GB1207701A - Encoding system - Google Patents

Encoding system

Info

Publication number
GB1207701A
GB1207701A GB0081/68A GB108168A GB1207701A GB 1207701 A GB1207701 A GB 1207701A GB 0081/68 A GB0081/68 A GB 0081/68A GB 108168 A GB108168 A GB 108168A GB 1207701 A GB1207701 A GB 1207701A
Authority
GB
United Kingdom
Prior art keywords
characters
register
character
bit
circuit
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
GB0081/68A
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.)
Xerox Corp
Original Assignee
Xerox 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 Xerox Corp filed Critical Xerox Corp
Publication of GB1207701A publication Critical patent/GB1207701A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

1,207,701. Recording; selecting cards. XEROX CORP. 8 Jan., 1968 [9 Jan., 1967], No. 1081/68. Headings G4A and G4M. In a system which may be used for selecting notched cards, a descriptor comprising q m-bit characters is converted to n m-bit characters, n being less than q, by logically combining the (n + 1 )th to qth characters with n characters stored in a shift register 10. An alphanumeric keyboard 2 and an associated diode matrix provide 4-bit coded characters, each code group being associated with several alphanumeric characters. Each character is entered in parallel in an input shift register 6, and entry of each character triggers a timing circuit 4 to generate a train of four clock pulses which shift a stored character serially by bit into shift register 10 via decision circuit 8. This process is repeated for the first n characters, but thereafter, each character shifted out of register 6 is directed to one input of logic circuit 12, the other input receiving concurrently the characters previously stored in register 10, in the original sequence. Circuit 12 performs the equivalence function and its output is shifted into register 10. The system continues to operate in this manner until the complete descriptor has been entered. Output register 14 and converter 16 may operate a card selection mechanism.
GB0081/68A 1967-01-09 1968-01-08 Encoding system Expired GB1207701A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US60801567A 1967-01-09 1967-01-09

Publications (1)

Publication Number Publication Date
GB1207701A true GB1207701A (en) 1970-10-07

Family

ID=24434673

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0081/68A Expired GB1207701A (en) 1967-01-09 1968-01-08 Encoding system

Country Status (3)

Country Link
US (1) US3689915A (en)
DE (1) DE1562051B2 (en)
GB (1) GB1207701A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3953846A (en) * 1973-11-05 1976-04-27 Ekeland Thomas C Encoding device
JPS571007B2 (en) * 1974-06-07 1982-01-08
US4185190A (en) * 1974-10-28 1980-01-22 Compagnie Internationale pour L'Informatique, CII-Honeywell Bull (Societe Anonyme) Data accumulation and compression apparatus
US4267568A (en) * 1975-12-03 1981-05-12 System Development Corporation Information storage and retrieval system
US4068298A (en) * 1975-12-03 1978-01-10 Systems Development Corporation Information storage and retrieval system
US4383307A (en) * 1981-05-04 1983-05-10 Software Concepts, Inc. Spelling error detector apparatus and methods
US4527253A (en) * 1982-05-28 1985-07-02 Hitachi, Ltd. Data searching apparatus
US5745796A (en) * 1995-04-07 1998-04-28 Adventures In Ancestry, Inc. Method for compacting and storing date information by converting alphanumeric data into base eleven numbers which consists of numbers and characters representative of unknown digits
US20080147651A1 (en) * 2006-12-14 2008-06-19 International Business Machines Corporation Pre-Entry Text Enhancement For Text Environments
US9709433B2 (en) * 2014-06-30 2017-07-18 Rosemount Tank Radar Ab Pulsed radar level gauging with efficient start-up

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3290511A (en) * 1960-08-19 1966-12-06 Sperry Rand Corp High speed asynchronous computer
US3106636A (en) * 1960-08-31 1963-10-08 Gen Precision Inc Input-output system for digital computer
US3247365A (en) * 1961-02-06 1966-04-19 Gen Precision Inc Digital function generator including simultaneous multiplication and division
US3194951A (en) * 1962-05-24 1965-07-13 David H Schaefer Logarithmic converter
DE1249924B (en) * 1962-07-17
US3271517A (en) * 1963-01-02 1966-09-06 Rosa Andrew C De Data transmission
US3413618A (en) * 1964-10-19 1968-11-26 Automatic Elect Lab Memory apparatus employing a plurality of digit registers
US3394350A (en) * 1965-01-14 1968-07-23 Burroughs Corp Digital processor implementation of transfer and translate operation

Also Published As

Publication number Publication date
DE1562051A1 (en) 1970-03-12
US3689915A (en) 1972-09-05
DE1562051B2 (en) 1971-10-28

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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