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    题名: Estimating Rate-Distortion for Multiple Description Coding Based on Zero Padding
    作者: Chang, Rong-Hua;Su, Chieh-Wei;Lin, Chow-Sing
    关键词: Multiple Description Coding;Zero Padding;Rate-Distortion;Scalable Video Coding
    日期: 2016-06
    上传时间: 2017-01-03
    出版者: 淡江大學出版中心
    摘要: In the studies related to multiple description coding (MDC), applying zero padding not only
    improves the spatial correlation between descriptions but also increases their sizes. However, as we
    pad more zeros, the spatial correlation does not improve linearly. Therefore, the distortion is not
    reduced as the same amount when the size increases. In this paper, we focus on how to efficiently find
    an acceptable trade-off between the number of padded zeros and the increase of distortion in MDC. In
    this paper, we propose two distortion estimations for MDC with zero padding based on spatial
    quincunx distribution, which are standard deviation for distortion estimation and triangular linear
    approximation distortion estimation (TLA-DE) to efficiently calculate the distortion for the number of
    padded zeros atthe horizontal direction. In order to search for the acceptable number of padded zeros,
    we propose two search methods, Naïve Search and Best Division Search, which are both based on the
    proposed rate-distortion trade-off indicator. Our experiments result show that the worst error of
    distortion estimation by TLA-DE is up to 18%, but the average is 5.5% with 95% confidence level.
    The executing time of best division search is about two times faster than that of naïve search for 11 test
    sequences. To sum up, we confirm that the acceptable trade-off between rate and distortion in low
    computational complexity can be found by using the best division search on TLA-DE.
    關聯: Journal of Applied Science and Engineering 19(2), pp.229-239
    DOI: 10.6180/jase.2016.19.2.14
    显示于类别:[淡江理工學刊] 第19卷第2期

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