Voice activity detection method and apparatus thereof

Abstract

The invention provides a voice activity detection method and an apparatus thereof. The method comprises the following steps of calculating an auditory characteristic of a sound signal, wherein the auditory characteristic includes a first dimension parameter related to a priori signal to noise ratio, a second dimension parameter related to a posterior signal-to-noise ratio and a third dimension parameter related to the time domain signal; comparing the first dimension parameter, the second dimension parameter and the third dimension parameter with corresponding auditory thresholds respectively so as to acquire a detection result. In the invention, the priori signal to noise ratio and the posterior signal-to-noise ratio are used to combine the time domain signal to represent the auditory characteristic, and the extracted auditory characteristic can be used for comparing to the auditory threshold and detecting real-time voice activities. Under a single microphone system, the auditory characteristic under a remote speaking condition can be effectively extracted and voice existence in the sound signal is detected.

Description

technical field [0001] The present invention relates to the field of voice recognition, in particular to a voice activity detection method and device. Background technique [0002] In recent years, with the vigorous development of Internet technology and intelligent hardware, voice intelligent interactive technologies such as voice recognition, voiceprint recognition, and sound source detection have begun to move from laboratories to users. Because speech recognition technology is the core technology of human-computer interaction system based on speech. At present, the recognition rate has reached the usable accuracy rate under limited conditions. The so-called limited adjustment usually means that the distance between the user and the microphone is relatively close, and the noise interference is small. However, the condition that voice commands must be issued at close range limits the convenience of voice interaction. [0003] In the case of long-distance speaking, since...

AI Technical Summary

Problems solved by technology

However, the use of super-directional beamforming technology requires a relatively large number of microphones, and has high requirements for the consistency of the microphones and the accuracy of the geometric positions of the microphones, which increases the difficulty and cost of hardware implementation. Integrated in low-level products, the scope of application is very limited

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