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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.
Standard addressing mode, characterized by the ability to reach any point in main storage directly. The address is specified as part of the instruction.
Industry:Entertainment
System developed by Comstat Corp. for satellite links.
Industry:Entertainment
a) A distribution scheme involving transmission of signals directly from satellites to homes. It does not carry the burden of terrestrial broadcasting’s restricted bandwidth and regulations and so is thought by many to be an ideal mechanism for the introduction of high base bandwidth ATV. DBS is the most effect delivery mechanism for reaching most rural areas; it is relatively poor in urban areas and in mountainous terrain, particularly in the north. Depending on the frequency band used, it can be affected by factors such as rain. b) Multiple television channel programming service that is transmitted direct from high powered satellites, directly to a home receiving dish.
Industry:Entertainment
DVD is the outcome of a battle between two formerly rivaling camps of optical data discs, each supporting the MMCD (Multimedia CD) and the SD (Super Density) formats. The MMDC and SD proposals featured different error correction, modulation, disc structure, etc., but targeted identical markets. Wisely, the two camps merged and agreed on a third format, that was a mix of the other two. The DVD, initially, addressed only movie player applications, but the nature of the medium has attracted other applications, too. In light of the increasing number of possible applications of the new disc format, it was therefore renamed to Digital Versatile Disc. The DVD consortium intends to position the DVD as a high-capacity, multimedia storage medium. A total of nine working groups in the consortium elaborate on various technology specific topics, such as video, ROM applications, audio-only systems, and copyprotection.
The movie player application remains the DVD’s reason for being, but there’s a chance that the DVD may also take over a huge share of the CD-ROM market. The promoters of the format agreed in December 1995 on a core set of specifications. The system operates at an average data rate of 4.69 Mbit/s and features 4.7 GB data capacity, which allows MPEG-2 coding of movies, or which may be used for a high-resolution music disc. For the PAL and NTSC specifications of the DVD, different audio coding has been chosen to obey market patterns. For the NTSC version, the Dolby AC-3 coding will be mandatory, with MPEG audio as an option, whereas the opposite is true for PAL and SECAM markets.
Industry:Entertainment
An SVGA mode for which each pixel color value is specified directly by the contents of a bit field.
Industry:Entertainment
A video signal represented by computer-readable binary numbers that describe colors and brightness levels.
Industry:Entertainment
A feature that lets you see the video full screen and full motion on your computer screen while editing. Most new 3D graphics cards support this. If your’s does not, it simply means you will need an external monitor to view the video. Direct Draw Overlay has absolutely nothing to do with your final video quality.
Industry:Entertainment
a) A system developed in Europe for digital television transmission, originally for standard definition only, though high-definition modes have now been added to the specification.
DVB defines a complete system for terrestrial, satellite, and cable transmission.
Like the ATSC system, DVB uses MPEG-2 compression for video, but it uses MPEG audio compression and COFDM modulation for terrestrial transmission. b) At the end of 1991, the European Launching Group (ELG) was formed to spearhead the development of digital TV in Europe. During 1993, a Memorandum of Understanding was drafted and signed by the ELG participants, which now included manufacturers, regulatory bodies and other interest groups. At the same time, the ELG became Digital Video Broadcasting (DVB). The TV system provided by the DVB is based on MPEG-2 audio and video coding, and DVB has added various elements not included in the MPEG specification, such as modulation, scrambling, and information systems. The specifications from DVB are offered to either ETSI or CENELEC for standardization, and to the ITU.
Industry:Entertainment
Method of gaining direct access to main storage in order to perform data transfers without involving the CPU.
Industry:Entertainment
a) Tape width is 1/4", metal particle formula.
The source and reconstructed video sample rate is similar to that of CCIR-601, but with additional chrominance subsampling (4:1:1 in the case of 30 Hz and 4:2:0 in the case of 25 Hz mode). For 30 frames/sec, the active source rate is 720 pixels/lines x 480 lines/frame x 30 frames/sec x 1.5 samples/pixel average x 8 samples/pixel = ~124 Mbit/sec. A JPEG-like still image compression algorithm (with macroblock adaptive quantization) applied with a 5:1 reduction ratio (target bit rate of 25 Mbit/sec) averaged over a period of roughly 100 microseconds (100 microseconds is pretty small compared to MPEG’s typical 1/4 second time average!) b) A digital tape recording format using approximately 5:1 compression to produce near-Betacam quality on a very small cassette. Originated as a consumer product, but being used professionally as exemplified by Panasonic’s variation, DVC-Pro.
Industry:Entertainment
