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Self-adaptive voice activation detection device and method for high-noise environment on airplane

A voice activation and detection device technology, which is applied in the field of noise control and voice signal processing, can solve problems such as false detection, and achieve the effect of improving accuracy and improving accuracy

Active Publication Date: 2020-06-12
AIR FORCE MEDICAL CENT PLA +1
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Problems solved by technology

When used in a high-noise environment, the high noise of the environment will be picked up into the system by the on-site microphone. When the energy value of the noise picked up by the microphone is close to a fixed threshold, frequent false detections will occur in the Voice Activity Detection (VAD)

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  • Self-adaptive voice activation detection device and method for high-noise environment on airplane
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  • Self-adaptive voice activation detection device and method for high-noise environment on airplane

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] Such as figure 1 As shown, the adaptive voice activation detection device in a high-noise environment on an aircraft is composed of a voice signal preprocessing unit, a feature extraction unit, a VAD judgment unit, a VAD level output unit, and a threshold calculation unit.

[0033] Voice input to the voice signal preprocessing unit, the voice signal preprocessing unit realizes the amplification and bandpass filtering of the voice signal; then the processed voice signal is passed to the feature extraction unit and the threshold calculation unit, and the signal feature extraction unit adopts the circuit through the signal Extracting the short-term energy size of the voice signal and the zero-crossing rate of the short-term signal, the threshold calculation unit sets the threshold of voice activation detection by collecting the no...

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Abstract

The invention belongs to the technical field of voice signal processing and noise control, and particularly relates to a self-adaptive voice activation detection device and method for a high-noise environment on an airplane, and the device comprises a voice signal preprocessing unit, a feature extraction unit, a VAD judgment unit, a VAD level output unit, and a threshold calculation unit, and thevoice is input into the voice signal preprocessing unit. According to the method, self-adaptive voice activation detection in a high-noise environment on an airplane is realized by adopting a VAD algorithm and adopting a voice detection method of a zero rate of a short-time signal in combination with the device. According to the invention, the signal feature extraction unit adopts voice feature extraction of a short-time energy detection method to identify the presence or absence of a voice signal, and obtains relatively accurate voice endpoint judgment in combination with voice features of ashort-time zero-crossing detection method, so that the accuracy of judging the presence or absence of the voice signal is improved.

Description

technical field [0001] The invention belongs to the technical field of voice signal processing and noise control, and in particular relates to a device and method for adaptive voice activation detection in a high-noise environment on an aircraft. Background technique [0002] Adaptive Voice Activation Detection (VAD) technology in high-noise environment on the aircraft, the function is to detect whether there is voice during voice communication, and turn on the "speaking function" only when there is voice transmission, which can reduce interference, increase communication capacity, and reduce energy consumption . If the voice activity detection is not handled well, the voice will be intermittent, or the voice output transmission is not turned off when the noise is too loud, or the voice output transmission is turned off when the voice quality is still good. It cannot meet the requirements of communication sensitivity, which greatly affects the normal voice communication nee...

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Application Information

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IPC IPC(8): G10L25/84
CPCG10L25/84
Inventor 李法林安强力房乔楚蒋科钟方虎殷东辰王若永苏芳周晴霖张慕哲李玉亮
Owner AIR FORCE MEDICAL CENT PLA
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