GB1332738A - Creación de Inventos y Patentes con Inteligencia Artificial

GB1332738A – Image transmission
– Google Patents

GB1332738A – Image transmission
– Google Patents
Image transmission

Info

Publication number
GB1332738A

GB1332738A
GB2583071*A
GB2583071A
GB1332738A
GB 1332738 A
GB1332738 A
GB 1332738A

GB 2583071 A
GB2583071 A
GB 2583071A
GB 1332738 A
GB1332738 A
GB 1332738A
Authority
GB
United Kingdom
Prior art keywords
store
transmission
coding circuit
pulses
scanner
Prior art date
1970-04-02
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
GB2583071*A
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.)

Robert Bosch Elektronik GmbH

Original Assignee
Robert Bosch Elektronik GmbH
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.)
1970-04-02
Filing date
1971-04-19
Publication date
1973-10-03

1971-04-19
Application filed by Robert Bosch Elektronik GmbH
filed
Critical
Robert Bosch Elektronik GmbH

1973-10-03
Publication of GB1332738A
publication
Critical
patent/GB1332738A/en

Status
Expired
legal-status
Critical
Current

Links

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Global Dossier

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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

H04N1/41—Bandwidth or redundancy reduction

H04N1/411—Bandwidth or redundancy reduction for the transmission or storage or reproduction of two-tone pictures, e.g. black and white pictures

H04N1/413—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information

H04N1/419—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information in which encoding of the length of a succession of picture-elements of the same value along a scanning line is the only encoding step

Abstract

1332738 Image transmission ROBERT BOSCH ELEKTRONIK GmbH 19 April 1971 [2 April 1970] 25830/71 Heading H4F In an image transmission system a line of information is scanned by a scanner 4 to produce voltages corresponding to brightness values corresponding to black and white regions of the image and fed to store 6. At the end of the line, coding circuit 8 cuts the connection between scanner 4 and store 6 and establishes a connection between store 6 and coding circuit 8. Pulse control circuit 29 supplies to store 6 read-out pulses while the coding circuit 8 counts the number of pulses corresponding to equal brightness voltage values to evaluate the time duration of each such brightness voltage value as a number of pulses. The store is erased simultaneously. The pulses counted by the coding circuit 8 are encoded for transmission. The speed at which the encoded information is transmitted, in the form of pulse blocks, is at a pulse recurrence frequency as near as possible to the maximum transmittable frequency of the transmission channel. After transmission of a line of information coding circuit 8 sends a control signal to control circuit 17 to drive the scanner to the next line. At the end of scanning the coding circuit 8 controls pulse control circuit 29 to stop further read-out pulses being fed to store 6 and interrupts connections between the store 6 and itself and store 6 and scanner 4 which returns to its original position. The receiver essentially involves only a reversal of the sequence of steps carried out at the transmitter, the recording of the recovered brightness values being carried out by an electrode burning the metal coating of a metallic paper for the black values and leaving it unburnt for the white values. A further embodiment, (Fig. 3, not shown), is described for reducing the lost time which occurs between transmission of the pulse signals for respective image lines. In this embodiment an extra store is provided in both transmitter and receiver, the two stores being fed and read sequentially so that continuous transmission of information is provided.

GB2583071*A
1970-04-02
1971-04-19
Image transmission

Expired

GB1332738A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

DE19702015695

DE2015695A1
(en)

1970-04-02
1970-04-02

Process for the transmission of an original image

Publications (1)

Publication Number
Publication Date

GB1332738A
true

GB1332738A
(en)

1973-10-03

Family
ID=5766892
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB2583071*A
Expired

GB1332738A
(en)

1970-04-02
1971-04-19
Image transmission

Country Status (3)

Country
Link

US
(1)

US3723641A
(en)

DE
(1)

DE2015695A1
(en)

GB
(1)

GB1332738A
(en)

Cited By (1)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

EP0031418A1
(en)

1979-12-28
1981-07-08
International Business Machines Corporation
Method and apparatus for transmitting information

Families Citing this family (8)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US3909515A
(en)

1973-03-27
1975-09-30
Magnavox Co
Facsimile system with memory

US3935379A
(en)

1974-05-09
1976-01-27
General Dynamics Corporation
Method of and system for adaptive run length encoding of image representing digital information

US3993862A
(en)

1974-07-05
1976-11-23
Lawrence Karr
Data compression

US4152697A
(en)

1976-08-11
1979-05-01
Xerox Corporation
Parallel run-length decoder

JPS5537003A
(en)

1978-09-07
1980-03-14
Hitachi Ltd
Facsimile transmitter having redundancy suppression function

JPS55124358A
(en)

1979-03-17
1980-09-25
Ricoh Co Ltd
Picture information reading system

US5623556A
(en)

1990-07-31
1997-04-22
Kabushiki Kaisha Toshiba
System and method of extracting binary image data

KR100276768B1
(en)

1993-01-28
2001-01-15
윤종용

Changed Pixel Detector for Encoding Image Data

Family Cites Families (4)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US2909601A
(en)

1957-05-06
1959-10-20
Bell Telephone Labor Inc
Facsimile communication system

US2978535A
(en)

1960-01-28
1961-04-04
Bell Telephone Labor Inc
Optimal run length coding of image signals

US3483317A
(en)

1966-06-10
1969-12-09
Xerox Corp
Selective encoding technique for band-width reduction in graphic communication systems

US3510576A
(en)

1966-10-03
1970-05-05
Xerox Corp
Data sampler circuit for determining information run lengths

1970

1970-04-02
DE
DE19702015695
patent/DE2015695A1/en
active
Pending

1971

1971-03-31
US
US00129815A
patent/US3723641A/en
not_active
Expired – Lifetime

1971-04-19
GB
GB2583071*A
patent/GB1332738A/en
not_active
Expired

Cited By (1)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

EP0031418A1
(en)

1979-12-28
1981-07-08
International Business Machines Corporation
Method and apparatus for transmitting information

Also Published As

Publication number
Publication date

US3723641A
(en)

1973-03-27

DE2015695A1
(en)

1971-12-23

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