292
Genie Distribution User Manual v1.6
© Tieline Pty. Ltd. 2015
Connection
Jitter-Buffer Recommendation
Private LAN
60 milliseconds
Local
100 - 200 milliseconds
National
100 - 300 milliseconds
International
100 – 400 milliseconds
Wireless Network
250 - 750 milliseconds
Satellite IP
500 - 999 milliseconds
Important Note:
The preceding table assumes Tieline Music is the algorithm in use. Do
not use PCM (uncompressed) audio over highly contended DSL/ADSL connections
without enough bandwidth to support the high connection bit rates required.
26.4
Configuring Forward Error Correction
Forward Error Correction (FEC) is designed to increase the stability of UDP/IP connections in the
event that data packets are lost. FEC works by sending a secondary stream of audio packets over
a connection so that if your primary audio stream packets are lost or corrupted, then packets from
the secondary stream can be substituted to replace them. The amount of FEC required depends on
the number of data packets lost over the IP connection.
Both the local and remote codec FEC settings can be configured in your codec before dialing.
These settings can also be changed ‘on the run’ while the codecs are connected. FEC should only
be used if the Send/Return link quality percentage displayed on the codec is below 99, as it is of no
benefit otherwise.
Programming FEC into the Codec
1. Press the
HOME
button to return to the
Home
screen.
2. Use the navigation buttons on the front panel to select
Connect
and press the
button.
3. Select
IP
and press the
button.
4. Select
Tieline
and press the
button.
5. Use the down
navigation button to select
Setup
and press the
button.
6. Navigate to
FEC
and press
.
7. Select the local codec FEC setting in the
Local FEC
screen and press
.
8. Select the remote codec FEC setting in the
Remote FEC
screen and press
.
The four FEC settings in Tieline codecs are outlined in the following table with their bit rate ratios.