Re[4]: III_requantize() accuracy

Hello Tony,

Friday, March 26, 2004, 2:53:52 PM, you wrote:
TF>  With 16 bit implementation on TI55x how much accuracy you
TF> got? And how much accuracy improvement was there by changing the
TF> multiplication into 4.28 by 1.31 instead of 4.28 by 4.28 used in
TF> MAD decoder?

According to
http://www.underbit.com/resources/mpeg/audio/compliance/

in best case limited accuracy is achieved.
But in worst case ... rms still C*10^-4 but C - is bigger than limited
accuracy require.

4.28x1.31 - I just have to use this one :) This is 3DSP hardware
dependent - in another case - like 4.28x4.28 I need to do additional
actions... So almost in all places decoder use constants less than 1.0
Only in synthesis part some of them are bigger than 1.
But now I am working under synthesis and I am looking in way where
constant which are bigger than 1 will be split on 2 part.

After I finish decoder we can measure accuracy :).

-- 
Best regards,
 Grigory                            mailto:[email protected]