Overview
ISO/IEC 23000-21:2019/Amd 1:2021 is an amendment to the internationally recognized standard for multimedia application formats (MPEG-A), specifically focusing on visual identity management application formats. This amendment introduces important updates regarding conformance and reference software for content sensitive encryption (CSE) in audiovisual media. The guidelines and resources provided in this standard enhance the interoperability and security validation of multimedia applications, especially concerning video encryption, compression, and playback.
Key Topics
- Content Sensitive Encryption (CSE): The amendment details the methodology for selectively encrypting the most sensitive parts of a video bitstream. This ensures security while maintaining compatibility with compliant video decoders. CSE operates by modifying only the entropy coding elements within codecs such as AVC (H.264) and HEVC (H.265).
- Reference Software: Reference implementations for both encoding and decoding are provided. These enable developers and implementers to verify their solutions against standardized CSE functionality.
- The encoder and decoder are based on modifications to existing ISO/IEC reference softwares (ISO/IEC 14496-5 for AVC and ISO/IEC 23008-5 for HEVC).
- The reference software package includes commands and usage instructions for both Windows and Linux environments.
- Test Vectors and Conformance: A suite of encrypted test files (test vectors) and their expected outputs are supplied as tools for validation. These files include both encrypted bitstreams and reconstructed video files (YUV format) for direct comparison and compliance verification.
- Integration with ISOBMFF: Files utilizing the ISO Base Media File Format (ISOBMFF) structure are included, containing encrypted bitstreams and necessary decryption metadata, in line with ISO/IEC 23001-7 specifications.
Applications
ISO/IEC 23000-21:2019/Amd 1:2021 offers practical value for a variety of stakeholders in the multimedia and information technology industries:
- Software Developers: Use the reference software to integrate CSE functionality into products and ensure encryption implementations conform to international standards.
- Platform Providers: Validate streaming platforms or multimedia applications to guarantee they can correctly handle content protected by CSE, ensuring both security and interoperability.
- Security Auditors: Employ the provided test vectors and tools to audit and certify multimedia applications for compliance with content protection benchmarks.
- Standardization Bodies: Leverage the conformance point definitions and test process framework for harmonized certification and testing across products and services handling MPEG-A visual identity media.
- Media Content Owners: Protect valuable video assets leveraging advanced, standard-conformant encryption that does not inhibit decoding compatibility for authorized users.
Related Standards
To implement this amendment effectively, familiarity with the following related standards is beneficial:
- ISO/IEC 23000 Series (MPEG-A): A suite of standards defining multimedia application formats.
- ISO/IEC 14496-5: Reference software for Advanced Video Coding (AVC), also known as H.264.
- ISO/IEC 23008-5: Reference software for High Efficiency Video Coding (HEVC), also known as H.265.
- ISO/IEC 23001-7: Provides details on ISOBMFF and its support for encrypted streams and relevant metadata.
By following ISO/IEC 23000-21:2019/Amd 1:2021, organizations can strengthen the conformance, reliability, and security of visual identity management applications in the fast-evolving digital media landscape.
Open preview (PDF)Information technology — Multimedia application format (MPEG-A) — Part 21: Visual identity management application format — Amendment 1: Conformance and reference software