[Mp4-tech] How does block size is decided while encoding.

[tummala kalyani]

Hi all,
The standard says H.264 supports variable block size encoding. Each
macro block can be divided into a maximum of 16 blocks. On what
criteria the block sizes in a block is chosen. Can any one clear my
doubt?
Thanx in advance
-- 
Kalyani Tummala
IIT Kharagpur - 721302