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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.
The data stream to be transmitted via satellite (DVB-S) is loaded bit by bit into shift registers. The data which is split and delayed as it is shifted through different registers is combined in several paths. This means that double the data rate (two paths) is usually obtained.
Puncturing follows to reduce the data rate: the time sequence of the bits is predefined by this coding and is represented by the trellis diagram.
Industry:Entertainment
a) Describes the way in which the 1’s and 0’s of the data stream are represented on the transmission path.
b) Refers to any processing to use a particular communication channel or medium.
Examples are forward error correction coding and prioritization of different parts of the coded video bit stream.
Industry:Entertainment
Small magnetic toruses of ferrite that are used to store a bit of information. These can be strung on wires so that large memory arrays can be formed. The main advantage of core memory is that it is nonvolatile.
Industry:Entertainment
Techniques for adding information to an NTSC channel without increasing its bandwidth or eliminating its receiver-compatibility.
Industry:Entertainment
A system for reducing the noise content of circuits by removing low-amplitude noise riding on the baseline of the signals. Both aperture correction and enhancement can be cored. It involves preventing any boosting of very low level edge transitions. The threshold point is the coring control. The more the coring is increased, the more the extra noise added by the enhanced (or aperture corrector), high frequency boosting is reduced. Of course, the fine detail enhancement is also reduced or eliminated.
Too high levels of coring can cause a “plastic picture” effect.
Industry:Entertainment
An ATV transmission scheme that will fit within the confines of a standard, 6 MHz NTSC transmission channel. A higher level of channel-compatibility demands NTSC-like AM-VSB transmission so that the ATV channel will not cause any interference to other channels that would not otherwise be caused by an NTSC channel. Channel-compatible ATV schemes need not necessarily also be receiver-compatible.
Industry:Entertainment
Co-sited sampling ensures that the luminance and the chrominance digital information is simultaneous, minimizing chroma/luma delay. This sampling technique is applied to color difference component video signals: Y, Cr, and Cb. The color difference signals, Cr and Cb, are sampled at a sub-multiple of Y, the luminance frequency – 4:2:2, for example. With co-sited sampling, the two color difference signals are sampled at the same instant, as well as one of the luminance samples.
Industry:Entertainment
A chapter in a video disc is a section divider. Chapters are subsets of the video disc. In the DVD format, a chapter is a division of a title.
Industry:Entertainment
Relates to SMPTE 125M component digital video, in which the luminance component (Y) is sampled four times for every two samples of the two chrominance components (Cb and Cr). Co-siting refers to delaying transmission of the Cr component to occur at the same time as the second sample of luminance data. This produces a sampling order as follows: Y1/Cb1, Y2/Cr1, Y3/Cr3, Y4/Cb3, and so on. Co-siting reduces required bus width from 30 bits to 20 bits.
Industry:Entertainment
Programming that allows a viewer to jump immediately to a particular part of a title. A book with chapters is the common metaphor for a DVD.
Industry:Entertainment
