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 GMCH intercepts the DVD pipeline at Motion Compensation 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 GMCH's implementation of Hardware Motion Compensation supports a motion smoothing algorithm. When the system processor is not able to process the MPEG decoding stream in a timely manner (as can happen in software DVD implementations), the Intel® 810 graphics accelerator supports downsampled MPEG decoding. Downsampling allows for reduced spatial resolution in the MPEG picture while maintaining a full frame rate, and thus reduces processor load while maintaining the best video quality possible given the processor constraints. For more information, refer to the Intel® 810 Chipset: Intel® 82810/82810-DC100 Graphics and Memory Controller Hub datasheet.
This applies to: