Patent ID: 8932134
Filing Date: 2015-01-13
Classification: A63F,H04S

Abstract:
1. A method of audio processing in which a video camera is used to detect a position of a user relative to a position of the video camera, the video camera having an associated microphone located substantially at the position of the camera and the camera being placed in a position other than the user's listening position, the method comprising the steps of: calibrating, by one or more processors, the position of the video camera relative to a plurality of loudspeakers by (i) generating test signals for the plurality of loudspeakers; (ii) measuring acoustic signals from the plurality of loudspeakers with the microphone located substantially at the position of the camera; and (iii) adjusting output timing of sound data signals for reproduction by respective ones of the plurality of loudspeakers so that simultaneous source ones of the sound data signals are then timed to cause corresponding ones of the acoustic signals from the respective loudspeakers to reach the microphone substantially simultaneously so as to set a position where the acoustic signals from selected ones of the plurality of loudspeakers are coincident at a sweet spot to the position of the camera; detecting a position of the user relative to the camera from images captured by the camera, thereby estimating the position of the user relative to an estimated position of the sweet spot; and adjusting, by the one or more processors, the output timing of the sound data signals for reproduction by the respective loudspeakers in accordance with the estimated position of the user relative to the position of the camera so as to move the estimated position of the sweet spot to the estimated position of the user.