Jitter Buffer Considerations for Simulcast and Non-Simulcast

The MLC 8000 devices implement jitter buffers used to receive audio transmitted between the MLC 8000 Analog Comparator and the MLC 8000 Subsite Link Converter. The Ethernet link between the two devices carries G.711 encoded audio to and from the RF Site.

• In a Non-Simulcast operation, both devices require that their inbound jitter buffers be configured to compensate for network delay variation.
• In Simulcast operation, jitter buffer is not necessary at the MLC 8000 Subsite Link Converter because it receives a Simulcast Launch Time from the MLC 8000 Analog Comparator that already compensates for the network delay variation.

In Non-Simulcast configurations, the network jitter (IPDV) impacts the MLC 8000 Link Converter jitter buffer per MLC 8000 Subsite Link Converter Jitter Buffer Settings.

The MLC 8000 Analog Comparator jitter buffer is used for Simulcast or Non-Simulcast operation and is shown in MLC 8000 Analog Comparator Jitter Buffer Settings.

In a typical example, use the greatest value observed for the network delay variation, which is 20 ms, to determine the optimal jitter buffer size for the MLC 8000 Analog Comparator and for the MLC 8000 Subsite Link Converter as 40 ms. The jitter buffers on each of the MLC 8000 devices are configured with the same value for their respective jitter buffers.

The MLC 8000 devices can be configured with the settings in the following tables.