Method for suppressing howling, device terminal and non-transitory computer-readable storage medium

Abstract

The invention relates to the technical field of speech signal processing, and provides a method for suppressing howling, a device terminal and a non-transitory computer-readable storage medium, and realizes the technical effect of accurately detecting and suppressing howling in an automatic manner. The method includes: judging whether it is necessary to suppress the howling of the input audio signal; if it is necessary to suppress the howling of the input audio signal, determining the frequency point of howling to be determined by extracting characteristic information of howling; Howling frequency points are used to calculate the proportion of howling frames and learn howling frequency points, and determine the definite howling frequency points in the pending howling frequency points according to the processing results; calculate the power logarithm value of the definite howling frequency points; The power logarithm value of the called frequency point and the frequency band in which it is located, and a corresponding number of notch filters are allocated to the determined howling frequency points in different frequency bands to suppress the howling. The technical solution provided by the invention makes the restrictive conditions more comprehensive when judging howling frequency points, reduces the occurrence of misjudgments, and improves the accuracy.

Description

technical field [0001] The present invention relates to the technical field of voice signal processing, in particular to a method for suppressing howling, a device terminal and a non-transitory computer-readable storage medium. Background technique [0002] Howling is essentially a kind of feedback sound, which is mainly caused by self-excitation of energy due to problems such as too close a distance between the sound source and the loudspeaker equipment, for example, the simultaneous use of microphones and speakers, and the playback of audio devices The sound can be transmitted to the microphone through the space and the sound energy from the speaker is large enough, the pickup sensitivity of the microphone is high enough, and so on. Today, as products such as microphone speakers, Bluetooth karaoke treasures and TV karaoke are becoming more and more popular, howling is also becoming more and more common. Howling is very harmful, which not only makes the experience of singe...

AI Technical Summary

Problems solved by technology

However, due to factors such as the movement of people, the shape of the room, and the movement of the microphone, the previously adjusted curve is invalid, and the manual adjustment is inefficient, and the user cannot complete it alone. It is called, and its obvious defect is that the power is lower than the accuracy of the algorithm

[0004] In summary, the existing howling suppression methods mainly have low degree of automation, low efficiency, or have the ability to automatically suppress howling, but the accuracy rate is relatively low

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