Glossary - A Practical Guide to Video and Audio Compression - page 728

Topic Description

DWT Discrete Wavelet Transform.

EBU The European Broadcasting Union governs the standardization

of TV in European markets.

ECMA European Computer Manufacturers Association.

Elementary Stream The video and audio is compressed by the codec to form an

elementary stream that just contains one kind of media. These
are then multiplexed together to form a program stream.

Emblaze An early Java-based codec that was interesting but never

became widely used.

Ensharpen The TechSmith Ensharpen codec is designed for screen-capture

applications. It is quite efficient for that use but has limited
availability across platforms.

Entropy coding The coding of the string of DCT coefficients that are created by

the DCT encode of a macroblock.

Ethernet A networking system for connecting computers together.

Extranet The networking outside of your own internal network or

intranet is called an extranet.

FCIF Full Common Intermediate Format. An alternative to CIF that

qualifies the size in contexts where QCIF might be mentioned
as well.

FEC Forward Error Correction.

Field Dominance The order in which the odd or even fields of an interlaced raster

are presented.

FireWire An interface designed to support hard disks and fast video

transfers. Originally developed by Apple Computer, it has
become ubiquitous as an interface for downloading material
from portable DV cameras.

FlexMux Flexible Timeline Multiplexor introduced with the MPEG-4

systems layer. This allows some very sophisticated interactive
and multimedia services to be constructed and also solves one
major problem with MPEG-2 where timelines in program
streams are difficult to splice and trigger interactive events from.

Forbidden This is an interesting codec that uses edge-based coding.

Technologies Interestingly, as the compression ratio increases and the quality

decreases, the image begins to resemble a cell-animated cartoon
but the edge detail remains until the very last.

Forward motion A motion-compensation vector used when the video is playing

vector forward in the normal way.