| 图像多次无降质编解码的研究 |
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| 引用本文： | 易彦,孙军,余松煜. 图像多次无降质编解码的研究[J]. 上海交通大学学报, 2004, 38(4): 616-619 |
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| 作者姓名： | 易彦 孙军 余松煜 |
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| 作者单位： | 上海交通大学,图像通信与信息处理研究所,上海,200030;上海交通大学,图像通信与信息处理研究所,上海,200030;上海交通大学,图像通信与信息处理研究所,上海,200030 |
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| 基金项目： | 上海市青年科技启明星计划项目(01QD14030),上海市科学技术委员会科研项目(025115020) |
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| 摘 要： | 利用向量矩阵的完全可逆性和量化过程的幂等特性,在编解码过程中引入可逆整数DCT实现了图像的多次无降质编解码．在此基础上,借鉴量化DCT的思想,进一步将可分的量化矩阵分解为多个向量矩阵的组合与乘积,提高了图像第1次编解码后的图像质量．该方法与AT—LANTIC计划中提出的“鼹鼠”计划相结合。可实现高质量的视频多次无降质编解码．
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| 关 键 词： | 编码 解码 数字电视 向量矩阵 量化离散余弦变换 |
| 文章编号： | 1006-2467(2004)04-0616-04 |
| 修稿时间： | 2003-03-16 |
Research on the Several Generations of Coding-Decoding Image without Quality Degradation |
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| YI Yan,SUN Jun,YU Song-yu. Research on the Several Generations of Coding-Decoding Image without Quality Degradation[J]. Journal of Shanghai Jiaotong University, 2004, 38(4): 616-619 |
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| Authors: | YI Yan SUN Jun YU Song-yu |
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| Abstract: | The reversible integer DCT is introduced into the image coding-decoding in order to implement the several generations of coding-decoding without quality degradation due to the perfect reversibility of vector matrix and the idempotent property of the quantization. Based on it,the separable quantization matrix is factorized into the combination and product of several vector matrices by making use of the idea of quantized-DCT, so as to improve the image quality of the first generation further. This proposed method can be easily extended to implement the several generations of video coding-decoding of better quality when combined with the "MOLE" technology presented in ATLANTIC plan. |
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| Keywords: | coding decoding digital television vector matrix quantized-DCT |
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