science

MPEG-H 3D Audio

MPEG-H 3D Audio is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand MPEG-H 3D Audio rather than just read about it. In short: MPEG-H 3D Audio, specified as ISO/IEC 23008-3 (MPEG-H Part 3), is an audio coding standard developed by the ISO/IEC Moving Picture Experts Group (MPEG) to support coding audio as audio channels, audio objects, or higher order ambisonics (HOA). MPEG-H 3D Audio can support up to 64 loudspeaker channels and 128 codec core channels.

Key takeaways

MPEG-H 3D Audio belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect MPEG-H 3D Audio to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of MPEG-H 3D Audio from memory before moving on to harder problems.

Reference excerpt

MPEG-H 3D Audio, specified as ISO/IEC 23008-3 (MPEG-H Part 3), is an audio coding standard developed by the ISO/IEC Moving Picture Experts Group (MPEG) to support coding audio as audio channels, audio objects, or higher order ambisonics (HOA). MPEG-H 3D Audio can support up to 64 loudspeaker channels and 128 codec core channels. Objects may be used alone or in combination with channels or HOA components. The use of audio objects allows for interactivity or personalization of a program by adjusting the gain or position of the objects during rendering in the MPEG-H decoder. Audio is encoded using an improved modified discrete cosine transform (MDCT) algorithm. Channels, objects, and HOA components may be used to transmit immersive sound as well as mono, stereo, or surround sound. The MPEG-H 3D Audio decoder renders the bitstream to a number of standard speaker configurations as well as to misplaced speakers. Binaural rendering of sound for headphone listening is also supported. These are the ISO standards relating to MPEG-H 3D Audio: ISO/IEC 23008-3:2026 - Part 3: 3D audio ISO/IEC 23008-6:2025 - Part 6: 3D audio reference software ISO/IEC 23008-9:2023 - Part 9: 3D Audio conformance testing

History In January 2013, the requirements were released for MPEG-H 3D Audio which was for an increase in the immersion of audio and to allow for a greater number of loudspeakers for audio localization. The allowed audio types would be audio channels, audio objects, and HOA. On September 10, 2014, Fraunhofer IIS demonstrated a real time MPEG-H 3D audio encoder. In February 2015, MPEG announced that MPEG-H 3D Audio would be published as an International Standard. On March 10, 2015, the Advanced Television Systems Committee announced that MPEG-H 3D Audio was one of the three standards proposed for the audio system of ATSC 3.0. On April 10, 2015, Fraunhofer, Technicolor, and Qualcomm demonstrated a live broadcast signal chain consisting of all the elements needed to implement MPEG-H based audio in broadcast television. The demonstration featured a simulated remote truck at a sports event, a network control center, a local affiliate station, and a consumer living room. The audio was produced and encoded through an MPEG-H audio monitoring and authoring unit, mpeg-h real-time broadcast encoders, and real-time professional and consumer MPEG-H decoders. The audio was decoded in the consumer living room on a Technicolor set-top box. In April 2015, the Advanced Television Systems Committee announced that systems from Dolby Laboratories and the MPEG-H Audio Alliance (Fraunhofer, Technicolor, and Qualcomm) would be tested in the coming months for use as the audio layer for the ATSC 3.0 signal. In August 2015, the Advanced Television Systems Committee announced that systems from Dolby Laboratories and the MPEG-H Audio Alliance were demonstrated to the ATSC showing how they would work in both professional broadcast facilities and consumer home environments. On April 18, 2016, South Korean broadcast equipment manufacturers Kai Media and DS Broadcast announced the availability of MPEG-H 3D Audio in their latest 4K broadcast encoders. On May 2, 2016, the Advanced Television Systems Committee has elevated the A/342 audio standard for ATSC 3.0 to the status of a Candidate Standard. The MPEG-H Audio Alliance TV audio system and Dolby AC-4 are part of the A/342 standard. On June 24, 2016, the South Korean standardization organization "Telecommunications Technology Association" TTA published the standard for "Transmission and Reception of Terrestrial UHD TV Broadcasting Service" for the South Korean terrestrial UHD TV broadcasting service to be launched in February 2017. The TTA standard is based on ATSC 3.0 and specifies MPEG-H 3D Audio as the sole audio codec for the 4K TV system. On January 3, 2017, Fraunhofer IIS announced a trademark program to identify interoperable products that include MPEG-H. On January 8, 2019, Sony announced an immersive music service "360 Reality Audio" that uses MPEG-H.

Profiles The Main profile of MPEG-H 3D Audio has five levels.

MPEG announced the availability of the MPEG-H 3D Audio Amendment 3 for late 2016. This amendment defines the Low Complexity Profile which includes technology that increases coding efficiency and also adds features designed for use in the broadcast industry.

See also MPEG-H – A group of standards developed by the ISO/IEC MPEG Dolby AC-4

References

External links MPEG website MPEG-H Audio Alliance Fraunhofer TV Audio System Audioexpress.com - Fraunhofer IIS shows immersive sound future with MPEG-H at CES2017 MPEG-H TV Audio System Trademark Program

Worked examples

Example 1 — a first encounter with MPEG-H 3D Audio

Start with the simplest possible case. Write down what MPEG-H 3D Audio claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to MPEG-H 3D Audio before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about MPEG-H 3D Audio ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of MPEG-H 3D Audio

In research: MPEG-H 3D Audio appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses MPEG-H 3D Audio in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: MPEG-H 3D Audio is common in secondary-school and first-year university syllabi. It links to neighbouring topics IEC standards, ISO standards, MPEG-H, so understanding it makes those chapters shorter.
In everyday life: Look for MPEG-H 3D Audio outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study MPEG-H 3D Audio in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what MPEG-H 3D Audio means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain MPEG-H 3D Audio out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is MPEG-H 3D Audio in simple terms?

Why does MPEG-H 3D Audio matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study MPEG-H 3D Audio?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on MPEG-H 3D Audio.