Method and apparatus for processing picture signals having inter

Details Method and apparatus for processing picture signals having inter Method and apparatus for processing picture signals having inter

1988-11-02

1989-09-19

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358133, H04H 502, H04H 712

Patent

active

048686557

ABSTRACT:
With interlaced field scanned TV, a point (P) in a field at time (t+1) is determined on the basis of points situated in said field on the same vertical (C and D), and from points situated in the fields which are adjacent in time (t and t+2). The invention provides for multi-gradient motion detection, i.e. relating not only to the points on the same vertical (C and D), and to the points (A and B) having the same position as the point (P) but in the adjacent fields, but also on the basis of points (E, F, G, and H) which are vertically adjacent to the points (A and B) in the adjacent fields and occupying the same fields. Pairs of such points on either side of the point (P) can thus be defined. Interpolation is performed along each of the available pairs, and the interpolations are weighted as a function of the corresponding gradient. Hierachical partial interpolation is performed for each of the pairs taking account of whether the point (P) is in the presence of a horizontal outline, or a quasi-horizontal outline, or no such outline.

REFERENCES:
patent: 4322750 (1982-03-01), Lord et al.
patent: 4551753 (1985-11-01), Nishizawa et al.

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