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. 05, 1994
Filed:
Oct. 22, 1992
Arturo A Rodriquez, Belmont, CA (US);
Mark A Pietras, Boynton Beach, FL (US);
Steven M Hancock, Boca Raton, FL (US);
Robert F Kantner, Jr, Boca Raton, FL (US);
Charles T Rutherfoord, Delray Beach, FL (US);
Leslie R Wilson, Boca Raton, FL (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Decompression of video segments from a sequence of differential frames is done by selected scaling of frame resolution and color depth. A frame header indicates the computational complexity of decompression of a frame, allowing selection of scales for output resolution and color depth. Decompression proceeds by retrieving a frame from the compressed video stream in elementary units. An elementary unit is characterized by types, including an unchanged type, a homogeneous type, a pattern type and a predetermined pattern type. For a retrieved elementary unit of the unchanged type, an output pointer to a display buffer is moved by an elementary unit scaled by the output resolution scale. For a retrieved elementary unit of the homogeneous type, a color retrieved from the compressed video stream is applied to an area in the display buffer corresponding to an elementary unit scaled by the output resolution scale. For a retrieved elementary unit of the predetermined pattern type, a pattern from a table of patterns is retrieved using an index from the compressed video segment as an address. Two colors for the pattern are also retrieved and applied to the pattern.