US5173773A
Expired / Lapsed
US
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Moving picture signal progressive coding system
Assignee: Victor Company of Japan Ltd
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Filing: 1991-11-08
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Granted: 1992-12-22
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Expires: 2011-11-08
Abstract
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.
Inventors
- 👤 Motoharu Ueda
- 👤 Takami Niihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:35
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/12; H04N7/122; H04N19/00; H04N19/30; H04N19/50; H04N19/503; H04N19/51; H04N19/513; H04N19/53; H04N19/577; H04N19/59; H04N19/60; H04N19/61; H04N19/90; H04N21/00; H04N21/20; H04N21/25; H04N21/266; H04N21/2662
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
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 system comprising: motion quantity modification means for modifying a motion quantity of the low frequency component according to a sampling ratio of the moving picture signal and low frequency component; and motion compensation means for motion-compensating the high frequency component according to the motion quantity thus modified.
Claim 2
Dependent Claim
89 words
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 system comprising: motion quantity modification means for modifying a motion quantity of the low frequency component according to a sampling ratio of the moving picture signal and low frequency component; and motion compensation means for motion-compensating the high frequency component according to the motion quantity thus modified.
Claim 3
Dependent Claim
286 words
A progressive coding system wherein a moving picture signal in a present frame is separated into a low frequency component or a little luminance variation in the present frame and a high frequency component of much luminance variation in the present frame, and the components are respectively coded by motion compensated predictive coding, the system comprising: motion detection means for respectively detecting motion quantities on the low frequency component in the present frame and low frequency components in previous and subsequent intraframes to the present frame; compensation means for respectively motion-compensating the low frequency components in the previous and subsequent intraframes according to the respective motion quantities to produce first and second pre-predictive low frequency components, weighting the pre-predictive low frequency components according to time intervals between the frames thereof to add the pre-predictive low frequency components thus weighted to each other, thus producing a third pre-predictive low frequency component, selecting one of the first, second and third pre-predictive low frequency components, of the least predictive error, as a predictive low frequency component for the motion compensated predictive coding and outputting a selection signal indicating which is selected among the first, second and third pre-predictive low frequency components; motion quantity modification means for respectively modifying the motion quantities according to a sampling ratio of the moving picture signal and low frequency component; and second motion compensation means responsive to the selection signal for producing a predictive high frequency component on the basis of the modified motion quantities and the high frequency component of either the previous or subsequent intraframe or both the intraframes in a manner identical to that in which the selected one of the first, second and third pre-predictive low frequency components is produced.
Claim 4
Dependent Claim
286 words
A progressive coding system wherein a moving picture signal in a present frame is separated into a low frequency component or a little luminance variation in the present frame and a high frequency component of much luminance variation in the present frame, and the components are respectively coded by motion compensated predictive coding, the system comprising: motion detection means for respectively detecting motion quantities on the low frequency component in the present frame and low frequency components in previous and subsequent intraframes to the present frame; compensation means for respectively motion-compensating the low frequency components in the previous and subsequent intraframes according to the respective motion quantities to produce first and second pre-predictive low frequency components, weighting the pre-predictive low frequency components according to time intervals between the frames thereof to add the pre-predictive low frequency components thus weighted to each other, thus producing a third pre-predictive low frequency component, selecting one of the first, second and third pre-predictive low frequency components, of the least predictive error, as a predictive low frequency component for the motion compensated predictive coding and outputting a selection signal indicating which is selected among the first, second and third pre-predictive low frequency components; motion quantity modification means for respectively modifying the motion quantities according to a sampling ratio of the moving picture signal and low frequency component; and second motion compensation means responsive to the selection signal for producing a predictive high frequency component on the basis of the modified motion quantities and the high frequency component of either the previous or subsequent intraframe or both the intraframes in a manner identical to that in which the selected one of the first, second and third pre-predictive low frequency components is produced.
Claim 5
Dependent Claim
107 words
A progressive coding system wherein a moving picture signal is divided 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 system comprising: motion quantity modification means for modifying a motion quantity of the moving picture signal according to a sampling ratio of the moving picture signal and low frequency component; first motion compensation means for motion-compensating the low frequency component according to the motion quantity thus modified; and second motion compensation means for motion-compensating the high frequency component according to the motion quantity thus modified.
Claim 6
Dependent Claim
107 words
A progressive coding system wherein a moving picture signal is divided 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 system comprising: motion quantity modification means for modifying a motion quantity of the moving picture signal according to a sampling ratio of the moving picture signal and low frequency component; first motion compensation means for motion-compensating the low frequency component according to the motion quantity thus modified; and second motion compensation means for motion-compensating the high frequency component according to the motion quantity thus modified.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-12-22 | 1996-06-22 | 1996-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-22 | 2000-06-22 | 2000-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-22 | 2004-06-22 | 2004-12-22 | $7700.00 | Window Closed / Lapsed |