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Unequal Error Protection: An Information-Theoretic Perspective
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Date
2009-12-01
Author
Borade, Shashi
Nakiboğlu, Barış
Zheng, Lizhong
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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An information-theoretic framework for unequal error protection is developed in terms of the exponential error bounds. The fundamental difference between the bit-wise and message-wise unequal error protection (UEP) is demonstrated, for fixed-length block codes on discrete memoryless channels (DMCs) without feedback. Effect of feedback is investigated via variable-length block codes. It is shown that, feedback results in a significant improvement in both bit-wise and message-wise UEPs (except the single message case for missed detection). The distinction between false-alarm and missed-detection formalizations for message-wise UEP is also considered. All results presented are at rates close to capacity.
Subject Keywords
Block codes
,
Blowing-up lemma
,
Error exponents
,
False alarm
,
Feedback
,
Missed detection
,
Unequal error protection (UEP)
,
Variable-length block coding
URI
https://hdl.handle.net/11511/37229
Journal
IEEE TRANSACTIONS ON INFORMATION THEORY
DOI
https://doi.org/10.1109/tit.2009.2032819
Collections
Department of Electrical and Electronics Engineering, Article