Noise reduction method and system for audio recording by single-channel voice equipment
A voice device and single-channel technology, applied in the field of noise reduction, can solve the problems of not considering the phase information and affecting the effect of noise reduction, so as to improve the effect of noise reduction and reduce the effect of error
Active Publication Date: 2021-05-28
AISPEECH CO LTD
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] In order to at least solve the problem that the exponential integral function needed to calculate the gain factor in single-channel noise reduction in the prior art is approximated by a hypergeometric function, there is a certain deviation between the two, and the phase information is not considered in the process of speech signal processing. noise effect problem
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0026] like figure 1 Shown is a flow chart of a noise reduction method for recording audio with a single-channel voice device provided by an embodiment of the present invention, including the following steps:
[0027] S11: Divide the noisy audio into multiple audio frames in the order of time stamps, perform frame shift on the multiple audio fram...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
An embodiment of the present invention provides a noise reduction method for audio recording by a single-channel voice device. The method includes: dividing the noisy audio into multiple audio frames according to the order of time stamps, performing frame shift on the multiple audio frames according to a preset overlap rate, determining the sampling point of each audio frame after frame shifting; obtaining each audio frame The estimated noise amplitude spectrum of the sampling point determines the error interval and reference interval of the hypergeometric function of each audio frame; the error interval is divided into multiple error sub-intervals to obtain the noise reduction amplitude spectrum of each audio frame; based on the sampling points of each audio frame Determine the phase spectrum of each audio frame; determine the time-domain digital signal of each audio frame through the noise reduction amplitude spectrum and phase spectrum, and convert the time-domain digital signals of adjacent audio frames into noise reduction frequency. An embodiment of the present invention also provides a noise reduction system for audio recording by a single-channel audio device. In the embodiment of the present invention, the error interval is segmented, which reduces the error in the noise reduction process and improves the noise reduction effect.
Description
technical field [0001] The invention relates to the field of noise reduction, in particular to a noise reduction method and system for audio recording by a single-channel voice device. Background technique [0002] With the popularization of intelligent voice technology, various types of products are gradually equipped with voice interaction functions. In order to realize the interaction of voice functions, it is necessary to equip corresponding products with sound collection modules. For different functions of the product, it needs to be installed according to different acquisition modules, such as: single mic recall, linear 4 mics, circular 6 mics, car dual mics, and furniture double mics. Among them, the single-mic echo cancellation module: supports echo cancellation, and is suitable for story machines, vehicle-mounted solutions, etc. [0003] For such products with only one microphone, a single-channel noise reduction method is usually used for noise reduction, which us...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G10L21/0224
CPCG10L21/0224
Inventor 周晨
Owner AISPEECH CO LTD