Digital Cinema Initiatives

ANNOUNCEMENTS


 

DCI HDR Image Testing Video

22 February 2022

Members of the Digital Cinema Initiatives (DCI) Technical Committee explain the double-blind image testing that culminated in the numbers used by DCI for minimum black level and peak brightness of a differentiated theatrical High Dynamic Range (HDR) experience. DCI thanks everyone involved in this testing effort for their contributions and opinions. DCI hopes you find the video informative.

Also See: Memorandum on HDR Double-Blind Image Testing Approved 1 July 2021


 

 

 

DCI Releases DCI Specification, Version 1.4.1

Approved for Distribution 13 October 2021
Digital Cinema Initiatives, LLC, Member Representative Committee


 

Digital Cinema Initiatives, LLC (DCI) has published Version 1.4.1 of its Digital Cinema System Specification (DCSS) as of 13 October 2021. DCSS Version 1.4.1 incorporates the 23 errata issued to DCSS, Version 1.4. Future errata will modify the DCSS, Version 1.4.1.

Go to the Current DCI Spec tab to access Version 1.4.1 of the DCSS in PDF and HTML format.


 

DCI Memorandum on Compliance Test Plan (CTP) Confidence Retesting


 

Approved 13 October 2021
Digital Cinema Initiatives, LLC, Member Representatives Committee

 

On 11 May 2018, DCI reissued the "DCI Memorandum on RNG Revocation and Related NIST and FIPS Developments," which included certain exclusions for the Compliance Test Plan (CTP) reexamination related to Confidence Retesting. While this memo remains in effect, it is primarily directed to NIST/FIPS requirements.

The "DCI Memorandum on Compliance Test Plan (CTP) Confidence Retesting" is directed exclusively to Confidence Retesting exclusions and adds a third exclusion item.

Click here for the complete DCI Memorandum on Compliance Test Plan (CTP) Confidence Retesting


 

DCI Releases Revised DRAFT High Dynamic Range and
Revised DRAFT Direct View Display D-Cinema Addenda v.0.96
Approved for Distribution for Comments 1 July 2021
Digital Cinema Initiatives, LLC, Member Representative Committee

 

DCI previously released draft versions 0.9 of these Addenda on 16 November 2018. Having considered industry comments on versions 0.9 and after additional testing, DCI now releases draft versions 0.96 of the High Dynamic Range and Direct View Display D-Cinema Addenda for consideration by interested parties.

These documents are not DCI Specifications. These Draft Version 0.96 documents are distributed for review and comment prior to publication of final DCI specification documents. Please submit comments to DCI by 1 October 2021 via email to image is not clickable to prevent spam.

The proper presentation of a High Dynamic Range Digital Cinema Distribution Master (HDR-DCDM) requires the definition of an HDR Reference Display and controlled environment. This DRAFT specification defines the HDR Reference Display and specifies the tolerances around the critical image parameters for Review Rooms and Exhibition Theaters so that consistent and repeatable color quality can be achieved.

D-Cinema Direct View Displays provide the potential for an improved high-quality image through significantly increased peak luminance and dynamic range, but may also be used to present legacy content. This DRAFT specification defines performance requirements for such displays that are unique to D-Cinema Direct View Displays. These requirements will ensure interoperability and consistent quality of image content on the new generation of d cinema displays.

Click here for DCI DRAFT High Dynamic Range D-Cinema Addendum version 0.96 (PDF)

Click here for DCI DRAFT Direct View Display D-Cinema Addendum version 0.96 (PDF)


 

 

DCI Releases Memorandum on HDR Double-Blind Image Testing
Approved 1 July 2021
Digital Cinema Initiatives, LLC, Member Representatives Committee

 

For the past several years, Digital Cinema Initiatives, LLC (DCI) has been working to determine appropriate criteria for next-generation projection and display specifications, particularly to enable High Dynamic Range (HDR) in the theatrical environment. DCI's efforts were undertaken in response to technological advancements in HDR, filmmaker desires for additional storytelling capabilities, manufacturer requests for guidance, and a desire to further enhance the movie-going experience.

As part of the specification development process, DCI performed a number of double-blind image testing studies to determine the perceptibility of certain technical parameters, particularly black levels and peak brightness.

The purpose of this memorandum is to provide a summary of the process and findings from these testing efforts, how they guided the specification development process, and define peak brightness and black level values for next-generation projectors and displays based on the results.

Click here for DCI Memorandum on HDR Double-Blind Image Testing (PDF)


 

DCI Statement on Technology Evolution in Digital Cinema
 
Approved 29 March 2019
Digital Cinema Initiatives, LLC, Member Representatives Committee

 

DCI has released a "Statement on Technology Evolution in Digital Cinema" providing further background on its draft specifications on High Dynamic Range and Direct View Displays, which were released in November 2018. DCI has extensively evaluated these technologies with an eye to their impact on the digital cinema ecosystem.

The Statement seeks to clarify and further inform the d-cinema industry of DCI's motivations and rationale for these draft specifications. Areas discussed in the Statement include document structure and the draft specification development process, as well as DCI's HDR and Direct View Display evaluation process.

Click here for DCI Statement on Technology Evolution in Digital Cinema


 

DCI issued the Draft HDR Addendum and Draft Direct View Addendum on 16 November 2018 seeking comments from interested parties.

DCI requests that such comments be submitted no later than 31 May 2019. Please submit remarks by email to dci.info@dcimovies.com.

DCI Releases DRAFT High Dynamic Range and DRAFT Direct View Display D-Cinema Addendum
 
Approved for Distribution for Comments 16 November 2018
Digital Cinema Initiatives, LLC, Member Representatives Committee

 

The proper presentation of a High Dynamic Range Digital Cinema Distribution Master (HDR-DCDM) requires the definition of an HDR Reference Display and controlled environment. This DRAFT specification defines the HDR Reference Display and specifies the tolerances around the critical image parameters for Review Rooms and Exhibition Theaters so that consistent and repeatable color quality can be achieved.

D-Cinema Direct View Displays provide the potential for an improved high-quality image through significantly increased peak luminance and dynamic range, but may also be used to present legacy content. This DRAFT specification defines performance requirements for such displays that are unique to D-Cinema Direct View Displays. These requirements will ensure interoperability and consistent quality of image content on the new generation of d cinema displays.

These documents are not DCI Specifications. These Draft Version 0.9 documents are distributed for review and comment prior to publication of a final requirements document by DCI. Recipients of these documents are invited to submit their comments to DCI. Responses should be submitted by email to no scrape.

Click here for DCI DRAFT High Dynamic Range D-Cinema Addendum version 0.9 (PDF)

Click here for DCI DRAFT Direct View Display D-Cinema Addendum version 0.9 (PDF)


 

DCI Memorandum Regarding Direct View Displays
 
Approved 27 June 2018
Digital Cinema Initiatives, LLC, Member Representatives Committee

 

Direct view displays provide the potential for an improved high-quality image through significantly increased peak luminance and dynamic range.

The current Digital Cinema System Specification (DCSS) and Compliance Test Plan (CTP) were crafted with projection systems in mind. With the advent of direct view displays, the associated system architecture and performance characteristics differ from projection systems such that new specifications are necessary. This document broadly defines performance and security parameters that DCI intends to define for these types of displays in order to give manufacturers guidance while a complete set of requirements is developed. Parameters defined in this memo are tentative and subject to change.

Click here for the complete DCI Memorandum Regarding Direct View Displays


 

DCI Image Evaluation Summary

 
Approved 11 May 2018
Digital Cinema Initiatives, LLC, Member Representatives Committee

 

During December 2017, DCI conducted viewing sessions utilizing short clips (approximately 15 to 25 seconds) of existing theatrical content that were chosen based on their suitability for image comparison testing in a higher dynamic range projection environment

Click here for the complete DCI Image Evaluation Summary


 

DCI Memorandum on RNG Revocation and Related NIST and FIPS Developments
Approved 16 March 2017 and 11 May 2018
Digital Cinema Initiatives, LLC, Member Representatives Committee

 

On March 23, 2018, DCI posted revisions to the Compliance Test Plan (CTP) that include new "secure silicon" requirements. Following the "stage 2" 120 day window, these requirements will be enforced as of July 21, 2018. In order to further smooth the transition, DCI is extending the below exclusion and grandfathering clauses to include all secure processing block (SPB) devices, which the Digital Cinema System Specification now requires to employ secure silicon.

Click here for the complete DCI Memorandum on RNG Revocation and Related NIST and FIPS Developments


 

Memorandum of Information Regarding the Secure Silicon Requirement of the DCI Digital Cinema System Specification (DCSS)

Approved 10 May 2018
Digital Cinema Initiatives, LLC, Member Representatives Committee

 

In conjunction with publishing the DCI Compliance Test Plan (CTP) test for Media Block (MB) secure silicon requirements, DCI anticipates there may be questions or concerns as to where to source such single chip integrated circuits (IC). This memo is a guide to NIST site information that lists qualified ICs, and other methods to meet DCSS and CTP secure silicon requirements.

Click here for the complete Memorandum of Information Regarding the Secure Silicon Requirementof the DCI Digital Cinema System Specification (DCSS)


 

DCI Initiatives 9 July 2014

Digital Cinema Initiatives (DCI) provides detail on three of its efforts in the areas of new projection light sources, 3D subtitle rendering and standardized audio formats that are intended to ensure interoperability of distribution packages.

Click here for the DCI Initiatives, dated 9 July 2014 (PDF)


 

DCI-MMB Architecture Description
Approved 26 June 2014

The existing DCI Digital Cinema System Specification (DCSS) security architecture is based on a single Image Media Block (IMB) per projector per auditorium. This is an introduction to an alternative to the current model referred to as the Multiple Media Block (MMB) architecture.

MMB operation enables multiple Media Blocks (MB), each containing a Security Manager (SM), to be used in DCSS compliant projection booths. A new MB type - the Outboard MB (OMB) - is defined for use in MMB configurations.

Click here for:
DCI-MMB Architecture Description, Approved 26 June 2014 (PDF)


 

Response To Industry Inquiries
Regarding
The Digital Cinema Object-Based Audio Addendum
Approved 23 April 2014

The Digital Cinema System Specification (DCSS) defines a projection booth architectural model centered on a single Security Manager (SM) contained within a single Media Block (MB) specified as the Image Media Block (IMB).

DCI recently issued the Digital Cinema Object-Based Audio Addendum, providing basic requirements for how this new essence type can be accommodated within DCI compliant architectures.

This document is a response to industry inquiries regarding the OBAE Addendum and the need to enable efficient implementations while preserving the fundamental architectural tenants important to maintaining security.

Click here for:
Response To Industry Inquiries Regarding The Digital Cinema Object-Based Audio Addendum, Approved April 23, 2014 (PDF)