On source/channel codes of finite block length

For certain fortunate choices of source/channel pairs, all sophisticated coding is in vain: for them, a code of block length one is sufficient to achieve optimal performance \cite{mgbrmvtrans}. Is the set of fortunate choices'' larger if we allow for codes of block length $M$? For a certain class of discrete memoryless source/channel pairs, we can prove that the answer is negative as long as $M$ is finite.

Published in:
IEEE International Symposium on Information Theory, 261
Presented at:
ISIT 2001, Washington DC, US, 24-29 June 2001
Year:
2001
Keywords:
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