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"Furthermore, in most television scenes there is less fine detail than coarse detail, so that the higher frequencies carry less power than the lower. It has therefore become customary to transmit the colour-difference signals on subcarriers having frequencies high in the luminance band, and carefully chosen to be suitable odd multiples of half (or sometimes a quarter of ) the line frequency, f, in order to coincide with the power troughs of the luminance signal."
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Спасибо.
"Furthermore, in most television scenes there is less fine detail than coarse detail, so that the higher frequencies carry less power than the lower. It has therefore become customary to transmit the colour-difference signals on subcarriers having frequencies high in the luminance band, and carefully chosen to be suitable odd multiples of half (or sometimes a quarter of ) the line frequency, f, in order to coincide with the power troughs of the luminance signal."
Субнесущая?
Поднесущая?
Спасибо.