Study of Image Quality Recovery by Motion Vectors in Real-Time Video-Transmission (マルチメディア情報処理,映像表現,ネットワーク映像メディア,画像情報システム第4回International Workshop on Advanced Image Technology (IWAIT2002))

概要

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We proposed a video-transmission method that recovers the video degradation imposed by data losses at the receiver. P and I-pictures have high priority while B-pictures have low priority. This method uses the divided motion vector of next P-picture to the B-picture, which was lost in transmission. This method can improve the video quality. Unfortunately, the block-noise created by quick motion triggers an increase in intra-macroblock frequency. This paper introduces an improved recovery method that decreases block-noise by adding temporary motion-vectors to intra-macroblocks to decrease the difference from inter-macroblocks. A key result is the preservation of object edges; improvements are also seen in terms of PSNR and PQR values. A subjective evaluation indicates that the improvement in recovered video quality is discernable.
社団法人映像情報メディア学会の論文
2002-01-18