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An enumerative coding technique for DC-free runlength-limited sequences

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2 Author(s)
Braun, V. ; Alcatel Corp. Res. Center, Stuttgart, Germany ; Schouhamer Immink, Kees A.

We present an enumerative technique for encoding and decoding DC-free runlength-limited sequences. This technique enables the encoding and decoding of sequences approaching the maxentropic performance bounds very closely in terms of the code rate and low-frequency suppression capability. Use of finite-precision floating-point notation to express the weight coefficients results in channel encoders and decoders of moderate complexity. For channel constraints of practical interest, the hardware required for implementing such a quasi-maxentropic coding scheme consists mainly of a ROM of at most 5 kB

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Communications, IEEE Transactions on  (Volume:48 ,  Issue: 12 )