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Media Performance Data

The 

Spacevars
0 series4

system monitors the packet loss and jitter exceeding the jitter buffers capacity using the playout time series. The playout time series consists of 31 quality measurements, with each measurement representing a consecutive time period. Taken as a whole, the measurements represent how the playout buffer viewed the jitter and packet loss over consecutive time periods. Within each time period the quality is classified into four possible values:

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Excerpt

Caption 0 Table 1 Playout Buffer Sizing Chart Codec Playout Buffer Length (ms) Number of Frames Frame Size (bytes) Total Size (bytes) G.711 200400 2040 80 16003200 G.711 Side B 100400 1040 80 8003200 G.726 400 40 60 2400 G.729 500 50 10 500 G.723 1500 50 24 1200 iLBC 20ms 500 20 50 950 iLBC 30ms 600 25 32 1000 AMR/EFR 500 25 32 875 EVRC/EVRC-B 500 25 22 550 G.722 400 2040 80 16003200 G.722.1 400 20 80 1600 G.722.2 400 20 62 1230 Opus 400 40 300 12000

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• Calculate the duration of the percentages of the 20-second period:
• • 1 percent of 20 seconds = 0.2 seconds (200msec200 msec)
  • 2 percent of 20 seconds = 0.4 seconds (400msec400 msec)
• Assign these values (in milliseconds) to playoutTimeseriesThreshold1 and playoutTimeseriesThreshold2. The playoutTimeseriesThreshold0 is generally set to 0 (default).

The following CLI commands illustrate the example above.

Code Block
language none
% set system dspPad playoutTimeseriesPeriod 20000 % set system dspPad playoutTimeseriesThreshold1 200 % set system dspPad playoutTimeseriesThreshold12 400

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