FPGA-based video stream character overlay processing system and processing method

A character superposition and processing method technology, applied in the field of FPGA video processing, can solve the problems of short working life of the display and rigid display effect, and achieve the effect of reducing damage and reducing damage

Inactive Publication Date: 2019-08-16
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the technical problem that the existing FPGA character overlay method displays characters at a fixed position for a long time, which leads to short working life of the display and stiff display effect, and provides an FPGA-based video stream character overlay processing system and processing method

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  • FPGA-based video stream character overlay processing system and processing method
  • FPGA-based video stream character overlay processing system and processing method
  • FPGA-based video stream character overlay processing system and processing method

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] An FPGA-based video stream character superimposition processing system, including: monitoring the row and column coordinate position of the original video stream data, and finding the row and column position monitoring module of the character superposition position; character bitmap information stored on the FPGA chip, and outputting character information according to character selection parameters The character ROM module; calculate the character transparency calculation module and the background transparency calculation module of the superimposed pixel code value according to the transparency parameter, the brightness parameter and the video data; use the calculated pixel code value to replace the character superimposition module and the background of the original pixel code value A superimposition module; a timeout blanking module for timing, opening or clos...

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Abstract

The invention relates to an FPGA-based video stream character overlay processing system and processing method, and belongs to the field of FPGA video processing technology. The method solves the technical problems that the existing FPGA character overlay method displays characters at a fixed position for a long time, which leads to short working life of the display and stiff display effect. The FPGA-based video stream character overlay processing system of the present invention is provided with a character ROM module on the FPGA chip, which is used to store all character information required in the display process, without using large-capacity external storage devices, and utilizing FPGA multiplier resources and pipelines The processing technology realizes real-time superimposition of character information with variable transparency on the video stream. The FPGA-based video stream character superimposition processing method of the present invention can complete real-time superposition of characters on the video stream data, dynamically adjust the content and position of superimposed characters, clearly display characters by adjusting transparency and brightness, and reduce long-term characters by blanking overtime characters. The fixed characters of the time display will cause damage to the display device.

Description

technical field [0001] The invention relates to the technical field of FPGA video processing, in particular to an FPGA-based video stream character overlay processing system and processing method. Background technique [0002] With the wide application of video technology, video character superposition technology has also obtained unprecedented development. Video character overlay is to display character information at a specific position of the video image and provide auxiliary prompt information. At present, the superposition of video characters is usually implemented by a single-chip microcomputer, which controls the display of characters at a specific position according to the input video synchronization signal. This method is mostly used to process analog video signals, and the hardware circuit is relatively complicated. Due to the strict requirements of synchronous timing, the reliability of single-chip microcomputer implementation is poor. The emergence of a dedicat...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H04N5/278H04N21/431
CPCH04N5/278H04N21/4314
Inventor李汉清李丙玉刘建卓
OwnerCHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI