[M4IF Technotes] Quarterpel motion estimation

[Ramkishor Korada]

Hi,
 When quarter pel motion estimation is enabled, then halh pel samples are
not bilinearly interpolated. They are estimated at a block level by using
8-tap symmetrical FIR filter. At the block edges/boundaries, mirror
extension is done because of 8-tap filter. Quarter pel samples are
interpolated from the half pel and integer pel values. More details can be
found in Section 7.6.2.2. of the visual(14496-2) standard.
Doing interpolation on entire VOP is not possible.
regards,
ramkishor
Architect - Video
Multimedia Technologies Division
Emuzed India
Bangalore
www.emuzed.com
----- Original Message -----
From: "Vinod Kumar" <kmr   iis.fhg.de>
To: <technotes   lists.m4if.org>
Sent: Thursday, September 27, 2023 1:35 PM
Subject: [M4IF Technotes] Quarterpel motion estimation
> HI
> Has any one worked on quarterpel motion estimation. Is the
> interpolation for quarterpel done every macroblock or is the entire vop
> interpolated. Since half pel is bilinear interpolation, there wouldnt be
> a problem if the interpolation is done on one entire vop... but is that
> the case with quarterpel also?
>
> regards
> kmr
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