- Отрасли:
- Number of terms: 20560
- Number of blossaries: 0
- Company Profile:
Tektronix provides test and measurement instruments, solutions and services for the computer, semiconductor, military/aerospace, consumer electronics and education industries worldwide.
The key channel processor, providing a separate channel specifically for black and white key signals that processes and manipulates an external key signal in the same way as source video in 3D space.
Industry:Entertainment
Sign or symbol used to convey a specific quantity of information either by itself or with other numbers of its set: 2, 3, 4, and 5 are digits.
The base or radix must be specified and each digit’s value assigned.
Industry:Entertainment
a) Having discrete states. Most digital logic is binary, with two states (on or off). b) A discontinuous electrical signal that carries information in binary fashion. Data is represented by a specific sequence of off-on electrical pulses. A method of representing data using binary numbers. An analog signal is converted to digital by the use of an analog-to-digital (A/D) converter chip by taking samples of the signal at a fixed time interval (sampling frequency). Assigning a binary number to these samples, this digital stream is then recorded onto magnetic tape. Upon playback, a digital-to-analog (D/A) converter chip reads the binary data and reconstructs the original analog signal. This process virtually eliminates generation loss as every digital-to-digital copy is theoretically an exact duplicate of the original allowing multi-generational dubs to be made without degradation.
In actuality of course, digital systems are not perfect and specialized hardware/software is used to correct all but the most severe data loss.
Digital signals are virtually immune to noise, distortion, crosstalk, and other quality problems. In addition, digitally based equipment often offers advantages in cost, features, performance, and reliability when compared to analog equipment.
Industry:Entertainment
a) NRSC (National Radio Systems Committee) term for the next generation of digital radio equipment.
b) Modulations for sending digital rather than analog audio signals by either terrestrial or satellite transmitter with audio response up to compact disc quality (20 kHz). c) DAB was started as EUREKA project EU 147 in 1986. The digital audio coding process called MUSICAM was designed within EUREKA 147 by CCETT. The MUSICAM technique was selected by MPEG as the basis of the MPEG-1 audio coding, and it is the MPEG-1 Layer II algorithm which will be used in the DAB system. The EUREKA 147 project, in close cooperation with EBU, introduced the DAB system approach to the ITU-R, which subsequently has been contributing actively for the worldwide recognition and standardization of the DAB system. EBU, ETSI and EUREKA 147 set up a joint task committee with the purpose of defining a European Telecommunications Standard (ETS) for digital sound broadcasting, based on the DAB specifications. ETSI published the EUREKA 147 system as standard ETS 300 401 in February 1995, and market adoption is forthcoming; the BBC, for instance, plans to have 50% transmission coverage in 1997 when DAB receivers are being introduced to the public.
Industry:Entertainment
A system which converts audio signals into digital words which are stored on magnetic tape for later reconversion to audio in such a manner that dropouts, noise, distortion, and other poor tape qualities are eliminated.
Industry:Entertainment
A development of the original analog Betacam VTR which records digitally on a Betacam-style cassette. A digital video tape format using the CCIR 601 standard to record 4:2:2 component video in compressed form on 12.5 mm (1/2") tape.
Industry:Entertainment
A GVG option and term. A digital border type with fewer settings, hence less control than the analog type used on Ampex switchers.
Industry:Entertainment
Facing the high costs of copying, handling and distribution of film, an infrastructure enabling digital transport of movies to digital cinemas could be highly attractive. In addition, digital delivery of films can effectively curb piracy. The MPEG-2 syntax supports the levels of quality and features needed for this application.
Industry:Entertainment
Digital chroma keying differs from its analog equivalent in that it can key uniquely from any one of the 16 million colors represented in the component digital domain. It is then possible to key from relatively subdued colors, rather than relying on highly saturated colors that can cause color spill problems on the foreground. A high-quality digital chroma keyer examines each of the three components of the picture and generates a linear key for each. These are then combined into a composite linear key for the final keying operation. The use of three keys allows much greater subtlety of selection than does a chrominance-only key.
Industry:Entertainment
Component signals in which the values for each pixel are represented by a set of numbers.
Industry:Entertainment
