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AES Amsterdam 2008
Paper Session P2

P2 - Audio Networking

Saturday, May 17, 09:30 — 12:00
Chair: Sascha Spors, Technische Universität Berlin - Berlin, Germany

P2-1 EBU Tech.doc. 3326 for Interoperability between Audio over IP Units Lars Jonsson, Swedish Radio - Stockholm, Sweden; Mathias Coinchon, European Broadcasting Union - Geneva, Switzerland
Audio over IP end units are now common in radio and TV operations for streaming programs over IP networks. The units are used to create contribution circuits from remote sites or local offices into main studio centers. The IP networks used are usually well managed corporate networks with good Quality of Service (QoS) and usually high bandwidth. Due to its availability, the Internet is also increasingly used for various cases of radio and television contribution, especially over longer distances. However, the use of high bit rates and reliable contribution transmissions over the Internet cannot be guaranteed. Correspondents have the choice in their equipment to use either ISDN or the Internet to deliver their reports. More than 20 manufacturers now provide equipment for audio over IP applications. The EBU has issued and verified a standard, EBU TECH 3326-2007, which allows for interoperability between previously not compatible Audio over IP codecs. A plug-test between nine manufacturers held in February 2008 proved that earlier incompatible units now can connect according to the new standard.
Convention Paper 7322 (Purchase now)

P2-2 Audio Fingerprint and its Applications to Peer-to-Peer Systems Antonello D'Aguanno, Goffredo Haus, Università degli Studi di Milano - Milano, Italy
In this paper we want to analyze the applicability of audio-fingerprint technology to peer-to-peer systems. Audio-fingerprint is a technology commonly applied to scopes like audio identification or digital rights management. Peer-to-peer is a common Internet paradigm to share various digitalized contents. We propose an improvement for typical peer-to-peer architectures (query flooding, centralized directory, hybrid architecture) that permits the application of audio fingerprint technology to these systems.
Convention Paper 7321 (Purchase now)

P2-3 Audible ICMP Echo Responses for Monitoring Ultra Low Delayed Audio Streams Alexander Carôt, University of Lübeck - Lübeck, Germany; Alain B. Renaud, Queen’s University Belfast - Belfast, Northern Ireland, UK; Christian Werner, University of Lübeck - Lübeck, Germany
Playing live music on the Internet is very demanding in terms of delay, loss, or jitter and hence requires extremely reliable network conditions. Jitter is the most problematic factor because it has a direct influence on the required network buffer sizes for receiving low delay audio streams. Therefore, measuring the amount of jitter is a very complex task due to the multi-hop architecture of the Internet. So far it has been impossible to know at which hop these delay variances appear. The authors propose a solution that is able to generate an audible impression of the jitter problem for each hop.
Convention Paper 7320 (Purchase now)

P2-4 A Grid-Based Approach to the Remote Control and Recall of the Properties of IEEE1394 Audio Devices Philip Foulkes, Richard Foss, Rhodes University - Grahamstown, South Africa
Typically, the configuration of audio hardware and software is not integrated. This paper discusses a software system that has been developed to remotely control and recall the properties of IEEE1394 (FireWire) audio devices via a series of graphical routing matrices. The software presents sound engineers with a graphical routing matrix that shows, along its axes, the available FireWire audio devices on a FireWire network. Inter device connection management may be performed by selecting the cross points on the grid, and intra device control may be performed via device editors that are displayed via the axes of the matrix. The software application may be hosted by a compatible Digital Audio Workstation (DAW) application to allow for the storing and recalling of the various properties associated with the devices.
Convention Paper 7323 (Purchase now)

P2-5 Can the Public Internet Be Used for Broadcast? Simon Daniels, Audio Processing Technology - Belfast, Northern Ireland, UK
This paper will look at a number of examples of remote broadcasts over contended IP links and examine the key points in their success. We will talk about issues such as jitter and latency and considerations regarding essential features on IP codec equipment. The experiences of major European broadcasters trialing audio over the Public Internet will form the basis of a discussion of the pitfalls and possibilities associated with using the public Internet for essential broadcast links.
Convention Paper 7324 (Purchase now)

Last Updated: 20080612, tendeloo