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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.
In order to accurately send a signal through a transmission line, there must be an impedance at the end which matches the impedance of the source and the line itself. Amplitude errors and reflections will otherwise result. Video is a 75-ohm system, so a 75-ohm terminator must be put at the end of the signal path.
Industry:Software
a) The light from a nonselective diffuse reflector (in the original scene) that is lighted by the normal illumination of the scene.
That white with which the display device stimulates reference white of the original scene.
b) In production context, reference white is defined as the luminance of a white card having 90% reflectance and subjected to scene illumination. It is expected that there will be the capability of some discrimination of surface texture or detail within that portion of the transfer function incorporating reference white.
Industry:Software
a) Electronic: Complex post-production may require such large image bandwidths, such storage requirements, and such extensive calculations that it necessitates conduction in non-realtime, off-line.
b) Photographic: Traditionally all photographic post-production has been off-line.
Industry:Software
a) A type of data compression where a string of identical values is replaced by codes to indicate the value and the number of times it occurs. Thus, a string of 70 spaces can be replaced by two bytes. One to indicate the string consists of spaces and a byte to indicate there are 70 of them. Run-Length Coding is not as efficient as DCT for compression of pictures or video, since long sequences of the same values rarely exist in images. Run-Length Coding is part of JPEG, MPEG, H.261, and H.263 compression schemes. b) A coding scheme that counts the number of similar bits instead of sending them individually. c) Coding of data with different numbers of bits. Frequently reoccurring data has the smallest number of bits, data seldom reoccurring have the highest number of bits.
Industry:Software
An intercom system that allows communication between control-room personnel and personnel working on the studio floor.
Industry:Software
The extent to which the output remains free from variations in amplitude. Uniformity is usually specified in terms of the positive and negative deviations from the average output within a roll, and in terms of the deviations in the average outputs between one roll and another.
Uniformity is normally quoted in percent or dB.
Industry:Software
Transmission of data bits in groups along a collection of wires (called a bus). Analogous to the rows of a marching band passing a review point. A typical parallel bus may accommodate transmission of one 8-, 16-, or 32-bit byte or word at a time.
Industry:Software
Total number of distinct characters or numbers used in a numbering system. Same as Base.
Industry:Software
Consists of a regular patch mesh and is created with a single surface creation operation such as extrude, revolve, sweep, and smooth lofts.
Industry:Software
A switch that connects and disconnects a load resistance to a video input, used to terminate the line. In order for a video signal to be correctly transmitted without loss, proper end of line impedance is essential. Amplitude errors and reflections will otherwise result. A 50- or 75-ohm resistor is usually employed to accomplish this. When the termination switch is off, the unterminated video signal is looped to the next device where the signal can be transmitted in parallel. The final device in the chain must be terminated using the termination switch.
Industry:Software
