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:
Apr. 30, 1996
Filed:
Nov. 18, 1994
Yutaka Wakasu, Tokyo, JP;
NEC Corporation, , JP;
Abstract
An image compression and decompression apparatus wherein the scale of a required frame memory is reduced to allow reduction of the circuit scale is disclosed. The image compression and decompression apparatus comprises first and second frame memories each of which is used as, upon compression processing, a pre-frame memory for storing digital image data before compression but as, upon decompression processing, a post-frame memory for storing digital image data after decompression. First and second compressed image memories are each used as, upon compression processing, a transmission buffer for storing data after compression but as, upon decompression processing, a reception buffer for storing data before decompression. Each of the two kinds of memories is constructed in a double buffer structure. Control of two kinds of memory controllers for controlling accessing to the two kinds of memories, compression and decompression processing, and sequence control are effected using a program.