In this paper, we propose an efficient real-time multi-user input processing algorithm and protocol for supporting a number of different types of user input from various input devices. The main objective of this multi-user input processing algorithm and protocol is to support multiple users to interact simultaneously with the interactive digital content using a variety of user input devices. This protocol is composed of two parts: the input terminal and the server. The input terminals are connected to input devices and the 1:1 value obtained by the selection, calibration, integration, analysis and then transmission to the server to be used for the user input to the contents. The server processes multi-user input information and applies the input processing algorithm to identify the user and then pass input information to the desired application. This paper presents the design and implementation of the multi-user input processing algorithm and protocol. It also describes how to build and execute a multi-user interactive Unity3D application based on this algorithm.

A scalable large high-resolution tiled display supports a number of users from any point and distance to view and use contents on the display. However, user interaction with the tiled display is not well supported by traditional mouse and keyboard due to the screen size and resolution. While many user interaction techniques for tiled displays have been investigated, no single user interface standard is existed yet. In this paper, we describe a design and implementation of the multiple input device user interaction system for a scalable distributed tiled display system. This interaction system presents the generalization and interaction mechanism of input information to handle various input devices to enable users to simultaneously interact with tiled display applications. This system aims at supporting more complex user interactions via several different types of input devices.