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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 NTSC artefact also sometimes referred to as moving dots; a crawling of the edges of saturated colours in an NTSC picture.
Chroma Crawl is a form of cross-luminance, a result of a television set decoding colour information as high-detail luminance information (dots).
Most ATV schemes seek to eliminate or reduce chroma crawl, possibly because it is so immediately apparent.
Industry:Entertainment
The interference between two audio or two video signals caused by unwanted stray signals. a) In video, crosstalk between input channels can be classified into two basic categories: luminance/sync crosstalk; and colour (chroma) crosstalk. When video crosstalk is too high, ghost images from one source appear over the other. b) In audio, signal leakage, typically between left and right channels or between different inputs, can be caused by poor grounding connexions or improperly shielded cables. See Chrominance-to-Luminance Intermodulation.
Industry:Entertainment
Long distance digital data transport service such as Sonet, SDH, or Telecos.
Industry:Entertainment
The process of removing the colour video information from a composite video signal where chrominance information is modulated on a colour subcarrier. The phase reference of the subcarrier, is colour burst which is a phase-coherent sample of the colour subcarrier.
Industry:Entertainment
The signal-to-crosstalk noise ratio is the ratio, in decibels, of the nominal amplitude of the luminance signal (100 IRE units) to the peak-to-peak amplitude of the interfering waveform.
Industry:Entertainment
Refer to the NTSC Composite Receiver Model at the end of this glossary when studying this definition. After the (M) NTSC or (B, D, G, H, I) PAL video signal makes its way through the Y/C separator, by either the chroma bandpass, chroma trap, or comb philtre method, the colours are then decoded by the chroma demodulator. Using the recovered colour subcarrier, the chroma demodulators take the chroma output of the Y/C separator and recovers two colour difference signals (typically I and Q or U and V).
Industry:Entertainment
A) An editing term meaning to bring all source and record VTRs to the predetermined edit point plus pre-roll time. b) An audio mixer function that allows the user to hear an audio source (usually through headphones) without selecting that source for broadcast/recording; the audio counterpart of a preview monitor. c) The act of rewinding and/or fast-forwarding a video- or audiotape so that the desired section is ready for play.
Industry:Entertainment
A switch on some camcorders used to compensate exposure for situations where the brightest light is coming from behind the subject.
This term is also used to refer to a light source that illuminates a subject from behind, used to separate the subject from the background and give them depth and dimension.
Industry:Entertainment
A switch that temporarily disables a recorder’s Tape Lifters during fast forward and rewind so the operator can judge what portion of the recording is passing the heads.
Industry:Entertainment
A) The portion of the video signal that lies between the trailing edge of the horizontal sync pulse and the start of the active picture time. Burst is located on the back porch.
b) The back porch of a horizontal synchronising pulse is that area from the uppermost tip of the positivegoing right-hand edge of a sync pulse to the start of active video. The back porch of a colour video sync pulse includes the 8 to 9 cycles of reference colour burst. The back porch is at blanking level.
Industry:Entertainment
