Electronic white board system and method based on host process

Abstract

The invention relates to a method for processing a low cost electronic white board based on a mainframe and a system thereof. In a 'soft receiver', the prior positioning calculation finished at receiver hardware is moved to a computer / mainframe connected with the receiver and realized by software. The soft receiver just sends two paths of ultrasonic signals and one path of infrared signal to the mainframe by the format of certain data stream synchronously, thus the receiver is just a simple data collecting device and does not have any calculating capacity. A signal processor which takes the cost of a large piece of hardware in a hard receiver is not required, so the hardware cost of the whole receiver is reduced greatly, and the receiver is a real 'thin' receiver.

Description

technical field [0001] The present invention relates to an electronic whiteboard system based on the principle of ultrasonic positioning, and in particular to the realization architecture / structure and software and hardware implementation method of the electronic whiteboard system based on ultrasonic positioning. Background technique [0002] The basic composition of the electronic whiteboard system (including copy electronic whiteboard and interactive electronic whiteboard) based on the principle of ultrasonic positioning (see attached figure 1 with 2 shown): Ultrasonic and infrared signal transmitting pen, ultrasonic and infrared signal receiver, computer where electronic whiteboard software is located, connection line between receiver and computer, and whiteboard. Wherein the receiver (ultrasonic and infrared signal receiver) includes two ultrasonic and infrared sensing heads / ranging modules, and a positioning module; although the attached figure 1 The two ultrasonic an...

AI Technical Summary

Problems solved by technology

[0004] 1. The DSP processor specially used for ranging and positioning calculations greatly increases the hardware cost of the entire receiver;

[0005] 2. The limited hardware resources (computing power and storage unit) on the receiver limit the implementation complexity of the algorithm

[0006] 3. Because the ultrasonic positioning algorithm is solidified in the hardware circuit of the receiver, in order to improve the positioning accuracy of the system, it is very difficult to upgrade or update the algorithm on the hardware

However, the common feature of these new algorithms is that the computational complexity is increasing, and the amount of calculation and storage space required are also increasing.

The "hard receiver" system architecture hinders the application of advanced positioning algorithms in electronic whiteboard systems

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