GB1183107A - Creación de Inventos y Patentes con Inteligencia Artificial

GB1183107A – Electronic System for Transmission of Two Tone Images
– Google Patents

GB1183107A – Electronic System for Transmission of Two Tone Images
– Google Patents
Electronic System for Transmission of Two Tone Images

Info

Publication number
GB1183107A

GB1183107A
GB36136/67A
GB3613667A
GB1183107A
GB 1183107 A
GB1183107 A
GB 1183107A
GB 36136/67 A
GB36136/67 A
GB 36136/67A
GB 3613667 A
GB3613667 A
GB 3613667A
GB 1183107 A
GB1183107 A
GB 1183107A
Authority
GB
United Kingdom
Prior art keywords
scan
image
tone
transition points
line scan
Prior art date
1966-08-06
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Expired

Application number
GB36136/67A
Inventor
Aurelio Beltrami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Individual

Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1966-08-06
Filing date
1967-08-07
Publication date
1970-03-04

1967-08-07
Application filed by Individual
filed
Critical
Individual

1970-03-04
Publication of GB1183107A
publication
Critical
patent/GB1183107A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

Classifications

H—ELECTRICITY

H04—ELECTRIC COMMUNICATION TECHNIQUE

H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION

H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof

H04N1/38—Circuits or arrangements for blanking or otherwise eliminating unwanted parts of pictures

H—ELECTRICITY

H04—ELECTRIC COMMUNICATION TECHNIQUE

H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION

H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof

H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa

H04N1/17—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa the scanning speed being dependent on content of picture

H—ELECTRICITY

H04—ELECTRIC COMMUNICATION TECHNIQUE

H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION

H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages

H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical

H04N3/30—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical otherwise than with constant velocity or otherwise than in pattern formed by unidirectional, straight, substantially horizontal or vertical lines

H04N3/32—Velocity varied in dependence upon picture information

H—ELECTRICITY

H04—ELECTRIC COMMUNICATION TECHNIQUE

H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION

H04N7/00—Television systems

H04N7/14—Systems for two-way working

H04N7/141—Systems for two-way working between two video terminals, e.g. videophone

H—ELECTRICITY

H04—ELECTRIC COMMUNICATION TECHNIQUE

H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION

H04N7/00—Television systems

H04N7/14—Systems for two-way working

H04N7/141—Systems for two-way working between two video terminals, e.g. videophone

H04N7/148—Interfacing a video terminal to a particular transmission medium, e.g. ISDN

Abstract

1,183,107. Copying telegraphy. A. BELTRAMI. 7 Aug., 1967 [6 Aug., 1966], No. 36136/67. Heading H4F. A method for transmitting a two tone image, e.g. Fig. 2a comprising tone transition points Fig. 2i separating monotonic areas over the normal telephone network, comprises scanning said image with a television type raster to produce video signals, Fig. 2b, generating a pulse, Fig. 2p, marking the end of each line scan, transmitting, Fig. 2m a single detached sinusoidal oscillation, for each of said tone transition points and for each of said generated pulses, the latter oscillations being distinguishable from the former (e.g. in antiphase) and video signals corresponding to said monotonic areas not being transmitted, wherein the exact reproduction of the image at the receiver is made possible by the scanning and reproduction of the image being carried out by means of cathoderay tubes having identical rasters with a two speed line scan, Fig. 2h, comprising low and high speed portions and with frame scans obtained by integration of the end line pulses, the low speed of the line scan being used to scan the tone transition points, and the high speed being used to scan said monotonic areas. By transmitting the tone transition points only and using a high speed scan in between said points, the time needed to scan and reproduce an image is reduced to near that required to scan its transition points only. In the two way system of Fig. 7 each subscriber is provided with a telephone, a flying spot scanner and photoelectric pick-up assembly 11 and a cathode-ray tube reproducer L1. Each telephone is provided, in conjunction with a switch H, with means whereby an image is transmitted to the other subscriber (position T) or is received therefrom (position R) or only normal sound signals are conveyed (position S). The video signal, Fig. 2b, of the photo-electric pick-up is passed to a circuit C1 wherein the pulsed oscillations of Fig. 2m are produced. Signals 2d and 2e derived from differentiating the limited video signal, are fed from circuit C1 to line scan generator B1 to produce the two speed line scan 2h. A frame scan generator A produces an increase in a step voltage output when a a new end line pulse is counted. Outputs from generators A1 and B1 control both the flying spot scanner and the reproducer tube. Received pulsed oscillations, Fig. 3a, are fed to circuit E1 wherein an intensity modulation signal, Fig. 3h, is produced as well as a line scan signal, Fig. 3g, enabling the reproduction of the image Fig. 3i. Fig. 10 (not shown) shows in detail an arrangement whereby normal telephone conversation takes precedence over image transmission, shuts off the video transmission and lets the speech through. To enable speed to be detected during brief pauses in words &c., a side tone is added to the speech. If the pulses of oscillation are at supersonic frequencies, then simultaneous speech and video may take place.

GB36136/67A
1966-08-06
1967-08-07
Electronic System for Transmission of Two Tone Images

Expired

GB1183107A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

IT2117766

1966-08-06

Publications (1)

Publication Number
Publication Date

GB1183107A
true

GB1183107A
(en)

1970-03-04

Family
ID=11177921
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB36136/67A
Expired

GB1183107A
(en)

1966-08-06
1967-08-07
Electronic System for Transmission of Two Tone Images

Country Status (3)

Country
Link

US
(1)

US3567851A
(en)

GB
(1)

GB1183107A
(en)

NL
(1)

NL6710702A
(en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

BR8807572A
(en)

1988-04-14
1990-04-10
Inst Registratsii Inf An Ukssr

DEVICE FOR VISUAL REPRESENTATION OF INFORMATION

1967

1967-04-24
US
US633190A
patent/US3567851A/en
not_active
Expired – Lifetime

1967-08-03
NL
NL6710702A
patent/NL6710702A/xx
unknown

1967-08-07
GB
GB36136/67A
patent/GB1183107A/en
not_active
Expired

Also Published As

Publication number
Publication date

US3567851A
(en)

1971-03-02

NL6710702A
(en)

1968-02-07

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