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Optimal prefix codes are studied for pairs of independent, integer-valued symbols emitted by a source with a geometric probability distribution of parameter $q$, $0{<}q{<}1$. By encoding pairs of symbols, it is possible to reduce the…

信息论 · 计算机科学 2013-01-08 Frédérique Bassino , Julien Clément , Gadiel Seroussi , Alfredo Viola

We construct constant-sized ensembles of linear error-correcting codes over any fixed alphabet that can correct a given fraction of adversarial erasures at rates approaching the Singleton bound arbitrarily closely. We provide several…

信息论 · 计算机科学 2025-04-07 Yeyuan Chen , Mahdi Cheraghchi , Nikhil Shagrithaya

We introduce synchronization strings as a novel way of efficiently dealing with synchronization errors, i.e., insertions and deletions. Synchronization errors are strictly more general and much harder to deal with than commonly considered…

信息论 · 计算机科学 2017-04-05 Bernhard Haeupler , Amirbehshad Shahrasbi

In a digital communication system, information is sent from one place to another over a noisy communication channel. It may be possible to detect and correct errors that occur during the transmission if one encodes the original information…

信息论 · 计算机科学 2017-08-21 Banu Kabakulak , Z. Caner Taşkın , Ali Emre Pusane

We classify all binary error correcting completely regular codes of length $n$ with minimum distance $\delta>n/2$.

组合数学 · 数学 2014-04-08 Neil I. Gillespie

This paper computationally obtains optimal bounded-weight, binary, error-correcting codes for a variety of distance bounds and dimensions. We compare the sizes of our codes to the sizes of optimal constant-weight, binary, error-correcting…

信息论 · 计算机科学 2007-10-15 Russell Bent , Michael Schear , Lane A. Hemaspaandra , Gabriel Istrate

Pliable index coding considers a server with m messages, and n clients where each has as side information a subset of the messages. We seek to minimize the number of transmissions the server should make, so that each client receives (any)…

信息论 · 计算机科学 2016-01-22 Linqi Song , Christina Fragouli

We obtain a new protocol for binary counting in the $\varepsilon$-shuffle-DP model with error $O(1/\varepsilon)$ and expected communication $\tilde{O}\left(\frac{\log n}{\varepsilon}\right)$ messages per user. Previous protocols incur…

数据结构与算法 · 计算机科学 2023-05-30 Badih Ghazi , Ravi Kumar , Pasin Manurangsi

In distributed learning, the goal is to perform a learning task over data distributed across multiple nodes with minimal (expensive) communication. Prior work (Daume III et al., 2012) proposes a general model that bounds the communication…

机器学习 · 计算机科学 2012-04-17 Hal Daume , Jeff M. Phillips , Avishek Saha , Suresh Venkatasubramanian

Error-Correcting Output Codes (ECOCs) offer a principled approach for combining simple binary classifiers into multiclass classifiers. In this paper, we investigate the problem of designing optimal ECOCs to achieve both nominal and…

机器学习 · 计算机科学 2020-11-03 Samarth Gupta , Saurabh Amin

In this work, we study linear error-correcting codes against adversarial insertion-deletion (insdel) errors, a topic that has recently gained a lot of attention. We construct linear codes over $\mathbb{F}_q$, for…

信息论 · 计算机科学 2022-01-19 Roni Con , Amir Shpilka , Itzhak Tamo

Insertion and deletion (insdel for short) errors are synchronization errors in communication systems caused by the loss of positional information in the message. Reed-Solomon codes have gained a lot of interest due to its encoding…

信息论 · 计算机科学 2019-12-06 Tai Do Duc , Shu Liu , Ivan Tjuawinata , Chaoping Xing

Graph spanners are fundamental graph structures with a wide range of applications in distributed networks. We consider a standard synchronous message passing model where in each round $O(\log n)$ bits can be transmitted over every edge (the…

数据结构与算法 · 计算机科学 2017-08-15 Ofer Grossman , Merav Parter

Explicit non-asymptotic upper bounds on the sizes of multiple-deletion correcting codes are presented. In particular, the largest single-deletion correcting code for $q$-ary alphabet and string length $n$ is shown to be of size at most…

信息论 · 计算机科学 2012-11-15 Ankur A. Kulkarni , Negar Kiyavash

We study near optimal error correction codes for real-time communication. In our setup the encoder must operate on an incoming source stream in a sequential manner, and the decoder must reconstruct each source packet within a fixed playback…

信息论 · 计算机科学 2013-05-16 Ahmed Badr , Ashish Khisti , Wai-Tian Tan , John Apostolopoulos

We initiate the theoretical study of directory reconciliation, a generalization of document exchange, in which Alice and Bob each have different versions of a set of documents that they wish to synchronize. This problem is designed to…

数据结构与算法 · 计算机科学 2018-07-26 Michael Mitzenmacher , Tom Morgan

Edit distance is an important measure of string similarity. It counts the number of insertions, deletions and substitutions one has to make to a string $x$ to get a string $y$. In this paper we design an almost linear-size sketching scheme…

数据结构与算法 · 计算机科学 2024-06-18 Michal Koucký , Michael Saks

Random selection, leader election, and collective coin flipping are fundamental tasks in fault-tolerant distributed computing. We study these problems in the full-information model where despite decades of study, key gaps remain in our…

计算复杂性 · 计算机科学 2026-04-30 Eshan Chattopadhyay , Mohit Gurumukhani , Noam Ringach , Rocco A. Servedio

This paper presents new lower and upper bounds for the compression rate of binary prefix codes optimized over memoryless sources according to various nonlinear codeword length objectives. Like the most well-known redundancy bounds for…

信息论 · 计算机科学 2010-10-08 Michael B. Baer

Despite their significant advantages over competing technologies, nanopore sequencers are plagued by high error rates, due to physical characteristics of the nanopore and inherent noise in the biological processes. It is thus paramount not…

信息论 · 计算机科学 2025-10-27 Anisha Banerjee , Yonatan Yehezkeally , Antonia Wachter-Zeh , Eitan Yaakobi