Digital Cinema Initiatives

DCI SYSTEM REQUIREMENTS AND SPECIFICATIONS FOR DIGITAL CINEMA

DCI Specification, Version 1.2 with Errata as of 30 August 2012 Incorporated

 

Digital Cinema Initiatives, LLC (DCI) has adopted a revised Version 1.2 of its Digital Cinema System Specification with errata as of 30 August 2012 incorporated.

The new DCI Specification, Version 1.2 with Errata as of 30 August 2012 Incorporated, dated 10 October 2012, incorporates the 96 erratum previously released for Version 1.2 of the DCI Specification that was dated 7 March 2008. With the integration of these errata into the body of the Specification, readers will now be able to use the Specification without having to cross-reference to these 96 errata.

Future errata will modify the DCI Specification, Version 1.2 with Errata as of 30 August 2012 Incorporated.

Click here for:
Digital Cinema System Specification Version 1.2 with Errata as of 30 August 2012 Incorporated, dated 10 October 2012 (PDF)

Click here for:
Digital Cinema Object-Based Audio Addendum, dated September 9, 2013 (PDF)

Click here for:
DCI Stereoscopic Digital Cinema Addendum, Version 1.0, dated July 11, 2007 (PDF)


 

ERRATA TO DCI DIGITAL CINEMA SYSTEM SPECIFICATION
VERSION 1.2 WITH ERRATA AS OF 30 AUGUST 2012 INCORPORATED

Errata items continue to be evaluated and will be posted after agreement by the DCI membership that the specific erratum needs to modify the DCI Digital Cinema System Specification, Version 1.2 With Errata As Of 30 August 2012 Incorporated. Suggested Erratum issues may be emailed to dci.info@dcimovies.com. Please include "Errata" in the subject line.

DCI SPECIFICATION ERRATA LISTING 1 and 2 Approved: 21 AUGUST 2013

pdf DOWNLOAD: ERRATA #1 and #2, Approved: 21 AUGUST 2013

DCI SPECIFICATION ERRATA LISTING 3-9 Approved: 04 SEPTEMBER 2014

pdf DOWNLOAD: ERRATA #3 to #9, Approved:04 SEPTEMBER 2014

pdf DOWNLOAD: CHAPTER 9 REPLACEMENT

pdf DOWNLOAD: "changes-marked" document
This is a draft document that shows the differences (additions and deletions) between chapters 7 and 9 of the previous DCI Specification, Version 1.2 with Errata as of 30 August 2012 Incorporated, and the current version of the DCSS noted above. The actual documents (not this "changes-marked" document) are the definitive expressions of their respective DCSS versions and prevail in the event any interpretation is required.

DCI SPECIFICATION ERRATA LISTING #10-#13, Approved: 26 AUGUST 2015

ERRATA  #10 to #13, 26 AUGUST 2015 DOWNLOAD: ERRATA #10 to #13, Approved: 26 AUGUST 2015
Note: Page numbers of this errata reference Replacement Chapter 9 of Erratum 9

DCI SPECIFICATION ERRATA LISTING #14, Approved: 25 SEPTEMBER 2015

ERRATA #14 25 SEPTEMBER 2015 DOWNLOAD: ERRATA #14 Approved: 25 SEPTEMBER 2015
Note: Page numbers of this errata item reference Replacement Chapter 9 of Erratum 9
Also see September 25 2015 Revisions to The CTP

DCI SPECIFICATION ERRATA LISTING #15-23, Approved: 31 MARCH 2016

ERRATA #15-23 31 March 2016 DOWNLOAD: ERRATA #15-23, Approved: 31 MARCH 2016
Note: Page numbers of this errata item reference Replacement Chapter 9 of Erratum 9

ALL ERRATA TO DCI DIGITAL CINEMA SYSTEM SPECIFICATION
VERSION 1.2 WITH ERRATA AS OF 30 AUGUST 2012 INCORPORATED
Erratum Spec. 1.2
with Errata
Incorporated
Page No.
Section(s) Affected Description

1

26

Section
3.3.3

Section 3.3.3 is replaced in its entirety with the following:
3.3.3. Channel Labeling and Channel Routing

Channel labeling indicates where an audio channel is to be reproduced in an auditorium. Channel routing is the process of using these labels to direct each audio channel to the Media Block output that corresponds to the intended loudspeaker or device.

The playback device is required to perform channel routing.

The channel labels and schema in SMPTE ST 429-2 "D-Cinema Packaging-DCP Operational Constraints" shall be utilized.

2

100

Section
9.4.3.5

The following sentence is added to the end of item #5 (i.e., below "b. Audio - Process..."):

The SM shall prevent playout of encrypted content for which the image and sound integrity pack metadata is not present per the requirements of Section 5.3.2.1.

3

100

Section
9.4.3.5

Erratum # 2 has been incorporated into Erratum # 9 (the replacement Chapter 9) and Erratum # 2 is therefore deprecated.

4

64

Section
7.5.4.1

The third and fourth paragraphs of this section shall be replaced with the following (the fourth paragraph remains between Figures 11 and 12):

The Image Media Block can be implemented in a server configuration, as shown in Figure 11. This is where the storage and the Image Media Block are closely coupled. In this configuration, the content data is then pushed to the projector. In this configuration, Link Encryption is required to protect the uncompressed content.

The Image Media Block can also be implemented as a component within the projection system. This provides the option of not requiring Link Encryption. In this configuration, the Image Media Block may use a push or pull method to process essence data from storage, as shown in Figure 12.

5

64

Section
7.5.4.1

In Figure 11, the "FM" with asterisk reference from the Projection System, and the associated " *optional " notation, are removed.

6

65

Section
7.5.4.1

The following paragraph is inserted above the "Note" at the top of page 65:

In addition to the two single Image Media Block (IMB), single projector configurations shown above, this specification provides for Multiple Media Block (MMB) configurations to support multiple projectors and/or the use of an Outboard Media Block (OMB) within the projection booth. See Chapter 9 "SECURITY" for details of MMB and OMB requirements and operation.

7

65

Section
7.5.4.2.1

The following shall replace the existing text of this section:

A Media Block is the device that converts, in real time, the packaged content data from storage into data for playback to downstream devices. The one or more Media Block(s) of the projection booth are required to playback the image, audio and other time-dependent content in a manner that presents a synchronized performance to the audience. Synchronization requirements are as follows:

  • Synchronization of audio and on-screen text to image shall be frame accurate.
  • Synchronization of audio objects shall be accurate to within 10 microseconds (sample accuracy at 96K).
  • The synchronization signal shall include information that represents the current position within the show timeline and shall be accurate to within 10 microseconds.
  • "Locate and play" shall be supported.
  • The synchronization signal shall be defined separately from any essence it may be asked to synchronize, and able to sync multiple media blocks regardless of the essence they are handling.

The sync signal shall be defined independently of an interface or transport mechanism.

8

65

Section
7.5.4.2.2

The following paragraph shall replace the first paragraph of this section:

The main function of a Media Block is to provide a secure environment within which to perform content essence decryption. In support of this Media Blocks shall contain a Security Manager, media decryptor(s) and (as applicable) associated forensic markers. Link Encryption shall be applied to image essence if the associated Media Block is not contained within the projection system.

9

79-148

Section
9.1-9.8
All of Chapter 9

The DCI document DCSS-replacement_Chapter_9--20140904.pdf replaces Chapter 9 in its entirety

10

105

Section
9.4.3.6.3

The last sentence of #5 is removed.

11

106

Section
9.4.3.6.4

The last sentence of #3 is removed.

12

117

Section
9.4.6.1.1

The last two bullets of this section are replaced with:

  • Each instance of a Forensic Marking application shall include a unique 19 bit minimum "location" Forensic Marking Identification (FMID), derived as follows:
    1. The FMID value shall be derived from an integrated unique parameter permanently associated with the Forensic Marking application. The FMID shall meet the following requirements:
      • It shall be manufactured such that it cannot be changed or reprogrammed by any means whatsoever without violation of the SPB's type-1 perimeter.
      • Manufacturers of SPBs containing Forensic Markers shall maintain and make available an accurate, timely database associating each integrated FMID with its associated SPB serial number and digital certificate.
      • Forensic Marking licensors shall ensure the uniqueness of FMIDs.
    2. [This item left blank intentionally.]
  • In multiple projection situations the optically combined Forensic Marks as projected shall meet the same "general" and "survivability" requirements as defined herein for single projector applications.

13

126

Section
9.5.1.1

All bullets of this section are replaced with:

  • Image Media Block (IMB) - SM
  • Image Media Block with Link Encryptor - SM LE
  • IMB with OBAE processor – SM OBAE
  • IMB with OBAE & LE – SM OBAE LE
  • Outboard Media Block (OMB) with OBAE processor - OBAE
  • Link Decryptor Block - LD
  • Image Processor - LD LE
  • Projector to be married - PR
  • Projector permanently married to an IMB - PR SM
  • Projector permanently married to an LDB - PR LD

Note:

  • The designation of other roles is optional.

14

130

Section
9.5.2.5

The following is added as a new first bullet:

  • Nr 1 - Cryptographic Module Specification shall only be required to meet Security Level 2 requirements.

15

45

5.3.6

The last sentence of this section is replaced with:

Extensions shall adhere to the requirements given in this specification and the Auxiliary Data requirements of [SMPTE ST429-14: "D-Cinema Packaging -- Aux Data File"].

16

97

9.4.3.3

The forth bullet of this section is replaced with:

  • Forensic Marking – Each MB shall apply Forensic Marking to image and audio essence and Aux Data (as applicable) during playback.

17

106

9.4.3.6.3

The second sentence of item 5 of this section is replaced with:

The IMB may optionally perform the functions required to process one or more of the essence types defined in Section 9.4.3.6.4 "Normative requirements: Outboard Media Block (OMB)", item 4. In such case the IMB shall implement all requirements of the OMB section for each such essence type (in addition to the IMB requirements of this section).

18

115

9.4.6.1

The opening sentence of this section is replaced with:

These specifications require that image, audio and Aux Data Forensic Marking (FM) capability be included (as applicable) in each Media Block.

19

119

9.4.6.2

Item #8 of this section is replaced with:
The SM and FM Security Entities shall log the presence or absence of image, audio and Aux Data (AD) Forensic Marking for each encrypted DCP.

20

126

9.5.1

The first two sentences of this section are replaced with:

A Digital Cinema Certificate is a declaration by a trusted organization, such as a manufacturer, that the security device is a particular make, model and serial number, and is certified (i.e., found to be compliant to this specification) to perform identified D-Cinema roles. Digital certificates are also the means by which the Security Manager (SM) identifies other Secure Processing Blocks (SPB), and they are additionally used to sign security log records and in establishing Transport Layer Security (TLS) connections.

Each SPB shall be given a D-Cinema identity certificate during the manufacturing process, which shall be (i) permanent to the device (subject to Section 9.5.2.3 "Repair and Renewal") and (ii) unique to the device, for the life of the SPB. See Section 9.5.2.2 "Physical Security of Sensitive Data" for related Secure Silicon SPB private key requirements.

21

126

9.5.1.1

The following sentence replaces the last sentence of the second paragraph:

The make, model and serial number of each certificated device shall be placed on the exterior of said device in a manner that is easily read by a human, and this information shall at all times match that in the device's digital certificate.

22

126

9.5.1.1

The first five bullets of this section are replaced with:

  • Image Media Block or Outboard Media Block - SM
  • Image Media Block with Link Encryptor - SM LE

23

138

9.6.2

The text in this section (including all subsections) is replaced with:

The information previously contained in this section has been deleted as redundant or relocated as needed to other sections of this specification.