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Call for Comment on DRAFT REVISED AES70-3-xxxx - Open Control Architecture - Part 3: Protocol for TCP/IP Networks

The Call for Comment on DRAFT AES70-3-xxxx, "AES standard for audio applications of networks - Open Control Architecture - Part 3: Protocol for TCP/IP Networks" was published 2018-09-28.  

http://www.aes.org/standards/comments/cfc-draft-aes70-3-xxxx-180928.cfm
 
AES70 defines a scalable control-protocol architecture for professional media networks. AES70 addresses device control and monitoring only; it does not define standards for streaming media transport. 
 
AES70 is divided into a number of separate parts. This Part 3 specifies a protocol implementation for TCP/IP networks. It should be read in conjunction with Part 1, Framework, and Part 2, Class Tree. 
 

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Posted: Friday, September 28, 2018

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Call for Comment on DRAFT REVISED AES70-2-xxxx - Open Control Architecture - Part 2: Class structure

The Call for Comment on DRAFT REVISED AES70-2-xxxx, "AES standard for audio applications of networks - Open Control Architecture - Part 2: Class structure" was published 20185-09-28.  

http://www.aes.org/standards/comments/cfc-draft-aes70-2-xxxx-180928.cfm  
 
AES70 defines a scalable control-protocol architecture for professional media networks. AES70 addresses device control and monitoring only; it does not define standards for streaming media transport. 
 
AES70 is divided into a number of separate parts. This Part 2 specifies the control class structure that defines the control and monitoring functional capabilities of the standard and should be read in conjunction with Part 1, Framework..

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Posted: Friday, September 28, 2018

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Call for Comment on DRAFT REVISED AES70-1-xxxx - Open Control Architecture - Part 1: Framework

The Call for Comment on DRAFT REVISED AES70-1-xxxx, "AES standard for audio applications of networks - Open Control Architecture - Part 1: Framework" was published 2018-09-28.  

http://www.aes.org/standards/comments/cfc-draft-aes70-1-xxxx-180928.cfm
 
AES70 defines a scalable control-protocol architecture for the control and monitoring of professional media networks. AES70 addresses device control and monitoring only; it does not define standards for transporting streaming media or for describing media content. 
 
This Part 1 describes the models and mechanisms of the AES70 Open Control Architecture. These models and mechanisms together form the AES70 Framework. This document should be read in conjunction with Part 2, Class Structure and Part 3, TCP/IP communications protocol. 

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Posted: Friday, September 28, 2018

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Call for Comment on DRAFT REVISED AES5-xxxx - AES recommended practice for professional digital audio — Preferred sampling frequencies for applications employing pulse-code modulation

The Call for Comment on DRAFT REVISED AES5-xxxx - "AES recommended practice for professional digital audio — Preferred sampling frequencies for applications employing pulse-code modulation" was published 2018-09-19.

This standard covers the use of certain preferred sampling frequencies in applications employing pulse-code modulation where there is a need for interchange of high-fidelity digital audio programs with a minimum of transcoding complexity. Examples of applications where such interchange may occur include, but are not limited to, master tape recordings (audio alone, and audio with video), submaster tape recordings prepared for transfer to a consumer product format, studio signal processing, and the point-to-point transmission of broadcast signals over satellite or terrestrial networks.

This standard is not concerned with sampling frequencies for narrow-band audio applications, such as voice-quality transmission links, or with processing devices in which both the input and the output signals are in an analog format, even if such signals are ultimately used for interchange of program.

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Posted: Tuesday, September 18, 2018

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AES71-2018: Recommended Practice Loudness Guidelines for Over the Top Television and Online Video Distribution Published

This AES Recommended Practice (RP) describes the many issues related to online audio Loudness variations.  It provides comprehensive recommendations documenting effective guidelines for managing audio Loudness of soundtracks of television and video content available to consumers by Over-The-Top (OTT) and by Online Video Distributors (OVD).

When followed, these guidelines will provide consistent Loudness, appropriate playback loudness range, reduce audio quality degradation from excessive limiting, preserve the original artistic intent, and improve the listening experience. This document does not provide specific recommendations about target playback loudness or dynamic range.

The standard is available for sale now on in the AES Standards Store.

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Posted: Wednesday, August 1, 2018

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Call for Comment on Withdrawl of AES64-2012: AES standard for audio applications of networks - Command, control, and connection management for integrated media

Call for Comment on WITHDRAWAL of AES64-2012, AES standard for audio applications of networks - Command, control, and connection management for integrated media has been published in accordance with our 5-year review policy on 2018-06-22.

The reason for withdrawal is that the standard has become out of date and the original proponents do not think the effort required to update it is worthwhile.

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Posted: Friday, June 22, 2018

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Calls for Comment on Reaffirmation of AES-1id, AES2, AES59, AES63, AES65, AES66

Calls for comment on reaffirmation of the following AES standards have been published on 2018-06-22:

AES-1id-2012: AES Information Document for Acoustics - Plane-Wave Tubes - Design and Practice

AES2-2012: AES standard for acoustics - Methods of measuring and specifying the performance of loudspeakers for professional applications - Drive units

AES59-2012: AES standard for professional audio - Audio application of 25-way D-type connectors in balanced circuits

AES63-2012: AES standard for interconnections - Data connector in an XLR connector shell

AES65-2012: AES standard for interconnections - Connector for surround microphones

AES66-2012: AES standard for professional audio equipment - Application of connectors - Miniature XLR-type polarity and gender

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Posted: Friday, June 22, 2018

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Call for Comment on DRAFT REVISED AES53-xxxx - AES standard for digital audio - Digital input-output interfacing - Sample-accurate timing in AES47

The Call for Comment on DRAFT REVISED AES53-xxxx - "AES standard for digital audio - Digital input-output interfacing - Sample-accurate timing in AES47" was published 2018-06-22.

This document specifies how the timing markers specified in AES47 may be used to associate an absolute timestamp with individual audio samples. AES47 specifies a format for the transmission of digital audio over asynchronous transfer mode (ATM) networks. A recommendation is made to refer these timestamps to the SMPTE epoch which in turn provides a reference to UTC and GPS time.

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Posted: Friday, June 22, 2018

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AES67-2018: AES standard for audio applications of networks - High-performance streaming audio-over-IP interoperability Published

The AES67 Standard for audio applications of networks - High-performance streaming audio-over-IP interoperability has become the cornerstone of IP based audio applications.   It has received wide acceptance among manufacturers and users of networked audio equipment in professional applications.

This revision contains clarifications and minor corrections and adds a Protocol Implementation Conformance Statement (PICS) as an Annex. A new sender keep-alive recommendation, has been added to clause 6.3. Minor clarifications and corrections include a specification of MTU requirements in the presence of allowed (but not recommended) additional information in the RTP header and correcting SDP examples in clause 8.5 to match an erratum issued by the IETF on RFC 7273. Also, the domainNumber range was corrected to conform to IEEE 1588-2008 requirements.

The Protocol Implementation Conformance Statement (PICS) Annex is a valuable tool to insure proper compliance of AES67 implementations.   An implementation of AES67 that is claimed to conform to the standard must complete a PICS proforma as described in Annex G:

A completed PICS proforma is the PICS for the implementation in question. The PICS is a statement of which capabilities and options of the protocol have been implemented. The PICS can be used for a variety of purposes by various parties, including the following:

a) As a checklist by the protocol implementer, to reduce the risk of failure to conform to the standard through oversight;

b) As a detailed indication of the capabilities of the implementation, stated relative to the common basis for understanding provided by the standard PICS proforma, by the supplier and acquirer, or potential acquirer, of the implementation;

c) As a basis for initially checking the possibility of interworking with another implementation by the user, or potential user, of the implementation (note that, while interworking can never be guaranteed, failure to interwork can often be predicted from incompatible PICS).


Posted: Tuesday, April 24, 2018

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The AES67 standard for audio applications of networks gets a logo

The AES67 standard for audio applications of networks gets a logo

The AES67 Standard for audio applications of networks - High-performance streaming audio-over-IP interoperability has become the cornerstone of IP based audio applications. It has received wide acceptance among manufacturers and users of networked audio equipment in professional applications. Many users of the standard have requested a logo for use on their products and literature which will quickly and unambiguously identify products that conform to the specification.

The 2018 version of AES67, to be published next month, includes an annex with protocol implementation criteria. Answering the questions in the annex results in a Protocol Implementation Conformance Statement which is a detailed indication of the capabilities of the implementation, stated relative to the common basis for understanding provided by the standard PICS proforma, by the supplier and acquirer, or potential acquirer, of the implementation.

Use of the logo will be on a self-certification basis. Manufacturers must verify that their product conforms to the requirements of the standard before affixing the logo to their product, its literature or their advertising. Further details of the logo and its license terms will be forthcoming.


Posted: Wednesday, April 18, 2018

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