An Efficient Adaptive Rate Control for JPEG2000 in Digital Cinema Encoding System
符合DCI规范的JPEG2000自适应码率控制方法

Digital Cioema encoding system based on DCI specification has special constraints on the bit-rate and image quality of image sequences. In this paper, it is shown that for a given average bit-rate, the average distortion of the image sequence is minimized, when the image quality is constant. A simple and efficient adaptive rate control method is proposed, which is based on the PCRD-opt(post-compression rate-distortion optimization) rate control algorithm of JPEG2000. Without additional computations, the method could meet the rate and quality constraints. The experiment results show that the proposed method is efficient for different types of image sequences, and it suits for the Digital Cinema encoding system.