[CELT-dev] Artifacts in One Channel of Stereo C55x Implementation

Jean-Marc Valin jmvalin at jmvalin.ca
Mon Jan 31 19:46:58 PST 2011

I guess the first question is whether you can reproduce the problem on a 
PC with the same code. If not, then the most likely issue is a 16-bit 
integer overflow. CELT *attmpts* to only use the "int" type for values 
that won't overflow a 16-bit int. However, because we have no 16-bit 
platform to test, it's likely that we missed something.



On 11-01-31 03:34 PM, Bob Bang wrote:
> Hi guys,
> I am on a C55x stereo implementation of CELT 0.7.1; I am using 100
> sample frame size and writing 58 Bytes per Packet. At the output of the
> decoder I see one channel reconstructed perfectly, but the other channel
> has random corruption that appears to be a sinusoid with a period of the
> frame size.  The artifact is non-periodic and appears to happen randomly
> during the audio stream.
> Anyone ever run across this? Have any insight?
> thanks
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