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Synchronous flight data and multi-channel video and audio data playback method

A multi-channel audio, video and flight data technology, applied in the field of avionics, can solve the problems of lack of synchronization mechanism, lack of synchronization playback method of flight parameter data, and lack of synchronization of data, achieving the effect of large amount of information

Active Publication Date: 2014-03-19
SHAANXI QIANSHAN AVIONICS
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Problems solved by technology

At present, the ground playback equipment of the flight parameter recording system is relatively independent, and the data playback process does not reflect the characteristics of synchronization. In addition, even if multiple data are played back at the same time, the synchronization between the data is poor, and there is no perfect synchronization mechanism.
In addition, there is a lack of a method for synchronous playback of flight parameter data within the scope of the LAN

Method used

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  • Synchronous flight data and multi-channel video and audio data playback method

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with accompanying drawing, please refer to Figure 1 to Figure 2 .

[0018] The scheme that the present invention adopts is: based on the flight data playback module, the audio data playback module and the video data playback module using the TCP / IP protocol as the underlying communication basis, the sending port and the receiving port of the above three modules are all connected to the TCP / IP communication bus connection, any module in the three modules can be used as the main control module to initiate a synchronous playback command, and the other modules will feed back the ready command after receiving the command, and the main control module will send synchronization time information to each controlled module at regular intervals After the controlled module receives the time information of the main control module, it calculates the time difference between its own playback progress and the...

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Abstract

The invention belongs to the technical field of aviation electronics and particularly relates to a synchronous flight data and multi-channel video and audio data playback method. According to the method, a system structure composed of a main control module and two controlled modules is formed among a flight data playback module, an audio data playback module and a video data playback module, and a TCP / IP protocol is used as an underlying communication basis among the modules. The main control module sends a play time stamp thereof and a system reference time to the controlled modules, and the controlled modules calculates the communication time delay with the use of the system reference time, calculates the play time difference with the use of the play time stamp, calculates the play progress difference by summing the communication time delay and the play time difference and modifies the play progress thereof according to the play progress difference so as to be consistent with the main control module in play progress. The method of the invention enables synchronous playback of flight data, audio data and video data to be realized accurately and stably and can achieve a better visual effect.

Description

technical field [0001] The invention belongs to the technical field of avionics, in particular to a method for synchronous playback of flight data and multi-channel audio and video data. Background technique [0002] With the increase of types of data recorded by flight parameters, comprehensive playback of data in ground support equipment is one of the important needs of users. The synchronous playback of flight data and multi-channel audio and video data can display and play the three kinds of data comprehensively. At present, the ground playback equipment of the flight parameter recording system is relatively independent, and the data playback process does not reflect the characteristics of synchronization. In addition, even if multiple data are played back at the same time, the synchronization between the data is poor, and there is no perfect synchronization mechanism. In addition, there is a lack of a method for synchronous playback of flight parameter data within a lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/43H04N21/8547
Inventor 李申刘华磊乔文
Owner SHAANXI QIANSHAN AVIONICS
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