Concept

High-definition video

Related publications (118)

UWB Signals as Shot Noises

We present a shot-noise based model for a large family of ultrawide bandwidth (UWB) signals. These include time-hopping and direct-sequence signaling with pulse position, interval and amplitude modulations. Each specific signal is constructed by adding fea ...

2005

Annoyance of Spatio-Temporal Artifacts in Segmentation Quality Assessment

Touradj Ebrahimi, Elisa Drelie Gelasca

This paper describes the results of a series of subjective experiments that investigated the annoyance caused by the most common artifacts present in segmented video sequences. Various types of artifacts were inserted into a reference segmented video consi ...

IEEE2004

Perceptual Prefiltering for Video Coding

Touradj Ebrahimi

Semantic segmentation is generally associated with second generation video coders, or object-based coders. Object-based coders encode different video objects separately in order to achieve lower bitrates and to enable object-based functionalities. In this ...

IEEE2004

Scalable Motion-Adaptive Video Coding with Redundant Representations

Pascal Frossard, Pierre Vandergheynst, Adel Rahmoune

This paper presents a scalable video coding scheme (MP3D), based on the use of a redundant 3-D spatio-temporal dictionary of functions. The spatial component of the dictionary consists of directional and anisotropically scaled functions, which form a rich ...

IEEE2004

A Localization/Verification Scheme for Finding Text in Images and Video Frames Based on Contrast Independent Features and Machine Learning Methods

Jean-Philippe Thiran, Jean-Marc Odobez, Datong Chen

Automatic character detection in video sequences is a complex task, due to the variety of sizes and colors as well as to the complexity of the background. In this paper we address this problem by proposing a localization/verification scheme. Candidate text ...

2004

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

Video Shot Clustering using Spectral Methods

Daniel Gatica-Perez, Jean-Marc Odobez

The automatic segmentation and structuring of videos present technical challenges due to the large variation of content, spatial layout, and possible lack of storyline. In this paper, we propose a spectral method to group video shots into scenes based on t ...

2003

A Localization/Verification Scheme for Finding Text in Images and Video Frames Based on Contrast Independent Features and Machine Learning Methods

Jean-Marc Odobez, Datong Chen

IDIAP2003

Spectral Structuring of Home Videos

Daniel Gatica-Perez, Jean-Marc Odobez

Accessing and organizing home videos present technical challenges due to their unrestricted content and lack of storyline. In this paper, we propose a spectral method to group video shots into scenes based on their visual similarity and temporal relations. ...

Springer Verlag2003

Video OCR for Sport Video Annotation and Retrieval

Hervé Bourlard, Datong Chen

This paper presents a video OCR system that automatically extracts closed captions from video frames as keywords (or as we called "cues") for building annotations of sport videos. In this system, text regions that contain closed captions are first identifi ...

2001

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