画像の処理と符号化　　フレーム毎にＭＣと３次元予測を最適化する動画像の可逆符号化方式

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  • A Lossless Video Coding Scheme Using MC and 3D Prediction Optimized for Each Frame
  • フレーム毎にMCと3次元予測を最適化する動画像の可逆符号化方式
  • フレーム ゴト ニ MC ト 3ジゲン ヨソク オ サイテキカ スル ドウガゾウ ノ カギャク フゴウカ ホウシキ

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A novel lossless coding scheme for video signals is described. The scheme uses a block-adaptive 3D prediction method that predicts a video signal based on both the current and motion-compensated previous frames. The resulting prediction errors are encoded by using a kind of context-adaptive arithmetic coder. Several coding parameters such as prediction coefficients and motion vectors are iteratively optimized for each frame so that the overall coding rate can be a minimum. Moreover, a quadtree-based variable block-size motion compensation technique is introduced for efficient representation of motion information. Experimental results show that the coding rates of our scheme are 11-17% lower than those of the H. 264-based lossless coding scheme.<p>We apologize for reversing pages 1052 and 1053 of the article of vol. 60, no. 7/no.7, vol. 60 (pp. 1051-1058) in the July issue. This is the correct version.

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