Prediction-based low-latency video overlay frame buffer scheduler

Abstract

The invention relates to a prediction-based low-delay video superposition frame buffer scheduler, and belongs to the technical field of character video image processing in display equipment. Accordingto the invention, a frame buffer scheduler is constructed on an FPGA; the frame buffer scheduler adopts technologies of full parallelism, pipeline calculation and the like, adopts a reusable modulardesign method, and mainly comprises a background video buffer unit, a write-in frame buffer scheduling unit, a storage read-write control unit, a background video detection unit, a read-out frame prediction scheduling unit, a foreground video detection unit, a foreground video buffer unit, a video superposition unit and the like. The read-out frame prediction scheduling unit further shortens superposition delay while avoiding frame buffer read-write conflicts through a certain prediction algorithm according to the state information of the write-in frame buffer scheduling unit, the background video detection unit and the foreground video detection unit. The superimposed frame buffer scheduler has the characteristics that superimposed frame tearing is prevented, prediction algorithm parameters can be adjusted and configured on line, superimposed delay is less than 18 milliseconds and the like.

Description

technical field [0001] The invention relates to a prediction-based low-latency video superimposition frame buffer scheduler, which belongs to the technical field of character video image processing in display devices. Background technique [0002] The head-up display superimposes the symbols to be displayed with the video collected by the forward-looking infrared or the pod and then projects them into the driver's front field of view. When performing low-visibility tasks such as night flights, it is very easy for the pilot to obtain external information. Rely heavily on background video overlaid on the HUD. Therefore, the delay characteristics of the superimposed background video greatly affect the flight safety situation. In the traditional superimposed implementation scheme, the video superimposed delay is generally more than 40 milliseconds, which cannot meet the low-latency requirements of the head-up display for superimposed. Contents of the invention [0003] The pu...

AI Technical Summary

Problems solved by technology

Therefore, the delay characteristics of the superimposed background video greatly affect the flight safety situation. In the traditional superimposed implementation scheme, the video superimposed delay is generally more than 40 milliseconds, which cannot meet the low-latency requirements of the head-up display.

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