Patent ID: 6593955
Filing Date: 2003-07-15
Classification: H04N

Abstract:
A method of processing video input data originating from a camera in a videophone system so as to reduce the amount of data transmitted during a video teleconference, the method comprising acts of:receiving a plurality of frames of video input data, wherein each received frame includes data depicting a user of a videophone system and fixed background data common to each received frame; substituting monotonous data for at least a portion of the fixed background data of each received frame, which simplifies data compression for each received frame because data compression need not account for any variations in the monotonous data; calculating the geometric center of the user's head within each received frame, wherein each calculation is based on a face detection algorithm; and defining a sliding viewport substantially centered about the calculated geometric center of the user's head to reduce the need to process data representing movement of the user from one received frame to another.