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- Number of terms: 20560
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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 keyer that appears only on top of an “A” bus background video on an M/E.
Industry:Entertainment
Editing from a single source using effects to transition from the source to itself (source “A” to “A”) using a picture freeze at the end of one scene to transition the start of the next scene.
Industry:Entertainment
Creating fades, wipes and other transitions from one video source to another.
Industry:Entertainment
An edit that records new audio and video tracks. Also called Straight Cut.
Industry:Entertainment
The a:b:c notation for sampling ratios, as found in the ITU-R BT.601 specifications, has the following meaning: a) 4:2:2 means 2:1 horizontal downsampling, no vertical downsampling. Think four Y samples for every two Cb and 2 Cr samples in a scan line. b) 4:1:1 ought to mean 4:1 horizontal downsampling, no vertical. Think four Y samples for every one Cb and one Cr samples in a scan line. It is often misused to mean the same as 4:2:0. c) 4:2:0 means 2:1 horizontal and 2:1 vertical downsampling. Think four Y samples for every Cb and Cr samples in a scan line. Not only is this notation not internally consistent, but it is incapable of being extended to represent any unusual sampling ratios, that is different ratios for the Cb and Cr channels.
Industry:Entertainment
Duplicate rolls of videotape information having identical time code; required to achieve effects of dissolves.
Industry:Entertainment
Television network financially supporting development of ACTV and pioneering the use of digital video transmission.
Industry:Entertainment
The alternating current, usually of frequency several times higher than the highest signal frequency, that is fed to a record head in addition to the signal current. AC bias serves to linearize the recoding process and is universally used in analogue recording. Generally, a large AC bias is necessary to achieve maximum long-wavelength output and linearity, but a lower value of bias is required to obtain maximum short-wavelength output.
The mechanism of AC bias can best be explained in terms of anhysteresis.
Industry:Entertainment
Any DCT coefficient for which the frequency in one or both dimensions is non-zero.
Industry:Entertainment
A) AC coupling is a method of inputting a video signal to a circuit to remove any DC offset, or the overall voltage level that the video signal “rides” on. One way to find the signal is to remove the DC offset by AC coupling, and then do DC restoration to add a known DC offset (one that we selected). Another reason AC coupling is important is that it can remove harmful DC offsets. b) A connexion that removes the constant voltage (DC component) on which the signal (AC component) is riding.
Implemented by passing the signal through a capacitor.
Industry:Entertainment
