Christie Spyder Stereoscopic Option 2, User Manual

Page: 9 / 20

Understanding the MirageHD Stereo Mode
Spyder Stereoscopic Option 2 (SSO2) User Manual 9
020-000869-01 Rev. 1 (04-2016)
Understanding the MirageHD Stereo
Mode
How the MirageHD stereo mode works
The MirageHD stereo mode (SSO2) utilizes the frame doubling capability of the Christie MirageHD projector to
alleviate input restrictions and PixelSpace consumption involved with traditional active and passive modes used
with Spyder.
Interleaved Stereo
Note: The usage of the term ‘interleaved’ stereo refers to the Spyder mode which is used to process active
stereo signals when running the SSO2 / MirageHD stereoscopic mode. The ‘interleaved’ signal provided to
Spyder is a true active stereo signal running at a standard video frame rate. Because ‘Interleaved’ is a term
Specific to Spyder, source devices Source devices input into the Spyder system should be configured as active
stereo sources.
Overview
An interleaved stereo video signal consists of a single video connection which interleaves a left-eye and right-
eye signal on alternating video frames, and uses a separate sync signal which is used to identify the left and right
eye frames. On graphics cards, the sync signal is typically provided by a 3-pin mini-DIN connector (shown in
figure 1 below).
Figure 1: VESA miniDIN-3 connector
Pin Function
1 +5V DC (secured with 750mA)
2 Ground
3 Stereo Sync
Table 1: miniDIN-3 Pin Description
Since both the left and right eye video frames are interleaved within a single video connection, two frames are
required (a left eye and a right eye frame) to present one full frame of active stereo video. Because of this
frame pairing, the effective frame rate for the video signal is half the original signal’s refresh rate.