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:
Oct. 22, 2002
Filed:
Jan. 25, 1999
Francesco A. Campisano, Owego, NY (US);
Dennis P. Cheney, Vestal, NY (US);
David A. Hrusecky, Johnson City, NY (US);
Chuck H. Ngai, Endwell, NY (US);
Ronald S. Svec, Berkshire, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A digital video decoder system, method and article of manufacture are provided having integrated scaling capabilities for presentation of video in full size or a predetermined reduced size, while at the same time allowing for reduced external memory requirements for frame buffer storage. The integrated system utilizes an existing decimation unit to scale the decoded stream of video data when the system is in scaled video mode. Display mode switch logic oversees switching between normal video mode and scaled video mode, wherein the switching occurs without perceptual degradation of a display of the decoded stream of video data. Scaled decoded video frames are buffered in a frame buffer which is partitioned depending upon whether the digital video decoding system is in normal video mode or scaled video mode. In scaled video mode, the frame buffer accommodates both full size I and P frames, as well as scaled I, P & B frames. The full size I and P frames are used to support future decode operations, while the scaled I, P & B frames are retrieved for display.