Rozprawy doktorskie na temat „Random noise theory”
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Arrowood, Jon A. "Using observation uncertainty for robust speech recognition". Diss., Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04082004-180005/unrestricted/arrowood%5Fjon%5Fa%5F200312%5Fphd.pdf.
Pełny tekst źródłaBreen, Barbara J. "Computational nonlinear dynamics monostable stochastic resonance and a bursting neuron model /". Diss., Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04082004-180036/unrestricted/breen%5Fbarbara%5Fj%5F200312%5Fphd.pdf.
Pełny tekst źródłaFurbeck, David S. "Fast determination of bit error rates on impulsive noise channels". Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/15656.
Pełny tekst źródłaKowalske, Kyle. "Performance of coherent and noncoherent RAKE receivers with convolutional coding ricean fading and pulse-noise interference /". Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Jun%5FKowalske.pdf.
Pełny tekst źródłaThesis advisor(s): Clark Robertson. Includes bibliographical references (p. 85-87). Also available online.
Kwan, Jonathan Carleton University Dissertation Engineering Electrical. "Noise analysis and simulation of switched-capacitor circuits using a continuous time circuit simulator". Ottawa, 1988.
Znajdź pełny tekst źródłaCrnkovich, Joseph G. "Efficacy of various waveforms to support geolocation". Thesis, Monterey, Calif. : Naval Postgraduate School, 2009. http://handle.dtic.mil/100.2/ADA501141.
Pełny tekst źródłaThesis Advisor(s): Kragh, Frank ; Loomis, Herschel H. "June 2009." Description based on title screen as viewed on July 10, 2009. DTIC Identifiers: Theses, geolocation, cross ambiguity function, matched filter detection. Author(s) subject terms: Geolocation, Cross Ambiguity Function, CAF, Matched Filter Detection. Includes bibliographical references (p. 155-157). Also available in print.
Zhu, Ying. "Signal detection on two-dimensional intersymbol interference channels correlated sources and reduced complexity algorithms /". [Pullman, Wash.] : Washington State University, 2008. http://www.dissertations.wsu.edu/Dissertations/Fall2008/y_zhu_081408.pdf.
Pełny tekst źródłaTitle from PDF title page (viewed on Sept. 23, 2008) "School of Electrical Engineering and Computer Science." Includes bibliographical references (p. 83-90).
Ni, Li. "Non-equiprobable multi-level coding for the additive white Gaussian noise channel with Tikhonov phase error". Online access for everyone, 2005. http://www.dissertations.wsu.edu/Dissertations/Fall2005/l%5Fni%5F120905.pdf.
Pełny tekst źródłaAnilkumar, A. K. "Application Of Controlled Random Search Optimization Technique In MMLE With Process Noise". Thesis, Indian Institute of Science, 2000. https://etd.iisc.ac.in/handle/2005/232.
Pełny tekst źródłaAnilkumar, A. K. "Application Of Controlled Random Search Optimization Technique In MMLE With Process Noise". Thesis, Indian Institute of Science, 2000. http://hdl.handle.net/2005/232.
Pełny tekst źródłaKellett, Daniel. "Random Sequence Encoding with OFDM for Covert Communication and Signal Reuse for LPI/LPD Radar: Theory & Experiments". Miami University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=miami1501120348908255.
Pełny tekst źródłaKowalske, Kyle E. "Performance of coherent and noncoherent RAKE receivers with convolutional coding ricean fading and pulse-noise interference". Thesis, Monterey, California. Naval Postgraduate School, 2004. http://hdl.handle.net/10945/1557.
Pełny tekst źródłaThe performance of coherent and noncoherent RAKE receivers over a fading channel in the presence of pulse-noise interference and additive white Gaussian noise is analyzed. Coherent RAKE receivers require a pilot tone for coherent demodulation. Using a first order phase-lock-loop to recover a pilot tone with additive white Gaussian noise causes phase distortions at the phase-lock-loop output, which produce an irreducible phase noise error floor for soft decision Viterbi decoding. Both coherent and noncoherent RAKE receivers optimized for additive white Gaussian noise perform poorly when pulse-noise interference is present. When soft decision convolutional coding is considered, the performance degrades as the duty cycle of the pulse-noise interference signal decreases. The reverse is true for hard decision Viterbi decoding, since fewer bits experience interference and bit errors with high noise variance cannot dominate the decision statistics. Soft decision RAKE receiver optimized for pulse-noise interference and additive white Gaussian noise performed the best for both the coherent and noncoherent RAKE receivers. This receiver scales the received signal by the inverse of the variance on a bit-by-bit basis to minimize the effect of pulse-noise interference. The efficacy is demonstrated by analytical results, which reveal that this receiver reduces the probability of bit error down to the irreducible phase noise error floor when pulse-noise interference is present. This demonstrates how important it is to design the receiver for the intended operational environment.
Civilian, Department of Defense
Kagioglidis, Ioannis. "Performance analysis of a LINK-16/JTIDS compatible waveform with noncoherent detection, diversity and side information". Thesis, Monterey, California : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Sep/09Sep%5FKagioglidis%5FECE.pdf.
Pełny tekst źródłaThesis Advisor(s): Robertson, R. Clark. "September 2009." Description based on title screen as viewed on 6 November 2009. Author(s) subject terms: Link-16/JTIDS, (31, 15) Reed-Solomon (RS) coding, 32-ary Orthogonal signaling, Additive White Gaussian Noise (AWGN), Pulse-Noise Interference (PNI), Perfect Side Information (PSI). Includes bibliographical references (p. 49-51). Also available in print.
Koromilas, Ioannis. "Performance analysis of the link-16/JTIDS waveform with concatenated coding". Thesis, Monterey, California : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Sep/09Sep%5FKoromilas.pdf.
Pełny tekst źródłaThesis Advisor(s): Robertson, Ralph C. "September 2009." Description based on title screen as viewed on 5 November 2009. Author(s) subject terms: Link-16/JTIDS, Reed-Solomon (RS) coding, Cyclic Code-Shift Keying (CCSK), Minimum-Shift Keying (MSK), convolutional codes, concatenated codes, perfect side information (PSI), Pulsed-Noise Interference (PNI), Additive White Gaussian Noise (AWGN), coherent detection, noncoherent detection. Includes bibliographical references (p. 79). Also available in print.
Fountanas, Leonidas. "Principal components based techniques for hyperspectral image data". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Dec%5FFountanas.pdf.
Pełny tekst źródłaLeong, Alex Seak Chon. "Performance of estimation and detection algorithms in wireless networks". Connect to thesis, 2007. http://repository.unimelb.edu.au/10187/2229.
Pełny tekst źródłaWe first look at the hidden Markov model (HMM) filter with random measurement losses. The loss process is governed by another Markov chain. In the two-state case we derive analytical expressions to compute the probability of error. In the multi-state case we derive approximations that are valid at high signal-to-noise ratio (SNR). Relationships between the error probability and parameters of the loss process are investigated.
We then consider the problem of detecting two-state Markov chains in noise, under the Neyman-Pearson formulation. Our measure of performance here is the error exponent, and we give methods for computing this, firstly when channels are time-invariant, and then for time-varying fading channels. We also characterize the behaviour of the error exponent at high SNR.
We will look at the fixed lag Kalman smoother with random measurement losses. We investigate both the notion of estimator stability via expectation of the error covariance, and a probabilistic constraint on the error covariance. A comparison with the Kalman filter where lost measurements are retransmitted is made.
Finally we consider the distributed estimation of scalar linear systems using multiple sensors under the analog forwarding scheme. We study the asymptotic behaviour of the steady state error covariance as the number of sensors increases. We formulate optimization problems to minimize the sum power subject to error covariance constraints, and to minimize the error covariance subject to sum power constraints. We compare between the performance of multi-access and orthogonal access schemes, and for fading channels the effects of various levels of channel state information (CSI).
Fougias, Nikolaos. "High speed network access to the last-mile using fixed broadband wireless". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FFougias.pdf.
Pełny tekst źródłaThesis advisor(s): Burt Lundy. Includes bibliographical references (p. 99-100). Also available online.
Merrell, Paul Clark. "Structure from Motion Using Optical Flow Probability Distributions". Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd764.pdf.
Pełny tekst źródłaKalogrias, Christos. "Performance analysis of the IEEE 802.11A WLAN standard optimum and sub-optimum receiver in frequency-selective, slowly fading Nakagami channels with AWGN and pulsed noise jamming". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FKalogrias.pdf.
Pełny tekst źródłaThesis advisor(s): Clark Robertson. Includes bibliographical references (p. 143). Also available online.
Iskander, D. R. "The Generalised Bessel function K distribution and its application to the detection of signals in the presence of non-Gaussian interference". Thesis, Queensland University of Technology, 1997.
Znajdź pełny tekst źródłaHaddad, Nicholas K. "Performance analysis of active sonar classifiers". Ohio : Ohio University, 1990. http://www.ohiolink.edu/etd/view.cgi?ohiou1173206177.
Pełny tekst źródłaShaheem, Asri. "Iterative detection for wireless communications". University of Western Australia. School of Electrical, Electronic and Computer Engineering, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0223.
Pełny tekst źródłaChen, Pei. "An investigation of statistical aspects of linear subspace analysis for computer vision applications". Monash University, Dept. of Electrical and Computer Systems Engineering, 2004. http://arrow.monash.edu.au/hdl/1959.1/9705.
Pełny tekst źródłaRowlands, Daniel Alexander. "Spectral and dynamical properties of disordered and noisy quantum spin models". Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/284393.
Pełny tekst źródłaTerreaux, Eugénie. "Théorie des Matrices Aléatoires pour l'Imagerie Hyperspectrale". Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLC091/document.
Pełny tekst źródłaHyperspectral imaging generates large data due to the spectral and spatial high resolution, as it is the case for more and more other kinds of applications. For hyperspectral imaging, the data complexity comes from the spectral and spatial heterogeneity, the non-gaussianity of the noise and other physical processes. Nevertheless, this complexity enhances the wealth of collected informations, that need to be processed with adapted methods. Random matrix theory and robust processes are here suggested for hyperspectral imaging application: the random matrix theory is adapted to large data and the robustness enables to better take into account the non-gaussianity of the data. This thesis aims to enhance the model order selection on a hyperspectral image and the unmixing problem. As the model order selection is concerned, three new algorithms are developped, and the last one, more robust, gives better performances. One financial application is also presented. As for the unmixing problem, three methods that take into account the peculierities of hyperspectral imaging are suggested. The random matrix theory is of great interest for hyperspectral image processing, as demonstrated in this thesis. Differents methods developped here can be applied to other field of signal processing requiring the processing of large data
Ling, Hong. "Implementation of Stochastic Neural Networks for Approximating Random Processes". Master's thesis, Lincoln University. Environment, Society and Design Division, 2007. http://theses.lincoln.ac.nz/public/adt-NZLIU20080108.124352/.
Pełny tekst źródłaMeacci, Giovanni. "Physical Aspects of Min Oscillations in Escherichia Coli". Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2007. http://nbn-resolving.de/urn:nbn:de:swb:14-1169728830839-77682.
Pełny tekst źródłaMeacci, Giovanni. "Physical Aspects of Min Oscillations in Escherichia Coli". Doctoral thesis, Technische Universität Dresden, 2006. https://tud.qucosa.de/id/qucosa%3A23940.
Pełny tekst źródłaNavarrete, Hurtado Hugo Ariel. "Electromagnetic models for ultrasound image processing". Doctoral thesis, Universitat Politècnica de Catalunya, 2016. http://hdl.handle.net/10803/398235.
Pełny tekst źródłaEl ruido Speckle aparece cuando se utilizan sistemas de iluminación coherente, como por ejemplo Láser, Radar de Apertura Sintética (SAR), Sonar, Resonancia Magnética, rayos X y ultrasonidos. Los ecos dispersados por los centros dispersores distribuidos al azar en la estructura microscópica del medio son el origen de este fenómeno, que caracteriza las imágenes coherentes con un aspecto granular. Se puede demostrar que el ruido Speckle es de carácter multiplicativo, fuertemente correlacionados y lo más importante, con estadística no Gaussiana. Estas características son muy diferentes de la suposición tradicional de ruido aditivo gaussiano blanco, a menudo asumida en la segmentación de imágenes, filtrado, y en general, en el procesamiento de imágenes; lo cual se traduce en la reducción de la eficacia de los métodos para la extracción de información de la imagen final. La modelización estadística es de particular relevancia cuando se trata con datos Speckle, a fin de obtener algoritmos de procesamiento de imágenes eficientes. Además, el procesamiento no lineal de señales empleado en sistemas clínicos de imágenes por ultrasonido para reducir el rango dinámico de la señal de eco de entrada de manera que coincida con el rango dinámico más pequeño del dispositivo de visualización y resaltar así los objetos con dispersión más débil, modifica radicalmente la estadística de los datos. Esta reducción en el rango dinámico se logra normalmente a través de un amplificador logarítmico es decir, la compresión logarítmica, que comprime selectivamente las señales de entrada y una forma analítica para la expresión de la función de densidad de los datos transformados logarítmicamente es por lo general difícil de derivar. Esta tesis se centra en las distribuciones estadísticas de la amplitud de la señal comprimida logarítmicamente en las imágenes coherentes, y su principal objetivo es el desarrollo de un modelo estadístico general para las imágenes por ultrasonido comprimidas logarítmicamente en modo-B. El modelo desarrollado se adaptó, realizando las analogías físicas relevantes, del modelo multiplicativo en radares de apertura sintética (SAR). El Modelo propuesto puede describir correctamente los datos comprimidos logarítmicamente a partir datos generados con los diferentes modelos propuestos en la literatura especializada en procesamiento de imágenes por ultrasonido. Además, el modelo se aplica con éxito para modelar ecocardiografías en vivo. Se enuncian y demuestran los teoremas necesarios para dar cuenta de una demostración matemática rigurosa de la validez y generalidad del modelo. Además, se da una interpretación física de los parámetros y se establecen las conexiones entre el teorema central del límite generalizado, el modelo multiplicativo y la composición de distribuciones para los diferentes modelos propuestos hasta a la fecha. Se demuestra además que los parámetros del amplificador logarítmico se incluyen dentro de los parámetros del modelo y se estiman usando los métodos estándar de momentos y máxima verosimilitud. Por último, tres aplicaciones se desarrollan: filtrado de ruido Speckle, segmentación de ecocardiografías y un nuevo enfoque para la evaluación de la fracción de eyección cardiaca.
Li, Bo 1979. "Applications of noise theory to plasma fluctuations". Thesis, 2007. http://hdl.handle.net/2152/3334.
Pełny tekst źródłaRajpal, Sandeep. "Low complexity and high performance coded modulation systems". Thesis, 1994. http://hdl.handle.net/10125/9748.
Pełny tekst źródłaHsu, Shih-Chang, i 許世璋. "USING RANDOM MATRIX THEORY TO STUDY THE IMPACT OF PORTFOLIO RETURN WITH NOISE TRADING". Thesis, 2010. http://ndltd.ncl.edu.tw/handle/71562230597204511319.
Pełny tekst źródła國立臺北大學
企業管理學系
98
Based on the noise trading theory proposed by Black (1986) and DeLong et. al. (1990), this study first defines the meanings of information and noise, and then use mathematical deductive method to integrate noise trading and portfolio theory (Markowitz, 1952),and then use random matrix theory which is developed by nuclear physics to get the empirical evidences that impact of portfolio theory with noise trading. The first research proposition of the study is verified that noises are not individual stock risk and therefore, they could not be diversified through investment portfolios. Due to noises, the portfolios correlation matrix might have spurious correlation phenomenon. The second research proposition is that spurious correlation does not have sustainability and therefore, noises could not exist consistently in the stock market. Based on mathematical development, the third proposition is verified that portfolio risk is higher when noises existed. Furthermore, the fourth proposition is verified that due to noises interference, the efficiency of investment portfolios is reduced. Based on these propositions could be verify, proposition 2, proposition 3, and proposition 4 would be transformed to hypothesis 1, hypothesis 2, and hypothesis 3. “With the increase during the holding period, portfolio performance in information and in interference will gradually produce a significant difference” is hypothesis 1, which could be used to test whether noise is systematic risk or not. “The variance in information portfolio is smaller than in interference portfolio” is hypothesis 2, which is used to test whether risk of the portfolio could be rising by noises. Hypothesis 3 tells that, “the Sharpe ratio of information portfolio is higher than interference one”. Using hypothesis 3 could test possibility the efficiency of portfolio would be reduced by noises. There are 1242 samples of this study which uses 19 sector indices daily rate of returns in Taiwan stock market from the beginning in 2005 to the end in 2009. This Study uses method to filter random matrix which was developed by Bouchaud and Potters (2000), and investigates the empirical evidences of effect in portfolio with noise trading every holding periods which be used method of moving windows with 30 and 60 days’ formation periods. The result supports hypothesis 2, but hypothesis 1 and hypothesis 3 was gat partial support.
Díaz, Espinosa Oliver Rodolfo. "Renormalization and central limit theorem for critical dynamical systems with weak external random noise". Thesis, 2006. http://hdl.handle.net/2152/2715.
Pełny tekst źródłaRobbertse, Johannes Lodewickes. "Estimation of parameters and tests for parameter changes in fractional Gaussian noise". Thesis, 2013. http://hdl.handle.net/10210/8570.
Pełny tekst źródłaFractional Brownian motion and its increment process, fractional Gaussian noise, are syn- onymous with the concept of long range dependence. A strictly stationary time series is said to exhibit long range dependence or long memory if its autocorrelations decrease to zero as a power of the lag, but their sum over all lags is not absolutely convergent. This phenomenon has been observed in numerous scientific areas such as hydrology, ethernet traffic data, stock returns and exchange rates, to name just a few. The extent of long memory dependence is characterized by the value of the so called Hurst exponent or Hurst coefficient H. Approximate normality and unbiasedness of the maximum likelihood estimate of H hold reasonably well for sample sizes as small as 20 if the mean and scale parameters are known. We show in a Monte Carlo study that if the latter two parameters are unknown, the bias and variance of the maximum likelihood estimate of H both increase substantially. We also show that the bias can be reduced by using a jackknife or parametric bootstrap proce- dure. However, in very large samples, maximum likelihood estimation becomes problematic because of the large dimension of the covariance matrix that must be inverted. We consider an approach for estimating the Hurst exponent by taking first order differ- ences of fractional Gaussian noise. We find that this differenced process has short memory and that, consequently, we may assume approximate independence between the estimates of the Hurst exponents in disjoint blocks of data. We split the data into a number of con- tiguous blocks, each containing a relatively small number of observations. Computation of the likelihood function in a block then presents no computational problem. We form a pseudo likelihood function consisting of the product of the likelihood functions in each of the blocks and provide a formula for the standard error of the resulting estimator of H. This formula is shown in a Monte Carlo study to provide a good approximation to the true standard error. Application of the methodology is illustrated in two data sets. The long memory property of a time series is primarily characterized by H. In general, such series are exceptionally long, therefore it is natural to enquire whether or not H remains constant over the full extent of the time series. We propose a number of tests for the hypothesis that H remains constant, against an alternative of a change in one or more values of H. Formulas are given to enable calculation of asymptotic p-values. We also propose a permutational procedure for evaluating exact p-values. The proposed tests are applied to three sets of data.
Friedman, Evan Kyle. "Stochasticity in Games: Theory and Experiment". Thesis, 2020. https://doi.org/10.7916/d8-mx1k-qh39.
Pełny tekst źródłaAhmed, A., Yim Fun Hu i James M. Noras. "Noise Variance Estimation for Spectrum Sensing in Cognitive Radio Networks". 2014. http://hdl.handle.net/10454/10575.
Pełny tekst źródłaSpectrum sensing is used in cognitive radio systems to detect the availability of spectrum holes for secondary usage. The simplest and most famous spectrum sensing techniques are based either on energy detection or eigenspace analysis from Random Matrix Theory (RMT) such as using the Marchenko-Pastur law. These schemes suffer from uncertainty in estimating the noise variance which reduces their performance. In this paper we propose a new method to evaluate the noise variance that can eliminate the limitations of the aforementioned schemes. This method estimates the noise variance from a measurement set of noisy signals or noise-only signals. Extensive simulations show that the proposed method performs well in estimating the noise variance. Its performance greatly improves with increasing numbers of measurements and also with increasing numbers of samples taken per measurement.
Asenstorfer, John A. (John Anthony). "Source-channel coding for CELP speech coders / J.A. Asenstorfer". 1994. http://hdl.handle.net/2440/18512.
Pełny tekst źródłaxiv, 205 leaves : ill. ; 30 cm.
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
This thesis is concerned with methods for protecting speech coding parameters transmitted over noisy channels. A linear prediction (LP) coder is employed to remove the short term correlations of speech. Protection of two sets of parameters are investigated.
Thesis (Ph.D.)--University of Adelaide, Dept. of Electrical and Electronic Engineering, 1995?
Planjery, Shiva Kumar. "Design of rate-compatible punctured repeat-accumulate codes". Thesis, 2007. http://hdl.handle.net/1828/2378.
Pełny tekst źródłaSingh, Navin Runjit. "Multiuser demodulation for DS-CDMA systems in fading channels". Thesis, 2000. http://hdl.handle.net/10413/5534.
Pełny tekst źródłaThesis (M.Sc.Eng.)-University of Natal, Durban, 2000.
TSAI, WEI-CHUNG, i 蔡崴仲. "An Efficient Video Filter for Random-Value Noise Based on Directional Peer-Group and Fuzzy Theorem". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/39bb3d.
Pełny tekst źródła國立宜蘭大學
電子工程學系碩士班
107
Noise suppressing is a necessary process for image and video. Today, many excellent image filter have been provided and applied widely. However, there is few discussion of processing Random-Value noise. Especially, literature about video noise processing with random value impulse noise is fewer. This thesis is mainly based on Peer-Group image filter which is proposed previously by laboratory. It seems to have good effect after test, but not that preferable when applying to processing video. This thesis would improve this method and apply it to videos. The proposed method mainly consists of three parts – detection, filtering and secondary verification. We first covert detected pixels to fuzzy value according to fuzzy theory, then use the concept of Peer-Group with directional, double subsidies directional and similarity module to detect and filter random noises. At last, because the settings and threshold of previous detection and reduction are roughly, we conduct secondary verification on the pixels which are justified as noise-free. This could diminish some misjudgements. The proposed method basically uses addition and subtraction operations to detect and reduction filter and avoids complex operation. Simulations confirm that the novel filter has significant improvement on detection and reduction when applying this method to video.