In the DVE sense it describes a single co-ordinate control used for changing effects parameters in the 'Z' axis (perpendicular to the screen plane).

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Keying mode when a key signal of the mixer (for instance a diamond shaped wipe pattern) comes from a source other than the video that will eventually fill the hole. The key source, in this case, may be either internal or external.

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Sweep test pattern with linear or non-linear change of spatial frequencies in two orthogonal directions (plus the temporal direction in some variants). The two main zone plate patterns used are Circular (Bulls Eye) and Hyperbolic.

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Optical or digital effect where the image is altered in size, while remaining centered about a defined point. The zoom may either increase or decrease the size of the objects in the image, ignoring its borders or edges (which are a separate consideration).

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Mode of HDTV Down Conversion where the output TV picture is produced from part of an HDTV source picture with on-line control of its size and position.

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Expansion of the picture details within the zoomed picture area.

Synonyms: Expand

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A Zoom effect with objects being decreased in size.

A common Test Pattern component. The Bar looks on a TV screen as a vertical strip, usually specified by color, level and edge rise-time, e. g.: 75% 2T White Bar. Sometimes the bar component is called 'window' or 'box'.

Synonyms: Composite Sync; Sync; Sync Pulses

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