Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1991-04-30
1992-09-29
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358105, 358135, H04N 712
Patent
active
051517841
ABSTRACT:
The invention relates to developing a signal to represent each block of an image contained in a frame being interpolated in a motion interpolated system such that the error between the frame being interpolated and the reference frames is minimized without placing any predetermined limitation on the values of either the weights or the displacements employed as motion vectors. The weights and displacements required to achieve the minimization of the interpolation error are jointly determined on a block by block basis. A set of groups having a candidate displacement from each reference frame and, in accordance with an aspect of the invention, their corresponding best weights are determined. An error signal which would result if each member of the set of groups of candidate displacements from each reference frame and their corresponding best weights were employed to represent the block is evaluated. The group having the lowest error signal is either selected to represent the block or as a starting point for the selection of a new set of groups. By employing other aspects of the invention, the number of groups which need be evaluated to represent the block can be reduced from a predetermined maximum number.
REFERENCES:
patent: 4667233 (1987-05-01), Furukawa
patent: 4958226 (1990-09-01), Haskell et al.
patent: 4985768 (1991-01-01), Sugiyama
Michael Orchard, "A Comparison of Techniques for Estimating Block Motion in Image Sequence Coding", SPIE, vol. 1199, Visual Communications and Image Processing IV (1989).
Ciro Cafforio, Fabio Rocca and Stefano Tubaro, "Motion Compensated Image Interpolation", IEEE Transactions on Communications, vol. 38, No. 2, Feb., 1990.
Mohammad Reza Haghiri and Frederic Fonsalas, "Motion Compensated Interpolation Applied to HD-MAC Pictures Encoding and Decoding", Signal Processing of HDTV, Elsevier Science Publishers B.V. (North-Holland), 1988.
Lavagetto Fabio
Leonardi Riccardo
AT&T Bell Laboratories
Burgess Glenton B.
Groody James J.
Rosenthal E. J.
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