摘要
在将保真范围扩展(FRExt)修改添加到H.264高级视频编码(AVC)标准中时,高分布中自适应地使用4×4和8×8整数离散余弦变换(DCT),这导致具有相当高的计算复杂度的H.264/AVC编码器更加地复杂。针对该问题,文中提出了一种新的算法。通过在8×8块中重用所产生的4×4块的整数DCT系数,减少了第一级计算的操作数目。结果表明,水平8×8整数DCT实现的计算复杂度降低超过25%,计算时间减少22%。
The 4×4 and 8×8 integer discrete cosine transforms （DCTs） are adaptively used in the high distribu- tion when adding the fidelity range extension （FRExt） modification to the H. 264 Advanced Video Coding （AVC） standard, leading to even higher complexity of the already computation - intensive H. 264 / AVC encoder. A new algorithm is proposed, by which the number of operations in the first stage calculation is reduced by reusing the generated integer DCT coefficients of the 4×4 blocks in 8x8 blocks. The results show that the computational complexity of the 8 × 8 integer DCT is reduced by more than 25% and the computation time is reduced by 22%.
出处
《电子科技》
2017年第6期43-45,49,共4页
Electronic Science and Technology
关键词
H.264标准
离散余弦变换
计算复杂度
软件实现
H. 264 standard
discrete cosine transform
computational complexity
software implementation
