A | B | C | D | E | F | G | H | CH | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
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.[1][2][3][4]
Initially known as the I.B.T.O. 625-line system this was the first 625-line system, developed by Mark Krivosheev in 1948,[5][6] 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.[7][8]
Specifications
The general specifications for System D are listed below:[9]
- Frame rate: 25 Hz
- Interlace: 2/1
- Field rate: 50 Hz
- Lines/frame: 625
- Line rate: 15625 Hz
- 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:[10][11]
| Channel | Video carrier (MHz) | Audio carrier (MHz) |
|---|---|---|
| I | 41.75 | 48.25 |
| II | 49.75 | 56.25 |
| III | 59.25 | 65.75 |
| IV | 77.25 | 83.75 |
| 1 | 145.25 | 151.75 |
| 2 | 153.25 | 159.75 |
| 3 | 161.25 | 167.75 |
| 4 | 169.25 | 175.75 |
| 5 | 177.25 | 183.75 |
| 6 | 185.25 | 191.75 |
| 7 | 193.25 | 199.75 |
| 8 | 201.25 | 207.75 |
| 9 | 209.25 | 215.75 |
| Channel | Video carrier (MHz) | Audio carrier (MHz) |
|---|---|---|
| 1 | 49.75 | 56.25 |
| 2 | 59.25 | 65.75 |
| 3 | 77.25 | 83.75 |
| 4 | 85.25 | 91.75 |
| 5 | 93.25 | 99.75 |
| 6 | 175.25 | 181.75 |
| 7 | 183.25 | 189.75 |
| 8 | 191.25 | 197.75 |
| 9 | 199.25 | 205.75 |
| 10 | 207.25 | 213.75 |
| 11 | 215.25 | 221.75 |
| 12 | 223.25 | 229.75 |
| Channel | Frequency range (MHz) | Video carrier (MHz) | Audio carrier (MHz) | DTMB center frequency (MHz) |
|---|---|---|---|---|
| Band I | ||||
| 1 | 48.5 - 56.5 | 49.75 | 56.25 | 52.5 |
| 2 | 56.5 - 64.5 | 57.75 | 64.25 | 60.5 |
| 3 | 64.5 - 72.5 | 65.75 | 72.25 | 68.5 |
| 4 | 76 - 84 | 77.25 | 83.75 | 80 |
| 5 | 84 - 92 | 85.25 | 91.75 | 88 |
| Band III | ||||
| 6 | 167 - 175 | 168.25 | 174.25 | 171 |
| 7 | 175 - 183 | 176.25 | 182.75 | 179 |
| 8 | 183 - 191 | 184.25 | 190.75 | 187 |
| 9 | 191 - 199 | 192.25 | 198.75 | 195 |
| 10 | 199 - 207 | 200.25 | 206.75 | 203 |
| 11 | 207 - 215 | 208.25 | 214.75 | 211 |
| 12 | 215 - 223 | 216.25 | 222.75 | 219 |
| Ch | Video (MHz) | DTMB (MHz) | Audio (MHz) |
|---|---|---|---|
| 13 | 471.25 | 474 | 477.75 |
| 14 | 479.25 | 482 | 485.75 |
| 15 | 487.25 | 490 | 493.75 |
| 16 | 495.25 | 498 | 501.75 |
| 17 | 503.25 | 506 | 509.75 |
| 18 | 511.25 | 514 | 517.75 |
| 19 | 519.25 | 522 | 525.75 |
| 20 | 527.25 | 530 | 533.75 |
| 21 | 535.25 | 538 | 541.75 |
| 22 | 543.25 | 546 | 549.75 |
| 23 | 551.25 | 554 | 557.75 |
| 24 | 559.25 | 562 | 565.75 |
| 25 | 605.25 | 610 | 611.75 |
| 26 | 613.25 | 618 | 619.75 |
| 27 | 621.25 | 626 | 627.75 |
| 28 | 629.25 | 634 | 635.75 |
| 29 | 637.25 | 642 | 643.75 |
| 30 | 645.25 | 650 | 651.75 |
| 31 | 653.25 | 658 | 659.75 |
| 32 | 661.25 | 666 | 667.75 |
| 33 | 669.25 | 674 | 675.75 |
| 34 | 677.25 | 682 | 683.75 |
| 35 | 685.25 | 690 | 691.75 |
| 36 | 693.25 | 698 | 699.75 |
| 37 | 701.25 | 706 | 707.75 |
| 38 | 709.25 | 714 | 715.75 |
| 39 | 717.25 | 722 | 723.75 |
| 40 | 725.25 | 730 | 731.75 |
| 41 | 733.25 | 738 | 739.75 |
| 42 | 741.25 | 746 | 747.75 |
| 43 | 749.25 | 754 | 755.75 |
| 44 | 757.25 | 762 | 763.75 |
| 45 | 765.25 | 770 | 771.75 |
| 46 | 773.25 | 778 | 779.75 |
| 47 | 781.25 | 786 | 787.75 |
| 48 | 789.25 | 794 | 795.75 |
| 49 | 797.25 | 802 | 803.75 |
| 50 | 805.25 | 810 | 811.75 |
| 51 | 813.25 | 818 | 819.75 |
| 52 | 821.25 | 826 | 827.75 |
| 53 | 829.25 | 834 | 835.75 |
| 54 | 837.25 | 842 | 843.75 |
| 55 | 845.25 | 850 | 851.75 |
| 56 | 853.25 | 858 | 859.75 |
| 57 | 861.25 | 866 | 867.75 |
| 58 | 871.25 | 874 | 877.75 |
| 59 | 879.25 | 882 | 885.75 |
| 60 | 887.25 | 890 | 893.75 |
| 61 | 895.25
Zdroj:https://en.wikipedia.org?pojem=CCIR_System_D Text je dostupný za podmienok Creative Commons Attribution/Share-Alike License 3.0 Unported; prípadne za ďalších podmienok. Podrobnejšie informácie nájdete na stránke Podmienky použitia.
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