Prospects for Internet technology

This paper surveys the current developments in Internet technology, with a particular emphasis on performance, and the growing need for various guarantees of quality of service. It discusses hardware technologies for increased bandwidth, mechanisms for requesting and providing specific qualities of service, and various scaling issues. Fi-nally it discusses mechanisms needed for (but not the economics of) the Internet in the mass market. To this end, we survey changes in the areas of addressing, and flow management. 1

Distributed multimedia systems

A distributed multimedia system (DMS) is an integrated communication, computing, and information system that enables the processing, management, delivery, and presentation of synchronized multimedia information with quality-of-service guarantees. Multimedia information may include discrete media data, such as text, data, and images, and continuous media data, such as video and audio. Such a system enhances human communications by exploiting both visual and aural senses and provides the ultimate flexibility in work and entertainment, allowing one to collaborate with remote participants, view movies on demand, access on-line digital libraries from the desktop, and so forth. In this paper, we present a technical survey of a DMS. We give an overview of distributed multimedia systems, examine the fundamental concept of digital media, identify the applications, and survey the important enabling technologies.published_or_final_versio

Combined Source and Channel Strategies for Optimized Video Communications

ISBN 978-953-7619-70-

Asymmetrical digital subscriber line (ADSL) an in-depth study

Asymmetrical Digital Subscriber Line (ADSL) is one member of a group of broadband access technologies that uses the existing copper-based local loop of the analog PSTN for high-speed digital data transmission. One feature of ADSL is that it permits analog voice POTS transmissions to continue uninterrupted over the same wiring. Specifically, POTS continues to use the 0 to 4 KHz frequency range of the copper wiring, while ADSL uses bandwidth starting at 25 KHz and extending up to approximately 1.1 MHz for data transmission. The term asymmetrical refers to the fact that data rates downstream (to the user) and upstream (from the user) are not the same. Typical ADSL data rates range from 1.536 to 6.144 Mbps downstream and from 16 to 640 Kbps upstream. Local loop length, wire size, and the presence of devices to improve voice communication such as bridged taps and loading coils all affect ADSL data rates. Digital data is coded by one of two methods: Discrete Multitone Modulation (DMT) or Carrierless Amplitude and Phase Modulation (CAP). Echo control is also accomplished by one of two methods: Frequency Division Multiplexing (FDM) or echo cancellation. This paper consists of four sections: 1) A technical review and comparison of the CAP and DMT line encoding technologies. 2) A market review of the presence of CAP and DMT technologies in customer premise equipment (CPE) such as modems and routers. 3) A review of the POTS physical layer that exists between the ADSL subscriber and the Telco CO, and its impact on ADSL availability and quality of service (QOS). 4) A technical review of the newer, splitterless, G.Lite technolog

Architecture and Features of IPTV Network

IPTV mreža novi je sustav pružanja televizijskih, video, audio, podatkovnih i drugih interaktivnih usluga putem mreža temeljenih na Internet Protokolu (IP). Može biti izvedena implementacijom različitih širokopojasnih pristupnih tehnologija, upotrebom postojećih bakrenih parica, optičkim pristupnim tehnologijama ili bežičnim radijskim pristupom. Prijenos video sadržaja temeljna je IPTV usluga, zbog čega je nužno razumijevanje osnovnih parametara o kojima ovisi kvaliteta sadržaja, kao i razumijevanje tehnika kompresije kao neophodnog procesa obrade video signala. Prijenos sadržaja IP mrežom započinje formiranjem transportnog toka i enkapsulacijom podataka, a ovisi o mnoštvu protokola. Cilj ovoga rada pružiti je uvid u sastavne dijelove složene IPTV arhitekture, kao i pojedine značajke neophodne za osiguravanje isporuke usluga.IPTV provides interactive multimedia services, including television, video, audio and data through the use of Internet Protocol based networks. It can be implemented by using various broadband access technologies – via wireless radio access, over a fiber access network or by utilizing existing twisted pair cabling. Because video streaming is a core IPTV service, it is important to understand the basic video parameters that quality depends on, as well as compression techniques as a necessary component of video signal processing. The proces of content transmission via IP networks begins by forming a transport stream and encapsulating the data, and it is dependent upon multiple communication protocols. The purpose of this paper is to provide insight into the main components of complex IPTV architecture, as well as the features required to ensure the delivery of services

Architecture and Features of IPTV Network

IPTV mreža novi je sustav pružanja televizijskih, video, audio, podatkovnih i drugih interaktivnih usluga putem mreža temeljenih na Internet Protokolu (IP). Može biti izvedena implementacijom različitih širokopojasnih pristupnih tehnologija, upotrebom postojećih bakrenih parica, optičkim pristupnim tehnologijama ili bežičnim radijskim pristupom. Prijenos video sadržaja temeljna je IPTV usluga, zbog čega je nužno razumijevanje osnovnih parametara o kojima ovisi kvaliteta sadržaja, kao i razumijevanje tehnika kompresije kao neophodnog procesa obrade video signala. Prijenos sadržaja IP mrežom započinje formiranjem transportnog toka i enkapsulacijom podataka, a ovisi o mnoštvu protokola. Cilj ovoga rada pružiti je uvid u sastavne dijelove složene IPTV arhitekture, kao i pojedine značajke neophodne za osiguravanje isporuke usluga.IPTV provides interactive multimedia services, including television, video, audio and data through the use of Internet Protocol based networks. It can be implemented by using various broadband access technologies – via wireless radio access, over a fiber access network or by utilizing existing twisted pair cabling. Because video streaming is a core IPTV service, it is important to understand the basic video parameters that quality depends on, as well as compression techniques as a necessary component of video signal processing. The proces of content transmission via IP networks begins by forming a transport stream and encapsulating the data, and it is dependent upon multiple communication protocols. The purpose of this paper is to provide insight into the main components of complex IPTV architecture, as well as the features required to ensure the delivery of services

Architecture and Features of IPTV Network

IPTV mreža novi je sustav pružanja televizijskih, video, audio, podatkovnih i drugih interaktivnih usluga putem mreža temeljenih na Internet Protokolu (IP). Može biti izvedena implementacijom različitih širokopojasnih pristupnih tehnologija, upotrebom postojećih bakrenih parica, optičkim pristupnim tehnologijama ili bežičnim radijskim pristupom. Prijenos video sadržaja temeljna je IPTV usluga, zbog čega je nužno razumijevanje osnovnih parametara o kojima ovisi kvaliteta sadržaja, kao i razumijevanje tehnika kompresije kao neophodnog procesa obrade video signala. Prijenos sadržaja IP mrežom započinje formiranjem transportnog toka i enkapsulacijom podataka, a ovisi o mnoštvu protokola. Cilj ovoga rada pružiti je uvid u sastavne dijelove složene IPTV arhitekture, kao i pojedine značajke neophodne za osiguravanje isporuke usluga.IPTV provides interactive multimedia services, including television, video, audio and data through the use of Internet Protocol based networks. It can be implemented by using various broadband access technologies – via wireless radio access, over a fiber access network or by utilizing existing twisted pair cabling. Because video streaming is a core IPTV service, it is important to understand the basic video parameters that quality depends on, as well as compression techniques as a necessary component of video signal processing. The proces of content transmission via IP networks begins by forming a transport stream and encapsulating the data, and it is dependent upon multiple communication protocols. The purpose of this paper is to provide insight into the main components of complex IPTV architecture, as well as the features required to ensure the delivery of services

Audio quality and capacity issues in network design

Data networks are an integral part of the professional audio environment. The emphasis in audio networking is moving towards the real-time transfer of audio data. This requires the timely and reliable delivery of audio data. This paper examines a number of quality and capacity issues surrounding the transfer of high quality audio data in real-time over data networks. Areas such as noise, jitter and other types of errors are examined in relation to audio transfer. The paper also includes an overview of the hearing process, compression schemes and a review of perceptual encoding techniques. Important network tools such as Quality of Service and Error Correction are also examined in the context of transferring audio data