[M4IF Technotes] Deblocking filter

[Patrick Ng]

Dear MPEG-4 experts,
In the case of Reduced Resolution VOP mode, in the MPEG-4 spec., it says
"Block Boundary filtering shall be performed along the edges of the 16x16
reconstructed block data.......The filtering is performed on the complete
reconstructed VOP data before storing the data in the frame memory for
future prediction."
If another deblocking filter is to be implemented at the decoder as a
post-processing operation, should it be bypassed in Reduced Resolution VOP
mode to avoid double filtering?  If not, since the deblocking filter
operates along the 8x8 block edges while the block size in Reduced
Resolution is 16x16, would the filtering create undesirable effect within a
decoded block in Reduced Resolution?
Thanks
Patrick Ng
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