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  • Hu He, L Kondi
  • Canadian Conference on Electrical and Computer…
  • 2004
The MAP (maximum a posteriori) -based resolution enhancement technique with Huber-Markov random field (HMRF) as the image prior has been proposed in the literature, and better preserves image discontinuities when compared with a Gaussian prior model. The reconstruction relies on the choice of Huber function parameter, or threshold T. There is no explicit(More)
Multicarrier communication becomes a natural choice to transmit multimedia content at high data rates. Among multicarrier communication techniques, the combination of orthogonal frequency division multiplexing (OFDM) technology with multiple input multiple output (MIMO) systems is very effective for high data rate wireless communication. In this paper, we(More)
We optimize a wireless system for video transmission over orthogonal frequency division multiplexing (OFDM) systems. A frequency-selective Rayleigh fading channel is assumed. Block transmissions using a cyclic prefix are used to eliminate interblock interference (IBI). Quadrature amplitude modulation (QAM) is used as modulation scheme. The MPEG-4 video(More)
In this paper, the problem of joint shape and texture coding in video compression is considered. The shape is approximated using polygons or higher order curves. The texture is encoded using the shape adaptive discrete cosine transform (SA-DCT). The solution is optimal in the operational rate distortion sense i.e. given a coding setup, the solution will(More)
In this paper, we propose an optimal power allocation scheme for joint pilot placement and space frequency (SF) code design for multiple input multiple output orthogonal frequency division multiplexing (MIMO-OFDM) wireless channels. OFDM is combined with multiple antennas to increase data diversity gain on a time varying multipath fading channel, resulting(More)
The authors have examined the measure of the influence of the proportional and disproportional retardation on the results of the pre- and subnatal observation of the fetus and on the frequency of perinatal mortality and newborns' morbidity, premature birth and newborns born with low birth weight. The authors have stated the two types of retardation leads to(More)
In this work, we demonstrate the interference mitigation capabilities of the auxiliary vector (AV) receiver for scalable video transmission over direct-sequence code division multiple access (DS-CDMA) systems using a hardware testbed. The proposed receiver design is also compared to the conventional RAKE matched-filter (RAKE-MF) and minimum variance(More)
In this work, we propose a novel scheme to minimize drift in scalable wavelet based video coding, which gives a balanced performance between compression efficiency and quality. Our drift control mechanism maintains two frame buffers in the encoder and decoder; one for the base layer and the other for the enhancement layer. Drift control is achieved by(More)
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