基于重要性权值的自适应率控制算法

An Adaptive Rate Control Algorithm Based on Significant Priority

针对优化截取内嵌块编码提出一种基于重要性权值的自适应率控制算法.对所有编码过程根据其所在的比特平面和编码类型赋予不同的重要性权值,由高到低依次进行T1编码.T2编码器由已编码比特率自适应地反馈控制编码深度,完成优化截取.实验结果表明:本方法有效地减少了计算量和存储量,易于硬件实现.

An adaptive rate control algorithm based on significant priority is presented for embedded block coding with optimized trtmcation. The coding passes of all coding block are evaluated by different significant priority according to the bit-planes the pass located in and the coding type, which are encoded by T1 encoder in the significant priority order. T2 encoder sends feedback to control the coding depth by the accumulated bit rate and complete the rate-distortion optimization trtmcation. The experimental results show that the proposed scheme can efficiently reduce the cost of computation and memory usage, which is suitable for hardware implementation.