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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 first state in converting a broadcast television signal into baseband video and audio.
Industry:Software
An on-line document that describes how to use a particular IRIX or UNIX command.
Industry:Software
The transducing of the information in a real image into the photographic or electronic medium. Normally in motion-reproducing systems, synchronous audio information is simultaneously transduced.
Industry:Software
Scanning lines or lines of resolution. The latter are hypothetical lines alternating between white and black (or, in the case of chroma resolution, between complementary colors). The combined maximum number of black and white lines that might be perceived in a particular direction is the number of lines of resolution. Vertical resolution is measured with horizontal lines; horizontal resolution is measured with vertical lines; diagonal resolution is measured with diagonal lines (no current television system or proposal favors one diagonal direction over the other, so the direction of the diagonal lines does not really matter). See also PPH.
Industry:Software
A DVD has the ability to store eight audio streams. This is different than the number of channels each stream might have. Thus, each of the streams might contain a multi-channel audio program in a separate language.
Industry:Software
Signal nonlinearity characterized by the appearance of frequencies in the output equal to the sums and differences of integral multiples of the component frequencies present in the input signal.
Harmonics are usually not included as part of the intermodulation distortion.
Industry:Software
Fractional value used as part of a floating point number. For example, the mantissa in the number 0.9873 x 107 is 0.9873.
Industry:Software
a) Process used to reduce the amount of memory required to store an image. See JPEG, MPEG, and Decimation.
b) Application of an appropriate transfer function to the image signal so as to limit dynamic range. c) Application of bandwidth limiting or bit rate reduction to an image signal in order to bring it within the limitations of a lower capacity channel.
Industry:Software
In the scanning of a video image, the line number associated with the format is the total number of lines assigned to one frame. It is in fact a timing specification defining the conjunction with the field frequency the time interval allocated to each horizontal line (commonly measured in number of samples at the specified sampling rate or in microseconds). Some of these lines and intervals carry image information, some from the total assigned are dedicated to operational and control functions, including returning the scanning beam back to the upper left corner to begin the next field. Those allotted time intervals (lines) actually carrying image information or image-associated information such as captioning, image test signals, etc., are the active lines. In further reduction of time allocated to image information, some of each active line is dedicated to the horizontal interval to get the scanning beam to return to the leftedge starting point for the next line and to reaffirm color subcarrier, etc. In the U.S. 525/59.94/2:1/NTSC system, about 7.6% of the total field or frame time is assigned to the vertical interval, and about 16% to the horizontal interval. Thus, the 525 television lines per frame provide about 480 active lines. Correspondingly, each active line displays image data about 84% of its time interval. Image information is thus conveyed for only about 76.4% of the total time. In digital encoding, it may be possible to reduce the number of bits assigned to the vertical and horizontal intervals and achieve significant bit rate reduction.
Industry:Software
A generic term for a mix/effects system that allows multiple video images to be combined into a composite image.
Industry:Software
