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DISTINGUISHING RECEIVED A-LAW AND $g(m)-LAW SIGNALS IN A PCM MODEM

机译：在PCM调制解调器中区分收到的A-LAW和$ g（m）-LAW信号

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摘要

A method in a modem having a frame having a plurality of slots, for determining whether incoming DIL sequence information contains A-law or mu-law is provided. From the DIL sequence information, an ordered table of levels for each slot is generated. The levels of all non-robbed-bit slots are averaged, and average levels are subjected to an A-law/mu-law separation function. The separation function F1(n1,n2)=sum from i=n1 to i=n2 {L(i) - 2* [L(i-16]} effectively compares values of a first plurality of levels L(i) to twice the values of a second plurality of levels sixteen levels removed from the first plurality of levels (420). The sum is compared to a threshold (430), as the sum will be small for A-law values and large for mu-law values.

机译：提供了一种在具有具有多个时隙的帧的调制解调器中的方法，该方法用于确定输入的DIL序列信息是包含A律还是μ律。根据DIL序列信息，生成每个时隙的等级的有序表。对所有非抢劫位时隙的电平求平均，并对平均电平进行A律/μ律分离功能。分离函数F1（n1，n2）=从i = n1到i = n2的和{L（i）-2 * [L（i-16]}有效地将多个第一层L（i）的值进行两次比较从第一多个级别中除去的第二多个级别的值十六个级别（420），将该和与阈值（430）进行比较，因为对于A律值，该和将较小，而对于mu律值，该和将较大。。

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公开/公告号EP1157475A4

专利类型
公开/公告日2004-12-15

原文格式PDF
申请/专利权人 SILICON LABORATORIES INC.;
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申请/专利号EP20000903326
发明设计人 GOLDSTEIN YURI;OKUNEV YURI;WANG QIN;DRUCKER VITALY;
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申请日2000-01-18
分类号H04B1/38;H04B14/04;H04J3/12;H04L23/00;H04L23/02;H04L27/04;H04L27/10;H04L27/20;H04L27/36;
国家 EP
入库时间 2022-08-21 22:11:57

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