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  1. › wiki › 576i576i - Wikipedia

    576i is a standard-definition video mode originally used for terrestrial television in most countries of the world where the utility frequency for electric power distribution is 50 Hz. Because of its close association with the colour encoding system, it is often referred to as simply PAL , PAL/ SECAM or SECAM when compared to its 60 Hz ...

  2. North America Canada. Color broadcasts from the United States were available to Canadian population centers near the border since the mid-1950s. At the time that NTSC color broadcasting was officially introduced into Canada in 1966, less than one percent of Canadian households had a color television set.

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