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视音频专业术语表

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视音频专业术语表(25)

2017-02-13 09:15 admin 人关注

A B C D E F G H I  J K L M N O P Q R S T U V W X Y Z

Y
Y - Luminance or luma.
Y Cr Cb - Used to describe the color space for interlaced component video. Also see "Y, R-Y, B-Y."
Y Pb Pr - Used to describe the color space for progressive-scan (non-interlaced) component video. Also see "Y, R-Y, B-Y."
Y signal - The luma signal transmitted in standard color video. In a color picture, the Y signal is made up of 0.30 red, 0.59 green, and 0.11 blue. It is compatible with a standard monochrome receiver.
Y to C delay - Relative delay or timing of the luminance channel compared to the chrominance channel in a video system.
Y, R-Y, B-Y - Color difference signal designation. Y corresponds to the luminance signal; R-Y corresponds to the red minus luminance signal, and B-Y corresponds to the blue minus luminance signal. After luminance is subtracted from red and blue, the remainder is considered to be the green portion of the RGB video signal. These signals are derived as follows: Y = 0.3 red + 0.59 green + .11 blue; R-Y = 0.7 red - 0.59 green - 0.11 blue; B-Y = 0.89 blue - 0.59 green - 0.3 red
Y/C - The technical description of S-video. The luminance signal, Y, and the chrominance signal, C, are carried on separate signal/ground pairs. Because the Y channel is carried separately, higher bandwidth is possible and color subcarrier crosstalk is eliminated.
Y/C separator (YCS) - A Y/C separator isolates the luma (Y) and chroma (C) components of a composite video signal. This is the first step necessary in decoding composite video.
YUV - Defines color space in terms of Y – luminance or brightness, and two color-difference components, U - red minus luminance and V - blue minus luminance. YUV is interchangeable with “Y Cb Cr” for digital component video and “Y Pb Pr” for analog component video.

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