Method for detecting audio exceptional event based on environmental model

A technology for abnormal events and environmental models, applied in speech analysis, speech recognition, instruments, etc., to solve problems such as the impact of video surveillance systems, the occlusion of video surveillance systems, and the impact of surveillance effects.

Inactive Publication Date: 2011-08-24
BEIJING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

[0003] With the popularization of surveillance systems, more and more deficiencies have been exposed in surveillance systems that rely solely on video
[0004] First, video surveillance systems are easily affected by light
In outdoor monitoring, the detection effect of the camera will be greatly reduced when it is cloudy; in indoor monitoring, the camera cannot work norm

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  • Method for detecting audio exceptional event based on environmental model
  • Method for detecting audio exceptional event based on environmental model
  • Method for detecting audio exceptional event based on environmental model

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Embodiment Construction

[0052] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and the experimental conditions of the examples.

[0053] The present invention is an audio abnormal event detection method based on an environmental model. The method is to firstly process the audio data in the original audio file to extract the audio characteristic parameters, and then use these parameters and several basic types of hidden Markov models to perform Compare to obtain the similarity vector. Then, denoise processing is performed on the basis of the similarity vector. Finally, on this basis, the environment model is used to analyze and judge whether there are abnormal audio events. The present invention can overcome the deficiencies of incomplete definition of abnormal events and too large training data set in the prior art when analyzing whether abnor...

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Abstract

The invention relates to a method for detecting an audio exceptional event based on an environmental model, comprising the following operating steps of: (1) analyzing audio data in a monitoring environment by utilizing a hidden Markova model to obtain the level of similarity of the current audio segment corresponding to each audio type, thus a similarity vector is formed; (2) sorting on the basis of the similarity vector to obtain a type detection vector; and (3) firstly building an environmental model when no exceptional event happens by utilizing a neural network-based method and adopting an offline training mode, and then judging whether the current audio is an exceptional event or not in an online testing way according to a trained model.

Description

technical field [0001] The present invention relates to a method for detecting abnormal events based on audio information, to be precise, relates to a method for detecting abnormal audio events based on an environment model, which belongs to the information security technology of audio signal analysis and its application in the audio monitoring system of multimedia information field. Background technique [0002] With the continuous development of multimedia technology and the improvement of people's safety awareness, the monitoring system based on audio and video plays an increasingly important role in people's work and life. For example, in a smart home, people will deploy cameras to monitor for illegal entry; in a smart office, people will deploy cameras and audio sensors to detect the occurrence of abnormal events; in a smart child monitoring system, people will deploy audio sensor nodes , See if the baby in the ward is crying, etc. [0003] With the popularity of surv...

Claims

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Application Information

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IPC IPC(8): G10L15/06G10L15/14
Inventor 李祺朱洪亮辛阳邹俊伟黎羴刘杰
Owner BEIJING UNIV OF POSTS & TELECOMM
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