HK77696A - Circuitry for the compression of digital data words by means of a scale factor - Google Patents

Circuitry for the compression of digital data words by means of a scale factor

Info

Publication number
HK77696A
HK77696A HK77696A HK77696A HK77696A HK 77696 A HK77696 A HK 77696A HK 77696 A HK77696 A HK 77696A HK 77696 A HK77696 A HK 77696A HK 77696 A HK77696 A HK 77696A
Authority
HK
Hong Kong
Prior art keywords
words
data words
data
parts
scale factor
Prior art date
Application number
HK77696A
Inventor
Joachim Dipl-Ing Luedecke
Original Assignee
Thomson Brandt 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.)
Filing date
Publication date
Application filed by Thomson Brandt Gmbh filed Critical Thomson Brandt Gmbh
Publication of HK77696A publication Critical patent/HK77696A/en

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)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

This method and device are intended to provide for very fast data processing speed with little circuit expenditure. For this purpose, the data words provided for the compressed data are split into at least two parts, from the data words of the uncompressed data address words are formed and split into the same number of parts and to each part of the address words a word length is allocated which corresponds to the difference between the word length of the uncompressed data words and the word lengths of the remaining parts of the data words provided for the compressed data. After that, a selected section of the uncompressed data words is allocated as part of the compressed data words to each part of the address words in conjunction with the scale factor in accordance with a stored code table. These parts are then assembled to form complete compressed data words. The invention can be applied, in particular, in the case of D2-Mac for data compression when the system switches from "linear code" to "companded code".
HK77696A 1987-03-03 1996-05-02 Circuitry for the compression of digital data words by means of a scale factor HK77696A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873706791 DE3706791A1 (en) 1987-03-03 1987-03-03 METHOD AND CIRCUIT ARRANGEMENT FOR COMPRESSING DATA WORDS WITH THE AID OF A SCALE FACTOR

Publications (1)

Publication Number Publication Date
HK77696A true HK77696A (en) 1996-05-10

Family

ID=6322172

Family Applications (1)

Application Number Title Priority Date Filing Date
HK77696A HK77696A (en) 1987-03-03 1996-05-02 Circuitry for the compression of digital data words by means of a scale factor

Country Status (4)

Country Link
EP (1) EP0281061B1 (en)
AT (1) ATE117142T1 (en)
DE (2) DE3706791A1 (en)
HK (1) HK77696A (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2112726A5 (en) * 1970-11-06 1972-06-23 Sercel Rech Const Elect
GB2125255B (en) * 1982-07-28 1985-11-13 British Broadcasting Corp Digital data coding
EP0133697B1 (en) * 1983-08-05 1990-11-22 Institut für Rundfunktechnik GmbH Method of transmitting digital sound signals and apparatus for receiving a sound signal transmitted according to this method

Also Published As

Publication number Publication date
ATE117142T1 (en) 1995-01-15
EP0281061A2 (en) 1988-09-07
DE3706791A1 (en) 1988-09-15
EP0281061A3 (en) 1990-12-05
DE3852705D1 (en) 1995-02-23
EP0281061B1 (en) 1995-01-11

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Legal Events

Date Code Title Description
PF Patent in force
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20050301