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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.
A key wherein the keying signal is derived from the instantaneous luminance of a video signal after chroma has been filtered out. That is, for a particular clip level, all parts of a scene that are brighter than that level will appear keyed in, leaving background video everywhere else.
Industry:Software
A description of a picture with abnormal or spurious pixel values.
The picture’s noise is a random variation in signal interfering with the information content.
Industry:Software
The bit that has the least value in a binary number or data byte. In written form, this would be the bit on the right. For example: Binary 1101 = Decimal 13 In this example, the rightmost binary digit, 1, is the least significant bit, here representing 1. If the LSB in this example were corrupt, the decimal would not be 13 but 12.
Industry:Software
A test signal with a linear rise in luminance and constant chrominance as shown in the figure below. This signal is used to test for Differential Phase distortions.
Industry:Software
A) The video that fills a key. Also used to describe the key itself.
Insert for most keys is “self,” that is, a key that is filled with the same video that cuts the hole. Ampex switchers also allow “matte” fill with an internally generated colour and “bus fill” where any bus source may be selected to fill the key. b) An edit mode meaning to record a new video over a certain section of an existing video where the entry and exit are both defined and no new time code of control track is recorded.
Industry:Software
Noise which manifests itself in a video picture as white snow, typically caused by one of the following situations: low signal level due to poor lighting conditions, poor video signal processing, low quality videotapes, excessively long video cables used without precompensation, dirt on the video recorder heads which interferes with reading and writing, over-enhancement of the video signal.
Industry:Software
Noisy video (e.g., video from low quality VTRs) is more difficult to code than the cleaner version of the same sequence. The reason is that the video encoder spends many bits trying to represent the noise as if it were part of the image. Because noise lacks the spatial coherence of the image, it is not coded efficiently.
Industry:Software
Named for Bernard Lechner, researcher at RCA Laboratories. The Lechner distance is nine feet, the typical distance Americans sit from television sets, regardless of screen size. The Jackson distance, three meters, named for Richard Jackson, a researcher at Philips in Britain, is similar. There is reason to believe that the Lechner and Jackson distances are why HDTV research was undertaken sooner in Japan (where viewing distances are shorter) than elsewhere. See also Viewing Distance.
Industry:Software
A) The imposing of a signal on some type of transmission or storage medium, such as a radio carrier or magnetic tape. b) The process (or result) of changing information (audio, video, data, etc.) into information-carrying signals suitable for transmission and/or recording. In NTSC-M television transmission, video is modulated onto a picture carrier using amplitude modulation-virtual sideband, and audio is modulated onto a sound carrier using frequency modulation.
Industry:Software
The process of television post-production that combines audio and video signals on an existing control track.
Industry:Software
