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2018
Journal Articles
Koch, Tobias ; Vazquez-Vilar, Gonzalo

A Rigorous Approach to High-Resolution Entropy-Constrained Vector Quantization Journal Article

IEEE Transactions on Information Theory, 64 (4), pp. 2609-2625, 2018 , ISSN: 0018-9448 .

Links | BibTeX | Tags: Distortion , Distortion measurement , Entropy , Entropy constrained , high resolution , Probability density function , quantization , Rate-distortion , Rate-distortion theory , Vector quantization

@article{koch-TIT2018a,
title = {A Rigorous Approach to High-Resolution Entropy-Constrained Vector Quantization},
author = {Koch, Tobias and Vazquez-Vilar, Gonzalo},
doi = {10.1109/TIT.2018.2803064},
issn = {0018-9448},
year = {2018},
date = {2018-04-01},
journal = {IEEE Transactions on Information Theory},
volume = {64},
number = {4},
pages = {2609-2625},
keywords = {Distortion, Distortion measurement, Entropy, Entropy constrained, high resolution, Probability density function, quantization, Rate-distortion, Rate-distortion theory, Vector quantization},
pubstate = {published},
tppubtype = {article}
}

2016
Journal Articles
Koch, Tobias

The Shannon Lower Bound Is Asymptotically Tight Journal Article

IEEE Transactions on Information Theory, 62 (11), pp. 6155–6161, 2016 , ISSN: 0018-9448 .

Abstract | Links | BibTeX | Tags: Journal , Rate-distortion theory , R{é}nyi information dimension , Shannon lower bound

@article{Koch2016b,
title = {The Shannon Lower Bound Is Asymptotically Tight},
author = {Koch, Tobias},
url = {http://ieeexplore.ieee.org/document/7556344/},
doi = {10.1109/TIT.2016.2604254},
issn = {0018-9448},
year = {2016},
date = {2016-11-01},
journal = {IEEE Transactions on Information Theory},
volume = {62},
number = {11},
pages = {6155--6161},
abstract = {The Shannon lower bound is one of the few lower bounds on the rate-distortion function that holds for a large class of sources. In this paper, which considers exclusively norm-based difference distortion measures, it is demonstrated that its gap to the rate-distortion function vanishes as the allowed distortion tends to zero for all sources having finite differential entropy and whose integer part has finite entropy. Conversely, it is demonstrated that if the integer part of the source has infinite entropy, then its rate-distortion function is infinite for every finite distortion level. Thus, the Shannon lower bound provides an asymptotically tight bound on the rate-distortion function if, and only if, the integer part of the source has finite entropy.},
keywords = {Journal, Rate-distortion theory, R{é}nyi information dimension, Shannon lower bound},
pubstate = {published},
tppubtype = {article}
}

The Shannon lower bound is one of the few lower bounds on the rate-distortion function that holds for a large class of sources. In this paper, which considers exclusively norm-based difference distortion measures, it is demonstrated that its gap to the rate-distortion function vanishes as the allowed distortion tends to zero for all sources having finite differential entropy and whose integer part has finite entropy. Conversely, it is demonstrated that if the integer part of the source has infinite entropy, then its rate-distortion function is infinite for every finite distortion level. Thus, the Shannon lower bound provides an asymptotically tight bound on the rate-distortion function if, and only if, the integer part of the source has finite entropy.