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A bit allocation scheme for a class of embedded wavelet video encoders

机译:一类嵌入式小波视频编码器的比特分配方案

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In this paper, we investigate bit allocation strategies for a class of embedded wavelet video encoders. They take advantage of the precise control that such coders have over the bit-rate of each frame. We first show that a piecewise-linear model suits the rate x distortion characteristics of these encoders better than an exponential model, specially in low bit-rate applications. Then, we use an effective iterative procedure for dealing with the problem of frame dependency which yields improved rate x distortion results. Two types of embedded wavelet coders, using scalar and vector quantization, are tested. The results are encouraging, showing that the adoption of an adequate rate-control strategy can improve both objective and subjective quality of video sequences encoded using such embedded wavelet video encoders.
机译:在本文中,我们研究了一类嵌入式小波视频编码器的比特分配策略。他们利用这种编码器对每个帧的比特率进行精确控制的优势。我们首先表明,分段线性模型比指数模型更适合这些编码器的速率x失真特性,特别是在低比特率应用中。然后,我们使用有效的迭代过程来处理帧相关性问题,从而获得更高的速率x失真结果。测试了两种使用标量和矢量量化的嵌入式小波编码器。结果令人鼓舞,表明采用适当的速率控制策略可以提高使用此类嵌入式小波视频编码器编码的视频序列的客观和主观质量。

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