公开(公告)号：US4897652A

公开(公告)日：1990-01-30

申请号：US174470

申请日：1988-03-28

申请人： Remi Leon

发明人： Remi Leon

IPC分类号： G06F7/57 ,  H03M7/50

CPC分类号： H03M7/50 ,  G06F7/483

摘要： A coding method uses a pseudo-logarithmic compression law approximated by a straight line segment curve. Its code word on n+1 binary digits, where n is a positive invariant integer, has a lefthand part made up of a variable number p of binary digits having the same value (1) corresponding to the rank number of the segment concerned in the compression law and a righthand part, which may be absent, determining the interval within the segment concerned. It may be implemented on the basis of a series of counting pulses defining the number to be coded by means of a circuit which comprises a divider circuit having a plurality of division ratios operating on the series of counting pulses, a synchronization circuit which also selects the division ratio of the divider circuit corresponding to the increment between intervals in the segment concerned of the compression law, and a counting circuit operating on the series of pulses delivered by the divider circuit and supplying on parallel outputs the value of the code word corresponding to the number of counting pulses applied to the input of the divider circuit.

摘要翻译： 编码方法使用由直线段曲线近似的伪对数压缩定律。 其n + 1个二进制数字上的代码字，其中n是正不变整数，具有一个左边部分，该部分由具有相同值（1）的二进制数字的可变数p构成，该值对应于 压缩法和右手部分，可能不存在，确定相关段内的间隔。 它可以基于一系列计数脉冲来实现，这些计数脉冲通过包括在一系列计数脉冲上具有多个分频比的分频电路的电路来定义要被编码的数字，同步电路还选择 对应于与压缩规律有关的段中的间隔之间的增量的分频器电路的分频比，以及对由分频器电路传送的一系列脉冲进行操作并对并行输出提供的代码字的值的计数电路， 施加到除法器电路的输入的计数脉冲数。