US3636244A
Expired / Lapsed
US
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Sequential dot interlaced color television system
Assignee: TDK Micronas GmbH
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Filing: 1969-02-03
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Granted: 1972-01-18
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Expires: 1989-02-03
Abstract
Abstract A sequential dot interlaced color television system having a color television camera with a plurality of output circuits respectively providing luminance and chrominance signals. A plurality of trains of recurrent sampling signals are generated equal in number to the number of camera output circuits, and a plurality of sampling gates are provided which couple each of the camera output circuits to a transmission facility in response to a different one of the trains of sampling signals so as to pass a train of sampled video signals from the respective output circuit to the transmission facility, the trains of sampling signals being respectively phase-displaced so that the sampled video signals are multiplexed in the transmission facility. A color television display tube is provided having a plurality of video signal input circuits equal in number to the camera output circuits for respectively receiving luminance and chrominance signals. Another plurality of trains of recurrent sampling signals are generated equal in number to the sampling signal trains generated at the transmitting station and respectively having the same frequencies and phase displacement, and another plurality of sampling gates are provided for coupling each of the display tube video signal input circuits to the transmission facility in response to a different one of the second trains of sampling signals thereby passing to the video signal input circuits trains of sampled video signals respectively corresponding to those passed by the sampling gates at the transmitting station. Thus, the color information-conveying signals provided by the camera tube are converted into sequential dot format and then multiplexed for application to the transmission facility. At the receiver, the multiplexed chain of information-conveying pulses is demultiplexed and routed to the respective guns of the display tube.
Inventors
- 👤 Edward S Smierciak
- 👤 Thomas R Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:13
CPC Classifications
H; H04; H04N; H04N11/00; H04N11/06; H04N11/20; H04N11/22
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
189 words
A sequential dot interlaced raster-type color television transmission system comprising: means including a color television camera having line and frame sweep signal input circuits and a plurality of signal output circuits for respectively providing time-based video signals responsive to different color components of an input optical image; line and frame synchronizing signal sources respectively coupled to said line and frame sweep signal input circuits; means for transmission of video signals; means controlled by said line synchronizing signal for generating a plurality of trains of recurrent sampling signal pulses for respective said output circuits; counting means providing each of said plurality of trains of sampling signal pulses with a corresponding train having a smaller number of pulses in a predetermined ratio; a plurality of gating means for combining each of said trains of smaller pulse numbers and respective said output circuit video signals and for phase displacing respective said trains of smaller pulse numbers and combined video signals; and means for coupling said combined phase-displaced video signal pulse trains and said line and frame synchronizing signals to said transmission means whereby sampled video signals are multiplexed in said transmission means.
Claim 2
Dependent Claim
189 words
A sequential dot interlaced raster-type color television transmission system comprising: means including a color television camera having line and frame sweep signal input circuits and a plurality of signal output circuits for respectively providing time-based video signals responsive to different color components of an input optical image; line and frame synchronizing signal sources respectively coupled to said line and frame sweep signal input circuits; means for transmission of video signals; means controlled by said line synchronizing signal for generating a plurality of trains of recurrent sampling signal pulses for respective said output circuits; counting means providing each of said plurality of trains of sampling signal pulses with a corresponding train having a smaller number of pulses in a predetermined ratio; a plurality of gating means for combining each of said trains of smaller pulse numbers and respective said output circuit video signals and for phase displacing respective said trains of smaller pulse numbers and combined video signals; and means for coupling said combined phase-displaced video signal pulse trains and said line and frame synchronizing signals to said transmission means whereby sampled video signals are multiplexed in said transmission means.
Claim 3
Dependent Claim
76 words
The system of claim 1 wherein at least one of said sampling signal trains has a frequency fe fv(LD/n1n2) where fv is the frequency of said frame synchronizing signals, L is the number of lines in one frame, D is a predetermined number of picture elements in one line, n1 is the vertical interlace ratio, and n2 is a predetermined dot interlace ratio, the quotient LD/n1n2 being irreducible, there being no more output circuits than n2.
Claim 4
Dependent Claim
83 words
The system of claim 2 further comprising a source of recurrent timing signals having a frequency fc fen2, said generating means being coupled to said timing signal source and actuated thereby, fc being such that there are D timing signals provided during one line, fc being an integral multiple of the frequencies of each of said trains of sampling signals, and said generating means including means for phase displacing said trains of sampling signals by an integral multiple of the period of fc.
Claim 5
Dependent Claim
24 words
The system of claim 3 wherein each of said trains of timing signals has a frequency fe fv(LD/n1n2) with the quotient LD/n1n2 being irreducible.
Claim 6
Dependent Claim
50 words
The system of claim 2 wherein one of said output circuits provides a luminance video signal, the other of said output circuits respectively providing video signals responsive to different colors, said coupling means coupling said one output circuit to said transmission means in response to said one timing signal train.
Claim 7
Dependent Claim
56 words
The system Of claim 1 further comprising means in each of said output circuits with the exception of one for respectively delaying the video signals therein by times corresponding to the phase displacement of the respective timing signal trains with respect to the timing signal train which couples said one output circuit to said transmission means.
Claim 8
Dependent Claim
41 words
The system of claim 5 further comprising means in each of said other output circuits for respectively delaying the video signals therein by times corresponding to the phase displacement of the respective timing signal trains with respect to said one train.
Claim 9
Dependent Claim
25 words
The system of claim 7 wherein there are three of said other output circuits respectively providing video signals responsive to red, green and blue colors.
Claim 10
Dependent Claim
19 words
The system of claim 7 wherein there are two of said other output circuits respectively providing chrominance video signals.
Claim 11
Dependent Claim
39 words
The system of claim 7 wherein the frequency of said one timing signal train is an integral multiple greater than one of the frequencies of the other timing signal trains, said other timing signal trains having the same frequency.
Claim 12
Dependent Claim
67 words
The system of claim 1 wherein said gating means includes a plurality of selectively actuable sampling gates respectively coupled to said output circuits, each of said sampling gates having a gating signal input circuit, means for respectively applying said trains of sampling signals to said sampling gate input circuits, and means coupling said sampling gates to said transmission means for summing the sampled video signals passed thereby.
Claim 13
Dependent Claim
254 words
The system of claim 1 further comprising means for displaying a color television image including second line and frame sweep signal input circuits and a plurality of video signal input circuits equal in number to said output circuits, means for receiving said combined phase-displaced video signal pulses from said transmission means, second line and frame synchronizing signal sources coupled to said second line and frame sweep signal input circuits, means for synchronizing said second synchronizing signal sources with said first-named synchronizing signal sources; second means controlled by said second line synchronizing signal for generating a second plurality of trains of recurrent sampling signal pulses equal in number to said first-named sampling signal trains and respectively having the same frequencies, second counting means providing each of said second plurality of trains of sampling signal pulses with a corresponding train having a smaller number of pulses in said predetermined ratio, a second plurality of gating means for combining each of said second trains of smaller pulse numbers with said phase-displaced video signal pulses from said transmission means, means for phase displacing respective said second smaller pulse trains an amount equal and opposite to respective phase displacements of said video signal pulses from said transmission means; and means for coupling respective phase-displaced second smaller pulse trains and video signal pulses from said transmission means to each of said display means video signal input circuits thereby passing to said video signal input circuits trains of sampled video signals respectively corresponding to those passed by said first-named coupling means.
Claim 14
Dependent Claim
77 words
The system of claim 12 wherein at least one of said first-named sampling signal trains has a frequency fe fv(LD/n1n2) where fv is the frequency of said frame synchronizing signals, L is the number of lines in one frame, D is a predetermined number of picture elements in one line, n1 is the vertical interlace ratio, and n2 is a predetermined dot interlace ratio, the quotient LD/n1n2 being irreducible, there being no more output circuits than n2.
Claim 15
Dependent Claim
128 words
The system of claim 13 further comprising a first source of recurrent timing signals having a frequency fc fen2, said first-named generating means being coupled to said first timing signal source and actuated thereby, fc being such that there are D timing signals provided during one line, fc being an integral multiple of the frequencies of each of said first-named trains of sampling signals, said first-named generating means including means for phase displacing said first-named trains of sampling signals by an integral multiple of the period of fc, a second source of recurrent timing signals having a frequency fc, said second generating means being coupled to said second timing signal source and actuated thereby and including means for providing said phase displacement of said second timing signal trains.
Claim 16
Dependent Claim
30 words
The system of claim 14 whereby said second timing signal source is coupled to said second synchronizing signal source and thereby maintained in synchronism with said first timing signal source.
Claim 17
Dependent Claim
96 words
The system of claim 12 further comprising means in each of said output circuits with the exception of one for respectively delaying the video signals therein by times corresponding to the phase displacement of the respective first-named timing signal trains with respect to the timing signal train which couples said one output circuit to said transmission means, and means in each of said video signal input circuits with the exception of one for respectively delaying the signals therein by times such that corresponding video signals in each of said video signal input circuits are in phase.
Claim 18
Dependent Claim
81 words
The system of claim 13 wherein one of said output circuits provides a luminance video signal, the other of said output circuits respectively providing video signals responsive to different colors, said first-named coupling means coupling said one output circuit to said transmission means in response to said one of said first-named signal trains, one of said video signal input circuits being for luminance video signals and the other of said video signal input circuits being for said different color video signals.
Claim 19
Dependent Claim
93 words
The system of claim 17 further comprising means in each of said other output circuits for respectively delaying the video signals therein by times corresponding to the phase displacement of the respective first-named timing signal trains with respect to said one first-named signal trains, and means in said one video signal input circuit and in each of said other video signal input circuits with the exception of one for respectively delaying the signals therein by times such that the corresponding video signals in each of said video signal input circuits are in phase.
Claim 20
Dependent Claim
20 words
The system of claim 17 further comprising a low band-pass filter in each of said other video signal input circuits.
Claim 21
Dependent Claim
20 words
The system of claim 18 further comprising a low band-pass filter in each of said other video signal input circuits.
Claim 22
Dependent Claim
64 words
The system of claim 3 further comprising means for actuating said timing signal source thereby to initiate a train of timing signals in response to each said line synchronizing signal, and means for terminating each said timing signal train in response to D n2 timing signals, fc being such that each interval between successive line synchronizing signals is longer than D n2 timing signals.
Claim 23
Dependent Claim
115 words
The system of claim 14 further comprising means coupling said first-named line synchronizing signal source to said first timing signal source for initiating a train of said first-named timing signals in response to each said first-named line synchronizing signal, means for terminating each said train of first-named timing signals in response to D n2 timing signals, fc being such that each interval between successive line synchronizing signals is longer than D n2 timing signals, means coupling said second line synchronizing signal source to said second timing signal source for initiating a train of said second timing signals, and means for terminating each said train of second timing signals in response to D second timing signals.
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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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |