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In recent years, Peer-to-Peer (P2P) multimedia streaming has become an alternative to cable/satellite TV services. Many P2P streaming applications further provide users with DVD-like operations: play, pause, chapter selection, fast-forward, and rewind. Such a real-time interactive multimedia streaming is commonly referred to as the P2P Video-on-Demand (VoD). To further improve the streaming quality,...
How to provide user-satisfied video services must be solved in the future wireless communication systems. However, most of existing works focused on the PHY-MAC cross layer schemes do not consider the end-to-end video quality of service (QoS) and hence can only provide limited user-perceived video quality improvements. In this paper, a novel video transmission scheme with guaranteed end-to-end QoS...
Long-term evolution (LTE) represents a promising technique for ubiquitous multimedia communication because of its significant enhancement to the data transmission rate. However, the hard hand-off (HO) procedure standardized in LTE is a menace to multimedia quality of service (QoS), due to the service interruption introduced by the procedure. Thus, one major challenge of such a system is to design...
Multi-view video consists of multiple video sequences captured simultaneously from different angles by multiple closely spaced cameras. It enables the users to freely change their viewpoints by playing different video sequences. Transmission of multi-view video requires more bandwidth than conventional multimedia. To reduce the bandwidth, UDMVT (User Dependent Multi-view Video Transmission) based...
In telecommunication services, alongside QoS, QoE provision has become essential, thus performance and quality evaluation measurement results need to reflect reality as much as possible. Our goal is to enhance QoE evaluation schemes and enable improved QoE provision for video applications and services anytime and anywhere. In order to eliminate potential erroneous conclusions of QoE assessment techniques,...
Although video conferencing and its related applications have grown into a significant research area, the limited scalability of conference size is still a major problem. In this paper, a range of strategies for real-time area of interest (AOI) management in a 3D immersive video conference (IVC) are evaluated with the objective of minimising the required video transmission capacity and hence maximising...
For the design of real-time embedded systems, analysis of performance and resource utilization at an early stage is crucial to evaluate design choices. Network Calculus and its variants provide the tools to perform such analyses for distributed systems processing streams of tasks, based on a max-plus algebra. However, the underlying model employed in Network Calculus cannot capture correlations between...
On real-time video streaming, the distribution with multi-tree Application Level Multicast (ALM) is effective in terms of delay and jitter. In constructing multi-tree networks, a joining node selects counterpart nodes based on their performance or bandwidth capacity and they are connected each other. However, tree-based ALM has the overhead of reconstructing the tree topology when any node leaves...
This paper presents an Adobe Flash-based augmented reality video streaming application and its practical use in web marketing. The application enables augmenting the content of a web cam view by adding video content to it. Aller Media, a Nordic media company, used the application for advertising two Finnish movies with promotional video content. We have examined combining of conventional print media...
The character of the input flow changes with an increasing amount of multimedia services. The most common classical stochastic models suppose an exponential distribution of interarrival times, i.e. the Poisson input flow. This paper shows the significant influence of probability distribution functions of interarrival times, such as the exponential, the hyper-exponential and the Erlang's of the order...
Resource allocation play an important role in service composition for cloud-based video surveillance platform. In this platform, the utilization of computational resources is managed through accessing various services from Virtual Machine (VM) resources. A single service accessed from VMs running inside such a cloud platform may not cater the application demands of all surveillance users. Services...
We investigated the use of caching of packets containing video at intermediary routers to reduce the delay and energy consumption of Automatic Repeat reQuest (ARQ) error recovery. We modeled the two mathematical programs that select the optimal set of routers to have caching ability, one to minimize energy consumption and the other to minimize retransmission delay. Both of these mathematical programs...
The main challenge for provisioning of Mobile TV services is to overcome long burst errors as are often found in mobile reception conditions. Long time interleaving can be implemented by means of Application Layer FEC (AL-FEC) to increase the time diversity of the signal and thereby its robustness against burst errors. The main obstacle of long time interleaving for streaming services is the increase...
A drastic increase in traffic of mobile broadband is seen in the past few years, which is further accelerated by the increased usage of smart phones and its applications. The availability of good smart phones and better data connectivity are encouraging mobile users to use video services. This huge increase in usage will pose a lot of challenges to the wireless networks. The existing wireless networks...
Electronic learning has produced a comfortable, sophisticated, interactive and adaptable teaching model. Moreover, the consistent technical progress in this field allows the development of increasingly interesting applications [1]. We chose to select those elements to create an e-learning environment. This paper presents a model of the multi-tiered e-learning system based on Web Services. It shows...
Video streaming over mesh networks operates under stringent network resource constraints, with a large number of video sessions competing for limited network resources. In this work, we aim to establish so-called resource-distortion models to characterize the inherent relationship between the allocated network resources to each video session and its end-to-end video distortion or presentation quality...
Multiple Description (MD) source coding is a technique that breaks a media stream into equally important sub-streams which can be sent over different paths for protection against channel errors in wireless networks. In this paper, we explore the possibility of sending the descriptions through different paths and intermediately merging them to exploit recovery of the corrupted descriptions from the...
We propose the Most-Emergent-First (MEF) scheduler which regard the emergency score obtained from the delay status and traffic specification (TSPEC) to determine transmit sequence of flows. Via cross-layer signaling, transmission opportunities (TXOPs) of flows are dynamically adjusted to meet the TSPEC while the bandwidth utilization in a IEEE 802.11e environment is maintained. The proposed prioritized...
Most home computers have upload bandwidths that do not allow them to stream good quality video. As a result, they cannot fully participate in peer-to-peer video streaming solutions. We propose to address that issue by letting these clients use the storage space they have on one or more remote servers. Each time a client plays a streaming video, it will upload a copy of that video to one of these servers...
Using Peer-to-Peer (P2P) overlay networks have become a progressively popular approach for streaming live media over the Internet due to their deployment simplicity and scalability. In this paper, we propose a new hybrid push-pull live P2P video streaming protocol called PPM that combines the benefits of pull and push mechanisms for video delivery. Our main goal is to minimize the network end-to-end...
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