Patent ID: 6720974
Filing Date: 2004-04-13
Classification: G06T,H04M,Y02D

Abstract:
An arithmetic unit for linearly interpolating a parameter of a pixel to be used to plot an arbitrary object in a three-dimensional video based on coordinate values of a vertex of a polygon and gradient values of the parameters in an X direction and a Y direction, comprising:arithmetic operation means for linearly interpolating a parameter of a pixel in a polygon based on coordinate values of a vertex of the polygon, a gradient value of the parameter in an X direction and a gradient value of the parameter in a Y direction; clock supply means for supplying a clock signal to said arithmetic operation means; detection means for detecting a particular gradient value of the parameter in the X direction or/and the Y direction to produce a parameter gradient value detection signal; and control means for receiving the parameter gradient value detection signal from said detection means and controlling said clock supply means in response to the parameter gradient value detection signal.