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Ch 15 Video Concept and Terminology
Different video standard worldwide.
576 lines
25 fps
PAL TV System
lines
fps
NTSC TV System
525
29.97
Frame Rate
With higher frame rate, the number of frames created is more, making pictures smoother.
Higher Frame RateLower Frame Rate
Interlacing
12345678
Line Scan order : 1 3 5 7 ….. 2 4 6 8 ….
Progressive
12345678
Line Scan order : 1 2 3 4 5 6 7 8 ….
Different Video Resolution
HDTV vs SDTV
HDTV SDTV
Screen with different aspect ratio
Aspect Ratio 16:9
16
9
Aspect Ratio 4:3
4
3
Bit rate: VCD 1Mbit/s
Bit rate: DVD 5Mbit/s
Bit rate: HDTV 20Mbit/s
Digital Television in Hong Kong
Digital Television in Hong Kong
MHEG-5 technology for providing interactive features.