[asterisk-users] g722 question

[Randy R]

On Mon, Dec 7, 2009 at 3:23 PM, Kevin P. Fleming <kpfleming at digium.com> wrote:
> As far as I am aware, for ITU-T compliance the codec only cares about 14
> significant bits, but the reference source code needs those 14 bits in
> the *top* 14 bits of each 16-bit word that it supplies/produces. The
> Asterisk implementation does not do any bit-shifting or masking at all,
> and seems to interoperate with quite a few endpoints just fine, so
> presumably that means it's the correct implementation :-)

Hi Kevin,

Thanks for sharing that. What I found odd was that so many clients got
distortion. It then became apparent that most were using pjsip.
However, since then I spoke to someone who is NOT and they are getting
distortion as well, presumably due to a similar problem.

I've no experience with the Asterisk implementation, even in
pass-though. I've heard that 1.6 can do it, I think.

Best,

Randy