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Near-Lossless Compression and Protection by Turbo Source-Channel (De-)Coding Using Irregular Index Assignments

Authors:

Laurent Schmalen and Peter Vary

Book Title:

Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

Venue:

Taipei, Taiwan

Organization:

IEEE

Date:

Apr. 2009

Pages:

2485–2488

ISBN:

978-1-42442-354-5

Language:

English

Abstract

In this paper, we present a novel near-lossless compression scheme for scalar-quantized source codec parameters. The scheme is comparable to a Turbo source coding approach and can inherently incorporate protection against transmission errors. We show that using the concept of EXIT charts and irregular codes, a linear programming optimization problem can be formulated and the solution of this problem leads to an irregular index assignment offering the best possible compression given the considered system model and a fixed channel quality. The performance of the compression scheme is demonstrated by a simulation example.

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