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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.
CD-I means Compact Disc Interactive. It is meant to provide a standard platform for mass consumer interactive multimedia applications. So it is more akin to CD-DA, in that it is a full specification for both the data/code and standalone playback hardware: a CD-I player has a CPU, RAM, ROM, OS, and audio/video/(MPEG) decoders built into it. Portable players add an LCD screen and speakers/phone jacks. It has limited motion video and still image compression capabilities. It was announced in 1986, and was in beta test by spring 1989. This is a consumer electronics format that uses the optical disc in combination with a computer to provide a home entertainment system that delivers music, graphics, text, animation, and video in the living room. Unlike a CD-ROM drive, a CD-I player is a standalone system that requires no external computer.
It plugs directly into a TV and stereo system and comes with a remote control to allow the user to interact with software programmes sold on discs. It looks and feels much like a CD player except that you get images as well as music out of it and you can actively control what happens. In fact, it is a CD-DA player and all of your standard music CDs will play on a CD-I player; there is just no video in that case. For a CD-I disk, there may be as few as 1 or as many as 99 data tracks. The sector size in the data tracks of a CD-I disc is approximately 2 kbytes. Sectors are randomly accessible, and, in the case of CD-I, sectors can be multiplexed in up to 16 channels for audio and 32 channels for all other data types. For audio, these channels are equivalent to having 16 parallel audio data channels instantly accessible during the playing of a disk. Some useful references about CD-I are: “Discovering CD-I” available for $45 from Microware Systems Corp.; “Introducing CD-I” ISBN 0-201-62748-5; “The CD-I Production Handbook” ISBN 0-201-62750-7; “The CD-I Design Handbook” ISBN 0-201-62749-3.
Industry:Entertainment
A) An unnatural sudden variation in the brightness of the picture.
b) Oscillations and noise generated when a mechanical switch is opened or closed. See Debounce.
Industry:Entertainment
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 disc 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 modelling 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 realised 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 discs 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, modelled 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 cheque continuity, positions, and timing.
Industry:Entertainment
A) A group of transport streams in which programmes 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 programmes 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
