Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1990-02-20
1991-09-17
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358105, 358135, H04N 7137
Patent
active
050499912
ABSTRACT:
A movement compensation predictive coding method including: a first step of detecting a movement vector MV.sub.M between the N-th frame (N.gtoreq.0) and the (N+M)-th frame (M.gtoreq.2), the vector MV.sub.M being assumed as an initial value of a difference movement vector MVe, and to detect a movement vector MVi between the (N+1)-th frame (i=0, 1, 2, . . . , M-1) and (N+i+1)-th frame; a second step wherein a detected movement vector MVi exists in the vicinity of a predictive movement vector MVe/(M-i) predicted from the difference movement vector, the predictive vector MVe/(M-i) is assumed as a correct movement vector, and a movement compensation predictive coding is carried out from pixels predicted by using pixels in the vicinity of the coordinate indicated by the predictive vector MVe/(M-i), and obtaining a first subsegment difference movement vector, by subtracting the predictive vector MVe/(M-i) from the difference vector MVe; and a third step wherein when no detected movement vector MVi exists in the vicinity of a predictive movement vector MVe/(M-i), the detected vector MVi is assumed as a movement vector, and a movement compensation predictive coding is carried out using the vector MVi, and obtaining a second subsegment movement vector by subtracting the movement vector from the difference vector MVe.
REFERENCES:
patent: 4383272 (1983-05-01), Netravali
patent: 4485402 (1984-11-01), Searby
patent: 4862264 (1989-08-01), Wells
patent: 4985766 (1991-01-01), Morrison
patent: 4985768 (1991-01-01), Sugiyama
"Motion-Compensated Interframe Coding . . . ", Koga et al., Nippon Electric Co., Shingaku Giho References for Picture Technology, IE 81-54.
"Adaptive Predition of Motion Compensation . . . ", Koga et al., NEC Corp., Television Scientific Society Bulletin, vol. 39, No. 10, pp. 963-771 (1985).
Britton Howard W.
Meller Michael N.
Victor Company of Japan Ltd.
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