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Noise reduction and abnormal sound detection method applied to rail transit

A technology for abnormal sound and rail transit, applied in speech analysis, speech recognition, instruments, etc., can solve the problems that audio monitoring is difficult to achieve auditory effects, and achieve the effect of improving audio monitoring effect, suppressing noise components, and improving response speed

Active Publication Date: 2013-07-10
BEIJING TELESOUND ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the influence of environmental noise, audio monitoring is often difficult to achieve a good hearing effect. In order to achieve "clear hearing", it is urgent to design an effective noise reduction and abnormal sound detection method

Method used

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  • Noise reduction and abnormal sound detection method applied to rail transit
  • Noise reduction and abnormal sound detection method applied to rail transit

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Embodiment Construction

[0027] A noise reduction and abnormal sound detection method applied to rail transit proposed by the present invention will be described in detail below with reference to the drawings and embodiments.

[0028] Such as figure 1 , 2 Shown is the method flowchart of the embodiment of the present invention, and the method includes the following steps:

[0029] S0, generate a certain number of sound signal sample libraries within the scope of the rail transit monitoring area, then extract the eigenvalues ​​of each sound signal in the sample library, form a eigenvector according to the eigenvalues ​​of each sound signal, and then process the formed eigenvectors Perform clustering operations to generate sample library feature models. The clustering operation specifically includes: modeling using a Gaussian Mixture Model (GMM), or modeling using other models, such as a Hidden Markov Model (HMM);

[0030] S1, collecting sound signals within the scope of the rail traffic monitoring a...

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Abstract

The invention relates to the technical field of voice recognition, and discloses a noise reduction and abnormal sound detection method applied to rail transit. The method comprises the following steps: S1, acquiring sound signals in a rail transit monitoring range; S2, converting the sound signals to digital signals from analog signals; S3, extracting the characteristic values of the digital signals, and judging whether the sound signal is abnormal or not according to the characteristic values; and S4, constructing a filter for performing noise reduction process for the sound signals outputted by the step 2, and outputting the processed sound signals. According to the invention, the voice recognition technical design is utilized, the noise component of the sound signals in the rail transit monitoring range can be effectively restrained, and meanwhile, the abnormal sound of the rail transit monitoring range can be detected conveniently.

Description

technical field [0001] The invention relates to the technical field of speech recognition, in particular to a noise reduction and abnormal sound detection method applied to rail transit. Background technique [0002] With the rapid development of rail transit, rail transit has become an important means of transportation for urban residents' daily travel. There are many passengers and passengers on rail transit, which has become a major problem in the safe operation of rail transit. The video monitoring system introduced later provided the operation department with more comprehensive on-site monitoring information to a certain extent. Through this information, the operation department can understand the safety situation in the rail station in real time. Since these monitoring systems do not have audio monitoring functions, video monitoring alone is powerless for some special events, such as sudden onlookers, explosions, shouts, and calls for help. [0003] Speech recognition...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L15/02G10L15/14G10L21/0208G10L21/02
Inventor 谭政
Owner BEIJING TELESOUND ELECTRONICS
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