The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 23, 1996
Filed:
Apr. 21, 1995
Fetchi Chen, Boca Raton, FL (US);
Daniel M Dorrance, Boca Raton, FL (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
This invention discloses a software mechanism for installing and identifying compression/decompression procedures thereby providing dynamic linking, while also supporting existing and future CODEC algorithms. The present procedure is a dynamically linked library installed as an entry in the system initialization file. Each entry is comprised of a four character code which uniquely identifies a file format, a compression type, and a compression subtype. Additional CODEC information in the entry of the system initialization file are the file name, the procedure name, the processing speed, and other attributes of compression algorithms. This method combined with the installed entry in the initialization file allows sharing of the same CODEC algorithm for different file formats and also provides for an existing application program to continue working, without modification, even at such time as when a new CODEC algorithm is added to the file format in a future installation.