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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.
A) Coding where analogue input signal is represented by a given number of fixed-width digital samples per second.
Often used for the coding employed in the telephone network. b) A technical term for an analogue source waveform, for example, audio or video signals, expressed as periodic, numerical samples. PCM is an uncompressed digital signal. c) This is a form of the digital audio signal used for both CD and laserdisc. It is a serial data stream that is coded for transmission or recording. PCM is also used for many other types of serial data communications.
Industry:Software
The ability to key a subject as a regular chroma key, while using the border channel of the keyer to mix in the low luminance portions of the key signal. This allows a true shadow effect where any shadow in the key video appears as if it is in the background. All Ampex switchers have this feature, with variable shadow levels and densities (bdr adj and bdr lum respectively).
Industry:Software
A system of movable guides that automatically prevents the tape from contacting the recorder’s heads during fast forward or rewind modes of operation, thus preventing head wear.
Industry:Software
A stage in a processor which executes a partial task. For example, a memory pipeline might use pipelined (sequential) stages to calculate the address, read the value of the memory cell, and store the value in a register. A pipeline allows starting the execution of a cycle before a previous cycle has been completed. A processor can start to execute a complex instruction in a pipeline before the preceding instruction has been completed.
Industry:Software
As used by the telephone company, a network designed to remove the effects of predistortion or preemphasis, thereby resulting in an overall normal characteristic.
Industry:Software
A) The specific signal configuration, reference pulses, voltage levels, etc., that describe the input/output requirements for a particular tape of equipment. Some standards have been established by professional groups or government bodies (such as SMPTE or EBU). Others are determined by equipment vendors and/or users. b) A set of rules or characteristics defining a particular television system. Some standards (such as those contained in FCC rules and regulations) are mandatory. Most (including those of the EIA, IEEE, and SMPTE) are voluntary. The establishment of a standard often freezes development at a certain level but allows users and manufacturers to deal with a much larger array of products than might be available without a standard. There is currently one U.S. HDEP standard, the ATSC/SMPTE 1125 scanning-line system. CCIR system E is an HDTV transmission standard, used in France, calling for 819 scanning lines in a 14 MHz bandwidth.
Industry:Software
A decoder having a certain amount of buffer memory assumed to be present by an encoder.
Industry:Software
The amplitude ratio between a 2T pulse and a line bar is sometimes used as an indication of short time distortion. The results of this measurement can be described in units of K-2T or K-PB.
Industry:Software
A perforated metal plate which is mounted close to the inside of a colour CRT display surface. This plate causes the red, green and blue electron beams to hit the proper R, G, or B phosphor dots.
Industry:Software
A length of magnetic tape with the ends joined together to form an endless loop. It makes possible the repetitive playback of a recording without rewinding the tape.
Industry:Software
