Softgenlock: Active Stereo and GenLock for PC Cluster

Allard, Jérémie; Gouranton, Valérie; Lamarque, Guy; Melin, Emmanuel; Raffin, Bruno

Softgenlock: Active Stereo and GenLock for PC Cluster

Files

255-260.pdf (1.05 MB)

Date

2003

Authors

Allard, Jérémie
Gouranton, Valérie
Lamarque, Guy
Melin, Emmanuel
Raffin, Bruno

Publisher

The Eurographics Association

Abstract

In this paper, we present SoftGenLock, an open source software that enables genlock and active stereo on commodity graphics cards. SoftGenLock is implemented on top of Linux. It does not require any hardware modification of the graphics card. Rather than to gain total control on signal generation, which would make the software deeply dependent on the graphics card specification, SoftGenLock applies continuous small modifications to converge and maintain genlocked video signals. To be properly synchronized with each video retrace, SoftGenLock is executed as a real-time task. The genlock signal is propagated along the different machines using the parallel port, a low latency device present on all PCs. It results in a software that only requires access to few specific registers on a graphics card: it can be ported with minimal effort on potentially any graphics card.

        @inproceedings{:10.2312/EGVE/IPT_EGVE2003/255-260
,
booktitle = {Eurographics Workshop on Virtual Environments
},
editor = {Andreas Kunz and Joachim Deisinger
},
title = {{Softgenlock: Active Stereo and GenLock for PC Cluster
}},
author = {Allard, Jérémie and 
Gouranton, Valérie and 
Lamarque, Guy and 
Melin, Emmanuel and 
Raffin, Bruno
},
year = {2003
},
publisher = {The Eurographics Association
},
ISSN = {1727-530X
},
ISBN = {978-3-905674-06-4
},
DOI = {/10.2312/EGVE/IPT_EGVE2003/255-260
}
}