NDLI: Interactive low-complexity codes for synchronization from deletions and insertions

Content Provider	IEEE Xplore Digital Library
Author	Venkataramanan, R. Hao Zhang Ramchandran, K.
Copyright Year	2010
Description	Author affiliation: Dept. of Electrical Engineering, Yale University, USA (Venkataramanan, R.) \|\| Dept. of Electrical Engineering & Computer Sciences, University of California, Berkeley, USA (Hao Zhang; Ramchandran, K.)
Abstract	We study the problem of synchronization of two remotely located data sources, which are mis-synchronized due to deletions and insertions. This is an important problem since a small number of synchronization errors can induce a large Hamming distance between the two sources. The goal is to effect synchronization with the rate-efficient use of lossless bidirectional links between the two sources. In this work, we focus on the following model. A binary sequence X of length n is edited to generate the sequence at the remote end, say Y, where the editing involves random deletions and insertions, possibly in small bursts. The problem is to synchronize Y with X with minimal exchange of information (in terms of both the average communication rate and the average number of interactive rounds of communication). We focus here on the case where the number of edits is much smaller than n, and propose an interactive algorithm which is computationally simple and has near-optimal communication complexity. Our algorithm works by efficiently splitting the source sequence into pieces containing either just a single deletion/insertion or a single burst deletion/insertion. Each of these pieces is then synchronized using an optimal one-way synchronization code, based on the single-deletion correcting channel codes of Varshamov and Tenengolts (VT codes).
Starting Page	1412
Ending Page	1419
File Size	309862
Page Count	8
File Format	PDF
ISBN	9781424482153
e-ISBN	9781424482160
DOI	10.1109/ALLERTON.2010.5707079
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-09-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Protocols Source coding Approximation algorithms Decoding Synchronization Channel coding
Content Type	Text
Resource Type	Article

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