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。

关键词: 图像, 码率, 控制

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.

Key words: image, rate, control

中图分类号: 

• TP37