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Basic Standards for TV transmission

STANDARD
UNIT B/G
CCIR
D/K
OIRT
H
BELGIUM
I
UK
K1 or K
FOPTA*
L
FRANCE
M
FCC
N
SOUTH AFRICA
 
Frequency   VHF/UHF VHF/UHF UHF VHF/UHF VHF/UHF VHF/UHF VHF/UHF VHF/UHF
Number of lines for frame   625 625 625 625 625 625 525 625
Field frquency Hz 50 50 50 50 50 50 60 50
Line frequency Hz 15625 15625 15625 15625 15625 15625 15750 15625
Duration of the sync pulse μs 4.7 4.7 4.7 4.7 4.7 4.7 5 (4.7)2 5
Duration of the blanking pulse μs 12 12 12 12 12 12 10.8(11)2 10.9
Front porch μs 1.5 1.5 1.5 1.5 1.5 1.5 1.9 (1.75)2 1.9
Field blanking interval Lines 25 25 25 25 25 25 19 to 21 19 to 21
Standard color system   PAL/SECAM SECAM PAL/SECAM PAL SECAM SECAM PAL/NTSC PAL
Chrominance subcarrier freq. Hz                
PAL Hz 4433618.75±5   4433618.75±5 4433618.75±5     3575611.49±10 3582056.25±5
SECAM/NTSC Hz

KHz
 
fOR=4406250±2000
fOB=4250000±2000
fO=4286±20
fOR=282fH fOB=272fF
fOR=4406250±2000
fOB=4250000±2000
fO=4286±20
fOR=282fH fOB=272fF
fOR=4406250±2000
fOB=4250000±2000
fO=4286±20
fOR=282fH fOB=272fF
  fOR=4406250±2000
fOB=4250000±2000
fO=4286±20
fOR=282fH fOB=272fF
fOR=4406250±2000
fOB=4250000±2000
fO=4286±20
fOR=282fH fOB=272fF
3579545±10  
Video bandwidth MHz 5 6 5 5.5 6 6 4.2 4.2
RF channel width MHz 7(B) / 8 (G) 8 8 8 8 8 6 6
Vision-sound carrier spacing MHz +5.5 +5.746 +6.5 +5.5 +6 +6.5 ±6.5 +4.5 +4.5
Width of vestigial sideband MHz 0.75 0.75 1.25 1.25 1.25 1.25 0.75 0.75
Spacing of vision from nearest edge of channel MHz +1.25 +1.25 +1.25 +1.25 +1.25 +1.25 +1.25 +1.25
RF sync level % 100 100 100 100 100 <6 100 100
RF blanking level % 733 75 75 76 75 30 75 75
RF white level (residual carrier) % 10 12.5 10 20 10 100 (110)2 10 10
Type of vision modulation   C3F neg. C3F neg. C3F neg. C3F neg. C3F neg. C3F pos. C3F neg. C3F neg.
Type of sound modulation   F3E F3EH6 F3E F3E F3E F3E A3E F3E F3E
Frequency deviation   ±50 ±50 ±50 ±50 ±50 - ±25 ±25
Preemphasis μs 50 50 50 50 50 - 75 75
Vision/Sound power ratio   10:1 to 20:14 20:1:0.26 10:1 to 5:1 5:1 to 10:1 5:1 10:1 10:1 10:1 to 5:15 10:1 to 5:1
* = group of territories represented by the French Overseas Post and Telecommunications Agency
2 = for color transmission according to NTSC or SECAM
3 = 73% instead of nominal 75% applies for TV transmitters of high quality also in sync range (burst, chrominance signal)
4 = 20:1 in the Federal Republic of Germany as of April 1976 for all transmittions of the three programs
5 = 6.7:1 and 2.9:1 in Japan
6 = for dual-sound or stereo sound in the Federal Republic of Germany
 
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