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List:       linaro-multimedia
Subject:    [Speex-dev] NEON optimization of speex
From:       jmvalin () jmvalin ! ca (Jean-Marc Valin)
Date:       2011-08-09 12:05:04
Message-ID: 4E412270.3010908 () jmvalin ! ca
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Hi,

Speex does not have bit-exact requirements. It only needs to "sound the
same". For differences down to the LSB, you're pretty safe. For larger
differences you'd need to be able to test more carefully.

	Jean-Marc

On 11-08-09 07:41 AM, Rony Nandy wrote:
> Hi,
> 
> We(Linaro) are evaluating to optimize speex using ARM NEON as an open
> source NEON optimized version is not available. Please let us know if
> someone is already working on it or if some version exists in the open
> source community which we might have missed.
> Secondly,I want to know if bit exactness is mandatory for the NEON
> optimized version with the C only version? and if a lsb mismatch once
> in a while is acceptable?
> 


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