[Mp4-tech] A question about quantization

[Guogang Hua]

Dear all,
  I am trying the H.264 4X4 and 8X8 DCT tranformation and quantization. I just code all frame as I frame. When the QP is large, the decoded pictures have a right shift and the shift is becoming large and large with the frame number increasing. When QP is small, no this kind of problem.
  So what's the problem? of is it normal due to the phase shift of DCT?
  Thanks!
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