| JPEG-LS图像压缩动态码率控制策略 |
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| 引用本文： | 徐燕凌,刘蓓.JPEG-LS图像压缩动态码率控制策略[J].计算机工程,2008,34(7):238-239. |
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| 作者姓名： | 徐燕凌 刘蓓 |
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| 作者单位： | 同济大学软件学院,上海,201804 |
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| 摘 要： | 对JPEG-LS图像压缩方案的编码特性进行数据分析，提出一阶码率控制策略与二阶码率控制策略，有效地实现了近无损图像编码过程中的码率动态调整。实验证明，该码率控制解决方案运算量小、收敛性好，能够有效抑制码率的大幅波动，在目标码率下可以稳定输出压缩码流，保证了编码图像的质量。
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| 关 键 词： | 图像 码率 控制 |
| 文章编号： | 1000-3428(2008)07-0238-02 |
| 修稿时间： | 2008年1月23日 |
Dynamic Rate Control Scheme for JPEG-LS Image Compression |
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| XU Yan-ling,LIU Bei.Dynamic Rate Control Scheme for JPEG-LS Image Compression[J].Computer Engineering,2008,34(7):238-239. |
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| Authors: | XU Yan-ling LIU Bei |
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| Affiliation: | ( School of Software, Tongji University, Shanghai 201804) |
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| Abstract: | This paper proposes coding performance of JPEG-LS image compression algorithm. One-rank rate control scheme and two-rank rate control scheme are proposed to perform dynamic rate control efficiently during the near lossless coding procedure. Experimental results show that these rate-control solutions have low operation requirement and good property of convergence. The fluctuation of bit-rate is effectively reduced. The compressed bit-stream is outputted stably under target bit-rate, and image compression quality is promoted. |
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| Keywords: | image rate control |
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