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A COVQ-Based image coder for channels with bit errors and erasures
-
- Andersson, Tomas (author)
- KTH,Kommunikationsteori,ACCESS Linnaeus Centre
-
- Skoglund, Mikael (author)
- KTH,Kommunikationsteori,ACCESS Linnaeus Centre
- (creator_code:org_t)
- IEEE Communications Society, 2008
- 2008
- English.
- In: IEEE Transactions on Communications. - : IEEE Communications Society. - 0090-6778 .- 1558-0857. ; 56:2, s. 161-165
- Journal article (peer-reviewed)
Abstract
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- We illustrate how channel optimized vector quantization (COVQ) can be used for channels with both bit-errors and bit-erasures. First, a memoryless channel model is presented, and the performance of COVQ's trained for this channel is evaluated for an i.i.d. Gaussian source. Then, the new method is applied in implementing an error-robust sub-band image coder, and we present image results that illustrate the resulting performance. Our experiments show that the new approach is able to outperform a traditional scheme based on separate source and channel coding.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Telekommunikation (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Telecommunications (hsv//eng)
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