Microphone array beamforming method and device
A microphone array and beam technology, applied in frequency/direction characteristic devices, speech analysis, instruments, etc., can solve the problems of poor sound source positioning accuracy, achieve the effects of solving poor accuracy, improving performance, and realizing estimation
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Embodiment 1
[0033] In this embodiment, a microphone array beamforming method is provided, figure 1 is a flowchart of a microphone array beamforming method according to an embodiment of the present invention, such as figure 1 As shown, the process includes the following steps:
[0034] Step S101, using fixed beamforming to enhance the speech signal in the selected direction of the microphone array;
[0035] Step S102, using a neural network to evaluate the speech quality of the speech signal in the selected direction after beamforming;
[0036] Step S103, rotating the beam in the selected direction by a predetermined angle to form multiple beams in fixed directions to enhance the voice signals in the multiple fixed directions, and using the neural network to analyze the voice signals in the multiple fixed directions The voice quality of the signal is evaluated;
[0037] Step S104, determining the sound source direction of the microphone array based on the evaluation results of the speec...
Embodiment 2
[0057] In this embodiment, a microphone array beamforming device is also provided, and the device is used to implement the above embodiments and preferred implementation modes, and what has been explained will not be repeated here. As used below, the term "module" may be a combination of software and / or hardware that realizes a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.
[0058] image 3 is a structural block diagram of a microphone array beamforming device according to an embodiment of the present invention, such as image 3 As shown, the device includes a beamforming module 10 , a first evaluation module 20 , a second evaluation module 30 , a decision module 40 , and an output module 50 .
[0059] The beamforming module 10 is configured to use fixed beamforming to enhance speech signals i...
Embodiment 3
[0075] In order to facilitate the understanding of the technical solutions provided by the present invention, the following will describe in detail in conjunction with embodiments of specific scenarios.
[0076] Speech signal processing technology is a key technology in the field of human-computer interaction today, and microphone array beamforming can use spatial domain information to better enhance speech signals, which plays an extremely important role in back-end speech recognition. key technologies.
[0077] Current conventional microphone array beamforming methods such as Figure 5 as shown, Figure 5 is a flowchart of a conventional microphone array beamforming method according to an embodiment of the present invention, as Figure 5 As shown, the process includes the following steps:
[0078] Step S501, estimating the direction of the sound source to obtain the direction of the target sound source;
[0079] Step S502, forming a steering vector, and using the steerin...
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