DCI Specs - Digital Cinema Initiatives

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With the projector turned off or with the lamp-house doused, measure the luminance offthe center of the screen. The ambient light level of a mastering environment reflected bythe screen is required to be less than 0.01 cd/m 2 (.0029 ft-L).For theatrical environments, the ambient light level reflected by the screen isencouraged to be less than 0.03 cd/m 2 (.01 ft-L). Safety regulations and the placementof exit lights or access lights can result in a higher ambient light level. But, it is noted thatthis will reduce the contrast of the projected image.8.3.3.3. Screen CharacteristicsThe screen is required to be non-specular and equally reflective over the entire visiblespectrum. The screen is required to have variable black masking, adjustable to tightlyframe the projected image. This is required to minimally include 1.85:1 or 2.39:1 imageformats. Masking for other formats is optional.8.3.4. Image Parameters8.3.4.1. IntroductionAll image parameters are required to be measured off of the screen from the center ofthe normal seating area in an exhibition theater. The nominal (reference) parametersand the tolerances for review rooms and theaters are summarized in Table 11:Reference Image Parameters and Tolerances.8.3.4.2. Pixel StructureFor the exhibition theater, the sampling structure of the displayed image is required to becompliant with the image and aspect ratio specifications in 3.2 Image Specification.The device structure (mesh) of the projector picture array is required to be invisible atthe reference viewing distance.8.3.4.3. Peak White LuminanceUsing the white field test pattern (X’=3794, Y’=3960, Z’=3890), adjust the peak whiteluminance, as measured at screen center, to 48 cd/m 2 (14 ft-L), with the measurementmade at the reference viewing position.8.3.4.4. Luminance UniformityUsing the white field test pattern (X’=3794, Y’=3960, Z’=3890), align the lamp house tominimize luminance fall-off from center to corners. The measured luminance of thecorners and sides in a 3 x 3 grid shall be at least 75% of the center, as measured fromthe reference viewing position.Follow manufacturer’s recommendations for digital uniformity correction (if applicable).Measure center to corner uniformity as described in [SMPTE 196E].8.3.4.5. Calibration White PointUsing the white field test pattern (X’=3794, Y’=3960, Z’=3890), measure the white pointchromaticity coordinates of the center of the screen with a spectroradiometer.DCI Digital Cinema System Specification v.1.2 Page 82
8.3.4.6. Color Uniformity of White FieldUsing the white field test pattern (X’=3794, Y’=3960, Z’=3890), measure the chromaticitycoordinates of the center points of a 3 x 3 grid with a spectroradiometer.8.3.4.7. Sequential ContrastThe sequential contrast ratio is computed by dividing the white luminance (of a peakwhite field) by the black luminance (of a black field). The nominal (reference) value isrequired to have a minimum sequential contrast of 2000:1. The tolerances for masteringand exhibition are shown in Table 11: Reference Image Parameters and Tolerances. Inorder to eliminate unwanted detail or discoloration in near blacks, it is critical thatMastering Projectors have an equal or higher sequential contrast than all exhibitionprojectors.Note that this is a measurement of the sequential contrast of the system. It includes theprojector and the ambient light on the screen.DCI Digital Cinema System Specification v.1.2 Page 83
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Digital Cinema Initiatives, LLCDigi
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Table of Contents1. OVERVIEW 151.1.
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5.2.2. Packaging Fundamental Requir
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7.5.5.1. Introduction..............
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9.4.2.5. Screen Management System (
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Table of FiguresFigure 1: System Ov
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equirements for encrypting the esse
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• This document specifies a basel
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DCI Digital Cinema System Specifica
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2.1.1. Major System Concepts2.1.1.1
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2.1.1.8. ReelsFeature films have be
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Metadata within the DCDM provides a
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3.2.1.6. Transfer FunctionThe CIE X
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The information, as shown in Table
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Page 34 and 35: 3.3.4. File Format3.3.4.1. GeneralT
Page 36 and 37: 3.4.3. Timed Text Concepts and Requ
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Page 40 and 41: • All decoders shall decode each
Page 44 and 45: 5.2.2.3. InteroperableThe Packaging
Page 46 and 47: Figure 6: Example Show PlaylistThe
Page 48 and 49: Length (Value Length), followed by
Page 50 and 51: which it was stopped or paused. It
Page 52 and 53: 5.3.4.2. Frame BoundariesThe Audio
Page 54 and 55: • Rating• Aspect Ratio• Image
Page 56 and 57: • Annotation Text parameter (opti
Page 60 and 61: 7.2.3.1. ReliabilityA key part of t
Page 62 and 63: • Country• Rating• Aspect Rat
Page 64 and 65: facility, while the system is in op
Page 66 and 67: Exhibitor and the Distributor, data
Page 68 and 69: 7.5.2.2. Ingest InterfacesExcept fo
Page 70 and 71: (channels) * hours * 60 min/hour *
Page 72 and 73: 7.5.4.2.4. UnpackagingAny packaged
Page 74 and 75: 7.5.6. Audio System7.5.6.1. Introdu
Page 76 and 77: made up of Theater System devices a
Page 78 and 79: DCI Digital Cinema System Specifica
Page 80 and 81: 8.2.2.3. Alternative ContentThe pro
Page 84 and 85: Image ParametersNominal(Projected I
Page 86 and 87: Input Code Values Output Chromatici
Page 88 and 89: 8.4. Projector Interfaces8.4.1. Int
Page 90 and 91: • Lens Shift Up / Down• Lamp Mo
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Page 94 and 95: content keys and Trusted Device Lis
Page 96 and 97: Figure 14: Digital Cinema Security
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Page 102 and 103: 9.4.2.3. Media Blocks (MBs)The term
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Page 108 and 109: Figure 18: Show Playback Overview9.
Page 110 and 111: a. Playout shall be fully supported
Page 112 and 113: 9.4.5. Intra-Theater Communications
Page 114 and 115: 4. Projector SPB designs shall not
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Page 118 and 119: window) shall be UTC.Security Manag
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Page 122 and 123: 6. No broadcast RRP commands shall
Page 124 and 125: Functions of the Security Manager (
Page 126 and 127: Note: DCI reserves the right, at so
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using the GetEventList and GetEvent
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failure) per Section 9.6.1.3 Digita
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• Secure Silicon -Sensitive data
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secure silicon chip, input/output s
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FIPS 140-2 level 3 devices provide
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to the appropriate Section 9.4.5.2.
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those under the control of the Secu
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Security Managers (SMs) other than
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The above RSA asymmetric protection
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CPRL Acronym for Component Position
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LTCMain TitlesMBMDMEMetadataMTBFMXF
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TDLTimed TextTLMTLSTMSTrack FileUDP
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DCI Specs - Digital Cinema Initiatives

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