公开(公告)号：US3742146A

公开(公告)日：1973-06-26

申请号：US3742146D

申请日：1970-10-20

Applicant: NAT RES DEV

Inventor： NEWMAN E ,  PAY B ,  MANNING D

IPC: G10L19/02 ,  G10L25/00 ,  G10L1/04

CPC classification number: G10L25/00 ,  G10L19/02

Abstract: The recognition of signals having specific periods is described particularly in relation to recognising vowels. Characteristic frequencies in vowels are recognised by circuits which delay the input signals for an interval related to a frequency to be recognised, correlate the delayed signals with undelayed input signals and integrate the resultant over a short period comparable with the duration of the vowel sound. The magnitude and sign of the integrated signal indicates whether the required signal is present. In order to deal with speech an incoming signal is first passed to a special form of AGC circuit and then divided into low and high frequency components. The presence of characteristic frequencies in these components is determined by the technique described above, and logic circuits indicate what combinations of frequencies and thus what vowels are present.

Abstract translation: 关于具有特定周期的信号的识别特别涉及识别元音。 元音中的特征频率由延迟输入信号与待识别频率相关的间隔的电路识别，将延迟的信号与未延迟的输入信号相关，并将结果与​​元音的持续时间相比较。 积分信号的幅度和符号表示是否存在所需的信号。 为了处理语音，输入信号首先传递到AGC电路的特殊形式，然后分为低频和高频分量。 这些分量中的特征频率的存在由上述技术确定，并且逻辑电路指示频率的组合以及因此存在什么元音。