Title :
A Joint Iterative Decoding Scheme in Wireless Image Transmission System
Author :
Bai, Xu ; Cui, Yang ; Zhang, Zhong-zhao ; Wu, Shao-Chuan
Author_Institution :
Commun. Res. Center, Harbin Inst. of Technol., Harbin, China
Abstract :
A joint source-channel decoding (JSCD) method are designed in real-time wireless image transmission system, JPEG2000 is used to perform source coding with certain error-resilience modes, and a regular low-density parity-check (LDPC) code is selected as the channel error correcting code. During decoding, the error detecting information from source decoder feedback to channel decoder which update the log-likelihood ratio (LLR) of partial codeword bits. Simulation results show that the JSCD scheme can accelerate the iterative procedure, and improve the PSNR of reconstructed images.
Keywords :
combined source-channel coding; data compression; error correction codes; image coding; image reconstruction; iterative decoding; parity check codes; real-time systems; visual communication; wireless channels; JPEG2000 standard; error correcting code; error-resilience mode; image reconstruction; iterative decoding scheme; joint source-channel decoding; low-density parity-check code; partial codeword bit; real-time wireless image transmission system; source decoder feedback; Acceleration; Design methodology; Error correction codes; Feedback; Image communication; Iterative decoding; PSNR; Parity check codes; Real time systems; Source coding;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3692-7
Electronic_ISBN :
978-1-4244-3693-4
DOI :
10.1109/WICOM.2009.5302028
