|
|||||
|
|
| 低码率视频编码中基于对角线抽样的混合DCT算法 | |
| 引用本文： | 陈志波,何芸,郑君里. 低码率视频编码中基于对角线抽样的混合DCT算法[J]. 计算机工程与应用, 2001, 37(1): 4-7 |
| 作者姓名： | 陈志波 何芸 郑君里 |
| 作者单位： | 清华大学电子工程系, |
| 基金项目： | 国家自然科学基金!No．69672028，No．69972021资助。 |
| 摘 要： | 该文提出了一个适用于低码率视频编码的基于对角线抽样（ＤＳ－Ｄｉａｇｏｎａｌｌｙ Ｓａｍｐｌｅｄ）的混合快速 ＤＣＴ编码方案，此方案包含一个新的 ３系数ＤＣＴ算法，同时提出了基于 ＤＳ的计算色度ＳＡＤ（Ｓｕｍ ｏｆ Ａｂｓｏｌｕｔｅ Ｄｉｆｆｅｒｅｎｃｅ）的方法用于有效准确地检测全零或３系数的色度块。这一混合算法可以有效的降低ＤＣＴ、ＩＤＣＴ、量化和反量化的运算量，提高编码器处理速度，而不会导致明显的图象质量的下降。 |
| 关 键 词： | 对角线抽样 离散余弦变换 色度块 低码率视频编码 |
| 修稿时间： | 2000-08-01 |
A Novel DS-Based Hybrid DCT for Low Bit-Rate Video Coding |
|
| Chen Zhibo,He Yun,ZHENG Junli. A Novel DS-Based Hybrid DCT for Low Bit-Rate Video Coding[J]. Computer Engineering and Applications, 2001, 37(1): 4-7 | |
| Authors: | Chen Zhibo He Yun ZHENG Junli |
| Abstract: | In this paper,a DS-Based hybrid DCT strategy is proposed,including a novel 3 coefficients DCT and an algorithm calculating chroma SAD(Sum of Absolute Difference)from Diagonally Sampled pixels is also introduced to effectively detect All-zero or Three-coefficient chroma blocks. This hybrid coding strategy efficiently decrease the computation of DCT, IDCT, quantization and inverse quantization, which achieves significant improvement in the processing speed with negligible video-quality degradation. |
| Keywords: | DS(Diagonally Sampled) DCT(Discrete Cosine Transform) chroma block low bit-rate video coding |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |