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Audio signal separating device and operation method thereof

A technology of audio signal and separation device, applied in voice analysis, transducer circuit, instrument, etc., can solve problems such as spatial aliasing, and achieve the effect of improving signal-to-noise ratio

Inactive Publication Date: 2011-03-30
SPRING FOUND OF NCTU
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Problems solved by technology

[0004] Due to the deficiencies in the above-mentioned prior art, the object of the present invention is to provide an audio signal separation device and its operating method to solve the spatial aliasing effect caused when two microphones record voice signals
The receiving unit is used to receive the mixed audio signal

Method used

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  • Audio signal separating device and operation method thereof
  • Audio signal separating device and operation method thereof
  • Audio signal separating device and operation method thereof

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Embodiment Construction

[0032] refer to figure 1 , figure 1 is a schematic diagram of the audio signal separation device of the present invention. In the figure, the audio signal separation device 1 includes a receiving unit 11 , a first buffer unit 12 , a second buffer unit 13 , a noise reduction unit 14 , a learning unit 15 , an audio signal separation unit 16 and an output unit 17 .

[0033] The receiving unit 11 is a microphone for receiving the mixed audio signal 111 . The mixed audio signal 111 may be audio signals from multiple signal sources, and since only one microphone is used to receive the mixed signal, no spatial aliasing effect will be generated.

[0034] The first buffer unit 12 is connected to the receiving unit 11 and stores the mixed audio signal 111 as a first mixed audio signal 121 . The second buffer unit 13 is connected to the receiving unit 11, and stores the mixed audio signal 111 as the second mixed audio signal 131. The buffer capacity of the second buffer unit 13 is les...

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Abstract

The invention discloses an audio signal separating device and an operation method thereof. The audio signal separating device simultaneously uses two mechanisms of blind signal separation and noise suppression and only uses a microphone to record a mixed sound signal. By adopting a mode of simultaneously carrying out the blind signal separation on the signal subjected to the noise suppression processing and the recorded sound signal, the space aliasing effect generated by using a plurality of groups of recording signals can be avoided, voice fragments lost by noise suppression processing can be also effectively reduced and people having auditory handicap can be helped to separate a target language.

Description

technical field [0001] The present invention relates to an audio signal separation device and an operating method thereof, more specifically, to an audio signal separation device using two mechanisms of blind signal separation (Blind Signal Separation, BSS) and noise reduction (Noise Reduction) and its How to do it. Background technique [0002] In daily life, there are always various noises, such as echoes and reverberations, but these noises will interfere with the sound signal. When the sound signal is interfered by an interference source, the quality of the sound signal will be degraded. For people who use hearing aids or artificial ears, it is difficult for the hearing-impaired to identify the desired sound in a noisy environment, except for noise suppression or separation. Therefore, the noise suppression algorithm based on processing digital signals has gradually been paid attention to in order to obtain clearer sound. [0003] In order to obtain a clearer sound, m...

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Application Information

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IPC IPC(8): G10L21/02H04R3/00G10L21/0272
Inventor 李宜轩蔡德明
Owner SPRING FOUND OF NCTU
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