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C
Published in Philip A. Laplante, Comprehensive Dictionary of Electrical Engineering, 2018
composite second order (CSO) ratio of the power in the second-order distortion products to power in the carrier in a cable television channel. composite sync a synchronizing signal consisting of both horizontal and vertical sync information. Composite sync is used for providing synchronizing pulses to video equipment in the studio. composite transform a transform that can be factored into two or more transforms. composite triple beat (CTB) same as composite second order but for third-order distortion. See composite second order. composite video (1) a single video signal that contains luminance, color, and synchronization information. NTSC, PAL, and SECAM are all examples of composite video formats. (2) the complete video signal. For B&W, it consists of the picture signal, blanking pulses, and synchronizing signals. For color, color synchronizing and color picture information are added. See figure. compositional rule of inference generalization of the notion of function. Let X and Y be two universes of discourse, A be a fuzzy set of X , and R is a fuzzy relation in X × Y . The compositional rule of inference associates a fuzzy set B in Y to A in three steps: (1) Cylindrical extension of A in X × Y ; (2) Intersection of the cylindrical extension with R; (3) B is the projection of the resulting fuzzy set on Y . If we choose intersection as triangular norm and union as triangular co-norm, then we have the
The Studio
Published in Peter Hodges, An Introduction to Video and Audio Measurement, 2013
Composite video can still appear in the most up-to-date digital installations. Large monitor stacks are often cost-cut to make use of existing analogue designs. These require analogue feeds and composite has a continuing role here, often in YC form—separate luminance and chrominance, but still based on PAL or NTSC and perfectly adequate for the job.
Squeezing through the pipe: digital compression
Published in Jonathan Higgins, Satellite Newsgathering, 2012
Hence video presented as three separate signals – a luminance and two color difference signals – is termed ‘component’ video, as opposed to composite video which has all the luminance and chrominance information combined into a single signal (along with the picture synchronization information).
The Changing Face of Public Broadcasting in India
Published in IETE Journal of Education, 2023
The color information was added later on, by introducing color difference signals at the upper end of the baseband, by suppressed carrier quadrature modulation, in the case of NTSC. This was done to reduce interaction between chrominance and luminance signals. The chrominance signal was modulated on a carrier frequency of 3.579545 MHz in the case of NTSC. In the case of CCIR system B or G, the luminance signal Y is generated by adding red (R), green (G), and blue (B) signals in the proportion Y = 0.299 R + 0.587 G + 0.114 B [6]. Color difference signals, Red – Luminance (R-Y), and Blue- Luminance (B-Y) were phase modulated on alternate lines, on a 4.43 MHz subcarrier, hence the name phase alternated line (PAL) color system. A color carrier burst was transmitted in the back porch of the H sync pulse to facilitate the locking of the locally generated color subcarrier in the receiver [7]. The color information was separated from the composite video, which contained luminance, as sync pulse as well as color information, by means of analog filters. The Red, Green, and Blue (R G B), signals were regenerated, by adding/ subtracting luminance and chrominance signals in the linear adder circuit. These were subsequently amplified and used for driving the corresponding electron guns of a color picture tube.