US3585286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spatial filter color encoding and image reproducing apparatus and system
Assignee: SRI International Inc
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Filing: 1968-12-26
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Granted: 1971-06-15
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Expires: 1988-12-26
Abstract
Abstract A filter is provided in the path of light from a scene, either live or on film, ultimately to be displayed as on a television tube. The filter has the property of encoding color information in the intensity pattern of light transmitted. The encoded intensity pattern may be used directly or recorded and regenerated. The encoding medium of the filter comprises at least three grids superimposed one upon another and disposed at different angles relative to a reference whereby at least four different bands of frequencies are generated when the encoded intensity pattern is scanned, as by a photocathode. That is, a first band of frequencies is generated including a waveform (a video signal) proportionate to variations in light intensity, two individual bands of frequencies are generated each in separate individual waveforms (video signals) modulated in accordance with intensity variations of a different one selected component color, and a fourth individual band of frequencies is generated in a waveform modulated in accordance with intensity variations in color components including still another selected component color. The frequency bands are separated by filters and used to generate a color picture on a color receiver by applying the waveform incorporating the intensity band of frequencies (the first band) to the receiver to give the general picture luminance information, applying the waveforms containing the second, third, and fourth bands of frequencies to a processor (e.g. the matrix of a colorplexer) for developing color difference signals that are applied to the receiver along with the first band of frequencies, thereby to develop a color balanced picture.
Inventors
- 👤 Albert Macovski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:08
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/03
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
134 words
In a system for generating electrical waveforms from which a color television receiver may reproduce a color picture from a light intensity pattern, A. A filter for transmitting light from a scene to be produced and producing a light intensity pattern with encoded color information from which the color picture may be produced, said filter comprising 1. at least three grids superimposed one upon another and disposed at different angles relative to a reference in a manner so that the angles, where the lines of one of the grids cross the lines of second grid differ from the angles made where the lines of the third grid cross the lines of said second grid, 2. each of said grids comprising parallel spaced lines with the spaces between the lines passing light of all colors,
Claim 2
Dependent Claim
134 words
In a system for generating electrical waveforms from which a color television receiver may reproduce a color picture from a light intensity pattern, A. A filter for transmitting light from a scene to be produced and producing a light intensity pattern with encoded color information from which the color picture may be produced, said filter comprising 1. at least three grids superimposed one upon another and disposed at different angles relative to a reference in a manner so that the angles, where the lines of one of the grids cross the lines of second grid differ from the angles made where the lines of the third grid cross the lines of said second grid, 2. each of said grids comprising parallel spaced lines with the spaces between the lines passing light of all colors,
Claim 3
Dependent Claim
27 words
The lines of at least two of said grids each being of different subtractive primary colors, and 4. the lines of the said third grid being grey.
Claim 4
Dependent Claim
27 words
The lines of at least two of said grids each being of different subtractive primary colors, and 4. the lines of the said third grid being grey.
Claim 5
Dependent Claim
19 words
each of said grids comprising parallel spaced lines with the spaces between the lines passing light of all colors,
Claim 6
Dependent Claim
19 words
each of said grids comprising parallel spaced lines with the spaces between the lines passing light of all colors,
Claim 7
Dependent Claim
20 words
Apparatus as defined in claim 1 wherein the line density of at least two of said grids is the same.
Claim 8
Dependent Claim
23 words
Apparatus as defined in claim 1 wherein the said lines of the three grids of said filter are cyan, yellow and grey, respectively.
Claim 9
Dependent Claim
17 words
The lines of at least two of said grids each being of different subtractive primary colors, and
Claim 10
Dependent Claim
17 words
The lines of at least two of said grids each being of different subtractive primary colors, and
Claim 11
Dependent Claim
9 words
the lines of the said third grid being grey.
Claim 12
Dependent Claim
9 words
the lines of the said third grid being grey.
Claim 13
Dependent Claim
35 words
Apparatus as defined in claim 1 wherein the said lines of the three grids of said filter are cyan, yellow and grey and at least the cyan and yellow grids are of the same density.
Claim 14
Dependent Claim
54 words
Apparatus as defined in claim 1 wherein the said lines of said three grids are cyan, yellow, and greY respectively, and the said yellow lines are disposed at a 45* angle relative to the cyan lines and said grey lines are disposed at an angle of less than 45* relative to said cyan lines.
Claim 15
Dependent Claim
37 words
Apparatus as recited in claim 1 wherein the relative angle between said first two grids is 45* and the lines of said third grid are disposed at an angle between those of said first and second grids.
Claim 16
Dependent Claim
21 words
Apparatus as defined in claim 6 wherein the line density of at least the said first two grids is the same.
Claim 17
Independent Claim
45 words
A system for generating color encoded electrical waveforms required for a color television receiver to reproduce a scene in color including in combination A. Filter means exposed to and transmitting light from a scene to be reproduced for producing a color encoded light intensity pattern,
Claim 18
Independent Claim
45 words
A system for generating color encoded electrical waveforms required for a color television receiver to reproduce a scene in color including in combination A. Filter means exposed to and transmitting light from a scene to be reproduced for producing a color encoded light intensity pattern,
Claim 19
Dependent Claim
21 words
A system as defined in claim 8 wherein the line density of at least two of said grids is the same.
Claim 20
Dependent Claim
24 words
A system as defined in claim 8 wherein the said lines of the three grids of said filter are cyan, yellow and grey respectively.
Claim 21
Dependent Claim
36 words
A system as defined in claim 8 wherein the said lines of the three grids of said filter are cyan, yellow and grey and at least the cyan and yellow grids are of the same density.
Claim 22
Dependent Claim
55 words
A system as defined in claim 8 wherein the said lines of said three grids are cyan, yellow, and grey respectively and the said yellow lines are disposed at a 45* angle relative to the cyan lines and said grey lines are disposed at an angle of less than 45* relative to said cyan lines.
Claim 23
Dependent Claim
38 words
A system as defined in claim 8 wherein the relative angle between said first two grids is 45* and the lines of said third grid are disposed at an angle between those of said first and second grids.
Claim 24
Dependent Claim
22 words
A system as defined in claim 13 wherein the line density of at least the said first two grids is the same.
Claim 25
Dependent Claim
71 words
A system as defined in claim 8 wherein the electrical waveforms generated by said scanning means include A. first relatively low frequency band proportionate to general scene luminance B. second and third electrical waveforms containing second and third separate and relatively high frequency bands, respectively C. fourth electrical waveform containing fourth relatively high frequency band intermediate said second and third frequency bands including color information relative to a third component color.
Claim 26
Dependent Claim
49 words
A system as defined in claim 15 wherein said second and third electrical waveforms containing said second and third frequency bands incorporate the component colors red and blue, respectively, and said fourth electrical waveform containing said fourth frequency band is proportionate to component colors including the component color green.
Claim 27
Dependent Claim
70 words
A system as defined in claim 16 wherein filter means are provided for separating said four frequency bands, circuit matrix means wherein said fourth electrical waveform is subtracted from said second and third waveforms, respectively, thereby to provide two color difference encoding electrical waveforms whereby said two color difference electrical waveforms and said first electrical waveform containing the said low frequency band may be processed to provide full color information.
Claim 28
Independent Claim
141 words
A method of generating electrical waveforms required for a color television receiver to reproduce a scene in color Comprising generating at least four electrical waveforms including one relatively low frequency waveform proportionate to overall luminance of a scene to be reproduced, a second waveform having a first band of high frequencies proportionate to at least one of the primary colors, a second band of high frequencies proportionate to another one of the primary colors, and a third band of high frequencies having information contained therein relative to a third one of the primary colors, combining the said three high frequency color bands in such a manner as to produce two color difference electrical waveforms whereby the said low frequency band and the two said color difference waveforms may be applied to a television receiver thereby to produce a scene in color.
Claim 29
Independent Claim
141 words
A method of generating electrical waveforms required for a color television receiver to reproduce a scene in color Comprising generating at least four electrical waveforms including one relatively low frequency waveform proportionate to overall luminance of a scene to be reproduced, a second waveform having a first band of high frequencies proportionate to at least one of the primary colors, a second band of high frequencies proportionate to another one of the primary colors, and a third band of high frequencies having information contained therein relative to a third one of the primary colors, combining the said three high frequency color bands in such a manner as to produce two color difference electrical waveforms whereby the said low frequency band and the two said color difference waveforms may be applied to a television receiver thereby to produce a scene in color.
Claim 30
Independent Claim
138 words
A method of generating electrical signals for color television receiver to reproduce a scene in color comprising generating at least four electrical waveforms including one relatively low frequency waveform proportionate to overall luminance of a scene to be reproduced, a second waveform having a first band of high frequencies proportionate to the primary component color red, a second band of high frequencies proportionate to the color component blue, and a third band of high frequencies intermediate said first and second band of high frequencies including therein information relative to the color component green, subtracting said third band of high frequency from said first band of high frequency thereby to produce a color difference electrical waveform subtracting said third band of high frequency from said second band of high frequencies thereby to produce a second color difference electrical waveform.
Claim 31
Independent Claim
138 words
A method of generating electrical signals for color television receiver to reproduce a scene in color comprising generating at least four electrical waveforms including one relatively low frequency waveform proportionate to overall luminance of a scene to be reproduced, a second waveform having a first band of high frequencies proportionate to the primary component color red, a second band of high frequencies proportionate to the color component blue, and a third band of high frequencies intermediate said first and second band of high frequencies including therein information relative to the color component green, subtracting said third band of high frequency from said first band of high frequency thereby to produce a color difference electrical waveform subtracting said third band of high frequency from said second band of high frequencies thereby to produce a second color difference electrical waveform.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |