This paper presents some aspects related to the DVB (Digital Video Broadcasting) investigation. The basic aspects of DVB are presented, with an emphasis on DVB-T version of standard. The main purpose of this research is to analyze the way that the transmission of the transport streams is realized in case of the Terrestrial Digital Video Broadcasting (DVB-T). To accomplish this, first, Digital V...

This paper presents a study of packet data services over wireless connections in the context of Universal Mobile Telecommunication System (UMTS). To perform the study an emulator of the radio access part has been made which includes the mobile terminal and the UMTS Terrestrial Radio Network (UTRAN). The main features, the validation procedure and some results are contained.

TRANSMISSION ERRORS Robert Swann and Nick Kingsbury Cambridge University Engineering Department Trumpington Street, Cambridge CB2 1PZ. U.K. e-mail: [email protected] and [email protected] ABSTRACT This paper is concerned with the performance of MPEGII compressed video[1] when transmitted over noisy channels, such as for digital terrestrial television. We present the results of bit sensitivity...

An achievable rate region for line networks with edge and node capacity constraints and broadcast channels (BCs) is derived. The region is shown to be the capacity region if the BCs are orthogonal, deterministic, physically degraded, or packet erasure with one-bit feedback. If the BCs are physically degraded with additive Gaussian noise then independent Gaussian inputs achieve capacity.

It has long been known that, in the form of free ions, silver particles can be highly toxic to aquatic organisms. Yet to this day, there is a lack of detailed knowledge about the doses required to trigger a response and how the organisms deal with this kind of stress. To learn more about the cellular processes that occur in the cells, scientists from the Aquatic Research Institute, Eawag, subje...

This paper presents the results of a research study into blind and partially sighted peoples accessibility of broadcast television, drawing out implications for the design of iTV, in terms of the expectations and requirements for enhanced television viewing.

By having implemented digital terrestrial television (DTT) in Latin American countries and taking into account their ability to develop interactive services, new possibilities have been opened for improved connectivity in rural areas and those with difficult access by using applications that enable ubiquitous communication. In order to transfer the existing knowledge from Spain and Europe, the ...

The Internet has long outgrown its beginnings as a message system. It now hosts a multitude of video and audio applications. However, the current quality of real time delivery is insufficient for streaming media video. This paper examines what is needed to improve this quality to acceptable levels by considering the issues involved for the Internet to support broadcast television.

In this paper, we describe the design and implementation of a software video production switcher, vps, that improves the quality of MBone broadcasts. vps is modeled after the broadcast television industry's studio production switcher. It provides special e ects processing to incorporate audience discussions, add titles and other information, and integrate stored videos into the presentation. vp...