Universal Quadratic Lower Bounds on Source Coding Error Exponents
Universal Quadratic Lower Bounds on Source Coding Error Exponents
复制标题
源编码误差指数的通用二次下界
DOI:
10.1109/ciss.2007.4298398
复制
发表时间:
2007
期刊:
影响因子:
--
通讯作者:
A. Sahai
中科院分区:
文献类型:
--
作者:
Cheng Chang;A. Sahai
We consider the problem of block-size selection to achieve a desired probability of error for universal source coding. While Baron, et al. (2004; 1973) studied this question for rates in the vicinity of entropy for known distributions using central-limit-theorem techniques, we are interested in all rates for unknown distributions and use error-exponent techniques. By adapting a technique of Gallager from the exercises of Gallager (1971), we derive a universal lower bound to the source-coding error exponent that depends only on the alphabet size and is quadratic in the gap to entropy.