Wide Area Audio Synchronisation
نویسندگان
چکیده
In this short paper we describe a Wide Area Audio Synchronisation demonstration using the Quality of Service (QoS) facilities of the Nemesis operating system. The Nemesis operating system is a result of the ESPRIT funded Pegasus I research project. A stereo audio stream is split with each channel being input to one of two distinct network digitisation devices; one of the resulting streams is sent via a wide area network to a foreign country, and the two streams are then resynchronised entirely in software. Playout on a digital speaker device was analysed and found to be correct to within 150 s, which is the resolution of the timer hardware on the workstation used. The accuracy of this resynchronisation demonstrates the effectiveness of the Nemesis QoS techniques.
منابع مشابه
Synchronisation for Distributed Audio Rendering over Heterogeneous Devices, in HTML5
The HTML5 standard is wide-spread on mobile devices. In combination with the Web Audio API, it allows for massively distributed real-time audio rendering. But timing issues exist, mainly because of the lack of standard inter-device synchronisation. This paper proposes a synchronisation solution based on HTML5. Using a shared reference time, we achieved the distributed rendering of audio events ...
متن کاملPortAudio and Media Synchronisation - It's All in the Timing
PortAudio is an open source 'C' language API and library for implementing cross-platform real-time audio applications. This paper describes recent additions to the PortAudio API designed to assist in implementing synchronisation between real-time audio and other time-based data such as MIDI and computer graphics. Examples are presented that illustrate synchronisation of a graphical display to r...
متن کاملOrchestration Services for Distributed Multimedia Synchronisation
Rapid developments in networking technology over the past few years have lead to the emergence of distributed applications which incorporate continuous media data types such as digital video and audio. Such applications have stringent real-time synchronisation requirements which have been documented in the literature. However, little research has been carried out into suitable mechanisms to sup...
متن کاملThrough-the-Lens Synchronisation for Heterogeneous Camera Networks
Camera synchronisation involves the temporal alignment of a set of video sequences, independently acquired by two or more cameras. Accurate synchronisation is crucial for a wide variety of applications requiring multi-camera setups, ranging from 3D modelling of dynamic scenes (e.g., featuring a performance, or a sports event) to video surveillance and superresolution. Conventional synchronisati...
متن کاملA Synchronisation Method for Informed Spread-spectrum Audio Watermarking
Under perfect synchronisation conditions, watermarking schemes employing asymmetric spread-spectrum techniques are suitable for copy-protection of audio signals. This paper proposes to combine the use of a robust psychoacoustic projection for the extraction of a watermark feature vector along with non-linear detection functions optimised with side-information. The new proposed scheme benefits f...
متن کامل