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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.
An artefact observed in composite systems employing quadrature modulation and frequency interleaving. As the analogue of crosscolor, cross-luminance results in some of the information carried by the chrominance signal (on colour subcarrier) being subsequently interpreted as fine detail luminance information. A typical visible effect is chroma crawl and visible subcarrier.
Industry:Entertainment
In an (M) NTSC or (B, D, G, H, I) PAL video signal, the luma (black and white) and the chroma (color) information are combined together. To decode an NTSC or PAL video signal, the luma and chroma must be separated. The chroma bandpass philtre removes the luma from the video signal, leaving the chroma relatively intact. This works fairly well except in certain images where the luma information and chroma information overlap, meaning chroma and luminance information occupy the same frequency space. Depending on the filtering technique used, it can be difficult for the philtre to separate the chroma from the luminance information.
This results in some luminance information being interpreted as chroma and some chroma information being interpreted as luminance. The effects of this improper separation of luminance and chroma are especially noticeable when the television scene contains objects with thin, closely spaced black and white lines. As the camera moves across this object, a rainbow of colours will appear in the object indicating the improper separation of the luminance and chroma information.
Industry:Entertainment
A device which divides a signal into two or more frequency bands before low-frequency outputs of a crossover network. The level of each output at this frequency is 3 dB down from the flat section of the crossover’s frequency response curve.
Industry:Entertainment
By cross-play capability is meant the ability to record and reproduce on the same or a different machine; record at one speed and reproduce at the same or a different speed; accomplish the foregoing singly or in any combination without readjustment for tape or transport type.
Industry:Entertainment
A deliberate distortion of colours usually used to achieve unusual matching. By detecting the quadrant the colour is in (by normally deciding whether R-Y and B-Y are positive or negative), the amplitude of RY, B-Y just for colours in that quadrant can be changed; hence, the hue and saturation can be changed for those colours without affecting others.
Industry:Entertainment
A) The electronic circuit used to switch video, usually on a bus. b) An electronic switch, usually controlled by a push-button on the panel, or remotely by computer that allows video or audio to pass when the switch is closed.
Industry:Entertainment
A term commonly used for one of the seven regional holding companies established when AT&T divested itself of its local telephone companies. The Baby Bells are: American, Bell Atlantic, Bell South, Nynex, Pacific Telesis, Southwestern Bell, and US West.
Industry:Entertainment
A device used to correct problems related to the chroma of the video signal, as well as colour balance and colour noise.
Industry:Entertainment
This type of modelling is also a boundary representation method available in PictureMaker. The artist can define an object’s cross-section, and then extrude in the longitudinal direction after selecting an outline to define the cross-section changes in scale as it traverses the longitudinal axis.
Industry:Entertainment
A physical repositioning of the CCD, the camera element that translates light into electronic pulses for recording on videotape. The effect is to lengthen or shorten the distance between the lens and the CCD.
Industry:Entertainment
