Patent US4354613A successfully refreshed from Google Patents.
Patent US3792196A successfully refreshed from Google Patents.
US3792196A
Expired / Lapsed
US
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Picture transmission system
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1972-06-23
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Granted: 1974-02-12
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Expires: 1992-06-23
Abstract
Abstract A television system in which, at both the transmitting end and the receiving end, the picture is scanned by an undulating scanning beam which during each horizontal scanning period scans picture elements lying in a plurality of adjacent rows, the undulating beam tracing a path which alternates between the rows.
Inventors
- 👤 B Wendland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:22
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/30; H04N3/34
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
167 words
In a video picture transmission system utilizing interlaced scanning of a picture frame including a transmitter in which the brightness information is transmitted for an image whose elements are located in a series of parallel rows, and a receiver, the improvement comprising: means at the transmitter for scanning the image along a series of scanning lines each following an undulating path so as to scan a portion of the image elements lying in each of four adjacent rows with the paths of adjacent scanning lines being interlaced and the image elements associated with each scanning line being disposed at the points of change of direction of the undulating path, said means causing the number of image elements scanned per line to be greater than the number of scanning lines used for the transmission of a picture frame; and means at the receiver for reproducing the scanned image in synchronism with, and with the same scanning paths as, the picture scanning produced by said means at the transmitter.
Claim 2
Dependent Claim
167 words
In a video picture transmission system utilizing interlaced scanning of a picture frame including a transmitter in which the brightness information is transmitted for an image whose elements are located in a series of parallel rows, and a receiver, the improvement comprising: means at the transmitter for scanning the image along a series of scanning lines each following an undulating path so as to scan a portion of the image elements lying in each of four adjacent rows with the paths of adjacent scanning lines being interlaced and the image elements associated with each scanning line being disposed at the points of change of direction of the undulating path, said means causing the number of image elements scanned per line to be greater than the number of scanning lines used for the transmission of a picture frame; and means at the receiver for reproducing the scanned image in synchronism with, and with the same scanning paths as, the picture scanning produced by said means at the transmitter.
Claim 3
Dependent Claim
43 words
An arrangement as defined in claim 1 wherein said means at the transmitter produce an approximately rectangular picture to be transmitted and cause the number of image elements per scanning line to be approximately four times the number of scanning lines per frame.
Claim 4
Dependent Claim
24 words
An arrangement as defined in claim 1 wherein said means at the transmitter cause each of the scanning lines to have a stair shape.
Claim 5
Dependent Claim
40 words
An arrangement as defined in claim 3 wherein said means at the transmitter form the scanning lines by a staircase generator generating four equidistant steps wherein the amplitude of a step is about four times the width of the step.
Claim 6
Dependent Claim
116 words
An arrangement as defined in claim 3 wherein the transmitter includes a camera tube having horizontal and vertical deflection means and producing horizontal scanning lines and said means at the transmitter comprises: an additional vertical deflection coil; an oscillator; a staircase generator and a digital-analog converter connected between said oscillator and the additional vertical deflection coil, the frequency of the output of said oscillator being approximately sixteen times the upper limit frequency of the video signal in a conventional television system; further frequency dividers connected to the output of the frequency divider 16 of the said staircase generator for deriving from its output the horizontal and vertical synchronizing sigNals for the deflection units of the camera.
Claim 7
Dependent Claim
48 words
An arrangement as defined in claim 3 wherein said means at the receiver comprise a vertical deflection coil; a phase locked loop circuit synchronized by the video signal received at the receiver; and a staircase generator connected between said loop circuit and said coil for feeding said coil.
Claim 8
Dependent Claim
24 words
An arrangement as defined in claim 1 wherein said means at the transmitter cause each of the scanning lines to have a meander shape.
Claim 9
Dependent Claim
115 words
An arrangement as defined in claim 7 wherein the transmitter includes a camera tube having horizontal and vertical deflection means and producing horizontal scanning lines and said means at the transmitter comprises: an additional vertical deflection coil; a summing member whose output is connected to feed said coil; an oscillator; a voltage divider and a frequency divider connected between said oscillator and said summing member, the frequency of the output of said oscillator being approximately four times the upper limit frequency of the video signal in a conventional television system; further frequency dividers connected to said oscillator for deriving from its output the horizontal and vertical synchronizing signals for the deflection units of the camera.
Claim 10
Dependent Claim
55 words
An arrangement as defined in claim 7 wherein said means at the receiver comprise a vertical deflection coil; a phase locked loop circuit synchronized by the video signal received at the receiver; and a frequency divider, a voltage divider, and a summing circuit connected between said loop circuit and said coil for feeding said coil.
Claim 11
Dependent Claim
51 words
An arrangement as defined in claim 7 wherein said means at the transmitter form the scanning lines by superimposing two sinusoidal waves whose periods have a ratio of 1 : 3, the amplitude of the wave with the longer period being greater than that of the wave with the shorter period.
Claim 12
Dependent Claim
43 words
An arrangement as defined in claim 10 wherein the peak-to-peak amplitude of the wave with the longer period equals the average distance between adjacent lines and the amplitude of the wave with the shorter period is one-half the average distance between adjacent lines.
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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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |