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:
Dec. 21, 1993
Filed:
Mar. 20, 1992
Applicant:
Inventor:
Jeffrey E Frederiksen, Arlington Heights, IL (US);
Assignee:
Northwest Starscan Limited Partnership, Kent, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358133 ; 358 13 ;
Abstract
A method system for data reduction of digital video signals based on vector quantization of vectors formed from coefficients of a discrete cosine transform of pixel blocks. The coefficients are grouped into subbands and both scalar and vector quantization are used. Vector quantization is implemented either directly on the vectors or on vectors formed from inter-frame differences between the transformed vectors. The vector quantization searching routine is in accordance with the Voronoi regions resulting from an off-line codeword clustering method using a minimum distance criterion.