Low-delay audio signal overdetermined blind source separation method and separation device
A technology for audio signal and blind source separation, applied in speech analysis, instruments, etc., can solve the problem that the system delay cannot be significantly reduced
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Embodiment 1
[0077] figure 2 It is a system block diagram of the real-time blind separation method of audio signal according to the present invention, the method includes short-time Fourier transform 201, sound source variance and demixing matrix calculation 202, mixing matrix estimation module 203, multi-channel Wiener filtering 204 and short-time Fourier transform Inverse Liye Transform 205.
[0078] The present invention provides a low-latency audio signal overdetermined blind source separation method, which includes:
[0079] Short Time Fourier Transform 201
[0080] Perform short-time Fourier transform on each time-domain signal of each to-be-separated sound source in the target environment collected by the microphone array to obtain a corresponding current frame time-frequency domain observation signal; specifically, the short-time Fourier transform Transform 201 respectively to the signal x received by the microphone element m (t) Perform short-time Fourier transform to get X m...
Embodiment 2
[0133] like Figure 4 As shown, the present invention also provides a low-latency audio signal overdetermined blind source separation device, the device comprising:
[0134] The microphone array 401 includes M microphone array elements, which are used to pick up the acoustic signals of N sound sources to be separated in the target environment, and the total number of microphone array elements is required to be greater than the number of sound sources to be separated, that is, M>N; M≥3 ; N≥2;
[0135] The A / D module 402 is configured to convert the acoustic signals (analog signals) of the N sound sources to be separated picked up by the microphone array 401 into corresponding digital signals, so as to be sent to the processor and other devices to execute the relevant separation algorithm ; In the MEMS microphone, the A / D module 402 can be integrated in the microphone.
[0136] The short-time Fourier transform module 403 is used for buffering the signals collected by the micro...
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