Overview
ISO/IEC 23001-19:2026 - Information technology - MPEG systems technologies - Part 19: Carriage of green metadata defines standardized methods for storing and delivering metadata that supports energy-efficient consumption of digital media. Commonly referred to as "green metadata," this standard enables the description, packaging, and signaling of technical data used to optimize media processes for reduced power consumption during decoding, display, and streaming.
The standard establishes how timed green metadata, such as power consumption metrics, can be associated with media tracks using the ISO Base Media File Format (ISOBMFF; ISO/IEC 14496-12). In streaming contexts, particularly Dynamic Adaptive Streaming over HTTP (DASH), ISO/IEC 23001-19:2026 details how to signal and align green metadata representations with corresponding media content. By providing a common framework for energy efficiency in media handling, the standard advances sustainability across the content distribution chain.
Key Topics
- Green Metadata Definition: Focuses on timed metadata as defined in ISO/IEC 23001-11, providing contextual data that helps reduce energy consumption during encoding, decoding, and presentation of media.
- Power Consumption Metrics: Enables carriage of information regarding decoder complexity, display power usage, and related quality metrics to inform optimization strategies.
- File Format Integration: Specifies how green metadata is stored within ISOBMFF files, using standardized sample entry types and track references to link metadata to media.
- DASH Integration: Defines signaling and encapsulation methods for green metadata within DASH streaming systems, ensuring dynamic and adaptive power optimization during content delivery.
- Display Attenuation Maps and Fine Control: Supports pixel-level or frame-level metadata for direct application in display power management, using mechanisms like display attenuation maps.
Applications
ISO/IEC 23001-19:2026 has a diverse range of applications across the digital media ecosystem, providing practical value for:
- Sustainable Video Streaming: Service providers and OTT platforms can use green metadata to optimize content delivery for energy efficiency during adaptive streaming over HTTP, contributing to lower energy consumption at both client and server ends.
- Consumer Electronics: Device manufacturers can implement green metadata parsing in video decoders and display drivers, allowing dynamic adjustment of power usage depending on content characteristics and playback context.
- Media Encoding and Production: Studios and media processors can generate and embed green metadata during content preprocessing and encoding stages, providing downstream ecosystems with actionable data for energy optimization.
- Player and Middleware Development: Software developers building video players, middleware, or system-on-chip solutions can leverage standardized structures to interpret green metadata and realize real-time power savings.
- Quality of Experience (QoE) Management: By incorporating metrics such as quality reduction and objective measures (e.g., PSNR, SSIM), platforms can balance viewing quality with energy efficiency, aligning with user preferences or device battery constraints.
Related Standards
Green metadata carriage under ISO/IEC 23001-19:2026 relies on integration with several related standards, enhancing interoperability and sustainability in multimedia systems:
- ISO/IEC 23001-11:2023 - Defines the conceptual framework for green metadata and energy-efficient media consumption.
- ISO/IEC 14496-12 - Specifies the ISO Base Media File Format, the underlying container for storing both media and associated metadata tracks.
- ISO/IEC 23009-1:2022 and 23009-3 - Provide standards for dynamic adaptive streaming (DASH), including signaling and media presentation description (MPD) formats.
- ISO/IEC 23001-10:2020 - Details carriage of timed metadata metrics in media files, complementing green metadata.
- ISO/IEC 14496-15 - Covers carriage of video NAL unit structured content, crucial for packaging certain types of green metadata samples.
By following ISO/IEC 23001-19:2026 and its related standards, media industry stakeholders can achieve greater interoperability, energy efficiency, and sustainability across a wide variety of multimedia distribution and consumption platforms.
Keywords: ISO/IEC 23001-19, green metadata, energy-efficient media, MPEG systems, ISOBMFF, DASH streaming, power consumption optimization, display attenuation map, media sustainability
Open preview (PDF)Information technology — MPEG systems technologies — Part 19: Carriage of green metadata
