HP Labs Technical Reports

Performance of Predictive Coders Over Noisy Channels with Feedback

Khansari, Masoud

HPL-97-170

Keyword(s): predictive coders; noisy channel; DPCM

Abstract: Predictive coding methods such as DPCM or motion compensated hybrid video coders MPEG family are shown to adequately 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. In this report, we consider two such feedback-based methods and provide the analysis and investigate different trade-offs.

12 Pages

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