US 07,310,104 B2
Graphics display system with anti-flutter filtering and vertical scaling featureGeneral
US 07,310,104 B2
Graphics display system with anti-flutter filtering and vertical scaling feature
Tech Center:
2600 Communications
Examiner:
Wesner Sajous
Art Unit:
2628 Selective Visual Display Systems
Inventors:
Alexander G. MacInnis; Chengfuh Jeffrey Tang; Xiaodong Xie; James T. Patterson; Greg A. Kranawetter
Assignee:
Priority:
11/09/98
Filed:
08/28/06
Granted:
12/18/07
Expiration:
11/09/18
Abstract
A graphics integrated circuit chip is used in a set-top box for controlling a television display. The graphics chip processes analog video input, digital video input, and graphics input. The chip includes a single polyphase filter that preferably provides both anti-flutter filtering and scaling of graphics. Anti-flutter filtering may help reduce display flicker due to the interlaced nature of television displays. The scaling of graphics may be used to convert the normally square pixel aspect ratio of graphics to the normally rectangular pixel aspect ratio of video.
Cooperative Patent Classification (CPC)
G09G09G2310/0224G09GG06F3/0653G06T9/007G06FH04N21/440263H04N