Method and device for reducing false triggering of driver's voice wakeup instruction words

Abstract

The invention discloses a method and device for reducing the false triggering of driver's voice wakeup instruction words, and relates to the field of automobile intelligent technology, and solves a problem that the false triggering method of the voice wakeup instruction words in a conventional voice recognition system cannot simply reduce a false triggering rate while guaranteeing triggering sensitivity. The method of the present invention includes: detecting the voice activity of a received voice signal, filtering out the non-human voice section in the voice signal to obtain a filtered voicesignal; obtaining a first posterior probability of a voice wakeup instruction word included in a text corresponding to the filtered voice signal; calculating the confidence coefficient of the voice wakeup instruction word according to the s voice wakeup instruction word and the second posterior probability of the voice wakeup instruction word; and determining, according to the first posterior probability and the confidence coefficient, whether the voice wakeup instruction word is a driver's voice wakeup instruction word. The method and device are suitable for use in the process of human and device interaction through voice.

Description

technical field [0001] The invention relates to the technical field of automobile intelligence, in particular to a method and a device for reducing false triggering of a driver's voice wake-up instruction word. Background technique [0002] At present, in order to make drivers safer and more convenient when using vehicle-mounted equipment, some vehicle-mounted equipment has added a voice recognition system, so that the driver does not need to manually use voice wake-up instructions to interact with the vehicle-mounted equipment, such as in the navigation equipment through corresponding The search voice wake-up command word is used to search, and the vehicle intelligent control device controls functions such as the air conditioner in the car or the switch of other equipment through the corresponding control voice wake-up command word. [0003] In the process of implementing the present invention, the inventor found that the following problems exist in the prior art. During th...

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Problems solved by technology

[0003] In the process of implementing the present invention, the inventor found that the following problems exist in the prior art. During the actual interaction with the vehicle-mounted equipment through the voice wake-up command words, due to many interference factors in the environment, such as other people talking in the car Sound, non-human voices inside and outside the car, etc. Therefore, in the process of interacting through voice, there must be the problem of false triggering of voice wake-up command words, which will affect the performance of vehicle equipment and bring unnecessary trouble to the driver.

In order to reduce the false triggering of the driver's voice wake-up command word in the process of interacting with the vehicle-mounted device through the voice wake-up command word, two methods are usually used in the prior art: one is by increasing the recognition threshold in the voice recognition system , that is, to improve the accuracy of voice matching, which will reduce the trigger sensitivity of the voice recognition system; the other is to reduce the false trigger rate by introducing more false trigger data training models into the speech recognition system, but more false triggers It is difficult to collect trigger data, and the training modeling process for more false trigger data is more complicated, requiring more manpower and time for data processing, so the cost of this method is relatively high. In addition, in practical applications In this way, the effect of reducing the false trigger rate is not obvious

[0004] In summary, the existing methods for reducing the false triggering of voice wake-up command words in the speech recognition system cannot reduce the false trigger rate more easily on the basis of ensuring the trigger sensitivity

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