MPEG-H 3D Audio
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 128 loudspeaker channels or 128 objects. 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.
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.[1] The allowed audio types would be audio channels, audio objects, and HOA.[1]
On September 10, 2014, Fraunhofer IIS demonstrated a real time MPEG-H 3D audio encoder.[2]
In February 2015 MPEG announced that MPEG-H 3D Audio would be published as an International Standard.[3]
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.[4]
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.[5]
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.[6]
Profiles
The Main profile of MPEG-H 3D Audio has 5 levels.[7]
| Level | Maximum number of core channels |
Maximum number of loudspeaker channels |
|---|---|---|
| 1 | 8 | 8 |
| 2 | 16 | 16 |
| 3 | 32 | 24 |
| 4 | 64 | 24 |
| 5 | 128 | 64 |
See also
- MPEG-H – A group of standards developed by the ISO/IEC MPEG
References
- ^ a b "Call for Proposals on 3D Audio". MPEG. Retrieved 2015-03-14.
- ^ "Fraunhofer IIS Demonstrates Real-Time MPEG-H Audio Encoder System for Broadcast Applications at IBC". Business Wire. 2014-09-10. Retrieved 2015-03-15.
- ^ "MPEG-H 3D Audio progresses to International Standard". MPEG. Retrieved 2015-03-14.
- ^ "Advanced Television Systems Committee Begins Review of ATSC 3.0 Audio System Proposals". Advanced Television Systems Committee. 2015-03-10. Retrieved 2015-03-14.
- ^ "Fraunhofer IIS, Qualcomm and Technicolor to Demonstrate the World's First Live Broadcast of MPEG-H Interactive and Immersive TV Audio". Business Wire. Retrieved 9 October 2015.
- ^ "Evaluation of Proposed ATSC 3.0 Audio Systems Begins". Advanced Television Systems Committee. Advanced Television Systems Committee. April 2015. Retrieved 9 October 2015.
- ^ a b "Text of ISO/IEC 23008-3/ DAM, 3D Audio Profiles". MPEG. Retrieved 2015-03-14.