Video Recording Device with SD Video Depth Detection

Abstract

The invention discloses a video recording device with standard definition video depth detection function. Send it to the FPGA chip, and write the field synchronization lock state, color carrier frequency lock state and field frequency state into the register at the same time; the FPGA chip is used to first detect whether there is a valid digital video input, and if so, from the SD video decoding chip register. Read out the vertical synchronization lock status, the color carrier frequency lock status and the vertical frequency status to judge the original format of the digital video. The video recording device provided by the invention can perform in-depth detection on the standard definition video input to the aviation record loader, accurately determine the type of the standard definition video, and improve the testability and maintainability of the aviation record loader.

Description

technical field [0001] The invention belongs to the field of electronic engineering, and relates to a video recording device with a standard-definition video depth detection function. Background technique [0002] Video recording equipment is a professional equipment widely used in various fields. The driving recorder records the driving video, the urban sky eye monitoring system records the daily operation of the city, and the aviation record loader is used to record the flight situation of the aircraft... , Video recording has penetrated into all aspects of human activities, providing necessary services and guarantees for people's daily work and life. [0003] Such as figure 1 As shown, the interior of the video recording device can be roughly divided into four parts: the video acquisition unit, the video compression unit, the scheduling unit, and the storage unit. The video acquisition unit collects the original video and performs digital conversion. The video compressio...

AI Technical Summary

Problems solved by technology

[0012] The above two methods can generally obtain the basic situation of the input standard-definition video, that is, whether there are two states of the input video, but the format of the input video cannot be further judged, and the characteristic information of the input video cannot be obtained, resulting in failure. It is difficult to deeply analyze the problem and locate the cause of the fault in a timely and accurate manner, which greatly reduces the testability and maintainability of the aviation record loader. Therefore, a method for in-depth detection of standard definition video is urgently needed

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