| 摘要 |
<p>The present invention combines a head-tracking system, for example a camera system typically used for user head and eye tracking, with a plurality of loudspeakers to as to enhance the audio experience of the user. The location of the user can be used to alter the audio signal sent to the plurality of loudspeakers to improve such functions as surround sound. In addition, the camera system can be used, when combined with an array of loudspeakers that can produce tight beams of sound, to direct different sound beams at different users, with virtually no crosstalk so as to allow users to experience different media from the same audio system, and which is tolerant of changed user positions. In addition, the camera system can aid setting up the array for real surround sound delivery, which bounces sound beams off wall. Cross-talk cancellation can additionally be used. The sound beams may represent 2- D or 3-D sound sources in real time. Sound beam parameters are adjusted to provide the listener with in impression of the 2-D or 3-D position and movement of sound-producing entities of audio-visual programme material in real-time. The beam parameters used include beam-direction, beam focal length, frequency response and gain. Such a Sound Projector producing a real-time representation of 3-D sound sources can be used alone or in conjunction with a video display, a television, a personal computer or a games console.</p> |
