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
CN102509546BActive Publication Date: 2013-07-10BEIJING TELESOUND ELECTRONICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING TELESOUND ELECTRONICS
Publication Date
2013-07-10

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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.
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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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