[gst-devel] comfort noise generation bin

[pl bossart]

>> > So maybe another solution is needed, like having the decoder generate
>> > a
>> > comfort noise buffer when they receive a "GstRTPPacketLost" event from
>> > the jitterbuffer (which should be only sent to the last active payload
>> > type per SSRC). My understanding is that the decoder should only
>> > generate CN after their receive one SID frame until another voice
>> > frame
>> > is received. That said, this solution means that in a multi-party
>> > call,
>> > one would get CN.
>>
>>   You might be able to do this without resorting to a new event, but
>> instead by having the jitterbuffer send new new-segments which is the
>> technique we also use for sparse streams (i.e. the decoder sees a
>> new-segment, knows that no data is available until a certain point and
>> therefore pushes out comfort noise up to the new start position).
>
> Are you suggesting we have the jitterbuffer resend a newsegment event
> every 20 or 30 ms ? Btw, that "GstRTPPacketLost" already exists in the
> jitterbuffer.

SID and Packet losses are orthogonal concepts, this approach will not
fly. SID is used to reduce the bandwidth when the Voice Activity
Detection (VAD) on the transmitter side doesn't detect any speech to
transmit. You can have regular or SID frames, and packet losses for
both types for frames.
- Pierre