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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 nominal video signal amplitude shall be 1.0 volt peak-to-peak (140 IRE units).
Industry:Software
An extensive family of compatible digital coding standards for studio use with current television systems is defined by CCIR Red 601-2, equally applicable to component encoded 525/60 Hz and 625/50 Hz systems. The member of the family to be used for the standard digital interface between main digital studio equipment and for international program exchange (i.e., for the interface with video recording equipment and for the interface with the transmission system) should be that in which the luminance and color-difference sampling frequencies are related in the ratio 4:2:2. Specifications include: Coded Signals; luminance (Y) plus two color-difference signals (CR and CB).
Sampling Frequency; luminance 13.5 MHz, color-difference 6.75 MHz (for each of the two signals); Samples (8-bit) per Digital Active Line; luminance 720, color-difference 360 (for each of CR and CB). Other more detailed specifications are included in CCIR Rec 601-2. Compressed and expanded derivations (4:1:1 and 4:4:4 specifically) are postulated variants with minimum or maximum color information.
Industry:Software
a) A method of changing the distribution of the noise that is due to truncation by premultiplying values. b) In a sound level meter, this is a filter that creates a response that corresponds to the ear’s varying sensitivity at different loudness levels. A weighting corresponds to the sensitivity of the ear at lower listening levels. The filter design weights or is more sensitive in certain frequency bands than others. The goal is to obtain measurements that correlate well with the subjective perception of noise.
Industry:Software
The value assigned to an alternating current or voltage that results in the same power dissipation in a given resistance as DC current or voltage of the same numerical value. Calculated as 0.707 of peak amplitude of a sine wave at a given frequency.
Industry:Software
A flickering of fine horizontal edges caused by interlaced scanning.
A fine line appearing in only one field is presented below the flicker frequency; therefore, it flickers. Twitter is eliminated in line doubling schemes that change from interlaced to progressive scanning, as most of the IDTV schemes do. Interestingly, twitter was much less of a problem in the early days of NTSC, than it is today, because early cameras and displays didn’t have sufficient detail to confine an edge to one scanning line.
Industry:Software
A phenomenon caused by simultaneously displaying more than one bitmap or video that do not share the same palette.
Industry:Software
This video format is often used in low-cost video phones. This format has a luminance resolution of 176 x 144 active pixels per line, a refresh rate of 29.97 frames per second at uncompressed bit rate of 9.115 Mbits/s.
Industry:Software
The polarity of the signal shall be positive, i.e., so that black-to-white transitions are positive going.
Industry:Software
