Image transmission method and device based on PCIe protocol, and storage medium

Abstract

The invention discloses an image transmission method and device based on a PCIe protocol, and a storage medium. The method comprises the following steps: obtaining a target base address of a target channel according to a channel code corresponding to a target acquisition card, wherein the channel code is an identifier of the target channel in a display control device; generating an offset address of the target channel according to the channel code, the frame header of the target image and the row header information of the target image; and generating a destination address according to the destination address and the offset address, wherein the destination address is a cache address of the target display card. According to the method, the target image is transmitted to the target display card through the target address, so the channel number (master control unified number), frame start and row start information of the to-be-transmitted target image are filled in PCIe target address offset during image transmission based on the PCIe protocol, the PCIe address space utilization is maximized, and the problem that in the prior art, the number of service cards supported by a single display control device is limited is solved.

Description

Technical field [0001] The present invention relates to the field of image transmission, and in particular, there is an image transmission method and device, a storage medium based on a PCIe protocol. Background technique [0002] With embedded hardware splicing technology, multi-screen image processing technology, small-range LED technology, the development of television curtain wall related technology, image display control equipment, video matrix, etc., as a central controller of the splicing curtain wall, with its own computer The analog / digital signal, a composite video signal, a color difference signal, and the like are displayed on a large screen, and the function of the signal switching, superposition, and combination is achieved. [0003] Image display control equipment generally uses a card type chassis structure with a master card, input card, and output card. Input Output Sterplification Multi-FPGA (field programmable gate array) scheme is implemented, the user can ...

AI Technical Summary

Problems solved by technology

When the number of business cards is large, in a 32-bit host system, the maximum address space size of 4GB results in a limited number of business cards supported by a single display and control device

[0006] For the above problems, no effective solution has been proposed

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