Title :
Improved sub-block encoder of irregular LDPC code for image transmission
Author :
Payommai, Tanaporn ; Chiracharit, Werapon ; Chamnongthai, Kosin
Author_Institution :
Dept. of Electron. & Telecommun. Eng., King Mongkut´´s Univ. of Technol. Thonburi, Bangkok, Thailand
Abstract :
This paper presents irregular low-density parity-check (LDPC) code for image transmission system with any desired code lengths. Parity position of sub-block encoder is easily constructed over additive white Gaussian noise (AWGN) channel. The code is used as forward error correction (FEC) technique to protect transmitted source data over the channel. The sub-block encoder is designed with various AWGNs at three code lengths of 522, 2,021 and 4,183. The proposed irregular LDPC code reduces bit error when the code length increases. The performance is evaluated by bit error rate (BER) improvement 33.33% and peak signal-to-noise ratio (PSNR) more than 30 at SNR equals 7 dB.
Keywords :
AWGN channels; block codes; channel coding; error correction codes; error statistics; forward error correction; image coding; parity check codes; visual communication; additive white Gaussian noise channel; bit error rate; code length; forward error correction technique; image transmission system; irregular LDPC code; irregular low-density parity-check code; parity position; peak signal-to-noise ratio; source data; subblock encoder; Bit error rate; Channel coding; Equations; Image communication; PSNR; Parity check codes;
Conference_Titel :
System Integration (SII), 2011 IEEE/SICE International Symposium on
Conference_Location :
Kyoto
Print_ISBN :
978-1-4577-1523-5
DOI :
10.1109/SII.2011.6147416
