A circuit and process perform trilinear filtering using four texels (called "nearest texels") that are nearest to a to-be-displayed pixel, and also using twelve additional texels (called "surrounding texels") that surround the nearest texels. The nearest texels and the surrounding texels (together called...http://www.google.ca/patents/US6452603?utm_source=gb-gplus-sharePatent US6452603 - Circuit and method for trilinear filtering using texels from only one level of detail
