362 research outputs found
An Enhanced Covering Lemma for Multiterminal Source Coding
An enhanced covering lemma for a Markov chain is proved in this paper, and
then the distributed source coding problem of correlated general sources with
one average distortion criterion under fixed-length coding is investigated.
Based on the enhanced lemma, a sufficient and necessary condition for
determining the achievability of rate-distortion triples is given.Comment: To appear in Proc. 2006 IEEE Information Theory Workshop, October
22-26, 2006, Chengdu, China. (5 pages
Secret Key Agreement from Correlated Gaussian Sources by Rate Limited Public Communication
We investigate the secret key agreement from correlated Gaussian sources in
which the legitimate parties can use the public communication with limited
rate. For the class of protocols with the one-way public communication, we show
a closed form expression of the optimal trade-off between the rate of key
generation and the rate of the public communication. Our results clarify an
essential difference between the key agreement from discrete sources and that
from continuous sources.Comment: 9 pages, no figure, Version 2 is a published version. The results are
not changed from version 1. Explanations are polishe
The Likelihood Encoder for Lossy Compression
A likelihood encoder is studied in the context of lossy source compression.
The analysis of the likelihood encoder is based on the soft-covering lemma. It
is demonstrated that the use of a likelihood encoder together with the
soft-covering lemma yields simple achievability proofs for classical source
coding problems. The cases of the point-to-point rate-distortion function, the
rate-distortion function with side information at the decoder (i.e. the
Wyner-Ziv problem), and the multi-terminal source coding inner bound (i.e. the
Berger-Tung problem) are examined in this paper. Furthermore, a non-asymptotic
analysis is used for the point-to-point case to examine the upper bound on the
excess distortion provided by this method. The likelihood encoder is also
related to a recent alternative technique using properties of random binning
- …