- المجال:
- 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.
A device which can combine several signals into one or more composite signals, in any desired proportion.
Industry:Software
A number describing the loss of vertical resolution due to interlace, in addition to any other loss. It is sometimes confused with the Kell factor.
Industry:Software
The property of a magnetic material that causes variations in the residual flux density of a tape to occur with temperature, time, and/or mechanical flexing. Magnetic instability is a function of particle size, magnetization, and anisotropy.
Industry:Software
When time-varying information is sampled at a rate R, the highest frequency that can be recovered without alias is limited to R/2.
Aliasing may be generated by under sampling temporally in frame rate, or vertically in lines allocated to image height, or horizontally in analog bandwidth or in pixel allocation. Intermodulations prior to band limiting may “preserve” some distracting effects of aliasing in the final display. Note: Sampling at a rate below the Nyquist limit permits mathematical confirmation of the frequencies present (as for example in a Fourier analysis of recorded motion). If the sampling window is very small (as in synchronized flash exposure), however, it may become a subjective judgment whether strobing is perceived in the image for motion approaching the limiting velocity (frequency).
Industry:Software
a) Hardware device that captures information and holds it (e.g., group of flip-flops). b) An electronic circuit that holds a signal on once it has been selected. To latch a signal means to hold it on or off.
Industry:Software
A step in post-production during which two or more digital representations are combined to create an edited composition. In a transmission, recording, or reproducing system, combining two or more inputs into a common output, which operates to combine linearly the separate input signals in a desired proportion in an output signal.
: Production: Generally the editing of digital image data, resulting in composites ranging from simple transitions to multilayered collages combining selected information from many interim images. The combining of digital images is accomplished by suitable arithmetic calculations on related pairs of digital words.
: Data Processing: A process of intermingling of data traffic flowing between concentration and expansion stages.
Industry:Software
Alternate raster lines are scanned producing an odd field (odd-numbered lines) and an even field (even-numbered lines). An interlace of 1:1 implies vertically adjacent lines comprise the field.
Industry:Software
The technology and process of recording audio/video information using magnetism as the medium for storage of information. The term is often used to mean the process/capability of both recording and reproduction/playback.
Industry:Software
Maximum rate of transmitting pulse signals through a channel of given bandwidth. If B is the effective bandwidth in Hertz, then 2B is the maximum number of code elements per second that can be received with certainty. The definition is often inverted, in effect, to read “the theoretical minimum rate at which an analog signal can be sampled for transmitting digitally.” Nyquist Rule
Industry:Software
A factor of data access time due to disk rotation. The faster a disk spins the quicker it will be at the position where the required data can start to be read. As disk diameters have decreased, so rotational speeds have tended to increase but there is still much variation. Modern 3-1/2- inch drives typically have spindle speeds of between 3,600 and 7,200 revolutions per minute, so one revolution is completed in 16 or 8 milliseconds (ms) respectively. This is represented in the disk specification as average latency of 8 or 4 ms.
Industry:Software
