
基本信息:
- 专利标题: 音频波束形成
- 专利标题(英):Audio beamforming
- 申请号:CN201080033006.9 申请日:2010-07-22
- 公开(公告)号:CN102474680A 公开(公告)日:2012-05-23
- 发明人: R.M.M.德克斯
- 申请人: 皇家飞利浦电子股份有限公司
- 申请人地址: 荷兰艾恩德霍芬
- 专利权人: 皇家飞利浦电子股份有限公司
- 当前专利权人: 皇家飞利浦有限公司
- 当前专利权人地址: 荷兰艾恩德霍芬
- 代理机构: 中国专利代理(香港)有限公司
- 代理人: 刘红; 刘鹏
- 优先权: 09166297.3 2009.07.24 EP
- 国际申请: PCT/IB2010/053335 2010.07.22
- 国际公布: WO2011/010292 EN 2011.01.27
- 进入国家日期: 2012-01-20
- 主分类号: H04R3/00
- IPC分类号: H04R3/00
An audio beamforming apparatus comprises a receiving circuit (103) which receives signals from an at least two-dimensional microphone array (101). A reference circuit (105) generates reference beams and a combining circuit (107) generates an output signal corresponding to a desired beam pattern by combining the reference beams. An estimation circuit (109) generates a direction estimate by determining angles corresponding to local minima for a power measure of the output signal in at least a first and respectively second angle interval. The direction estimate is generated by selecting one of the angles. The combining circuit (107) determines combination parameters to provide a notch in an angle corresponding to the direction estimate and a minimization of a directivity cost measure where the directivity cost measure is indicative of a ratio between a gain in the first direction and an energy averaged gain.
公开/授权文献:
- CN102474680B 音频波束形成 公开/授权日:2015-08-19