Patent ID: 6097321
Filing Date: 2000-08-01
Classification: G11B

Abstract:
A method of encoding user data, comprising the steps of:providing a base code having transition-allowed bit slots and transition-disallowed bit slots, each of the transition-allowed bit slots being a bit slot in which a bit representing a third consecutive transition of a logic signal can occur, each of the transition-disallowed bit slots being a bit slot in which a bit representing a third consecutive transition of a logic signal cannot occur, each transition being a change in logic level of the logic signal, and said base code having no two transition-allowed bit slots adjacent to each other; andchanging at least one of said transition-disallowed bit slots to a transition-allowed bit slot such that at least two transition-allowed bit slots are adjacent to each other and at least one transition-disallowed bit slot remains in a changed code.