[CELT-dev] Celt over RTP

[Alexandre Savard]

Hi, 

we are currently implementing Celt codec into SFLphone, a sip/iax
softphone.

Sound quality seems to be good. However, we are experiencing an
important latency, which makes small segments of sound to be interleaved
with blanks.

1 channel of compressed audio data packets are sent using a fixed frame
size of 512 samples at 44100 Hz, using a 128 byte-per-packets
compression.

Could this delay be due to an algorithmic latency? Changing Thread speed
(sleep 1 - 8 ms) seemed to have no influence on the result.

Is there a way to optimize celt parameters so that it can be sent using
rtp? We will give it a try at a lower sampling rate, 32 kH.


Congratulation, great work with this project.

Thanks

Alexandre Savard