Glossary - Avaya Scopia XT7100 Deployment Manual

Glossary

1080p
2CIF
2SIF
4CIF
4SIF
720p
AAC
AGC (Automatic Gain
Control)
Alias
Auto-Attendant
Balanced
Microphone
April 2015
See Full HD on page 204.
2CIF describes a video resolution of 704 x 288 pixels (PAL) or 704 x 240
(NTSC). It is double the width of CIF, and is often found in CCTV products.
2SIF describes a video resolution of 704 x 240 pixels (NTSC) or 704 x 288
(PAL). This is often adopted in IP security cameras.
4CIF describes a video resolution of 704 x 576 pixels (PAL) or 704 x 480
(NTSC). It is four times the resolution of CIF and is most widespread as the
standard analog TV resolution.
4SIF describes a video resolution of 704 x 480 pixels (NTSC) or 704 x 576
(PAL). This is often adopted in IP security cameras.
See HD on page 206.
AAC is an audio codec which compresses sound but with better results
than MP3.
Automatic Gain Control (AGC) smooths audio signals through
normalization, by lowering sounds which are too strong and strengthening
sounds which are too weak. This is relevant with microphones situated at
some distance from the speaker, like room systems. The result is a more
consistent audio signal within the required range of volume.
An alias in H.323 represents the unique name of an endpoint. Instead of
dialing an IP address to reach an endpoint, you can dial an alias, and the
gatekeeper resolves it to an IP address.
Auto-Attendant, also known as video IVR, offers quick access to meetings
hosted on MCUs, via a set of visual menus. Participants can select menu
options using standard DTMF tones (numeric keypad). Auto-Attendant
works with both H.323 and SIP endpoints.
A balanced microphone uses a cable that is built to reduce noise and
interference even when the cable is long. This reduces audio disruptions
resulting from surrounding electromagnetic interference.
Comments? infodev@avaya.com
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