Richard J. Qian

Detecting semantic events in soccer games: towards a complete solution

This paper presents a new method for detecting semantic events which may happen in a soccer game. Our method requires the position information of the players and ball as input, which can be provided by a tracking system from processing either microwave signals or video sequences. Based on the tracking data, the method detects a wide range of player actions and game events using a set of heuristic rules which are derived from a hierarchical entity-relationship model representing the prior knowledge of soccer events. We have applied the proposed method as a key enabling module in a realworld sports entertainment application and the experimental results are given in the paper.

Digital-item-based media management system and applications

This paper presents a new system architecture for managing multimedia content based on the digital item concept defined by MPEG-21. The focus is to provide a common interface such that: (1) media resources and metadata can be bound together and accessed seamlessly via a single platform-independent abstraction; (2) arbitrary, heterogeneous metadata formats can be used; and (3) content can be reliably exchanged and shared across different platforms. We demonstrate the effectiveness of such a system via two real-world applications: a media server product and a digital match management system for sports content.