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一种类DCT的8×8整数变换

DOI: 10.11834/jig.200408176

Keywords: 整数变换,离散余弦变换,能量集中率,去相关效率,音视频编码标准

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Abstract:

整数变换因其高效的计算性能而被最新的国际视频编码标准H.264采纳,我国的第一个音视频编码标准AVS也将采用8×8整数变换。变换模块的性能直接影响编解码器的性能,所以选择性能优异的变换基尤为重要。本文在8×8类DCT整数变换原理的基础上,提出了一种结合能量集中率和去相关效率的变换基变换性能评价方法,同时考虑计算复杂度,在理论上选出了几组性能较好的整数变换基。通过分析视频序列测试结果,讨论得出不同变换基的适用场合,并且验证了理论评价结果的正确性

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