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Proceedings Paper

Cross-switching in asymmetrical coding for stereoscopic video
Author(s): Wa James Tam; Lew B. Stelmach; Filippo Speranza; Ronald Renaud
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Paper Abstract

Asymmetrical coding is a technique that can be used to reduce the bandwidth required for transmission and storage of stereoscopic video images. This technique is based on observations that a high level of perceived stereoscopic image quality can be maintained when the quality of the video stream to one eye is reduced. To address issues surrounding eye dominance and viewing comfort, we proposed to balance the inputs to the two eyes by cross-switching the image quality in the two streams over time. Here, we report two experiments on the visibility of cross-switches, for video sequences and random-dot stereograms. In both experiments, we manipulated a) the degree of asymmetry in quality of the video streams by varying image blur, and b) the timing of the cross-switch (either at a scene-cut or during a continuous scene). The viewers' task was to indicate whether the first of the second of a pair of stereoscopic presentations contained a cross-switch. We found that the cross-switch was masked by a scene cut, and that ease of detection depended on the degree of asymmetrical blur. We conclude that asymmetrical coding combined with cross-switching at scene cuts is a practical bandwidth-reduction technique for stereoscopic video.

Paper Details

Date Published: 23 May 2002
PDF: 10 pages
Proc. SPIE 4660, Stereoscopic Displays and Virtual Reality Systems IX, (23 May 2002); doi: 10.1117/12.468022
Show Author Affiliations
Wa James Tam, Communications Research Ctr. Canada (Canada)
Lew B. Stelmach, Communications Research Ctr. Canada (Canada)
Filippo Speranza, Communications Research Ctr. Canada (Canada)
Ronald Renaud, Communications Research Ctr. Canada (Canada)


Published in SPIE Proceedings Vol. 4660:
Stereoscopic Displays and Virtual Reality Systems IX
Mark T. Bolas; Andrew J. Woods; John O. Merritt; Stephen A. Benton; Mark T. Bolas, Editor(s)

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