Patent ID: 7038599
Filing Date: 2006-05-02
Classification: G11B,H03M

Abstract:
1. A method for generating a channel code with DC control, said method comprising the steps of: converting a stream of P n-bit input words into a stream of P m-bit code words; and converting the stream of P m-bit code words into an output stream of P m-bit output words using a NRZI converter, characterized in that the method further comprises the steps of: determining a running digital sum of the output stream of output words; and in response to the running digital sum, replacing a sequence of Q m-bit code words, by a replacement sequence of Q m-bit replacement code words, the replacement sequence being equally long and having a different parity than the sequence of code words being replaced, and said replacement sequence never occurring in a stream of m-bit code words when converting any stream of n-bit input words into m-bit code words, and in that the replacement sequence is chosen from the following table: