CCIR System D

CCIR System D is an analog broadcast television system used in the Commonwealth of Independent States, parts of Eastern Europe and People's Republic of China.[1][2]

Initially known as the I.B.T.O. 625-line system this was the first 625-line system, developed by Mark Iosifovich Krivosheev in 1948,[3][4] and later associated with the SECAM and PAL color systems. Used on VHF only in most countries, it's usually combined with system K on UHF. In China it is used for both VHF and UHF.

Specifications

Some of the important specs are listed below:

System D specifications
Frame rate Interlace Field rate Line/frame Line rate Visual b/w Vision mod. Preemphasis Sound mod. Sound offset Channel b/w
252/150625156256 MHz.Neg.FM+6.5 MHz.8 MHz.
Plan showing VHF frequency ranges for ITU Systems

Television channels were arranged as follows:[5][6]

Original OIR assignments
System D 625 lines
ChannelVideo carrier (MHz)Audio carrier (MHz)
I41.7548.25
II49.7556.25
III59.2565.75
IV77.2583.75
1145.25151.75
2153.25159.75
3161.25167.75
4169.25175.75
5177.25183.75
6185.25191.75
7193.25199.75
8201.25207.75
9209.25215.75
Assignments since 1965
System D 625 lines
ChannelVideo carrier (MHz)Audio carrier (MHz)
149.7556.25
259.2565.75
377.2583.75
485.2591.75
593.2599.75
6175.25181.75
7183.25189.75
8191.25197.75
9199.25205.75
10207.25213.75
11215.25221.75
12223.25229.75
Channel arrangement for China
ChannelFrequency range (MHz)Video carrier (MHz)Audio carrier (MHz)DTMB center frequency (MHz)
Band I
148.5-56.549.7556.2552.5
256.5-64.557.7564.2560.5
364.5-72.565.7572.2568.5
476-8477.2583.7580
584-9285.2591.7588
Band III
6167-175168.25174.25171
7175-183176.25182.75179
8183-191184.25190.75187
9191-199192.25198.75195
10199-207200.25206.75203
11207-215208.25214.75211
12215-223216.25222.75219
System D 625 lines
ChVideo (MHz) DTMB (MHz)Audio (MHz)
13471.25 474477.75
14479.25 482485.75
15487.25 490493.75
16495.25 498501.75
17503.25 506509.75
18511.25 514517.75
19519.25 522525.75
20527.25 530533.75
21535.25 538541.75
22543.25 546549.75
23551.25 554557.75
24559.25 562565.75
25605.25 610611.75
26613.25 618619.75
27621.25 626627.75
28629.25 634635.75
29637.25 642643.75
30645.25 650651.75
31653.25 658659.75
32661.25 666667.75
33669.25 674675.75
34677.25 682683.75
35685.25 690691.75
36693.25 698699.75
37701.25 706707.75
38709.25 714715.75
39717.25 722723.75
40725.25 730731.75
41733.25 738739.75
42741.25 746747.75
43749.25 754755.75
44757.25 762763.75
45765.25 770771.75
46773.25 778779.75
47781.25 786787.75
48789.25 794795.75
49797.25 802803.75
50805.25 810811.75
51813.25 818819.75
52821.25 826827.75
53829.25 834835.75
54837.25 842843.75
55845.25 850851.75
56853.25 858859.75
57861.25 866867.75
58871.25 874877.75
59879.25 882885.75
60887.25 890893.75
61895.25 898901.75
62903.25 906909.75
  • 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.

See also

References
  1. Report 624-4 Characteristics of television systems (PDF). UIT. 1990.
  2. "World Analogue Television Standards and Waveforms". August 30, 2012. Archived from the original on 30 August 2012.
  3. ""M.I. Krivosheev: Participation in the development of mass TV broadcasting" - an exhibition at Ostankino TV Center".
  4. "Mark Iosifovich Krivosheev (1922-2018)".
  5. "World Analogue Television Standards and Waveforms". www.pembers.freeserve.co.uk. Archived from the original on 30 August 2012. Retrieved 12 January 2022.
  6. "World Analogue Television Standards and Waveforms". www.pembers.freeserve.co.uk. Archived from the original on 30 August 2012. Retrieved 12 January 2022.
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