GB1328266A - Digital data coding system - Google Patents

Digital data coding system

Info

Publication number
GB1328266A
GB1328266A GB5164670A GB5164670A GB1328266A GB 1328266 A GB1328266 A GB 1328266A GB 5164670 A GB5164670 A GB 5164670A GB 5164670 A GB5164670 A GB 5164670A GB 1328266 A GB1328266 A GB 1328266A
Authority
GB
United Kingdom
Prior art keywords
column
count
transitions
display
bits
Prior art date
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
GB5164670A
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1328266A publication Critical patent/GB1328266A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
    • G09G1/06—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows
    • G09G1/14—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows the beam tracing a pattern independent of the information to be displayed, this latter determining the parts of the pattern rendered respectively visible and invisible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41B—MACHINES OR ACCESSORIES FOR MAKING, SETTING, OR DISTRIBUTING TYPE; TYPE; PHOTOGRAPHIC OR PHOTOELECTRIC COMPOSING DEVICES
    • B41B19/00—Photoelectronic composing machines
    • B41B19/01—Photoelectronic composing machines having electron-beam tubes producing an image of at least one character which is photographed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41B—MACHINES OR ACCESSORIES FOR MAKING, SETTING, OR DISTRIBUTING TYPE; TYPE; PHOTOGRAPHIC OR PHOTOELECTRIC COMPOSING DEVICES
    • B41B27/00—Control, indicating, or safety devices or systems for composing machines of various kinds or types

Abstract

1328266 Cathode-ray tube displays; facsimile systems INTERNATIONAL BUSINESS MACHINES CORP 30 Oct 1970 [4 Nov 1969] 51646/70 Heading H4F and H4T In a photocomposing system in which typographical images are produced on the screen of a cathode-ray display tube (and recorded on photographic film) under the control of a digital data code derived from a remote location or from a computer the code is produced in a "compressed" form by employing run-length coding for both the X and Y co-ordinates of each image the "compressed" code being "expanded" for controlling the production of the display. Thus, the lower case character "e" shown in Fig. 2 is coded in terms of the grid pattern (in practice a much finer grid is employed) by initially deriving a count (counting upwardly from the bottom of the grid) of the number of bits in vertical column 4 of the white portion of the display, i.e. 13 bits and a count of the number of bits of the black portion of the display (the first vertical segment of the character), i.e. 7 bits. Vertical column 5 is then analysed and a count of the difference between the white and black portions, i.e. - 3 and + 5 respectively is derived. Vertical columns 6 and 7 are analysed in similar manner giving count differences of - 2, + 4 and - 1, + 2 respectively. When, however, the number of White-Black transitions changes (columns 4 to 7 each have two such transitions whereas column 8 has four and column 9 has six transitions) it is necessary to derive a full count of the bits, i.e. column 8 has 6, 7, 3, 10 and column 9 has 5, 6, 5, 3, 2, 6 after which difference are produced for columns 10 to 24 all of which have six transitions. Column 25 which has four transitions is derived in a full length count 6, 6, 4, 10, columns 26 to 28 as difference count and columns 29 which has two transitions as a full length count 16, 4. Character data coded in the manner described is stored in a computer 10 (Fig. 1) and when required is sent to a data expander 12 in an eight bit per byte binary code the expander and the display control 13 (detailed in Fig. 3, not shown) supplying the beam blanking and unblanking signals which are required to reproduce successively the vertical column 4 to 29 of Fig. 2 during successive fixed position vertical scans on the display tube 14 the horizontal positions of each column on the photographic film 16 being controlled by a moving lens responsive to display controls 13. The detailed operation is described.
GB5164670A 1969-11-04 1970-10-30 Digital data coding system Expired GB1328266A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US87379469A 1969-11-04 1969-11-04

Publications (1)

Publication Number Publication Date
GB1328266A true GB1328266A (en) 1973-08-30

Family

ID=25362329

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5164670A Expired GB1328266A (en) 1969-11-04 1970-10-30 Digital data coding system

Country Status (6)

Country Link
US (1) US3686631A (en)
BE (1) BE758268A (en)
CA (1) CA957073A (en)
DE (1) DE2053341A1 (en)
FR (1) FR2071741A5 (en)
GB (1) GB1328266A (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3991267A (en) * 1970-01-26 1976-11-09 Eg & G, Inc. Method for producing a compressed digital representation of a visible image
FR2115686A5 (en) * 1970-11-30 1972-07-07 Labo Cent Telecommunicat
US3956580A (en) * 1970-12-30 1976-05-11 Ricoh Co., Ltd. System for reducing the transmission time of similar portions of visible images
JPS5433496B2 (en) * 1972-04-18 1979-10-20
SE375171B (en) * 1973-05-15 1975-04-07 Werns Inter Vvs Ab
US4103287A (en) * 1973-12-17 1978-07-25 Bell Telephone Laboratories, Incorporated Variable length codes for high quality image encoding
JPS52105734A (en) * 1976-03-01 1977-09-05 Canon Inc Signal coverter
US4152697A (en) * 1976-08-11 1979-05-01 Xerox Corporation Parallel run-length decoder
DE2701001C3 (en) * 1977-01-12 1979-06-28 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Process for obtaining control data for electronic phototypesetting systems
JPS53124940A (en) * 1977-04-06 1978-10-31 Shinko Electric Co Ltd Data processing system
US4313114A (en) * 1980-05-30 1982-01-26 Leupold & Stevens, Inc. Liquid level recorder apparatus and method for storing level differences in memory
US4442545A (en) * 1981-05-27 1984-04-10 Rca Corporation Compaction of television display graphics in phantom-raster-scanned image memory
US4560976A (en) * 1981-10-15 1985-12-24 Codex Corporation Data compression
US4562423A (en) * 1981-10-15 1985-12-31 Codex Corporation Data compression
US4876607A (en) * 1982-03-31 1989-10-24 International Business Machines Corporation Complex character generator utilizing byte scanning
US4633505A (en) * 1984-11-23 1986-12-30 Xerox Corporation Character compression technique
JPH0693245B2 (en) * 1985-04-20 1994-11-16 富士写真フイルム株式会社 Form information compression method
JP3083344B2 (en) * 1990-05-25 2000-09-04 ヒューレット・パッカード・カンパニー Data compression and decompression methods
DE4443959A1 (en) * 1994-12-09 1996-06-20 Walter Dr Mehnert Process for serial transmission of digital measured values
DE19933491A1 (en) * 1999-07-09 2001-02-01 Walter Mehner Method for serial transmission of digital measurement data

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061672A (en) * 1960-07-25 1962-10-30 Sperry Rand Corp Run length encoder
US3230514A (en) * 1961-04-28 1966-01-18 Sperry Rand Corp Selectable word length buffer storage system
US3225333A (en) * 1961-12-28 1965-12-21 Ibm Differential quantitized storage and compression
US3305841A (en) * 1963-09-30 1967-02-21 Alphanumeric Inc Pattern generator
US3347981A (en) * 1964-03-18 1967-10-17 Polaroid Corp Method for transmitting digital data in connection with document reproduction system
US3295105A (en) * 1964-08-27 1966-12-27 Sylvania Electric Prod Scan control and normalization for a character recognition system
US3449726A (en) * 1965-11-20 1969-06-10 Sony Corp Number display system
US3293605A (en) * 1966-01-20 1966-12-20 Moore Laurence Digital monitoring system
US3439753A (en) * 1966-04-19 1969-04-22 Bell Telephone Labor Inc Reduced bandwidth pulse modulation scheme using dual mode encoding in selected sub-block sampling periods
US3483317A (en) * 1966-06-10 1969-12-09 Xerox Corp Selective encoding technique for band-width reduction in graphic communication systems
GB1189982A (en) * 1966-06-15 1970-04-29 Xerox Corp Binary Encoding
US3502806A (en) * 1966-08-01 1970-03-24 Xerox Corp Modified run length data reduction system

Also Published As

Publication number Publication date
BE758268A (en) 1971-04-01
FR2071741A5 (en) 1971-09-17
CA957073A (en) 1974-10-29
US3686631A (en) 1972-08-22
DE2053341A1 (en) 1972-05-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee