DCI Specs - Digital Cinema Initiatives

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2.1.1.8. ReelsFeature films have been sub-divided for some time into discreet temporal units for filmsystems called reels. This concept and practice will continue in use for the DigitalCinema system. In Digital Cinema, a reel represents a conceptual period of time havinga specific duration chosen by the content provider. Digital Cinema reels can then beelectronically spliced together to create a feature presentation.2.1.1.9. Component DesignFor the purpose of interoperability, the hardware and software used in the DigitalCinema system shall be easily upgraded as advances in technology are made.Upgrades to the format shall be designed in a way so that content can be distributed andplayed on the latest hardware and software, as well as earlier DCI-compliant equipmentinstallations.The Digital Cinema system shall provide a reasonable path for upgrading to futuretechnologies. It shall be based upon a component architecture (e.g., Mastering,Compression, Encryption, Transport, Storage, Playback, Projection), that allows for thecomponents to be replaced or upgraded in the future without the replacement of thecomplete system. It is the intention of this Digital Cinema specification to allow foradvances in technology and the economics of technology advancement.2.1.1.10. Storage and Media BlockStorage and Media Block are components of the theater playback system. Storage is thefile server that holds the packaged content for eventual playback. The Media Block is thehardware device (or devices) that converts the packaged content into the streaming datathat ultimately turns into the pictures and sound in the theater. These two componentscan be physically contained together or they can be physically separate from each other.Media Blocks are secure entities and the specific nature of that security is defined inSection 9: SECURITY.DCI Digital Cinema System Specification v.1.2 Page 24
3. DIGITAL CINEMA DISTRIBUTION MASTER3.1. Overview3.1.1. IntroductionThe Digital Cinema Distribution Master, or DCDM, is a collection of data file formats, whosefunction is to provide an interchange standard for Digital Cinema presentations. It is arepresentation of images, audio and other information, whose goal is to provide a completeand standardized way to communicate movies (compositions) between studio, postproductionand exhibition. A specific instance of a DCDM is derived from a Digital SourceMaster (DSM) that is created as a result of a post-production assembly of the elements of amovie (composition). A DCDM can be transformed into a Digital Cinema Package fordistribution to exhibition sites (see Section 5: PACKAGING). Alternatively, it can be sentdirectly to a playback system for quality control tasks.3.1.2. DCDM System OverviewFor the purpose of documenting the specific requirements and specifications for the DCDM,it is helpful to divide the system into a set of components. The specifications andrequirements for each of these components will be described in the following sections:• Image – The image specification and file format• Audio – The audio specification and file format• Subtitleso Subpicture – The pre-rendered open text specification and file formato Timed Text – The Timed Text data specification and file format3.1.3. Major DCDM ConceptsThe Digital Cinema Distribution Master (DCDM) is the fundamental interchange element inthe system. Since digital mastering technology will continue to change and develop withtime, the DCDM is designed to accommodate growth. There are several areas that will beaffected by the progression of the mastering technology, such as color space, resolution,sampling frequencies, quantizing bit depths and interfaces.In the process of creating feature films, a Digital Source Master, or DSM, is produced. TheDSM creates many elements (e.g., Film Distribution Masters, DCDM, Home Video Mastersand Broadcast Masters). It is not the goal of this specification to define the DSM. Instead, itis recognized that the DSM can be made of any color space, resolution, sampling frequency,color component bit depths and many other metrics.If the content does not meet this DCDM specification, it is the content provider’sresponsibility to convert the DSM into the DCDM specification, defined in this section, beforeit can be used in the Digital Cinema system.A set of DCDM files (image, audio, subtitles, etc.) contains all of the content required toprovide a Digital Cinema presentation. The DCDM provides two functions, an interchangefile format, and a playback format that is directly sent from the Media Block to the projector(this is referred to as DCDM*). For use in interchange, the encoding process can beperformed in real time or non-real time. For use in playback, the DCDM* is logically requiredto playback in real time.DCI Digital Cinema System Specification v.1.2 Page 25
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 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 36 and 37: 3.4.3. Timed Text Concepts and Requ
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
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7.5.6. Audio System7.5.6.1. Introdu
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made up of Theater System devices a
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DCI Digital Cinema System Specifica
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8.2.2.3. Alternative ContentThe pro
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With the projector turned off or wi
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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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DCI Specs - Digital Cinema Initiatives

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