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Joint Source Channel Coding Using Arithmetic Codes

Name: Joint Source Channel Coding Using Arithmetic Codes
Brand: Springer International Publishing AG
SKU: 9783031005473
Price: 136.71 RON
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Autor: Michael Hoffman, Khalid Sayood

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Editura: Springer International Publishing AG

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Based on the encoding process, arithmetic codes can be viewed as tree codes and current proposals fo...

Informații despre carte

Autor

Michael Hoffman, Khalid Sayood

Limbă

engleză

Legare

Carte - Carte broșată

Publicat

2009

Pagini

EAN

9783031005473

ISBN

3031005473

Enbook ID

39298155

Editura

Springer International Publishing AG

Greutate

172

Dimensiuni

191 x 235 x 5

Descriere completă

Based on the encoding process, arithmetic codes can be viewed as tree codes and current proposals for decoding arithmetic codes with forbidden symbols belong to sequential decoding algorithms and their variants. In this monograph, we propose a new way of looking at arithmetic codes with forbidden symbols. If a limit is imposed on the maximum value of a key parameter in the encoder, this modified arithmetic encoder can also be modeled as a finite state machine and the code generated can be treated as a variable-length trellis code. The number of states used can be reduced and techniques used for decoding convolutional codes, such as the list Viterbi decoding algorithm, can be applied directly on the trellis. The finite state machine interpretation can be easily migrated to Markov source case. We can encode Markov sources without considering the conditional probabilities, while using the list Viterbi decoding algorithm which utilizes the conditional probabilities. We can also use context-based arithmetic coding to exploit the conditional probabilities of the Markov source and apply a finite state machine interpretation to this problem.The finite state machine interpretation also allows us to more systematically understand arithmetic codes with forbidden symbols. It allows us to find the partial distance spectrum of arithmetic codes with forbidden symbols. We also propose arithmetic codes with memories which use high memory but low implementation precision arithmetic codes. The low implementation precision results in a state machine with less complexity. The introduced input memories allow us to switch the probability functions used for arithmetic coding. Combining these two methods give us a huge parameter space of the arithmetic codes with forbidden symbols. Hence we can choose codes with better distance properties while maintaining the encoding efficiency and decoding complexity. A construction and search method is proposed and simulation results show that we can achieve a similar performance as turbo codes when we apply this approach to rate 2/3 arithmetic codes.Table of Contents: Introduction / Arithmetic Codes / Arithmetic Codes with Forbidden Symbols / Distance Property and Code Construction / Conclusion

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Joint Source Channel Coding Using Arithmetic Codes

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