In the case of the adaptive jitter buffer, the average delay is automatically readjusted. The aim of this is to achieve a good balance between having the shortest possible average delay on the one hand and the lowest possible packet loss on the other.

You can set which of these factors is attributed more importance using the “Preference Parameter“. Using values from 0 to 8, you can specify whether decreasing the delay or avoiding packet loss should be prioritized when calculating the average delay. In this case, 0 denotes “Avoid packet loss as far as possible“ and 8 denotes “Maintain shortest possible average delay“. An average value (4) is predefined.

Rule of thumb: setting the value to 0 results in approx. 10 ms longer average delay and setting it to 8 results in approx. 10 ms shorter average delay than that applicable when the average value is set to 4.