Title: Projected Image System Contrast Ratio
Document Number: ANSI/INFOCOMM 3M-2011
Type of Standard: Performance
Status: Under Review
This standard provides metrics for measurement and requirements for minimum contrast ratios for rear and front projection audiovisual projected image systems.
This standard applies to both permanent and temporary installations, defines projected image system contrast ratio and its measurement. This standard defines four contrast ratios based on content viewing requirements: Passive Viewing, Basic Decision Making, Analytical Decision Making, and Full Motion Video. The system contrast ratio refers to the image as it is presented to viewers in a space with ambient light. Metrics to measure and validate the defined contrast ratios are also provided.
The standard puts the needs of the viewer ahead of all other considerations. Its requirements move beyond individual performance factors of a projector and a screen, because the contrast ratio they can deliver is ultimately affected by the light in the space.
This standard provides important metrics for evaluating, planning and designing projected image system installations, setting minimum contrast ratios, and a procedure for measuring the contrast ratio provided by the system.
Publication Date: June 2011
Keywords: Analytical decision making, audiovisual, audiovisual standard, AV, AV system performance, basic decision making, contrast, contrast ratio, detail, digital signage, front projection, full motion video, image contrast, image quality, InfoComm, information, informational display, inspection, passive viewing, presentation, projected image, projector, projection, projection screen, rear projection, system contrast ratio, videoconferencing
Task Group Members:
Alan C. Brawn, CTS®, ISF-C, Brawn Consulting, Moderator
David Aleksandersen, Projection Design
Tim Anderson, 3LCD
Jonathan Brawn, CTS, ISF-C, Brawn Consulting
Ricardo Chen, Canon USA (LCoS)
Michael Davis, Texas Instruments (DLP)
Richard Green, HTDS, CCP-HTPS, Rich Green, Inc. (CEDIA volunteer member)
Greg Jeffreys, Paradigm Audio Visual Ltd. (U.K.)
Christopher Johnson, HTDS, CTS-D, AudioVisions
John Meehan, Panasonic Projector Systems, Inc.
David Pedigo, CEDIA
Don Stewart, CTS, Stewart Filmscreen
Grant Stewart, CTS, Stewart Filmscreen
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