Jitter Buffer
Enter jitter, packetization and latencies and I compute the recommended jitter-buffer depth, packets queued and total mouth-to-ear latency, rated with the G.114 threshold (≤150 ms good).
Buffer depth
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Packets queued
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Mouth-to-ear latency
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Buffer —
Packets —
Mouth-to-ear —
ITU-T G.114 rating
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Mouth-to-ear delay breakdown
| Component | ms | % |
|---|
How it is computed · buffer, packets and G.114
1. Buffer depth:
k × jitter, with a floor of 2 packets
(2 × ptime). With k = 2 the buffer absorbs
twice the observed jitter.
2. Packets queued:
ceil(depth / ptime). The buffer fills with whole frames,
so it rounds up.
3. The buffer adds its depth as fixed
delay. Mouth-to-ear latency
= network one-way + buffer + codec + ptime.
4. ITU-T G.114 (one-way delay):
≤ 150 ms good, 150–400 ms acceptable,
> 400 ms poor for most voice applications.
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