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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 distribution amplifier designed to amplify and fan-out parallel digital signals.
Industry:Entertainment
A) This nonlinear distortion is often referred to as “diff phase” or “dP.” It is present if a signal’s chrominance phase is affected by the luminance level. It occurs because of the system’s inability to uniformly process the high-frequency chrominance information at all luminance levels. Diff Phase is expressed in degrees of subcarrier phase. The subcarrier phase can be distorted such that the subcarrier phase is advanced (lead or positive) or delayed (lag or negative) in relation to its original position. In fact, over the period of a video line, the subcarrier phase can be both advanced and delayed. For this reason, it is important to specify whether “peak to peak diff phase” is being specified or “maximum deviation from 0” in one direction or another. Normally the “peak to peak diff phase” is given. dP distortions cause changes in hue when picture brightness changes. colours may not be properly reproduced, particularly in high-luminance areas of the picture. b) The phase change of the 3.6 MHz colour subcarrier introduced by the overall circuit, measured in degrees, as the subcarrier is varied from blanking to white level.
Industry:Entertainment
A method of recording in which the information (usually audio or video) is first coded in a digital form. Most commonly, a binary code is used and recoding takes place in terms of two discrete values of residual flux.
Industry:Entertainment
DPCM is a source coding scheme that was developed for encoding sources with memory. The reason for using the DPCM structure is that for most sources of practical interest, the variance of the prediction error is substantially smaller than that of the source.
Industry:Entertainment
The frequency at which an analogue signal is sampled to create a digital signal.
Industry:Entertainment
A special philtre sometimes also called a “diff step” philtre that is used to measure luminance nonlinearity. When this philtre is used with a luminance step waveform (see the waveform discussed in the Luminance Nonlinearity discussion), each step on the waveform is translated into a spike that is displayed on the waveform monitor. The height of each spike translates into the height of the step so the amount of distortion can be determined by comparing the height of each spike. Refer to the figure below.
Industry:Entertainment
A means of storage (usually magnetic tape, disk, or DVD) for audio, video, or other information that is in binary form.
Industry:Entertainment
Diffuse light is the light reflected by a matte surface; without glare or highlight. It is base on relative orientation of surface normal and light source positions and luminance.
Industry:Entertainment
A system using devices that can be in only one of two possible states.
Industry:Entertainment
Digicipher is a compression and transmission technology from General Instrument, dedicated to Digital TV distribution via satellite.
Digicipher video coding is based on DCT like MPEG, but does not use Bpictures.
Instead, it uses a so-called adaptive prediction mode. Digicipher 1 was the first incarnation and is still used today by many providers since it was the first commercially available digital compression scheme.
Industry:Entertainment
