摘要
提出了一种适用于图像传输的,且在率失真意义上最优的小波分组分解的图像编码算法,不同于一般的小波分组图像编码,所提出的图像编码器将信道信息及信道编码情况考虑到信源编码中来,从而实现联合信源信道编码。小波分组子带编码采用位平面编码的方式,从而可以很好地结合不等差错保护(UEP)传输。提出了结合重量递增校验矩阵的LDPC码(WICP-LDPC)进行图像传输的方案。在BSC信道上的仿真实验表明,所提出的方法要优于使用均等差错保护的传输方案,并且所提出的传输系统在性能上也优于近几年来新提出的几种图像联合编码传输系统。
A novel joint source/channel image coding algorithm was proposed based on the best wavelet packet in a rate-distortion sense. Different from other wavelet packet image coding, the channel and the channel code information were introduced to the source coding, so the proposed algorithm was a joint source-channel coding. The coding of wave- let packet sub-band was bit plane, accorolingly, the bit streams could be good match to UEE And a WICP-LDPC code was using as a channel code. The simulation results in BSC channel show that, the proposed algorithm is better than the EEP image transmission system. And the proposed algorithm is also better than several other image transmission algo- rithms, which proposed recently.
出处
《通信学报》
EI
CSCD
北大核心
2012年第10期149-155,165,共8页
Journal on Communications
基金
国家自然科学基金资助项目(61032003)
国家科技重大专项基金资助项目(2010ZX03004-003-02)~~
