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- W2276097566 abstract "H.264 video coding standard, owing to its excellent compression efficiency, has become the key technology for various multimedia communication services such as digital TV, mobile video, and video streaming. Lost data will cause severe visual degradation and error concealment is thus developed for combatting the packet losses during transmission. Traditional error concealment techniques usually use blocks of fixed size and type. The lost data are interpolated by estimating the motion vector of missing blocks. The performance of error concealment is limited because an image block is not equivalent to a visual object. In this thesis, the visual object is used as the basic unit of error concealment. First, object segmentation is performed on reference frames and the uniformity of motion vectors is used to reinforce the result. Second, the motion vector of each object is identified by comparing pixels in reference and current frames. Finally, concealment is done after the motion vector is verified by the extended boundary matching algorithm (EBMA). The proposed method performs well for videos with simple color distribution and large objects. The average PSNR is increased by 0.02 dB to 0.22 dB as compared to the previous method." @default.
- W2276097566 created "2016-06-24" @default.
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- W2276097566 date "2012-01-01" @default.
- W2276097566 modified "2023-09-27" @default.
- W2276097566 title "以物件分割為基礎之H.264/AVC錯誤隱藏技術" @default.
- W2276097566 hasPublicationYear "2012" @default.
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