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Tektronix provides test and measurement instruments, solutions and services for the computer, semiconductor, military/aerospace, consumer electronics and education industries worldwide.
A system for determining the tristimulus values of any spectral power distribution using the set of reference colour stimuli X, Y, Z, and the three CIE colour matching functions x(lambda), y(lambda), z(lambda), adopted by the CIE in 1931.
Industry:Entertainment
Three-dimensional, approximately uniform colour space produced by plotting in rectangular coordinates L*, a*, b* quantities defined by the following equations. X, Y, Z describe the colour stimulus considered, and Xn, Yn, Zn describe a specified white achromatic stimulus (i.e., white reference). Equal distances in the colour space represent approximately equal colour differences.
: L* = 116 (Y/Yn)^(1/3) – 16 Y/Yn a* = 500 ((X/Xn^(1/3) – (Y/Yn)^(1/3)) X/Xn ) > 0.008 856 b* = 200 ((Y/Yn)^(1/3) – (Z/Zn)^(1/3)) Z/Zn
Industry:Entertainment
Three-dimensional, approximately uniform colour space produced by plotting in rectangular coordinated L*, u*, v* quantities defined by the following equations. Y, u', v' describe the colour stimulus considered, and Yn, u'n, v'n describe a specified white achromatic stimulus (white reference). The coordinates of the associated chromaticity diagram are u' and v'. L* is the approximate correlation of lightness, u* and v* are used to calculate an approximate correlate of chroma. Equal distances in the colour space represent approximately equal colour differences.
: L* = 116 (Y/Yn)^(1/3) – 16 Y/Yn > 0.008 856 u* = 13 L * (u' – u'n) v* = 13 L * (v' – v'n)
Industry:Entertainment
A video system used in many commercial installations for specific purposes such as security, medical, and educational.
Industry:Entertainment
A group of pictures in which the last pictures do not need data from the next GOP for bidirectional coding. Closed GOP is used to make a splice point in a bit stream.
Industry:Entertainment
A MAC (Multiplexed analogue Component) with audio and data time multiplexed after modulation, specified for some European DBS. See also MAC.
Industry:Entertainment
French acronym for the Mixed Telephone and Television Committee, an international standardisation committee concerned with such issues as B-ISDN.
Industry:Entertainment
The designation for the subtractive colour system used in pigment printers. CMYK refers to the colours that make up the system – Cyan, Magenta, Yellow, and black. In the CMYK subtractive colour system, cyan, magenta, yellow, and black pigments or inks are applied to a white surface to philtre that colour light information from the white surface to create the final color. Black is used because cyan, magenta, and yellow cannot be combined to create a true black; rather it is a muddy brown.
Industry:Entertainment
A subtractive colour space with cyan, magenta, and yellow as primary colour set with an optional addition of black (K). For such a colour set, subtractive colour mixture applies. The CMYK values used represent the amount of colourant placed onto the background medium. They include the effects of dot gain.
Industry:Entertainment
International Radio Consultative Committee, an international standards committee that has been absorbed by the parent body, the ITU. A permanent organisation within the ITU with the duty to study technical and operating questions relating specifically to radio communications and to make recommendations on them. The CCIR does not prepare regulations; it draws up recommendations and reports, produced by experts from both public and private entities, which provide guidance on the best operational methods and techniques. The CCIR is expected to base its recommendations upon 150 and IEC international standards, but when no relevant one exists, the CCIR has been known to initiate standardization. These recommendations and reports provide a basis for international standardisation of telecommunications.
Industry:Entertainment
