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IEEE International Symposium on Information Theory

作者： R.J. Barron Brian Chen G.W. Wornell Department EECS Massachusetts Institute of Technology Cambridge MA USA

A formal duality between the information embedding (data hiding) problem and the Wyner-Ziv problem of source coding with decoder side information is developed, including results for the quadratic Gaussian and binary-s... 详细信息

ISBN: (纸本)0780371232

关键词： source coding Decoding Lattices Memoryless systems Equations Distortion measurement Rate-distortion Data encapsulation Robustness Information retrieval

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Two-way source coding through a relay

Two-way source coding through a relay

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IEEE International Symposium on Information Theory

作者： Han-I Su Abbas El Gamal Department of Electrical Engineering University of Stanford Stanford CA USA

A 3-node lossy source coding problem for a 2-DMS (X 1 , X 2 ) is considered. source nodes 1 and 2 observe X 1 and X 2 , respectively, and each wishes to reconstruct the other source with a prescribed distortion. To achieve these goals, nodes 1 and 2 send descriptions of their sources to relay node 3. The relay node then broadcasts a joint description to the source nodes. A cutset outer bound and a compress-linear code inner bound are established and shown to coincide in several special cases. A compute-compress inner bound is then presented and shown to outperform the compress-linear code in some cases. An outer bound based on Kaspi's converse for the two-way source coding problem is shown to be strictly tighter than the cutset outer bound.

关键词： source coding Relays Network coding Rate-distortion Binary sequences Satellite broadcasting Wireless communication Satellite communication Channel coding Routing

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Lossy source coding of Binary Memoryless source by Trained LDGM Encoder

Lossy Source Coding of Binary Memoryless Source by Trained L...

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International Symposium on Information Theory and Its Applications, ISITA

作者： Kazuki Ogawa Hiromu Takata Motohiko Isaka Dept. of Informatics Graduate School of Science and Technology Kwansei Gakuin University Sanda Japan Dept. of Computer Science School of Engineering Kwansei Gakuin University Sanda Japan

ISBN: (数字)9784885523410

ISBN: (纸本)9781665499071

Use of low-density generator matrix codes as codebook and encoding with message-passing algorithm is an efficient approach for lossy coding of the i.i.d. binary source. We propose lossy source encoder which is trained on the associated unfolded Tanner graph for improving the rate-distortion performance and/or reducing computational cost.

关键词： Codes source coding Rate-distortion Generators Computational efficiency

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Interplay Between Routing and Distributed source coding in Wireless Sensor Network

Interplay Between Routing and Distributed Source Coding in W...

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IEEE International Conference on Communications (ICC)

作者： H. Wang D. Peng W. Wang H. Sharif H.-H. Chen Department of Computer and Electronics Engineering University of Nebraska Lincoln Omaha NE USA Institute of Communications Engineering National Sun Yat-Sen University Kaohsiung Taiwan

Recent advances in distributed source coding (DSC) for mission-driven wireless sensor networks (WSN) are related to the coding for multiple correlated sensors in applications such as real time target tracking and environment monitoring. The characteristic of these DSC applications provides significant potential opportunities in the associated sensor network to utilize multirate transmissions for enhancing network performance. In this paper, we study a methodology for interplay optimization between routing and DSC in WSN, and propose a novel multirate based routing scheme for mission-driven DSC applications that considerably extends network lifetime. The proposed scheme adopts the rate assignment based on the residual energy, and employs a joint rate and energy scheduling mechanism to meet the end-to-end transmission rate constraint, information precision requirement, and the energy constraints in the network for DSC. Simulation results show that this multirate based routing scheme achieves significantly longer network lifetime compared to other existing research in WSN for DSC applications.

关键词： Routing source coding Wireless sensor networks Energy efficiency Sensor phenomena and characterization Optimization methods Video signal processing Signal processing Wireless LAN Communications Society

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On Variable Length source coding Under Epsilon-fidelity Criterion

On Variable Length Source Coding Under Epsilon-fidelity Crit...

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IEEE International Symposium on Information Theory

作者： H. Sato Institute of Information Science Senshu University Kawasaki Japan

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Investigating Applications of Run Length Encoding in Data Compression & source coding

Investigating Applications of Run Length Encoding in Data Co...

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International Conference on Computing and Networking Technology (ICCNT)

作者： Aruna Sri Rongali Dharmesh Dhabliya Ishaan Pandey Ankit Sachdeva Hirald Dwaraka Praveena Shibani C Aich Department Information Technology University of The Cumberlands US Department of Information Technology Vishwakarma Institute of Technology Pune Maharashtra India Computer Science BML Munjal University Gurgaon Haryana India Centre of Research Impact and Outcome Chitkara University Rajpura Punjab India Department of ECE Mohan Babu University Tirupati Andhra Pradesh India Department of English Amrita Vishwa Vidyapeetham Amritapuri India

ISBN: (数字)9798350370249

ISBN: (纸本)9798350370270

Run period Encoding (RLE) is a powerful and efficient approach for fact compression and supply coding. It is generally applied to the lossless compression of grayscale or bi-tonal (black-and-white) photos and digital pix. Significantly, RLE decreases the statistics required to save and transmit virtual facts. That is completed by making the information greater compact and casting off redundancy. Typically, RLE counts the number of consecutive occurrences of a given image or sign and then encodes those occurrences into an unmarried cost. By encoding multiple repetitions of a symbol in this manner, RLE can reduce the entire quantity of statistics wanted for garage or transmission. The RLE set of rules works by looking for long strings of characters that may be compressed into fewer characters. Exploring the potential packages of RLE in supply coding and records compression is an ongoing study subject matter within the area.

关键词： Casting Image coding Costs source coding Redundancy Symbols Gray-scale Huffman coding

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Joint source/channel coding using arithmetic codes

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IEEE TRANSACTIONS ON COMMUNICATIONS 2001年第5期49卷 826-836页

作者： Pettijohn, BD Hoffman, MW Sayood, K Lockheed Martin Management & Data Syst San Jose CA 95134 USA Univ Nebraska Dept Elect Engn Lincoln NE 68588 USA

Reserving space for a symbol that is not in the source alphabet has been shown to provide excellent error detection. In this paper, we show how to exploit this capability using two sequential decoder structures to provide powerful error correction capability. This joint source/channel coder design provides significant packet loss recovery with minimal rate overhead, and compares favorably with conventional schemes.

关键词： arithmetic codes error correction source coding variable length codes

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Efficient source coding for Narrowband Wireless Voice Communication: Development and Simulation Analysis

Efficient Source Coding for Narrowband Wireless Voice Commun...

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International Conference on Computing and Networking Technology (ICCNT)

作者： Divyank Mittal Gopal Agarwal Nawaj Shikalgar Sushil Kumar Bahuguna S. Mukhopadhyay RCnD E&IG BARC Trombay Mumbai India CnID E&IG BARC Trombay Mumbai India E&IG BARC Trombay Mumbai India

ISBN: (数字)9798350370249

ISBN: (纸本)9798350370270

This paper explores different encoding methods for speech signals and provides a methodology for a narrowband speech waveform with a targeted bandwidth of less than 25 kHz. This waveform could be used in any standard reconfigurable radio system. The paper also explores the effectiveness of different source encoding techniques for speech and audio signals, and also considering effects of different source coding techniques on signal quality and bandwidth utilization. The proposed methodology for the narrowband speech waveform emphasizes on optimizing resources while maintaining a targeted bandwidth requirement under $25 \mathbf{k H z}$. Different encoding schemes for speech have been studied and different parameters such as SNR, compression ratio and encoding decoding time has been calculated using mathematical simulation software. Few of the promising schemes have been simulated with entire narrowband waveform and their performance within the specified targeted bandwidth has been assessed at different bit error rate introduced by channel.

关键词： Wireless communication Speech coding source coding Simulation Bit error rate Software Speech processing Standards Narrowband Software radio

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Rescuing Tit-for-Tat with source coding

Rescuing Tit-for-Tat with Source Coding

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International Conference on Peer-to-Peer Computing

作者： Thomas Locher Stefan Schmid Roger Wattenhofer Computer Engineering and Networks Laboratory (TIK) ETH Zurich Zurich Switzerland

Tit-for-tat is widely believed to be the most effective strategy to enforce collaboration among selfish users. However, it has been shown that its usefulness for decentralized and dynamic environments such as peer-to-peer networks is marginal, as peers can rapidly end up in a deadlock situation. Many proposed solutions to this problem are either less resilient to freeloading behavior or induce a computational overhead that cannot be sustained by regular peers. In contrast, we retain tit-for-tat, but enhance the system with a novel form of source coding and an effective scheme to prevent peers from freeloading from seeding peers. We show that our system performs well without the risk of peer starvation and without sacrificing fairness. The proposed solution has a reasonably low overhead, and may hence be suitable for fully distributed content distribution applications in real networks.

关键词： source coding Peer to peer computing Computer networks Laboratories International collaboration System recovery Centralized control System performance Acceleration Distributed computing

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A probabilistic approach to some asymptotics in source coding

A probabilistic approach to some asymptotics in source codin...

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Compression and Complexity of Sequences Proceedings

作者： S.A. Savari Bell Laboratories Lucent Technologies Inc. Murray Hill NJ USA

Renewal theory is a powerful tool in the analysis of source codes. In this paper, we use renewal theory to obtain some asymptotic properties of finite-state noiseless channels. We discuss the relationship between these results and earlier uses of renewal theory to analyze the Lempel-Ziv codes and the Tunstall code. As a new application of our results, we provide a simple derivation of the asymptotic performance of the prefix condition code that minimizes the average transmission cost when the source symbols are equiprobable.

关键词： source coding Costs Information theory Channel capacity Magnetic devices Telegraphy Magnetic noise Eigenvalues and eigenfunctions

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