信号滤波方法及装置、存储介质、电子装置
By using Fourier transform and adaptive filtering techniques to separate the target signal and interference signal, the problem of incomplete separation of residual interference is solved when the number of microphones is less than 4, achieving better interference suppression and improving the performance of intelligent voice devices.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZTE CORP
- Filing Date
- 2021-05-26
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, residual interference in the target signal is not completely separated. Especially when the number of microphones is less than 4, the interference suppression effect drops sharply, affecting the performance of smart voice terminals and mobile communication devices.
The time-domain data acquired by the microphone is converted into a frequency-domain signal by Fourier transform, the target signal and interference signal are separated, the signal-to-interference ratio and threshold are determined, and an adaptive filter is used for filtering to obtain a clean target signal.
It improves the accuracy of the adaptive filter in predicting interference, effectively suppresses interference signals, enhances the wake-up rate and recognition rate of smart voice devices, and improves the voice call experience.
Smart Images
Figure CN115481649B_ABST