|L1H0H1H0|L1H0H1H0|L1H0H1H0|L1H0H1H0| : level 1
In this method, H/L and X0/X1 is always same position.
- This lead us to more speed and less memory.
+ This leads us to more speed and less memory.
Of cause, the result of both method is quite same
because it's only difference that coefficient position.
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