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:
Jun. 02, 1998
Filed:
Jan. 22, 1996
Bryan Keith Bullis, Apex, NC (US);
William Robert Lee, Apex, NC (US);
Michael Patrick Muhlada, Wake Forest, NC (US);
Darryl Jonathan Rumph, Cary, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Video data is decompressed in a coder/decoder (CODEC) and then scaled in a scaler device before being provided to a frame buffer within a display adapter of a data processing system. Since the scaling of the video data often results in a significant increase in the required bandwidth, a buffer implemented within the scaling device may reach a threshold level whereby it is not desired that any more scaled data be received before being transmitted to the frame buffer. When such a threshold level is reached, a stall signal is sent to the interface between the scaler device and the CODEC device providing the pixel data, which results in the stopping of the transmission of pixel data from the CODEC to the scaler device. Assertion of the stall signal results in the suspension of the transmission of the horizontal and vertical synchronization signals and the pixel clock signal from the scaler device to the CODEC device.