Английская Википедия:CCIR System N

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Шаблон:Short description

Файл:Analog-TV-Systems.jpg
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.

Specifications

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

Файл:VHF Usage.svg
Plan showing VHF frequency ranges for ITU Systems

See also

Notes and references

Шаблон:Reflist

External links

Шаблон:Video formats Шаблон:Analogue TV transmitter topics

  1. Шаблон:Cite web
  2. 2,0 2,1 2,2 Шаблон:Cite book
  3. Шаблон:Cite web
  4. 4,0 4,1 Шаблон:Cite web
  5. Шаблон:Cite book
  6. Reference Data for Radio Engineers, ITT Howard W.Sams Co., New York, 1977, section 30