Title :
Turbo-codes used for compressed image transmission over frequency selective fading channel
Author :
Fei, Xiaogan ; Ko, Tszmei
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., Hong Kong
Abstract :
The turbo-code is a newly developed channel coding technique with amazing error correcting capability. Turbo-codes are applied to JPEG compressed images in a wireless environment. The wireless channel is modeled as a frequency selective fading channel with a two-ray profile. Different combinations of source and channel code rates are simulated for image transmission. In addition, unequal error protection for the header syntax of JPEG compressed images is considered. It is found that turbo-codes combined with unequal error protection give excellent performance for compressed image transmission, even at a high delay spread. The optimum joint source/channel coding schemes are given at different delay spreads. The image qualities are compared both subjectively and objectively
Keywords :
channel coding; code standards; convolutional codes; delays; diversity reception; error correction codes; fading; image coding; land mobile radio; source coding; telecommunication standards; visual communication; JPEG compressed images; channel code rate; compressed image transmission; convolutional codes; error correcting code; frequency selective fading channel; header syntax; high delay spread; image compression standard; image quality; joint source/channel coding; mobile radio; performance; source code rate; turbo-codes; two-ray profile; unequal error protection; wireless channel; wireless environment; Channel coding; Delay; Error correction; Error correction codes; Fading; Frequency; Image coding; Image communication; Transform coding; Turbo codes;
Conference_Titel :
Global Telecommunications Conference, 1997. GLOBECOM '97., IEEE
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-4198-8
DOI :
10.1109/GLOCOM.1997.638406
