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- Number of terms: 20560
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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.
The United Nations specialised agency dealing with telecommunications. At present, there are 164 member countries. One of its bodies is the International Telegraph and Telephone Consultative Committee, CCITT. A Plenary Assembly of the CCITT, which takes place every few years, draws up a list of “Questions” about possible improvements in international electronic communication. In Study Groups, experts from different countries develop “Recommendations” which are published after they have been adopted. Especially relevant to computing are the V series of recommendations on modems (e.g. V.32, V.42), the X series on data networks and OSI (e.g., X.25, X.400), the I and Q series that define ISDN, the Z series that defines specification and programming languages (SDL, CHILL), the T series on text communication (teletext, fax, videotext, ODA), and the H series on digital sound and video encoding.
Industry:Software
One of the task forces of the Internet Activities Board (IAB). The IETF is responsible for solving the shortterm engineering needs of the Internet. It has over 40 working groups.
Industry:Software
One of three types of digital pictures in an MPEG data stream. An I-picture is not predictive and is essentially a snapshot picture. This type of picture generally has the most data of any of the picture types. A picture coded using information only from itself. For that reason, an I-picture can be decoded separately.
Industry:Software
The IRE standard oscilloscope frequency response characteristic for measurement of level. This characteristic is such that at 2 MHz the response is approximately 3.5 dB below that in the flat (low frequency) portion of the spectrum, and cuts off slowly.
Industry:Software
An oscilloscope scale in keeping with IRE Standard 50, IRE 23.S1, and the recommendations of the Joint Committee of TV Broadcasters and Manufacturers for Coordination of Video Levels.
Industry:Software
A) A linear scale for measuring the relative amplitudes of the various components of a television signal. Reference white is assigned a value of 100, blanking a value of 0. b) The values for NTSC composite and for SMPTE 240M are shown in the following table. One IRE unit corresponds to 7-1/7 mV in CCIR System M/NTSC and to 7.0 mV in all other systems. Measurement procedure developed by the Institute of Radio Engineers, the predecessor to the IEEE.
Industry:Software
Silicon Graphics, Inc.’s version of the UNIX operating system. See also System Software.
Industry:Software
One of the advantages of an ISA transfer is that it allows the user to process images as they go through the processor. However, its utility is limited by its low bandwidth, Even under ideal conditions, the ISA transfer requires three to five BCLK cycles at 8 MHz to transfer a single pixel. This represents a severe system throughput penalty; a large percentage of the available (and already limited) bandwidth is consumed by the transfer.
Industry:Software
Multiple reels of tape of the same subject recorded simultaneously from different cameras on different VTRs.
Industry:Software
A) Standard developed by the International Radio Consultative Committee for the digitization of colour video signals. ITU-R BT.601 deals with the conversion from component RGB to YCbCr, the digital philtres used for limiting the bandwidth, the sample rate (defined as 13.5 MHz), and the horizontal resolution (720 active samples).
b) International standard for component digital television from which was derived SMPTE 125M (was RP-125) and EBU 3246E standards. CCIR defines the sampling systems, matrix values, and philtre characteristics for both Y, B-Y, R-Y and RGB component digital television.
Industry:Software
