Echo elimination method and system based on microphone array
A microphone array, echo cancellation technology, applied in two-way sound reinforcement telephone system, speech analysis, instruments, etc., can solve the problem of affecting the natural call quality of full-duplex communication
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment Construction
[0119] Such as figure 1 As shown, the present invention discloses a microphone array-based echo cancellation method, which specifically includes the following steps:
[0120] Step 1, to the multi-channel input time-domain audio signal x M Carry out framing and short-term time-frequency domain transformation to obtain the frequency domain input signal X n ; The reference signal ref is divided into frames, and the short-time time-frequency transformation is obtained to obtain the frequency-domain reference signal REF n .
[0121] Among them, the short-time time-frequency transform is an overlap-add method short-time Fourier transform (STFT), and the window function selects the Hanning window, and the obtained frequency domain input signal X n As shown in formula (2):
[0122]
[0123]Wherein, k=0,...,N / 2-1; N=2R, R is the frame length; m=0,...,M-1, M is the total number of microphones in the microphone array; n is the frame number. In subsequent steps, k all represent su...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com