Patent ID: 6175318
Filing Date: 2001-01-16
Classification: G11B,H03M

Abstract:
An encoder for encoding a stream of n-bit source words of a binary source signal into a stream m-bit channel words of a binary channel signal, said encoder comprising:converting means for converting each successive block of p consecutive n-bit source words into a corresponding block of p consecutive m-bit channel words, the conversion of each block being substantially parity preserving, where n, m and p are integers, m>n.gtoreq.1, and p>1 and is variable; anddetecting means coupled to said converting means for detecting the presence in the bitstream of the binary source signal of the 8-bit sequence ""00010001"", and in that event controlling said converting means to convert said 8-bit sequence into the 12-bit sequence ""100010010010"" in the binary channel signal.