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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.
Part of the MPEG-2/DVB standard where half of the normal 720-pixel horizontal resolution is transmitted while maintaining normal vertical resolution of 480 pixels. Since it is a 4:2:0 format, the color information is encoded at 240 pixels vertically and 176 pixels horizontally. Virtually all the DBS providers use HHR format since it dramatically reduces the bandwidth needed for channels, though at the expense of picture quality. Special logic in the video decoder chip in the set top box re-expands the picture to normal horizontal size by interpolation before display. 4:2:2 video at Standard Definition looks as good as the NBC analog feeds on GE-1 Ku. High bandwidth 4:2:0 video such as the NBC digital feeds on GE-1 Ku come very close to studio quality and the low bandwidth video encoded in HHR format looks like DBS.
Industry:Software
Troubleshooting technique used for fault isolation. It involves the examination of circuit nodes approximately midway through a circuit. Once the operational state of these nodes has been determined, the source of the fault can be isolated to the circuits either before or after this point. This process can then be continued.
Industry:Software
Data transmitted in either direction, one direction at a time.
Industry:Software
An early NHK proposal for an ATV transmission scheme.
Industry:Software
a) Most commonly, a dark area surrounding an unusually bright object, caused by overloading of the camera tube. Reflection of studio lights from a piece of jewelry, for example, might cause this effect. With certain camera tube operating adjustments, a white area may surround dark objects. b) Type of pattern border with soft edges and a mix from a vid to border matte gen then to “B” vid.
Industry:Software
a) The protocol that controls the flow of information between two devices. b) Control signals at an interface in which the sending device generates a signal indicating that new information is available, and the receiving device then responds with another signals indicating that the data has been received.
Industry:Software
A form of cross-luminance created by simple comb filters.
It appears as a row of dots hanging below the edge of a highly saturated color. See also Cross-Luminance.
Industry:Software
Audio data transmitted after the silence detector indicates that no audio data is present. Hangover ensures that the ends of words, important for comprehension, are transmitted even though they are often of low energy.
Industry:Software
