In new collaborative multimedia applications, there is a need for overall control, beyond the level of quality of service (QoS) as pertaining to individual streams in isolation of others. At every instant in time, the quality of the session, as perceived by the end user, depends on the priorities of the on-going streams, according to the application semantics, as well as on the actual QoS offer...

In recent years, there has been an increasing interest in extending traditional stream processing engines with logical, rule-based, reasoning capabilities. This poses significant theoretical and practical challenges since rules can derive new information and propagate it both towards past and future time points; as a result, streamed query answers can depend on data that has not yet been receiv...

This memo describes extensions for the RTP payload format defined in RFC 3640 for the transport of MPEG Surround multi-channel audio. Additional Media Type parameters are defined to signal backwardscompatible transmission inside an MPEG-4 Audio elementary stream. In addition, a layered transmission scheme that doesn’t use the MPEG-4 systems framework is presented to transport an MPEG Surround e...

This memo describes extensions for the RTP payload format defined in RFC 3640 for the transport of MPEG Surround multi-channel audio. Additional Media Type parameters are defined to signal backwardscompatible transmission inside an MPEG-4 Audio elementary stream. In addition, a layered transmission scheme that doesn’t use the MPEG-4 systems framework is presented to transport an MPEG Surround e...

We study various operations for partitioning, projecting and merging streams of data. These operations are motivated by their use in dataflow programming and the stream processing languages. We use the framework of stream calculus and stream circuits for defining and proving properties of such operations using behavioural differential equations and coinduction proof principles. We study the inv...

Equipment manufacturers research and development CaptureVuTM technology allows rapid isolation and debugging of equipment and system faults Multiplexer/remultiplexer allows flexible test stream creation and modification Rapid and in-depth analysis of selected elements of transport streams to confirm functionality and compliance to standards Set-top box buffer testing and verification Elementary...

An Internet Protocol/Generic Stream Encapsulation (IP/GSE) signalling framework is proposed to replace the current MPEG-2 Transport Stream (TS) Table-based signalling system and to enable smoother convergence of Digital Video Broadcasting (DVB) transmission systems and IP networks. GSE suitability is explained and a review of IP-based signalling techniques is presented in order to select the op...

Data stream processing has become increasingly important as many emerging applications call for sophisticated realtime processing over data streams, such as stock trading surveillance, network traffic monitoring, and sensor data analysis. Stream joins are among the most important stream processing operations, which can be used to detect linkages and correlations between different data streams. ...

Scalable execution of expensive continuous queries over massive data streams requires input streams to be split into parallel substreams. The query operators are continuously executed in parallel over these sub-streams. Stream splitting involves both partitioning and replication of incoming tuples, depending on how the continuous query is parallelized. We provide a stream splitting operator tha...