Digital Video Effects

Prompt

Identify

Television pictures shrink into [floating panels], rotate through space, or appear as picture-in-picture windows. Page turns and [flying cubes] make moving images behave like flexible sheets or solid surfaces.

Principle

Digital processors store video frames in memory, then [remap their pixels] to change size, position, shape, and apparent perspective¹. Compositing² places the transformed picture over another image.

Example

Ampex: ADO (Ampex Digital Optics), 1981.

Try it out

Watch a television transition frame by frame, checking whether the picture changes shape while movement continues inside it.

Background

Digital video effects became a familiar part of television during the 1980s, building on digital equipment developed in the previous decade. Ampex introduced ADO in 1981, helping establish electronically positioned and rotated video pictures as a broadcast design tool. A frame store³ held sampled images while processors calculated new pixel locations. Operators could move pictures across backgrounds without moving a camera or a physical screen. Different systems offered different capabilities; elaborate page turns and cubes were not universal features. These transformations became common in sports coverage, station promotions, and music television.

Distinction

A conventional wipe reveals one picture by moving a boundary across another; it need not distort either image. DVE transforms the picture itself, although a production can combine both techniques.

Aftermath

DVE shows how storing video as numerical samples lets the screen become a movable object within another screen.

Question