Overview
ISO/IEC 23000-19:2024/Amd 1:2024 is an amendment to the international MPEG-A standard, specifically Part 19: Common Media Application Format (CMAF) for segmented media. Published by ISO and IEC, this amendment introduces support for Low Complexity Enhancement Video Coding (LCEVC) and related video codec technologies. The update ensures enhanced compatibility and performance in segment-based media streaming, supporting advanced coding techniques while maintaining interoperability with established media workflows.
Key Topics
- LCEVC Integration: Defines packaging and codec constraints for using LCEVC within CMAF media profiles, including dependent and enhancement track structures.
- CMAF Track Dependencies: Details how LCEVC tracks can depend on base CMAF tracks (e.g., AVC, HEVC, EVC, or VVC), requiring proper signaling and manifest structure for efficient adaptive streaming.
- Media Profile and Track Format: Introduces requirements for LCEVC media profiles, track formats, and the associated file brands, ensuring standardized implementation across platforms.
- Bitrate, Layer, and Parameter Controls: Sets out frame rate, bitrate, and layer constraints, along with parameter set referencing, to optimize video playback and compatibility.
- Codec Signaling and Metadata: Specifies usage of RFC 6381-compatible codecs parameters and extended metadata for correct codec identification and display rendering.
Applications
ISO/IEC 23000-19:2024/Amd 1:2024 is critical for industries and organizations involved in streaming media, online video delivery, and multimedia packaging. Key areas of application include:
- OTT and Video-on-Demand Platforms: Supports efficient streaming by enabling adaptive broadcasts using base and enhancement layers, improving end-user video experiences even on devices with limited decoding capabilities.
- Content Production and Post-Processing: Streamlines workflows where multiple codecs and container formats are present by ensuring that enhancements like LCEVC can be cleanly packaged within standard CMAF files.
- Broadcasting and Live Streaming: Facilitates low-latency and high-efficiency delivery, crucial in live sporting events, news, and large-scale broadcasts where segmentation and quick adaptation to network conditions are necessary.
- Device Interoperability: Enhances compatibility across smart TVs, set-top boxes, mobile devices, and web players by conforming to standardized media profiles and signaling methods.
- Scalable Video Coding: Provides a way to deliver both base (lower quality) and enhancement (higher quality) streams, optimizing bandwidth use and playback quality depending on user device and network conditions.
Related Standards
Adoption of ISO/IEC 23000-19:2024/Amd 1:2024 benefits from understanding its relationship with other widely used international standards:
- ISO/IEC 23094-2:2021 - General video coding: Specifies LCEVC technology and profiles.
- ISO/IEC 14496-15 - MP4 File Format: Outlines the storage of video in the ISO Base Media File Format, which is referenced for implementing CMAF and LCEVC.
- RFC 6381 - Codec Parameters: Used for identifying codecs in media streams and signaling proper profile and level information.
- MPEG-A Standards Series (ISO/IEC 23000-x) - Framework for the MPEG application formats, including the packaging and interoperability of audio, video, and multimedia content.
- CMAF (ISO/IEC 23000-19) - Standardizes segmented media delivery, foundational for adaptive streaming solutions.
Practical Value
By integrating LCEVC and other advanced video coding technologies into the CMAF standard, this amendment:
- Optimizes streaming workflows by adding support for layered video delivery (base and enhancement).
- Improves network and decoder efficiency, making high-quality video accessible even in constrained environments.
- Supports long-term interoperability and scalability in the media ecosystem.
- Facilitates innovation in both content delivery and playback device design, accommodating current and emerging video codec needs.
Implementing this amendment helps organizations stay current with technological advancements in video streaming, ensuring their platforms deliver high-quality, standards-based multimedia experiences to users worldwide.