公开(公告)号：US4747113A

公开(公告)日：1988-05-24

申请号：US892829

申请日：1986-08-01

申请人： Alain Viallevieille

发明人： Alain Viallevieille

IPC分类号： G11B20/14 ,  H03M5/14 ,  H03M7/14 ,  H03M7/00

CPC分类号： H03M5/145

摘要： A process for the base band modulation of a data signal on a magnetic support is characterized in that: (a) a bit value of 0 is marked if it follows an unmarked bit of value of 0 or a sequence of three consecutive unmarked bits of value 1; (b) a bit value 1 as marked if it follows a bit value 0 or a sequence of three consecutive unmarked bits of value 1, except if these rules (a) and (b) lead to marking the first bit of a sequence formed from three bits of value 1 followed by a bit of value 0. The minimum interfront in the modulated signal is equal to 1.5 T and the maximum interfront is equal to 4 T.

摘要翻译： 用于对磁支持器上的数据信号进行基带调制的过程的特征在于：（a）如果它遵循值为0的未标记位或值为3的连续未标记位的序列，则标记为0的位值 1; （b）除了如果这些规则（a）和（b）导致标记从...的形成的序列的第一位的位数值0或者值为1的三个连续的无标记位的序列之后， 值为1的三位，后跟一个值0.调制信号中的最小相位等于1.5T，最大相位等于4T。

公开(公告)号：US4744086A

公开(公告)日：1988-05-10

申请号：US870703

申请日：1986-06-04

申请人： Alain Komly ,  Michel Maillard ,  Alain Viallevieille ,  Alain Weisser

发明人： Alain Komly ,  Michel Maillard ,  Alain Viallevieille ,  Alain Weisser

IPC分类号： H03M13/00 ,  G11B20/18 ,  H03M13/13 ,  H04L1/00 ,  G06F11/10

CPC分类号： G11B20/1809 ,  H03M13/13

摘要： The invention relates to a process for the transmission in blocks of digital information words with a correction capability. This process consists of transmitting in blocks digital information words, each information word having a length of n.sub.1 bits, in which with each sequence of n.sub.2 -k (n.sub.2 >k) of consecutive information words are associated k redundancy words of n.sub.1 bits each in which, for each order i (1

摘要翻译： 本发明涉及一种具有校正能力的数字信息字块传输的方法。 该过程包括以块传输数字信息字，每个具有n1比特长度的信息字，其中连续信息字的n2-k（n2> k）的每个序列与n个比特的k个冗余字相关联，其中 ，对于每个顺序i（1