Performance of predictive coders over noisy channels with feedback

Predictive coding methods such as DPCM used for lossless coding of images or motion compensated hybrid video coders of the MPEG family are shown to compress the input signal well with a reasonable complexity. The performance of these coders, however, degrades considerably when the transmission channel is not error-free. This is due to the error propagation at the decoder where a single error can have catastrophic consequences. A low-rate feedback channel is shown to improve the overall performance. We consider two such methods, provide an analysis of these methods and investigate their different trade-offs