首页> 外文会议>IEEE International Conference on Acoustics, Speech and Signal Processing;ICASSP 2009 >Rate-distortion optimized bitstream extractor for motion scalability in scalable video coding
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Rate-distortion optimized bitstream extractor for motion scalability in scalable video coding

机译:率失真优化的比特流提取器,可扩展视频编码中的运动可扩展性

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摘要

Motion scalability is designed to improve the coding efficiency of a scalable video coding framework, especially in the medium to low range of decoding bit rates or spatial resolutions. In order to fully benefit from the superiority of motion scalability, a rate-distortion optimized bitstream extractor, which determines the optimal motion quality layer for each decoding scenario, is required. In this paper, the determination process first starts off with a brute force searching algorithm. Although guaranteed by the optimal performance within the search domain, it has high computational complexity. Two properties, i.e. the monotonically non-decreasing property and the unimodal property, are then derived to accurately describe the rate-distortion behavior of motion scalability. Based on these two properties, modified searching algorithms are proposed to reduce the complexity by a factor up to 5.
机译:运动可伸缩性旨在提高可伸缩视频编码框架的编码效率,尤其是在解码比特率或空间分辨率的中低范围内。为了充分利用运动可伸缩性的优越性,需要一种速率失真优化的比特流提取器,其确定每种解码方案的最佳运动质量层。在本文中,确定过程首先从蛮力搜索算法开始。尽管通过搜索域内的最佳性能来保证,但它具有很高的计算复杂度。然后导出两个属性,即单调非递减属性和单峰属性,以准确描述运动可伸缩性的速率失真行为。基于这两个属性,提出了改进的搜索算法,以将复杂度降低多达5倍。

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