Motion-vector detection apparatus for a video signal

Details Motion-vector detection apparatus for a video signal Motion-vector detection apparatus for a video signal

1994-09-27

1996-05-07

Chin, Tommy P.

Television

Image signal processing circuitry specific to television

Motion vector generation

348420, H04N 724

Patent

active

055151140

ABSTRACT:
A frame difference accumulator accumulates differences between the present frame and the previous frame of an input video signal in each block and outputs an accumulated value of each block. A motion detector detects a candidate motion vector and an evaluation function value of the candidate motion vector in each block. A region detector outputs a threshold selection control signal on the basis of the accumulated value. A threshold selector selects one of a low threshold and a high threshold as a selected threshold in each block. A comparing section compares a difference between the accumulated value and the evaluation function value with the selected threshold and outputs a vector selection control signal. A vector selector selects one of a zero vector and the candidate motion vector as a motion vector of each block.

REFERENCES:
patent: 4460923 (1984-07-01), Hirano et al.
patent: 4683494 (1987-07-01), Furukawa et al.
patent: 5046071 (1991-09-01), Tanoi
patent: 5063608 (1991-11-01), Siegel
patent: 5177608 (1993-01-01), Ohki et al.
patent: 5258836 (1993-11-01), Murata

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