[Speex-dev] NB decode in SB
Jean-Marc.Valin at USherbrooke.ca
Wed Jun 22 16:11:55 PDT 2005
Why not add a bit of signalling? I'm still not sure I understand your
exact question. The narrowband decoder does not know the whether it's
getting called by the wideband decoder. However, given the bit-stream,
it's possible to know whether it has wideband info without decoding.
Does that answer?
Le lundi 20 juin 2005 à 08:23 -0400, Fritz Koenig a écrit :
> Because a wideband signal has both a narrowband part and a wideband part
> the first part of the wideband decode is to call the narrowband decode.
> In the fixed point version the signal generated from the narrowband
> decode is downshifted at the end. In this same version the wideband
> then upshifts the signal by the same amount.
> I would like to do away with the downshift on the narrowband side and
> the upshift on the wideband side and just past the decoded signal
> through. To do this and allow for the decoding of narrowband only
> signals I need to detect who the calling function is to the narrowband
> What I was wondering is if there was already a member variable that held
> the current decode state.
> Jean-Marc Valin wrote:
> >Could you explain a bit more what your question is?
> > Jean-Marc
> >Selon Fritz Koenig <fkoenig at on2.com>:
> >>Is there a way to tell during the NB decode if it was kicked off by the
> >>SB decode? I would like to avoid saturating and packing the output of
> >>the NB decode, only to unpack it for the SB.
> >>Speex-dev mailing list
> >>Speex-dev at xiph.org
> Speex-dev mailing list
> Speex-dev at xiph.org
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