Design of reconfigurable random interleavers with MAP decoding for MPEG-4 image transmission system over Rician block-fading channels

Author

Mahapakulchai, Srijidtra ; Phimsen, Nukoon

Author_Institution

Dept. of Electr. Eng., Kasetsart Univ., Bangkok, Thailand

fYear

2010

fDate

19-21 May 2010

Firstpage

978

Lastpage

982

Abstract

The novel design of reconfigurable random interleavers is considered here. Our objective is not only to alleviate the effect of Rician block-fading channels but also to be able to efficiently reduce the complexity of the interleavers. Again, we insert the variable length of MPEG-4 packets into the adjustable interleavers and then pass through the rate 1/2 ring convolutional channel encoder. At the receiver the priori probability of the source image is applied at MAP decoding to enhance the quality of the received image. The simulation results illustrate the improvement in PSNR up to 12 dB.

Keywords

Rician channels; image coding; multimedia communication; MAP decoding; MPEG-4 image transmission system; Rician block-fading channels; image quality; reconfigurable random interleaves; ring convolutional channel encoder; Convolution; Convolutional codes; Demodulation; Frequency; Image communication; MPEG 4 Standard; Maximum likelihood decoding; Quantization; Rician channels; Wavelet coefficients; Block fading; MPEG-4 image; Random interleavers; Rician fading channels; Ring convolutional codes;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Engineering/Electronics Computer Telecommunications and Information Technology (ECTI-CON), 2010 International Conference on

Conference_Location

Chaing Mai

Print_ISBN

978-1-4244-5606-2

Electronic_ISBN

978-1-4244-5607-9

Type

conf

Filename

5491621