Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1991-11-08
1992-12-22
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 13, 358105, 358135, H04N 7133, H04N 7137, H04N 1104
Patent
active
051737736
ABSTRACT:
A progressive coding system wherein a moving picture signal is separated into a low frequency component of a little luminance variation and a high frequency component of much luminance variation, and the components are respectively coded by motion compensated predictive coding. The high frequency component is motion-compensated according to a motion quantity of the low frequency component. The motion quantity is modified by a sampling ratio of the moving picture signal and low frequency component. The motion quantity can be detected based on the low frequency component in a present frame and those subjected to intraframe coding in previous and subsequent intraframes to the present frame. A predictve low frequency component is then obtained by motion compensation using the motion quantity according to time intervals of the low frequency components between the frames. A predictive high frequency component is also obtained like the predictive low frequency component referring to the time interval. A motion quantity of the moving picture signal is obtained for motion-compensating the low and high frequency components.
REFERENCES:
patent: 4733297 (1988-03-01), Katsumata
patent: 4891699 (1990-01-01), Hamada
patent: 5028995 (1991-07-01), Izawa
Moving Vector Detecting Circuit Sep. 06, 1990 Takami Niihara, abstract JP-2-224490 (A).
Adaptive Inter-Frame Prediction Encoding System Apr. 27, 1989 Kenji Sugiyama, abstract JP-2-285816 (A).
Picture Encoder Jul. 04, 1988 Hisashi Ibaraki, abstract JP-2-16887 (A).
Inter-Frame Predictive Coding System Jan. 20, 1989 Kenji Sugiyama, abstract JP-2-192378 (A).
Niihara Takami
Ueda Motoharu
Britton Howard W.
Victor Company of Japan Ltd.
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