公开(公告)号：WO1996003742A1

公开(公告)日：1996-02-08

申请号：PCT/US1995009207

申请日：1995-07-21

Applicant: GPTECH, INC.

Inventor： GPTECH, INC. ,  GARZA, Ricardo, R.

IPC: G11B05/02

CPC classification number: G11B20/10 ,  G11B5/09

Abstract: A storage system for storing information on a magnetic media is embodied within a conversion device. The system is operable to store data within a bit cell by receiving data from a controller board (14), which data is generated by a CPU (52). This data is converted from an ordinary MFM format received on a bus (32) and then converted to a Super High Density (SHD) data format. In the SHD format, a counter is provided for counting down from an initial starting time corresponding to a reference pulse (102) to an end count value corresponding to the value of a data word. The time between the reference pulse and the end of count value constitutes the length of time from the beginning of the bit cell to the position in the bit cell at which a data pulse is recorded. During a decode operation, i.e. a Read operation, it is only necessary to determine the position of the data pulse within the bit cell with a counter that counts from the predetermined reference pulse to the position of the detected data pulse. This corresponds to a data value. Therefore, a multiple bit data word can be encoded within a given bit cell.

Abstract translation: 用于存储关于磁性介质的信息的存储系统被实现在转换装置内。 该系统可操作以通过从控制器板（14）接收数据来存储位单元内的数据，该数据由CPU（52）产生。 该数据从在总线（32）上接收的普通MFM格式转换，然后转换为超高密度（SHD）数据格式。 在SHD格式中，提供了一个计数器，用于从对应于参考脉冲（102）的初始开始时间向下计数到对应于数据字值的结束计数值。 参考脉冲和计数值结束之间的时间构成从位单元的开始到记录数据脉冲的位单元中的位置的时间长度。 在解码操作（即读操作）期间，只需要用从预定参考脉冲计数到检测数据脉冲的位置的计数器确定位单元内的数据脉冲的位置。 这对应于数据值。 因此，可以在给定位单元内编码多位数据字。