The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Hynek Hermansky - One of the best experts on this subject based on the ideXlab platform.
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Effect of Filter Bandwidth and spectral sampling rate of analysis Filterbank on automatic phoneme recognition
2013 IEEE International Conference on Acoustics Speech and Signal Processing, 2013Co-Authors: Feipeng Li, Hynek HermanskyAbstract:In this study we investigate the effect of Filter Bandwidth and spectral sampling rate of analysis Filterbank for speech recognition. Two experiments are conducted to evaluate the performance of an automatic phoneme recognition system on clean speech and speech in noise as the Filter Bandwidth increases from 0.5 to 3.5 ERB and the spectral resolution changes from 1, 1.5, 2, 3, 4, to 6 samples per Bark. Results indicate that the optimum Filter Bandwidth varies for different speech sounds at different frequency ranges. A spectral sampling of 4 Filters per Bark with the Filter Bandwidth being ≈ 1 ERB produces the best performance on average.
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ICASSP - Effect of Filter Bandwidth and spectral sampling rate of analysis Filterbank on automatic phoneme recognition
2013 IEEE International Conference on Acoustics Speech and Signal Processing, 2013Co-Authors: Hynek HermanskyAbstract:In this study we investigate the effect of Filter Bandwidth and spectral sampling rate of analysis Filterbank for speech recognition. Two experiments are conducted to evaluate the performance of an automatic phoneme recognition system on clean speech and speech in noise as the Filter Bandwidth increases from 0.5 to 3.5 ERB and the spectral resolution changes from 1, 1.5, 2, 3, 4, to 6 samples per Bark. Results indicate that the optimum Filter Bandwidth varies for different speech sounds at different frequency ranges. A spectral sampling of 4 Filters per Bark with the Filter Bandwidth being ≈ 1 ERB produces the best performance on average.
Jichai Jeong - One of the best experts on this subject based on the ideXlab platform.
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transmission performance of 10 gb s optical duobinary transmission systems considering adjustable chirp of nonideal linbo sub 3 mach zehnder modulators due to applied voltage ratio and Filter Bandwidth
Journal of Lightwave Technology, 2001Co-Authors: Sung Kee Kim, Jaehoon Lee, Jichai JeongAbstract:We investigate interplay between the residual and applied chirp of optical duobinary modulated signals in order to improve transmission performance. To find the best performance for 10-Gb/s optical duobinary transmission systems, we consider the residual chirp accompanying from the finite extinction ratio, the applied chirp adjusted by the applied voltage ratio (the chirp parameter) between two electrodes of LiNbO/sub 3/ modulators, and the Bandwidth of electrical low-pass Filters used in duobinary transmitters. The simulation results suggest that nearly zero chirp during the mark ('1') period and large peak chirp at the middle of the space ('0') provide the best transmission performance. This zero chirp around marks and high peak chirp at the middle of each space can be controlled by the applied voltage ratio between two electrodes of modulator and the Filter Bandwidth, respectively.
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Transmission performance of 10-Gb/s optical duobinary transmission systems considering adjustable chirp of nonideal LiNbO/sub 3/ Mach-Zehnder modulators due to applied voltage ratio and Filter Bandwidth
Journal of Lightwave Technology, 2001Co-Authors: Sung Kee Kim, Jaehoon Lee, Jichai JeongAbstract:We investigate interplay between the residual and applied chirp of optical duobinary modulated signals in order to improve transmission performance. To find the best performance for 10-Gb/s optical duobinary transmission systems, we consider the residual chirp accompanying from the finite extinction ratio, the applied chirp adjusted by the applied voltage ratio (the chirp parameter) between two electrodes of LiNbO/sub 3/ modulators, and the Bandwidth of electrical low-pass Filters used in duobinary transmitters. The simulation results suggest that nearly zero chirp during the mark ('1') period and large peak chirp at the middle of the space ('0') provide the best transmission performance. This zero chirp around marks and high peak chirp at the middle of each space can be controlled by the applied voltage ratio between two electrodes of modulator and the Filter Bandwidth, respectively.
Sung Kee Kim - One of the best experts on this subject based on the ideXlab platform.
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transmission performance of 10 gb s optical duobinary transmission systems considering adjustable chirp of nonideal linbo sub 3 mach zehnder modulators due to applied voltage ratio and Filter Bandwidth
Journal of Lightwave Technology, 2001Co-Authors: Sung Kee Kim, Jaehoon Lee, Jichai JeongAbstract:We investigate interplay between the residual and applied chirp of optical duobinary modulated signals in order to improve transmission performance. To find the best performance for 10-Gb/s optical duobinary transmission systems, we consider the residual chirp accompanying from the finite extinction ratio, the applied chirp adjusted by the applied voltage ratio (the chirp parameter) between two electrodes of LiNbO/sub 3/ modulators, and the Bandwidth of electrical low-pass Filters used in duobinary transmitters. The simulation results suggest that nearly zero chirp during the mark ('1') period and large peak chirp at the middle of the space ('0') provide the best transmission performance. This zero chirp around marks and high peak chirp at the middle of each space can be controlled by the applied voltage ratio between two electrodes of modulator and the Filter Bandwidth, respectively.
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Transmission performance of 10-Gb/s optical duobinary transmission systems considering adjustable chirp of nonideal LiNbO/sub 3/ Mach-Zehnder modulators due to applied voltage ratio and Filter Bandwidth
Journal of Lightwave Technology, 2001Co-Authors: Sung Kee Kim, Jaehoon Lee, Jichai JeongAbstract:We investigate interplay between the residual and applied chirp of optical duobinary modulated signals in order to improve transmission performance. To find the best performance for 10-Gb/s optical duobinary transmission systems, we consider the residual chirp accompanying from the finite extinction ratio, the applied chirp adjusted by the applied voltage ratio (the chirp parameter) between two electrodes of LiNbO/sub 3/ modulators, and the Bandwidth of electrical low-pass Filters used in duobinary transmitters. The simulation results suggest that nearly zero chirp during the mark ('1') period and large peak chirp at the middle of the space ('0') provide the best transmission performance. This zero chirp around marks and high peak chirp at the middle of each space can be controlled by the applied voltage ratio between two electrodes of modulator and the Filter Bandwidth, respectively.
S A Jabar - One of the best experts on this subject based on the ideXlab platform.
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minimization of amplified spontaneous emission noise in upstream superpon 512 onu 10 gbit s
Wireless and Optical Communications Networks, 2005Co-Authors: S A Jabar, Mohammad Yousif Jamro, John MAbstract:We demonstrated the effect of presenting optical band pass Filter for point to multipoint architecture such SuperPON. The position of optical Filter and the range of optical Filter Bandwidth to minimise amplified spontaneous emission noise for upstream SuperPON with 512 ONU at transmission speed of 10 Gbit/s is explored.
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Minimization of amplified spontaneous emission noise in upstream SuperPON 512 ONU, 10 Gbit/s
Second IFIP International Conference on Wireless and Optical Communications Networks 2005. WOCN 2005., 1Co-Authors: S A Jabar, Mohammad Yousif Jamro, John M. SeniorAbstract:We demonstrated the effect of presenting optical band pass Filter for point to multipoint architecture such SuperPON. The position of optical Filter and the range of optical Filter Bandwidth to minimise amplified spontaneous emission noise for upstream SuperPON with 512 ONU at transmission speed of 10 Gbit/s is explored.
Jaehoon Lee - One of the best experts on this subject based on the ideXlab platform.
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transmission performance of 10 gb s optical duobinary transmission systems considering adjustable chirp of nonideal linbo sub 3 mach zehnder modulators due to applied voltage ratio and Filter Bandwidth
Journal of Lightwave Technology, 2001Co-Authors: Sung Kee Kim, Jaehoon Lee, Jichai JeongAbstract:We investigate interplay between the residual and applied chirp of optical duobinary modulated signals in order to improve transmission performance. To find the best performance for 10-Gb/s optical duobinary transmission systems, we consider the residual chirp accompanying from the finite extinction ratio, the applied chirp adjusted by the applied voltage ratio (the chirp parameter) between two electrodes of LiNbO/sub 3/ modulators, and the Bandwidth of electrical low-pass Filters used in duobinary transmitters. The simulation results suggest that nearly zero chirp during the mark ('1') period and large peak chirp at the middle of the space ('0') provide the best transmission performance. This zero chirp around marks and high peak chirp at the middle of each space can be controlled by the applied voltage ratio between two electrodes of modulator and the Filter Bandwidth, respectively.
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Transmission performance of 10-Gb/s optical duobinary transmission systems considering adjustable chirp of nonideal LiNbO/sub 3/ Mach-Zehnder modulators due to applied voltage ratio and Filter Bandwidth
Journal of Lightwave Technology, 2001Co-Authors: Sung Kee Kim, Jaehoon Lee, Jichai JeongAbstract:We investigate interplay between the residual and applied chirp of optical duobinary modulated signals in order to improve transmission performance. To find the best performance for 10-Gb/s optical duobinary transmission systems, we consider the residual chirp accompanying from the finite extinction ratio, the applied chirp adjusted by the applied voltage ratio (the chirp parameter) between two electrodes of LiNbO/sub 3/ modulators, and the Bandwidth of electrical low-pass Filters used in duobinary transmitters. The simulation results suggest that nearly zero chirp during the mark ('1') period and large peak chirp at the middle of the space ('0') provide the best transmission performance. This zero chirp around marks and high peak chirp at the middle of each space can be controlled by the applied voltage ratio between two electrodes of modulator and the Filter Bandwidth, respectively.