US5072296A
Expired / Lapsed
US
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Video frame reduction/reconstruction method and apparatus
Assignee: Massachusetts Institute of Technology
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Filing: 1990-02-23
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Granted: 1991-12-10
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Expires: 2010-02-23
Abstract
Abstract A method and apparatus for reducing the amount of video information which is transmitted to a receiver, while still enabling the receiver to reconstruct a representation of the original video source material. In a preferred embodiment, a 60 frames per second progressively scanned video signal is transmitted at a 30 frames per second rate accompanied by decoding information. In short, every other frame is deleted and a respective nearest neighbor is selected to represent the deleted frame. This selection is represented by a digital selection information. Thus the transmitted frame information can be reconstructed into the original video source material after decoding with the digital selection information.
Inventors
- 👤 Jae S. Lim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:38
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/12; H04N7/122; H04N7/01; H04N7/0112
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
109 words
A method of reducing the information required to represent a multiplicity of sequential frames of video source material having a frame rate of N frames per second, comprising the steps of selecting a subset of the multiplicity of frames, selecting a given frame not in the subset and for the given frame making a determination of which frames of the subset are its respective leading and trailing neighbors and which of these neighbors should be used to represent the given frame, and representing this determination with selection information, whereby a representation of a portion of the video source material may be generated with the selection information and the subset.
Claim 2
Independent Claim
109 words
A method of reducing the information required to represent a multiplicity of sequential frames of video source material having a frame rate of N frames per second, comprising the steps of selecting a subset of the multiplicity of frames, selecting a given frame not in the subset and for the given frame making a determination of which frames of the subset are its respective leading and trailing neighbors and which of these neighbors should be used to represent the given frame, and representing this determination with selection information, whereby a representation of a portion of the video source material may be generated with the selection information and the subset.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein the representing comprises transmitting the subset of frames and selection information over a communication channel.
Claim 4
Dependent Claim
29 words
The method of claim 1 wherein every other frame is in the subset so that the multiplicity of frames is processed at a rate of N/2 frames per second.
Claim 5
Dependent Claim
42 words
The method of claim 1 wherein the step of determining which neighbors should be used to represent a given frame includes determining the differences between the frame not in the subset and the neighbors and selecting the neighbor that satisfies a criterion.
Claim 6
Dependent Claim
40 words
The method of claim 4 wherein the nearest neighbor trailing the frame not in the subset is selected unless the difference attributed to the trailing neighbor is greater by a preset percentage than the difference attributed to the other neighbor.
Claim 7
Dependent Claim
40 words
The method of claim 4 wherein the nearest neighbor leading the frame not in the subset is selected unless the difference attributed to the leading neighbor is greater by a preset percentage than the difference attributed to the other neighbor.
Claim 8
Dependent Claim
11 words
The method of claim 4 wherein the differences are energy differences.
Claim 9
Independent Claim
126 words
A method of reducing broadcast information by representing video source material having a frame rate of N frames per second with video source material having a frame rate of M frames per second, where N>M, comprising the steps of capturing a segment of the N frames per second video source material having a first, middle and third consecutive frame, determining the content difference between the first and middle and the middle and third frames, selecting either the first or third frame to represent the middle frame and representing this selection with selection information, and maintaining as broadcast material the first and third video frame and the selection information, whereby a representation of the captured segment of the video material can be generated from the broadcast material.
Claim 10
Independent Claim
126 words
A method of reducing broadcast information by representing video source material having a frame rate of N frames per second with video source material having a frame rate of M frames per second, where N>M, comprising the steps of capturing a segment of the N frames per second video source material having a first, middle and third consecutive frame, determining the content difference between the first and middle and the middle and third frames, selecting either the first or third frame to represent the middle frame and representing this selection with selection information, and maintaining as broadcast material the first and third video frame and the selection information, whereby a representation of the captured segment of the video material can be generated from the broadcast material.
Claim 11
Dependent Claim
19 words
The method of claim 8 wherein maintaining as broadcast material includes transmitting the broadcast material over a communication channel.
Claim 12
Dependent Claim
12 words
The method of claim 8 wherein the content differences are energy differences.
Claim 13
Dependent Claim
7 words
The method of claim 10 wherein M=N/2.
Claim 14
Dependent Claim
9 words
The method of claim 11 wherein N=60 and M=30.
Claim 15
Dependent Claim
27 words
The method of claim 8 wherein determining the content difference comprises the step of determining the differences between the middle frame and the first and third frames.
Claim 16
Dependent Claim
33 words
The method of claim 13 wherein the third frame is selected unless the difference attributed to the third frame is greater by a preset percentage than the difference attributed to the first frame.
Claim 17
Dependent Claim
33 words
The method of claim 13 wherein the first frame is selected unless the difference attributed to the first frame is greater by a preset percentage than the difference attributed to the third frame.
Claim 18
Independent Claim
114 words
An apparatus for reducing the information required to represent a multiplicity of sequential frames of video source material having a frame rate of N frames per second, comprising a circuit for selecting a subset of the multiplicity of frames, a circuit for selecting a given frame not in the subset and for the given frame making a determination which frames of the subset are its respective leading and trailing neighbors and which of these neighbors should be used to represent the given frame, and a circuit for representing this determination with selection information, whereby a representation of a portion of the video source material may be generated with the selection information and the subset.
Claim 19
Independent Claim
114 words
An apparatus for reducing the information required to represent a multiplicity of sequential frames of video source material having a frame rate of N frames per second, comprising a circuit for selecting a subset of the multiplicity of frames, a circuit for selecting a given frame not in the subset and for the given frame making a determination which frames of the subset are its respective leading and trailing neighbors and which of these neighbors should be used to represent the given frame, and a circuit for representing this determination with selection information, whereby a representation of a portion of the video source material may be generated with the selection information and the subset.
Claim 20
Dependent Claim
26 words
The apparatus of claim 16 wherein the circuit for representing comprises a circuit for transmitting the subset of frames and selection information over a communication channel.
Claim 21
Dependent Claim
29 words
The apparatus of claim 16 wherein every other frame is in the subset so that the multiplicity of frames is processed at a rate of N/2 frames per second.
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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) | 1994-12-09 | 1995-06-10 | 1995-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-09 | 1999-06-10 | 1999-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-09 | 2003-06-10 | 2003-12-10 | $7700.00 | Window Closed / Lapsed |