指向可变的差分波束形成方法、装置、设备及存储介质
By obtaining the cosine values of the target pointing direction and the zero-point direction, and using the algebraic polynomial decomposition method to design the filter weight coefficients, the problem of fixed pointing direction in differential beamforming is solved, flexible adjustment and low-frequency noise suppression are achieved, and the robustness of the speech signal is improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WUHAN HAIWEI TECH CO LTD
- Filing Date
- 2023-06-06
- Publication Date
- 2026-07-17
AI Technical Summary
In existing differential beamforming methods, the pointing direction of the microphone array in the linear array must be the end-fire direction of the array, which cannot be flexibly adjusted, resulting in the masking of the voice signal in the low-frequency band and poor robustness.
By obtaining the cosine values of the target pointing direction and the target zero point direction, the cosine value of the transition zero point direction is determined. The filter weight coefficients are designed using the algebraic polynomial decomposition method to achieve filtering of the microphone linear array sampling signal and output a differential beam with variable direction.
It enables flexible adjustment of the pointing direction of differential beams, improves the robustness of low-frequency speech signals and the ability to suppress environmental noise, and does not increase the computational burden.
Smart Images
Figure CN116682443B_ABST