Barco Argus X Terminal User Manual

Also see for Argus X Terminal: User manual

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Barco Argus X Terminal User Manual Manual pdf 86 page image

4. OperatingBarco – Argus X Terminal – DOC-3265-2 – user's manual – Revision 04 – May-2004 ________________________________________________________________________ 4-124.6 Displaying video and RGB signalsGB signalsVideo and RGB signals can be displayed on an Barco display wall with the optional input cardsQUAD A NALOG VIDEO CARD, BIG VIDEO CARD , DUAL RGB INPUT CARD and RGB I NPUT CARD . Based on an extension library ofthe X server the Barco video client xvideo allows the convenient handling of analog video and RGB signals.Simultaneous operationSeveral input cards can be operated simultaneously. In this case, the corresponding video windows may freelymultaneously. In this case, the corresponding video windows may freelyoverlap. For large display walls a distributed system with multiple PCI segments may be required.OmniScalerDue to the dual color mode capability of the OMNI S CALER , A RGUS can display video and RGB signals in RGB colormode with 16 bit per pixel while the XX Server operates in 8 bit PseudoColor mode with 256 colors. Please, referto section 4.2 Color management for more details.One OMNI S CALER provides the capability to process up to 128 video and RGB inputs simultaneously.Video and RGB data is triple buffered. Therefore only entire frames are displayed in sync with the graphical datagraphical datato avoid frame tearing.As the OMNI S CALER is used together with graphic with digital output, an A RGUS with graphic cards with analog out-put can not take advantage of the O MNI S CALERS.Backend scalingd scalingThe OMNI S CALER is able to do a backend scaling. Scaling the video data at the backend of data transfer chain (In-put card -> PCI-Bus -> OMNI S CALER ) has its big advantage in a reduced need of PCI Bus bandwidth. Furthermorethe OMNI S CALER provides up-scaling capabilities until full-screen resolution and far beyond.The backend scaling uses linear interpolation for calculating new pixels.In standard configuration the X server, depending on the size of the video window and the type of the input cardze of the video window and the type of the input cardautomatically controls the usage of backend scaling.Dependant on the scaling factor either the OMNI S CALER or the input card scales data. As soon as the size of thevideo or RGB window is larger than 1:1 the OMNI S CALER scales data up to the displayed size. If the video is dis-played in a lower resolution than 1:1, then the input card itself performs a downscaling, to reduce the need ofbandwidth for the data transfer.In a distributed system the display wall is controlled by multiple OmniBus devices. If a videoshall be displayed on modules belonging to different OmniBus devices, all concernedOmniBus devices must be supplied with the video signal.Module videoThe QUAD A NALOG VIDEO CCARD , BIG VIDEO CARD , the DUAL RGB INPUT CARD and RGB I NPUT CARD can also display videosand RGB signals respectively without borders and fitted to complete projection modules (1 to n×n, depending onconfiguration). The display is always »on top«, other applications are »behind« and can not be manipulated byaccident. If the display is removed from the desktop (quit or iconified) all covered applications show up againquit or iconified) all covered applications show up againimmediately. Module Video is especially helpful if an A RGUS with analog output is used, to enable the display ofvideo together with an X server in 8 bit color depth.GenlockThe A RGUS system provides the ability for genlocking. Either a video of the Q UAD A NALOG VIDEO CARD , the clock of aUGX or AGX G RAPHIC CARD or an external studio signal can be used as reference signal. Basic functionality of gen-lock is accessible via the window manager, please refer to section 4.5 Window managerw manager. Access to the completegenlock functionality is explained in section 4.8.8 Genlock utility.