Method for controlling microphone sound recording, digital audio signal processing method and apparatus

Abstract

The present invention discloses a microphone sound recording control method, a sound source positioning method, a digital audio signal processing method and a corresponding device thereof. The invention is used for increasing the sound recording effect of digital device. The microphone sound recording control method provided by the invention comprises the following steps: obtaining the distance from the target sound source to the microphone array in the sound recording process of microphone array; and adjusting the included angle two microphones in the microphone array. The sound source positioning method provided by the invention comprises the following steps: obtaining the distance from the target sound source to the microphone array in the sound recording process of microphone array; confirming the sound pick-up angle of microphone array according to the obtained distance; respectively confirming the maximum crosscorrelation values of audio signals received by two microphones in the microphone array; and confirming the sounding probability of target sound source according to the ratio between the maximum crosscorrelation value confirmed in the range of sound pick-up angle and the maximum crosscorrelation value confirmed outside the range of sound pick-up angle.

Description

technical field [0001] The present invention relates to the technical field of audio signal processing, in particular to a method for controlling microphone recording and its device, a sound source localization method and its device, and a digital audio signal processing method and its system. Background technique [0002] At present, the technology of recording based on microphone equipment has been widely used. In many digital equipment (such as cameras and DV equipment), microphone arrays are usually installed to record audio and video synchronously with video equipment. [0003] Some of the current digital devices have integrated the zoom microphone function. The zoom microphone is characterized by a microphone array composed of two or more microphones. As the target sound source gets closer, the pickup angle can increase. The recording sensitivity will decrease, on the contrary, as the target sound source gets farther away, the pickup angle can be reduced, and the recor...

AI Technical Summary

Problems solved by technology

However, the zooming ability of this zooming method is very limited, so that the recording effect cannot be improved.

[0006] At the same time, after the current digital equipment processes the recorded analog audio signal into a digital audio signal, the processing of the digital audio signal does not consider the influence of the target sound source from being far or near, so that the final played Recording can not achieve the desired effect

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