Patent EP0644695A2 successfully refreshed from Google Patents.
EP0644695A2
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EP
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Spatially scalable video encoding and decoding
Assignee: Iconectiv LLC
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Filing: 1994-09-14
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Granted: —
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Expires: 2014-09-14
Abstract
Abstract Video images of varying resolutions are derived from one video signal (VIDIN) with high bandwidth efficiency by employing a new two-layer video coding technique using spatial scalability in which the prediction taken from one layer (1140) is combined with the prediction taken from the other layer (1180), and the combined prediction is used to code one of the layers (in 1180). In an illustrative example of the invention employing a base-layer and an enhancement-layer, the spatially interpolated base-layer (on 1170) is combined, by the selection of appropriate weights, with the motion compensated temporal prediction of the enhancement layer to generate the prediction used to encode the enhancement-layer (in 1180). Weights are selected based on a calculation of the sum of the absolute differences, or the sum of the squares of the differences between the prediction and reference macroblocks to produce the prediction giving the best bandwidth efficiency. This weighting process is called spatio-temporal weighting.
Inventors
- 👤 Atul Puri
- 👤 Andria Hafong Wong
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 21:55
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/60; H04N19/61; H04N19/50; H04N19/30
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
148 words
A method of encoding a video signal comprising the steps of: receiving a digital video signal including a succession of digital representations related to picture elements of a video image where said digital video signal has a characteristic resolution; producing a first encoded version of said received digital video signal having a resolution less than or equal to said characteristic resolution; producing a second encoded version of said received digital video signal having a resolution equal to said characteristic resolution; producing a first prediction of said video image from said first encoded version of said received digital video signal; producing a second prediction of said video image from said second encoded version of said received digital video signal; combining said first prediction and said second prediction to produce a combined prediction; and employing said combined prediction to encode said second encoded version of said received digital video signal;
Claim 2
Dependent Claim
19 words
The method of claim 1 in which said step of producing said first prediction includes producing a spatial prediction.
Claim 3
Dependent Claim
19 words
The method of claim 2 in which said step of producing said second prediction includes producing a temporal prediction.
Claim 4
Dependent Claim
26 words
The method of claim 3 in which said step of combining includes weighting said spatial prediction and weighting said temporal prediction to produce said combined prediction.
Claim 5
Dependent Claim
37 words
The method of claim 1 in which said step of encoding a first encoded version includes encoding an interlaced version of said received digital video signal, or encoding a progressive version of said received digital video signal.
Claim 6
Dependent Claim
35 words
The method of claim 5 in which said step of encoding a second encoded version includes encoding an interlaced version of said received digital signal, or encoding a progressive version of said received digital signal.
Claim 7
Dependent Claim
33 words
The method of claim 1 in which said step of encoding a first encoded version includes encoding using MPEG-1 coding standards, or encoding using H.261 coding standards, or encoding using MPEG-2 coding standards.
Claim 8
Dependent Claim
21 words
The method of claim 7 in which said step of encoding a second encoded version includes encoding using MPEG-2 encoding standards.
Claim 9
Dependent Claim
32 words
A method of decoding said first encoded version and said second encoded version of claim 1 for producing an unencoded video signal having at least one of a plurality of predetermined characteristics.
Claim 10
Dependent Claim
33 words
The method of claim 9 wherein said at least one of a plurality of predetermined characteristics is resolution scale, or said at least one of a plurality of predetermined characteristics is picture format.
Claim 11
Independent Claim
166 words
An apparatus for encoding a video signal comprising: a receiver for receiving a digital video signal including a succession of digital representations related to picture elements of a video image where said digital video signal has a characteristic resolution; a means for producing a first encoded version of said received digital video signal having a resolution less than or equal to said characteristic resolution; a means for producing a second encoded version of said received digital video signal having a resolution equal to said characteristic resolution; a means for producing a first prediction of said video image form said first encoded version of said received digital video signal; a means for producing a second prediction of said video image forms said second encoded version of said received digital video signal; a means for combining said first prediction and said second prediction to produce a combined prediction; and a means for employing said combined prediction to encode said second encoded version of said received digital video signal.
Claim 12
Dependent Claim
22 words
The apparatus of claim 11 in which said means for producing said first prediction includes a means for producing a spatial prediction.
Claim 13
Dependent Claim
22 words
The apparatus of claim 12 in which said means for producing said second prediction includes a means for producing a temporal prediction.
Claim 14
Dependent Claim
32 words
The apparatus of claim 13 in which said means for combining includes a means for weighting said spatial prediction and a means for weighting said temporal prediction to produce said combined prediction.
Claim 15
Dependent Claim
29 words
The apparatus of claim 11 in which said means for encoding a first encoded version includes a means for encoding an interlaced version of said received digital video signal.
Claim 16
Dependent Claim
29 words
The apparatus of claim 11 in which said means for encoding a first encoded version includes a means for encoding a progressive version of said received digital video signal.
Claim 17
Dependent Claim
30 words
The apparatus of claim 15 or 16 in which said means for encoding a second encoded version includes a means for encoding an interlaced version of said received digital signal.
Claim 18
Dependent Claim
30 words
The apparatus of claim 15 or 16 in which said means for encoding a second encoded version includes a means for encoding a progressive version of said received digital signal.
Claim 19
Dependent Claim
42 words
The apparatus of claim 11 in which said means for encoding a first encoded version includes a means for encoding using MPEG-1 coding standards, or a means for encoding using H.261 coding standards, or a means for encoding using MPEG-2 coding standards.
Claim 20
Dependent Claim
24 words
The apparatus of claim 19 in which said means for encoding a second encoded version includes a means for encoding using MPEG-2 encoding standards.
References Cited (Backward Citations)
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