摘要
该文提出了一种噪声信道下传输渐进图像的联合信源信道编码方法。该方法根据信道条件的好坏动态的调整信源编码速率和信道编码速率,因此极大地提高了系统的性能和编码效率。同时该方法还具有结构简单,易于实现等优点。试验证明本方法与以前文献中提出的EEP方法以及UEP方法相比,在信噪比低时即信道条件恶劣的情况下,能够明显提高恢复图像的质量。
In this paper, a joint source channel coding scheme used to transmit progressive image bit stream over noisy channel is proposed. The method can dynamically adjust the rates between source coding and channel coding, thus yields good performance and high efficiency. It still has the advantages of simplicity in system structure and ease in realization. Simulation results show that this scheme can highly improve the image quality compared to EEP and UEP scheme proposed previously especially when the channel is in bad condition.
出处
《电子与信息学报》
EI
CSCD
北大核心
2002年第12期1835-1841,共7页
Journal of Electronics & Information Technology
基金
国家自然科学基金(No.60002007)
