Quarter Pixel (QPel) and Half Pixel Motion Compensation
In motion compensation, quarter or half samples are actually interpolated sub-samples caused by fractional motion vectors. Based on the vectors and full-samples, the sub-samples can be calculated by using bicubic or bilinear 2-D filtering. See subclause 8.4.2.2 "Fractional sample interpolation process" of the H.264 standard.
Read more about this topic: Motion Compensation
Famous quotes containing the words quarter, motion and/or compensation:
“Somewhere between a third and a quarter of all people living in America today were born between 1946 and 1965 and if you think you’re tired of hearing about us, you should try being one of us.”
—Anna Quindlen (b. 1952)
“Two children, all alone and no one by,
Holding their tattered frocks, thro’an airy maze
Of motion lightly threaded with nimble feet
Dance sedately; face to face they gaze,
Their eyes shining, grave with a perfect pleasure.”
—Laurence Binyon (1869–1943)
“I have everything in the world that is necessary to happiness, good faith, good friends and all the work I can possibly do. I think God’s greatest blessing to the human race was when He sent man forth into the world to earn his bread by the sweat of his face. I believe in toil, in the dignity of labor, but I also believe in adequate compensation for that toil.”
—Anna Howard Shaw (1847–1919)