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:
Sep. 16, 2003
Filed:
Sep. 07, 1999
Applicant:
Inventors:
Sharif Mohammad Sazzad, Monmouth Junction, NJ (US);
Frank Anton Lane, Medford Lakes, NJ (US);
Assignee:
Hitachi America, Ltd, Tarrytown, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N 7/12 ;
U.S. Cl.
CPC ...
H04N 7/12 ;
Abstract
Edge detection methods and apparatus which utilize the dc dct differential data included in encoded images, e.g., an MPEG-2 encoded video stream, are described. Use of the dc dct differential data allows efficient methods for detecting the presence of edges within encoded images. The edge detection methods and apparatus of the present invention can be used where differential coding of the DC DCT coefficients is employed. Accordingly, the edge detection methods of the present invention are applicable to MPEG-2 encoded images as well as other differentially encoded images.