...聚焦点；聚焦区；码率分配 [gap=905]Key words:video coding; human visual system; fovea point; fovea region; bit allocation ...
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Secondly, rate allocation problem of FGS bit-stream is discussed and solved.
其次,精细可分级编码的码率分配问题得以解决。
参考来源 - 可分级编码及其相关传输问题的研究The method resolves problems in the standard method when the bit allocation is too uniform and the encoded frame history information is omitted.
该算法解决标准中原算法码率分配过于平均和不能充分利用已编码帧历史信息的问题。
参考来源 - 基于H.264的码率控制算法So a rate-distortion optimizer for the SPIHT is designed to give an adaptive lifting of the rate-distortion slopes, which not only makes up the deficiency of bit allocation in SPIHT, but also protects the spectral information efficiently.
基于上述研究结论,该算法在光程差方向上,逐渐提升率失真函数的斜率,增大对图像的保护程度,这样不仅弥补了SPIHT算法在码率分配上的不足,而且有效的保护了傅里叶域中的光谱信息。
参考来源 - 干涉高光谱图像高效压缩技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
针对实际应用中的缓冲区的限制，我们还提出了滑动窗口的码率分配方案。
To satisfy the buffer constrain in practice, a sliding window based rate allocation scheme is also proposed.
同时，该算法的计算复杂度低，完全能满足视频服务器实时码率分配的要求。
Simultaneously, the computational complexity of the proposed method is low enough to meet the requirements of the real time rate allocation at the video server.
该文提出了一种基于感兴趣区的MPEG-4 FGS增强层码率分配算法。
ROI-based rate allocation algorithm for the MPEG-4 FGS enhancement layer is proposed in this paper.
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