The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper addresses multimedia aspects in messaging services. It highlights the functionalities that are missing to provide what we call a complete multimedia mail service and it gives standard solutions to integrate those additional functionalities in standard messaging systems. A complete multimedia messaging system does not provide only means to exchange simple multimedia messages having...
In this paper, a teleservice for archiving and retrieving multimedia documents using public networks is described. This teleservice encourages a broad range of commercially applicable multimedia archiving applications suitable for an asynchronous access mechanism. It is based on an integrated architecture comprising stand alone archive clients and a multimedia archive server which is realized using...
The Global Store Server is part of the Multimedia Mail architecture which is currently being realized within the BERKOM Project Multimedia Teleservices, funded by the German Telekom and managed by DeTeBerkom. This paper focuses on the various motivations behind the usage of and design criteria for the development of a Global Store Server. A comparison to other multimedia mail activities coping...
We are on the brink of another major step in the age of “information”, stimulated by: Firstly multimedia computing characterized by a wide range of potential applications that combine information sources such as voice, graphics, hifi quality audio and video. Secondly advances in network technology which have made it feasible to build high-speed networks operating at hundreds of Mbit/s over long distances...
In recent years there has been dramatic progress on the enabling technologies for workstation-based multimedia teleconferencing applications. We expect that such applications will soon become an important component of many future social and business interactions. Teleconferencing applications have aspects of their state, such as membership, types of media being used, and encryption, that are under...
Nowadays, the design of cooperative applications is becoming more complex due to the introduction of real time cooperation and multimedia aspects. To ease and accelerate the development of these applications it is necessary to build modular and reusable functional components that can be used by application designers. The objective of this paper is to define some of those functional components...
An open architecture that achieves seamless binding between networking and multimedia devices is proposed. The building blocks of the binding architecture consist of a set of interfaces, methods and primitives. The former abstract the functionalities of multimedia networking devices and are organized into a binding interface base. The methods and primitives are invoked for implementing binding applications...
In this paper, an implementation framework of a generic end-to-end QoS management scheme is presented. Then, the compliance of the proposed scheme to the ODP (Open Distributing Processing) reference model is verified, by illustrating the correspondence of the various components of the proposed scheme to RM-ODP. The implementation of the end-to-end QoS scheme on a micro kernel based system is then...
Formal description techniques have been applied successfully to the fields of communications and distributed systems. We argue, however, that the recent emergence of multimedia computing will have a significant impact on this work. In particular, existing formal description techniques do not satisfactorily model the real-time behaviour exhibited by distributed multimedia systems. This paper considers...
With the advance of communication technology, integrated services networks make possible real-time, multimedia applications. Unlike traditional data traffic, real-time multimedia traffic requires synchronization; temporal relationships among media must be maintained. Yet delay jitter and the absence of a global clock may disrupt these temporal relationships. This paper introduces new group synchronization...
Communication of multimedia data among multiple parties can be costly in terms of use of network resources if guaranteed quality of service is requested. We believe, however, that knowledge of the functional characteristics of real applications can be helpful to devise new mechanisms to support isochronous communication efficiently. In this paper we follow this approach to introduce a new communication...
This paper deals with the Quality of Service (QoS) negotiation for multicast connections. First, we show that in the multicast case, the QoS parameters may be separated into two classes, namely the parameters whose scope is the whole multicast connection and those whose scope is limited to each receiver separately. Then, after a brief presentation of the enhanced QoS defined in the OSI95 transport...
Existing and upcoming distributed multimedia applications require highly diverse services to satisfy their communication needs. Service integrated communication systems should be capable of providing high-performance real-time multipoint communication service with guaranteed quality of service (QoS). Existing communication systems and known strategies for resource reservation face increasing difficulties...
Future networking environments will have different characteristics from actual ones. The network service is expected to provide more bandwidth and be more reliable, and applications data will be generated from different type of sources making different requirements from data transfer protocols. Rather than trying to adapt an existing transport protocol to this new environment, we decided to develop...
Video/Audio packet transport over IP (ver. 4) networks is not guaranteed for real-time communication if network congestion occurs due to excessive traffic load. Congestion avoidance control is thus necessary for real-time video/audio communication over IP networks. An adaptive video bit rate control scheme that detects the onset of congestion is designed to achieve real-time visual communication and...
Because of the admission control schemes in computer networks, in many multimedia communication scenarios it is not possible to get guaranteed quality of service for data transmission along the entire route from sender to receiver. In such cases scaling mechanisms can be used to overcome problems caused by resource congestion. Whenever resource bottlenecks are noticed, the multimedia traffic through...
Resource Allocation for variable bit rate video traffic is still a crucial problem due to the complex traffic characteristics of compressed video. This paper presents the results of a traffic study showing the effect of video contents on the bandwidth needed by interactive multimedia applications to transfer video in a loss-free context. Mpeg compression has been applied to four movies with different...
ATM, the Asynchronous Transfer Mode cell-based switching technique, was finally recognized in 1992 by the relevant International standardization entities, as the switching and multiplexing solution for implementing the future Broadband Integrated Services Digital Network (B-ISDN). Because of its service-independent characteristics. ATM will provide B-ISDN with capabilities for integrated support of...
For the past 5 years, ITU-T (formerly CCITT) has been standardising a suite of protocols for Audiographic and Audiovisual conferencing for use over a range of networks. The standards form a basis for a range of real-time interactive services such as Reservation & Conference set-up, Conference information, Chair controls, File transfer, Group editing, Whiteboards, Multiple pointers on screen, Multiple...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.