Papers by Vittoria Mignone
The first two generations of TV broadcasting are almost history, at least from the standardizatio... more The first two generations of TV broadcasting are almost history, at least from the standardization perspective. Analog and digital satellite distributions both have addressed mass markets. The next-generation TV systems are close to primetime deployments: HDTV, 3DTV, interactive services, hy- brid services, and additional innovations will dominate the next-generation TV. With the efficiency and maturity of DVB-S2, satellite distribution is a cost-efficient and well-established broadcast technology with significant potential for extensions. In this paper, the future perspectives of digital TV and HDTV broadcasting will be first explored, considering ongoing and future standardization activities that will be carried out. Particular attention to innovative solutions based on adaptive modulation and coding, source and channel coding, and error resilience techniques for satellite TV transmission is paid. In addition to broadcast TV, also the perspectives of hybrid and IPTV will be consid...
Bookmarks Related papers MentionsView impact
This article describes the results of laboratory tests carried out by RAI-CRIT in June 2006 on DV... more This article describes the results of laboratory tests carried out by RAI-CRIT in June 2006 on DVB-S2 state-of-the-art equipment. AWGN (Additive White Gaussian Noise) performance, non-linear-channel and phase-noise degradation were measured, and the results show that the equipment is in line with the simulation results reported in the DVB-S2 standard. Single-carrier and multi-carrier configurations were implemented and compared to the equivalent DVB-S configurations. The results show that DVB-S2 can offer excellent gains over DVB-S – in terms of not only capacity and/or performance, but also flexibility.
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
DVB-S2 is the second-generation specification for satellite broadcasting – developed by the DVB (... more DVB-S2 is the second-generation specification for satellite broadcasting – developed by the DVB (Digital Video Broadcasting) Project in 2003. It benefits from more recent developments in channel coding (LDPC codes) combined with a variety of modulation formats (QPSK, 8PSK, 16APSK and 32APSK). When used for interactive applications, such as Internet navigation, it may implement Adaptive Coding & Modulation (ACM), thus optimizing the transmission parameters for each individual user, dependant on path conditions. Backwards-compatible modes are available, allowing existing DVB-S set-top-boxes to continue working during any transitional period.
Bookmarks Related papers MentionsView impact
SMPTE Motion Imaging Journal, 2020
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Uer Revue Technique, 1998
En juillet 1997, le module technique du Projet DVB a constitue un groupe ad hoc, place sous la pr... more En juillet 1997, le module technique du Projet DVB a constitue un groupe ad hoc, place sous la presidence de la RAI et charge d'etudier les systemes numeriques de reportages d'actualites par satellite (DSNG). Le mandat confie a ce groupe est le suivant: (i) specifier le systeme de modulation/codage canal pour les DSNG et les autres applications de contribution par satellite; (ii) specifier les canaux de coordination auxiliaires ; (iii) collaborer avec les autres groupes du DVB en vue de definir les directives d'utilisation du codage de la source, les informations de service (IS) et l'embrouillage pour l'acces conditionnel (CA). Un systeme souple de DVB-DSNG [1] est maintenant defini, il est presente ici. S'appuyant essentiellement sur le systeme DVB de radiodiffusion par satellite (DVB-S), il offre toute une gamme de qualites d'image a divers debits, grâce aux algorithmes MP@ML et 422P@ML du MPEG-2. Le groupe a termine la specification des canaux de coordination auxiliaires [2] a l'automne 1998. La procedure d'approbation est encore en cours au sein du DVB et de l'ETSI. Cette specification n 'est pas traitee dans cet article pour rester concis.
Bookmarks Related papers MentionsView impact
International Journal of Satellite Communications and Networking, 2015
Bookmarks Related papers MentionsView impact
International Journal of Satellite Communications and Networking, 2015
Summary The second-generation specification of the digital video broadcasting for satellite (DVB-... more Summary The second-generation specification of the digital video broadcasting for satellite (DVB-S2) was developed in 2003 with the aim of improving the existent broadcasting standard DVB-S. The main new features introduced by DVB-S2 included increased baud rates, higher cardinality constellations (up to 32 points), and more efficient binary codes. The extension to DVB-S2, approved in 2014 with the name DVB-S2X, together with continuous technological evolution, moves further steps in this direction, with the use of constellations with cardinality up to 256 points, improved granularity of modulation and coding schemes, and the possibility to increase the baud rate. In this scenario, it is important to be able to ascertain what is the best transceiver structure, starting from the choice of the shaping pulse and the baud rate of the transmitted signals and ending with the most promising receiver architectures, with the aim of maximizing the spectral efficiency. In this paper, we will discuss some of the aspects of this investigation, namely, the optimization of transmission parameters and the description of an efficient receiver. We will then assess the performance of the proposed scheme in comparison with a classical DVB-S2 architecture. Some synchronization aspects will also be discussed, to account for the impairments introduced by the channel. Copyright © 2015 John Wiley & Sons, Ltd.
Bookmarks Related papers MentionsView impact
International Broadcasting Conference IBC '95, 1995
ABSTRACT The paper describes a novel channel estimation scheme (identified as CD3, coded decision... more ABSTRACT The paper describes a novel channel estimation scheme (identified as CD3, coded decision directed demodulation) for coherent demodulation of OFDM (orthogonal frequency division multiplex) signals making use of any constellation format (e.g. QPSK, 16 QAM, 64 QAM). The structure of the CD3-OFDM demodulator is described, based on a new channel estimation loop exploiting the error correction capability of a forward error correction (FEC) decoder and frequency and time domain filtering to mitigate the effects of noise and residual errors. In contrast to the conventional coherent OFDM demodulation schemes, CD3-OFDM does not require the transmission of a comb of pilot tones for channel estimation and equalisation, therefore yielding a significant improvement in spectrum efficiency (typically between 5% and 15%). The performance of the system with QPSK and 64 QAM modulations is analysed by computer simulations, on AWGN and frequency selective channels. The results indicate that CD3-OFDM allows to achieve C/N performance similar to coherent demodulation with pilot tones, when the same channel coding and modulation scheme is adopted. Otherwise, when the additional capacity is exploited to increase the FEC redundancy instead of the useful bit-rate, CD3 can offer significant C/N advantages (typically from 2 to 5 dB depending on the channel characteristics). Therefore CD3-OFDM can be suitable for digital television broadcasting services over selective radio channels
Bookmarks Related papers MentionsView impact
2014 7th Advanced Satellite Multimedia Systems Conference and the 13th Signal Processing for Space Communications Workshop (ASMS/SPSC), 2014
Bookmarks Related papers MentionsView impact
International Broadcasting Conference (IBC), 1997
... AN ADVANCED ALGORITHM FOR IMPROVING DVB-T COVERAGE IN SFN V. Mignone, A. Morello, M. Visintin... more ... AN ADVANCED ALGORITHM FOR IMPROVING DVB-T COVERAGE IN SFN V. Mignone, A. Morello, M. Visintin ... This model is used to evaluate, by means of Monte Carlo computer simulations, the coverage probability achievable by fixed and portable receivers in a regular SFN. ...
Bookmarks Related papers MentionsView impact
Broadband Wireless Communications, 1998
In the framework of the DVB, RACE dTTb and ACTS VALIDATE European projects, the RAI Research Cent... more In the framework of the DVB, RACE dTTb and ACTS VALIDATE European projects, the RAI Research Centre has directly contributed to the definition and validation of the DVB system for digital terrestrial television broadcasting (DVB-T). The system, allowing fixed and portable reception, is based on OFDM technique with a variety of modulation/channel coding configurations, and is characterised by two operational modes: with 2K carriers for conventional multi-frequency networks (MFN), and with 8K carriers to cover also single frequency networks (SFN).
Bookmarks Related papers MentionsView impact
IEEE Transactions on Communications, 1996
Bookmarks Related papers MentionsView impact
IEEE Transactions on Broadcasting, 2009
Bookmarks Related papers MentionsView impact
International Journal of Satellite Communications and Networking, 2004
Bookmarks Related papers MentionsView impact
31st AIAA International Communications Satellite Systems Conference, 2013
Bookmarks Related papers MentionsView impact
IEEE Transactions on Broadcasting, 2014
Bookmarks Related papers MentionsView impact
Uploads
Papers by Vittoria Mignone