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Typical abnormal sound detection method and device

An abnormal sound and typical technology, applied in speech analysis, instruments, etc., can solve the problems that are not easy to apply in the field of video and audio monitoring, and the implementation process is complicated, so as to achieve the effect of expanding the scope of use and low computational complexity

Inactive Publication Date: 2016-07-27
ZHEJIANG DAHUA TECH
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Problems solved by technology

Although this method can consider the influence of background noise, the implementation process is very complicated, and it is not easy to apply to the actual video and audio monitoring field

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  • Typical abnormal sound detection method and device
  • Typical abnormal sound detection method and device
  • Typical abnormal sound detection method and device

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Embodiment Construction

[0022] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] An embodiment of the present invention proposes a method for detecting abnormal sounds based on features of a spectrogram. For sound information, people rely on the three features of timbre, pitch, and volume to distinguish, and these features can be characterized by parameters in the time-frequency structure of the spectrogram. The spectrogram is a three-dimensional perceptual map describing the sound signal, which is composed o...

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Abstract

The invention discloses a typical abnormal sound detection method and a device, relates to the voice signal processing field and particularly provides an abnormal sound detection method based on spectrograms. According to the method, a sound signal is acquired, the sound signal is pre-processed, and effective signal segments of the sound signal are determined; the spectrograms of the effective signal segments are acquired, a to-be-tested identification characteristic matrix is determined, and the to-be-tested identification characteristic matrix is used for representing sound intensity distribution of the sound signal on the time-frequency domain; similarities between the to-be-tested identification characteristic matrix and each standard identification characteristic matrix in an abnormal sound model database are calculated, and abnormal sound types of the effective signal segments are determined according to calculation results; computational complexity in an abnormal sound identification process is simplified, and detection accuracy is improved.

Description

technical field [0001] The invention relates to the field of voice signal processing, in particular to a typical abnormal sound detection method and device. Background technique [0002] Abnormal sound refers to the sound that should not occur in normal environment, and usually refers to the sound related to the safety of people's life and property that occurs suddenly in the normal production and life of human beings. Abnormal sound detection refers to finding out the endpoints (starting point and end point) of abnormal sound from a continuous sound signal, and extracting effective abnormal sound signals from it. The characteristics of glass breaking sound are relatively obvious, and it is more convenient to detect in practical applications, and in some occasions such as shopping malls, buses, streets, etc., explosions are generally accompanied by glass breaking sound, so glass breaking sound is used as a The detection of typical abnormal sounds has certain practical value...

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Application Information

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IPC IPC(8): G10L25/78
Inventor 高娅乔刚张兴明
Owner ZHEJIANG DAHUA TECH
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