Multimedia Communication Systems Techniques Standards And Networks Pdf
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- Multimedia Communication Systems: Techniques, Standards, and Networks
- Multimedia Communication Systems: Techniques, Standards and Networks
- Multimedia Communication Systems: Techniques, Standards, Networks
Bojkovic Dragorad A. Rao available from Rakuten Kobo. Rapid progress in software, hardware, mobile networks, and the potential of interactive media poses many questions for r.
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The challenge of multimedia communications is to provide services that integrate text, sound, image and video information and to do it in a way that preserves the case of use and interactivity. A brief description of elements for multimedia systems is presented. User and network requirements are discussed together with pocket transfer concept.
An overview of multimedia communication standards is given. The issues concerning multimedia digital subscriber lines are outlined together with multimedia over wireless, mobile and broadcasting networks as well as digital TV infrastructure for interactive multimedia services. Keywords: multimedia, standard, network, communication, system, user, requirement, asynchronous transfer mode, terminal, Internet, protocol I. Introduction The past years have seen an explosion in the use of digital media.
Industry is making significant investments to deliver digital audio, image and video information to consumers and customers.
A new infrastructure of digital audio, image and video recorders and players, on-line services, and electronic commerce is rapidly being deployed. At the same time major corporations are converting their audio, image and video archives to an electronic form. Digital media offer several distinct advantages over analog media: the quality of digital audio, image and video signals is higher than that of their analog counterparts. Editing is easy because one can access the exact discrete locations that should be changed.
Copying is simple with no loss of fidelity. A copy of digital media is identical to the original. Digital audio, image and videos are easily transmitted over networked information systems.
These advantages have opened up many new possibilities. Multimedia data is informally considered as the collection of three M's: multi-source, multi-type and multi-format data.
The interactions among the multimedia components consist of complex relationships without which multimedia would be a simple set of visual, audio and other data.
Multimedia and multimedia communication can be globally viewed as a hierarchical system. The multimedia software and applications provide a direct interactive environment for users. When a computer requires information from remote computers or servers, multimedia information must travel through computer networks. Since the amount of information involved in the transmission of video and audio can be substantial, the multimedia information must be compressed before it can be sent through the network in order to reduce the communication delay.
Constraints, such as limited delay and jitter, are used to ensure a reasonable video and audio effect at the receiving end. Therefore, communication networks are undergoing constant improvements, in order to provide for multimedia communication capabilities. Local area networks are used to connect local computers and other equipment, and wide area networks and the Internet connect the local area networks together. Better standards are constantly being developed, in order to provide a global information superhighway over which multimedia information will travel.
Multimedia communications is the field referring to the representation, storage, retrieval and dissemination of machine-processable information expressed in multiple media, such as text, image, graphics, speech, audio, video, animation, handwriting, data files. With the advent of high capacity storage devices, powerful and yet economical computer workstations and high speed integrated services digital networks, providing a variety of multimedia communications services is becoming not only technically but also economically feasible.
In addition, the broadband integrated services digital network BISDN has been given special attention as a. At first, the concept of multimedia communication modeling will be described, together with user and network requirements, packet transfer concept as well as multimedia terminals.
The second part deals with multimedia communication standards. Finally, we will concentrate on multimedia communications over networks. Multimedia transfer over ATM networks is described. This is followed by multimedia over IP networks.
Special issues relating to multimedia over wireless will be discussed. Namely, it will not only provide communication capabilities and information sharing people, irrespective of location and time, but also easy and immediate access to widely distributed information banks and information processing centers.
Applications in medicine, education, travel, real estate, banking, insurance, administration and publishing are emerging at a fast pace. These applications are characterized by large multimedia documents that must be communicated within very short delays. Computer-controlled cooperative work, whereby a group of users can jointly view, create, edit and discuss multimedia documents, is going to be characteristic of many transactions .
Some glamorous applications on multimedia processing include: distance learning, virtual library access and living books. In distance learning, we learn and interact with instructors remotely over a broadband communication network.
Virtual library access means that we instantly have access to all of the published material in the world, in its original form and format, and can browse, display, print and even modify the material instantaneously.
Living books supplement the written. Applications that are enabled or enhanced by video are often seen as the primary justification for the development of multimedia networks. Trends towards multimedia communication are represented in Fig. Much of the work on packet video has considered fairly homogenous networking scenario .
It would be a proper if a single type of video service dominated in the networks. However, it is not a valid assumption for the traffic issues. First, video will not constitute a uniform service with easily determined behavior and requirements. Secondly, video will not share resources with streams of only the same type. This means that multiplexing in the network should be evaluated for a heterogeneous mix of traffic types. In business areas, there is a potential need for various kinds of new communication system, such as high-speed data networks between geographically distributed local area networks LAN s high definition still picture communication and TV conferencing or corporate cable TV services.
A multimedia communication model is strongly influenced by the manufacturer-dependent solutions for personal computers and workstations including application software on the one hand and by the intelligent network concept on the other [7,8,9,10].
Elements of multimedia systems used in a person-to-person communications and b person-tomachine modes. This comprises data, video or audio taking into account the integration of different information types not being excluded. The first level hides the transport networks and network building blocks from an application designer s or user s point of view.
The second level provides communication support on the basis of information structure and information exchange building blocks for a large number of applications. With regards to the capability of the available resources in each case, the multimedia communication applications must be scalable in order to run in a constant manner across different network and terminal types and capabilities.
There are two key communications modes in which multimedia systems are generally used: person-to-person communications and person-to-machine communications. The key elements of multimedia systems are presented in Fig. As it can be sean both of these modes have a lot of commonality, as well as some differences. In the person-to-person mode shown in Fig. The user interface creates the multimedia signal and allows users to interact with the multimedia signal in an easy-to-use manner.
The transport layer preserves the quality of the multimedia signals so that all users receive what they perceive to be high-quality signals at each user location.
Examples of applications for the person-to-person mode are teleconferencing, videophones, distance learning and shared workspace scenarios. In the person-to-machine mode, shown in Fig. The storage and retrieval mechanisms involve browsing and searching to find existing multimedia data. Also, storage and archiving in order to move user-created multimedia data to the appropriate place for access by others.
Examples of applications for the person-to-machine mode include creation and access of business meeting notes, access of broadcast video and document archives from a digital library or other repositories. From a user s point of view, the most important requirements of multimedia communications are: Fast preparation and presentation of the different information types of interest, taking into account the capabilities of available terminals and services.
Intelligent support of users taking into consideration their individual capabilities, and Standardization. User requirements in terms of services are defined by the media, the transmission content, the type of communication as well as the ability to combine the three. On the other hand, multimedia communication services can be classified as being local interactive or noninteractive , remote non-interactive or remote interactive and also as being for residential, business or mobile use.
The context in which multimedia services can be used is shown in Table1. Service usage conditions can be defined by their use, place, independence and degree of urgency. Services can be for private or business use.
The terminal and services are usually used in the office, the home, the car or a public place. Independence could be defined by the portability of the terminal and its independence of a given infrastructure as perceived by the user. The degree of independence varies from one type of terminal to another. On the other hand, the degree of urgency, from the user s point of view, determines whether the service should be provided in real time or an off-line service is sufficient.
A number of key requirements are common to the new multimedia services: Instant availability Real-time information transfer Service always on line.
Residential Mobile Business Local Remote non-interactive Remote interactive Enhanced telephones Leisure TV Videophones The Arts Home, shoping Teaching Broadcasting Games Games Remote consultation Video on demand Presentation Demonstration Multimedia presenation Training Database consulation Broadcasting Remote security Monitoring Teleinformation Teletraining Telesupervision Project management Contract negotiation Video meeting Videoconferencing Distance learning Project management Remote security Monitoring Remote diagnostic Users should be able to access their services from any terminal mobile point of delivery Whereas traditional voice services already have these characteristics, data services over the Internet including voice over data have typically been limited to basic bit transport, with no service guarantees, no guaranteed availability, and rather fragment service interruptions.
With new data service emerging, such as virtual private networks VPN and interconnection service between two network service providers, priorities in the data networking domain have to change. In order to resolve and build robust multimedia networks, it is natural that operators will seek to base their data networks on the proven service delivery capability currently deployed in leading-edge voice networks.
This will provide the flexibility, functionality and reliability required to meet the new demands of future users.
Also, it will enable operators to offer the sophisticated services currently provided for voice, in the multimedia domain.
Multimedia applications have several requirements with respect to the service offered to them by the communication system. These requirements depend on the type of the application and on its usage scenario. For instance, a nonconversational application for the retrieval of audio-visual data has different needs then a conversational application for live audio-visual communication i.
The usage scenario influences the criticality of the demands. From the network point of view, the most important requirements of multimedia communications are: High speed and changing bit rates Several virtual connections over the same access Synchronization of different information types Suitable standardizad services and supplementary service supporting multimedia applications The requirements of applications regarding the communications services can be divided into traffic and functional requirements.
The traffic requirements include transmission bandwidth delay and reliability. They depend on the used kind, number and quality of the data streams. The traffic requirements can be satisfied by the use of resource management mechanisms.
They establish a relationship between transmitted data and resources and ensure that the audio-visual data are transmitted in a timely manner. For this, during the transmission of data, the information about the resource needs must be available at all nodes participating in the distributed applications, i. Hence, resources must be reserved and state must be created in these nodes, which basically means that a connection is established. The functional requirements are multicast transmission and the ability to define coordinated sets of unidirectional streams.
Current fixed and mobile networks are built on mature architectures with strong traffic management, configuration capabilities, service platforms and well defined points of interconnection between the networks of different operators.
Multimedia Communication Systems: Techniques, Standards, and Networks
Gibson 1. Kazovsky, Giok-Djan Khoe, and M. Oskar van Deventer 2. Spanias Abstract 25 3. Hoffman and Khalid Sayood 5. Gibson 8.
The challenge of multimedia communications is to provide services that integrate text, sound, image and video information and to do it in a way that preserves the case of use and interactivity. A brief description of elements for multimedia systems is presented. User and network requirements are discussed together with pocket transfer concept. An overview of multimedia communication standards is given. The issues concerning multimedia digital subscriber lines are outlined together with multimedia over wireless, mobile and broadcasting networks as well as digital TV infrastructure for interactive multimedia services. Keywords: multimedia, standard, network, communication, system, user, requirement, asynchronous transfer mode, terminal, Internet, protocol I. Introduction The past years have seen an explosion in the use of digital media.
Innovations in multimedia technology have truly revolutionized communication, transforming the definitions of text, audio, and visual information through hybrid combinations of these forms. The rise of multimedia systems has generated new methods for high-speed data capturing, processing, editing, storage, and dissemination across wide networks, creating a need for high-level surveillance and quality-monitoring control schemes. Emerging Research on Networked Multimedia Communication Systems provides a comprehensive overview of the most current theoretical frameworks, technological developments, and empirical research findings in the field of electronic media. This timely reference work also investigates numerous issues related to multimedia sharing and optimization over heterogeneous wired and wireless networks, making it a relevant learning tool for scholars, practitioners, and educators in the multimedia research arena. This authoritative resource features a comprehensive collection of research-based articles on topics ranging from fundamental issues in multimedia optimization to breakthrough advancements in the deployment of multimedia systems, including group synchronization control, video coding, video transmission, video broadcasting, and discussions of recent developments in Quality of Experience QoE , Quality of Service QoS , and Video over IP VoIP services. Computer science, electrical engineering, information science, music technology, and education software are among the disciplines of contributors who present theoretical frameworks and empirical research findings regarding multimedia communication systems.
Multimedia Communication Systems: Techniques, Standards, and Networks K. R. Rao, Zoran S. Bojkovic, Dragorad A. Milovanovic ebook PDF download.
Multimedia Communication Systems: Techniques, Standards and Networks
Abstract: In this paper, it is outlined that multimedia - an integrated and interactive presentation of speech, audio, video, graphics and text, has become a major theme in todays information technology that merges the practices of communications, computing and information processing into an interdisciplinary fields. The challenge of multimedia communications is to provide services that integrate text, sound, image and video information and to do it in a way that preserves the case of use and interactivity. A brief description of elements for multimedia systems is presented. User and network requirements are discussed together with pocket transfer concept.
Rao, Zoran S. Bojkovic, Dragorad A. Milovanovic , an e-book, 10 publication, hundreds publications, and also a lot more. Milovanovic as well as getting the message of guides, after that finding the various other following book to review. It proceeds increasingly more.
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Multimedia Communication Systems: Techniques, Standards, Networks
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Not a MyNAP member yet? Register for a free account to start saving and receiving special member only perks. Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book. Basically, data networks are most efficient when implement as packet networks e. These requirements have been discussed in Section A. Thus, ITS multimedia communication network design must address several issues. Multimedia networks require the conversion of voice and video to digital information so that it can be combined win other data through multiplexing techniques for transfer between points within He network.
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