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...

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...

In this paper, we proposed a temporal error concealment (EC) using recursive boundary matching method. The proposed recursive boundary matching method improves the spatial correlation of the macroblocks (MBs) by reusing the pixels of the concealed MB and control weighting factor of the concealed MB recursively. And proposed algorithm has both forward concealment and backward concealment to prev...

Due to complexity and delay constraints a usually significant amount of residual redundancy remains in the source samples after source coding. This residual redundancy can be exploited by iterative source-channel decoding for error concealment and quality improvements. One key design issue in joint source-channel (de-)coding is the index assignment. Besides conventional index assignments optimi...

In the context of block-based video coding, two error concealment algorithms are presented. The first algorithm is based on bilinear motion field interpolation (BMFI). For each pel in a damaged block, the algorithm recovers a motion vector using bilinear interpolation of neighbouring motion vectors. This vector is then used to conceal the damaged pel. A reduced complexity version of this algori...

OBJECTIVE To determine if adequacy of randomisation and allocation concealment is associated with changes in effect sizes (ES) when comparing physical therapy (PT) trials with and without these methodological characteristics. DESIGN Meta-epidemiological study. PARTICIPANTS A random sample of randomised controlled trials (RCTs) included in meta-analyses in the PT discipline were identified. ...