Progressive Image Transmission over Memoryless Feedback Channels Using Joint Source-Channel Coding Strategy

In this paper, we consider the problem of joint source-channel coding for image progressive transmitted over channels with feedback. Feedback routes are provided in many existing standard wireless channels, making rate allocation with feedback a problem of considerable practical importance. We address the question of rate allocation between the source and channel codes in the forward channel, in the presence of feedback information and under a distortion cost function. We show that the presence of feedback shifts the optimal rate allocation point, resulting higher rates for error-correcting codes and smaller overall distortion. Simulations on memoryless channels show that the presence of feedback allows up to about 1.5 dB improvement in PSNR compared to the similarly optimized feedforward scheme.