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Directional sound source control device and method for video surveillance

A technology of directional control and video monitoring, applied in the direction of control using feedback, measuring devices, TV system components, etc., can solve the problem of increasing operating algorithm resources, achieve the effects of improving accuracy, suppressing accuracy errors, and saving resources

Active Publication Date: 2016-02-17
HANGZHOU HIKVISION DIGITAL TECH
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Problems solved by technology

But at the same time, in order to more accurately calculate the absolute azimuth to achieve accurate orientation to a specific target, it is necessary to improve the accuracy of the calculation algorithm, but with the continuous improvement of the accuracy of the algorithm, the resources consumed by running the algorithm will also increase

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  • Directional sound source control device and method for video surveillance
  • Directional sound source control device and method for video surveillance

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0034] See figure 1 , the sound source orientation control device for video monitoring in this embodiment includes: sound pickup unit 11 , sound collection unit 12 , orientation calculation unit 13 , angle convergence unit 14 , loop filter unit 15 , and adjustment drive unit 16 .

[0035] The sound pickup part 11 can rotate synchronously with the camera 10 . Wherein, since the sound pick-up part 11 has the characteristic of rotating synchronously with the camera 10, the sound source coordinate system formed by the sound pick-up part 11 can rotate synchronously with the rotation of the camera 10, thereby forming a dynamic sound that rotates synchronously with the camera 10. source coordinate system.

[0036] In practical applications, the sound pickup ...

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Abstract

The invention discloses a directional sound source control device and method for video surveillance. In the directional sound source control device disclosed by the invention, a sound pickup component can synchronously rotate with a camera, so that a dynamic sound source coordinate system capable of synchronously rotating with the camera can be formed, correspondingly, based on the dynamic sound source coordinate system, a calculated azimuth angle is a relative azimuth angle of a sound source relative to a lens normal of the camera, and then, the relative azimuth angle is converged within a preset angle range to achieve closed-loop control of the relative azimuth angle, and a lens visual angle range of the camera traces the direction of the sound source by means of the closed-loop control of the relative azimuth angle. Since a loop gain generated by the closed-loop control of the relative azimuth angle can inhibit a precision error generated by an azimuth angle solution algorithm, the directional sound source control device and method disclosed by the invention can be used for improving the directional accuracy without improving the accuracy of the solution algorithm, so that resources consumed for operating the algorithm can be saved.

Description

technical field [0001] The invention relates to video monitoring technology, in particular to a sound source directional control device and method for video monitoring. Background technique [0002] In video surveillance, it is usually necessary to track a specific target, but since the position of a specific target in the surveillance scene is often dynamically changed, and the viewing angle range of a single camera is difficult to cover all video surveillance scenes, therefore, in order to realize the tracking of a specific target For target tracking, the existing technology provides a full coverage method of the scene, that is, multiple cameras are deployed in the video surveillance scene, so that the viewing angle ranges of multiple cameras are superimposed to cover the entire area of ​​the video surveillance scene. [0003] However, the method of full scene coverage will obviously cause the cost to increase linearly with the number of cameras. Therefore, the prior art a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/18G05D3/12
CPCG01S5/04
Inventor 毛慧陈扬坤俞海
Owner HANGZHOU HIKVISION DIGITAL TECH
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