Overview
ISO/IEC 23000-9:2008/Amd 1:2010 is an amendment to Part 9 of the MPEG-A series that extends the Digital Multimedia Broadcasting application format (DMB-AF) with formal conformance requirements and associated reference software. The amendment defines a conformance suite (file, player and creator conformance), supplies conformance files, and describes how DMB services and associated data are to be stored and annotated inside DMB-AF files.
Key Topics and Technical Requirements
- Conformance model
- Three conformance aspects: file conformance, player conformance, and creator conformance.
- Conformance files and reference software are provided to exercise and validate major DMB-AF features.
- File conformance criteria
- Brand consistency: ‘ftyp’ box major_brand must match declared brand.
- File format conformance: box structure and syntax must follow the DMB-AF box tables.
- Component consistency and conformance: components must match brand entries and conform to listed specifications and restrictions.
- DAB / DAB+ storage
- Storage rules for DAB audio frames and DAB+ audio super frames, including PAD (F-PAD/X-PAD) usage for DLS and SLS services.
- Sample and random-access definitions (stss box behavior) and a sample description (DABSampleEntry) with fields such as pad_type and audio_super_frame_size.
- T-DMB / S-DMB TS storage
- MPEG-4 SL over MPEG-2 TS structure; assumption that Reed–Solomon parity decoding occurs before storage and that 188-byte TS packets are stored.
- MPEG‑4 media storage
- Supported media: ER-BSAC, HE‑AAC2, AVC (Baseline Profile Level 1.3), AAC+SBR, BIFS (Core2D Level 1) and image formats (JPEG/PNG/MNG).
- Allowed storage types: MPEG-2 TS encapsulated, Separate ES without MPEG‑4 Systems, Separate ES with MPEG‑4 Systems context (IOD/OD/BIFS).
- Track/sample entry mapping (e.g., ‘mp4a’, ‘avc1’, ‘mp4s’, ‘mp4v’).
- Other content
- Image storage as items or timed tracks, with CRID and TVA registration.
- 3GPP timed text stored as ‘tx3g’ (3GPP TS 26.245).
- NPAD (non-program associated data) storage for BWS packages and Java MIDlets (iinf, crid and item-location usage).
- Metadata
- MPEG‑21 DID used as root container; TV‑Anytime (TVA), MPEG‑21 IPMP and REL integration and annotation rules; recommendation to validate metadata against schemas.
Applications and Who Uses It
- Broadcasters, system integrators and content packagers implementing Digital Multimedia Broadcasting (DMB) services (DAB/DAB+/T‑DMB/S‑DMB).
- Device and player manufacturers implementing DMB-AF playback to ensure interoperability.
- Test labs and standards implementers using the conformance files and reference software to verify file, player and creator compliance.
- Middleware and metadata tool vendors working with MPEG‑21, TV‑Anytime, or NPAD packaging for broadcast/mobile delivery.
Related Standards (if applicable)
- ISO/IEC 14496 (MPEG‑4 Systems, MP4 file format, sample entries)
- ETSI EN 300 401 (DAB), ETSI TS 102 563 (DAB+), ETSI TS 102 428 (T‑DMB profiles)
- 3GPP TS 26.245 (Timed Text)
- MPEG‑2 Transport Stream (TS), MPEG‑21 (DID/IPMP/REL)
Keywords: ISO/IEC 23000-9:2008/Amd 1:2010, DMB-AF, Digital Multimedia Broadcasting, conformance, reference software, DAB, DAB+, T‑DMB, MPEG‑4, metadata, TV‑Anytime.