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Discussion Groups | Analog Devices DSPs | convert 2.14 format to 1.15 format

Technical discussions related to Analog Devices DSPs (including Blackfin, TigerSHARC, SHARC and ADSP-21xx DSPs).

  

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convert 2.14 format to 1.15 format - smis...@yahoo.com - Jan 15 10:22:56 2008



Hi 

How to convert the IIR Direct Form1 coefficients in 2.14 format(generated in Matlab ) to 1.15
format so that it can be used in VDSP++ for BF561 Processor ?

Thanks
Smitha


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Re: convert 2.14 format to 1.15 format - Naresh Patel - Jan 16 7:14:07 2008

Hi Smitha,

you can directly use 2.14 format data for data manupulation in any fixed point DSP.If you
directly use 2.14 format and do multipication with 1.15 data then ur answer in also 2.14
format. 

If your 2.14 format coefficients are in range of -1 to 0.999 then you can convert into 1.15 by
arithmetic left shift of one bit.  
Hope this help.

-Naresh
  ----- Original Message ----- 
  From: s...@yahoo.com 
  To: a...@yahoogroups.com 
  Sent: Tuesday, January 15, 2008 1:40 PM
  Subject: [adsp] convert 2.14 format to 1.15 format
  Hi 

  How to convert the IIR Direct Form1 coefficients in 2.14 format(generated in Matlab ) to 1.15
format so that it can be used in VDSP++ for BF561 Processor ?

  Thanks
  Smitha


(You need to be a member of adsp -- send a blank email to adsp-subscribe@yahoogroups.com )