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Joint UEP and layered source coding with application to transmission of JPEG-2000 coded images

Joint UEP and layered source coding with application to tran...

引用

IEEE Conference and Exhibition on Global Telecommunications (GLOBECOM)

作者： Tianli Chuu Zhongmin Liu Zixiang Xiong Xiaolin Wu Department of Electrical Engineering Texas A and M University College Station TX USA Department of Computer Science University of Western Ontario London ONT Canada

This paper presents a joint source-channel coding framework based on layered source coding and Reed-Solomon channel coding for unequal error protection. An iterative procedure is described to search for the best source coding rate and the optimal UEP of layered bitstreams. We apply our JSCC technique to transmission of JPEG-2000 coded images over binary symmetric channels. Compared to results reported in the literature, our UEP based approach gives better results while having lower complexity.

关键词： source coding Reed-Solomon codes Error correction codes Decoding Image reconstruction Application software Computer science Image coding Channel coding Computer errors

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Variable-Rate Distributed source coding in the Presence of Byzantine Sensors

Variable-Rate Distributed Source Coding in the Presence of B...

引用

IEEE International Symposium on Information Theory

作者： Oliver Kosut Lang Tong School of Electrical and Computer Engineering Cornell University Ithaca NY USA

ISBN: (纸本)9781424413973;1424413974

The distributed source coding problem is considered when the sensors, or encoders, are under Byzantine attack; that is, an unknown number of sensors have been reprogrammed by a malicious intruder to undermine the reconstruction at the fusion center. Three different forms of the problem are considered. The first is a variable-rate setup, in which the decoder adaptively chooses the rates at which the sensors transmit. An explicit characterization of the variable-rate minimum achievable sum rate is stated, given by the maximum entropy over the set of distributions indistinguishable from the true source distribution by the decoder. In addition, two forms of the fixed-rate problem are considered, one with deterministic coding and one with randomized coding. The achievable rate regions are given for both these problems, with a larger region achievable using randomized coding, though both are suboptimal compared to variable-rate coding.

关键词： source coding Sensor fusion Decoding Sensor phenomena and characterization Wireless sensor networks Random variables Distributed computing Entropy Communication networks Network coding

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Infinite-message distributed source coding for two-terminal interactive computing

Infinite-message distributed source coding for two-terminal ...

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Annual Allerton Conference on Communication, Control, and Computing

作者： Nan Ma Prakash Ishwar Department of Electrical and Computer Engineering Boston University Boston MA USA

ISBN: (纸本)9781424458707

A two-terminal interactive function computation problem with alternating messages is studied within the framework of distributed block source coding theory. For any arbitrary fixed number of messages, a single-letter characterization of the minimum sum-rate function was provided in previous work using traditional information-theoretic techniques. This, however, does not directly lead to a satisfactory characterization of the infinite-message limit, which is a new, unexplored dimension for asymptotic-analysis in distributed block source coding involving potentially infinitesimal-rate messages. This paper introduces a new convex-geometric approach to provide a blocklength-free single-letter characterization of the infinite-message minimum sum-rate function as a functional of the joint source pmf. This characterization is not obtained by taking a limit as the number of messages goes to infinity. Instead, it is in terms of the least element of a family of partially-ordered marginal-perturbations-concave functionals associated with the functions to be computed. For computing the Boolean AND function of two independent Bernoulli sources at one and both terminals, the respective infinite-message minimum sum-rates are characterized in closed analytic form. These sum-rates are achievable using infinitely many infinitesimal-rate messages. The convex-geometric functional viewpoint also suggests an iterative algorithm for evaluating any finite-message minimum sum-rate function.

关键词： source coding Distributed computing H infinity control Iterative algorithms Zinc Bit rate Rate-distortion Information theory

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Multiterminal source coding for Many Sensors with Entropy coding and Gaussian Process Regression

Multiterminal Source Coding for Many Sensors with Entropy Co...

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Data Compression Conference (DCC)

作者： Samuel Cheng School of Electrical and Computer Engineering University of Oklahama Tulsa OK USA

ISBN: (纸本)9781467360371

Summary form only given. In this paper, we take a different approach from the coding community. Instead of taking the usual route of quantization plus Slepian-Wolf coding, we do not perform any Slepian-Wolf coding on the transmitter side. We simply perform quantization on the sensor readings, compress the quantization indexes with conventional entropy coding, and send the compressed indexes to the receiver. On the decoder side, we simply perform entropy decoding and Gaussian process regression to reconstruct the joint source. To reduce the sum rate over all sensors, some sensors are censored and do not transmit anything to the decoder.

关键词： source coding Sensors Decoding Entropy coding Quantization (signal) Correlation

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The Rate Loss in Binary source coding with Decoder Side Information

The Rate Loss in Binary Source Coding with Decoder Side Info...

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Data Compression Conference (DCC)

作者： Andrei Sechelea Adrian Munteanu Samuel Cheng Nikos Deligiannis Vrije universiteit Brussel Brussels Belgium University of Oklahoma Tulsa Oklahoma USA

Summary form only given. Motivated by the correlation channel modeling problem in practical applications, such as distributed video coding, we study the binary source coding of a uniform source with side information, under asymmetric correlation channel assumptions. First, we consider the case where side information is available to both the encoder and decoder, and give an analytical formula for the rate-distortion bound. Then, we consider the side information to be available only to the decoder and present the derivation of the associated Wyner-Ziv rate-distortion bound. Most importantly, we characterize the evolution of the rate-loss suffered by Wyner-Ziv coding, for all possible binary asymmetric correlation channels.

关键词： Correlation Video coding Rate-distortion source coding Decoding

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On achievability of linear source coding over finite rings

On achievability of linear source coding over finite rings

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IEEE International Symposium on Information Theory

作者： Sheng Huang Mikael Skoglund Communication Theory Laboratory School of Electrical Engineering Royal Institute of Technology Stockholm Sweden

ISBN: (纸本)9781479904440

We propose using linear mappings over finite rings as encoders in the Slepian-Wolf and the source coding for computing problems. It is known that the arithmetic of many finite rings is substantially easier to implement than the one of finite fields. Hence, one of the advantages of using linear mappings over rings, instead of its field counterparts, is reducing implementation complexity. More importantly, the ring version dominates the field version in terms of achieving strictly better coding rates with strictly smaller alphabet size in the source coding for computing problem [1]. This paper is dedicated to proving an achievability theorem of linear source coding over finite rings in the Slepian-Wolf problem. This result includes those given by Elias [2] and Csiszár [3] saying that linear coding over finite fields is optimal, i.e. achieves the Slepian-Wolf region. Although the optimality issue remains open, it has been verified in various scenarios including particularly many cases use non-field rings [1], [4].

关键词： source coding Random variables Decoding Polynomials Context

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An Enhanced Covering Lemma for Multiterminal source coding

An Enhanced Covering Lemma for Multiterminal Source Coding

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2006年IEEE信息理论国际会议(Proceedings of 2006 IEEE Information Theory Workshop ITW'06)

作者： Shengtian Yang Peiliang Qiu Department of Information Science & Electronic Engineering Zhejiang University Hangzhou Zhejiang 310027 China

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 *** on the enhanced lemma, a sufficient and necessary condition for determining the achievability of rate-distortion triples is given.

关键词： source coding Decoding Rate-distortion Information theory Conferences Information science Sufficient conditions Random variables Tin Distortion measurement

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On the rate distortion region of Gaussian multiterminal source coding

On the rate distortion region of Gaussian multiterminal sour...

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International Symposium on Information Theory and Its Applications, ISITA

作者： Yasutada Oohama Department of Information Science and Intelligent Systems University of Tokushima Tokushima Japan

We consider the distributed source coding system of L correlated Gaussian sources Y i , i = 1,2, ⋯, L. We assume that Y L = t (Y 1 , Y 2 , ⋯, Y L ) is an observation of the remote source vector X L = t (X 1 , X 2 , ⋯, X L ), having the form Y L = X K + N L , where N L = t (N 1 , N 2 , ···, N L ) is a vector of L independent Gaussian random variables also independent of X L . In this system L correlated Gaussian observations are separately compressed by L encoders and sent to the information processing center. In this paper, we study the multiterminal source coding problem where the decoder wishes to reconstruct the observation Y L = X L +N L . We consider three distortion criteria based on the covariance matrix of the estimation error on Y L . For each of those three criteria we derive explicit inner and outer bounds of the rate distortion region.

关键词： source coding Covariance matrix Rate-distortion Random variables Decoding Estimation error Information processing

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Interlace coding system to avoid error propagation of source coding systems

Interlace coding system to avoid error propagation of source...

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Wireless Communications Conference

作者： T. Yamazato I. Sasase S. Mori Department of Electrical Engineering Keio University Yokohama Japan

An interlace coding system to avoid error propagation of source coding systems is proposed and its error performance on additive white Gaussian noise (AWGN) channel with quadrature phase shift keying (QPSK) is analyzed. The proposed system handles data compression, data encryption and error correcting processes together, i.e. adds error correcting redundancy to the block lists of the dictionary which the compression system constructs to reduce source redundancy. The authors found that the catastrophic condition depends only on the size of the dictionary for the proposed system. Thus, by employing a large dictionary, good error performance can be obtained by the proposed system and the catastrophic condition can be avoided.< >

关键词： source coding AWGN Dictionaries Quadrature phase shift keying Error correction Redundancy Additive white noise Performance analysis Data compression Cryptography

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Motion video coding in CCITT SG XV-the video source coding

Motion video coding in CCITT SG XV-the video source coding

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IEEE Global Telecommunications Conference and Exhibition. Communications for the Information Age

作者： R. Plompen Y. Hatori W. Geuen J. Guichard M. Guglielmo H. Brusewitz Dr. Neher Laboratories Netherlands Kokusai Denshin Denwa Company Limited Japan Forschungsinstitut Deutschen Bundespost FL USA Centre National d''Etudes des Télémmunications France Centro Studi e Laboratori Telecommunicazioni S. p. A. Italy Swedish Telecom Administration STA Sweden

A description is given of studies of source coding in the specialists group on coding for visual telephony in CCITT SG XV. Using a macro block approach, the source coding algorithm will have the capability of operating from 64 kb/s for videophone applications up to 2 Mb/s for high-quality videoconferencing applications. The authors describe the existing reference model and the evolution toward the latest reference model (RM5), which is going to be submitted for standardization. Theoretical information is provided and some examples for possible improvements are presented for the most important techniques used in the reference model, among which are quantization, variable block size, scanning classes, loop filter, entropy coding, multiple vs. single variable-length coding, and block-type discrimination.< >

关键词： Video coding source coding Video codecs Telephony Standardization Laboratories Pulse modulation Technical drawing Europe Hardware

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