DCI Specs - Digital Cinema Initiatives

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• All decoders shall decode each color component at 12 bits per sample with equalcolor/component bandwidth. Decoders shall not subsample chroma.• A 4K decoder shall decode all data for every frame in a 4K distribution. A decodershall not discard data (including resolution levels or quality layers) to keep up withpeak decoding rates.• A 2K decoder shall decode 2K data for every frame in a 4K distribution and it shalldecode a 2K distribution. It may discard only the highest resolution level of a 4Kdistribution. It shall not discard other data such as further resolution levels or qualitylayers.• All decoders shall implement the 9/7 inverse wavelet transform with at least 16 bitfixed point precision.• All decoders shall implement the inverse Irreversible Color Transform (ICT) using atleast 16 bit fixed point precision.4.4. Codestream SpecificationAll codestreams shall fully conform with [ISO 15444-1:2004/PDAM 1 (soon to be Amendment1)], as more fully constrained as follows:• The capability parameter for a 2K distribution shall be Rsiz = 3, for a 4K distribution itshall be Rsiz = 4.• All image frames shall be untiled. More precisely, the entire image shall be encoded as asingle tile.• The image and tile origins shall both be at (0, 0).• There shall be no more than 5 wavelet transform levels for 2K content and no more than6 wavelet transform levels for 4K content. There shall be no less than one wavelettransform level for 4K content. Additionally, every color component of every frame of adistribution shall have the same number of wavelet transform levels.• Codeblocks shall be of size 32x32.• The codeblock coding style shall be SPcod, SPcoc = 0b00000000.• All precinct sizes at all resolutions shall be 256x256, except the lowest frequencysubband, which shall have a precinct size of 128x128.• There shall be no region of interest, i.e., Region of interest (RGN) marker segments aredisallowed.• Coding style Default (COD), Coding style Component (COC), Quantization Default(QCD), and Quantization Component (QCC) marker segments shall appear only in themain header.• Packed Packet headers, Main header (PPM) and Packed Packet headers, Tile-partheader (PPT) marker segments are forbidden.• The progression order for a 2K distribution shall be Component-Position-Resolution-Layer (CPRL). Progression Order Change (POC) marker segments are forbidden in 2Kdistributions.• For a 4K distribution, there shall be exactly one POC marker segment in the mainheader. Other POC marker segments are forbidden. The POC marker segment shallspecify exactly two progressions having the following parameters:DCI Digital Cinema System Specification v.1.2 Page 40
oooFirst progression:RSpoc = 0, CSpoc = 0, LYEpoc = L, REpoc = D, CEpoc = 3, Ppoc = 4Second progression:RSpoc = D, CSpoc = 0, LYEpoc = L, REpoc = D+1, CEpoc = 3, Ppoc = 4In the above, D is the number of wavelet transform levels and L is the number ofquality layers. The constant 3 specifies the number of color components, and theconstant 4 specifies CPRL progression.Note: This POC marker segment ensures that all 2K data precede all 4K data. Withineach portion (2K, 4K), all data for color component 0 precede all data for colorcomponent 1, which in turn precede all data for color component 2.• Each compressed frame of a 2K distribution shall have exactly 3 tile parts. Each tile partshall contain all data from one color component.• Each compressed frame of a 4K distribution shall have exactly 6 tile parts. Each of thefirst 3 tile parts shall contain all data necessary to decompress one 2K color component.Each of the next 3 tile parts shall contain all additional data necessary to decompressone 4K color component. The resulting compliant codestream structure is diagramed inTable 7. Assuming D wavelet transform levels (D+1 resolutions), the box labeled2K_i (i = 0, 1, 2) contains all JPEG 2000 packets for color component i, resolutions 0through D-1. The box labeled 4K_i (i = 0, 1, 2) contains all JPEG 2000 packets for colorcomponent i, resolution D.MainHeaderTile-partHeader2K_0Tile-partHeader2K_1Tile-partHeader2K_2Tile-partHeader4K_0Tile-partHeader4K_1Tile-partHeader4K_2Table 7: Codestream Structure• Tile-part Lengths, Main header (TLM) marker segments shall be required in all frames ofall distributions.Note: This facilitates extraction of color components and resolutions (2K vs. 4K).• Distribution masters shall have exactly one quality layer.• For a frame rate of 24 FPS, a 2K distribution shall have a maximum of 1,302,083 bytesper frame (aggregate of all three color components including headers). Additionally, itshall have a maximum of 1,041,666 bytes per color component per frame including allrelevant tile-part headers.• For a frame rate of 48 FPS, a 2K distribution shall have a maximum of 651,041 bytes perframe (aggregate of all three color components including headers). Additionally, it shallhave a maximum of 520,833 bytes per color component per frame including all relevanttile-part headers.• A 4K distribution shall have a maximum of 1,302,083 bytes per frame (aggregate of allthree color components including headers). Additionally, the 2K portion of each frameshall satisfy the 24 FPS 2K distribution requirements as stated above.Note: For information purposes only, this yields a maximum of 250 Mbits/sec total and amaximum of 200 Mbits/sec for the 2K portion of each color componentDCI Digital Cinema System Specification v.1.2 Page 41
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 36 and 37: 3.4.3. Timed Text Concepts and Requ
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
Page 86 and 87: Input Code Values Output Chromatici
Page 88 and 89: 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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