基于EREC与解码自截断的小波图像抗差错传输技术

EREC and Self-truncation Decoding Based on the Error-resistance Technology for the Wavelet Image Transmission

针对SPIHT算法抗误码性能差的缺陷,提出一种可以有效提高其抗误码性能的方法。对以完全子树方式编码后的子树码流采用EREC算法重新组织,解码过程引入自截断机制,发现违反约束关系的数据时,立即结束当前子树解码。仿真实验表明,采用该方法能够更加有效地抑制误码扩散,得到更好的抗误码性能。

Because of the SPIHT algorithms' bad error-resistance characteristic,an effective scheme is proposed to improve the robustness against communication channel errors.The code stream after the subtree algorithm is rearranged by the EREC algorithm in the coding process.In the decoding process,once a fatal error is detected in one subtree,the decoding process of this subtree is terminated.The experiment results show that this scheme can effectively prevent the error propagation so as to get a good error feature.