[Mp4-tech][Video][H.264] (Xu Ke)

[AngelZhang innosis.com.cn]

hi,Xu Ke
  I am study the part of inter prediction in these days. following if my
idea about your question,wish it useful to you.
  and i think the first conception of yours about mv's quarter-sample
accuracy is right. for in the encoder,MV's value is calculate by MC in
which interpolation is used.
  The second question of yours confused me,too. and it seems that Hadmard
transform hasn't been used in the encoder but just used in the decoding
process. then the purpose of the hadmard is to reduce possible correlation
between DC coeffs which has bigger value. then as far as MB with 4*4
mode,it maybe unnecessary used Hadmard because of small correlation between
MB.
  I don't know whether my opinions are right, wish experts give further
explainations.
thanks a lot!
best regards
angel