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Finite sound source multi-channel sound field system and sound field analogy method

A multi-channel, sound field technology, applied in stereo systems, electrical components, etc., can solve problems such as loss of application value and non-Gaussian properties of the system, and achieve the effect of reducing the phase distortion of the sound field, avoiding intermodulation interference, and avoiding distortion.

Inactive Publication Date: 2007-07-18
COMMUNICATION UNIVERSITY OF CHINA
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Problems solved by technology

However, in the current application of statistical methods in the study of sound source separation, there is a limitation of assuming that the noise signal is Gaussian white noise
Therefore, the existing research on sound source separation can only be regarded as a kind of signal enhancement research, and when the signal noise is the interference of other sound sources (such as musical instruments), the existing solutions lose their application value due to the non-Gaussian nature of the system

Method used

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  • Finite sound source multi-channel sound field system and sound field analogy method
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  • Finite sound source multi-channel sound field system and sound field analogy method

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Embodiment Construction

[0045] Referring to FIG. 1 , it is a schematic structural diagram of the system described in the embodiment of the present invention.

[0046] The system described in the embodiment of the present invention includes: a microphone array 1 with multiple microphones, a speaker array 5 with multiple speakers, and also includes: an audio collection subsystem 2 , a server 3 , and an audio reproduction subsystem 4 .

[0047] in,

[0048] The audio acquisition subsystem 2 is used to perform analog-to-digital conversion on the various audio signals collected from the microphone array, and mark the converted audio data with the acquisition channel number and time stamp, package and send it;

[0049] Server 3 is used to receive and analyze the audio data packets sent by the audio acquisition subsystem during the sound field acquisition process, convert the audio data collected from each microphone array into different single sound source data, and convert the converted single sound sourc...

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Abstract

This invention relates to a multichannel sound field system with limited sound sources and an analog method for sound field including: a microphone array used in recording M paths of audio information and detecting the sound field property, an audio collection subsystem used in A / D conversion of each channel audio information, packing audio data, channel number and timestamps, a server processing audio data of the microphones, finishing separation and process of sound source and compressing and storing the data and mixing the sound source data and converting them to the output data and control signals of N paths of loudspeakers, an audio recovery subsystem forming multichannel analog signals with the audio data of different sound sources and controlling synchronization of the loudspeakers and a loudspeaker array used in playing N paths of audio signals.

Description

technical field [0001] The invention relates to audio collection and restoration technology, in particular to a limited sound source multi-channel sound field system. Background technique [0002] Music is an important part of the history of human civilization. Since the invention of recording technology, people have been trying to record its beautiful melody faithfully. Acoustic reproduction technology has experienced the development from monophonic to dual-channel, five-channel and more channels. One of the goals that has always been pursued is to reproduce the original sound field or sense of space more realistically. Compared with two-channel stereo, although the multi-channel system has enabled people to obtain wonderful and extraordinary listening enjoyment, in fact, such a system cannot restore the sound source without distortion, and there are sound field phase distortion and sound source distortion. Issues such as intermodulation interference and dynamic range com...

Claims

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Application Information

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IPC IPC(8): H04S7/00H04S3/00
Inventor 张勤刘剑波王京玲蔡娟娟
Owner COMMUNICATION UNIVERSITY OF CHINA
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