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:
Aug. 17, 1993
Filed:
Dec. 24, 1991
Applicant:
Inventors:
Lee S Mighdoll, Palo Alto, CA (US);
Mark Krueger, Cupertino, CA (US);
Bruce A Leak, Palo Alto, CA (US);
Assignee:
Apple Computer, Inc., Cupertino, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358 13 ; 358133 ; 358426 ; 375122 ; 382 56 ;
Abstract
A method for determining if uncompressed color video data was previously compressed and decompressed. Each block of color video data is examined to determine if the block was previously compressed with a predetermined compression algorithm that for example, selected fewer colors than were present in the original data. If it is determined that such compression has previously occurred, on recompression, a different algorithm is used to prevent introduction of color distortions.