[M4IF Technotes] about AC/DC prediction

[Santosh Chapaneri]

hi,
halfsample search is carried out in the following manner
the 1st frame is always I-CODED.
so there is no question of motion estimation in the 1st frame.
from the second frame onwards....
1. upsample and interpolate the previous frame.
2. carry out the motion estimation on the interpolated upsampled
reconstructed previous frame.
note however that if u use the reconstructed frame instead of the original
previous frame u wont get the exact motion for the color components
regds
----- Original Message -----
From: <wuks   bhnec.nec.co.jp>
To: <technotes   lists.m4if.org>
Sent: Tuesday, July 02, 2023 1:37 PM
Subject: [M4IF Technotes] about AC/DC prediction
how to half sample search?
1¡¢ the reconstructed VOP and the current MB are also upsampled? or
2¡¢only the reconstructed VOP is upsampled?
if it's item 1, how to get predicting error?
if it's item 2, it's a bolck in the reconstructed VOP that uses to estimate
a MB in the current VOP?
thank very much for your help!
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