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1. (WO1980000107) APPARATUS AND METHOD FOR COMPRESSING DATA
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1980/000107 International Application No.: PCT/US1979/000409
Publication Date: 24.01.1980 International Filing Date: 11.06.1979
IPC:
H03M 7/30 (2006.01)
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
M
CODING, DECODING OR CODE CONVERSION, IN GENERAL
7
Conversion of a code where information is represented by a given sequence or number of digits to a code where the same information is represented by a different sequence or number of digits
30
Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
Applicants:
Inventors:
Priority Data:
91482112.06.1978US
Title (EN) APPARATUS AND METHOD FOR COMPRESSING DATA
(FR) APPAREIL ET METHODE DE CONDENSATION DE DONNEES
Abstract:
(EN) A method and apparatus for compressing data messages (36) relating to merchandise transaction and generated by a data terminal device (20). The data messages (36) are compressed into data records (46) which are stored in a storage device (32). A counter (58) controls the operation of a sequencing device (60) which controls the production of timing control signals (TC) effective to delete known redundant data in the input message (36) and to provide a start-of-record character (SOTA, SOTB) dependent on the information content of a predetermined non-redundant character (QUAL CODE) in the input message (36), and determining the start of the compressed data record (46). Other non-redundant data which can be determined from the corresponding data in a previous message are also deleted.
(FR) Une methode et un appareil de condensation des donnees de message (36) se rapportant a des transactions commerciales est emis a partir d"un dispositif terminal de donnees (20). Les donnees et messages (36) sont condenses dans des enregistrements de donnees (46) qui sont emmaganises dans un dispositif a memoire (32). Un compteur (58) commande le fonctionnement d"un dispositif de mise en sequence (60) qui commande la production de signaux de commande de duree (TC) qui supprime les donnees redondantes connues dans le message d"entree (36) et qui produisent un caractere de depart d"enregistrement (SOTA, SOTB) en fonction du contenu de l"information d"un caractere non redondant predetermine (QUAL CODE) dans le message d"entree (36), et determinant le depart de l"enregistrement des donnees condensees (46). D"autres donnees non redondantes qui peuvent etre determinees a partir de donnees correspondantes dans un message anterieur sont egalement supprimees.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)