US5572258A
Expired / Lapsed
US
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Motion compensation estimating device and method achieving improved motion compensation
Assignee: NEC Corp
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Filing: 1994-09-20
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Granted: 1996-11-05
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Expires: 2014-09-20
Abstract
Abstract An area subdividing unit subdivides a reference image, producing sub-areas. An inter-frame difference calculating device determines inter-frame differences between the reference image and an input image. A moving area detecting unit designates, by reference to the inter-frame differences, moving areas from a plurality of sub-areas. An area integrating device integrates the detected moving areas according to information of the reference image to create a plurality of moving object areas. A motion estimating device estimates motion between the input and reference images for each moving object area to attain motion parameters. A motion compensating unit compensates motion for each moving object area based on the motion parameters to generate a motion compensated prediction image. A motion compensating apparatus is capable of achieving complete and exact motion compensation using area information and a reduced number of encoding operations.
Inventors
- 👤 Yutaka Yokoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:15
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/50; H04N19/503; H04N19/51; H04N19/20
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
154 words
A motion compensation apparatus for inter-frame prediction comprising: an area subdividing means for subdividing a reference image into sub-areas and producing a subdivided area, an inter-frame difference calculating means for producing inter-frame difference information between an input image and the reference image; a moving area detecting means for detecting, by reference to the inter-frame difference information, sub-areas in said subdivided area having inter-frame difference information of a predetermined character and designating said sub-areas as moving areas; an area integrating means for integrating the moving areas and outputting the integrated areas as moving object areas; motion estimating means for estimating inter-frame motion between the input and reference images for each of the moving object areas and outputting motion parameters representing motion of the moving object areas; and motion compensating means for conducting motion compensation for each of the moving object areas according to the motion parameters and producing and outputting a motion compensated prediction image.
Claim 2
Dependent Claim
154 words
A motion compensation apparatus for inter-frame prediction comprising: an area subdividing means for subdividing a reference image into sub-areas and producing a subdivided area, an inter-frame difference calculating means for producing inter-frame difference information between an input image and the reference image; a moving area detecting means for detecting, by reference to the inter-frame difference information, sub-areas in said subdivided area having inter-frame difference information of a predetermined character and designating said sub-areas as moving areas; an area integrating means for integrating the moving areas and outputting the integrated areas as moving object areas; motion estimating means for estimating inter-frame motion between the input and reference images for each of the moving object areas and outputting motion parameters representing motion of the moving object areas; and motion compensating means for conducting motion compensation for each of the moving object areas according to the motion parameters and producing and outputting a motion compensated prediction image.
Claim 3
Dependent Claim
41 words
A motion compensation apparatus as claimed in claim 1, wherein the area subdividing means subdivides the reference image into sub-areas using at least one of a region growing method, a dividing method, a split and merge method, and a clustering method.
Claim 4
Dependent Claim
30 words
A motion compensation apparatus as claimed in claim 1, wherein the moving area detecting means checks a plurality of sub-areas and designates as moving areas sub-areas having large inter-frame differences.
Claim 5
Dependent Claim
29 words
A motion compensation apparatus as claimed in claim 1, wherein the area integrating means integrates adjacent moving areas having similar characteristics equal to or more than a predetermined value.
Claim 6
Dependent Claim
37 words
A motion compensation; apparatus as claimed in claim 1, wherein the motion estimating means establishes, by use of the moving object areas as templates, matching with respect to a current frame image and thus attains motion parameters.
Claim 7
Dependent Claim
42 words
A motion compensation apparatus as claimed in claim 1, wherein the motion compensating means initializes the motion compensated prediction image to predetermined values and overwrites the predetermined values with values corresponding to a displaced and transformed image of the moving object areas.
Claim 8
Dependent Claim
127 words
A motion compensation method of inter-frame prediction comprising the steps of: subdividing a reference image into sub-areas and producing a subdivided area; producing inter-frame difference information between an input image and the reference image; detecting, by reference to the inter-frame difference information, sub-areas of the subdivided area having inter-frame difference information of a predetermined character and designating said sub-areas as moving areas; integrating the moving areas and outputting the integrated areas as moving object areas; estimating inter-frame motion between the input and reference images for each of the moving object areas and outputting motion parameters representing motion of the moving object areas; and conducting motion compensation for each of the moving object areas according to the motion parameters and producing and outputting a motion compensated prediction image.
Claim 9
Dependent Claim
127 words
A motion compensation method of inter-frame prediction comprising the steps of: subdividing a reference image into sub-areas and producing a subdivided area; producing inter-frame difference information between an input image and the reference image; detecting, by reference to the inter-frame difference information, sub-areas of the subdivided area having inter-frame difference information of a predetermined character and designating said sub-areas as moving areas; integrating the moving areas and outputting the integrated areas as moving object areas; estimating inter-frame motion between the input and reference images for each of the moving object areas and outputting motion parameters representing motion of the moving object areas; and conducting motion compensation for each of the moving object areas according to the motion parameters and producing and outputting a motion compensated prediction image.
Claim 10
Dependent Claim
42 words
A motion compensation method as claimed in claim 7, wherein the area subdividing step subdivides the reference image into, sub-areas using at least one of a region growing method, a dividing method, a split and merge method, method, and a clustering method.
Claim 11
Dependent Claim
30 words
A motion compensation method as claimed in claim 7, wherein the moving area detecting step checks a plurality of sub-areas and designates as moving areas sub-areas having large inter-frame differences.
Claim 12
Dependent Claim
29 words
A motion compensation method as claimed in claim 7, wherein the area integrating step integrates adjacent moving areas having similar characteristics equal to or more than a predetermined value.
Claim 13
Dependent Claim
37 words
A motion compensation method as claimed in claim 7, wherein the motion estimating step establishes, by use of the mobile object areas as templates, matching with respect to a current frame image and thus attains motion parameters.
Claim 14
Dependent Claim
42 words
A motion compensation method as claimed in claim 7, wherein the motion compensating step initializes the motion compensation estimated image to predetermined values and overwrites the predetermined values with values corresponding to a displaced and transformed image of the moving object areas.
References Cited (Backward Citations)
US4779131A
Cited
US5177608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-11-05 | 2000-05-06 | 2000-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-05 | 2004-05-06 | 2004-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-05 | 2008-05-06 | 2008-11-05 | $7700.00 | Window Closed / Lapsed |