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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 way of combining two images. How the mixing is performed is provided by the alpha channel. The little box that appears over the left-hand shoulder of a news anchor is put there by an alpha mixer.
Wherever the pixels of the little box appear in the frame buffer, an alpha number of “1” is put in the alpha channel. Wherever they don’t appear, an alpha number of “0” is placed. When the alpha mixer sees a “1” coming from the alpha channel, it displays the little box. Whenever it sees a “0,” it displays the news anchor. Of course, it doesn’t matter if a “1” or a “0” is used, but you get the point.
Industry:Entertainment
Light that emanates from no particular source, coming from all directions with equal intensity.
Industry:Entertainment
A representative sample of background audio (such as a refrigerator hum or crowd murmur) particular to a shooting location.
Ambient sound is gathered in the course of a production to aid the sound editor in making cuts or filling in spaces between dialog. Also called Room Tone.
Industry:Entertainment
An editing method where the footage is assembled in the final scene order. Scene 1, scene 2, etc.
Industry:Entertainment
A) The process used for some radio (AM broadcast, in North American audio service broadcast over 535 kHz-1705 kHz) and television video transmission. A low-frequency (program) signal modulates (changes) the amplitude of a high-frequency RF carrier signal (causing it to deviate from its nominal base amplitude). The original programme signal is recovered (demodulated) at the receiver. This system is extensively used in broadcast radio transmission because it is less prone to signal interference and retains most of the original signal quality. In video, FM is used in order to record high quality signals on videotape.
b) The process by which the amplitude of a high-frequency carrier is varied in proportion to the signal of interest. In the PAL television system, AM is used to encode the colour information and to transmit the picture. Several different forms of AM are differentiated by various methods of sideband filtering and carrier suppression. Double sideband suppressed carrier is used to encode the PAL colour information, while the signal is transmitted with a large-carrier vestigial sideband scheme.
Industry:Entertainment
The form of modulation used in broadcast and cable television transmission. It is more efficient than dual-sideband amplitude modulation and is easier to implement than single-sideband amplitude modulation.
Industry:Entertainment
A term used in connexion with magnetic tape testing and refers to the reproduced peak-to-peak voltage and its variation from what was recorded.
Industry:Entertainment
A) A continuous electrical signal that carries information in the form of variable physical values, such as amplitude or frequency modulation.
b) A signal which moves through a continuous range of settings or levels.
c) An adjective describing any signal that varies continuously as opposed to a digital signal that contains discrete levels representing the binary digits 0 and 1.
d) A signal that is an analogy of a physical process and is continuously variable, rather than discrete. See also Digitization.
Industry:Entertainment
A form of MAC optimised for remote broadcasting links.
Industry:Entertainment
