Distributed transmission device for video stream signal processing system

Abstract

The invention discloses a distributed transmission device for a video stream signal processing system. The distributed transmission device is applied to the embedded video signal processing system which comprises multiple video processing units, an AXI bus, an ARM processor, a DDR memory, distributed DMA controllers and corresponding DMA configuration units. Each distributed DMA controller is connected with one video processing unit so that the video processing unit connected with each distributed DMA controller can have access to the DDR memory. Two-dimensional video data can be transmitted between the processing units and the DDR memory, and the adopted distributed design method enables DMA control to have the advantages that the speed, flexibility, system expansibility and reliability are high. The distributed transmission device is applied to the video processing system for high-speed movement cable appearance defect online detection, the speed of access of the video processing units to an off-chip DDR can be greatly increased, and therefore the performance of the whole system is improved.

Description

technical field [0001] The invention relates to the field of data transmission, and more specifically, the invention relates to a distributed DMA transmission device used in a video stream signal processing system. technical background [0002] During the production process of the wire rod, due to various factors such as raw material selection and processing technology, defects such as pores, scratches, and pitting will inevitably appear on the surface of the wire rod, and these defects will affect the performance of the final product. Therefore, it is necessary to detect the apparent defects of the wire rod during the production process. Machine vision inspection technology is a high-tech technology that uses cameras to obtain images of objects to be inspected, and realizes inspection through image processing technology. It has the advantages of non-contact, fast speed, high precision, and intelligence. The machine vision technology is introduced into the detection of appa...

AI Technical Summary

Problems solved by technology

[0008] (1) The flexibility of the system is poor, and there are certain differences in the way different peripherals transmit data. Different transmission modes need to be adopted, and the centralized DMA control mode is used, which is difficult to meet this requirement.

[0009] (2) The scalability of the system is poor. When new peripherals need to be added to the system, the centralized DMA control method needs to be re-modified to the DMA controller, adding corresponding channels and arbitration, which is very ineffective in practical applications. convenient

[0010] (3) Low reliability. When a transmission failure occurs in a certain peripheral, the centralized DMA controller will be affected, which may cause it to fail to work normally, resulting in the failure of other peripherals to transmit data normally through DMA, and the entire transmission system will collapse.

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