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Viz Engine Administrator’s Guide

SAV

See EAV and ANC data.

Standard-definition television or SDTV refers to television systems that have a

resolution that meets standards but not considered either enhanced definition or high

definition.

SDI

Serial digital interface (SDI) refers to a family of video interfaces standardized by the

SMPTE .

SECAM

Séquentiel couleur è mémoire, French for “Sequential Color with Memory”), is an

analog color television system first used in France.

Shader

A shader in the field of computer graphics is a set of software instructions, which is

used by the graphics resources primarily to perform rendering effects. A shader is a

part of the renderer, which is responsible for calculating the color of an object; hence,

the Viz Engine renderer has a shader that handles the video input (normally provided

as interlaced YUV images).

To be able to use the YUV images in a CG scene they need to be RGB , and in addition

they need to be de-interlaced. All this is done by Viz Engine’s shader.

The shader not only takes two, but four input images when it does the color conversion

from YUV to RGB and the de-interlacing. As this is a very heavy process it can only be

done in SD .

SMPTE

Society of Motion Picture and Television Engineers.

SPG

A sync pulse generator (SPG) is a special type of generator which produces

synchronization signals, with a high level of stability and accuracy. These devices are

used to provide a master timing source for a video facility. See Bi-level sync and Tri-

level sync.

Squeezeback

Squeezeback (or squeeze back) is a screen size adjustment process that reduces the

size of a display area to allow other items (such as logos, text crawls or other graphics)

to be seen in the new exposed display area. Squeezebacks are often seen during the

closing credits of a show to introduce the viewer to upcoming content along with other

promotions.

Stereo

Stereophonic sound (often shortened to Stereo) is the reproduction of sound, using two

or more independent audio channels.