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Chapter 2: AVoption Hardware Overview

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chapter 2

AVoption Hardware Overview

AVoption hardware consists of two cards:

an Avid Broadcast Video Board (ABVB), and

a Janus Advanced JPEG Compression card.

These cards connect with a ribbon cable.

AVoption Hardware

Capabilities

AVoption hardware does the following:

• Receives composite or component video

signal

• Digitizes incoming video

• Compresses digitized video using ad-

vanced JPEG compression

• Outputs composite and component

video signals

• Connects to a second VGA monitor (op-

tional) for computer screen display

Avid Video Resolutions (AVR)

The ABVB captures and plays back video

media with JPEG compression technology,

expressed as Avid Video Resolution (AVR)

levels, in the MSM media format (Media

Composer 7.x-compatible). AVoption can

import both MSM video and MFM video,

which is generated by AudioVision 4.x and

Media Composer 6.x.

AVR levels dictate the amount of JPEG

compression, which determines image

quality and storage requirements for digi-

tized video.

The following resolutions are available:

• Single-ﬁeld – AVR 2s, AVR 3s, AVR 4s,

AVR 6s, AVR 8s, AVR 9s

• Two-ﬁeld – AVR 12, AVR 70, AVR 70B,

AVR 71, AVR 75, AVR 75B, AVR 77

• Multicamera – AVR 2m, AVR 3m,

AVR 4m, AVR 6m

✽

Lower numbered AVR levels require less

hard drive space but provide lower resolution

than higher numbered AVR levels.

The lowest resolution is AVR 2m, and the

maximum resolution, AVR 77, is consid-

ered to be broadcast quality.

JPEG Compression and Storage

JPEG compression is not constant, but var-

ies according to the complexity of the foot-

age. For example, a medium shot of a talk-

ing head with a simple background would

compress more and use less disk space than

a panning shot of a stadium full of people.

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