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    National Tsing Hua University Institutional Repository > 電機資訊學院 > 資訊工程學系 > 會議論文  >  Very Low Bit-rate Video Compression with Employing Motion Vector Only


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/16056


    Title: Very Low Bit-rate Video Compression with Employing Motion Vector Only
    Authors: Pol Lin Tai;Chii Tung Liu;Jia SHung Wang
    教師: 王家祥
    Date: 2000
    Publisher: ACTA Press
    Relation: Proceedings of 2000 Conference on Signal Processing and Communications, Marabella, Spain, 19-22 Sept. 2000
    Keywords: very low bit-rate video compression
    motion vector segmentation
    video coding algorithm
    data compression
    discrete cosine transforms
    Abstract: ©2000 ACTA-In this paper, a novel and effective video coding algorithm for very low bit rate applications is presented. The major characteristic is that it employs the motion vector only to encode video without using any transformation coding. Traditional motion compensation transform coding methods utilize motion vectors to reduce temporal redundancy and DCT to remove spatial redundancy. In the very low bit rate environment, such a coding approach may not obtain best performance. A large portion of the bit rate was used to code motion vectors, the bit rate remaining for DCT is restricted to a small portion thus it can not gain better PSNR improvement. In this paper, a video coding algorithm that employs motion vectors only to compress video is proposed. First, a source model is developed to compare the coding effect between employing motion vectors only and applying DCT. Then a restricted segmentation pattern is constructed to segment motion vectors effectively. The resulting performance has an overall improvement compared to H.263; for example, the PSNR improvement of sequence “Claire” is 1.2 dB at bit rate 8.8 kb/s
    Relation Link: http://www.actapress.com/
    URI: http://nthur.lib.nthu.edu.tw/handle/987654321/16056
    Appears in Collections:[資訊工程學系] 會議論文

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