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- Number of terms: 20560
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- Company Profile:
Tektronix provides test and measurement instruments, solutions and services for the computer, semiconductor, military/aerospace, consumer electronics and education industries worldwide.
a) The black burst signal used to synchronize all the devices in the studio or station. b) Sync generated within the studio and used as a reference for generating and/or timing other signals (i.e., sync gens).
Industry:Software
a) A color wheel of basic pigments. All the hues of the rainbow encircle the cone’s perimeter. b) The wavelength of the color which allows color to be distinguished such as red, blue, and green. Often used synonymously with the term tint. It is the dominant wavelength which distinguishes a color such as red, yellow, etc. Most commonly, video hue is influenced by a camera’s white balance or scene lighting. Video color processors, such as the Video Equalizer, are the main tools used to adjust and correct hue problems. c) One of the three characteristics of television color. Hue is the actual color that appears on the screen. See Chroma and Luminance.
d) Attribute of a visual sensation according to which an area appears to be similar to one of the perceived colors, red, yellow, green, and blue, or to a combination of two of them.
Industry:Software
Color space system based on the values of Hue, Saturation, and Intensity. Intensity, analogous to luma, is the vertical axis of the polar system. The hue is the angle and the saturation is the distance out from the axis.
Industry:Software
Nearly identical to HSI except Intensity is called Lightness. Both serve the same function.
Industry:Software
Nearly identical to HSI and HSL except Intensity and Lightness are called Value. All three serve the same function.
Industry:Software
Method of data compression that is independent of the data type, i.e., the data could represent an image, audio, or spread sheet.
This compression scheme is used in JPEG and MPEG-2. Huffman Coding works by looking at the data stream that makes up the file to be compressed.
Those data bytes that occur most often are assigned a small code to represent them (certainly smaller than the data bytes being represented).
Data bytes that occur the next most often have a slightly larger code to represent them. This continues until all of the unique pieces of data are assigned unique code words. For a given character distribution, by assigning short codes to frequently occurring characters and longer codes to infrequently occurring characters, Huffman’s minimum redundancy encoding minimizes the average number of bytes required to represent the characters in a text. Static Huffman encoding uses a fixed set of codes, based on a representative sample of data, for processing texts. Although encoding is achieved in a single pass, the data on which the compression is based may bear little resemblance to the actual text being compressed. Dynamic Huffman encoding, on the other hand, reads each text twice; once to determine the frequency distribution of the characters in the text and once to encode the data. The codes used for compression are computed on the basis of the statistics gathered during the first pass with compressed texts being prefixed by a copy of the Huffman encoding table for use with the decoding process. By using a single-pass technique, where each character is encoded on the basis of the preceding characters in a text, Gallager’s adaptive Huffman encoding avoids many of the problems associated with either the static or dynamic method.
Industry:Software
Undesirable coupling of 50 Hz (PAL) or 60 Hz (NTSC) power sine wave into other electrical signals.
Industry:Software
A set of standards and suggestions for making the working environment more comfortable and healthy.
Industry:Software
a) Any increase or decrease in strength of an electrical signal. Gain is measured in terms of decibels or number of times of magnification.
b) The ratio of output power to the input power for a system or component.
c) The amount of amplification of a circuit. The term gain is often used incorrectly to denote volume and loudness which are psychological factors which are the results of “gain.” Gain Ratio Error
Industry:Software
