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Terms and Glossary

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M2S

A digital video standard similar to DVB-ASI but using a different method to time incoming data packets. This limits the bit rate of M2S to 100Mb/s

Macrovision

A copy-protection scheme that inhibits illegal copying of analogueueue television programs. Macrovision Corporation developed and licenses the technology.

Master

First generation recording.

Matrix Time Code

See AatonCode

Media Asset Management (MAM)

A database that allows searching and browsing of video and audio content.

Metadata

Technical and contextual data about the audio and video content that is recorded and edited. In the tape world this would have included information written on the tape or notes included in the tape cartridge. In the file-based world it relates to information labelled against the card or file.
Physical Metadata: Card labelling.
Technical Metadata: the facts stored in the file wrapper, e.g. the codec, bitrate and file size.
Descriptive Metadata: Logged information that describes the content of the video/audio.

Microphone

A device used to turn sound wave energy into an electronic signal for recording or transmission.

Mini Jack

3.5mm jack plug and socket system.

Mistracking

Occurs when the video heads do not scan the recorded tracks correctly, causing visible disturbances on the screen. This can usually be eliminated by adjusting the tracking control.

Modulation

A technique for embedding digital information in a radio carrier wave for broadcast.

Modulator

Device to convert audio and video signals into high frequency transmission signals.

Monitor

Video display screen or audio loudspeaker.

Motion compensation (MC)

A step in the MPEG-2 video decompression (decoding) process.

MPEG-2

A digital video and audio compression (encoding) technique defined by the Moving Pictures Expert Group (MPEG).

MSW

Model number prefix for Sony IMX equipment

Multicasting

Generally, multicasting refers to propagation from one source to only a subset of potential destinations. It also means a technique for simultaneously sending multiple DTV programs on a single channel. The frequency used to carry a single analogueueue television program can be used to carry up to six digital programs.

Mux

An abbreviation of 'multiplexing' which is a method of joining of two or more data streams for co-transmission over the same hardware. When used as a noun it describes the device that does the multiplexing. This term is often used synonymously with Embedding when used to describe the process of inserting AES audio into a serial digital video signal

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