Joint Source Channel Coding Via Statistical Mechanics: Thermal Equilibrium Between the Source and the Channel

IRWIN AND JOAN JACOBS CENTER FOR COMMUNICATION AND INFORMATION TECHNOLOGIES Joint Source-Channel Coding via Statistical Mechanics: Thermal Equilibrium Between the Source and the Channel

We examine the classical joint source–channel coding problem from the viewpoint of statistical physics and demonstrate that in the random coding regime, the posterior probability distribution of the source given the channel output is dominated by source sequences, which exhibit a behavior that is highly parallel to that of thermal equilibrium between two systems of particles that exchange energ...

Joint Source-Channel CELP Coding

The method of speech coding CELP is extensively used in much voice communication-, multimedia-, video conference and other systems. There are a lot of papers related to CELP coding characteristics improvement for a better speech quality after decoding. Most of the papers are dedicated to lower the rate of CELP coded speech transmission. One problem related to low rate CELP speech transmission w...

Joint Source Channel Coding for Fading Channel: The Broadcast Approach-Expected Distortion, Gaussian Source and Channel

We consider the problem of transmitting a Gaussian source on a slowly fading Gaussian channel, subject to the mean squared error distortion measure. The channel state information is known only at the receiver but not the transmitter. The source is assumed to be encoded in a successive refinement manner, and then transmitted over the channel using the broadcast strategy. In order to minimize the...

Statistical mechanical aspects of joint source-channel coding

– An MN-Gallager Code over Galois fields, q, based on the Dynamical Block Posterior probabilities (DBP) for messages with a given set of autocorrelations is presented with the following main results: a) for a binary symmetric channel the threshold, fc, is extrapolated for infinite messages using the scaling relation for the median convergence time, tmed ∝ 1/(fc− f); b) a degradation in the thre...

On joint source-channel coding for the Wyner-Ziv source and the Gel'fand-Pinsker channel