Broadband wave beam forming method and apparatus

Abstract

The disclosed forming method for broadband waveform comprises: determining the sub-band signal opposite to the microphone signal, as well as the signal frequency-domain correlation matrix; according to 3D space transmission vector of signal source and former matrix, determining the weight vector for every sub-band signal; then deciding the output signal. This invention combines frequency and space domain for speech process, and improves SNR for wide application.

Description

technical field [0001] The present invention relates to audio processing technology, in particular to a broadband beam forming method and device. Background technique [0002] With the vigorous development of modern science, communication or information exchange has become a necessary condition for the existence of human society, and speech, as the acoustic performance of language, is one of the most natural, effective and convenient means for human to exchange information. [0003] In the process of voice communication, it is inevitable to be interfered by the surrounding environment, the noise introduced by the transmission medium, the electrical noise inside the communication equipment, and even other speakers. These interferences will eventually make the voice received by the voice receiver no longer the pure original voice, but the noisy voice polluted by noise. For example, phones in cars, streets, and airports are often disturbed by strong background noise, which ser...

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Problems solved by technology

[0028] The above-mentioned MVDR beamforming technology can only be applied to narrowband signal sources. When this method is used for broadband signal sources, its speech enhancement performance will be greatly reduced. Moreover, this technology can only be appli

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