264/SVC to H.264/AVC spatial transcoder

Lei Sun*, Zhenyu Liu, Takeshi Ikenaga

*この研究の対応する著者

研究成果: Conference contribution

抄録

As an extension of H.264/AVC, Scalable Video Coding (SVC) provides the ability to adapt to heterogeneous requirements. However, transcoding between SVC and AVC becomes necessary due to the existence of legacy AVC-based systems. The straightforward full re-encoding method requires great computational cost, and fast SVC-to-AVC spatial transcoding techniques have not been thoroughly investigated yet. This paper proposes a low-complexity SVC-to-AVC spatial transcoder in hybrid domain (pixel domain & transform domain) with drift compensation. In the pixel-domain transcoding, a fast re-encoding method is proposed based on mode mapping and MV refinement. In the transform-domain transcoding, the quantized transform coefficients together with motion data are reused directly to avoid re-quantization loss. At last, the drift problem in proposed transcoder is solved. Simulation results show that proposed transcoder achieves averagely 96.4% time reduction compared with the full re-encoding method, and outperforms the reference methods in coding efficiency.

本文言語English
ホスト出版物のタイトルAdvances in Multimedia Information Processing, PCM 2012 - 13th Pacific-Rim Conference on Multimedia, Proceedings
ページ129-141
ページ数13
DOI
出版ステータスPublished - 2012 12月 27
イベント13th Pacific-Rim Conference on Multimedia, PCM 2012 - Singapore, Singapore
継続期間: 2012 12月 42012 12月 6

出版物シリーズ

名前Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
7674 LNCS
ISSN(印刷版)0302-9743
ISSN(電子版)1611-3349

Conference

Conference13th Pacific-Rim Conference on Multimedia, PCM 2012
国/地域Singapore
CitySingapore
Period12/12/412/12/6

ASJC Scopus subject areas

  • 理論的コンピュータサイエンス
  • コンピュータ サイエンス(全般)

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