A low-latency video overlay frame buffer scheduler based on prediction

Abstract

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. The present invention constructs a frame buffer scheduler on the FPGA. The frame buffer scheduler adopts technologies such as full parallelism and pipeline computing, and can reuse a modular design method, mainly including background video buffer, write frame buffer schedule, storage read and write Units for control, background video detection, readout frame prediction scheduling, foreground video detection, foreground video caching, and video overlay. The readout frame prediction scheduling unit further shortens the overlay delay while avoiding frame buffer read and write conflicts through a certain prediction algorithm according to the state information of the three units of writing frame buffer scheduling, background video detection and foreground video detection. The superimposed frame buffer scheduler of the present invention has the characteristics of preventing tearing of the superimposed picture, predictive algorithm parameters can be adjusted and configured online, superimposed delay 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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