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- Number of terms: 20560
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- Company Profile:
Tektronix provides test and measurement instruments, solutions and services for the computer, semiconductor, military/aerospace, consumer electronics and education industries worldwide.
a) CD-ROM means “Compact Disc Read Only Memory.” A CD-ROM is physically identical to a Digital Audio Compact Disc used in a CD player, but the bits recorded on it are interpreted as computer data instead of music. You need to buy a CD-ROM Drive and attach it to your computer in order to use CD-ROMs. A CD-ROM has several advantages over other forms of data storage, and a few disadvantages.
A CD-ROM can hold about 650 megabytes of data, the equivalent of thousands of floppy discs. CD-ROMs are not damaged by magnetic fields or the x-rays in airport scanners. The data on a CD-ROM can be accessed much faster than a tape, but CD-ROMs are 10 to 20 times slower than hard discs. b) A flat metallic disk that contains information that you can view and copy onto your own hard disk; you cannot change or add to its information.
Industry:Entertainment
This modeling technique defines a world in terms of its edges. The primary components of a boundary rep world are vertices and polygons. PictureMaker is a boundary rep system.
Industry:Entertainment
Standard music CDs. CD-DA became CD-ROMs when people realized that you could store 650 Mb of computer data on a 12-cm optical disc. CD-ROM drives are simply another kind of digital storage media for computers, albeit read-only. They are peripherals just like hard disks and floppy drives. (Incidentally, the convention is that when referring to magnetic media, it is spelled disk. Optical media like CDs, laserdisc, and all the other formats are spelled disc.) CDDI (Copper Data Distributed Interface)
Industry:Entertainment
A relatively simple object, usually a rectangle or box with the overall dimensions, or bounds, of a more complex object. A bounding is used in place of that exact, more complex, modeled shape to represent it in an animation preview, or to predict the inclusion of that object in the scene. This reduces the calculation/production time and expense when previewing computer animation sequences to check continuity, positions, and timing.
Industry:Entertainment
a) A group of transport streams in which programs are identified by a combination of network ID and PID (part of DVB-SI). b) A collection of services marketed as a single entity.
Industry:Entertainment
A circuit that responds to the relative amplitudes of two inputs, A and B, by providing a binary output, Z, that indicates A>B or A<B.
The comparator has two inputs, X, Y, and one output, Z. A comparator “compares” A to B. If A is larger than B, the output of the comparator is a “1.” If A is smaller than B, the output is a “0.” If A = B, the output Z may be undefined and oscillate between “1” and “0” wildly until that condition is removed – it may be a “1,” or it may be a “0.” It depends on how the comparator was designed. The comparator implements the following mathematical function.
If A – B > 0, then Z = 1 If A – B < 0, then Z = 0
Industry:Entertainment
a) The BAT provides information regarding bouquets (collections of services marketed as a single entity).
b) Table describing a bouquet of programs offered by a broadcaster. DVB only.
Industry:Entertainment
A complex concept regarding how well ATV schemes work with existing television receivers, transmission channels, home video equipment, and professional production equipment. See also Channel- Compatible, Receiver-Compatible.
A. ATV Receiver Compatibility Levels Level 5 – ATV signal is displayed as ATV on an NTSC TV set Level 4 – ATV signal appears as highest quality NTSC on an NTSC TV set Level 3 – ATV signal appears as reduced quality NTSC on an NTSC TV set Level 2 – ATV signal requires inexpensive adapter for an NTSC TV set Level 1 – ATV signal requires expensive adaptor for an NTSC TV set Level 0 – ATV signal cannot be displayed on an NTSC TV set B. Compatible ATV Transmission Schemes • Receiver-compatible and channel-compatible single 6 MHz channel • Receiver-compatible channel plus augmentation channel • Necessarily adjacent augmentation channel • Not necessarily adjacent augmentation channel • Non-receiver-compatible channel plus simulcast channel.
Industry:Entertainment
The bowtie test signal actually consists of three signals, each being fed to a different channel of the CAV system and is used to evaluate the relative amplitudes and relative timing on some CAV waveform monitors such as the WFM300A. The figure below shows the three waveforms in the parade mode. The first signal is a 500 kHz sinewave packet which is fed to video channel 1. The other two signals are identical 502 kHz. The three sinewave packets are generated to be precisely in phase at their centers. Because of their 2 kHz offset, the color difference channels become increasingly out of phase with the luminance channel on either side of center. If the three signals are properly timed, their sum results in the bowtie waveform shown below.
Industry:Entertainment
