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1. WO1990003272 - COMPRESSION AND DECOMPRESSION METHOD OF DOT MATRIX CHARACTER

Publication Number WO/1990/003272
Publication Date 05.04.1990
International Application No. PCT/JP1989/000965
International Filing Date 22.09.1989
Chapter 2 Demand Filed 02.03.1990
IPC
G06K 15/02 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
15Arrangements for producing a permanent visual presentation of the output data
02using printers
CPC
G06K 15/02
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
15Arrangements for producing a permanent visual presentation of the output data ; , e.g. computer output printers
02using printers
G06K 2215/0031
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
2215Arrangements for producing a permanent visual presentation of the output data
0002Handling the output data
002Generic data access
0028characterised by the format per se
0031Compressed bit maps
Applicants
  • OKI ELECTRIC INDUSTRY CO., LTD. [JP]/[JP] (AllExceptUS)
  • SHIMIZU, Tadao [JP]/[JP] (UsOnly)
  • ITOH, Toshikazu [JP]/[JP] (UsOnly)
Inventors
  • SHIMIZU, Tadao
  • ITOH, Toshikazu
Agents
  • SUZUKI, Toshiaki
Priority Data
63/23878026.09.1988JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) COMPRESSION AND DECOMPRESSION METHOD OF DOT MATRIX CHARACTER
(FR) PROCEDE DE COMPRESSION ET DE DECOMPRESSION DE CARACTERES MATRICIELS
Abstract
(EN)
This invention relates to a character compression-decompression method for printers. In accordance with this method, dots are added before a character is compressed and a character is generated in such a manner that the same dot pattern continues. Then, this character is compressed and stored in a character generator. When the character is to be printed, the compressed character is read out from the character generator and decompressed and then returned to the character before compression. The dots that are added at the time of compression are removed from this extended character. In this manner the present invention can compress those characters, which cannot be compressed because the same dot pattern does not continue, by a simple method and can store a large number of dot matrix characters in the character generator.
(FR)
Procédé de compression/décompression de caractères matriciels pour imprimantes. Selon ce procédé, on ajoute des points avant la compression d'un caractère et on génère un caractère de sorte que la même configuration de points continue. Le caractère est alors comprimé et enregistré dans un générateur de caractères. Lorsqu'on veut imprimer le caractère, on extrait le caractère comprimé du générateur de caractères et on le décomprime, de manière à lui redonner son aspect avant la compression. On élimine ensuite de ce caractère étendu les points qui avaient été ajoutés au moment de la compression. Ce procédé simple permet de comprimer les caractères que l'on ne pouvait comprimer jusqu'à présent à cause de la discontinuité de leur configuration de points, et permet également d'enregistrer un grand nombre de caractères matriciels dans le générateur de caractères.
Also published as
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