Dynamic video tracking system based on sound source positioning

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 ...

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 monitoring range, which undoubtedly greatly increases the monitoring cost and loses the main value of video tracking monitoring

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