Re: [codec] #14: VAD and CNG?

["Christian Hoene" <[e-mail]>]

Hi Benjamin,


>In general, parameters for bitrate, jitter buffer, sample rate, filtering, and AEC are not exposed to
>the user.  They are typically managed according to some customized algorithm designed for the
>hardware, network, and application.  DTX is just one more of these settings, and would be no more
>likely to be exposed to the user.  We don't need to worry about the user interface, because in most
>cases there won't be one.

Actually, I meant two kind of users: Those of the phone and those of the codec.
>
>I think it's a good idea for the reference implementation to provide some intelligent heuristics for
>use of DTX, but these heuristics should not be a requirement of any RFC.

Yes, you are true. But we must be precise. The requirement for some heuristics on how to set those parameters MUST be part of the
requirements document. However, the heuristics NEED NOT to be implemented in every phone but the implementer CAN choose any superior
algorithm to optimize particular application needs. Thus, a heuristic on how to select DTX should only ensure some minimal system
quality.

Christian

>
>--Ben