US3851095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communication system for transmitting video information through media of restricted bandwidth
Assignee: TELESCAN COMMUNICATIONS SYST I
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Filing: 1972-08-07
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Granted: 1974-11-26
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Expires: 1992-08-07
Abstract
Abstract A communication system for transmitting video information through media of restricted bandwidth. A camera, such as a standard TV fast scan camera can be used to convert an optical image to an electrical image. The output signal from the camera is fed to an amplifier which passes electrical information for one complete frame of a picture which is to be transmitted. The output of the amplifier is then received by a vidicon type storage tube and transmitted through narrow bandwidth transmission lines using slow scan TV techniques. The slow scan signal is received at a remote location and again stored on a Vidicon type storage tube. The slow scan image is then converted to a fast scan signal which is repetitiously displayed on a standard TV receiver.
Inventors
- 👤 B Kleinerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:22
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/12; H04N7/122
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
233 words
A communication system for transmitting video images from a first location to a second location via a transmission line comprising: A. means for converting a visual image to a series of frames of electrical signals at a fast TV scan rate at the first location; B. means coupled to said converting means for storing only the signal of a single such frame; C. means for converting said single frame stored electrical signal to a slow scan TV signal of the single frame; D. means for receiving said single frame slow scanned TV signal at the second location via the transmission line, said receiving means including; i. limiter means for eliminating AM signals from the received signal, ii. means for providing FM demodulation of said signal coupled to the output of said limiter, iii. a bandpass filter coupled to the output of said limiter, iv. a sync separator coupled to the output of said bandpass filter, and v. means for generating vertical and horizontal sync pulses coupled to the output of said sync separator; E. means for storing said single frame received slow scan signal; F. means for converting the stored single frame received slow scan signal to repetitious signals of said single frame at a fast TV scan rate; and G. means for converting the repetitious fast scan TV signals of said single frame to an optical image corresponding to the visual image.
Claim 2
Dependent Claim
233 words
A communication system for transmitting video images from a first location to a second location via a transmission line comprising: A. means for converting a visual image to a series of frames of electrical signals at a fast TV scan rate at the first location; B. means coupled to said converting means for storing only the signal of a single such frame; C. means for converting said single frame stored electrical signal to a slow scan TV signal of the single frame; D. means for receiving said single frame slow scanned TV signal at the second location via the transmission line, said receiving means including; i. limiter means for eliminating AM signals from the received signal, ii. means for providing FM demodulation of said signal coupled to the output of said limiter, iii. a bandpass filter coupled to the output of said limiter, iv. a sync separator coupled to the output of said bandpass filter, and v. means for generating vertical and horizontal sync pulses coupled to the output of said sync separator; E. means for storing said single frame received slow scan signal; F. means for converting the stored single frame received slow scan signal to repetitious signals of said single frame at a fast TV scan rate; and G. means for converting the repetitious fast scan TV signals of said single frame to an optical image corresponding to the visual image.
Claim 3
Dependent Claim
44 words
A communication system according to claim 1 wherein said received storing means includes: another storage tube, said other tube having a storage screen for receiving the slow scanned electrical image, said other storage tube being coupled to the output of said FM demodulating means.
Claim 4
Dependent Claim
53 words
A communication system according to claim 2 wherein said other storage tube further includes horizontal and vertical deflection means synchronized to the horizontal and vertical pulses from said sync separator whereby said horizontal and vertical deflection means establishes said slow scan electrical image on the storage screen at the slow scan frequency rate.
Claim 5
Dependent Claim
36 words
A communication system according to claim 3 wherein said stored slow scan converting means includes horizontal and vertical deflection means for scanning said received stored slow scan image at the same scanning rate as said camera.
Claim 6
Dependent Claim
30 words
A communication system according to claim 4 wherein said stored slow scan converting means further includes a TV receiver for converting the stored received image to the original visual image.
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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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |