Patent ID: 8233730

Claim:
A system for identifying motion between a previous frame and a current frame, the system comprising: a fast Fourier transform calculator configured to generate corresponding low pass frequency domain representations of previous frame data and current frame data and corresponding high pass frequency domain representations of the previous frame data and the current frame data; a phase difference calculator configured to calculate a first phase difference between the previous frame data low pass frequency domain representation and the current frame data low pass frequency domain representation, the phase difference calculator further configured to calculate a second phase difference between the previous frame data high pass frequency domain representation and the current frame data high pass frequency domain representation; an inverse Fourier transform calculator configured to generate a first inverse Fourier result based on the first phase difference and a second inverse Fourier result based on the second phase difference; and a motion vector calculator configured to generate two motion vectors based on the first inverse Fourier result and the second inverse Fourier result; wherein the generated two motion vectors are used to generate a display on a display device.