Efficient rate control algorithm for JPEG2000 based on PSMSD
Kong Fanqiang, Yunsong Li, Chengke Wu, Keyan Wang · Systems engineering and electronics · 2008
After the elaborate analysis for the rate allocation algorithm based on priority scanning, a fast and efficient rate control algorithm for JPEG2000 based on priority scanning and minimal slope discarding is presented to eliminate influence of priority scanning rate allocation algorithm to the reconstructed image quality. The coding passes of all coding blocks are encoded by T1 encoder with bit-plane priority. After the accumulate bit-rate exceeds the target bit-rate, minimal slope discarding scheme is used for all blocks to complete the rate-distortion optimization truncation, which can more efficiently reduce the redundancy of T1. The experimental results show that the proposed scheme can efficiently reduce both the computational cost and working memory size of the entropy coding process, while obtaining almost the same performance as the conventional rate control algorithm in JPEG2000 standard.