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  • 标题:動画像符号化におけるサブバンド分割を用いた高速Matching Pursuitsアルゴリズム
  • 本地全文:下载
  • 作者:今村 幸祐 ; 小場 由雅 ; 橋本 秀雄
  • 期刊名称:映像情報メディア学会誌
  • 印刷版ISSN:1342-6907
  • 电子版ISSN:1881-6908
  • 出版年度:2006
  • 卷号:60
  • 期号:7
  • 页码:1059-1067
  • DOI:10.3169/itej.60.1059
  • 出版社:The Institute of Image Information and Television Engineers
  • 摘要:A high-efficiency video coding method using matching pursuits, which is a waveform coding technique, was proposed. This method encodes a motion compensated prediction error image by applying matching pursuits. The matching pursuits algorithm approximates a signal using a dictionary. Therefore, the performance of this algorithm depends heavily on the dictionary. We propose a matching pursuits coding method that encodes the sub-band images derived from motion compensated prediction error images. The dictionaries used in our method are constructed to be suitable for the frequency characterisitc of each sub-band image. The complexity of our method is reduced compared with the full-band matching pursuits because of lighter inner product computation due to a reduction in both the resolution of the sub-band image and the basis function length of the dictionary. We evaluated the coding performance and computational complexity of our method via computer simulations.
  • 关键词:Video coding;Waveform coding;Matching pursuits;Sub-band decomposition
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