Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1985-04-25
1987-05-26
Goldberg, E. A.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358105, H04N 712
Patent
active
046689869
ABSTRACT:
A motion-adaptive interpolation method for a motion video signal includes the steps of computing a representative motion vector of a moving object by using a certain number of motion vectors, and implementing a modification of the representative motion vector such that a variation of the representative motion vector at a present frame period with respect to the representative motion vector at a previous frame period is limited to a predetermined range, thus increasing the number of the frames per unit of time by using the modified representative motion vector. Further, a device for implementing the motion-adaptive interpolation includes motion estimation circuitry for evaluating an estimated motion of the motion video signal. The motion estimation circuitry has a function to compute the representative motion vector by using original motion vectors, a function to implement a modification of the representative motion vector so as to limit its variation of a present representative motion vector with respect to a previous one, and a function to create a motion vector for motion-adaptive interpolation. Thus, it is possible to provide an excellent smooth movement reproduction and high resolution in the moving area within the frame of the motion video signal.
REFERENCES:
patent: 4307420 (1981-12-01), Ninomiya et al.
patent: 4310853 (1982-01-01), Madson
patent: 4460923 (1984-07-01), Hirano et al.
ICC '84 May 14-17, 1984 Proceedings, vol. 2, (pp. 527-1010), "Motion-Adaptive Interpolation for Videoconference Pictures".
"Motion Compensated Prediction for Inter-Frame Coding Systems", Image Technical Study Section, Electrocommunication Society, May 1978, by Ninomiya.
Foster Patrick W.
Goldberg E. A.
NEC Corporation
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