VF bandwidth

Video bandwidth in telecommunication

In broadcast television systems, VF bandwidth, video bandwidth or more formally video frequency bandwidth is the range of frequencies between 0 and the highest frequency used to transmit a live television image. The maximum frequency can be found by multiplying three figures; the number of frames (images) per second, number of lines per frame and maximum number of sine periods per line. In the table below number of frames per second, number of lines per frame and the video band width in different systems are shown.[1]

Name of the systems No of frames per second No of lines per frame Video bandwidth, MHz.
A 25 405 3
B-C-G-H 25 625 5
D-K-L 25 625 6
E 25 819 10
M-J 30 525 4.2
N 25 625 4.2

References

  1. ^ Reference Data for Radio Engineers, Howard W.Sams Co., Inc, ISBN 0-672-21218-8, sec. 30, p. 33
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Broadcast video formats
Television
Analog
405 lines
  • System A
525 lines
  • System M
  • Color systems: NTSC, NTSC-J, Clear-Vision, PAL-M
  • B-MAC
625 lines
819 lines
1125 lines
1250 lines
Audio
Hidden signals
Historical
Digital
Interlaced
Progressive
MPEG-2 Video
AVS
AVS+[note 1]
MPEG-4 Visual
MPEG-4 AVC
AVS2[note 1]
MPEG-H HEVC
Audio
Hidden signals
  1. ^ a b Also used in China's DVB-S/S2 network.
  2. ^ a b Defunct.
Technical issues
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Systems
Color systems
Video
Sound
Modulation
Transmission
Frequencies & bands
Propagation
Testing
Artifacts