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BS ISO IEC 23008 — Information Technology — High Efficiency Coding and Media Delivery in Heterogeneous Environments (MPEG-H) Series
Information Technology — High Efficiency Coding and Media Delivery in Heterogeneous Environments (MPEG-H) (2015 edition family)
📺 BS ISO/IEC 23008 is the British Standard family published by BSI adopting the ISO/IEC 23008 series on high efficiency coding and media delivery in heterogeneous environments (the MPEG-H standard system). This batch collects six documents, developed with participation from BSI Technical Committee IST/37 (Coding of picture, audio, multimedia and hypermedia information). MPEG-H is the next-generation MPEG standard family for 4K/8K ultra-high-definition, immersive audio and multi-screen/multi-network media distribution: Part 2 is High Efficiency Video Coding (HEVC/H.265), Part 3 is 3D audio coding, Part 5 is MPEG Media Transport (MMT), and Parts 8, 10 and 11 concern MMT composition information, forward error correction (FEC) codes and related tools. The series covers the complete technical chain of “ultra-HD video coding — immersive audio — heterogeneous-network media delivery”.
💡 Some parts of this series are archived as scanned images; the related technical content in this article is compiled from public-domain knowledge. Always verify against the current BSI edition before citing.
1. Series Overview and Positioning 📌
As 4K/8K displays, multi-channel/object audio and multi-screen distribution become mainstream, the traditional MPEG-2 transport stream and file-based encapsulation can no longer simultaneously satisfy high bandwidth, low latency and heterogeneous-network adaptation. The MPEG-H system was created in response: on the one hand HEVC provides roughly 50% coding-efficiency improvement over AVC; on the other hand MMT provides an IP-oriented media transport scheme supporting layering, fragmentation and flexible error correction; and 3D audio provides immersive, object-based audio experiences. The BS ISO/IEC 23008 series is a foundational standard family for ultra-HD broadcasting, OTT streaming, virtual reality and professional production.
⚠️ The parts of this series evolve rapidly (both HEVC and MMT have multiple revisions), and the syntax and extensions across versions (such as HEVC range extensions and MMT error-correction/synchronisation) are not fully compatible. Implementations and deployments must lock the specific version and check the revision history.
2. Series Structure and Technical Content 📚
The six documents of the BS ISO/IEC 23008 series in this batch (2015 editions) form the key part of the MPEG-H system:
| Part | Subject | Main Content | Year |
|---|---|---|---|
| BS ISO IEC 23008-2 | High Efficiency Video Coding (HEVC/H.265) | Ultra-HD video compression, coding tree/prediction/transform and profile/level/tier | 2015 |
| BS ISO IEC 23008-3 | 3D audio coding | Multi-channel/object audio coding, spatial information and rendering framework | 2015 |
| BS ISO IEC 23008-5 | MPEG Media Transport (MMT) | IP-oriented media packaging, layered transport and synchronisation | 2015 |
| BS ISO IEC 23008-8 | MMT related tools (scanned) | Auxiliary specifications for MMT composition/transport (from public-domain knowledge) | 2015 |
| BS ISO IEC 23008-10 | MMT Forward Error Correction (FEC) codes | FEC coding schemes and parameters (from public-domain knowledge) | 2015 |
| BS ISO IEC 23008-11 | MMT Composition Information | MMT composition information (CI) and package structure description (from public-domain knowledge) | 2015 |
The internal logic of the series: Part 2 solves “how to compress ultra-HD video efficiently”, Part 3 solves “how to code immersive audio”, Part 5 solves “how to transport and synchronise media across different networks”, and Parts 8, 10 and 11 provide auxiliary tools, FEC and composition information for MMT respectively. Together they support the end-to-end chain of “coding — packaging — transport — presentation”.
✅ Parts 2, 3 and 5 of the series are available as full readable text; Parts 8, 10 and 11 are scanned versions and are summarized here on the basis of general knowledge in the field.
3. Key Technical Requirements 🔬
3.1 High Efficiency Video Coding (HEVC/H.265, Part 2)
Part 2 specifies the HEVC coding syntax and decoding process: coding tree units (CTUs) with quadtree recursive partitioning replace H.264 macroblocks, larger prediction and transform blocks are supported, and tools such as 33 angular intra predictions, advanced motion vector prediction (AMVP) with merge mode, deblocking filter and sample adaptive offset (SAO) are added. The specification defines profiles (Main, Main10, Range Extensions, etc.), levels and tiers (Main/High) that constrain resolution, bitrate and processing capability, covering 4K/8K and HDR applications. The specification is the same text as ITU-T H.265.
3.2 3D audio coding (Part 3)
Part 3 specifies immersive 3D audio coding: it supports both channel-based audio (such as 5.1, 7.1 and 22.2) and object-based audio, and provides adaptive rendering from audio objects to loudspeaker arrays. The specification defines audio frames, spatial information, object grouping and rendering metadata, so listeners obtain a consistent immersive sound field across speaker layouts, widely used in cinema, VR and home theatre.
3.3 MPEG Media Transport (MMT, Part 5)
Part 5 defines an IP-oriented media transport scheme: it uses packet-based transport, packaging media data (video, audio, subtitles) into MMT units carrying timestamps and synchronisation information; supports layered transport (prioritised by importance) and flexible forward error correction (with Part 10); and uses composition information (with Part 11) to describe the presentation timeline and content relationships. MMT targets converged broadcast-broadband distribution with low latency and robust transport.
⚠️ MMT and DASH/HLS are complementary rather than substitutes: MMT suits low-latency, synchronised transport for broadcast/converged networks; DASH/HLS suit HTTP-based on-demand/adaptive streaming. Choose by distribution scenario, latency requirements and existing infrastructure.
4. Engineering Practice 🛠️
- 🔍 Ultra-HD content production and distribution: encode 4K/8K per Part 2 and generate immersive audio per Part 3 to enhance the viewing experience.
- 🔧 Broadcast and converged-network transport: use MMT (Parts 5/10/11) for converged broadcast-broadband distribution supporting mobile reception and low latency.
- 📊 Device compatibility validation: build a decoder compatibility matrix by profile/level/tier and MMT version to avoid high-end content failing to play.
- 📋 Coding-efficiency and bitrate management: optimise bitrate allocation and partitioning parameters under HEVC, balancing subjective quality and transport cost.
5. Frequently Asked Questions ❓
❓ Q: How much more efficient is HEVC than AVC?
A: At the same subjective quality, HEVC typically saves about 50% of the bitrate compared with AVC, but coding complexity rises significantly and the patent-licensing environment is more complex.
A: At the same subjective quality, HEVC typically saves about 50% of the bitrate compared with AVC, but coding complexity rises significantly and the patent-licensing environment is more complex.
❓ Q: How does MMT differ from the traditional MPEG-2 transport stream?
A: MMT targets IP/hybrid networks and supports layering, objectisation and flexible error correction with lower latency; MPEG-2 TS is fixed-packet multiplexing for broadcasting and remains widely used in digital TV.
A: MMT targets IP/hybrid networks and supports layering, objectisation and flexible error correction with lower latency; MPEG-2 TS is fixed-packet multiplexing for broadcasting and remains widely used in digital TV.
🔍 Q: Why are Parts 8/10/11 marked as “scanned”?
A: In this batch of archive material, those parts exist as scanned images; the technical content is summarized from public-domain knowledge. Verify against the current BSI edition before formal citation.
A: In this batch of archive material, those parts exist as scanned images; the technical content is summarized from public-domain knowledge. Verify against the current BSI edition before formal citation.
❓ Q: What is the difference between 3D audio and surround sound?
A: Surround sound is a fixed-channel planar layout; 3D audio supports more channels and independent audio objects, and rendering adapts the sound field to the speaker layout, providing better height cues and immersion.
A: Surround sound is a fixed-channel planar layout; 3D audio supports more channels and independent audio objects, and rendering adapts the sound field to the speaker layout, providing better height cues and immersion.