Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1989-06-26
1990-06-26
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358105, H04N 502
Patent
active
049376675
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. Hierarchical 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: 3051778 (1962-08-01), Graham
patent: 4551753 (1985-11-01), Nishizawa et al.
French Search Report 1984 International Zurich Seminar on Digital Communications, Applns. of Source Coding Channel Coding and Secrecy Coding, 6-8 mars 1984, (continued) Zurich/Switzerland, SwissFederal Institute of Technology, IEEE; J. DeWitte et al.: "Optimization of Addressing Bit Rate in a Multimode Coder with Motion Compensation for Broadcast Television".
Choquet Bruno
Siohan Pierre
Coles Sr. Edward L.
ETAT Francais represente par le Ministre Delegue des Postes et
Kostak Victor R.
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