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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.
It is used on (B, D, G, H, I) PAL line 23 and (M) NTSC lines 20 and 283 to specify the aspect ratio of the programme and other information. ITU-R BT.1119 specifies the WSS signal for PAL and SECAM system. EIAJ CPX-1204 specifies the WSS signal for NTSC systems.
Industry:Software
To turn on the power switches on the workstation chassis and the monitor.
Industry:Software
A) Process where analogue signals are measured, often millions of times per second for video, in order to convert the analogue signal to digital.
The official sampling standard definition for television is ITU-R 601. For TV pictures 8 or 10 bits are normally used; for sound, 16 or 20 bits are common, and 24 bits are being introduced. The ITU-R 601 standard defines the sampling of video components based on 13.5 MHz, and AES/EBU defines sampling of 44.1 and 48 kHz for audio. b) The process of dealing with something continuous in discrete sections. Sampling is probably best known as the first step in the process of digitization, wherein an analogue (continuous) signal is divided into discrete moments in time. Yet, even analogue television signals have already been sampled twice; once temporally (time being sampled in discrete frames) and once vertically (the vertical direction being divided into discrete scanning lines). If these initial sampling processes are not appropriately filtered (and they rarely are in television), they can lead to aliases. See also Alias, Digitization, and Nyquist.
Industry:Software
Captions, subtitles, or other text that can be displayed or hidden.
Industry:Software
When used to describe television test signals, this term refers to pulses and pedestals which do not have high-frequency chrominance information added to them.
Industry:Software
Any hardware device that requires a parallel cable connexion to communicate with a workstation.
Industry:Software
A) The chips in a computer that contain its working memory. b) Usually used to mean semiconductor read/write memory. Strictly speaking, ROMs are also RAMs. See also Random Access. c) This term has come to mean any semiconductor memory whose write access time is approximately the same as its read access time. This is typically taken to include SRAMs (Static RAMs) and DRAMs (Dynamic RAMs). This definition specifically eliminates memories that cannot be altered at all and memories that require a special fixture for erasing (such as EPROMs).
Industry:Software
A technique for trying an ATV scheme inside a computer without actually building specialised equipment. Some question the validity of ATV simulations.
Industry:Software
Refers to camera lenses with short focal length and broad horizontal field of view.
Industry:Software
A series of tests that automatically cheque hardware components of a system each time it is turned on.
Industry:Software
