CCIR System D

{{Short description|625-line analog television transmission format}}

CCIR System D is an analog broadcast television system used in Bulgaria, Latvia, Lithuania, Poland, Romania, Slovakia, Czech Republic, Hungary, Albania and the People's Republic of China, Mongolia, Kyrgyzstan, North Korea, Tajikistan, Turkmenistan, Uzbekistan, Armenia, Azerbaijan, Georgia, Kazakhstan, Moldova, Russia, Ukraine and Belarus paired with the PAL/SECAM colour.{{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 |date=30 August 2012 |title=World Analogue Television Standards and Waveforms |url=http://www.pembers.freeserve.co.uk/World-TV-Standards/Transmission-Systems.html#CCIR |url-status=dead |archive-url=https://web.archive.org/web/20120830232230/http://www.pembers.freeserve.co.uk/World-TV-Standards/Transmission-Systems.html#CCIR |archive-date=30 August 2012 |website=}}{{cite web |date=2005 |title=Weltweite Fernsehsysteme (NTSC, PAL und SECAM) |url=http://www.paradiso-design.net/weltweite_fernsehsysteme.html |url-status=dead |archive-url=https://archive.today/20121209040135/http://www.paradiso-design.net/weltweite_fernsehsysteme.html |archive-date=9 December 2012 |access-date=2023-03-06 |website=www.paradiso-design.net}}{{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 |url-status=dead |archive-url=https://archive.today/20121209040135/http://www.paradiso-design.net/weltweite_fernsehsysteme.html |archive-date=9 December 2012 |access-date=2023-06-05 |website=www.paradiso-design.net}}

Initially known as the I.B.T.O. 625-line system this was the first 625-line system, developed by Mark Krivosheev in 1948,{{cite web |url=https://eng.rscc.ru/press/mi-krivosheev-participation-development-mass-tv-br/ |title="M.I. Krivosheev: Participation in the development of mass TV broadcasting" - an exhibition at Ostankino TV Center}}{{cite web |url=https://www.itu.int/en/Pages/Krivocheev.aspx |title=Mark Iosifovich Krivosheev (1922-2018)}} and later associated with the SECAM and PAL color systems. Used on VHF only in most countries, it usually combined with System K on UHF. In China, it is used for both VHF and UHF.{{cite book |title=中华人民共和国国家标准 PAL-D制电视广播技术规范 GB 3174-1995 |date=20 December 1995 |publisher=中国标准出版社 |url=https://openstd.samr.gov.cn/bzgk/gb/newGbInfo?hcno=FD7A8A2096DE24D6957F59E391CA7006 |language=zh-cn}}{{cite book |title=中华人民共和国国家标准有线电视频率配置 GB/T 17786-1999 |date=12 July 1999 |publisher=中国标准出版社 |pages=3–5 |url=https://openstd.samr.gov.cn/bzgk/gb/newGbInfo?hcno=473A2304A56DDC38C669D78F34C12F43 |language=zh-cn}}

Specifications

The general specifications for System D are listed below:{{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

File:VHF Usage.svg

Television channels were arranged as follows:{{cite web |url=http://www.pembers.freeserve.co.uk/World-TV-Standards/Transmission-Systems.html#L-France |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#L-France |archive-date=30 August 2012 |url-status=dead}}{{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}}

class="wikitable" style="text-align: center; border-collapse:collapse"

|+ Original OIR assignments
System D 625 lines

! Channel

! Video carrier (MHz)

! Audio carrier (MHz)

| 41.75

| 48.25

| 49.75

| 56.25

III

| 59.25

| 65.75

| 77.25

| 83.75

| 145.25

| 151.75

| 153.25

| 159.75

| 161.25

| 167.75

| 169.25

| 175.75

| 177.25

| 183.75

| 185.25

| 191.75

| 193.25

| 199.75

| 201.25

| 207.75

| 209.25

| 215.75

class="wikitable" style="text-align: center; border-collapse:collapse"

|+ Assignments since 1965
System D 625 lines

! Channel

! Video carrier (MHz)

! Audio carrier (MHz)

| 49.75

| 56.25

| 59.25

| 65.75

| 77.25

| 83.75

| 85.25

| 91.75

| 93.25

| 99.75

| 175.25

| 181.75

| 183.25

| 189.75

| 191.25

| 197.75

| 199.25

| 205.75

| 207.25

| 213.75

| 215.25

| 221.75

| 223.25

| 229.75

class="wikitable" style="text-align: center; border-collapse:collapse"

|+ Channel arrangement for China (since 1970{{cite web |title=上海广播电视志 |url=https://www.shtong.gov.cn/difangzhi-front/book/detailNew?oneId=1&bookId=4510&parentNodeId=63826&nodeId=12920&type=-1 |website=上海通 |publisher=上海市地方志办公室 |access-date=15 July 2023 |language=zh-cn}})

! Channel

! Frequency range (MHz)

! Video carrier (MHz)

! Audio carrier (MHz)

! DTMB center frequency (MHz)

colspan="5" | Band I

| 48.5 - 56.5

| 49.75

| 56.25

| 52.5

| 56.5 - 64.5

| 57.75

| 64.25

| 60.5

| 64.5 - 72.5

| 65.75

| 72.25

| 68.5

| 76 - 84

| 77.25

| 83.75

| 80

| 84 - 92

| 85.25

| 91.75

| 88

colspan="5" | Band III

| 167 - 175

| 168.25

| 174.25

| 171

| 175 - 183

| 176.25

| 182.75

| 179

| 183 - 191

| 184.25

| 190.75

| 187

| 191 - 199

| 192.25

| 198.75

| 195

| 199 - 207

| 200.25

| 206.75

| 203

| 207 - 215

| 208.25

| 214.75

| 211

| 215 - 223

| 216.25

| 222.75

| 219

class="wikitable" style="text-align:right"

|+ UHF System D arrangement for China

! Ch

! Video (MHz)

! DTMB (MHz)

! Audio (MHz)

| 471.25

| 474

| 477.75

| 479.25

| 482

| 485.75

| 487.25

| 490

| 493.75

| 495.25

| 498

| 501.75

| 503.25

| 506

| 509.75

| 511.25

| 514

| 517.75

| 519.25

| 522

| 525.75

| 527.25

| 530

| 533.75

| 535.25

| 538

| 541.75

| 543.25

| 546

| 549.75

| 551.25

| 554

| 557.75

| 559.25

| 562

| 565.75

| 605.25

| 610

| 611.75

| 613.25

| 618

| 619.75

| 621.25

| 626

| 627.75

| 629.25

| 634

| 635.75

| 637.25

| 642

| 643.75

| 645.25

| 650

| 651.75

| 653.25

| 658

| 659.75

| 661.25

| 666

| 667.75

| 669.25

| 674

| 675.75

| 677.25

| 682

| 683.75

| 685.25

| 690

| 691.75

| 693.25

| 698

| 699.75

| 701.25

| 706

| 707.75

| 709.25

| 714

| 715.75

| 717.25

| 722

| 723.75

| 725.25

| 730

| 731.75

| 733.25

| 738

| 739.75

| 741.25

| 746

| 747.75

| 749.25

| 754

| 755.75

| 757.25

| 762

| 763.75

| 765.25

| 770

| 771.75

| 773.25

| 778

| 779.75

| 781.25

| 786

| 787.75

| 789.25

| 794

| 795.75

| 797.25

| 802

| 803.75

| 805.25

| 810

| 811.75

| 813.25

| 818

| 819.75

| 821.25

| 826

| 827.75

| 829.25

| 834

| 835.75

| 837.25

| 842

| 843.75

| 845.25

| 850

| 851.75

| 853.25

| 858

| 859.75

| 861.25

| 866

| 867.75

| 871.25

| 874

| 877.75

| 879.25

| 882

| 885.75

| 887.25

| 890

| 893.75

| 895.25

| 898

| 901.75

| 903.25

| 906

| 909.75

The original assignments of channels 25 to 57 were 2 MHz higher in frequency until c.1984. Channels 58 to 62 were deleted at this time.

References

External links

[https://www.itu.int/dms_pub/itu-r/opb/rep/R-REP-BT.624-4-1990-PDF-E.pdf ITU, Characteristics of television systems]
[https://web.archive.org/web/20120830232230/http://www.pembers.freeserve.co.uk/World-TV-Standards/Transmission-Systems.html World Analogue Television Standards and Waveforms]

Category:ITU-R recommendations

Category:Television technology

Category:Video formats

Category:Broadcast engineering

Category:CCIR System

Category:Television in the Soviet Union

CCIR System D

Specifications

See also

References

External links