Patent ID: 6961094
Filing Date: 2005-11-01
Classification: H04N

Abstract:
1. An image-signal processing apparatus for generating a still-image signal in any one frame from a video signal including either an interlaced image signal having first and second fields of an image in which adjacent fields have different time axes or a progressive image signal having first and second fields obtained by alternately extracting every other horizontal scanning line from images having different time axes in alternate frames, said apparatus comprising: identification means for identifying the interlaced image signal or the progressive image signal included in the video signal; first and second image memories for storing two consecutive fields of images included in the video signal; a motion detection filter for detecting motion by comparing the images stored in the first and second image memories; an image interpolation filter for, when motion is detected by the motion detection filter in a first set of images stored in the first and second image memories, modifying the first set of images with a second set of images stored in the first and second image memories; bypass means for bypassing the image interpolation filter to extract the first set and the second set of images stored in the first and second image memories; and signal output means for alternately extracting, in fields, the first set and the second set of images sent from the image interpolation filter when the identification means either identifies the interlaced image signal or cannot identify the interlaced image signal, and for alternately extracting, in fields, the first set and the second set of images sent from the bypass means when the identification means identifies the progressive image signal.