showstack / glossary / latency
Latency 延遲
The time between something happening and the system showing or sounding it. Every conversion, network hop, scaler, processor and wireless link adds some, and it accumulates down a chain until a video wall no longer matches the PA and a performer no longer trusts their monitor.
中文
事件發生到系統呈現出來之間的時間差。每一次轉換、網路跳躍、縮放、處理與無線傳輸都會增加延遲，沿著訊號鏈累積，直到影像牆與 PA 不再同步、表演者不再信任自己的監聽。
Regional usage
| Where | Term | Note |
|---|---|---|
| UK / US | Latency / delay | |
| HK / TW | 延遲 |
Easy to get wrong
Audio and video latency are budgeted separately and then have to be reconciled. Fixing lip sync by delaying the audio can push the performer monitor feed past what they can play to.
Next to this
Time alignment時間對齊Delaying the earlier-arriving loudspeaker so that sound from two sources reaches the listener together. Appli…Skew時間偏差The gap in arrival time between signals that are supposed to land together. On a parallel bus, skew is why wi…
Where it shows up on the wire
DanteAudinate's proprietary audio-over-IP system carrying uncompressed multichannel audio, clocking and device con…NDIVizrt's video-over-IP protocol carrying compressed video, audio and metadata between applications and devices…SMPTE ST 2110A suite of SMPTE standards for carrying uncompressed video, audio and ancillary data as separate RTP streams …
Sources
- Theatrecrafts glossary of technical theatre terms — Theatrecrafts / ABTT heritage primary
Understand the mechanism
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