Voice triggering method and circuit
A voice control and audio amplifier circuit technology, applied in speech analysis, speech recognition, instruments, etc., can solve problems such as difficulty in guaranteeing and distinguishing human voice and non-human voice signals, achieving low power consumption, shielding environmental noise, preventing The effect of speech bursts
Active Publication Date: 2014-12-17
PANDA ELECTRONICS GROUP +3
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Problems solved by technology
[0003] The existing voice automatic control function, namely VOX function, is difficult to distinguish between human voice and non-human voice signal, and non-human voice signal cannot trigger the transmission of the walkie-talkie. It is necessary to avoid false triggering caused by environmental noise, even if the voice signal model of human speech is used , to analyze and recognize the voice signal from the sound signal input by the microphone, and it is difficult to ensure that only when the human voice signal is detected, the intercom is triggered to transmit through the PTT
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[0022] The present invention is based on technologies such as a logarithmic wave detection circuit, a communication holding circuit, a comparison and judgment circuit, etc., to complete the automatic control and sending of human voice and the holding of the communication circuit of half-duplex communication equipment. The logarithmic detection circuit performs signal recognition and detection on human voice, so as to realize the automatic control of human voice. In the communication holding circuit, the communication activation and opening time is about 50mS, and the communication holding circuit is about 3 seconds, which can effectively avoid the interruption of communication and the loss of words caused by speech pauses. In the comparison and judgment circuit, the detected signal level value is compared with the reference level, and the PTT is controlled after the judgment is made on the human voice signal reaching the reference level value. The specific circuit is as follow...
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The invention relates to a voice automatic triggering method. In the voice automatic triggering method, a voice detection circuit and a first comparison and judgment circuit are adopted; the voice detection circuit comprises an audio amplification circuit and a voice detector circuit; the current input of a microphone passes through the audio amplification circuit; the output of the voice detection circuit is connected with the first comparison and judgment circuit formed by a comparator circuit; the first comparison and judgment circuit is connected with a communication keeping circuit; the communication keeping circuit consists of a switch control circuit, a quick charging circuit and a remote control (RC) slow discharging circuit and is used for realizing quick triggering and transient keeping of communication; a second comparison and judgment circuit realizes voice automatic triggering of voice control PTT enabling; and the voice detector circuit is a logarithmic detector circuit and is used for identifying and detecting signals according to people's voice.
Description
1. Technical field [0001] This invention belongs to radio communication. 2. Background technology [0002] Automatic voice control technology is a technology that automatically triggers wireless intercom and radio PTT control transmission through human voice, which eliminates the cumbersome operation of ordinary intercoms that need to press the PTT button by hand, and truly frees hands. At the same time, it realizes real human voice control and effectively avoids false triggering caused by environmental noise. It is very effective for the communication between half-duplex equipment and full-duplex equipment in a dedicated environment, and the use of walkie-talkies in a tense environment. and practical. [0003] The existing voice automatic control function, namely VOX function, is difficult to distinguish between human voice and non-human voice signal, and non-human voice signal cannot trigger the transmission of the walkie-talkie. It is necessary to avoid false triggering ...
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IPC IPC(8): G10L15/26G10L15/20G10L15/28
Inventor 庄东曙付涛黄锦香
Owner PANDA ELECTRONICS GROUP