Exploiting reality with multicast groups

Macedonia, M.; Zyda, Michael; Pratt, David R.; Brutzman, Don; Barham, Paul T.

doi:10.1109/38.403826

Cited by 147 publications

(63 citation statements)

References 7 publications

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“…Each user only receives messages (position update or interaction message) from relevant regions. This can be done by server-side message filtering, or via network-support such as multicast [10]. However, region size can be difficult to determine (Figure 2).…”

Section: Figure 1: Each Dot Represents a User In The Virtual World Amentioning

confidence: 99%

VON: a scalable peer-to-peer network for virtual environments

Chen

2006

IEEE Network

214

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Section: Figure 1: Each Dot Represents a User In The Virtual World Amentioning

confidence: 99%

VON: a scalable peer-to-peer network for virtual environments

Chen

2006

IEEE Network

214

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“…This is motivated by possible use in a wide range of applications such as concert hall and architectural design (Naylor, 1993), advanced multimedia applications in Virtual Reality to enhance presence (Calvin et al, 1993;Macedonia et al, 1995) and, more recently, immersive video games (Moeck et al, 2007;Raghuvanshi et al, 2007;Grelaud et al, 2009). The computer graphics community has recently been involved more closely with this research.…”

Section: Introductionmentioning

confidence: 99%

Acoustic Rendering and Auditory–Visual Cross‐Modal Perception and Interaction

Hulusić

Harvey

Debattista

et al. 2012

Computer Graphics Forum

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In recent years research in the three-dimensional sound generation field has been primarily focussed upon new applications of spatialised sound. In the computer graphics community the use of such techniques is most commonly found being applied to virtual, immersive environments. However, the field is more varied and diverse than this and other research tackles the problem in a more complete, and computationally expensive manner. Furthermore, the simulation of light and sound wave propagation is still unachievable at a physically accurate spatio-temporal quality in real-time. Although the Human Visual System (HVS) and the Human Auditory System (HAS) are exceptionally sophisticated, they also contain certain perceptional and attentional limitations. Researchers, in fields such as psychology, have been investigating these limitations for several years and have come up with findings which may be exploited in other fields. This paper provides a comprehensive overview of the major techniques for generating spatialised sound and, in addition, discusses perceptual and cross-modal influences to consider. We also describe current limitations and provide an in-depth look at the emerging topics in the field.

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“…In many collaborative virtual environments [27,17], a single sender sends data to multiple recipients over the Internet Multicast Backbone (MBONE) [9]. This technique allows a host to scalably transfer information to multiple recipients.…”

Section: Introductionmentioning

confidence: 99%

Hybrid and forward error correction transmission techniques for unreliable transport of 3D geometry

2005

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Abstract. The continual improvement in computer performance together with the prevalence of high-speed network connections having high throughput and moderate latencies enables the deployment of multimedia applications, such as collaborative virtual environments, over wide area networks. These applications can serve as simulated environments in scenarios such as emergency response training to catastrophic disasters, military training, and entertainment. Many of these systems use 3D graphics for display and may be required to distribute geometric models on demand between participants. Progressive meshes provide an attractive mechanism for such distribution. Previous uses of progressive meshes have sent data using reliable protocols (TCP). However, such protocols have disadvantages in on-demand settings, in that they: (1) use flow control, which limits performance in wide area networks; (2) add additional bandwidth when there is loss; (3) treat all loss as an indication of congestion; and (4) require feature-rich multicast support, which is not always available. In this paper, we modify progressive mesh models to allow reconstruction even in the event of packet loss. We use these modifications in two transmission schemes, a hybrid transmission that uses TCP and UDP to send packets and a forward error-correcting transmission scheme that uses redundancy to decode the information sent. We assess the performance of these transmission schemes when deployed on network testbeds that simulate wide-area and wireless characteristics.

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Exploiting reality with multicast groups

Cited by 147 publications

References 7 publications

VON: a scalable peer-to-peer network for virtual environments

VON: a scalable peer-to-peer network for virtual environments

Acoustic Rendering and Auditory–Visual Cross‐Modal Perception and Interaction

Hybrid and forward error correction transmission techniques for unreliable transport of 3D geometry

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