Y

Y Signal

The luminance or brightness aspect of a video signal.

Y2K

Year 2000. The millennium. Often used to refer to the problem some computers have with recognizing that the year 2000 comes after the year 1999. “Trust the computer industry to shorten "Year 2000" to Y2K. It was this kind of thinking that caused the problem in the first place."

Y-688

Dub cable used for 3/4 inch U-matic® recorders. Separate cables are provided for the Y signal and the Chroma signal which is transmitted on a 688 KHz carrier frequency.

Y/C Video

Also called S-VHS video or S-Video. A component video signal standard that separates the luminance (Y) and chrominance (C) signals. Commonly used in S-VHS, 8mm and Hi8mm formats.

Y/R-Y/B-Y

A component video signal specification used in PAL encoding and NTSC decoding. Y refers to Luminance and R-Y, B-Y are the color differencing signal components. "Beta" type VTRs use this type of encoding method, also called 4:2:2 which refers to the bandwidth of each of the signals, Y, R-Y, and B-Y

YIQ

The signal components names of the composite analog signal. Y is luminance and I and Q are the In-Phase and Quadrature-Phase color differencing signal components, respectively.

YRGB

Luminance, red, green and blue components that together make up an image. YRGB color enhancement systems have more precise control so naturally all da Vinci systems use YRGB controls.

YSFX

This Renaissance 888 option allows the luminance and/ or the chrominance of the video signal to be inverted providing enhanced primary control and dramatic image treatments. YSFX is standard on da Vinci 2Ks

YUV

A color model used chiefly for video signals in which colors are specified according to their luminance-the Y component-and their hue saturation-the U and V components. It is also the Luminance and Color difference signals in the PAL system. Often incorrectly used to describe the luminance and color difference signals in component systems. However, U and V refer specifically to color difference signals which have been matrixed and filtered in order to be used with PAL coders. Component systems actually use Y,R-Y, B-Y

Yagi

The Yagi antenna is named for Dr. H. Yagi, a Japanese physicist who translated into English an antenna design based on a parallel array of dipole antennas. There are counter claims that say the actual design of the antenna was invented by a professor Uda. The design involves placing a slightly longer dipole behind, and a slightly shorter dipole in front of, the driven dipole to direct the radiation in the direction of the longer-to-shorter elements.

Today, Yagi antennas usually have several of the shorter ("director") elements and one of the longer ("reflector") elements separated by a small fraction of the wavelength of the driven element (about 1/10). Being a resonant dipole, the driven element has a length of one-half the wavelength being used.

For more information about the Yagi-Uda antennas click here.