US3705263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scan converter multiplexing system
Assignee: International Business Machines Corp
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Filing: 1971-06-30
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Granted: 1972-12-05
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Expires: 1991-06-30
Abstract
Abstract In the disclosed system, the storage screen of a scan converter or a recording storage tube is divided into a plurality of image areas such as four quadrants, for example. In each of these quadrants, there are written on the screen respective different images which are destined for four terminals. The storage screen is then read by having the reading beam therein sweep the total width of the storage screen in a raster scan. A spatial multiplexing arrangement is provided to transmit to each of the terminals the respective images to be received thereby. In this system, therefore, there is enabled the efficient use of a recording storage tube since its employment can be shared by a plurality of terminals. In an embodiment of the invention, the sync signals for the reading beam in the recording storage tube and those for the terminals can be so arranged whereby two raster lines are provided for each terminal for one raster line in the recording storage tube. Where a non-interlaced scan is employed in the terminals, then two fields are utilized per frame. However, where an interlaced scan is provided in the terminals, then four fields are utilized per frame.
Inventors
- 👤 Larry E Rittenhouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:21
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/01; H04N7/0105; H04N7/08; H04N7/0806
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
273 words
A system for effecting the sharing of a recording storage tube means among a plurality of raster-scanned terminals wherein such recording storage tube means includes a raster scannable storage screen, electron beam deflection means for writing video information on said storage screen, and electron beam deflection means for reading the written video information from said storage screen comprising: means adapted to be connected to said recording storage tube means for providing a chosen plurality of video images to be written respectively on said chosen plurality of discrete image areas on said screen; means for generating a first signal which is a composite of horizontal and vertical sync signals for said recording storage tube reading electron beam deflection means; means for generating a second signal in synchronism with said first signal which is a composite of horizontal and vertical sync signals for said terminals; means for applying said first signal to said recording storage tube to cause video images stored on said storage screen to be read therefrom; means for generating a chosen plurality of gate signals in synchronism with said first and second signals, each of said gate signals being associated with a discrete one of said terminals; sync and video mixer means; means for applying to said sync and video mixer means, said read video images, said second signal and said gate signals to combine said gate signals with said video images and said second signal; and means for applying the output of said sync and video mixer means to said terminals whereby said gate signals effect the providing to each of said terminals the one of said images respectively destined therefor.
Claim 2
Independent Claim
273 words
A system for effecting the sharing of a recording storage tube means among a plurality of raster-scanned terminals wherein such recording storage tube means includes a raster scannable storage screen, electron beam deflection means for writing video information on said storage screen, and electron beam deflection means for reading the written video information from said storage screen comprising: means adapted to be connected to said recording storage tube means for providing a chosen plurality of video images to be written respectively on said chosen plurality of discrete image areas on said screen; means for generating a first signal which is a composite of horizontal and vertical sync signals for said recording storage tube reading electron beam deflection means; means for generating a second signal in synchronism with said first signal which is a composite of horizontal and vertical sync signals for said terminals; means for applying said first signal to said recording storage tube to cause video images stored on said storage screen to be read therefrom; means for generating a chosen plurality of gate signals in synchronism with said first and second signals, each of said gate signals being associated with a discrete one of said terminals; sync and video mixer means; means for applying to said sync and video mixer means, said read video images, said second signal and said gate signals to combine said gate signals with said video images and said second signal; and means for applying the output of said sync and video mixer means to said terminals whereby said gate signals effect the providing to each of said terminals the one of said images respectively destined therefor.
Claim 3
Independent Claim
301 words
A system for effecting the sharing of a recording storage tube means among a plurality of raster-scanned terminals wherein said recording storage tube means includes a raster scannable storage screen, electron beam deflection means for writing video information on said storage screen, and electron beam deflection means for reading written video information from said storage screen comprising: means adapted to be connected to said recording storage tube means for providing a chosen plurality of video images to be written respectively, on said chosen plurality of discrete image areas on said storage screen; means for generating a first signal which is a composite of horizontal and vertical sync signals for said recording storage tube reading electron beam deflection means; means for generating a second signal in synchronism with said first signal which is a composite of horizontal and vertical sync signals for said terminals; means for applying said first signal to said recording storage tube to cause the video images on said storage screen to be read therefrom; means for generating a chosen plurality of gate signals in synchronism with said first and second signals, each of said gate signals being associated with a discrete one of said terminals; a plurality of sync and video mixers, each of said sync and video mixers being associated with a particular one of said terminals; means for applying to each of said sync and video mixers, said read video signal, said second signal, and the one of said gate signals associated in common with a particular sync and video mixer with the same terminal; and means for applying the outputs of each of said sync and vIdeo mixers to the terminals respectively associated therewith, whereby the video images written on the image areas of said storage screen are respectively provided to each of said terminals.
Claim 4
Independent Claim
301 words
A system for effecting the sharing of a recording storage tube means among a plurality of raster-scanned terminals wherein said recording storage tube means includes a raster scannable storage screen, electron beam deflection means for writing video information on said storage screen, and electron beam deflection means for reading written video information from said storage screen comprising: means adapted to be connected to said recording storage tube means for providing a chosen plurality of video images to be written respectively, on said chosen plurality of discrete image areas on said storage screen; means for generating a first signal which is a composite of horizontal and vertical sync signals for said recording storage tube reading electron beam deflection means; means for generating a second signal in synchronism with said first signal which is a composite of horizontal and vertical sync signals for said terminals; means for applying said first signal to said recording storage tube to cause the video images on said storage screen to be read therefrom; means for generating a chosen plurality of gate signals in synchronism with said first and second signals, each of said gate signals being associated with a discrete one of said terminals; a plurality of sync and video mixers, each of said sync and video mixers being associated with a particular one of said terminals; means for applying to each of said sync and video mixers, said read video signal, said second signal, and the one of said gate signals associated in common with a particular sync and video mixer with the same terminal; and means for applying the outputs of each of said sync and vIdeo mixers to the terminals respectively associated therewith, whereby the video images written on the image areas of said storage screen are respectively provided to each of said terminals.
Claim 5
Independent Claim
436 words
A system for effecting the sharing of a recording storage tube means among a plurality of raster-scanned terminals wherein said recording storage tube includes a raster scannable storage screen, means for writing video information on said storage screen and electron beam deflection means for reading the written video information from said storage screen comprising: means adapted to be connected to said recording storage tube for providing a chosen plurality of video images to be written respectively on said chosen plurality of discrete image areas on said screen: means for generating a pulse train having a frequency equal to the desired terminal line repitition rate in said system; means responsive to said pulse train generating means for generating in synchronism with said pulse train a line sync signal for said recording storage tube for reading electron beam deflection means; means for generating in synchronism with said pulse train, a line sync signal for said recording storage tube; means for generating in synchronism with said pulse train, line sync signals for said terminals; means for generating in synchronism with said pulse train, vertical sync pulses; means for combining said vertical sync signals and said line sync signal for said recording storage tube to produce a first signal in synchronism with said pulse train which is a composite of the horizontal and vertical sync signals for said recording storage tube; means for combining said line sync signal for said terminals with said vertical sync signal to produce a second signal which is a composite of the horizontal and vertical sync signals for said terminals; means for applying said first signal to said recording storage tube to cause the video images on said storage screen to be read therefrom; means responsive to the application thereto of said line sync signals for said terminals and said vertical sync pulses for generating said plurality of gate signals in synchronism with said first and second signals; each of said gate signals being associated with a discrete one of said terminals; a plurality of sync and video mixers, each of said sync and video mixers being associated with a particular one of said terminals; means for applying to each of said sync and video mixers, said read video signal, said second signal and the one of said gate signals associated in common with the particular sync and video mixer with the same terminal; and means for applying the outputs of each of said sync and video mixers to the terminals respectively associated therewith whereby the video images stored on the image areas of said storage screen are respectively provided to each of said terminals.
Claim 6
Independent Claim
436 words
A system for effecting the sharing of a recording storage tube means among a plurality of raster-scanned terminals wherein said recording storage tube includes a raster scannable storage screen, means for writing video information on said storage screen and electron beam deflection means for reading the written video information from said storage screen comprising: means adapted to be connected to said recording storage tube for providing a chosen plurality of video images to be written respectively on said chosen plurality of discrete image areas on said screen: means for generating a pulse train having a frequency equal to the desired terminal line repitition rate in said system; means responsive to said pulse train generating means for generating in synchronism with said pulse train a line sync signal for said recording storage tube for reading electron beam deflection means; means for generating in synchronism with said pulse train, a line sync signal for said recording storage tube; means for generating in synchronism with said pulse train, line sync signals for said terminals; means for generating in synchronism with said pulse train, vertical sync pulses; means for combining said vertical sync signals and said line sync signal for said recording storage tube to produce a first signal in synchronism with said pulse train which is a composite of the horizontal and vertical sync signals for said recording storage tube; means for combining said line sync signal for said terminals with said vertical sync signal to produce a second signal which is a composite of the horizontal and vertical sync signals for said terminals; means for applying said first signal to said recording storage tube to cause the video images on said storage screen to be read therefrom; means responsive to the application thereto of said line sync signals for said terminals and said vertical sync pulses for generating said plurality of gate signals in synchronism with said first and second signals; each of said gate signals being associated with a discrete one of said terminals; a plurality of sync and video mixers, each of said sync and video mixers being associated with a particular one of said terminals; means for applying to each of said sync and video mixers, said read video signal, said second signal and the one of said gate signals associated in common with the particular sync and video mixer with the same terminal; and means for applying the outputs of each of said sync and video mixers to the terminals respectively associated therewith whereby the video images stored on the image areas of said storage screen are respectively provided to each of said terminals.
Claim 7
Dependent Claim
62 words
A system as defined in claim 3 and further including means for generating vertical serration pulses for said recording storage tube which are combined in said first signal with said horizontal and vertical sync signals; and means for generating vertical serration pulses for said terminals which are combined in said second signal with said horizontal and vertical sync signals for said terminals.
Claim 8
Dependent Claim
56 words
A system as defined in claim 4 wherein the means for generating said vertical sync pulses comprises a counter which cycles at a chosen number of pulses, first chosen ones of said pulses generating vertical sync pulses for said recording storage tube, other chosen ones of the said pulses generating vertical sync pulses for said terminals.
Claim 9
Independent Claim
628 words
A system for effecting the sharing of a recording storage tube means among a plurality of raster-scanned terminals wherein said recording storage tube means includes a raster scannable storage screen, means for writing video information on said storage screen, and electron beam deflection means for reading the written video inFormation from said storage screen comprising: means adapted to be connected to said recording storage tube means for providing a plurality of video images to be written respectively on said plurality of discrete image areas on said screen; first pulse generating means for generating a pulse train having a frequency equal to the line repetition rate of said terminals; second pulse generating means responsive to the output of said first pulse generating means for generating a pulse train having a frequency equal to one-half the frequency of said first pulse train; means responsive to the output of the said first pulse generating means for generating in synchronism with said first train, vertical serration pulses for said terminals; means responsive to the output of said second pulse generating means for generating in synchronism with said second pulse train, vertical serration pulses for said recording storage tube deflection means; means responsive to the output of said recording storage tube vertical serration pulse generating means for producing in synchronism with said second pulse train, line sync signals for said recording storage tube; a counter which cycles at a chosen number responsive to the output of said line sync pulse generating means for said recording storage tube for producing said chosen number of pulses in each of its cycles in synchronism with said second pulse train; means responsive to the output of said vertical serration pulse generating means for said terminals for generating in synchronism with said first pulse train line sync signals for said terminals; means responsive to the application thereto of the outputs of said vertical serration pulse generating means for said recording storage tube and line sync signal generating means for said recording storage tube and chosen pulses of said counter for producing a first signal which is a composite of said vertical serration pulses for said recording storage tube, the line sync pulses for the recording storage tube and said counter pulses, said last named pulses generating vertical sync pulses for said recording storage tube; means for applying said first signal to said recording storage tube to cause the video images on said storage screen to be read therefrom; means responsive to the application thereto of the output of said vertical serration pulse generating means for said terminals, said line sync signals generating means for said terminals, said chosen pulses from said counter and said other chosen pulses from said counter, said pulses from said counter generating vertical sync pulses for said terminals, for generating a second signal which is a composite of the vertical serration pulses for said terminals, the line sync signals for said terminals and the vertical sync pulses for said terminals; gate generating means for generating a plurality of gate signals in synchronism with said first pulse train, each of said gate signals being associated with a discrete one of said terminals; a plurality of sync and video mixers, each of said sync and video mixers being associated with a particular one of said terminals; means for applying to each of said sync and video mixers, said read video signals, said second signal, and the one of said gate signals associated in common with the particular sync and video mixer with the same terminal; and means for applying the outputs for each of said sync and video mixers to the terminals respectively associated therewith, whereby the video images written on the image areas of said storage screen are respectively provided to each of said terminals.
Claim 10
Independent Claim
628 words
A system for effecting the sharing of a recording storage tube means among a plurality of raster-scanned terminals wherein said recording storage tube means includes a raster scannable storage screen, means for writing video information on said storage screen, and electron beam deflection means for reading the written video inFormation from said storage screen comprising: means adapted to be connected to said recording storage tube means for providing a plurality of video images to be written respectively on said plurality of discrete image areas on said screen; first pulse generating means for generating a pulse train having a frequency equal to the line repetition rate of said terminals; second pulse generating means responsive to the output of said first pulse generating means for generating a pulse train having a frequency equal to one-half the frequency of said first pulse train; means responsive to the output of the said first pulse generating means for generating in synchronism with said first train, vertical serration pulses for said terminals; means responsive to the output of said second pulse generating means for generating in synchronism with said second pulse train, vertical serration pulses for said recording storage tube deflection means; means responsive to the output of said recording storage tube vertical serration pulse generating means for producing in synchronism with said second pulse train, line sync signals for said recording storage tube; a counter which cycles at a chosen number responsive to the output of said line sync pulse generating means for said recording storage tube for producing said chosen number of pulses in each of its cycles in synchronism with said second pulse train; means responsive to the output of said vertical serration pulse generating means for said terminals for generating in synchronism with said first pulse train line sync signals for said terminals; means responsive to the application thereto of the outputs of said vertical serration pulse generating means for said recording storage tube and line sync signal generating means for said recording storage tube and chosen pulses of said counter for producing a first signal which is a composite of said vertical serration pulses for said recording storage tube, the line sync pulses for the recording storage tube and said counter pulses, said last named pulses generating vertical sync pulses for said recording storage tube; means for applying said first signal to said recording storage tube to cause the video images on said storage screen to be read therefrom; means responsive to the application thereto of the output of said vertical serration pulse generating means for said terminals, said line sync signals generating means for said terminals, said chosen pulses from said counter and said other chosen pulses from said counter, said pulses from said counter generating vertical sync pulses for said terminals, for generating a second signal which is a composite of the vertical serration pulses for said terminals, the line sync signals for said terminals and the vertical sync pulses for said terminals; gate generating means for generating a plurality of gate signals in synchronism with said first pulse train, each of said gate signals being associated with a discrete one of said terminals; a plurality of sync and video mixers, each of said sync and video mixers being associated with a particular one of said terminals; means for applying to each of said sync and video mixers, said read video signals, said second signal, and the one of said gate signals associated in common with the particular sync and video mixer with the same terminal; and means for applying the outputs for each of said sync and video mixers to the terminals respectively associated therewith, whereby the video images written on the image areas of said storage screen are respectively provided to each of said terminals.
References Cited (Backward Citations)
US3179745A
Cited
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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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |