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Multi-channel video synchronous switching system and method based on FPGA

A video switching and synchronous switching technology, which is applied to the components of TV systems, TVs, color TVs, etc., can solve problems such as waste of resources, and achieve the effect of reducing the difficulty of PCB design and shortening the development and debugging cycle

Active Publication Date: 2020-12-18
DALIAN JIECHENG TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] In view of the deficiencies in the prior art above, the purpose of this application is to provide a multi-channel video synchronous switching system and method, aiming to solve the problem of wasting resources by buffering multiple video channels together when multi-channel video synchronous switching in the prior art The problem is to dynamically configure the permission of each video to access DDR according to the video source currently being displayed and the target video source to be switched. Only the video streams that are being displayed and will be displayed are allowed to access DDR, and the occupation of DDR by idle video streams is disabled. , to improve memory optimization utilization when multi-channel video synchronization

Method used

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  • Multi-channel video synchronous switching system and method based on FPGA
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  • Multi-channel video synchronous switching system and method based on FPGA

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Embodiment Construction

[0036] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Preferred embodiments of the application are shown in the accompanying drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the application more thorough and comprehensive.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terminology used herein in the description of the application is only for the purpose of describing specific embodiments, and is not intended to limit the application.

[0038] Embodiments of the present application described below are all based on FPGA...

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Abstract

The invention relates to a multi-channel video synchronous switching system and method based on an FPGA. The system comprises an arbitration module, a video matrix module, two frame synchronization modules and a video synchronization switching module. According to the method, when N paths of videos need to be synchronously switched, permission for accessing DDR of each path of video only needs tobe dynamically configured according to a currently displayed video source and a to-be-switched target video source, only a currently displayed video stream and a to-be-displayed video stream are allowed to access the DDR, and occupation of the DDR by idle video streams is closed; therefore, memory optimization utilization during multi-channel video synchronization is improved. After switching is finished and before a new video switching instruction comes, only frame synchronization needs to be carried out on the currently displayed video, that is, when no switching instruction exists, only onepath of video is allowed to access the DDR, and the use of the DDR is saved.

Description

technical field [0001] The invention relates to the technical field of video switching, in particular to an FPGA-based multi-channel video synchronous switching system and method. Background technique [0002] A very important part in the broadcasting control of radio and television is the switching between different video sources. Whether it is multi-camera switching when recording a program or video insertion during broadcasting, an essential part of it is unified frame synchronization, which is to ensure that all video streams remain aligned during video switching. Write asynchronous multi-channel video into the cache, and read multiple channels of video from the same coordinate position at the same time, and keep at least two frames of space reserved for each video cache to divide the read-write partition, so that at any time Switching will not cause video loss or screen tearing. [0003] Usually, it is necessary to use DDR SDRAM (Double Data Rate SDRAM, double-rate sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/268H04N5/907
CPCH04N5/268H04N5/907
Inventor 程鹏王子明
Owner DALIAN JIECHENG TECH CO LTD
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