Patent ID: 6167550
Filing Date: 2000-12-26
Classification: G11B,H03M

Abstract:
A method of writing data to a data storage medium comprising:receiving an input data stream;detecting one or more bit sequences in said input data stream associated with a small amplitude read response at least in part by determining if the most recent four bits of said input data stream satisfy the relation:d.sub.0 +d.sub.1 =d.sub.2 +d.sub.3wherein d.sub.0 is the most recent bit of said input data stream, d.sub.1 is the second most recent bit of said input data stream, d.sub.2 is the third most recent bit of said input data stream, and d.sub.3 is the fourth most recent bit of said input data stream;inserting one or more bits into said input data stream in response to said detection, whereby said inserted bits extend the length of said input data stream by a variable amount which depends on said input data stream content; and writing said data stream, including said inserted bits, to said data storage medium.