新近的一个专利，06年3月23日提出申请的，08年7月22日发出。
http://patft.uspto.gov/netacgi/n ... IA&RS=AN/NVIDIA
BACKGROUND
Conventional graphics processors are exemplified by systems and methods developed to reduce aliasing using supersampling or multisampling techniques that use fixed positions for sub-pixel samples. However, conventionally each pixel has the same fixed sub-pixel position, i.e., the sub-pixel positions are periodic. The human perception system is tuned to detect regular patterns, appearing as aliasing artifacts. To reduce aliasing, the sub-pixel positions should be non-periodic or vary over a region larger than a pixel. Furthermore, the sub-pixel sample positions should be programmable rather than fixed to allow an application to select a specific pattern, including a pattern that varies of several pixels.
There is thus a need for allowing flexibility in determining the positions of sub-pixel samples, including the ability to specify non-periodic sub-pixel positions to reduce aliasing.
看样子可以直接控制取样点的jitter位置，而这个offset动作是有专门的硬件来完成。
请注意，专利的申请可能与未来的产品并无任何直接关系。
