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    Public CDs Overview

    Public CDs are open documents that are distributed for review and comment by the professional community for a limited time. Distribution of public CDs does not constitute publication, as the material remains work under development. Therefore, public CDs shall not be referred to as a SMPTE Standard, Recommended Practice, or Engineering Guideline. 

    The process is designed to satisfy, among others, the following industry needs:

    • Orient public CDs towards published business-driven requirements
    • Lightweight and nimble process
    • Allow public comment (not just the SMPTE Standards Community) to encourage wide review (and trial implementation)
    • Make it easy to follow the rules, provide a checklist of actions because no-one reads the manual
    • Make it easier for trade bodies to work with SMPTE
    • Validate that documents meet the published requirements
    • Validate that the development of the public CD has followed an agreed process
    • Limit the time that a public CD exists before it becomes a stable document type

    You can read more about public CDs, their purpose and process in an updated SMPTE AG-22 available at https://www.smpte.org/about/policies-and-governance very soon.

    Public CDs are managed in GitHub. Github is used as a store of repositories for SMPTE software projects, as a tool for iterative document development and maintenance, and is used for SMPTE code development as well as issue tracking and resolution.

    Feedback on any of the public CDs can be submitted through the GitHub Issue Tracking feature. 

    Current public CDs:

    Public CD Public Review Period
    SMPTE RP 428-22:20xx D-Cinema Distribution Master – Minimal Timed Text XML Requirements
    Public review period ending no earlier than February 1st, 2022, and no later than June 1st, 2022
    SMPTE ST 429-20:20xx D-Cinema Packaging – MXF Constraints
    Public review period ending no earlier than Feb 1, 2022, and no later than Aug 1, 2022
    SMPTE RDD 59-1:20xx Interoperable Master Format — Application DPP (ProRes)
    Review period started July 9, 2021 and will end no later than July 8, 2024
    SMPTE RDD 59-2:20xx Interoperable Master Format — Application Constraint DPP (JPEG2000) Review period started July 9, 2021 and will end no later than July 8, 2024
    SMPTE ST 2067-60:202x Interoperable Master Format — Application #6 UHDTV program workflow"
    Public review period ending no earlier than April 1st, 2022, and no later than October 1st, 2022
    SMPTE ST 377-4:2012 MXF Multichannel Audio Labeling Framework and companion SMPTE ST 377-41 Multichannel Audio Controlled Vocabulary The review period has ended
    SMPTE ST 377-41 Multichannel Audio Controlled Vocabulary The review period has ended
    SMPTE ST 2067-40 Interoperable Master Format - Application #4 Cinema Mezzanine The review period has ended
    SMPTE ST 2125 IMF Registration Service API Ending no earlier than 20 November 2020, and no later than 20 November 2023
    SMPTE ST 2126 Microservice Status Reporting and Logging Ending no earlier than 20 November 2020, and no later than 20 November 2023
    SMPTE RP 2059-15 Ending no earlier than 10 December 2020, and no later than 10 December  2023