Research Of Rate Control Algorithms For JPEG2000

JPEG2000 and Motion-JPEG2000 have a very large potential application fields due to their excellent compression performance and many attractive features. Rate control is a very important part in JPEG2000 encoding. The more efficient a kind of rate control algorithm is,the higher coding efficiency, and the better image quality. Therefore, it is significant for JPEG2000 coding's software and hardware solution using more efficient rate-control algorithms.In terms of JPEG2000 coding, JPEG2000 standard's major coding step and classic rate-distortion theory are firstly described in the dissertation, and this is the background knowledge of JPEG2000 rate-control. Then, two rate-control mechanisms and the rate control technical recommended by the JPEG2000 standard which is named Post-coding Rate Distortion Optimization are introduced in detail. The algorithm, however, has the disadvantage of high computation redundancy. In order to improve the coding efficiency, a more efficient rate control technical is proposed which is named with VIREC (Variable number-of-passes Integrated...