Concept

Ultra-high-definition television

Related publications (72)

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On the baseband compensation of IQ imbalances in OFDM systems

Ali H. Sayed

OFDM is a widely recognized and standardized modulation scheme for future high bit rate communications. Implementation of OFDM-based systems suffers from inphase-quadrature phase (IQ) imbalances in the front-end analog processing. The IQ imbalances can sev ...

2004

Ion cyclotron range of frequencies mode conversion electron heating in deuterium-hydrogen plasmas in the Alcator C-Mod tokamak

Yu Lin

Localized direct electron heating (EH) by mode-converted (MC) ion cyclotron range of frequencies (ICRF) waves in D(H) tokamak plasmas has been clearly observed for the first time in Alcator C-Mod. Both on- and off-axis (high field side) mode conversion EH ...

2003

Video Multicast in (large) local area networks

Martin Vetterli, Jean-Paul Wagner

We consider the problem of distributing high-quality video signals over IP multicast in large Local Area Networks (LANs), under real-time delay constraints, and with software-only processing. In a large LAN (such as the network of a university campus, or t ...

2002

Ajustement passif des embases MilliNewton

Thomas Maeder

Sérigraphie et ajustement passif de la 2e série des embases des capteurs MilliNewton, version 2, variante DT400. La 2e série d'embases MilliNewton, version 2, a été produite avec des masques 325 mesh / 30 μm, au lieu des 325 mesh / 40 μm usuels, donnant de ...

EPFL2001

InGaN/GaN quantum wells grown by molecular beam epitaxy emitting at 300 K in the whole visible spectrum

Nicolas Grandjean

InGaN/GaN single quantum wells (SQWs) are grown by molecular beam epitaxy using ammonia as a nitrogen precursor. The InGaN material quality is optimized through the photoluminescence (PL) properties. It is found that the growth temperature is critical for ...

2001

User-Oriented QoS Analysis in MPEG-2 Video Delivery

Pascal Frossard

We address the problem of video quality prediction and control for high-resolution video transmitted over lossy packet networks. In packet video, the bitstream flows through several subsystems (coder, network, decoder); each of them can impair the informat ...

1999

Coherent processing of character skeletal forms

Roger Hersch

It is well known that in the general context the similarity relation is very fuzzy and hard to define. Unfortunately, the intuitive notion of similarity is not a transitive relation: knowing that A is similar to B and that B is similar to C does not necess ...

Elsevier1997

Present status of the ultrabright synchrotron sources

Giorgio Margaritondo

In the mid-1980s, the concept emerged of a new (third) generation of synchrotron light sources, characterized by unprecedented levels of brightness-and marking a clear departure from the performances of traditional X-ray sources. This project became realit ...

1997

Multiresolution broadcast for digital HDTV using joint source-channel coding

Martin Vetterli

The use of multiresolution (MR) joint source-channel coding in the context of digital terrestrial broadcasting of high-definition television (HDTV) is shown to be an efficient alternative to single-resolution techniques, which suffer from a sharp threshold ...

1993

Combined multiresolution source coding and modulation for digital broadcast of HDTV

Martin Vetterli

A practical end-to-end all-digital multiresolution system is demonstrated that employs joint source-channel coding and modulation in order to achieve efficient broadcast of digital HDTV. The threshold effect plaguing single resolution systems is softened b ...

1992