US 6,073,489 · Granted 2000-06-13
The Virtual Opponent Patent That Invented Sports Performance Tracking
Imagine a basketball or football drill where a computer-generated opponent moves and reacts to exactly what you do in real time, using cameras to track every tiny shift in your body position. This patent covers the tech that makes that kind of interactive, responsive virtual training partner possible—no lag, no cheating, totally responsive to your moves.
The plain-English version
What it protects
The claim covers a system that uses optical sensors to detect a player's position and movement in three or more directions in near-real-time, combined with computer-controlled virtual opponents that respond interactively to those movements. What's protected here is the specific combination of live positional tracking and responsive virtual sport-specific cuing—especially opponents that adapt and react to the player's actions without noticeable visual delay, creating short, discrete movement challenges with no fixed start or end points.
Why it matters
This patent was foundational for interactive sports training and performance assessment technology. By combining real-time motion tracking with responsive virtual opponents, it created a way to quantify athletic abilities that couldn't be measured before—things like reaction time, decision-making under pressure, and the ability to handle dynamic, unpredictable movement. It opened the door to computer-based coaching and training systems that could adapt to each player's performance on the fly.
Real-world use
When you step into a modern athletic training facility with motion-capture technology that creates an interactive virtual defender or opponent that responds to your footwork and positioning, you're experiencing the core concept from this patent.
Original USPTO abstract
A system for assessing a user's movement capabilities creates an accurate simulation of sport to quantify and train several novel performance constructs by employing: proprietary optical sensing electronics for determining, in essentially real time, the player's positional changes in three or more degrees of freedom; and computer controlled sport specific cuing that evokes or prompts sport specific responses from the player. In certain protocols of the present invention, the sport specific cuing may be characterized as a "virtual opponent", that may be kinematically and anthropomorphically correct in form and action. Though the virtual opponent could assume many forms, the virtual opponent is responsive to, and interactive with, the player in real time without any perceived visual lag. The virtual opponent continually delivers and/or responds to stimuli to create realistic movement challenges for the player. The movement challenges are typically comprised of relatively short, discrete movement legs, sometimes amounting to only a few inches of displacement of the player's center of mass. Such movement legs are without fixed start and end positions, necessitating continual tracking of the player's position for meaningful assessment. The virtual opponent can assume the role of either an offensive or defensive player.
Patent details
- Publication number
- US 6,073,489
- Filing date
- 1998-03-03
- Grant date
- 2000-06-13
- Assignee
- French; Barry J. / Ferguson; Kevin R.
- Inventor(s)
- FRENCH; BARRY J., FERGUSON; KEVIN R.
- CPC class
- A63B24/0021
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