US5408274A
Expired / Lapsed
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Method and apparatus for compositing compressed video data
Assignee: University of California
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Filing: 1993-03-11
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Granted: 1995-04-18
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Expires: 2013-03-11
Abstract
Abstract Inverse motion compensating devices are used to transform motion compensated transform domain video signals to corresponding transform domain video signals. A compositing mechanism receives the transform domain video signals from the inverse motion compensating devices and performs transform domain video compositing operations directly on the transform domain video signals. The compositing operations result in a single composited signal incorporating each of the transform domain video signals. The single composited signal may be encoded for motion compensation to generate a single motion compensated transform domain video signal suitable for transmission. After transmission, inverse transform domain operations and inverse motion compensation operations may be performed to reconstruct the composited signal. The composited signal may then be projected on a video display device.
Inventors
- 👤 Shih-Fu Chang
- 👤 David Messerschmitt
- 👤 Wen-Lung Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:48
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/222; H04N5/262; H04N19/00; H04N19/40; H04N19/48; H04N19/60; H04N19/61; H04N19/90; H04N21/00; H04N21/20; H04N21/23; H04N21/236; H04N21/2365; H04N21/40; H04N21/43; H04N21/434; H04N21/4347
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
109 words
An apparatus for processing a first motion compensated transform domain video signal and a second motion compensated transform domain video signal, said apparatus comprising: an inverse motion compensating device performing inverse motion compensation on said first motion compensated transform domain video signal and said second motion compensated transform domain video signal to obtain a first transform domain video signal and a second transform domain video signal; and a compositing mechanism coupled to said inverse motion compensating device, said compositing mechanism performing transform domain video compositing operations on said first transform domain video signal and on said second transform domain video signal to obtain a transform domain composited video signal.
Claim 2
Independent Claim
109 words
An apparatus for processing a first motion compensated transform domain video signal and a second motion compensated transform domain video signal, said apparatus comprising: an inverse motion compensating device performing inverse motion compensation on said first motion compensated transform domain video signal and said second motion compensated transform domain video signal to obtain a first transform domain video signal and a second transform domain video signal; and a compositing mechanism coupled to said inverse motion compensating device, said compositing mechanism performing transform domain video compositing operations on said first transform domain video signal and on said second transform domain video signal to obtain a transform domain composited video signal.
Claim 3
Dependent Claim
35 words
The apparatus of claim 1 wherein said inverse motion compensating device includes a reference block calculator for generating an inverse motion compensated transform domain signal corresponding to said first motion compensated transform domain video signal.
Claim 4
Dependent Claim
55 words
The apparatus of claim 2 further comprising: a transform domain object translator for calculating non-grid aligned reference blocks within a grid of a first video frame of said first transform domain video signal to obtain a grid aligned current block in a grid of a second video frame of said first transform domain video signal.
Claim 5
Dependent Claim
27 words
The apparatus of claim 1 further comprising: a motion compensator for transforming said transform domain composited video signal to a motion compensated transform domain composited video signal.
Claim 6
Dependent Claim
34 words
The apparatus of claim 1 wherein said compositing mechanism includes: a compositing unit object translator for matching a grid aligned block of a first video frame with a block of a second video frame.
Claim 7
Dependent Claim
44 words
The apparatus of claim 1 wherein said compositing mechanism includes: an overlap execution unit for positioning a first video object from a frame of-said first transform domain video signal over a second video object from a frame of said second transform domain video signal.
Claim 8
Dependent Claim
41 words
The apparatus of claim 1 wherein said compositing mechanism includes: a pixel-wise multiplier to execute pixel multiplication between pixels within a frame of said first transform domain video signal and pixels within a frame of said second transform domain video signal.
Claim 9
Dependent Claim
31 words
The apparatus of claim 1 wherein said compositing mechanism includes: a filter for performing filtering operations on said first transform domain video signal and on said second transform domain video signal.
Claim 10
Dependent Claim
27 words
The apparatus of claim 1 wherein said compositing mechanism includes: a scaling unit for adjusting the size of image objects in said transform domain composited video signal.
Claim 11
Independent Claim
145 words
A method of processing a first video signal and a second video signal to form a single composited video signal, said method comprising the steps of: encoding said first video signal at a first location to form a first motion compensated transform domain video signal; encoding said second video signal at a second location to form a second motion compensated transform domain video signal; transmitting said first motion compensated transform domain video signal to a third location; transmitting said second motion compensated transform domain video signal to said third location; executing an inverse motion compensating operation at said third location to obtain a first transform domain video signal and a second transform domain video signal; and performing transform domain video compositing operations on said first transform domain video signal and on said second transform domain video signal to obtain a transform domain composited video signal.
Claim 12
Independent Claim
145 words
A method of processing a first video signal and a second video signal to form a single composited video signal, said method comprising the steps of: encoding said first video signal at a first location to form a first motion compensated transform domain video signal; encoding said second video signal at a second location to form a second motion compensated transform domain video signal; transmitting said first motion compensated transform domain video signal to a third location; transmitting said second motion compensated transform domain video signal to said third location; executing an inverse motion compensating operation at said third location to obtain a first transform domain video signal and a second transform domain video signal; and performing transform domain video compositing operations on said first transform domain video signal and on said second transform domain video signal to obtain a transform domain composited video signal.
Claim 13
Dependent Claim
41 words
The method of claim 10 further comprising the step of: encoding said transform domain composited video signal to form a motion compensated transform domain composed video signal; and transmitting said motion compensated transform domain composited video signal to a fourth location.
Claim 14
Dependent Claim
45 words
The method of claim 11 further comprising the step of effecting an inverse transform domain operation and an inverse motion compensation operation on said motion compensated transform domain composited video signal to yield a reconstructed composited video signal; and displaying said reconstructed composited video signal.
Claim 15
Independent Claim
163 words
An apparatus for processing a first motion compensated transform domain video signal and a second motion compensated transform domain video signal, said apparatus comprising: an inverse motion compensating device performing inverse motion compensation on said first motion compensated transform domain video signal and said second motion compensated transform domain video signal to obtain a first transform domain video signal and a second transform domain video signal, said inverse motion compensating device including a transform domain object translator for calculating non-grid aligned reference blocks within a grid of a first video frame of said first transform domain video signal to render a grid aligned current block in a grid of a second video frame of said first transform domain video signal; and a compositing mechanism coupled to said inverse motion compensating device, said compositing mechanism performing transform domain video compositing operations on said first transform domain video signal and on said second transform domain video signal to obtain a transform domain composited video signal.
Claim 16
Independent Claim
163 words
An apparatus for processing a first motion compensated transform domain video signal and a second motion compensated transform domain video signal, said apparatus comprising: an inverse motion compensating device performing inverse motion compensation on said first motion compensated transform domain video signal and said second motion compensated transform domain video signal to obtain a first transform domain video signal and a second transform domain video signal, said inverse motion compensating device including a transform domain object translator for calculating non-grid aligned reference blocks within a grid of a first video frame of said first transform domain video signal to render a grid aligned current block in a grid of a second video frame of said first transform domain video signal; and a compositing mechanism coupled to said inverse motion compensating device, said compositing mechanism performing transform domain video compositing operations on said first transform domain video signal and on said second transform domain video signal to obtain a transform domain composited video signal.
Claim 17
Dependent Claim
39 words
The apparatus of claim 13 wherein said first motion compensated transform domain video signal is a first Motion Compensated/Discrete Cosine Transform (MC/DCT) video signal and said second motion compensated transform domain video signal is a second MC/DCT video signal.
Claim 18
Dependent Claim
37 words
The apparatus of claim 14 wherein said transform domain object translator generates DCT coefficients for said non-grid aligned reference blocks based upon DCT coefficients of corresponding adjacent grid-aligned blocks encompassing each of said non-grid aligned reference blocks.
Claim 19
Dependent Claim
27 words
The apparatus of claim 13 further comprising: a motion compensator for transforming said transform domain composited video signal to a motion compensated transform domain composited video signal.
Claim 20
Dependent Claim
58 words
The apparatus of claim 16 wherein said motion compensator includes a transform domain object translator for calculating non-grid aligned reference blocks within a grid of a first video frame of said first transform domain video signal to obtain a grid aligned current block in a grid of a second video frame of said first transform domain video signal.
Claim 21
Dependent Claim
34 words
The apparatus of claim 13 wherein said compositing mechanism includes: a compositing unit object translator for matching a grid aligned block of a first video frame with a block of a second video frame.
Claim 22
Dependent Claim
45 words
The apparatus of claim 13 wherein said compositing mechanism includes: an overlap execution unit for positioning a first video object from a frame of said first transform domain video signal over a second video object from a frame of said second transform domain video signal.
Claim 23
Dependent Claim
41 words
The apparatus of claim 13 wherein said compositing mechanism includes: a pixel-wise multiplier to execute pixel multiplication between pixels within a frame of said first transform domain video signal and pixels within a frame of said second transform domain video signal.
Claim 24
Dependent Claim
31 words
The apparatus of claim 13 wherein said compositing mechanism includes: a filter for performing filtering operations on said first transform domain video signal and on said second transform domain video signal.
Claim 25
Dependent Claim
27 words
The apparatus of claim 13 wherein said compositing mechanism includes: a scaling unit for adjusting the size of image objects in said transform domain composited video signal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-17 | 1998-10-17 | 1999-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-17 | 2002-10-17 | 2003-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-17 | 2006-10-17 | 2007-04-18 | $7700.00 | Window Closed / Lapsed |