The MANAGING Workflow - 3D Postproduction: Stereoscopic Workflows and Techniques - page 43

Proxy
Proxy imagery consists of imagery data reduced in i le size and resolution to enable
real-time or near real-time processing and viewing required for postproduction.
Proxy imagery is placeholder imagery that will later be replaced by higher resolution
imagery during the editorial conform process. Depending on the deliverable
specii cations, proxy versions can also be used for i nal deliverables.
Discrete vs. Muxed (Multiplexed)
The i nal distinction centers around how L and R image pairs are combined (or
not) into a single synchronized entity. Discrete 3D imagery refers to separate
L and R imagery either as video i les or as image sequences. Each i le or sequence
contains L or R, but not both.
Muxed (jargon for multiplexed) 3D imagery, on the other hand, combines L and
R into a single frame (again, either as a video i le or as an image sequence).
The idea behind muxing is two fold. First it provides a way of establishing and
maintaining L/R sync. If both L and R are contained in the same unit, it is hard
to lose L/R sync in post. More importantly, muxed 3D imagery creates a single
stream or image sequence for a post tool to process, as opposed to processing
dual (L and R) discrete packages of data. A side effect of the muxing process is
a loss of horizontal and/or vertical resolution depending on the muxing layout:
• Side-by-side
• Over-Under
• Checkerboard
• Line Interleaved
2.2 Elements of the MANAGING Workl ow
Applying the Workl ow-Element model outlined in Chapter 1, let's examine
the managing workl ow in terms of its six component elements:
• Teams
• Techniques
• Tools
• Terms
• Targets
• Tests