Error resilient image coding with rate-compatible punctured convolutional codes

In this paper, we describe an application of the rate-compatible punctured convolutional (RCPC) channel codes to an error-resilient image compression scheme with variable-coefficient fixed-length (VCFL) source codes. The VCFL source coder is error resilient because of its fixed length of the codes....

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Vydané v:1998 IEEE International Symposium on Circuits and Systems Ročník 4; s. 110 - 113 vol.4
Hlavní autori: Jianfei Cai, Chang Wen Chen, Zhaohui Sun
Médium: Konferenčný príspevok..
Jazyk:English
Vydavateľské údaje: IEEE 1998
Predmet:
Bit rate
Channel coding
Convolutional codes
Decoding
Error correction codes
Image coding
Image quality
Image reconstruction
Redundancy
Wavelet transforms
ISBN:9780780344556, 0780344553
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Popis
Shrnutí:In this paper, we describe an application of the rate-compatible punctured convolutional (RCPC) channel codes to an error-resilient image compression scheme with variable-coefficient fixed-length (VCFL) source codes. The VCFL source coder is error resilient because of its fixed length of the codes. Since it is based on wavelet transform, the scheme provides us with a hierarchical structure of the source codes to facilitate the unequal error protection by the channel codes. We adopt the RCPC codes for channel coding to achieve three goals: (1) unequal error protection, (2) single channel decoder with multiple rate compatibility, (3) minimizing controlled overhead redundancy. Preliminary results show that, with slightly higher bit rate, we can achieve better reconstructed image quality under at least an order of magnitude higher channel bit error rate.
ISBN:9780780344556
0780344553
DOI:10.1109/ISCAS.1998.698770