US5159453A
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Video processing method and apparatus
Assignee: RealD Inc
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Filing: 1990-09-07
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Granted: 1992-10-27
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Expires: 2010-09-07
Abstract
Abstract A method and apparatus is disclosed for combining a first video signal representative of a first image and a second video signal representative of a second image. In one embodiment, the first video signal is filtered to remove high frequency two-dimensional diagonal frequency components therefrom. The second video signal is also filtered to remove high frequency two-dimensional diagonal frequency components therefrom. The filtered second video signal is two-dimensionally modulated, and the filtered first video signal is combined with said modulated filtered second video signal. In a further embodiment, filtered signals are spatially decimated and combined.
Inventors
- 👤 Robert Dhein
- 👤 Gregory Glass
- 👤 Albert Cerullo
- 👤 Louis Schure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:40
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/015; H04N7/08; H04N7/0806; H04N19/00; H04N19/30
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
76 words
A method for combining a first video signal representative of a first image and a second video signal representative of a second image, comprising the steps of: filtering said first video signal to remove high frequency two-dimensional diagonal frequency components therefrom; filtering said second video signal to remove high frequency two-dimensional diagonal frequency components therefrom; two-dimensionally modulating the filtered second video signal; and combining said filtered first video signal with said modulated filtered second video signal.
Claim 2
Independent Claim
76 words
A method for combining a first video signal representative of a first image and a second video signal representative of a second image, comprising the steps of: filtering said first video signal to remove high frequency two-dimensional diagonal frequency components therefrom; filtering said second video signal to remove high frequency two-dimensional diagonal frequency components therefrom; two-dimensionally modulating the filtered second video signal; and combining said filtered first video signal with said modulated filtered second video signal.
Claim 3
Dependent Claim
27 words
The method as defined by claim 1, wherein said first and second video signals are electronic video signals, and said first and second images are different images.
Claim 4
Dependent Claim
29 words
The method as defined by claim 2, wherein said step of two-dimensionally modulating the filtered second video signal comprises modulating said filtered second video signal on a two-dimensional carrier.
Claim 5
Dependent Claim
53 words
The method as defined by claim 3, said second video signal has a video sampling frequency associated therewith and wherein said two-dimensional carrier has a vertical frequency of about half the video sampling frequency of said second signal and a horizontal frequency of about half the sampling frequency of said second video signal.
Claim 6
Dependent Claim
26 words
The method as defined by claim 1, wherein said step of filtering said first video signal comprises filtering said video signal with a two-dimensional low-pass filter.
Claim 7
Dependent Claim
27 words
The method as defined by claim 1, wherein said step of filtering said second video signal comprises filtering said second video signal with a two-dimensional low-pass filter.
Claim 8
Dependent Claim
27 words
The method as defined by claim 5, wherein said step of filtering said second video signal comprises filtering said second video signal with a two-dimensional low-pass filter.
Claim 9
Dependent Claim
29 words
The method as defined by claim 7, wherein said step of two-dimensionally modulating the filtered second video signal comprises modulating said filtered second video signal on a two-dimensional carrier.
Claim 10
Dependent Claim
53 words
The method as defined by claim 8, said second video signal has a video sampling frequency associated therewith and, wherein said two-dimensional carrier has a vertical frequency of about half the video sampling frequency of said second signal and a horizontal frequency of about half the sampling frequency of said second video signal.
Claim 11
Dependent Claim
44 words
The method as defined by claim 2, wherein said step of two-dimensionally modulating the filtered second video signal comprises modulating said signal to obtain a two-dimensional frequency spectrum which does not substantially overlap with the two-dimensional frequency spectrum of the filtered first video signal.
Claim 12
Dependent Claim
44 words
The method as defined by claim 9, wherein said step of two-dimensionally modulating the filtered second video signal comprises modulating said signal to obtain a two-dimensional frequency spectrum which does not substantially overlap with the two-dimensional frequency spectrum of the filtered first video signal.
Claim 13
Dependent Claim
42 words
The method as defined by claim 10, wherein said step of filtering said first video signal to remove high frequency two-dimensional diagonal frequency components therefrom comprises filtering said first video signal to obtain a two-dimensional frequency spectrum within a substantially triangular boundary.
Claim 14
Dependent Claim
42 words
The method as defined by claim 11, wherein said step of filtering said first video signal to remove high frequency two-dimensional diagonal frequency components therefrom comprises filtering said first video signal to obtain a two-dimensional frequency spectrum within a substantially triangular boundary.
Claim 15
Dependent Claim
38 words
The method as defined by claim 12, wherein the shape of said boundary is approximately defined by f.sub.v +f.sub.h =constant where f h and f v are, respectively, the maximum horizontal and vertical frequencies in said two-dimensional spectrum.
Claim 16
Dependent Claim
38 words
The method as defined by claim 13, wherein the shape of said boundary is approximately defined by f.sub.v +f.sub.h =constant where f h and f v are, respectively, the maximum horizontal and vertical frequencies in said two-dimensional spectrum.
Claim 17
Dependent Claim
38 words
The method as defined by claim 2, wherein said step of combining said filtered first video signal with said modulated filtered second video signal comprises adding said filtered firs video signal and said modulated filtered second video signal.
Claim 18
Dependent Claim
21 words
The method as defined by claim 2, further comprising the step of storing the combined signal obtained from said combining step.
Claim 19
Dependent Claim
21 words
The method as defined by claim 2, further comprising the step of transmitting the combined signal obtained from said combining step.
Claim 20
Dependent Claim
22 words
A method as defined by claim 17, further comprising recovering said first video signal and second video signal from said combined signal.
Claim 21
Dependent Claim
22 words
A method as defined by claim 18, further comprising recovering said first video signal and second video signal from said combined signal.
Claim 22
Dependent Claim
45 words
The method as defined by claim 19, wherein said recovering comprises: two-dimensional diagonal low pass filtering said combined signal to recover said first video signal; and two-dimensionally modulating said combined signal and two-dimensional low pass filtering the resultant signal to recover said second video signal.
Claim 23
Dependent Claim
45 words
The method as defined by claim 19, wherein said recovering comprises: two-dimensional diagonal low pas filtering said combined signal to recover said first video signal; and two-dimensionally modulating said combined signal and two-dimensional low pass filtering the resultant signal to recover said second video signal.
Claim 24
Dependent Claim
20 words
The method as defined by claim 19, further comprising the steps of displaying said recovered first and second video signals.
Claim 25
Dependent Claim
20 words
The method as defined by claim 20, further comprising the steps of displaying said recovered first and second video signals.
Claim 26
Dependent Claim
141 words
For use in conjunction with a method for combining a first video signal representative of a first image and a second video signal representative of a second image, said method including the steps of: filtering said first video signal to remove high frequency two-dimensional diagonal frequency components therefrom; filtering said second video signal to remove high frequency two-dimensional diagonal frequency components therefrom; two-dimensionally modulating the filtered second video signal; and combining said filtered first video signal with said modulated filtered second video signal to produce a combined signal; a method for processing the combined signal to recover said first and second video signals, comprising the steps of: two-dimensionally diagonal low pass filtering said combined signal to recover said first video signal; and two-dimensionally modulating said combined signal and two-dimensional low pass filtering the resultant signal to recover said second video signal.
Claim 27
Dependent Claim
141 words
For use in conjunction with a method for combining a first video signal representative of a first image and a second video signal representative of a second image, said method including the steps of: filtering said first video signal to remove high frequency two-dimensional diagonal frequency components therefrom; filtering said second video signal to remove high frequency two-dimensional diagonal frequency components therefrom; two-dimensionally modulating the filtered second video signal; and combining said filtered first video signal with said modulated filtered second video signal to produce a combined signal; a method for processing the combined signal to recover said first and second video signals, comprising the steps of: two-dimensionally diagonal low pass filtering said combined signal to recover said first video signal; and two-dimensionally modulating said combined signal and two-dimensional low pass filtering the resultant signal to recover said second video signal.
Claim 28
Dependent Claim
20 words
The method as defined by claim 25, further comprising the steps of displaying said recovered first and second video signals.
Claim 29
Independent Claim
59 words
A method for combining a first video signal representative of a first image and a second video signal representative of a second different image, comprising the steps of: two-dimensionally modulating said second video signal on a two-dimensional carrier, said two-dimensionally modulating including vertical modulation and horizontal modulation; and combining said modulated second video signal with said first video signal.
Claim 30
Independent Claim
59 words
A method for combining a first video signal representative of a first image and a second video signal representative of a second different image, comprising the steps of: two-dimensionally modulating said second video signal on a two-dimensional carrier, said two-dimensionally modulating including vertical modulation and horizontal modulation; and combining said modulated second video signal with said first video signal.
Claim 31
Dependent Claim
59 words
Apparatus for combining a first video signal representative of a first image and a second video signal representative of a second different image, comprising: means for two-dimensionally modulating said second video signal on a two-dimensional carrier, said two-dimensionally modulating including vertical modulation and horizontal modulation; and means for combining said modulated second video signal with said first video signal.
Claim 32
Dependent Claim
59 words
Apparatus for combining a first video signal representative of a first image and a second video signal representative of a second different image, comprising: means for two-dimensionally modulating said second video signal on a two-dimensional carrier, said two-dimensionally modulating including vertical modulation and horizontal modulation; and means for combining said modulated second video signal with said first video signal.
Claim 33
Independent Claim
53 words
A method for encoding a video signal, comprising the steps of: frequency separating the signal into first and second portions by two-dimensional diagonal filtering; two-dimensionally modulating the second portion on a two-dimensional carrier, said two dimensional modulating including vertical modulation and horizontal modulation; and combining the first portion and the modulated second portion.
Claim 34
Independent Claim
53 words
A method for encoding a video signal, comprising the steps of: frequency separating the signal into first and second portions by two-dimensional diagonal filtering; two-dimensionally modulating the second portion on a two-dimensional carrier, said two dimensional modulating including vertical modulation and horizontal modulation; and combining the first portion and the modulated second portion.
Claim 35
Dependent Claim
23 words
The method as defined by claim 29, wherein said second portion comprises signals having higher frequency than the signals of said fist portion.
Claim 36
Independent Claim
64 words
A method for transmitting electronic video signals with improved interference immunity, comprising the steps of: filtering at least one of said electronic video signals to remove high frequency two-dimensional diagonal frequency components therefrom; two-dimensionally modulating the filtered video signal on a two-dimensional subcarrier, said two dimensional modulating including vertical modulation and horizontal modulation; and transmitting the at least one filtered and modulated video signal.
Claim 37
Independent Claim
64 words
A method for transmitting electronic video signals with improved interference immunity, comprising the steps of: filtering at least one of said electronic video signals to remove high frequency two-dimensional diagonal frequency components therefrom; two-dimensionally modulating the filtered video signal on a two-dimensional subcarrier, said two dimensional modulating including vertical modulation and horizontal modulation; and transmitting the at least one filtered and modulated video signal.
Claim 38
Independent Claim
106 words
A method for encoding and transmitting a plurality of electronic video signals with improved interference immunity, comprising the steps of: filtering at least one of said electronic video signals to remove high frequency two-dimensional diagonal frequency components therefrom; transmitting said at least one filtered video signal; filtering at least a further one of said electronic video signals to remove high frequency two-dimensional diagonal frequency components therefrom; two-dimensionally modulating said filtered at least further one of said video signals on a two-dimensional subcarrier, said two dimensional modulating including vertical modulation and horizontal modulation; and transmitting the modulated and filtered at least further one of said video signals.
Claim 39
Independent Claim
106 words
A method for encoding and transmitting a plurality of electronic video signals with improved interference immunity, comprising the steps of: filtering at least one of said electronic video signals to remove high frequency two-dimensional diagonal frequency components therefrom; transmitting said at least one filtered video signal; filtering at least a further one of said electronic video signals to remove high frequency two-dimensional diagonal frequency components therefrom; two-dimensionally modulating said filtered at least further one of said video signals on a two-dimensional subcarrier, said two dimensional modulating including vertical modulation and horizontal modulation; and transmitting the modulated and filtered at least further one of said video signals.
Claim 40
Independent Claim
84 words
A method for combining a first video si representative of a first image and a second video signal representative of a second image, comprising the steps of: filtering said first video signal to remove high frequency two-dimensional diagonal frequency components therefrom; filtering said second video signal to remove high frequency two-dimensional diagonal frequency components therefrom; spatially decimating the filtered first video signal; spatially decimating the filtered second video signal; and combining the spatially decimated first video signal with the spatially decimated second video signal.
Claim 41
Independent Claim
84 words
A method for combining a first video si representative of a first image and a second video signal representative of a second image, comprising the steps of: filtering said first video signal to remove high frequency two-dimensional diagonal frequency components therefrom; filtering said second video signal to remove high frequency two-dimensional diagonal frequency components therefrom; spatially decimating the filtered first video signal; spatially decimating the filtered second video signal; and combining the spatially decimated first video signal with the spatially decimated second video signal.
Claim 42
Dependent Claim
20 words
The method as defined by claim 33, further comprising time base correcting said spatially decimated signals before the combining thereof.
Claim 43
Dependent Claim
21 words
The method as defined by claim 33, further comprising the step of transmitting the combined signal obtained from said combining step.
Claim 44
Dependent Claim
29 words
The method as defined by claim 35, further comprising receiving the transmitted combined signal and recovering said first video signal and second video signal from said received combined 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) | 1995-10-27 | 1996-04-27 | 1996-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-27 | 2000-04-27 | 2000-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-27 | 2004-04-27 | 2004-10-27 | $7700.00 | Window Closed / Lapsed |