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A video frame preprocessing chip

A preprocessing and video frame technology, which is applied in the field of video frame preprocessing chips, can solve the problems of video signal video frame preprocessing chip preprocessing, signal strength reduction, video frame processing efficiency reduction, etc.

Active Publication Date: 2021-09-10
南昌理工学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the filter circuit will reduce the signal strength, so that some parts of the video signal with low strength cannot be effectively preprocessed by the video frame preprocessing chip
In order to avoid additional interference caused by hardware circuits, the existing solution is usually to enhance the video signal through software during the preprocessing process. operation, resulting in reduced processing efficiency of video frames

Method used

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  • A video frame preprocessing chip
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  • A video frame preprocessing chip

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Embodiment Construction

[0014] refer to Figure 1-4 , a specific embodiment of the present invention includes a preprocessing module 1, the input end of the preprocessing module 1 is connected in parallel with a signal filtering module 2 and a current injection module 3, and the signal filtering module 2 controls the current injection module 3 through a current control module 4. Injection current is controlled. The first input terminal IN1 of the signal filter module 2 is connected to the non-inverting input terminal of the first operational amplifier A1 through the first resistor R1 and the first capacitor C1 connected in series, and the second capacitor is connected between the first resistor R1 and the first capacitor C1 C2 is grounded, the non-inverting input terminal of the first operational amplifier A1 is grounded through the second resistor R4, the inverting input terminal of the first operational amplifier A1 is grounded through the third resistor R3 and the fourth resistor R4 connected in s...

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Abstract

The invention discloses a video frame preprocessing chip, comprising a preprocessing module, the input end of the preprocessing module is connected in parallel with a signal filtering module and a current injection module, and the signal filtering module controls the injection current of the current injection module through the current control module Take control. The invention can improve the deficiencies of the prior art, strengthen the video signal through the hardware circuit, and reduce the interference of the hardware circuit to the video signal at the same time.

Description

technical field [0001] The invention relates to the technical field of chip circuits, in particular to a video frame preprocessing chip. Background technique [0002] Video frame preprocessing chip is a widely used video processing device. In order to ensure the processing effect, a filter circuit is usually provided in the front-end circuit of the chip. However, the filter circuit will reduce the signal strength, so that some parts with lower strength in the video signal cannot be effectively preprocessed by the video frame preprocessing chip. In order to avoid additional interference caused by hardware circuits, the existing solution is usually to enhance the video signal through software during the preprocessing process. operation, resulting in a reduction in the processing efficiency of video frames. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a video frame preprocessing chip, which can solve the defic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/21
CPCH04N5/21
Inventor 邓荣春罗中华梁玉英冯都康张晓宇张超
Owner 南昌理工学院
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