A Synchronization Method of Video Voice Data and Flight Test System Time
A technology of video voice and test system, applied in transmission systems, electrical components, etc., can solve problems such as low step accuracy
Active Publication Date: 2014-11-12
CHENGDU AIRCRAFT INDUSTRY GROUP
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Problems solved by technology
low step accuracy
Method used
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[0029] The method flow ends in step S108.
[0031] Fig. 3 is a schematic diagram of the video voice data frame header used in the present invention. Video voice data frame header consists of information
[0035] The video voice test system CPU module D401 responds to the interrupt, and reads the time code through the bus in the interrupt function.
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The invention discloses a method for synchronizing video voice data and flight test system time, comprising the following steps: the flight test system provides time to the video voice test system; the video voice collection module collects video voice data according to the time sequence of the time service, and generates an interrupt signal; CPU The module responds to the interrupt signal, obtains the time code, and organizes the video audio data frame containing the time code for the terrestrial video audio player to read to obtain the time code. The terrestrial video audio player superimposes the time icon on the main image during playback. Therefore, the time synchronization accuracy of the present invention is high, and at the same time, the ground video and voice player can flexibly change the superimposition mode of the time icon on the main image, and when analyzing the archived video data after the flight test, the flight test engineer can directly use the time index, so that when analyzing a specific time It is easy to retrieve the segmented video data, which is also conducive to the comprehensive analysis of other flight test data, and improves the efficiency of flight test data analysis and processing.
Description
A method for synchronizing video voice data and flight test system time Technical field The present invention relates to a kind of synchronous method of video voice data and flight test system time, belongs to aircraft flight test test technical fields. Background technique The flight test system has many subsystems, the video voice test system (VIDEO-AUDIOACQUIRESYSTEM, VADS for short) is one of the important subsystems, and the video and voice data of VADS include two multi-function displays MFD (MultiFunction Display), one head-up display HUD (HeadUpDisplay), one cockpit alarm board analog video The data used by video images and 1-2 channels of voice signals; among them, MFD has flight control, avionics, radar, weapons, plug-ins, automatic The data and status information of the dynamic pilot, inertial navigation and other systems; the HUD has the visual image data in front of the cockpit and the aircraft flight Altitude, speed, Mach number, angle of attack, side...
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Inventor 冯茂霖
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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