DCI Specs - Digital Cinema Initiatives

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3.4.3. Timed Text Concepts and Requirements3.4.3.1. IntroductionTimed Text (e.g., captions and/or subtitles) is text information that may be presented atdefinite times during a Digital Cinema presentation.3.4.3.2. File FormatTimed Text data is required to be encoded as a standardized, XML-based document.Note: This provides for presentation via:• Overlay in main or secondary projector image (open), or• External display (closed)3.4.3.3. RestartThe Digital Cinema equipment and Timed Text file is required to re-synchronize after arestart of the system.3.4.3.4. Default FontFont files are required to be used to render Timed Text for subtitle applications. Fontfiles can be used to render Timed Text for caption applications. When used, font files arerequired to conform to [ISO/IEC 00000 OpenType 6 ]. Timed Text files are required to beaccompanied by all font files required for reproduction of the Timed Text.The Timed Text file format is required to support a default character set. It is requiredthat there be a default Unicode character set and a default font for that character set.In event that an external font file is missing or damaged, the subtitle rendering device isrequired to use a default font supplied by the manufacturer. The default character set isrequired to be a Unicode ISO Latin-1 character set. The default font is required toconform to [ISO/IEC 00000 OpenType] and support the ISO Latin-1 character set.3.4.3.5. IdentificationThe Timed Text format requires the cardinal language of the text to be identified.3.4.3.6. SearchabilityA pure text stream is encouraged to isolate content from rendering markup forsearchability.3.4.3.7. Multiple CaptionsThe Timed Text format shall allow the display of multiple captions simultaneously. Thereshall be a maximum number of 3 lines of text allowed for simultaneous display.Note: This allows for spatial representation for captions when two people are talkingsimultaneously.6 OpenType specification is a work-in-progress. Number will be added when completed.DCI Digital Cinema System Specification v.1.2 Page 36
3.4.3.8. SynchronizationThe equipment or system that encodes or decodes the Timed Text file is required toensure that temporal transitions within the data stream are correctly synchronized withother associated DCDM data streams.3.4.4. Show Control Concepts and RequirementsCurrent day control systems, usually called automation systems, orchestrate theater subsystemssuch as curtains, masking and lights. Digital Cinema control methods are expectedto differ significantly from those found in theaters today. Supervisory types of control will bemuch broader in application than in today’s systems, allowing interface to specializedcontrols for theatrical events.Many of these concepts and requirements are covered in Section 5 PACKAGING andSection:7 THEATER SYSTEMS. Some of the fundamental information pertaining toencoding is covered here, with the detailed information for its use covered in Section 7THEATER SYSTEMS3.4.5. Show Controls3.4.5.1. IntroductionMany of today’s automation controls are driven by a time-based event list such as thesystem's Show Playlist, and can be classified by their show control functions, as in thepartial list below.• First frame of content• First frame of intermission• First frame of end credits• First frame of end credits on black• Last frame of contentShow control events or cues are required for the theater system operator to pre-programthe timing of show control events. Such events or cues may indicate events such as thebeginning of the title, beginning of the intermission, beginning of the credits, and the endof the feature. The events or cues will normally be placed into the Digital CinemaComposition Playlist, as defined in Section:5 PACKAGINGDCI Digital Cinema System Specification v.1.2 Page 37
Page 1 and 2: Digital Cinema Initiatives, LLCDigi
Page 3 and 4: Table of Contents1. OVERVIEW 151.1.
Page 5 and 6: 5.2.2. Packaging Fundamental Requir
Page 8 and 9: 7.5.5.1. Introduction..............
Page 10 and 11: 9.4.2.5. Screen Management System (
Page 12 and 13: Table of FiguresFigure 1: System Ov
Page 14 and 15: THIS PAGE LEFT BLANK INTENTIONALLYD
Page 16 and 17: equirements for encrypting the esse
Page 18 and 19: • This document specifies a basel
Page 20 and 21: DCI Digital Cinema System Specifica
Page 22 and 23: 2.1.1. Major System Concepts2.1.1.1
Page 24 and 25: 2.1.1.8. ReelsFeature films have be
Page 26 and 27: Metadata within the DCDM provides a
Page 28 and 29: 3.2.1.6. Transfer FunctionThe CIE X
Page 30 and 31: The information, as shown in Table
Page 32 and 33: AES Pair#/Ch# Channel # Label / Nam
Page 34 and 35: 3.3.4. File Format3.3.4.1. GeneralT
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 82 and 83: With the projector turned off or wi
Page 84 and 85: Image ParametersNominal(Projected I
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Input Code Values Output Chromatici
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8.4. Projector Interfaces8.4.1. Int
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• Lens Shift Up / Down• Lamp Mo
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• Essence Encryption and Cryptogr
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content keys and Trusted Device Lis
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Figure 14: Digital Cinema Security
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Figure 15 presents the two fundamen
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DCI Digital Cinema System Specifica
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9.4.2.3. Media Blocks (MBs)The term
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which TLS-based authentication alon
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working with the security infrastru
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Figure 18: Show Playback Overview9.
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a. Playout shall be fully supported
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9.4.5. Intra-Theater Communications
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4. Projector SPB designs shall not
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the event, and zero all Critical Se
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window) shall be UTC.Security Manag
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. The SM shall independently authen
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6. No broadcast RRP commands shall
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Functions of the Security Manager (
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Note: DCI reserves the right, at so
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• Is required to survive camcorde
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• Log Data - Security event infor
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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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THIS PAGE LEFT BLANK INTENTIONALLYD
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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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