arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0710.1949cs.ITmath.IT
收藏

基于连续值同步的分布式信源编码

Distributed Source Coding Using Continuous-Valued Syndromes

Lorenzo Cappellari

摘要:

本文讨论了一个连续的随机源与另一个源,这是唯一可用的解码器的编码问题。所提出的方法是基于扩展的信道编码的概念,从离散到连续域的综合征。如果源之间的相关性可以描述由一个加性高斯后向信道和容量实现的线性码,它表明,系统的性能是渐近接近Wyner-Ziv界。即使这样的加性信道不是高斯的,设计过程也可以适合期望的相关性和传输速率。基于网格编码量化的实验表明,在0.5-3 bit/采样率范围内,对于任意高斯相关,该系统的性能在理论界的3-4 dB之内,具有合理的计算复杂性。

英文摘要:

This paper addresses the problem of coding a continuous random source correlated with another source which is only available at the decoder. The proposed approach is based on the extension of the channel coding concept of syndrome from the discrete into the continuous domain. If the correlation between the sources can be described by an additive Gaussian backward channel and capacity-achieving linear codes are employed, it is shown that the performance of the system is asymptotically close to the Wyner-Ziv bound. Even if such an additive channel is not Gaussian, the design procedure can fit the desired correlation and transmission rate. Experiments based on trellis-coded quantization show that the proposed system achieves a performance within 3-4 dB of the theoretical bound in the 0.5-3 bit/sample rate range for any Gaussian correlation, with a reasonable computational complexity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑