Airborne multipath audio and video synchronization recorder and recording method

Abstract

The invention discloses an airborne multipath audio and video synchronization recorder and a recording method, the recorder comprises a motherboard unit, a channel selector switch and a compression record unit, the motherboard unit comprises a DSP core controlling and data processing circuit and a compression record module slot used for connecting the compression record unit, the channel selector switch receivers multipath video signals, and the multipath video signals are subjected to time sharing multiplexing into a video differential signal and then sent to the motherboard unit, the motherboard unit receives a GPS time signal and a flight signal sent by a RS 422 bus connection integrated information processing machine, the DSP core controlling and data processing circuit performs sequential control, and then the GPS time signal and the flight signal are sent to the compression record unit, and the compression record unit is connected to a memory cell. The airborne multipath audio and video synchronization recorder has the advantages of small volume, low cost and simple structure, and can realize synchronous record and playback of the airborne multipath audio and video.

Description

technical field [0001] The invention belongs to the technical field of video processing, and in particular relates to an airborne multi-channel audio and video synchronous recorder and a recording method. Background technique [0002] The recording and playback of airborne multi-channel audio and video is an important task of the airborne objective inspection system. The video signal and the voice signal of the internal and external calls are recorded, and then the recorded audio and video files are played back and analyzed in the ground workstation to guide flight training or comprehensively evaluate and judge the flight. At present, most airborne multi-channel audio and video recorders use multi-channel parallel processing, and generally require multiple devices. figure 1 It is a typical composition diagram of an airborne multi-channel audio and video recorder. The multi-channel analog audio and video signals from the carrier are sampled by the A / D chip, converted into st...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the existing airborne multi-channel audio and video synchronous recorder and recording method cannot satisfy the synchronization problem of multi-channel video and recording time stamp, on-board flight parameters, bus, and task data recording information, the present invention provides an airborne multi-channel Audio and video synchronization recorder, which can ensure the synchronization of multi-channel video and recording time stamp, on-board flight parameters, bus, and mission data recording information

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