AES Standards News Blog

 

New project - Metadata integrity

New project AES-X224, Metadata integrity in audio files, has been initiated and assigned to working group SC-07-01.

The project will create a guide for manufacturers of audio hardware, software and computer platforms describing best practices for the management of metadata embedded in audio files.

With increasing use of embedded metadata, consisting of descriptive, technical, rights and more, a corresponding importance and reliance are being placed on it. It is important to recognize the current issues with metadata management within the ecosystem that makes up the audio industry and the way this can affect the reliable communication of metadata.

We look to the photo industry as a great example of metadata management throughout the program chain from originators to aggregators and users of content.

This document would not take a stance on any specific metadata standards or initiatives. Neither does it take a stance on the virtues of using embedded metadata or not. It will simply provide guidance on how to properly manage embedded metadata so that it performs reliably. 

http://www.aes.org/standards/meetings/new-projects.cfm


Posted: Monday, November 4, 2013

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New project - New audio data connector

New project AES-X222, New audio data connector, has been initiated and assigned to working group SC-05-02.

The project will specify basic dimensions and application details for two- and four-contact circular connectors including a circumferential shield, used for balanced interconnections of sound system components for professional audio, commercial, recording, broadcast and similar applications, carrying either analog or digital signals. 

The professional audio community has been searching for an alternative to the XLR type connector that nowadays is considered bulky. The alternative should exhibit the same robustness, reliability and handling capabilities at a smaller size. 

Miniature XLR-type connectors cannot provide the same degree of robustness as XLR-type connectors do, and other small-scale connectors as used in or derived from consumer and IT equipment (USB, for example) cannot meet the robustness requirements of professional applications. 

A new connector system is proposed that addresses the key issues indicated above. It consists of a continuous system (that is, two different types for each free and fixed connector). Each connector houses two signal contacts (an extension to 4 contacts is planned) in a housing which incorporates an internal circumferential shield. Like the XLR type the system has a positive locking mechanism. 

 

http://www.aes.org/standards/meetings/new-projects.cfm


Posted: Thursday, October 31, 2013

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AES67-2013, Networks, audio-over-IP interoperability

 AES67-2013, AES standard for audio applications of networks - High-performance streaming audio-over-IP interoperability, has been published.

This standard defines an interoperability mode for transport of high-performance audio over networks based on the Internet Protocol. For the purposes of the standard, high-performance audio refers to audio with full bandwidth and low noise. These requirements imply linear PCM coding with a sampling frequency of 44,1 kHz and higher and resolution of 16 bits and higher. High performance also implies a low-latency capability compatible with live sound applications. The standard considers latency performance of 10 milliseconds or less.  This standard provides comprehensive interoperability recommendations in the areas of synchronization, media clock identification, network transport, encoding and streaming, session description and connection management.

 

AES standards are available to AES members free of charge as a benefit of membership. Details of AES membership can be found at: http://www.aes.org/membership/

To obtain a copy of this standard, go to http://www.aes.org/publications/standards/ and search using "AES67", or go directly to:

http://www.aes.org/publications/standards/search.cfm?docID=96

 

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Posted: Wednesday, September 11, 2013

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New project - Audio ADC measurement and performance for archiving applications

New project AES-X217, Audio Analog-to-Digital Converter Test Method and Performance Specification for Archiving and Preservation Applications, has been initiated and assigned to working group SC-02-01

This project will specify sets of measurement methods and performance criteria to characterize the performance of audio analog-to-digital converters (ADCs) used in archiving and preservation workflows. This standard considers the production of files using the highest-quality ADC devices.

 

This standard would provide a test method and performance specification to be used by organizations digitizing analog sound recordings for preservation. The quality of the digitization is critically dependent on the quality of the analog-to-digital converter (ADC) that is used. 

It is generally understood that commonly-published performance metrics are of little value in selecting or specifying a suitable ADC. AES17 provides test methods for ADCs but no performance requirements. 

This project will produce a set of tightly integrated specifications that will provide relevant organizations with the ability to: 

b) measure and test ADCs for selection, acquisition and integration into preservation systems; 

a) include quality requirements in statements of work to vendors being hired to perform digitizing services; 

c) perform routine test and measurement of ADCs being used in digitizing workflows to confirm integrity. 

This project also aims to provide test and measurement solutions that are a) cost effective, and b) able to be used by technicians who are not measurement specialists.

 

http://www.aes.org/standards/meetings/new-projects.cfm


Posted: Wednesday, August 21, 2013

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Call for Comment on DRAFT AES67-xxxx - High-performance streaming audio-over-IP interoperability

 The Call for Comment on DRAFT of AES67-xxxx, "AES standard for audio applications of networks - High-performance streaming audio-over-IP interoperability" was published 2013-07-29. 

 

http://www.aes.org/standards/comments/cfc-draft-aes67-xxxx-130729.cfm

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Posted: Monday, July 29, 2013

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A Call for Comment on REAFFIRMATION of AES54-3-2008 - Shields of balanced microphone-level outputs

 A Call for Comment on REAFFIRMATION of AES54-3-2008, AES standard on interconnections - Grounding and EMC practices - Shields of balanced microphone-level outputs of active equipment other than microphones, was published on 2013-07-17

http://www.aes.org/standards/comments/cfc-aes54-3-2008-reaff-130717.cfm

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Posted: Wednesday, July 17, 2013

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A Call for Comment on REAFFIRMATION of AES54-2-2008 - Shields of balanced audio wiring within passive units

 A Call for Comment on REAFFIRMATION of AES54-2-2008AES standard on interconnections - Grounding and EMC practices - Shields of balanced audio wiring within fixed and portable passive connector panels, jack fields, and passive microphone splitters, was published on 2013-07-17

http://www.aes.org/standards/comments/cfc-aes54-2-2008-reaff-130717.cfm

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Posted: Wednesday, July 17, 2013

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Call for Comment on REAFFIRMATION of AES54-1-2008 - cable shields of portable balanced audio cables

 A Call for Comment on REAFFIRMATION of AES54-1-2008AES standard on interconnections - Grounding and EMC practices - Connection of cable shields within connectors attached to portable balanced audio cables, was published on 2013-07-17

http://www.aes.org/standards/comments/cfc-aes54-1-2008-reaff-130717.cfm 

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Posted: Wednesday, July 17, 2013

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Call for Comment on REAFFIRMATION of AES5-2008 - Preferred sampling frequencies for PCM

A Call for Comment on REAFFIRMATION of AES5-2008, AES recommended practice for professional digital audio - Preferred sampling frequencies for applications employing pulse-code modulation, was published on 2013-07-01.

http://www.aes.org/standards/comments/cfc-reaff-aes5-2008-130701.cfm

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Posted: Monday, July 1, 2013

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Call for Comment on REAFFIRMATION of AES58-2008 - Application of IEC 61883-6 32-bit generic data

A Call for Comment on REAFFIRMATION of AES58-2008 AES standard for digital audio - Audio applications of networks - Application of IEC 61883-6 32-bit generic data, was published on 2013-07-01.

http://www.aes.org/standards/comments/cfc-reaff-aes58-2008-130701.cfm

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Posted: Monday, July 1, 2013

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