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Converting audio signal to packet stream and propagating through wireless local area network (Wi-Fi technology) to loud speakers that may be located at different rooms will be a popular scenario of multimedia applications. Since the packets received by separate speakers varied with the transmission paths and environment to them, this made the playable contents different from one speaker to another...
The increased popularity of social media and mobile devices has radically changed the way people consume multimedia content online. As an example, users can experience the same event (e.g. a sports event or a concert) together using social media, even if they are not in the same physical location. Moreover, the introduction of the HTTP Adaptive Streaming principle has made it possible to deliver video...
The continuing growth in the mobile phone arena, particularly in terms of device capabilities and ownership, is having a transformational impact on media consumption. It is now possible to consider orchestrated multistream experiences delivered across many devices, rather than the playback of content from a single device. However, there are significant challenges in realizing such a vision, particularly...
In this paper, we introduce a method for synchronization of multiple devices based on context sharing and system design for multimodal contents service. A main advantage we can expect from our system environment is eliciting abundant function features of each device and exploiting them for rendering multimodal information in more efficient ways. To make it feasible, context s haring takes a significant...
The portion of video traffic in the total amount of Internet traffic has been increased. As the number of users and volume of content are increased, the content providers had been suffered for processing and transferring media and they have adopt CDN technology into their service so that their burden can be alleviated. The CDN technology can be classified into three different types; ‘server farm CDN’,...
We developed a robust approach that can be synchronized with accuracy to a media streaming group in a network congestion situation. This approach consists of a server-side and client-side algorithm. The server-side algorithm is used to transmit the playback information using a synchronization control packet to clients. The synchronization control packet is transmitted in an event-driven manner. The...
Synchronous, and real-time web-based collaboration on text and multimedia content is a hot research subject. Currently collaborative multimedia applications are loosely defined. It is current practice to consider any application that allows users to connect to each other in order to exchange information in writing or through video streams, in real-time, or near real-time, as a “collaborative application”...
In this paper, we propose an effective design and implementation of a versatile embedded multimedia live streaming decoder system based on TI's DM814x processor, which can not only decode video live streams of various video codecs(H.264, MPEG-4, etc.), audio live streams of various audio codecs(AAC, MP3, G.711, etc.), but also demultiplex (demux) MPEG-2 TS, decode video stream and audio streams inside,...
This paper aims to present a transmission system model for a free-viewpoint television (FTV) service considering service scenarios. The proposed system model is based on the hy-bridcast of the digital terrestrial television broadcasting network and content delivery communication network. Also we propose the packet structure for the FTV transmission system considering the system requirement. The proposed...
The amount of multimedia content on the internet has been growing at a remarkable rate, and users are increasingly looking to share online media with colleagues and friends on social networks. Several commercial and academic solutions have attempted to make it easier to share this large variety of online content with others, but they are generally limited to sending links. Existing products have not...
In this paper, we propose a tracker-based Peer to Peer (P2P) system for live multimedia streaming services. Our system is based on the Proactive network Provider Participation for P2P (P4P) framework which induces the cooperation between P2P systems and network service providers to achieve the best possible P2P application performance and efficient and fair usage of network resources. In the proposed...
The traditional way to composite texts and images over a video clip for presentation encounters such problems as time consuming, instructor skill scarcity, video retrieval difficulty, and video quality loss, especially, in internet high-compressed video materials. To solve these problems we develop a real-time remix platform for video-based presentation which can edit and synchronize online/offline...
One of the most important enablers when assembling a modern ubiquitous computing system is distribution of multimedia content throughout a home and control of its playback. Additionally, ambient intelligence requirements include playback timeline programming, interaction with sensors and event-based playback triggering. Normally there is a central server dedicated to content storage and streaming...
Quality of Service (QoS) is still one of the major challenges for emerging services based on the Real-Time Transport Protocol (RTP) to deliver multimedia content. In the context of the Internet Protocol Television (IPTV) services, the synchronization of multimedia components plays an important role. In order to synchronize audio and video components of multimedia content, RTP timestamps have to be...
The composition and characteristics of real-time transport protocol (RTP) for voice is firstly discussed in this paper. According to RTP protocol and its related functions, in the Windows environment it uses WinSock (Windows Sockets) and multimedia library provided by Windows SDK to realize the implementation of RTP/RTCP protocol, and apply Visual C++ to design a real-time voice transmission software,...
Recently, the requirements for the real-sense media representation are arising rapidly. Until now, most people mainly used the method SMSD on one device, but we need more than one device to play multiple A/V and multiple sensory effects for effective real-sense media representation. Therefore, multiple A/V device synchronization and multiple sensory effect device synchronization are very important...
Technology of multimedia communications on network is rapidly developing today. SIP (Session Initiation Protocol), which plays an important role in 3G standards, is well applied in multimedia conferencing systems. Traditionally, most SIP-based conferencing systems have been limited in scalability due to their tightly coupled centralized structures. However, distributed conferencing based on SIP is...
This paper proposes a media synchronization method for real-time group communication within a multiple device environment. The method controls the output time of each media unit received at multiple devices and synchronizes them, even if the arrival time of the media unit temporarily fluctuates. This fluctuation is caused by variation in bandwidth and the network delay between different access networks...
The Eureka-ITEA2 WellCom project addresses issues related to the creation, delivery and management of advanced multimedia applications and services in the context of distributed home environment. To enable the delivery of such services with the required quality and security, WellCom proposes to push a part of the service logic as close as possible to the end-user. The paper presents some results of...
IP networks allow constructing versatile device configurations for multimedia streaming. However, the stochastic nature of the packet-switched data transmission may complicate IP-based implementations of some conventional applications such as analog wired transmission of synchronized multi-channel audio. This paper introduces a multimedia streaming system based on the synchronization of multiple playback...
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