Dynamically linked and shared compression/decompression

Details Dynamically linked and shared compression/decompression Dynamically linked and shared compression/decompression

1995-04-21

1996-07-23

Kriess, Kevin A.

395154, G06F 944

Patent

active

055399088

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.

REFERENCES:
patent: 4924480 (1990-05-01), Gay et al.
patent: 4956806 (1990-09-01), Crowe et al.
patent: 5218697 (1993-06-01), Chung
patent: 5247681 (1993-09-01), Janis et al.
patent: 5371885 (1994-12-01), Letwin

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