Intel N475 AU80610006240AA User Manual
Product codes
AU80610006240AA
Datasheet
29
Functional Description
3.2.1.2
Texture Engine
The GPU allows an image, pattern, or video to be placed on the surface of the 3D
polygon. The texture processor receives the texture coordinate information from the
setup engine and the texture blend information from the scan converter. The texture
processor performs texture color or ChromaKey matching, texture filtering (anisotropic,
trilinear, bilinear interoplation), and YUV-to-RGB conversions.
polygon. The texture processor receives the texture coordinate information from the
setup engine and the texture blend information from the scan converter. The texture
processor performs texture color or ChromaKey matching, texture filtering (anisotropic,
trilinear, bilinear interoplation), and YUV-to-RGB conversions.
3.2.2
Video Engine
The Video Engine handles the non-3D (media/video) applications. It includes support
for VLD and MPEG2 decode in Hardware. The CGPU engine includes a number of
encompassments over the previous generation capabilities, which have been listed
above.
for VLD and MPEG2 decode in Hardware. The CGPU engine includes a number of
encompassments over the previous generation capabilities, which have been listed
above.
3.2.2.1
Hardware Motion Compensation
The Motion Compensation (MC) process consists of reconstructing a new picture by
predicting (either forward, backward or bidirectionally) the resulting pixel colors from
one or more reference pictures. The GPU receives the video stream and implements
Motion Compensation and subsequent steps in hardware. Performing Motion
Compensation in hardware reduces the processor demand of software-based MPEG-2
decoding, and thus improves system performance.
predicting (either forward, backward or bidirectionally) the resulting pixel colors from
one or more reference pictures. The GPU receives the video stream and implements
Motion Compensation and subsequent steps in hardware. Performing Motion
Compensation in hardware reduces the processor demand of software-based MPEG-2
decoding, and thus improves system performance.
The Motion Compensation functionality is overloaded onto the texture cache and
texture filter. The texture cache is used to typically access the data in the
reconstruction of the frames and the filter is used in the actual motion compensation
process. To support this overloaded functionality the texture cache additionally
supports the following input format: YUV420 planar.
texture filter. The texture cache is used to typically access the data in the
reconstruction of the frames and the filter is used in the actual motion compensation
process. To support this overloaded functionality the texture cache additionally
supports the following input format: YUV420 planar.
3.2.2.2
Sub-Picture Support
Sub-picture is used for two purposes, one is subtitles for movie captions, etc. (which
are superimposed on a main picture), and “menus” used to provide some visual
operation environments the user of a content player.
are superimposed on a main picture), and “menus” used to provide some visual
operation environments the user of a content player.
DVD allows movie subtitles to be recorded as Sub-pictures. On a DVD disc, it is called
“subtitle” because it has been prepared for storing captions. Since the disc can have a
maximum of 32 tracks for subtitles, they can be used for various applications, for
example, as subtitles in different languages or other information to be displayed.
“subtitle” because it has been prepared for storing captions. Since the disc can have a
maximum of 32 tracks for subtitles, they can be used for various applications, for
example, as subtitles in different languages or other information to be displayed.
There are two kinds of Menus, the System Menus and other In-Title Menus. First, the
System Menus are displayed and operated at startup of or during the playback of the
disc or from the stop state. Second, In-Title menus can be programmed as a
combination of Sub-picture and Highlight commands to be displayed during playback of
the disc.
System Menus are displayed and operated at startup of or during the playback of the
disc or from the stop state. Second, In-Title menus can be programmed as a
combination of Sub-picture and Highlight commands to be displayed during playback of
the disc.