| H．264标准中整数DCT图像压缩算法的优化及实现 |
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| 引用本文： | 陈宝远,吴孟泽,张清喜,郝艳莉.H．264标准中整数DCT图像压缩算法的优化及实现[J].哈尔滨理工大学学报,2009,14(5):27-30. |
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| 作者姓名： | 陈宝远 吴孟泽 张清喜 郝艳莉 |
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| 作者单位： | 哈尔滨理工大学,测控技术与通信工程学院,黑龙江,哈尔滨,150040 |
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| 摘 要： | H．264视频编码标准采用整数离散余弦变换（DCT）算法，避免了反变换中的误匹配问题，与传统的余弦变换相比，整数DCT加快了变换速度，且易于硬件实现．本文分析了H．264的整数DCT的原理及采用蝶形快速算法的实现方法，对整数DCT的变换核进行了优化，并对新的变换核应用MATLAB软件进行了仿真．结果表明，采用优化后的变换核的整数DCT更接近于离散余弦变换。且提高了重建视频图像的主观质量．
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| 关 键 词： | 整数DCT 蝶形快速算法 变换核 |
Research and Implentation of Integer DCT in H.264 Based on DSP |
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| CHENG Bao-yuan,WU Meng-ze,ZHANG Qing-xi,HAO Yan-li.Research and Implentation of Integer DCT in H.264 Based on DSP[J].Journal of Harbin University of Science and Technology,2009,14(5):27-30. |
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| Authors: | CHENG Bao-yuan WU Meng-ze ZHANG Qing-xi HAO Yan-li |
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| Affiliation: | (School of Measure-control Technology and Communication Engineering, Harbin University of Science and Technology, Harbin 150040,China) |
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| Abstract: | Using the integer Discrete Cosine Transform（ DCT）, H. 264 avoids the mismatch problem, and in-creases the computation speed and make hardware implementation easy. This paper analysed the principle of the H. 264 integer DCT and fast papilionaceous algorithm, and changed its transform core, simulated the new core using MATLAB. The results show that integer DCT with new transform core is closer than DCT, and enhances the subjective quality of reconstruction image. |
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| Keywords: | integer DCT fast papilionaceous algorithm transform core |
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