Sound source localization camera shooting tracking device

Abstract

A sound source localization camera shooting tracking device comprises a cradle head for carrying a camera, a single chip microcomputer and four sound pick-ups, the first sound pick-up, the second sound pick-up and the third sound pick-up are in sequential arrangement along a horizontal straight line, the fourth sound pick-up is positioned right above the second sound pick-up, output ends of the four sound pick-ups are connected with four input ports of the single chip microcomputer respectively via four filters, and a horizontal angle motor and an elevation angle motor of the cradle head are connected with output ports of the single chip microcomputer. According to sound signals picked up by the four sound pick-ups, a time-delay estimation based positioning method is adopted for determining position of a monitored objective, dynamic tracking of a specific objective is achieved, and the device has the advantages of less operation quantity, easiness in implementation, high positioning accuracy and the like. By the device, multi-angle coverage monitoring can be realized only with a single camera, and monitoring capability is enhanced while monitoring cost is saved.

Description

technical field [0001] The invention relates to a sound source positioning camera tracking device based on a generalized cross-correlation algorithm, which can enable a camera to automatically track a monitoring target, and belongs to the field of measurement technology. Background technique [0002] At present, domestic and foreign video monitoring devices can be roughly divided into two types, one is a static monitoring device, and the other is a dynamic monitoring device. The camera of the static monitoring device is fixed, and can only shoot a certain scene, and cannot realize the dynamic tracking of the monitoring target, and its monitoring range is small. There are many kinds of dynamic monitoring devices, and some use the method of rotating the camera at a uniform speed to realize multi-angle monitoring. This kind of monitoring device cannot realize the dynamic tracking of the monitoring target, and the monitoring effect is not ideal; although some monitoring devices ...

AI Technical Summary

Problems solved by technology

It overcomes the problems that the existing sound source-location method cannot effectively realize the three-dimensional space positioning of multiple aliasing sound sources, and there are problems such as inflexible use of positioning methods, unstable estimation results, low precision, and insufficient practicability, etc., but it is applied to Video Surveillance Device Still Inconvenient

[0004] In short, the monitoring range of traditional video surveillance devices is very limited, and multi-angle coverage monitoring cannot be realized. To achieve all-round monitoring, the number of monitoring equipment must be increased, which increases the cost of monitoring equipment

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