Jitter
Definition
Jitter refers to the temporal variation of delays, for example in network packets or real-time processing.
Not only average latency matters: uneven arrival times can disrupt audio, video, streaming, and interactive systems. Measurement definitions differ depending on protocol and context.
Simply explained
Like a bus that is on average on time but sometimes has 1 and sometimes 20 minutes gap to the schedule.
Why it matters in practice
Relevant for voicebots, real-time communication, streaming, and APIs with time-critical requirements.
Example from business
A voice assistant has acceptable average network latency, but strong fluctuations cause dropouts and unnatural conversation pauses.
Limits and pitfalls
- Equating jitter with latency; considering only averages; mixing network and application jitter.
Origin & history
The IETF standardized metrics for IP Packet Delay Variation among others in RFC 3393; real-time protocols use their own jitter definitions.
Use in mid-sized companies
- Possible applications: real-time audio, video, WebRTC, voicebots, and distributed systems.
Frequently asked questions
Can low average latency still have bad jitter?
Yes. Is jitter always a network problem? No, scheduling or processing can also cause fluctuations.
Sources
- IP Packet Delay Variation Metric · RFC 3393, IP Packet Delay Variation Metric
Sources checked on 10.10.2026.
Editorially reviewed on: