CCIR System N

Summary

CCIR System N is an analog broadcast television system introduced in 1951 and adopted by Argentina, Paraguay and Uruguay (since 1980), paired with the PAL color system (PAL-N).[1][2] It was also used briefly in Brazil and Venezuela.

It employs the 625 line/50 field per second waveform of PAL-B/G, D/K, H, and I, but on a 6 MHz channel with a chrominance subcarrier frequency of 3.582056 MHz[2][3][4] (very similar to NTSC). On the studio production level, PAL-B cameras and equipment were used, with the signal then transcoded to PAL-N for broadcast.[2] This allows 625-line, 50-frame/s video to be broadcast in a 6-MHz channel, at some cost in horizontal resolution.

SpecificationsEdit

Some of the important specs are listed below.[5][3]

System N specifications
Frame rate Interlace Field rate Line/frame Line rate Visual b/w Vision mod. Preemphasis Sound mod. Sound offset Channel b/w
25 2/1 50 625 15625 4.2 MHz. Neg. FM +4.5 MHz. 6 MHz.

Television channels were arranged as follows:[6]

Channel Channel Limits (MHz) Vision Carrier (MHz) Main Sound Carrier (MHz)
A14/J13 470.00 - 476.00 471.25 475.75
A15/J14 476.00 - 482.00 477.25 481.75
A16/J15 482.00 - 488.00 483.25 487.75
A17/J16 488.00 - 494.00 489.25 493.75
A18/J17 494.00 - 500.00 495.25 499.75
A19/J18 500.00 - 506.00 501.25 505.75
A20/J19 506.00 - 512.00 507.25 511.75
A21/J20 512.00 - 518.00 513.25 517.75
A22/J21 518.00 - 524.00 519.25 523.75
A23/J22 524.00 - 530.00 525.25 529.75
A24/J23 530.00 - 536.00 531.25 535.75
A25/J24 536.00 - 542.00 537.25 541.75
A26/J25 542.00 - 548.00 543.25 547.75
A27/J26 548.00 - 554.00 549.25 553.75
A28/J27 554.00 - 560.00 555.25 559.75
A29/J28 560.00 - 566.00 561.25 565.75
A30/J29 566.00 - 572.00 567.25 571.75
A31/J30 572.00 - 578.00 573.25 577.75
A32/J31 578.00 - 584.00 579.25 583.75
A33/J32 584.00 - 590.00 585.25 589.75
A34/J33 590.00 - 596.00 591.25 595.75
A35/J34 596.00 - 602.00 597.25 601.75
A36/J35 602.00 - 608.00 603.25 607.75
A37/J36 608.00 - 614.00 609.25 613.75
A38/J37 614.00 - 620.00 615.25 619.75
A39/J38 620.00 - 626.00 621.25 625.75
A40/J39 626.00 - 632.00 627.25 631.75
A41/J40 632.00 - 638.00 633.25 637.75
A42/J41 638.00 - 644.00 639.25 643.75
A43/J42 644.00 - 650.00 645.25 649.75
A44/J43 650.00 - 656.00 651.25 655.75
A45/J44 656.00 - 662.00 657.25 661.75
A46/J45 662.00 - 668.00 663.25 667.75
A47/J46 668.00 - 674.00 669.25 673.75
A48/J47 674.00 - 680.00 675.25 679.75
A49/J48 680.00 - 686.00 681.25 685.75
A50/J49 686.00 - 692.00 687.25 691.75
A51/J51 692.00 - 698.00 693.25 697.75
A52/J51 698.00 - 704.00 699.25 703.75
A53/J52 704.00 - 710.00 705.25 709.75
A54/J53 710.00 - 716.00 711.25 715.75
A55/J54 716.00 - 722.00 717.25 721.75
A56/J55 722.00 - 728.00 723.25 727.75
A57/J56 728.00 - 734.00 729.25 733.75
A58/J57 734.00 - 740.00 735.25 739.75
A59/J58 740.00 - 746.00 741.25 745.75
A60/J59 746.00 - 752.00 747.25 751.75
A61/J60 752.00 - 758.00 753.25 757.75
A62/J61 758.00 - 764.00 759.25 763.75
A63/J62 764.00 - 770.00 765.25 769.75
A64 770.00 - 776.00 771.25 775.75
A65 776.00 - 782.00 777.25 781.75
A66 782.00 - 788.00 783.25 787.75
A67 788.00 - 794.00 789.25 793.75
A68 794.00 - 800.00 795.25 799.75
A69 800.00 - 806.00 801.25 805.75

See alsoEdit

Notes and referencesEdit

  1. ^ "Help Guide | On TV color systems". www.sony-asia.com.
  2. ^ a b c Tecnologica, Centro de Informacion (January 19, 1999). "Informacion Tecnologica". Centro de Informacion Tecnologica – via Google Books.
  3. ^ a b "World Analogue Television Standards and Waveforms". August 30, 2012. Archived from the original on 2012-08-30.
  4. ^ https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.470-6-199811-S!!PDF-E.pdf[bare URL PDF]
  5. ^ Reference Data for Radio Engineers, ITT Howard W.Sams Co., New York, 1977, section 30
  6. ^ "World Analogue Television Standards and Waveforms". August 30, 2012. Archived from the original on 2012-08-30.

External linksEdit

  • World Analogue Television Standards and Waveforms
  • Fernsehnormen aller Staaten und Gebiete der Welt