Dynamic video tracking system based on sound source positioning

A technology of video monitoring system and sound source location, which is applied in closed-circuit television system, parts of TV system, TV, etc. It can solve the problems of increasing monitoring cost and losing the main value of video tracking and monitoring, and achieve the effect of reducing production cost

Inactive Publication Date: 2012-09-26
ZHENGZHOU UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

If you only rely on this monitoring solution for video tracking, you must first achieve full coverage of the camera monit

Method used

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  • Dynamic video tracking system based on sound source positioning
  • Dynamic video tracking system based on sound source positioning
  • Dynamic video tracking system based on sound source positioning

Examples

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Embodiment Construction

[0021] As shown in the accompanying drawing, a dynamic video surveillance system based on sound source location includes four microphones, which convert the collected audio signals into analog signals and input them to the audio acquisition module; the audio acquisition module converts the analog signals output by the microphones into Convert it into a digital signal and transmit it to the DSP digital signal processor; the DSP digital signal processor extracts the algorithm program from the Falsh module through the external memory interface, processes the signal from the audio acquisition module to obtain the azimuth and control signal, and outputs the azimuth through the EMIF Angle and control signal to the UART module to convert the parallel control signal output by DSP, and then realize signal transmission with the FPGA module; phase-locked loop, so that the clock synchronization of each audio acquisition module; FLASH module, to the DSP digital signal processing device...

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Abstract

The invention discloses a dynamic video tracking system based on sound source positioning. The dynamic video tracking system comprises a plurality of microphones, an audio acquisition module, a digital signal processor (DSP), a phase-locked loop, a flash module, a field programmable gate array (FPGA) module and a synchronous dynamic random access memory (SDRAM) module. In order to overcome the defects of the conventional video tracking monitoring technology, an audio signal is acquired by a microphone array which consists of a plurality of microphones, transmitted to the audio acquisition module and subjected to analog to digital (A/D) conversion; a corresponding digital signal is transmitted to the DSP, and an azimuth angle and a control signal are obtained by processing operation through a relevant algorithm program, transmitted to a universal asynchronous receiver/transmitter (UART) and subjected to parallel-serial conversion; and the control signal is transmitted to a stepping motor and a holder, so tracking shooting of a target sound source can be realized. Compared with the prior art, the dynamic video tracking system has the advantages that a small number of cameras are required to be installed, a monitoring area is ensured, and production cost can be reduced.

Description

technical field [0001] The invention relates to a video tracking device, in particular to a microphone array-based video tracking device. Background technique [0002] In today's daily life, cameras are almost everywhere in schools, public places, roadsides, shopping malls, and communities. Surveillance cameras play an indispensable role in protecting the public's personal and property safety, maintaining public order, and promoting traffic safety. . But pay attention to observation and we can find that most of these cameras are fixed. Even if a few cameras can rotate automatically, they are still aimed at a certain direction within a certain unit of time. People with ulterior motives can do it as long as they grasp his rotation cycle. Dodge the camera. That is to say, the monitoring position of the traditional camera is static and can only monitor a limited range of positions. Such a monitoring system has a narrow range of monitoring azimuths, and it is inevitable that ...

Claims

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Application Information

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IPC IPC(8): H04N7/18H04N5/232
Inventor 李磊梁伟周洲李勇李懿平王浩
Owner ZHENGZHOU UNIV
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