An interactive karaoke system includes a microphone developing an audio input from at least one karaoke performer; a camera producing a series of video frames including the at least one karaoke performer; and a karaoke processor system including a video environment and a related audio environment for...http://www.google.com.au/patents/US6692259?utm_source=gb-gplus-sharePatent US6692259 - Method and apparatus for providing interactive karaoke entertainment
