Title:
SOUND SOURCE ORIENTATION CONTROL APPARATUS AND METHOD FOR VIDEO SURVEILLANCE
Document Type and Number:
WIPO Patent Application WO/2016/019768
Kind Code:
A1
Abstract:
Disclosed are a sound source orientation control apparatus and method for video surveillance. In the present invention, a sound pickup component is capable of rotating synchronously with a camera, and thus a dynamic sound source coordinate system rotating synchronously with the camera can be formed. Accordingly, an azimuth angle obtained by resolving on the basis of the dynamic sound source coordinate system is a relative azimuth angle of a sound source with respect to a lens normal of the camera. Further, closed-loop control on the relative azimuth angle can be realized by converging the relative azimuth angle into a preset angle range, and the direction of the sound source is tracked by a lens viewing angle range of the camera through closed-loop control on the relative azimuth angle. Because loop gain generated in closed-loop control on the relative azimuth angle can suppress precision errors generated in an azimuth angle resolving algorithm, the present invention can improve the accuracy of orientation without improving the precision of the resolving algorithm, so that resources consumed for running the algorithm can be saved.
Inventors:
MAO HUI (CN)
CHEN YANGKUN (CN)
YU HAI (CN)
CHEN YANGKUN (CN)
YU HAI (CN)
Application Number:
PCT/CN2015/082570
Publication Date:
February 11, 2016
Filing Date:
June 26, 2015
Export Citation:
Assignee:
HANGZHOU HIKVISION DIGITAL TEC (CN)
International Classes:
G01S5/04; H04N5/225
Foreign References:
| CN200962629Y | 2007-10-17 | |||
| CN103365404A | 2013-10-23 | |||
| CN101771814A | 2010-07-07 | |||
| CN101511000A | 2009-08-19 | |||
| US20110097054A1 | 2011-04-28 | |||
| CN103235287A | 2013-08-07 |
Attorney, Agent or Firm:
KANGXIN PARTNERS,P.C. (CN)
北京康信知识产权代理有限责任公司 (CN)
北京康信知识产权代理有限责任公司 (CN)
Download PDF: