Rec. 2020
ITU-R BT.2020 Color Space
A wide color gamut standard for UHD/4K video, covering 75% of the visible color spectrum versus 36% for Rec. 709.
Chi tiết kỹ thuật
Video rec. 2020 follows standard aspect ratios: 1920x1080 (1080p/FHD), 2560x1440 (1440p/QHD), 3840x2160 (4K/UHD). Bitrate requirements scale roughly with pixel count — 4K at equivalent quality needs ~4x the bitrate of 1080p. For web delivery, adaptive bitrate streaming (HLS/DASH) serves multiple quality levels based on network conditions. Most viewers watch on mobile screens where differences above 1080p are imperceptible, making 1080p the sweet spot for web video delivery.
Ví dụ
``` Video resolution standards: Resolution Pixels Typical Bitrate ───────────────────────────────────────────── 480p (SD) 854×480 1.5-2.5 Mbps 720p (HD) 1280×720 2.5-5 Mbps 1080p (FHD) 1920×1080 5-10 Mbps 1440p (QHD) 2560×1440 10-15 Mbps 4K (UHD) 3840×2160 15-30 Mbps ```
Công cụ liên quan
R
Resolution Reference
B
Bitrate Calculator
F
Frame Rate Converter
T
Timecode Calculator
A
Aspect Ratio Calculator
F
File Size Estimator
S
Speed & Slow-Mo Calculator
S
Storage Planner
S
Subtitle Time Converter
B
Bandwidth Calculator
C
Color Space Reference
C
Codec Reference
P
Platform Specs Guide
C
Chroma Subsampling Guide
S
Screen Recording Guide