نتایج جستجو برای: zone of concealment
تعداد نتایج: 21173899 فیلتر نتایج به سال:
Transmission of a compressed video signal over a lossy communication network exposes the information to losses and errors, which leads to significant visible errors in the reconstructed frames at the decoder side. In this paper we present a new hybrid error concealment algorithm for compressed video sequences, based on temporal and spatial concealment methods. We describe spatial and temporal t...
OBJECTIVES Despite the rapid expansion of the antiaging cosmetic industry in recent years, little is known about the current social judgment consequences of concealing one's age. In two studies, we examined perceivers' evaluations and mental representations of individuals who engage in age concealment. METHODS In Study 1, we assessed young and older adults' reactions toward a middle-aged or o...
Beliefs About Parents’ Right to Know: Domain Differences and Associations With Change in Concealment
Parent and adolescent (M = 15.7 years) beliefs regarding parents’ right to know (RTK) about adolescents’ activities were examined in 174 middle-class U.S. families. Mean differences and associations with latent changes in teens’ concealment were assessed. RTK was greatest about risky prudential activities, least for personal activities for parents and romantic activities for teens, and higher f...
The new high efficiency video coding standard (HEVC) includes structures and tools that were not available in previous standards. The macrobock concept was replaced by a quad-tree structure that includes: coding units, prediction units and transform units; also, new parallelization tools are now available. Video transmissions over error prone environments have the need of reliable and efficient...
Introduction: Previous studies have indicated a relationship between MPTP pore and AV nodal rate-dependent properties. The aim of present study was to determine acute direct effects of cyclosporine on extracellular field potential of isolated rabbit AV node during experimental atrial fibrillation. Methods: In one group of male New Zealand rabbits (1.5-2.5 kg) cumulative concentrations of cyc...
Data hiding in video is an important research issue as the traditional methods are error prone and leads to distortion. However, most of the video data hiding methods utilize uncompressed video data. Recent video data hiding techniques are focused on the characteristics generated by video compressing standards. A new blind data hiding method is proposed based on a novel concept of forbidden zon...
Introduction: The present study is aimed to evaluate electrophysiological remodeling of atrioventricular (AV) node and ventricular conduction during experimental atrial fibrillation (AF) model in isolated heart of cirrhotic rats. Methods: Cirrhosis-induced electrophysiological remodeling was evaluated in 24 isolated retrogradely perfused rat hearts in 2 groups (control and cirrhotic). Cirrho...
Introduction: Endorphins are produced by cardiomyocytes, and exert different effects on the heart. The aim of the present study is to assess morphine effects on extracellular atrioventricular (AV) node field potential pattern and ventricular rhythm of isolated rabbit heart during experimental atrial fibrillation (AF). Methods: Effects of different concentrations of morphine (10, 20, 50 and 1...
A study on the use of vector rational interpolation for the estimation of lost or erroneously received motion vectors of MPEG-2 coded video bitstreams for error concealment purposes is reported. Four different nonlinear interpolation schemes are examined. They are capable of adapting their behaviour to neighbouring motion information. Simulation results prove the success of their application to...
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