Frame-to-frame coding of television pictures using two-dimensional Fourier transforms (Corresp.)

Two systems are described for reducing the data rate required to transmit TV signals. Basic to the operation of both systems is the fact that if there is an object in the scene moving more or less in linear translation, then the two-dimensional frame-difference signal computed during the present frame will be very similar to the frame-difference signal which was computed during the previous frame except for a linear translation. Thus the Fourier transform of the frame-difference signal will also be similar during successive frames except for a linear phase shift.