Patent ID: 6347390
Filing Date: 2002-02-12
Classification: G11B,H03M

Abstract:
An encoding method for encoding m-bit data to an n-bit code, characterized in that: the n-bit code is generated according to a finite state transition diagram representing the restriction of ADS and RDS received by a code sequence; two states contained in a state assembly set as start points of the n-bit code in the finite state transition diagram exist at symmetrical positions with respect to the center point of the finite state transition diagram, at symmetrical positions with respect to the ADS axis passing through the center point of the finite state transition diagram or at the symmetrical positions with respect to the RDS axis passing the center point of the finite state transition diagram; the m-bit data are encoded to an n-bit code word having as a start point a predetermined state contained in a state assembly set as start points of the code; and an n-bit code word having as a start point another state contained in a state assembly set as start points by the code is obtained by further converting the encoded code word.