公开(公告)号：US4797931A

公开(公告)日：1989-01-10

申请号：US19421

申请日：1987-02-26

申请人： Yasuo Furukawa ,  Katsuyuki Yamazaki ,  Takemi Hosaka ,  Akira Fukui

发明人： Yasuo Furukawa ,  Katsuyuki Yamazaki ,  Takemi Hosaka ,  Akira Fukui

IPC分类号： H04L27/00 ,  H04M3/22 ,  H04Q1/448 ,  H04Q1/46 ,  H04R29/00

CPC分类号： H04Q1/4485 ,  H04Q1/46

摘要： An audio frequency signal identification apparatus of the present invention has a correlator for obtaining the full band power component and autocorrelation coefficients of a digital audio frequency signal to be identified for each analysis time, a plurality of band pass filters for dividing and filtering the audio frequency signal into a plurality of bands, a plurality of integrators for full wave rectifying and integrating the outputs from the plurality of band pass filters for each analysis time so as to obtain individual power components for the respective bands, a first identification parameter calculator for calculating a maximum power component, a minimum power component, a frequency band yielding the maximum power component, a bandwidth, and a difference between the individual band power components in the respective analysis times, from the individual band power components as the outputs from the plurality of integrators, a second identification parameter calculator for calculating a difference between the autocorrelation coefficients as the output of the correlator and a difference between the autocorrelation coefficients in the respective analysis times, an identification and judgement processor for judging the signal type of the audio frequency signal to be identified in accordance with which of a plurality of predetermined judgement conditions the identification parameters obtained from the first and second identification parameter calculator and the full band power component correspond and if they satisfy a condition of continuity.

摘要翻译： 本发明的音频信号识别装置具有一个相关器，用于获得每个分析时间要识别的数字音频信号的全频带功率分量和自相关系数;多个带通滤波器，用于对音频进行分频和滤波 信号分成多个频带，多个积分器，用于对每个分析时间对来自多个带通滤波器的输出进行全波整流和积分，以获得各个频带的各个功率分量;第一识别参数计算器，用于计算 最大功率分量，最小功率分量，产生最大功率分量的频带，带宽和各个分析时间中的各个频带功率分量之间的差，作为来自多个积分器的输出的各个频带功率分量 ，用于计算的第二识别参数计算器 确定作为相关器的输出的自相关系数与各分析时间中的自相关系数之间的差的识别和判断处理器，用于根据以下的哪一个判断要识别的音频信号的信号类型 多个预定判断条件，从第一和第二识别参数计算器获得的识别参数和全频带功率分量对应，并且如果它们满足连续性条件。