ISO IEC 23001-10-2020 amd1-2021 PDF

Full title and description

ISO/IEC 23001-10:2020/Amd 1:2021 — Information technology — MPEG systems technologies — Part 10: Carriage of timed metadata metrics of media in ISO base media file format — Amendment 1: Support for content-guided transcoding and spatial relationship of immersive media. This amendment extends the Part 10 timed-metadata carriage framework to add metadata elements and semantics that support content-guided transcoding and describe spatial relationships needed for immersive media workflows when carried in ISO Base Media File Format (ISOBMFF) files.

Abstract

This amendment specifies additions to ISO/IEC 23001-10:2020 to provide metadata constructs and normative rules enabling: (1) content-guided transcoding hints and metrics (so encoders/transcoders can make quality/bitrate decisions based on timed metrics), and (2) descriptors of spatial relationships required for immersive and multiview media (positioning, orientation and region relationships) when timed metadata is carried in ISOBMFF. The amendment is intended to preserve backward compatibility with existing Part 10 metadata carriage while enabling new immersive-media and transcoding-aware workflows.

General information

• Status: Published
• Publication date: 20 September 2021
• Publisher: ISO/IEC (JTC 1/SC 29 — Coding of audio, picture, multimedia and hypermedia)
• ICS / categories: 35.040.40 (Coding of audio, video, multimedia and hypermedia information)
• Edition / version: Edition 2 (ISO/IEC 23001-10:2020) — Amendment 1 (2021)
• Number of pages: 6

Scope

This amendment applies to ISO/IEC 23001-10:2020 and adds normative material to enable timed metadata that carries metrics and guidance for content-aware transcoding, and metadata to express spatial relationships for immersive media. It defines additional metadata items, usage rules and mapping for carriage inside ISO Base Media File Format structures so that players, transcoders and authoring tools can interpret and use the new timed metadata consistently.

Key topics and requirements

• Introduction of metadata items and semantics for content-guided transcoding (timed metrics and hints to guide bitrate/quality decisions).
• Definitions and descriptors to express spatial relationships for immersive and multi-view media (position, orientation, spatial regions and their temporal evolution).
• Requirements for how new metadata is carried and mapped inside ISOBMFF box structures to maintain compatibility with existing Part 10 mechanisms.
• Conformance rules and normative guidance for implementers to ensure interoperable interpretation of the added metadata.
• Recommendations for interactions between timed metadata, other media tracks and adaptive streaming/use cases.

Typical use and users

Used by media system architects, encoder and transcoder vendors, streaming platform engineers, content authoring and post‑production tool developers, device and player implementers, and test laboratories. Typical use cases include adaptive streaming systems that use content-guided metrics to optimize transcoding decisions, and immersive-media workflows that require explicit spatial relationship metadata for correct rendering and processing.

Related standards

Directly related to ISO/IEC 23001-10:2020 (base document). Works alongside ISO Base Media File Format specifications (ISO/IEC 14496-12) and other MPEG systems and metadata parts in the ISO/IEC 23001 family. Implementers commonly refer to related MPEG and JTC 1/SC 29 outputs for codec, container and immersive-media interoperability.

Keywords

timed metadata, metadata metrics, ISOBMFF, ISO base media file format, content-guided transcoding, immersive media, spatial relationship, MPEG systems, carriage of metadata, transcoding hints, metadata carriage

FAQ

Q: What is this standard?

A: It is Amendment 1 (2021) to ISO/IEC 23001-10:2020, adding timed-metadata features to support content-guided transcoding and spatial relationship descriptors for immersive media when metadata is carried in ISO Base Media File Format files.

Q: What does it cover?

A: The amendment defines new metadata items, semantics and mapping rules for carrying timed metrics and spatial-relationship information in ISOBMFF so that transcoders, players and authoring tools can use that information for quality/bitrate decisions and correct immersive rendering.

Q: Who typically uses it?

A: Encoder/transcoder developers, streaming-platform engineers, content authors, player implementers, device manufacturers and test labs working with adaptive streaming, transcoding workflows and immersive-media applications.

Q: Is it current or superseded?

A: The amendment is a published extension to the 2020 edition of ISO/IEC 23001-10 and is current as an amendment; implementers should use it together with the base 2020 document. Standards in this area are periodically reviewed and may receive further amendments or revisions.

Q: Is it part of a series?

A: Yes — it is Part 10 of the ISO/IEC 23001 family (MPEG systems technologies) and is intended to be used alongside other MPEG and ISOBMFF specifications.

Q: What are the key keywords?

A: timed metadata, content-guided transcoding, spatial relationship, immersive media, ISOBMFF, metadata metrics, MPEG systems.