Method for motion-compensated prediction of moving images and device for performing said method
First Claim
Patent Images
1. A process for motion-compensated prediction of moving images or pictures using an interpolation method considering past image points as well as neighboring image points, said process comprising the steps of:
- a) making a motion-compensated picture signal (ŝ
tri(t−
1)) using past image point information (stri(t−
2)), wherein said past image point information is displaced or shifted to obtain said motion-compensated picture signal (ŝ
tri(t−
1)) according to a product of a scanning rate increase factor (L) and a previously determined motion vector (d(t−
1));
b) producing an intermediate picture (se(t−
1)) from a reference picture (s′
(t−
1)) by increasing scanning rate by said scanning rate increase factor (L) and inserting marker values (m) at intervening points between image points of the reference picture (s′
(t−
1)) to form an interpolation raster; and
c) replacing said marker values (m) in said intermediate picture (se(t−
1)) at locations in said intermediate picture where image point information of said motion-compensated picture signal (ŝ
tri(t−
1)) is present with said image point information of said motion-compensated picture signal (ŝ
tri(t−
1)) and retaining values in said intermediate picture at other locations in said intermediate picture where image point information of said motion-compensated picture signal is not present.
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Abstract
Past image point information is also considered as well as local neighboring image point information in the interpolation of a predicted picture for motion-compensated prediction of moving pictures with increased resolution. Motion-compensated image point information is used in the interpolation raster between the scanned values of the reference picture (s′(t−1)) for the predicted picture of increased resolution.
15 Citations
7 Claims
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1. A process for motion-compensated prediction of moving images or pictures using an interpolation method considering past image points as well as neighboring image points, said process comprising the steps of:
-
a) making a motion-compensated picture signal (ŝ
tri(t−
1)) using past image point information (stri(t−
2)), wherein said past image point information is displaced or shifted to obtain said motion-compensated picture signal (ŝ
tri(t−
1)) according to a product of a scanning rate increase factor (L) and a previously determined motion vector (d(t−
1));b) producing an intermediate picture (se(t−
1)) from a reference picture (s′
(t−
1)) by increasing scanning rate by said scanning rate increase factor (L) and inserting marker values (m) at intervening points between image points of the reference picture (s′
(t−
1)) to form an interpolation raster; andc) replacing said marker values (m) in said intermediate picture (se(t−
1)) at locations in said intermediate picture where image point information of said motion-compensated picture signal (ŝ
tri(t−
1)) is present with said image point information of said motion-compensated picture signal (ŝ
tri(t−
1)) and retaining values in said intermediate picture at other locations in said intermediate picture where image point information of said motion-compensated picture signal is not present. - View Dependent Claims (2)
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3. A device for motion-compensated prediction of moving images or pictures comprising a time recursive interpolation filter;
wherein said time recursive interpolation filter includes means (1) for increasing a scanning rate of a reference picture (s′
(t−
1)) by a scanning rate increase factor (L) and for inserting marker values (m) at intervening points between image points of the reference picture (s′
(t−
1)) to form an interpolation raster and an intermediate picture signal (se(t−
1));an image memory (2) for storing past image point information (stri(t−
2));means (4) for making a motion-compensated picture signal (ŝ
tri(t−
1)) using said past image point information (stri(t−
2)) according to a product of said scanning rate increase factor (L) and a previously determined motion vector (d(t−
1)); anda merging module (3) for replacing said marker values (m) in said intermediate picture (se(t−
1)) at locations where image point information of said motion-compensated picture signal (ŝ
tri(t−
1)) is present with said image point information of said motion-compensated picture signal (ŝ
tri(t−
1)) and retaining values in said intermediate picture at other locations in said intermediate picture where image point information of said motion-compensated picture signal is not present.- View Dependent Claims (4, 5)
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6. A process for motion-compensated prediction of moving images or pictures using an interpolation method considering past image points as well as neighboring image points, said process comprising the steps of:
-
a) producing an intermediate picture (se(t−
1)) from a reference picture (s′
(t−
1)) by increasing scanning rate by a scanning rate increase factor (L) and inserting marker values (m) at intervening points between image points of the reference picture (s′
(t−
1)) to form an interpolation raster;b) making a motion-compensated picture signal (ŝ
tri(t−
1)) using past image point information (stri(t−
2)), wherein said past image point information is displaced or shifted to obtain said motion-compensated picture signal (ŝ
tri(t−
1)) according to a product of said scanning rate increase factor (L) and a previously determined motion vector (d(t−
1)); andc) replacing said marker values (m) in said intermediate picture (se(t−
1)) at locations in said intermediate picture where image point information of said motion-compensated picture signal (ŝ
tri(t−
1)) is present with said image point information of said motion-compensated picture signal (ŝ
tri(t−
1)) and retaining values in said intermediate picture at other locations in said intermediate picture where image point information of said motion-compensated picture signal is not present. - View Dependent Claims (7)
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Specification