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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 range of luminances actually achieved in a display. The system’s overall transfer function is the most informative specification of dynamic range, inasmuch as nonlinear processing has nearly always been applied to the luminance of the reproduced scene.
Frequently, however, the dynamic range, display is estimated by observing the reproduction of a stepped gray-scale having calibrated intervals.
Conventionally, the dynamic range is reported to include every step whose transition can be detected, no matter how miniscule. Human vision is less adept at judging luminance of extended areas, but particularly sensitive to luminance transitions which may even have been exaggerated by edge enhancement. “Resolved steps” may be reported, therefore, even when the perceived luminance difference between the areas of adjacent steps is not obvious.
Industry:Entertainment
The range of luminances actually captured in the image is defined and limited by the transfer function which is usually nonlinear. Capture and recording systems traditionally limit their linear response to a central portion of their dynamic range, and may have extended nonlinear shoulder and toe regions. For any scene, it is usually possible to place the luminances of interest on a preferred portion of the transfer function, with excursions into higher and lower limits rolled off or truncated by the respective shoulder and toe of the curve.
Industry:Entertainment
Level adjustment applied to an audio signal in order to limit the difference, or range of the loudest to the softest sounds.
Industry:Entertainment
The amount of spatial resolution available in moving pictures. In most television schemes, dynamic resolution is considerably less than static resolution. See also Motion Surprise, Spatial Resolution, and Temporal Resolution.
Industry:Entertainment
The intelligent truncation of digital signals. Some image processing requires that two signals are multiplied, for example in digital mixing, producing a 16-bit result from two original 8-bit numbers.
This has to be truncated, or rounded, back to 8-bits. Simply dropping the lower bits can result in visible contouring artefacts especially when handling pure computer-generated pictures. Dynamic rounding is a mathematical technique for truncating the word length of pixels, usually to their normal 8-bits. This effectively removes the visible artefacts and is non-cumulative on any number of passes. Other attempts at a solution have involved increasing the number of bits, usually to 10, making the LSBs smaller but only masking the problem for a few generations. Dynamic rounding is a licensable technique, available from Quantel and is used in a growing number of digital products both from Quantel and other manufacturers.
Industry:Entertainment
Bus line that is interconnected with units so that the signal passes from one unit to the next in serial fashion.
Industry:Entertainment
Oscillation which, because the driving force has been removed, gradually dies out, each swing being smaller than the preceding in smooth regular decay.
Industry:Entertainment
General term denoting any or all facts, numbers, letters, and symbols or facts that refer to or describe an object, idea, condition, situation, or other factors. Connotes basic elements of information that can be processed or produced by a computer. Sometimes data is considered to be expressible only in numerical form, but information is not so limited.
Industry:Entertainment
Collection of data from external sensors usually in analogue form.
Industry:Entertainment
Systematic organisation of data files for easy access, retrieval, and updating.
Industry:Entertainment
