Speech decoding apparatus and method of decoding.,申请号EP19930306408-传众专利搜索

Speech decoding apparatus and method of decoding.

申请公布号：EP0583172(A1)

申请号：EP19930306408

申请日期：1993.08.13

申请公布日期：1994.02.16

申请人：

NEC CORPORATION

发明人：FUJIWARA, RYUHEI

分类号：H04B14/04;H04L1/00;(IPC1-7):G10L5/00;G10L9/18;G10L5/02

主分类号：H04B14/04

摘要：<p>In a speech decoding apparatus (100) supplied with an input speech signal (101) comprising successive blocks, each comprising a digital speech signal and an error detecting code signal, an error detector (8) detects an error in the digital speech signal by the error detecting code signal for each block to produce error detection pulses whenever the error detector detects the error, The error detector also produces the digital speech signals of the blocks. A speech decoder (9) decodes the digital speech signals of the blocks into an analog speech signal. A measuring circuit (102) measures, as a measured value, the number of the error detection pulses during a predetermined time interval. A comparator (15) compares the measured value with a reference value to produce a command signal when the measured value is greater than the reference value. A generator (12) generates an alarm signal in response to the command signal. <IMAGE></p>