Patent ID: 6545615
Filing Date: 2003-04-08
Classification: G11B,H03M

Abstract:
A device for encoding a stream of databits of a binary source signal into a stream of databits of a binary channel signal, wherein the bitstream of the source signal is divided into n-bit source words, which device comprises converting means adapted to convert a block of p consecutive n-bit source words into a corresponding block of p consecutive m-bit channel words, where p, n, m are integers and m>n&gE;1, the converting means comprising memory means which contain for each n-bit source word a number of m-bit channel words, arranged in coding states, and a corresponding state number, indicating the coding state for a next m-bit channel word, in which the conversion for at least most of the n-bit source words is parity preserving and/or parity inverting, and that after each block of source words q dc-control sourcebits are added, which dc-control sourcebits are converted into r dc-control channelbits, independent of the conversion of a following source word, where q and r are integers.