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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.
When an analog master videotape is duplicated, the second-generation copy is usually inferior in some way to the master. This degradation appears as loss of detail, improper colors, sync loss, etc.
Limited frequency response of audio/video magnetic tape and imperfections in electronic circuitry are the main causes of generation loss. Higher performance formats (such as 1") exhibit much less generation loss than more basic formats. Digital formats make generation loss negligible because each copy is essentially an exact duplicate of the original. Video enhancing equipment can minimize generation loss. Some video processors pre-enhance the video signal to overcome generation loss.
Industry:Software
a) The process of locking both the sync and burst of one signal to the burst and sync of another signal making the two signals synchronous.
This allows the receiver’s decoder to reconstruct the picture including luminance, chrominance, and timing synchronization pulses from the transmitted signal.
b) The ability to internally lock to a non-synchronous video. AVC switchers allow genlocked fades on the DSK.
Industry:Software
A timed color black output synchronous with the input reference video. The AVC series also provides the DSK genlocked color black. On 4100 series switchers, this also includes composite sync, subcarrier, vertical and horizontal drive pulses, burst flag pulse, and composite blanking.
Industry:Software
Any aberration which causes the reproduced picture to be geometrically dissimilar to the perspective plane projection of the original scene.
Industry:Software
The shape of objects in a picture, as opposed to the picture itself (aspect ratio). With good geometry, a picture of a square is square.
With poor geometry, a square might be rectangular, trapezoidal, pillowshaped, or otherwise distorted. Some ATV schemes propose minor adjustments in geometry for aspect ratio accommodation.
Industry:Software
Satellite orbits 22,300 miles above earth’s equator where satellites circle earth at the same rate the earth rotates.
Industry:Software
A shadowy or weak image in the received picture, offset either to the left or right of the primary image, the result of transmission conditions which create secondary signals that are received earlier or later than the main or primary signal. A ghost displaced to the left of the primary image is designated as “leading” and one displaced to the right is designated as “following” (lagging). When the tonal variations of the ghost are the same as the primary image, it is designated as “positive” and when it is the reverse, it is designated as “negative.” See Multipath Distortion.
Industry:Software
ITU-R BT.1124 standard reference signal found on scan lines 19 and 282 of (M) NTSC systems and on line 318 (B, D, G, H, I) of PAL systems. This signal allows for the removal of ghosting from TVs by filtering the entire transmitted signal based on the condition of the transmitted GCR signal.
Industry:Software
A supplementary point included on the tangent to the acquired point in order to force the line to begin and end on the acquired points.
Industry:Software
A weak, secondary, ghost-like duplicate video image in a video signal caused by the undesired mixing of the primary signal and a delayed version of the same signal.
Industry:Software
