In *Encyclopedia of Multimedia*, pages 440–441. Springer US, 2008. 00000

Paper abstract bibtex

Paper abstract bibtex

DefinitionHalf-pixel accurate motion vectors can be found by interpolating the current frame and reference frame by a factor of two and then using any of the fast block matching algorithms for motion estimation.In real world video sequences, the true frame-to-frame displacements are unrelated to the integer pixel sampling grids. Thus, the motion prediction accuracy is limited to integer-pel accuracy. In fact, the motion prediction accuracy can be improved by half-pel accurate motion estimation. That is to determine motion vectors with half-pel accuracy. Many coding standards [1,2] permit motion vectors to be specified to a half-pixel accuracy.Half-pixel accurate motion vectors can be found by interpolating the current frame and reference frame by a factor of two and then using any of the fast block matching algorithms for motion estimation. The method in finding the half-pel accurate motion vector is illustrated as follows.Step 1 Find the motion vector with integer-pixel accu ...

@incollection{furht_motion_2008-1, title = {Motion {Estimation} with {Half}-{Pixel} {Accuracy}}, copyright = {©2008 Springer-Verlag}, isbn = {978-0-387-74724-8 978-0-387-78414-4}, url = {http://link.springer.com/referenceworkentry/10.1007/978-0-387-78414-4_116}, abstract = {DefinitionHalf-pixel accurate motion vectors can be found by interpolating the current frame and reference frame by a factor of two and then using any of the fast block matching algorithms for motion estimation.In real world video sequences, the true frame-to-frame displacements are unrelated to the integer pixel sampling grids. Thus, the motion prediction accuracy is limited to integer-pel accuracy. In fact, the motion prediction accuracy can be improved by half-pel accurate motion estimation. That is to determine motion vectors with half-pel accuracy. Many coding standards [1,2] permit motion vectors to be specified to a half-pixel accuracy.Half-pixel accurate motion vectors can be found by interpolating the current frame and reference frame by a factor of two and then using any of the fast block matching algorithms for motion estimation. The method in finding the half-pel accurate motion vector is illustrated as follows.Step 1 Find the motion vector with integer-pixel accu ...}, language = {en}, urldate = {2016-05-03}, booktitle = {Encyclopedia of {Multimedia}}, publisher = {Springer US}, editor = {Furht, Borko}, year = {2008}, note = {00000}, pages = {440--441} }

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