Yaowu Xu efa9abd028 optmized rounding for transforms
the changes are still temporary, the final transforms, especially
inverse ones should take in account both accuracy, complexity, and
sign-bias, which should be decided at a later time.

Change-Id: I116b0c70b25f5ee324ae5713d4564f5d0aa27151
2012-02-16 07:03:57 -08:00
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