led display control card

Abstract

The invention relates to an LED display screen control card which comprises a video signal input interface, an audio signal input interface, a video processor chip and a programmable logic device. The video processor chip is electrically connected with the video signal input interface and the audio signal input interface and used for processing input video signals and audio signals so as to output digital video data and digital audio data to the programmable logic device. In addition, the programmable logic device is used for processing the digital video data and the digital audio data so as to output the digital video data and the digital audio data. According to the LED display screen control card, the video processor chip is additionally arranged, and by means of the video and image processing function and the audio processing function of the video processor chip, the problems that a traditional transmission card is provided with a single input interface, the number of image processing functions is small, and audio transmission is not supported can be solved.

Description

technical field [0001] The invention relates to the technical field of display control, in particular to an LED display control card. Background technique [0002] In the existing LED display control system, the LED display is usually spliced ​​by multiple LED cabinets, and each LED cabinet is spliced ​​by multiple LED light panels. Each LED cabinet is also equipped with a receiving card, and the receiving card outputs image driving signals to the LED light board through the cable to drive the LED light board to display. Each LED display control system is equipped with a sending card. Based on a specific transmission protocol, the sending card sends the input video source to the receiving card in a fixed data format, and the receiving card completely displays the input video source on the LED display. superior. [0003] like figure 1 As shown, the traditional sending card 10 usually uses a decoder chip 11 such as TFP401 or ADV7612 to convert the DVI video source signal fr...

AI Technical Summary

Problems solved by technology

[0004] However, the traditional sending card has the following disadvantages: (1) The input interface is single: the sending card generally uses a single DVI interface to receive the DVI format video source image output from the computer or video processor and other front-end equipment to complete the data reception.

This requires that the front-end equipment must have a DVI interface, otherwise the sending and receiving of image data cannot be completed

At the same time, the image resolution it supports is single. If the image output bandwidth of the front-end equipment is not enough or the processing capacity is limited, it will cause the input image resolution not to match the back-end receiving card, resulting in low image quality or failure to work at all.

(2) Less image processing functions: general sending cards can only perform simple gamma (Gamma) and color temperature adjustments on input images, and cannot implement video enhancement processing functions such as color enhancement, deinterlacing, skin color compensation, etc., let alone Realize picture-in-picture (PIP), graphic overlay, multi-channel seamless switching and other video processing functions and high-performance image intelligent zooming, with a single function

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