Patent ID: 7253821
Filing Date: 2007-08-07
Classification: G09G,H04N

Abstract:
1. A special effect device in which picture signals are read out from a frame buffer based on an address signal to impart a desired special effect to the picture signals read out from said frame buffer, said special effect device comprising: address signal generating means for generating readout address signals of said picture signals stored in said frame buffer so that a special effect will be produced in which a picture corresponding to the picture signals stored in said frame buffer is fractionated into plural partial pictures, having a wavy boundary line, defined by a preset function F, at the time of display, said partial pictures being translated so as to disappear to outside the display area, wherein said preset function F is defined as: wherein said address signal generating means generates, for a case in which, with the amount of movement trans, said preset function F, the maximum amplitude of the waveform produced by said function F fixAmplitude, the frequency fixFrequency and with the phase fixPhase, the center of a picture corresponding to the picture signals stored in said frame buffer is at the point of origin of a rectangular coordinate system, the readout address signal (X which satisfies the equations (4-4) and (4-5): where said address signal generating means further comprising means for generating the readout address signal (X said address signal generating means further generating the readout address signal (X, Y), for a case where the position of the point of origin in the rectangular coordinate system of a picture corresponding to picture signals stored in said frame buffer, by the equation (4-7): where, in the equation (4-5), Max denotes generation of a readout address signal for reading out a signal other than said picture signals stored in said frame buffer.