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Open AccessProceedings Article

Low-Latency Interaction through Choice-Points, Buffering, and Cuts in Tactus

TLDR
In interactive media presentations where there are a small number of choices, alternative streams can be prefetched to reduce latency, supported by the Tactus system, which manages the computation and synchronization of multimedia data.
Abstract
Multimedia streams usually require prefetching and buffering to ens’ure steady, glitch-fnee dehery to audio and video displays, but buffering ca’uses undesirable latency. This latency may be manifested as startup delays, glitches, dropouts, and loss of synchronization. In interactive media presentations .where there are a small number of choices, alternative streams can be prefetched to reduce latency. This technique is supported by the Tactus system, which manages the computation and synchronization of multimedia data. Tactus offers a systematic approach to prefetching, precomputation, choice points, and synchronous c,uts. Tactus consists of an object-oriented client toolkit for media generation and a synchronization seruer for me

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Citations
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Proceedings ArticleDOI

Dealing with synchronization and timing variability in the playback of interactive session recordings

TL;DR: It is shown that the inter-stream asynchrony in a session object is under statistical control as a function of the scheduling interval, and the mechanisms could be generalized to the replay of streams that are subject to timing variability.
Dissertation

Prefetching techniques for client server object-oriented database systems

Nils Knafla
TL;DR: This work designed a technique, called OSP, which prefetches pages according to a time constraint established by the duration of a page fetch, and developed a cost model for the benefit of a prefetch and the extra cost of an incorrect prefetch.
Dissertation

Synchronized structured sound : real-time 3-dimensional audio rendering

TL;DR: This research takes the audio components of a script and interactively renders them with respect to the position of the listener/viewer and produces a real-time three-dimensional structured audio/video system.

Performance Measurements of the Multimedia Testbed on Real-Time Mach

TL;DR: Although the fixed-priority scheduling of Real-Time Mach is a substantial improvement, user threads are still preempted by device drivers, and the overall real-time performance is not suitable for multimedia applications.
Dissertation

Interactive delayed-sharing of computer-supported workspaces via the streaming of re-executable content

TL;DR: This dissertation pioneers the re-execution approach to the record and replay of sessions for supporting computer-supported collaborative work and introduces a novel paradigm for flexible support of asynchronous collaboration that allow users to collaborate by annotating, editing, and refining these delayed-shared workspaces.
References
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Journal ArticleDOI

A continuous media I/O server and its synchronization mechanism

TL;DR: Acme, a network server for digital audio and video I/O, is presented and the nature of logical time systems is discussed, some examples are given, and their implementation is addressed.
Journal ArticleDOI

Network support for multimedia: a discussion of the Tenet approach

TL;DR: A suite of protocols are described that embody the principles of realtime communication, and their implementations in several environments, that embody these principles, and work in progress that will lead towards more complete solutions.
Book ChapterDOI

A Continuous Media Player

TL;DR: The design and implementation of a continuous media player for Unix workstations that can play synchronized digital video and audio read from a file server is described.
Journal ArticleDOI

Spatio-temporal composition of distributed multimedia objects for value-added networks

TL;DR: The overall process necessary to perform spatial and temporal data composition for a distributed multimedia information system is addressed and it is found that temporal composition can be most suitably achieved at the workstation.
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