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Jitter control method and device for video transmission system based on ARINC818 protocol

A video transmission system and protocol technology, applied in the field of aviation video transmission, can solve the problems of jitter and instability of aviation video, and achieve the effect of ensuring stability

Inactive Publication Date: 2018-12-25
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a jitter control method and device for a video transmission system based on the ARINC818 protocol, which is used to solve the problem of instability caused by jitter during the transmission of aerial video in the prior art

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  • Jitter control method and device for video transmission system based on ARINC818 protocol
  • Jitter control method and device for video transmission system based on ARINC818 protocol
  • Jitter control method and device for video transmission system based on ARINC818 protocol

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Embodiment Construction

[0019] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0020] In order to control the jitter of the ADVB message, the ARINC818 protocol stipulates a total of 12 levels from A1 to D3. Among them, the D3 level is the strictest and has zero jitter. The C2 level allows jitter in the form of idle lines between images, and there is no jitter inside the image. The idle line refers to the empty line attached at the end of the image without any image data and used to control the transmission timing. . The number of free rows has a default value and can be adjusted dynamically. Therefore, the present invention is designed according to the C2 level.

[0021] Such as figure 2 As shown, the present invention proposes a jitter control method for sender transmission messages in a video transmission system based on the ARINC818 protocol, comprising the following steps:

[0022] 1) Real-time detection of th...

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Abstract

The invention relates to a jitter control method of a video transmission system based on an ARINC818 protocol, a device for detecting, in real time, the capacity of video data to be transmitted storedin a buffer area, when the capacity is lower than the set lower limit value, a line of idle lines is added at the end of the image of the current frame to be transmitted, and when the capacity is higher than the set upper limit value, a line of idle lines is deleted at the end of the image of the current frame to be transmitted, and an image frame of which a line of idle lines is added or deletedis transmitted. The invention calculates the capacity of storing the video data to be transmitted in the buffer area, compares whether the capacity exceeds the set upper limit value and the lower limit value, and ensures the stability of the transmitted image frame according to deleting or adding an idle line at the end of the image of the current frame to be transmitted.

Description

technical field [0001] The invention belongs to the technical field of aerial video transmission, and in particular relates to a shaking control method and device of a video transmission system based on the ARINC818 protocol. Background technique [0002] ARINC818, also known as Avionics Digital Video Bus, was officially released by the Avionics Electronics Council (AEEC) in January 2007 to meet the key digital video transmission requirements in avionics systems. [0003] The ARINC818 protocol is a dedicated image transmission protocol for avionics systems based on the Fiber Channel-Audio Video protocol (FC-AV). The content of the FC-AV protocol is simplified to solve the problem of integrated avionics system display The long-distance transmission and practical problems of system images such as multi-function displays and helmet-mounted displays after the mode changes belong to a new type of airborne communication protocol. [0004] In the ARINC818 protocol, a frame of vide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L12/40
CPCH04L12/40H04L2012/4028H04L65/762H04L65/65
Inventor 陈水忠孙文中
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC