Epiphan DVI2PCIe Duo - Manual (Page 79)

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DVI2PCIe Duo User Guide
 If the video capture workstation CPU usage is too high during web streaming
or if viewers of the web stream notice delays and you have determined that
the delays are not caused by low Internet bandwidth. The delays could be
caused by high CPU usage on the video capture workstation resulting in the
video capture workstation not being able to process all image data. Lossless
compression increases CPU usage, so you can reduce CPU usage during
web streaming by reducing lossless compression.
Note: You cannot change web streaming compression during a web broadcast. You
must stop the stream, adjust the settings and then start the stream again.
Changes made to default web stream compression settings are only visible to viewers
of the web stream. Changing these settings does not change how the video capture
application displays, records, or prints captured images.
14 Advanced Topics
14.1 EDID
Extended display identification data (EDID) is data provided by a video display device
(usually a monitor) to describe its capabilities to a video source. The video source
uses the EDID to determine the capabilities of the monitor and, therefore, to
determine the resolution, color depth and other settings that the monitor will accept.
14.1.1 About EDID
EDID is defined by a standard published by the Video Electronics Standards
Association (VESA). The EDID includes manufacturer name, product type, phosphor
or filter type, timings supported by the display device, display size, luminance data and
(for digital displays only) pixel mapping data. EDID is crucial for DVI sources but
mostly ignored by VGA sources.