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Proceedings Paper

Channel Error Effects And Error Protection For The Combined Symbol Matching Facsimile Coding System
Author(s): Wen-hsiung Chen
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Paper Abstract

The Combined Symbol Matching (CSM) facsimile coding algorithm has proven to have superior performance over any existing facsimile coding algorithm. However, as with any high performance coder, the algorithm produces an asychronous code that is susceptible to channel errors. The error effects on the source code items of CSM are not all alike nor are they always catastrophic. It is highly dependant upon which code items are perturbed by the error. The error effects are demonstrated by injecting an error onto each of the source code items. Based on these a tailored error protection scheme is derived. The tailored error protection scheme isolates the most sensitive code elements of the source codes to minimize a catastrophic loss of code word synchronization. Besides the tailored error protection scheme, a conventional forward error correction scheme and a conventional error detection scheme (ARQ scheme) are also investigated. With channel error rates of less than 10-4, the tailored error protection scheme proves to be more than adequate using a minimum of additional code bits.

Paper Details

Date Published: 11 November 1980
PDF: 9 pages
Proc. SPIE 0249, Advances in Image Transmission II, (11 November 1980); doi: 10.1117/12.959421
Show Author Affiliations
Wen-hsiung Chen, Compression Labs, Inc. (United States)


Published in SPIE Proceedings Vol. 0249:
Advances in Image Transmission II
Andrew G. Tescher, Editor(s)

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