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. 24, 2001
Filed:
Jun. 24, 1996
Applicant:
Inventor:
Jay Yogeshwar, Princeton, NJ (US);
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N 7/12 ; H04N 1/102 ; H04N 1/104 ;
U.S. Cl.
CPC ...
H04N 7/12 ; H04N 1/102 ; H04N 1/104 ;
Abstract
A compressed video decoder receives a stream of compressed video data in a channel buffer, and decompresses it. A portion of the decompressed video data is recompressed as intraframe data to serve as an anchor frame. The intraframe data is motion compensated, and then a reference picture is selected. The reference frame data is decompressed. Next, a region of interest is selected and stored in display memory for the decompressed form. The recompression of data to be used as an anchor frame can be done in a substantially lossless manner by using DCT with the same quantization matrix, quantizer scale, and field/frame coding type.