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

A technology of video superimposition and frame buffering, which is applied in the field of character video image processing, can solve the problems that the delay characteristics of the superimposed background video affect the safety of the flight, and cannot meet the requirements of the low-delay superimposition of the head-up display, so as to prevent tearing and superimposition The effect of small delay

Active Publication Date: 2022-01-04
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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  • Application Information

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.

Method used

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

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Embodiment Construction

[0027] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0028] The specific implementation of the present invention is as figure 1 As shown, the frame buffer scheduler is composed of background video buffer, write frame buffer scheduling, storage read and write control, background video detection, read frame prediction scheduling, foreground video detection, foreground video buffer and video overlay and other units. For the connection relationship between modules and the signal flow direction, see figure 1 .

[0029] The architecture of the prediction-based low-latency video overlay frame buffer scheduler system in this embodiment is as follows: figure 2 shown. The solid line in the figure indicates the transmission process of the continuous video stream signal, the dotted line indicates the transmission process of the video line number information, the thick arrow indicates the transmission ...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/265H04N5/262H04N5/445
CPCH04N5/265H04N5/262H04N5/445
Inventor 牛盼情赵惠惠李绪金
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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