Research on the intelligent system of the hd video conference camera

Research on the intelligent system of the hd video conference camera

The video conference is a multimedia communication way of high speed development in recent years. Video conference camera and omni-directional microphone is the input device of the conference system, which plays a pivotal role in the whole system. It is directly aimed at the user and is an important symbol of the performance of a video meeting system. At present, domestic video conference cameras and most of the market share of the microphone are occupied by foreign companies, and domestic conference products are still in the developing stage.

Video conference terminal's high - level and intellectualized is a hot spot for all manufacturers, which is also the inevitable trend of video conference. First for the development and application of video conference, video conferencing terminals in the important role of video conference system, and the development status of high definition video conference cameras, high-definition video conference camera research important content mainly includes the following: Pan/Tiltrotation mechanism, stepper motor control, the two degrees of freedom screen characters superimposed, HDMI hd video interface and external communications, preset point trajectory scanning, image target function and self-learning function, etc.

Pan/Tilt two degrees of freedom rotating mechanism is the main mechanical structure, the smart camera from product design experience both at home and abroad, and combined with the present domestic processing conditions, considering the product stability and cost budget, has carried on the innovation and improvement on the mechanical structure, using 3 d software modeling method to check the metal parts are analyzed.

Stepper motor is widely used in recent years of mechanical power components, stepping motor subdivision control principle, the height of stepping motor subdivision, greatly improves the positioning accuracy, improved the stability of the stepping motor, reduces the noise in motion.

Screen characters menu is to realize the humanized operation the necessary function of video conference, the basic principle of superposition of characters through the screen, the successful design characters overlay scheme, completed the screen menu functions design and debugging.

HDMI is currently one of the mainstream of hd video interface, coding and output principle analysis of the HDMI interface, success will be high-definition simulation through hardware module component into a particular format digital coding output.

The communication mode includes both wired and wireless modes. In this paper, serial communication is used as the wired communication mode, which integrates the command code format and decoding process of various common protocols. Based on infrared remote control, the infrared pulse width modulation principle and infrared decoding method are analyzed.

Preset point function and self learning track scan function has important application in video conference camera, through analysis and comparison, discovered the main way to improve the preset point precision, self learning path storage optimization design method is proposed.

The target positioning is a new and practical intelligent function, which satisfies the user's demand for the quick selection of the video screen target. The essence of this function is to establish corresponding relationship of the designated space coordinates and the pixel coordinates, middle involves the coordinate system conversion, camera model, as well as meeting some theories, such as camera calibration based on the research of these theories, the other a to simplify PTZ camera calibration method, and finally realize the target function.