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A multi-channel video seamless switching system and method based on an FPGA

A seamless switching, multi-channel video technology, applied in the field of video processing, can solve the problems of easy loss of video data, inconvenient operation, poor video output timing stability, etc., to ensure timing stability, improve operating efficiency, and integration. high effect

Active Publication Date: 2019-05-21
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0006] In order to solve the technical problems of poor video output timing stability, easy loss of video data, and inconvenient operation in the existing video switching technology based on digital devices, the present invention provides a multi-channel video seamless switching system and method based on FPGA

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  • A multi-channel video seamless switching system and method based on an FPGA
  • A multi-channel video seamless switching system and method based on an FPGA
  • A multi-channel video seamless switching system and method based on an FPGA

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Embodiment Construction

[0054] The present invention will be further described below in conjunction with accompanying drawing.

[0055] Such as figure 1 As shown, the multi-channel video seamless switching system of the present invention includes hardware and software;

[0056] The hardware includes an FPGA (main controller), N video input interface units connected to the FPGA, a synchronous pulse output interface unit, a video output interface unit and a switching instruction receiving interface unit; N is a positive integer greater than or equal to 2.

[0057] The video input interface unit is used to collect external video signals; the video input interface unit can use the Cameralink video input interface, the chip model is ds90cr286 or ds90cr288; it can also use the PAL video input interface, the chip model is adv7180; or use the SDI video input interface, the chip The model is GS2971; or the digital video LVDS input interface is used, the chip model is ds90lv032; or the RS422 input interface i...

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Abstract

The invention provides an FPGA (Field Programmable Gate Array)-based multi-channel video seamless switching system and an FPGA-based multi-channel video seamless switching method in order to solve thetechnical problems that the existing video switching technology based on a digital device is poor in video output time sequence stability, easy to lose video data and inconvenient to operate. The method comprises the steps of 1) sending synchronous pulse signals; 2) receiving N paths of video data including a video clock signal and video image data; 3) respectively preprocessing the received N paths of video data, so that the subsequent buffer isolation is carried out from the first pixel data of the first frame; 4) respectively buffering and isolating the N paths of video data; The method comprises the steps of (1) inputting video image data into a buffer isolation module, (2) respectively reading buffered and isolated video data, regenerating video enabling, and outputting the regenerated video enabling and the read video image data to a channel selection module, (6) receiving a video channel switching instruction, (7) gating a data channel corresponding to a data channel number, and (8) outputting the video image data by the gated data channel.

Description

technical field [0001] The invention belongs to the technical field of video processing, and relates to an FPGA-based multi-channel video switching system and method. Background technique [0002] With the continuous development of drone technology, more and more drones at home and abroad are equipped with various types of surveillance cameras on the fuselage. Due to the limitation of the telemetry transmission equipment of the drone, that is, the telemetry equipment can only transmit one video signal, and the multi-channel video signal in the entire flight system needs to be monitored and recorded in real time when the drone is flying. Therefore, a multi-channel With the video switching system, during the flight of the UAV, the ground personnel can switch between multiple onboard cameras, monitor the external situation in real time, and take timely solutions to the problems found. [0003] At present, there are two main methods of video switching technology: [0004] The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/268H04N7/18
Inventor 边河杨磊王华伟王华黄继江
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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