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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 new format for putting full-length movies on a 5" CD using MPEG-2 compression for “much better than VHS” quality.
Also known as Digital Versatile Disc.
Industry:Entertainment
A) NRSC (National Radio Systems Committee) term for the next generation of digital radio equipment.
b) Modulations for sending digital rather than analogue 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 standardisation 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 multimedia system marketed by Intel.
DVI is not just an image-compression scheme, but includes everything that is necessary to implement a multimedia playback station including chips, boards, and software. DVI technology brings television to the microcomputer.
DVI’s concept is simple: information is digitised and stored on a random- access device such as a hard disc or a CD-ROM, and is accessed by a computer. DVI requires extensive compression and real-time decompression of images. Until recently this capability was missing. DVI enables new applications. For example, a DVI CD-ROM disc on twentieth-century artists might consist of 20 minutes of motion video; 1,000 high-res still images, each with a minute of audio; and 50,000 pages of text. DVI uses the YUV system, which is also used by the European PAL colour television system.
The Y channel encodes luminance and the U and V channels encode chrominance. For DVI, we subsample 4-to-1 both vertically and horizontally in U and V, so that each of these components requires only 1/16 the information of the Y component. This provides a compression from the 24-bit RGB space of the original to 9-bit YUV space. The DVI concept originated in 1983 in the inventive environment of the David Sarnoff Research centre in Princeton, New Jersey, then also known as RCA Laboratories. The ongoing research and development of television since the early days of the Laboratories was extending into the digital domain, with work on digital tuners, and digital image processing algorithms that could be reduced to cost-effective hardware for mass-market consumer television.
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 analogue 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 analogue type used on Ampex switchers.
Industry:Entertainment
A feature found on some camcorders that electronically increases the lens zoom capability by selecting the centre of the image and enlarging it digitally.
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
The process of changing an electronic signal that is an analogy (analog) of a physical process such as vision or hearing into a discrete numerical form. Digitization is subdivided into the processes of sampling the analogue signal at a moment in time, quantizing the sample (assigning it a numerical level), and coding the number in binary form. The advantages of digitization include improved transmission; the disadvantages include a higher bit rate than the analogue bandwidth. Bit rate reduction schemes work to reduce that disadvantage.
Industry:Entertainment
