Realization of an Adaptive Distributed Sound System Based on Global-Time-Based Coordination and Listener Localization

Henrich, E.; Colmenares, Juan A.; Fujiwara, Kayo; Im, Chansik; Kim, K.H.; Zheng, Liangchen

doi:10.1109/isorc.2008.87

Cited by 9 publications

(5 citation statements)

References 13 publications

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“…However, their emphasis was not on tightly bounded message loss detection latencies. New‐generation RT DC applications that require tight bounds on message loss detection latencies, especially networked multimedia applications, are demanded at an increasing rate nowadays .…”

Section: Related Workmentioning

confidence: 99%

“…A high‐precision time base accessible from everywhere in a networked computing environment is essential in realizing RT DC applications . A global time base can be established by synchronizing the local clocks of DC nodes among themselves.…”

Section: Message‐loss‐tolerant Clock Synchronization For 80211 Wirelmentioning

confidence: 99%

“…The essence of the approaches for using DB‐RMS in an RT DC object/component network is further discussed here. To make the discussion in a concrete form, we considered the Time‐Triggered Message‐Triggered Object (TMO) programming scheme, which is a high‐level RT DC object network programming scheme and has been demonstrated as an effective approach for building a number of advanced applications . Most of the issues and approaches are considered to be relevant to other RT DC object programming environments as well.…”

Section: Incorporation Of Delay‐bounded Reliable Messaging Scheme Intmentioning

confidence: 99%

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A scheme for reliable real‐time messaging with bounded delays

et al. 2011

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SUMMARY Network‐based real‐time computing applications that require tightly bounded end‐to‐end delays have been increasing at a steady rate in recent years. A messaging layer that yields tight bounds on the latencies in detecting message losses and enables the application layer to initiate a timely recovery action has thus become highly desirable. In this paper, we present a new reliable real‐time messaging scheme called the Delay‐Bounded Reliable Messaging Scheme (DB‐RMS) that is aimed at meeting such requirements. It is built on top of the User Datagram Protocol sub‐layer. DB‐RMS provides multiple service options, each with different fault detection/recovery capabilities and different costs in terms of the execution overhead. This feature makes DB‐RMS suitable for a variety of applications. In this paper, the DB‐RMS service options and the corresponding support protocols are presented first followed by a formal analysis on the detection and reaction latency bounds under various service options. A messaging layer prototype using DB‐RMS has been implemented. To demonstrate the practice of the DB‐RMS, we implemented a clock synchronization algorithm for 802.11 wireless local area networks on top of the DB‐RMS messaging layer. Performance measurements of the prototype implementation have been taken, and the positive results obtained are also presented. Copyright © 2011 John Wiley & Sons, Ltd.

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Section: Related Workmentioning

confidence: 99%

Section: Message‐loss‐tolerant Clock Synchronization For 80211 Wirelmentioning

confidence: 99%

Section: Incorporation Of Delay‐bounded Reliable Messaging Scheme Intmentioning

confidence: 99%

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A scheme for reliable real‐time messaging with bounded delays

et al. 2011

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“…After the location of the listener becomes known, each player node, i-th node, can adjust the playback-timing of each sound packet by reflecting d i , the distance from itself to the listener, as follows [5]:…”

Section: Location-dependent Optimal Play Via Adjustment Of the Plamentioning

confidence: 99%

“…In many networked real-time embedded computing such as this digital music ensemble application, exploiting the principle of glottal-Timebased Coordination of Distributed computing Actions (TCoDA) is of fundamental importance [2,5]. To enable such TCoDA exploitation in efficient manners and also to ease the maintenance and expansion of the software of AMAS, we adopted the Time-triggered Message-triggered Object (TMO) programming and specification scheme [8,9,10] for implementing the software.…”

Section: Introductionmentioning

confidence: 99%

Structuring of an Adaptive Multi-channel Audio-Play System Based on the TMO Scheme

Kim

Zhou

Park

et al. 2010

2010 13th IEEE International Symposium on Object/Component/Service-Oriented Real-Time Distributed Computing Workshops

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This paper presents a modular and easily analyzable design of a flexible sound rendering system called the Adaptive Multi-channel Audio-play System (AMAS). This casestudy is a follow-on of the earlier study on the effectiveness of the TMO scheme as an approach for easily analyzable efficient design of a major class of real-time distributed multimedia computing applications. AMAS is an extension of the earlier developed distributed sound system. In AMAS a set of player nodes which are single-board computers equipped with speakers and micro-phones are connected via Ethernet to a controller node equipped with audio file storage and user interfaces. Multichannel music is played in manners adaptive to the locations of the speakers and the listener. In addition, AMAS possesses the mechanisms for creating the effects of specified sound-generator objects (SGOs), e.g., musical instruments, positioned differently from the positioning that existed at the time of original recording.The TMO-based design and implementation approaches effective for realization of high-quality AMAS are presented.Some experimental evaluation results are also presented1.

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Lifting the Level of Abstraction Dealt with in Programming of Networked Embedded Computing Systems

Kim

2009

Software Technologies for Embedded and Ubiquitous Systems

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Abstract. The scale and complexity of advanced networked embedded computing (NEC) application systems are steadily growing. The need has become increasingly acute for a programming method and style that imposes much less amounts of detail-handling on the real-time (RT) distributed computing (DC) programmer than the currently widely used method does. With this motivation a number of different attempts have been made toward establishing high-level RT DC objects. The TMO scheme developed over the past 18 years by the author and his collaborators is one of those attempts. In terms of lifting the level of abstractions of main program building-blocks, the TMO scheme has been about the most daring attempt. However, all the attempts have not yet reached the level of sufficient maturity in that the ease of guaranteeing the timeliness of critical output actions with a high degree of precision has not been much demonstrated. Some basic principles and techniques learned from past research on TMO are briefly reviewed. Then major remaining research issues are discussed.

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Realization of an Adaptive Distributed Sound System Based on Global-Time-Based Coordination and Listener Localization

Cited by 9 publications

References 13 publications

A scheme for reliable real‐time messaging with bounded delays

A scheme for reliable real‐time messaging with bounded delays

Structuring of an Adaptive Multi-channel Audio-Play System Based on the TMO Scheme

Lifting the Level of Abstraction Dealt with in Programming of Networked Embedded Computing Systems

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