CCIR System K#System K1
{{Short description|625-line analog television transmission format}}
CCIR System K is an analog broadcast television system used in countries that adopted CCIR System D on VHF, and in Benin, Guinea, Republic of the Congo, Togo, Senegal, Burkina Faso, Burundi, Ivory Coast, Gabon, Comoros, Democratic Republic of the Congo, Madagascar, Mali, Nigeria, Réunion, Rwanda, Chad, Central African Republic, French Polynesia, New Caledonia, Wallis and Futuna, Guadeloupe, Martinique, Saint Pierre and Miquelon and French Guiana.
It is identical System D in most respects.{{cite book |url=https://www.itu.int/dms_pub/itu-r/opb/rep/R-REP-BT.624-4-1990-PDF-E.pdf |title=Report 624-4 Characteristics of television systems |publisher=UIT |year=1990}}{{cite web |url=http://www.pembers.freeserve.co.uk/World-TV-Standards/Transmission-Systems.html#GHIKK1L |title=World Analogue Television Standards and Waveforms |website=www.pembers.freeserve.co.uk |access-date=12 January 2022 |archive-url=https://web.archive.org/web/20120830232230/http://www.pembers.freeserve.co.uk/World-TV-Standards/Transmission-Systems.html#GHIKK1L |archive-date=30 August 2012 |url-status=dead}}{{cite web |last=Amadeus Trappe |first=Raffael |date=2005 |title=Weltweite Fernsehsysteme (NTSC, PAL und SECAM) |url=http://www.paradiso-design.net/weltweite_fernsehsysteme.html |archive-url=https://archive.today/20121209040135/http://www.paradiso-design.net/weltweite_fernsehsysteme.html |url-status=dead |archive-date=December 9, 2012 |access-date=2023-06-05 |website=www.paradiso-design.net}} Used only for UHF frequencies, its paired with SECAM or PAL color systems.
Specifications
Some of the important specs are listed below:Reference Data for Radio Engineers, ITT Howard W.Sams Co., New York, 1977, section 30{{cite web |date=2007-05-15 |title=World Analogue Television Standards and Waveforms |url=http://www.pembers.freeserve.co.uk/World-TV-Standards/Transmission-Systems.html#CCIR |access-date=2023-04-13 |archive-url=https://web.archive.org/web/20070515044128/http://www.pembers.freeserve.co.uk/World-TV-Standards/Transmission-Systems.html#CCIR |archive-date=2007-05-15}}
- Frame rate: 25 Hz
- Interlace: 2/1
- Field rate: 50 Hz
- Lines/frame: 625
- Line rate: 15.625 kHz
- Visual bandwidth: 6 MHz
- Vision modulation: Negative
- Preemphasis: 50 μs
- Sound modulation: FM
- Sound offset: +6.5 MHz
- Channel bandwidth: 8 MHz
Television channels were arranged as follows:
| class="wikitable" style="text-align: center; border-collapse:collapse"
|+ System K UHF channels ! Channel ! Video carrier (MHz) ! Audio carrier (MHz) |
| 21
| 471.25 | 477.75 |
| 22
| 479.25 | 485.75 |
| 23
| 487.25 | 493.75 |
| 24
| 495.25 | 501.75 |
| 25
| 503.25 | 509.75 |
| 26
| 511.25 | 517.75 |
| 27
| 519.25 | 525.75 |
| 28
| 527.25 | 533.75 |
| 29
| 535.25 | 541.75 |
| 30
| 543.25 | 549.75 |
| 31
| 551.25 | 557.75 |
| 32
| 559.25 | 565.75 |
| 33
| 567.25 | 573.75 |
| 34
| 575.25 | 581.75 |
| 35
| 583.25 | 589.75 |
| 36
| 591.25 | 597.75 |
| 37
| 599.25 | 605.75 |
| 38
| 607.25 | 613.75 |
| 39
| 615.25 | 621.75 |
| 40
| 623.25 | 629.75 |
| 41
| 631.25 | 637.75 |
| 42
| 639.25 | 645.75 |
| 43
| 647.25 | 653.75 |
| 44
| 655.25 | 661.75 |
| 45
| 663.25 | 669.75 |
| 46
| 671.25 | 677.75 |
| 47
| 679.25 | 685.75 |
| 48
| 687.25 | 693.75 |
| 49
| 695.25 | 701.75 |
| 50
| 703.25 | 709.75 |
| 51
| 711.25 | 717.75 |
| 52
| 719.25 | 725.75 |
| 53
| 727.25 | 733.75 |
| 54
| 735.25 | 741.75 |
| 55
| 743.25 | 749.75 |
| 56
| 751.25 | 757.75 |
| 57
| 759.25 | 765.75 |
| 58
| 767.25 | 773.75 |
| 59
| 775.25 | 781.75 |
| 60
| 783.25 | 789.75 |
| 61
| 791.25 | 797.75 |
| 62
| 799.25 | 805.75 |
| 63
| 807.25 | 813.75 |
| 64
| 815.25 | 821.75 |
| 65
| 823.25 | 829.75 |
| 66
| 831.25 | 837.75 |
| 67
| 839.25 | 845.75 |
| 68
| 847.25 | 853.75 |
| 69
| 855.25 | 861.75 |
System K1
French overseas departments and territories used a variation named System K1 for broadcast in VHF.{{cite web |url=http://www.pembers.freeserve.co.uk/World-TV-Standards/Transmission-Systems.html#K1 |title=World Analogue Television Standards and Waveforms |website=www.pembers.freeserve.co.uk |access-date=12 January 2022 |archive-url=https://web.archive.org/web/20120830232230/http://www.pembers.freeserve.co.uk/World-TV-Standards/Transmission-Systems.html#K1 |archive-date=30 August 2012 |url-status=dead}} UHF channels were similar to K.
| class="wikitable" style="text-align: center; border-collapse:collapse"
|+ System K1 VHF channels ! Channel ! Video carrier (MHz) ! Audio carrier (MHz) |
| 2
| 52.25 | 58.75 |
| 3
| 60.25 | 66.75 |
| 4
| 175.25 | 181.75 |
| 5
| 183.25 | 189.75 |
| 6
| 191.25 | 197.75 |
| 7
| 199.25 | 205.75 |
| 8
| 207.25 | 213.75 |
| 9
| 215.25 | 221.75 |
| 10
| 223.25 | 229.75 |
See also
Notes and references
{{reflist}}
External links
- [https://web.archive.org/web/20120830232230/http://www.pembers.freeserve.co.uk/World-TV-Standards/Transmission-Systems.html World Analogue Television Standards and Waveforms]
- [https://archive.today/20121209040135/http://www.paradiso-design.net/weltweite_fernsehsysteme.html Fernsehnormen aller Staaten und Gebiete der Welt]
{{Video formats}}
{{Analogue TV transmitter topics}}
Category:ITU-R recommendations
Category:Television technology