Embedded type wireless projection access device

Abstract

The invention discloses an implementation method of an embedded type wireless projection access device based on OMAP (object module assembly program)3530 and provides a rational wireless expansion solution based on a screen transmission idea to solve the use inconvenience of the existing wired projector. The device adopts the OMAP 3530 of TI as a core, wherein a dual-core framework combining ARM and DSP (digital signal processor) meets the application requirement of user interaction and data processing. The implementation method provided by the invention employs different programming methods and ideas comprehesively, the whole application program is divided into four modules at an ARM end and a video decryption server end mould at a DSP end, thereby providing a guarantee for real time processing of streaming media data, wherein the four modules at the ARM end include a network reception module, a code stream conversion module, a video decryption client end module and a video rendering module.

Description

technical field [0001] The invention relates to an embedded wireless projection access device, which belongs to the technical field of embedded streaming media. Background technique [0002] A projector is a multimedia device that can visually display teaching content and enterprise products in the form of pictures and videos, and has been widely used in the fields of education and business. Especially in colleges and universities, projectors and their supporting multimedia teaching equipment are installed in almost every classroom. However, traditional wired projectors have the following disadvantages: [0003] 1. The projection equipment needs to be equipped with a special data communication line to connect with the fixed computer in the classroom, which is inconvenient to install; [0004] 2. If other computers need to be connected to it, you need to unplug the VGA cable to connect to the newly connected computer, which is inconvenient to use; [0005] 3. Smart mobile ...

AI Technical Summary

Problems solved by technology

[0003] 1. The projection equipment needs to be equipped with a special data communication line to connect with the fixed computer in the classroom, which is inconvenient to install;

[0004] 2. If other computers need to be connected to it, you need to unplug the VGA cable to connect to the newly connected computer, which is inconvenient to use;

[0005] 3. The use of smart mobile devices such as pads is becoming more and more common, and its flexible and convenient use makes it gradually widely used in teaching and other fields, but it does not have a traditional VGA interface and cannot be connected to a projector

[0020] (2) For PPT presentation documents, special small software is used to save them as multimedia files, PCs, mobile phones and other sending devices play multimedia files, and the projector uses a dedicated hardware decoding chip to decode and display, which is not universal. If the encoding used If there is a change in the method, it cannot be updated and supported;

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