showstack / glossary / frame-rate
Frame rate 影格率
How many complete images a video signal carries per second. On a show it is a system-wide decision, not a per-device one: content, playback, switcher, processor, LED wall and camera all have to agree, or something judders.
中文
影像訊號每秒傳送的完整畫面數。在演出中這是全系統的決定而非單機設定：內容、播放、切換台、處理器、LED 屏與攝影機必須一致，否則某處會出現跳動。
Regional usage
| Where | Term | Note |
|---|---|---|
| UK / US | Frame rate / fps | |
| HK | 幀率 | |
| TW | 影格率 |
Easy to get wrong
29.97 and 30 are not the same, and 23.976 is not 24. The 1000/1001 pull-down is where drifting timecode and rejected content files come from.
Next to this
Where it shows up on the wire
LTCSMPTE time and control code encoded as a biphase-mark audio signal, 80 bits per frame, so it runs down any au…Genlock / Black BurstAn analog composite video reference signal (a 'black' picture with color burst) distributed over coax to lock…
Sources
- SMPTE ST 12-1 time and control code — SMPTE primary
Understand the mechanism
Something wrong, or missing?
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