Patent ID: 8319892

Claim:
A video signal processing apparatus, comprising: an input unit configured to input video frames; resolution converter units, each of which is configured to have a resolution converting characteristic for increasing pixels in one of the video frames to produce a converted frame; and a mixer unit configured to mix converted frames from the resolution converter units to obtain an output video frame, wherein: one of the resolution converter units is configured to perform a first resolution conversion on one of the input video frames to increase the pixels in a first direction for the one of the input video frames, and another of the resolution converter units is configured to perform a second resolution conversion on another of the input video frames to increase the pixels in a second direction which is different from the first direction for the another of the input video frames; wherein each of the resolution converter units increases the pixels of the video frames by π/2 in the first and second directions, shifts phases of the video frames, and adds the video frames after the shift and the video frames before the shift to produce converted video frames.