LDPC-BASED ITERATIVE JOINT SOURCE/CHANNEL DECODING SCHEME FOR JPEG2000
International Telemetering Conference Proceedings / October 18-21, 2004 / Town & Country Resort, San Diego, California === This paper presents a joint source-channel decoding scheme based on a JPEG2000 source coder and an LDPC channel coder. At the encoder, JPEG2000 is used to perform source cod...
| Main Authors: | , , , , |
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| Other Authors: | |
| Language: | en_US |
| Published: |
International Foundation for Telemetering
2004
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10150/605781 http://arizona.openrepository.com/arizona/handle/10150/605781 |
| Summary: | International Telemetering Conference Proceedings / October 18-21, 2004 / Town & Country Resort, San Diego, California === This paper presents a joint source-channel decoding scheme based on a JPEG2000 source coder and an LDPC channel coder. At the encoder, JPEG2000 is used to perform source coding with certain error resilience (ER) modes, and LDPC codes are used to perform channel coding. At the decoder, after one iteration of LDPC decoding, the output codestream is then decoded by JPEG2000. With the error resilience mode switches on, the source decoder detects the position of the first error within each codeblock of the JPEG2000 codestream. This information is fed back to the channel decoder, and incorporated into the calculation of likelihood values of variable nodes for the next iteration of LDPC decoding. Our results indicate that the proposed method has significant gains over conventional separate channel and source decoding. |
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