Vehicle intelligent voice control system suitable for complex environment and construction method thereof

An intelligent voice and control system technology, applied in voice analysis, voice recognition, instruments, etc., can solve problems such as poor signal separation, achieve the effects of improving voice recognition rate and driving safety, saving costs, and strong compatibility

Pending Publication Date: 2018-12-25
BEIHANG UNIV
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However, this algorithm is only suitable for the ideal situation without noi

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  • Vehicle intelligent voice control system suitable for complex environment and construction method thereof
  • Vehicle intelligent voice control system suitable for complex environment and construction method thereof
  • Vehicle intelligent voice control system suitable for complex environment and construction method thereof

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Embodiment Construction

[0055] See figure 1 — Figure 10 , the present invention proposes a vehicle intelligent voice control system suitable for complex environments, including: an audio input and output unit, a signal preprocessing unit, a signal denoising unit, a signal blind source separation unit, a signal classification unit, a voice keyword recognition unit, Data analysis unit and function execution unit. They are interconnected with each other.

[0056] The audio input and output unit inputs sound stream into the system through an audio input sensor—a binary microphone array, and converts the audio signal into a digital signal through an A / D converter embedded in the microphone.

[0057] The signal preprocessing unit detects whether a voice signal is included in the input audio by a voice activity detection method, and locates the start position and the end position of the voice signal, and then encapsulates the mixed audio signal segment containing the voice into a communication data fram...

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Abstract

The invention relates to a vehicle intelligent voice control system suitable for a complex environment and a construction method thereof. The control system comprises an audio input and output unit, asignal preprocessing unit, a signal denoising unit, a signal blind source separation unit, a signal classification unit, a speech keyword recognition unit, a data analysis unit, and a function execution unit, which are connected to each other. The advantages of the invention are as follows: 1) a wavelet threshold denoising method is used to remove complex noise, an optimal wavelet basis can be adaptively selected, and a threshold can be selected according to changes in noise; 2) an underdetermined blind source separation method is introduced to separate a speech instruction from a mixed audioincluding many interferences, thereby improve the recognition rate of the speech instruction; 3) the system only uses a binary microphone as an audio input end, which saves the cost; and 4) all the interfaces adopt a common interface standard, the compatibility is strong, and the system is easily applied to various vehicle platforms.

Description

technical field [0001] The invention is a vehicle intelligent voice control system suitable for complex environments and its construction method. It adopts voice enhancement technology based on wavelet threshold denoising and blind source separation, combined with automatic voice keyword recognition technology, to realize the control system in complex vehicle environments. Accurate recognition of voice commands, improving vehicle intelligence and driving safety, belongs to the field of digital signal processing. Background technique [0002] Intelligent driving is the behavior of car driving assisted or replaced by artificial intelligence. It can make up for the defects of human drivers and make driving more convenient and safer. With the rapid development of sensor and artificial intelligence technology, intelligent driving has attracted widespread attention in the fields of automobile industry, information technology and Internet, and related technologies and industries ha...

Claims

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Application Information

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IPC IPC(8): G10L15/04G10L15/14G10L15/16G10L15/22G10L15/26G10L21/0208G10L21/0216G10L21/028
CPCG10L15/04G10L15/142G10L15/16G10L15/22G10L15/26G10L21/0208G10L21/0216G10L21/028G10L2021/02166G10L2015/223
Inventor 雷鹏陈美玲王俊关振宇
Owner BEIHANG UNIV
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