ATI Technologies 107-40214-20 Benutzerhandbuch
Page 22
Using QuickTime Playback
The RADEON
™
MAC
®
EDITION’s QuickTime playback
acceleration allows you to stretch even the smallest movies to
full screen size without compromising frame rate or image
full screen size without compromising frame rate or image
quality. RADEON
™
MAC
®
EDITION’s hardware scaler
maintains the original quality of your QuickTime movie when
scaling to a larger size – even full screen.
scaling to a larger size – even full screen.
The RADEON
™
MAC
®
EDITION’s QuickTime playback
acceleration displays in millions of colors, even if the current
color depth setting is 256 colors. When the monitor is set to
display in grayscale, QuickTime movies are accelerated in
grayscale, they are not converted to color. When scaling video,
color depth setting is 256 colors. When the monitor is set to
display in grayscale, QuickTime movies are accelerated in
grayscale, they are not converted to color. When scaling video,
RADEON
™
MAC
®
EDITION uses special hardware
techniques (alpha blending and chroma interpolation) to
enhance the video quality instead of just repeating pixels.
enhance the video quality instead of just repeating pixels.
To use RADEON
™
MAC
®
EDITION’s playback acceleration,
you must have QuickTime version 4.0 or greater installed on
your computer.
your computer.
Optimizing Video Playback
When you scale a movie, your computer switches from
QuickTime’s software scaler to RADEON
™
MAC
®
EDITION’s
hardware scaler to produce better results. However, QuickTime
will not switch to hardware scaling in the following situations:
will not switch to hardware scaling in the following situations:
•
playing video in double size
Try manually scaling the video slightly off exactly
double the size.
Try manually scaling the video slightly off exactly
double the size.
•
pausing the video
•
using single frame advance
•
watching the video in reverse
•
playing a video that has not been saved in Cinepak, Indeo,
or MPEG-1 compressed format
or MPEG-1 compressed format
NOTE