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From Wikipedia, the free encyclopedia

Analog TV systems global map, with System N in orange.

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][3] 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][4][5] (very similar to NTSC). On the studio production level, standard PAL 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.

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The general System N specifications are listed below.[6][4]

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. 75 μs FM +4.5 MHz. 6 MHz.
Plan showing VHF frequency ranges for ITU Systems

See also

Notes and references

  1. ^ "Help Guide | On TV color systems".
  2. ^ a b c Tecnologica, Centro de Informacion (January 19, 1999). "Informacion Tecnologica". Centro de Informacion Tecnologica – via Google Books.
  3. ^ "Weltweite Fernsehsysteme (NTSC, PAL und SECAM)". 2005. Retrieved 2023-03-06.
  4. ^ a b "World Analogue Television Standards and Waveforms". August 30, 2012. Archived from the original on 2012-08-30.
  6. ^ Reference Data for Radio Engineers, ITT Howard W.Sams Co., New York, 1977, section 30

External links

This page was last edited on 27 June 2023, at 23:17
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