Combined source/channel (de-)coding: can a priori information be used twice?

In the digital transmission of speech, audio, images and video signals residual redundancy is often left after source coding due to the complexity and delay constraints. This redundancy remains both inside one block or frame but also in a time correlation of subsequent frames. Both kinds of redundan...

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Bibliographic Details
Main Authors: Hindelang, T., Fingscheidt, T., Seshadri, N., Cox, R.V.
Format: Conference Proceeding
Language:English
Subjects:
AWGN channels
Bit error rate
Convolutional codes
Interleaved codes
Iterative decoding
Iterative methods
Speech
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Summary:In the digital transmission of speech, audio, images and video signals residual redundancy is often left after source coding due to the complexity and delay constraints. This redundancy remains both inside one block or frame but also in a time correlation of subsequent frames. Both kinds of redundancy are used in an iterative process of source and channel decoding to improve the quality of the transmitted parameters. For better understanding, Gaussian distributed and time correlated parameters are used.
DOI:10.1109/ISIT.2000.866564