In this paper, the FH-OFDM (fast hopping OFDM) design and its associated packet-awareness channel coder are presented for wireless multimedia. In addition, the effectiveness of the coder over Markov channel model is studied. The simulations show that these proposed techniques can achieve significant performance gains.

This paper presents a new structure for a low bit rate video coder. The new structure uses quadtree decomposition for motion estimation and compensation. This significantly reduces the computational complexity of the coding operation. The new coding scheme yields high subjective quality at bit rates compatible with RDSI channels. Simulations results demonstrate the effectiveness of the new coder.

Problem statement: In low-bit-rate speech communication, speech coding deteriorates the characteristics of the coded speech significantly. An important feature of the speech is the fundamental frequency contour which determines the pitch information of the speech. It has been known that pitch information is one of the core parameter of the multi-pulse based code excited linear prediction (MPCEL...

BACKGROUND Administrative data are widely used to study health systems and make important health policy decisions. Yet little is known about the influence of coder characteristics on administrative data validity in these studies. Our goal was to describe the relationship between several measures of validity in coded hospital discharge data and 1) coders' volume of coding (> or = 13,000 vs. <13,...

We design an edge adaptive predictor for lossless image coding. The predictor adaptively weights four directional predictor together with an adaptive linear predictor based on information from neighbouring pixels. Although conceptually simple, the performance of the resulting coder is comparable to state of the art image coders when a simple context based coder is used to encode the prediction ...

• Sharing attention is challenging for infants with visual impairment (VI). measures assume normal vision limiting research in VI. A novel measure tailored to VI obtained good inter-coder reliability. Infants VI, who have enough residual vision, use gaze share others. The lower an infant’s acuity, the his/her ability attention. In Coordinated Joint Engagement (CJE), children acknowledge that th...

Abstract Background High-density lipoprotein (HDL) cholesterol levels are inversely associated with cardiovascular risk (CVR). However, HDL is not a homogeneous lipid and can be subdivided into subfractions, which uniformly CVR. Among Roma populations, the prevalence of reduced and, consequently, that diseases very high. it known how this reduction affects different subfractions whether changes...

RATIONALE CSL112, human apolipoprotein A-I (apoA-I) reconstituted with phosphatidylcholine, is known to cause a dramatic rise in small high-density lipoprotein (HDL). OBJECTIVE To explore the mechanisms by which the formation of small HDL particles is induced by CSL112. METHODS AND RESULTS Infusion of CSL112 into humans caused elevation of 2 small diameter HDL fractions and 1 large diameter...

This paper analyses two narrowband speech codecs, the 4.8 kbit/s FS1016 coder and the 8 kbit/s G729 coder, using objective psychoacoustic measures. Four measures are used: loudness, sharpness, roughness and tonality. The results show sharpness and roughness as the two major contributing factors to the subjective difference between the two coders.