[Mp4-tech] Residual coefficients resolution

[K. G Srinidhi]

All,
We've been trying to calculate the number of bits required to represent the transform and quantized coefficients. From what we could calculate, it seems like 12 bits should suffice, at least in the case of 4x4 transform. Is this correct? 
What about the 8x8 transform? Is 12 bits valid there as well?
Thanks,
Srinidhi
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