A wavelet domain diversity method for transmission of images over wirelesschannels

We propose a wavelet domain diversity combining method to combat errors dur ing image transmission on wireless channels, For images represented in the wavelet domain, diversity is used to obtain multiple data streams correspon ding to the transmitted image at the receiver, These individual image data streams are combined to form a composite image with higher perceptual quali ty, Both uncompressed and compressed images are considered. The SPIHT algor ithm is used for image compression, Diversity combining methods for both un compressed and compressed images exploit the characteristics of the wavelet transform. For compressed images, unequal error protection is employed in conjunction with diversity combining. Simulation results demonstrate that t he quality of the received image can be significantly improved.