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Error Resilient Image Transmission over Wireless Fading Channels

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Author(s): M Padmaja, | M Kondaiah, | K Sri Rama Krishna

Journal: International Journal of Engineering Science and Technology
ISSN 0975-5462

Volume: 2;
Issue: 5;
Start page: 1242;
Date: 2010;
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Keywords: JPEG | Source coding | Channel Coding | Additive White Gaussian Noise (AWGN).

ABSTRACT
Nowadays transferring images and video over wireless channels is becoming more use of the medium. However, a wireless medium is not very reliable in the way that it adds unwanted components and noise to the wireless transmission. So there may be a loss of data. Due to this possible loss of data without the capability of resending a correct version we need a system to protect and correct such losses. The transmission of images over wireless channels is examined using reorganization of the compressed images into error-resilient, product-coded streams. The product-code consists of Turbo-codes or Reed–Solomon codes which are optimized using an iterative process. The wireless channel used for the testing phase is a Rayleigh Fading channel with Additive White Gaussian Noise (AWGN) added as a noisecomponent. In this paper we propose protection techniques for image transmission and compare the performance of various protection methods for all JPEG standards. The proposed image standard model was found to perform very well in protecting the images against quality degradation during transmission over wireless channels. The strength of the protection plays a large part in the protection of the image and should be chosen to suit the particular channel in use. Thedefault protection also provides very strong protection for the user who does not wish to choose their own setting.
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