Publications – Details
Turbo Source Compression with Jointly Optimized Inner Irregular and Outer Irregular Codes
- Authors:
- Laurent Schmalen, Peter Vary, Thorsten Clevorn, and Marc Adrat
- Book Title:
- Proceedings of IEEE Vehicular Technology Conference (VTC-Fall)
- Venue:
- Ottawa, Canada
- Event Date:
- 6.-9.9.2010
- Organization:
- IEEE
- Date:
- Sept. 2010
- ISBN:
- 978-1-42443-573-9
- ISSN:
- 1090-3038
- URL:
- 10.1109/VETECF.2010.5594217
- Language:
- English
Abstract
In this paper, we present a near-lossless compression scheme for scalar-quantized source codec parameters based on iterative source-channel decoding (ISCD). The scheme is comparable to a Turbo source coding approach and can inherently incorporate protection against transmission errors. In order to realize a close-to-capacity transmission/compression scheme, we employ irregular redundant bit mappings and irregular inner channel codes. The irregular inner code is composed of (pseudo) randomly punctured convolutional codes of rate > 1, i.e., the compression is performed by strong puncturing of the inner code. The optimization goal is a minimum number of transmitted bits given certain source and channel conditions. We show how the inner and outer component can be jointly optimized resulting in a constrained nonlinear programming problem. Simulation examples show the advantage over systems employing only a single irregular component.
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