Patent US3683111A successfully refreshed from Google Patents.
US3683111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television bandwidth compression and expansion system
Assignee: COLORADO VIDEO Inc
•
Filing: 1969-06-18
•
Granted: 1972-08-08
•
Expires: 1989-06-18
Abstract
Abstract A television scan converter system converting a television signal to a narrow bandwidth by high order sampling techniques which may scramble the signals, and then converting the narrow bandwidth television signals to hard copy or a standard television signal. The system may include color transmission and utilizes components which may include a rotating magnetic disc memory, counters, and gating techniques in some embodiments with techniques allowing easy detection of moving objects in surveillance television.
Inventors
- 👤 Glen R Southworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:25
CPC Classifications
H; H04; H04N; H04N11/00; H04N11/06; H04N11/20; H04N11/22; H04N7/00; H04N7/12; H04N7/122; H04N7/125
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
161 words
A system for transmitting television signals for viewing subjects in motion relative to the camera comprising transmitting converter means to reduce a wide band television signal to a narrow band television signal, receiving converter means to detect relative motion and convert said narrow band television signal to a video signal applicable to a cathode ray tube, linking means carrying said narrow band television signal between said transmitting converter means and said receiving converter means, said receiving converter means including video memory means having two channels for receiving, recording and transmitting successive frames of video signals, switching means to successively connect each of said two channels to said linking means, signal inverting means connected to one of said two channel outputs, and signal combining means to cancel similar signals received from successive frames and pass difference signals to a receiver means, connected between the outputs of said inverting means, the other of said channel outputs, and the input of said receiver means.
Claim 2
Independent Claim
161 words
A system for transmitting television signals for viewing subjects in motion relative to the camera comprising transmitting converter means to reduce a wide band television signal to a narrow band television signal, receiving converter means to detect relative motion and convert said narrow band television signal to a video signal applicable to a cathode ray tube, linking means carrying said narrow band television signal between said transmitting converter means and said receiving converter means, said receiving converter means including video memory means having two channels for receiving, recording and transmitting successive frames of video signals, switching means to successively connect each of said two channels to said linking means, signal inverting means connected to one of said two channel outputs, and signal combining means to cancel similar signals received from successive frames and pass difference signals to a receiver means, connected between the outputs of said inverting means, the other of said channel outputs, and the input of said receiver means.
Claim 3
Dependent Claim
37 words
The system in accordance with claim 1, further characterized by said receiver means including a threshold detection circuit means connected to said signal combining means to detect a discrepancy between successive recorded images from said two channels.
Claim 4
Dependent Claim
57 words
The system in accordance with claim 1, further characterized by said transmitting converter means including means to generate a series of sampling pulses, means for deleting certain ones of said sampling pulses, and means to sample and hold the wide band television signal in response to the remaining said sampling pulses to produce a series of samples.
Claim 5
Dependent Claim
38 words
The system in accordance with claim 3, further characterized by said linking means being a conventional telephone line, and said deleting means and sampling means producing the narrow band television signal of bandwidth acceptable to said linking means.
Claim 6
Dependent Claim
83 words
The system in accordance with claim 3, further characterized by said sampling means including sample pulse generating means actuated by a driving pulse synchronizing means synchronized with the wide band televisioN signal, and said deleting means including counter means also actuated by said driving pulse means, and gating means connected with said sampling means and also connected to receive pulses from said sample pulse generating means and said counter means to delete selected numbers of pulses received from said sample pulse generating means.
Claim 7
Dependent Claim
20 words
The system in accordance with claim 5, further characterized by said sample pulse generating means being a sliding pulse generator.
Claim 8
Dependent Claim
20 words
The system in accordance with claim 5, further characterized by said sample pulse generating means being a fixed pulse generator.
Claim 9
Dependent Claim
96 words
The system in accordance with claim 3, further characterized by said sampling means including synchronizing pulse separator means to recover horizontal and vertical drive pulses from said wide band television signal, sample pulse generating means actuated by a drive pulse from said synchronizing pulse separator means; said deletion means including counter means actuated by both horizontal and vertical drive pulses from said synchronizing pulse separator means, and gating means connected to receive pulses from said sample pulse generating means and said counter means to delete predetermined numbers of pulses received from said sample pulse generating means.
Claim 10
Dependent Claim
124 words
The system in accordance with claim 1, further characterized by said transmitting converter means including synchronizing pulse separator means to recover horizontal and vertical drive pulses from said wide band television signal, keying and clamping means also connected to receive said wide band television signals, fixed sample pulse generating means actuated by one kind of said drive pulses from said synchronizing pulse separator means, sample and hold circuit means connected to receive the output from said fixed sample pulse generating means, multivibrator means connected to receive the other kind of said drive pulses from said synchronizing pulse separator means, and mixing means to receive a keyed and clamped video signal through said sample and hold circuit means to produce a narrow band television signal.
Claim 11
Dependent Claim
69 words
The system in accordance with claim 1, further characterized by said transmitter converter means including means for generating a row of information sample pulses in fixed relation to the television signal horizontal timing rate, a fixed pulse generating means, means for deleting certain ones of said fixed pulses, and means responsive to the remaining fixed pulses for sampling said wide band television signal to produce said information sample pulses.
Claim 12
Dependent Claim
40 words
A system in accordance with claim 10, further characterized by said deleting means including gating means and counting means connected to receive pulses from said pulse generating means to delete selected number of pulses received from said pulse generating means.
Claim 13
Independent Claim
124 words
A method for transmitting television signals for viewing subjects in motion relative to the camera comprising the steps of generating a row of sampling pulses by taking one sample from each television line, deleting a predetermined number of the sampling pulses thereby further compressing the bandwidth of the television signal, transmitting the remaining sampling pulses which have not been deleted in the form of a narrow band television signal to a remote receiver, and restoring said narrow band television signal to a signal applicable to a cathode ray tube, and restoring step including switching succeeding frames of said narrow band television signal into different channels, cancelling comparing a pair of separated frames from said different channels, and detecting discrepancies in said pair of frames.
Claim 14
Independent Claim
124 words
A method for transmitting television signals for viewing subjects in motion relative to the camera comprising the steps of generating a row of sampling pulses by taking one sample from each television line, deleting a predetermined number of the sampling pulses thereby further compressing the bandwidth of the television signal, transmitting the remaining sampling pulses which have not been deleted in the form of a narrow band television signal to a remote receiver, and restoring said narrow band television signal to a signal applicable to a cathode ray tube, and restoring step including switching succeeding frames of said narrow band television signal into different channels, cancelling comparing a pair of separated frames from said different channels, and detecting discrepancies in said pair of frames.
Claim 15
Independent Claim
115 words
A method of transmitting television signals for viewing subjects in motion relative to the camera comprising the steps of generating sampling pulses, deleting a predetermined number oF said sampling pulses, sampling a wide band television signal utilizing the remaining ones of said sampling pulses, holding the amplitude levels of the samples used and transmitting them in the form of a narrow band television signal to a remote receiver location, and restoring said narrow band television signal to a signal applicable to a cathode ray tube, said restoring step including separating succeeding frames of said narrow band television signal, cancelling similar signals in a pair of separated frames, and detecting discrepancies in said pair of frames.
Claim 16
Independent Claim
115 words
A method of transmitting television signals for viewing subjects in motion relative to the camera comprising the steps of generating sampling pulses, deleting a predetermined number oF said sampling pulses, sampling a wide band television signal utilizing the remaining ones of said sampling pulses, holding the amplitude levels of the samples used and transmitting them in the form of a narrow band television signal to a remote receiver location, and restoring said narrow band television signal to a signal applicable to a cathode ray tube, said restoring step including separating succeeding frames of said narrow band television signal, cancelling similar signals in a pair of separated frames, and detecting discrepancies in said pair of frames.
References Cited (Backward Citations)
US2681946A
Cited
US2657255A
Cited
US2736762A
Cited
US2955159A
Cited
GB997946A
Cited
US3114797A
Cited
US3284567A
Cited
US3524012A
Cited
US3470313A
Cited
US3499980A
Cited
US3531588A
Cited
US3507992A
Cited
US3526900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |