[Mp4-tech] Q-pel interpolation

[Satendra]

Hi,
I want to know the maximum size in bits, the intermediate values of Q-Pel
interpolation may take.
Considering this figure
E         F           G   a     b    c    H               I                J
                        d    e     f     g
                        h    i      j     k    m
                        n    p     q    r
K        L            M         s          N             P               Q
My concern is while interpolating for  j, f, q, i, k  locations.
Here finally we need to scale/shift the values by 10, does it mean that
intermediate values can be of 18 bits. Hence all the operations of H264
decode can't be completed in 16 bit arithmetic.
Thanks
Satendra
-- 
-----------------------------------------------------------------------------------------------------------------------------------
"We all agree on the necessity of compromise. We just can't agree on when
it's necessary to compromise."  ------Larry Wall
-----------------------------------------------------------------------------------------------------------------------------------
-------------- next part --------------
An HTML attachment was scrubbed...
URL: /pipermail/mp4-tech/attachments/20061018/140dce09/attachment.html