Video and graphics system with square graphics pixels
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jun 6, 2006
Grant Date -
Oct 31, 2002
app pub date -
Mar 5, 2001
filing date -
Mar 5, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A video and graphics system provides square graphics pixels to blend images having 640.times.480 pixels, such as graphics images provided by some set top boxes and intended to be displayed at a 12.27 MHz display sample rate, with images having 704.times.480 pixels, such as ITU-R 601 compliant images such as NTSC SDTV images, having oblong pixels and displayed at a 13.5 MHz display sample rate. A sample rate converter including a multi-phase-multi-tap filter is used to generate square pixels. The multi-phase-multi-tap filter provides a good balance of sharpness, smoothness, anti-aliasing and reduced ringing. The multi-phase-multi-tap filter can also be used to convert images having 320.times.480 pixels to images having 704.times.480 pixels. The multi-tap filter can be used for scan rate conversion of graphics or video images for HDTV or SDTV applications.
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