Adrian Hey <ahey@NoSpicedHam.iee.org> wrote in news:arqdnSKd-
aMY237dRVn_iw@nildram.net:
> www.itu.int
Thanks Adrian,
Actually, I found out that you can download three publications for free.
--
Al Clark
Danville Signal Processing, Inc.
--------------------------------------------------------------------
comp.dsp conference July 28 - Aug 1, 2004
details at http://www.danvillesignal.com/index.php?id=compdsp
email: compdsp@danvillesignal.com
Who says you can't teach an old dog a new DSP trick?
Reply by Adrian Hey●June 30, 20042004-06-30
Al Clark wrote:
> We have an application that uses a sub band ADPCM (G.722) coder and
> decoder. Our goal is data reduction with good quality, minimal computation
> overhead and extended speech bandwidth. We chose G.722 because we didn't
> want to reinvent the wheel and it appeared to be a good candidate.
>
> We have several examples in C (Embree) and asm (ADI 21xx) and none of them
> give answers that make sense (at least to us).
> For example, if we input a 4K sequence (.5,0,-.5,0), we get nothing
> similar out.
>
> I understand that there is some kind of test sequence available that we
> could use as a sanity check. I don't have a copy of the standard. Does
> anyone have this sequence?
>
> Any suggestions?
You can get the test documentation and sequences from www.itu.int for
a small fee of 52 CHF. You want to look for G.722 Appendix II.
Regards
--
Adrian Hey
Reply by Al Clark●June 30, 20042004-06-30
We have an application that uses a sub band ADPCM (G.722) coder and
decoder. Our goal is data reduction with good quality, minimal computation
overhead and extended speech bandwidth. We chose G.722 because we didn't
want to reinvent the wheel and it appeared to be a good candidate.
We have several examples in C (Embree) and asm (ADI 21xx) and none of them
give answers that make sense (at least to us).
For example, if we input a 4K sequence (.5,0,-.5,0), we get nothing similar
out.
I understand that there is some kind of test sequence available that we
could use as a sanity check. I don't have a copy of the standard. Does
anyone have this sequence?
Any suggestions?
--
Al Clark
Danville Signal Processing, Inc.
--------------------------------------------------------------------
comp.dsp conference July 28 - Aug 1, 2004
details at http://www.danvillesignal.com/index.php?id=compdsp
email: compdsp@danvillesignal.com
Who says you can't teach an old dog a new DSP trick?