Approaching an Immersive Audio Standard 

By Michael Goldman  

 

While precise technical and timeline details about a single, internationally accepted standard for an interoperable, immersive audio format for digital cinema remain to be settled, one important aspect of this quest has crystallized in the past year or so, according to Peter Ludé, chair of the SMPTE Working Group on Immersive Sound (operating under the auspices of the SMPTE TC-25CSS Audio Technology Committee on Cinema Sound Systems). Ludé says the big breakthrough in the past year has not been technical in nature. Rather, it has been the fact that virtually everyone with a stake in the conversation has gotten publicly and enthusiastically on board with the industry's need for a single specification for the packaging, distribution, and theatrical playback of D-Cinema-based audio tracks that pushes past what was initially described in the original DCI (Digital Cinema Initiative) specification. Further, he suggests that key players across the industry now clearly understand that such a specification must build into its foundation the growing trend toward object-based audio playback methodologies, meaning audio tracks that include signals that carry their own metadata specifying a dynamic location for the sound to be played, along with other characteristics. This is in contrast to relying solely on the traditional, channel-based methodology of describing sound scenes using a set of audio signals that are intended for playback through specific loudspeaker configurations.

 

Ludé says that content creators in the form of Hollywood studios via the Digital Cinema Initiatives Consortium, and exhibitors, through their trade group, theNational Association of Theater Owners (NATO), have now formally called for such a standard, in addition to the individual support the working group is getting from various manufacturers and different types of anecdotal data the industry has been producing on the benefits of immersive sound in the creative process.

Views: 227

Replies to This Discussion

Interesting!

If said metadata is in the file (header/footer?), I guess all the world will need utilities to write that, and the world will need upgraded software that recognizes same, reads it and does something with it, rather than crashing!

>> Mark

The metadata could be in the stream, repeated periodically.

An analogy would be HDMI, two times per frame a vendor specific info packet is sent out indicating the video is stereographic and what S3D format it is.

What is Dolby's position on this? Clearly they most likely want a proprietary edge.

To belong to the DCI, they DCI, are pushing a format they control. Which is understandable, like CD-ROM, DVD, HDMI.

In the Vienna Symphonic library, they have done extensive empirical testing and simulation of acoustics in conventional rectangular rooms. To my knowledge no one has done similar analysis in domes. To get the done metadata correct, it is advisable to have similar analysis. Dome acoustics clearly are different.

RSS

Fulldome Wikipedia Entry

Fulldome Video Discussion Group

Fulldome Database

Discussion Forum

Emerging Standards Effort in Immersive Audio (re-post) 2 Replies

Started by Ed Lantz. Last reply by Matthew Dougherty Aug 8, 2014.

GSCA-IMERSA Pre-Summit Workshop March 5th 2 Replies

Started by Dan. Last reply by Dan Jan 18, 2014.

Emerging Film Industry Standards to Watch: IMF, ACES and MXF 2 Replies

Started by Ed Lantz. Last reply by Ed Lantz Feb 14, 2013.

Dome Master Show File Format 1.0 - Sec.III - Audio Files 1 Reply

Started by IMERSA.org. Last reply by Ken Scott Jul 26, 2012.

IPS 2012 IMERSA Fulldome Standards Workshop

Started by IMERSA.org Jul 26, 2012.

Dome Master Show File Format 1.0 - Sec.VI - Digital Rights Management: Encryption, etc. 10 Replies

Started by IMERSA.org. Last reply by Ryan Wyatt Jul 16, 2012.

Dome Master Show File Format 1.0 - Sec. I - Metadata 6 Replies

Started by IMERSA.org. Last reply by IMERSA.org Jul 16, 2012.

Dome Master Show File Format 1.0 - Sec.II - Dome Master Working Specification 22 Replies

Started by IMERSA.org. Last reply by Jérémie Gerhardt Apr 26, 2012.

Dome Master Show File Format 1.0 - Sec.V - Program Distribution Medium 6 Replies

Started by IMERSA.org. Last reply by Jonathan Strawn Feb 6, 2012.

Latest Activity

Claudio Recabarren Madrid posted a status
"october 2109 in USA contact to booking Recently in USA Roper Mountain Greenville SC Schiele Museum Charlotte, NC, MC College Washington DC"
Thursday
Antonio Pedrosa posted a discussion

Immersive Film Festival - IFF’19

Immersive Film Festival - IFF’19October 17 to 20, 2019Announcement IIThe Espinho Planetarium would like to invite you to the Immersive Film Festival, that will be held in Espinho, Portugal from October 17 to 20, 2019.This festival is an event that will gather international productions, both 2D and 3D, in the Immersive Cinema field. It is an open invitation to this community, from producers, to students and planetarium professionals.To attend is rather easy. Espinho is located close to the…See More
Wednesday
Mark C. Petersen posted a blog post

From Loch Ness Productions: Three new Geodesium albums released!

As we have been doing for the past 42 years, Loch Ness Productions is releasing the latest Geodesium albums of planetarium space music to the world. This time around, there are three: "Stellar Collections 2", "Infinite Light", and "Startalk".A long-time master of the medium, Mark C. Petersen has brought together these thematic collections from soundtracks that have delighted planetarium-going audiences around the world.…See More
Monday
Mark C. Petersen posted a blog post

Neurodome now available from Loch Ness Productions

Where in the mind does the spark of curiosity begin?Journey from the outer limits of the universe down to Earth and into the brain to explore the "inner" frontier of human knowledge! In this fulldome show, produced through a collaboration of scientists, doctors, animators, and planetarium specialists, real brain images come alive as neuroimaging technology becomes your…See More
Jul 6

© 2019   Created by Dan.   Powered by

Badges  |  Report an Issue  |  Terms of Service