On screen display (OSD) control display method and device based on advanced extensible interface (AXI) bus protocol

Abstract

The invention discloses an on screen display (OSD) control display method and a device based on an advanced extensible interface (AXI) bus protocol. After OSD data is selected through an OSD data channel, flexible modification and display on an OSD map layer can be achieved by utilizing of read-write cache first input, first output (FIFO) and an advanced extensible interface (AXI) bus arbitration module, wherein video memory is shared by the OSD data, and at the same time, a path of video interfaces is arranged on the exterior so as to achieve the picture-in-picture effect. A bilinearity Scaler zoom module is used for carrying out zoom process on an OSD image with random proportions, and at last an OSD and video overlap module is utilized to achieve abundant and diversified display modes of the OSD. According to the OSD control display method and the device based on an AXI bus protocol, the design of very large scale integration (VLSI) is achieved, intensive study is carried out on key points in the VLSI, and code compiling and the function of the code compiling of a Verilog-hardware description language (HDL) are achieved on the basis of the intensive study on the key points in the VLSI.

Description

technical field [0001] The invention belongs to the technical field of digital television, digital video image processing and display, relates to AXI bus control, OSD data storage, image scaling and video overlay, especially an OSD control and display method and device based on AXI bus protocol, so as to realize OSD and Various display methods of video images to achieve a more beautiful purpose. Background technique [0002] OSD (On Screen Display) is to display specified images, symbols or characters in a certain way in a specified area on the display screen. In recent years, with the application of digital video technology in many fields such as home appliances, monitoring systems, and handheld devices, various advanced algorithms have been applied to video processing chips to provide consumers with clearer and smoother images. OSD display technology has also has become an indispensable part. At the same time, in order to meet people's increasingly higher visual requirem...

AI Technical Summary

Problems solved by technology

[0003] The OSD display devices currently on the market are relatively independent, and different OSD chips need to be used for different OSD sources, which is not compatible enough; at the same time, an external OSD memory needs to be mounted, and the cost is high; currently, the dedicated OSD chip only uses a single transparency Threshold, the entire OSD image needs to be rewritten when modifying the OSD image, and a single horizontal or vertical scaling is used for OSD scaling, which is not flexible enough

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