Abstract: A digital video system (2) is disclosed, in which an analog input video signal is sampled at an optimum sample phase (Pnc), and converted to a digital datastream for display. A phase-locked loop (12) generates a plurality of sample clock phases. One of the sample clock phases (Pnc) is applied to an analog-to-digital converter (10), which digitizes the analog input video signal accordingly. Phase alignment circuitry (20) is provided that includes three sample-and-hold circuits (22b, 22c, 22a) that sample the analog input video signal, in parallel with the analog-to-digital converter (10), at times before, at, and after the current sample clock phase used by the analog-to-digital converter (10). The earlier and later sampled voltages are compared against the current sampled voltages to generate difference voltages that are each compared against a threshold voltage (Vthr).

Abstract: A video image display device is provided. The device includes an expansion factor deriving unit deriving and outputting an expansion factor for each frame of the video image data, for use in a luminance range expansion process for expanding a luminance range of the video image data on the basis of an image characterizing quantity related to the luminance of the video image data corresponding to the frame; a luminance range expansion processing unit performing the luminance range expansion process to the video image data on the basis of the expansion factor output from the expansion factor deriving unit; and a scene-change detecting unit detecting a change in a screen state of a present frame into a black screen state on the basis of the video image data and detecting a scene-change indicating that the scene of the video image has changed.

Abstract: An edge direction vector determination, which can be used for video interlaced-to-progressive conversion by motion-adaptive interpolation, has a coarse edge vector determination over a large search window followed by a fine edge vector determination over a small window plus confidence level assessment for field interpolation.