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Generalized Communication System: Error Control Coding Occurs In Right Column.

Generalized Communication System: Error Control Coding Occurs In Right Column.

Generalized Communication System: Error Control Coding Occurs In Right Column. Message Bits. Codeword: message and parity bits. For Example, H here has three parity checks on the 6 codeword bits:. Robert Gallagher, 1963: Low Density Parity Check Codes.

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543 views • 54 slides
FEC Linear Block Coding

FEC Linear Block Coding

FEC Linear Block Coding. Matthew Pregara & Zachary Saigh Advisors: Dr. In Soo Ahn & Dr. Yufeng Lu Dept. of Electrical and Computer Eng. Table of Contents. Motivation Introduction Hamming Code Example Tanner Graph/Hard Decision Decoding Simulink Simulation on Hamming Code

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613 views • 37 slides
Writing on Wet Paper

Writing on Wet Paper

Writing on Wet Paper. IEEE Transactions on Signal Processing, Vol. 53, Issue 10, Part 2, Oct. 2005 by Jessica Fridrich, Miroslav Goljan, Petr Lisonek and David Soukal. Outlines. Introduction Wet Paper Code Practical Wet Paper Code Experiment. Introduction.

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470 views • 29 slides
Chapter Nine: Data Transmission

Chapter Nine: Data Transmission

Chapter Nine: Data Transmission. Introduction. Binary data is transmitted by either by serial or parallel methods Data transmission over long distances is usually done by serial means. Data Coding. Data coding techniques are used to convert alphanumeric characters into binary numbers

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330 views • 22 slides
Digital Image Steganalysis

Digital Image Steganalysis

Digital Image Steganalysis. Kwang-Soo Lee. Outline. Steganography LSB Steganography LSB Steganalysis. Cryptography. Cryptography scrambles a message to obscure its meaning. Today secure communication is often identified with cryptography.

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153 views • 14 slides
Linear-time encodable and decodable error-correcting codes Daniel A. Spielman

Linear-time encodable and decodable error-correcting codes Daniel A. Spielman

Linear-time encodable and decodable error-correcting codes Daniel A. Spielman. Presented by Tian Sang Jed Liu 2003 March 3rd. Error-Reduction Codes. Weaker than error-correcting codes Can remove most of the errors, if not too many message bits and check bits are corrupted Definition

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297 views • 12 slides
Synchronous Links/Networks

Synchronous Links/Networks

Synchronous Links/Networks. Modems are asynchronous - penalized by start bits and stop bits on each character (and dead time) Synchronous Networks recover clock timing using sync characters. Network Topologies. To other Control Stations in Distributed Network. Leased/ Dedicated Lines

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156 views • 7 slides
VSH, an efficient and provable collision resistant hash function

VSH, an efficient and provable collision resistant hash function

VSH, an efficient and provable collision resistant hash function. Scott Contini 1 , Arjen K. Lenstra 2 , Ron Steinfeld 1 1 Macquarie University 2 Lucent Technologies Bell Laboratories, Technical Univ. Eindhoven. As usual in crypto, we cheat. Efficient means:

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168 views • 7 slides
Annual Conference of ITA ACITA 2009

Annual Conference of ITA ACITA 2009

C. C. C. C. F. F. F. F. Annual Conference of ITA ACITA 2009. H[m]. Bob. Alice. H[m]. H AE [m]. H EB [m]. H BE [m]. H EA [m]. Bootstrapping Coalition MANETs: Physical-Layer Security under Active Adversary. Murtaza A. Zafer, Dakshi Agrawal and Mudhakar Srivatsa

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138 views • 1 slides

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