Pub Date : 2016-10-01DOI: 10.1109/CISP-BMEI.2016.7853035
Chin-ling Chen, Hsin-Chiao Chen
We has proposed a DDoS detection combining rule-based and anomaly-based scheme, in which three types of system resource usage are examined. We first analyze the performance of the proposed system under the conditions imposed by both of the normal traffic and the TFN2K attack. Secondly, we find the minimum cost, such as the saturation time and critical point, for attack traffic to saturate the victim. Thirdly, a thorough investigation on comparison of the proposed scheme and the other well-known schemes is presented. Our analysis and experiments demonstrate that the proposed scheme along with ANOVA can work very well with suitable combination and fine tuning of threshold value.
{"title":"A resource utilization measurement detection against DDoS attacks","authors":"Chin-ling Chen, Hsin-Chiao Chen","doi":"10.1109/CISP-BMEI.2016.7853035","DOIUrl":"https://doi.org/10.1109/CISP-BMEI.2016.7853035","url":null,"abstract":"We has proposed a DDoS detection combining rule-based and anomaly-based scheme, in which three types of system resource usage are examined. We first analyze the performance of the proposed system under the conditions imposed by both of the normal traffic and the TFN2K attack. Secondly, we find the minimum cost, such as the saturation time and critical point, for attack traffic to saturate the victim. Thirdly, a thorough investigation on comparison of the proposed scheme and the other well-known schemes is presented. Our analysis and experiments demonstrate that the proposed scheme along with ANOVA can work very well with suitable combination and fine tuning of threshold value.","PeriodicalId":275095,"journal":{"name":"2016 9th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics (CISP-BMEI)","volume":"109 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131074559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Analysis of course survey data are foundationally important because it has a close relation with students' skills training and talent development. However, there are multiple categories of classification information that characterized different students from different perspectives, such as genders, classes, types or regions. Compared to the correlation between survey data with individual kind of classification, consensus between those with multiple categories is more informative. However, traditional methods can not handle this problem with multiple kinds of classification categories. In view of the problem above, in this work, we proposed to conduct a new factor analysis method in the consensus fashion. Specifically, we computed a consensus structure of different categories of classifications and the similarity matrices for each factor, respectively. Motivated by the famous clustering measure RAND, we proposed a generalized method called Rmm which is used to compute the consistency of two different similarity matrices, with the option to adopt weights. Followed the similar spirit of Rmm, we also computed pairwise consistency between different factors without category information. Experimental results show that: (i) Our Rmm method is capable to combine different categories of classification information in an effective manner;(ii) our Rmm method preserve promising linear property for the combination of classifications; and (iii) Our Rmm method can be used in the case of fuzzy similarity, which is more applicable in different scenarios. With the proposed method, this work attempted to figure out the veiled laws and covered from read data, with the hope to provide suggestions for course arrangement and personnel cultivating program in universities, and to shed light on personal development of university students who major on computer science.
{"title":"Ensemble-based factor analysis of survey data on computer science courses","authors":"Shaohong Zhang, Jiqiao Li, Haihuang Huang, Hongqiu Wu, Haodong Lin, Wenxiao Qiu","doi":"10.1109/CISP-BMEI.2016.7853032","DOIUrl":"https://doi.org/10.1109/CISP-BMEI.2016.7853032","url":null,"abstract":"Analysis of course survey data are foundationally important because it has a close relation with students' skills training and talent development. However, there are multiple categories of classification information that characterized different students from different perspectives, such as genders, classes, types or regions. Compared to the correlation between survey data with individual kind of classification, consensus between those with multiple categories is more informative. However, traditional methods can not handle this problem with multiple kinds of classification categories. In view of the problem above, in this work, we proposed to conduct a new factor analysis method in the consensus fashion. Specifically, we computed a consensus structure of different categories of classifications and the similarity matrices for each factor, respectively. Motivated by the famous clustering measure RAND, we proposed a generalized method called Rmm which is used to compute the consistency of two different similarity matrices, with the option to adopt weights. Followed the similar spirit of Rmm, we also computed pairwise consistency between different factors without category information. Experimental results show that: (i) Our Rmm method is capable to combine different categories of classification information in an effective manner;(ii) our Rmm method preserve promising linear property for the combination of classifications; and (iii) Our Rmm method can be used in the case of fuzzy similarity, which is more applicable in different scenarios. With the proposed method, this work attempted to figure out the veiled laws and covered from read data, with the hope to provide suggestions for course arrangement and personnel cultivating program in universities, and to shed light on personal development of university students who major on computer science.","PeriodicalId":275095,"journal":{"name":"2016 9th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics (CISP-BMEI)","volume":"20 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130843210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The magnetically induced hyperthermia (MIH) system, based on the principle that milliscaled ferromagnetic alloy thermoseeds produce heat in a radio frequency (RF) alternating magnetic field due to eddy current and hysteresis, has been used in tumor clinical trials for decades. To provide guidance for implant distribution in tumors and temperature field simulation of MIH planning system, the theoretical formula for power absorption of an implant is deduced investigating geometry and orientation using the electromagnetic field constraint equation, including cylindrical and spherical implants. Then, the electromagnetic parameters that affect the power absorption have been analyzed using Matlab to simplify the formula. This simplified formula serves as a calculation model that can be easily programmed for temperature field simulation in a MIH system. Finally, the performance of several implants used for MIH is compared by power absorption per unit volume. The results show that the power absorption of the cylindrical implant per unit volume is maximized when the axis is parallel to the external magnetic field. The absorbed power of the spherical implant is slightly less than that of the cylindrical implant, and the formula is independent of the magnetic field direction. As a result, the use of a spherical implant will lead to a simplified calculation of the temperature field in a MIH system.
{"title":"Power absorption of milliscaled implants in alternating magnetic field for magnetically induced hyperthermia","authors":"Jianan Wu, Heng Wang, Xianwen Zhang, Liyan Zhang, Jintian Tang","doi":"10.1109/CISP-BMEI.2016.7852979","DOIUrl":"https://doi.org/10.1109/CISP-BMEI.2016.7852979","url":null,"abstract":"The magnetically induced hyperthermia (MIH) system, based on the principle that milliscaled ferromagnetic alloy thermoseeds produce heat in a radio frequency (RF) alternating magnetic field due to eddy current and hysteresis, has been used in tumor clinical trials for decades. To provide guidance for implant distribution in tumors and temperature field simulation of MIH planning system, the theoretical formula for power absorption of an implant is deduced investigating geometry and orientation using the electromagnetic field constraint equation, including cylindrical and spherical implants. Then, the electromagnetic parameters that affect the power absorption have been analyzed using Matlab to simplify the formula. This simplified formula serves as a calculation model that can be easily programmed for temperature field simulation in a MIH system. Finally, the performance of several implants used for MIH is compared by power absorption per unit volume. The results show that the power absorption of the cylindrical implant per unit volume is maximized when the axis is parallel to the external magnetic field. The absorbed power of the spherical implant is slightly less than that of the cylindrical implant, and the formula is independent of the magnetic field direction. As a result, the use of a spherical implant will lead to a simplified calculation of the temperature field in a MIH system.","PeriodicalId":275095,"journal":{"name":"2016 9th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics (CISP-BMEI)","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128867770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/CISP-BMEI.2016.7852868
Fanrui Lin, Zhijun Zhao, Mengya Peng, Lingyun Xie
Multimedia applications make researchers focus on the simultaneous effect of visual and auditory stimulation. Previous research revealed many facts about visual-auditory interaction. But the relationship between colors and pitch discrimination was hardly discussed. In this paper, the influence of colors on pitch discrimination of pure tones was investigated. Different color stimuli were used in subjective experiments of measuring the accuracy of pitch discrimination, and the data were compared with auditory-only experiments. Experimental results showed that the accuracy of pitch identification with color stimuli increases. Warm colors and cold colors did not have remarkable difference. The accuracy increased most when the color was blue. Further analysis showed that if the discrimination task was more difficult,the influence of colors was correspondingly more observable.
{"title":"Effect of color on pitch discrimination of pure tone","authors":"Fanrui Lin, Zhijun Zhao, Mengya Peng, Lingyun Xie","doi":"10.1109/CISP-BMEI.2016.7852868","DOIUrl":"https://doi.org/10.1109/CISP-BMEI.2016.7852868","url":null,"abstract":"Multimedia applications make researchers focus on the simultaneous effect of visual and auditory stimulation. Previous research revealed many facts about visual-auditory interaction. But the relationship between colors and pitch discrimination was hardly discussed. In this paper, the influence of colors on pitch discrimination of pure tones was investigated. Different color stimuli were used in subjective experiments of measuring the accuracy of pitch discrimination, and the data were compared with auditory-only experiments. Experimental results showed that the accuracy of pitch identification with color stimuli increases. Warm colors and cold colors did not have remarkable difference. The accuracy increased most when the color was blue. Further analysis showed that if the discrimination task was more difficult,the influence of colors was correspondingly more observable.","PeriodicalId":275095,"journal":{"name":"2016 9th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics (CISP-BMEI)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121456494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/CISP-BMEI.2016.7852986
Lifei Sun, Sen Li, Changsen Sun, Hailong Liu
The nerve conduction blocking by high frequency biphasic (HFB) electrical stimulations has many potentially valuable clinical applications, but its safety margins require further evaluations. This simulation study aimed to construct an axonal model to investigate the effects of HFB electrical currents on the axonal conductibility and ionic concentrations. The axonal model was constructed in the software of NEURON by incorporating the McIntyre-Richardson-Grill model's geometries, Frankenhaeuser-Huxley and passive equations, ionic diffusion mechanism, and sodium pump activities. The applied 5 s HFB electrical stimulation apparently altered the axon's conductibility, which manifested lowered AP amplitudes, elevated resting membrane potentials, and delayed AP initiation times. These changes did not gain complete recoveries within the observed 55 s period, and showed to be mainly attributed to the induced alterations in ionic concentrations of nodal [Na+]i, nodal [K+]i and para-nodal [Na+]o. The results implied that the inter-nodal segments played a buffering role against changes of intracellular nodal ionic concentrations, and the intra-cellular ionic concentrations recovered at the price of increases in para-nodal [Na+]o. This study provided more information useful for evaluating the safety margins of nerve conduction blocking by HFB electrical stimulations, and are valuable for designing more safe and applicable protocols.
高频双相电刺激阻断神经传导有许多潜在的临床应用价值，但其安全性有待进一步评估。本模拟研究旨在建立一个轴突模型，研究HFB电流对轴突电导率和离子浓度的影响。结合McIntyre-Richardson-Grill模型几何、Frankenhaeuser-Huxley方程和被动方程、离子扩散机理和钠泵活性，在NEURON软件中构建轴突模型。施加5 s HFB电刺激明显改变了轴突的电导率，表现为AP振幅降低，静息膜电位升高，AP起始时间延迟。这些变化在观察到的55 s内没有完全恢复，主要是由于诱导了节点[Na+]i、节点[K+]i和节点旁[Na+]o离子浓度的变化。结果表明，胞间节段对胞内离子浓度的变化具有缓冲作用，胞内离子浓度的恢复是以胞旁[Na+]o的增加为代价的。本研究为HFB电刺激阻断神经传导的安全边际评估提供了更多有用的信息，对设计更安全、更适用的方案具有重要价值。
{"title":"An axonal model for analysis of ionic concentration alterations induced by high frequency electrical stimulations","authors":"Lifei Sun, Sen Li, Changsen Sun, Hailong Liu","doi":"10.1109/CISP-BMEI.2016.7852986","DOIUrl":"https://doi.org/10.1109/CISP-BMEI.2016.7852986","url":null,"abstract":"The nerve conduction blocking by high frequency biphasic (HFB) electrical stimulations has many potentially valuable clinical applications, but its safety margins require further evaluations. This simulation study aimed to construct an axonal model to investigate the effects of HFB electrical currents on the axonal conductibility and ionic concentrations. The axonal model was constructed in the software of NEURON by incorporating the McIntyre-Richardson-Grill model's geometries, Frankenhaeuser-Huxley and passive equations, ionic diffusion mechanism, and sodium pump activities. The applied 5 s HFB electrical stimulation apparently altered the axon's conductibility, which manifested lowered AP amplitudes, elevated resting membrane potentials, and delayed AP initiation times. These changes did not gain complete recoveries within the observed 55 s period, and showed to be mainly attributed to the induced alterations in ionic concentrations of nodal [Na+]i, nodal [K+]i and para-nodal [Na+]o. The results implied that the inter-nodal segments played a buffering role against changes of intracellular nodal ionic concentrations, and the intra-cellular ionic concentrations recovered at the price of increases in para-nodal [Na+]o. This study provided more information useful for evaluating the safety margins of nerve conduction blocking by HFB electrical stimulations, and are valuable for designing more safe and applicable protocols.","PeriodicalId":275095,"journal":{"name":"2016 9th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics (CISP-BMEI)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126596348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/CISP-BMEI.2016.7852962
Yingtuo Wang, Tian Liu, Shuyin Li, Jue Wang
When the eyes were given maximum disparity, a good relationship was found between visual fatigue and the static or dynamic parameters of vergence and accommodation, as well as physiological signals and subjective evaluation value. The common experimental paradigm of asthenopia is to give the dynamic and repetitive stimulus. Therefore, the current research was proposed to devise a static and sustained stimulus of prism-induced diplopia and projected an experiment to induce visual fatigue by diplopia. Subjects put on the based-out prism whose degree could be adjusted by two pulleys on top of it, they wear their correctional glasses and adjusted slowly the degree of prism until the eyes were diplopia. This state should last for ten minutes in total, of which two minutes as a trial and had an intermediate rested for 30 seconds. The electroencephalogram (EEG) data and critical fusion frequency of 13 subjects were recorded for closed eyes before and after fatigue. In brain occipital, parietal, temporal and frontal lobe, ratio algorithms (α+θ)/β were significantly increased, while gravity frequency (GF) and power spectral entropy (PSE) were significantly reduced, and decline in the critical fusion frequency (CFF) also exists a significant difference. CFF also had a significant difference in the Spearman correlation with PSE, so EEG has a strong correlation with visual fatigue and EEG power spectral components might be a useful method to evaluate the degree of ocular fatigue.
{"title":"Using electroencephalogram spectral components to assess visual fatigue caused by sustained prism-induced diplopia","authors":"Yingtuo Wang, Tian Liu, Shuyin Li, Jue Wang","doi":"10.1109/CISP-BMEI.2016.7852962","DOIUrl":"https://doi.org/10.1109/CISP-BMEI.2016.7852962","url":null,"abstract":"When the eyes were given maximum disparity, a good relationship was found between visual fatigue and the static or dynamic parameters of vergence and accommodation, as well as physiological signals and subjective evaluation value. The common experimental paradigm of asthenopia is to give the dynamic and repetitive stimulus. Therefore, the current research was proposed to devise a static and sustained stimulus of prism-induced diplopia and projected an experiment to induce visual fatigue by diplopia. Subjects put on the based-out prism whose degree could be adjusted by two pulleys on top of it, they wear their correctional glasses and adjusted slowly the degree of prism until the eyes were diplopia. This state should last for ten minutes in total, of which two minutes as a trial and had an intermediate rested for 30 seconds. The electroencephalogram (EEG) data and critical fusion frequency of 13 subjects were recorded for closed eyes before and after fatigue. In brain occipital, parietal, temporal and frontal lobe, ratio algorithms (α+θ)/β were significantly increased, while gravity frequency (GF) and power spectral entropy (PSE) were significantly reduced, and decline in the critical fusion frequency (CFF) also exists a significant difference. CFF also had a significant difference in the Spearman correlation with PSE, so EEG has a strong correlation with visual fatigue and EEG power spectral components might be a useful method to evaluate the degree of ocular fatigue.","PeriodicalId":275095,"journal":{"name":"2016 9th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics (CISP-BMEI)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125927300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/CISP-BMEI.2016.7852695
Li Xu, Xiuhua Jiang
High Definition video color information research and analysis, mainly considering compression process brought about a decline in the quality of visual perception. Four subjective evaluation is designed and experiments has been done: The diversity of the human eye perception of time; rate selection; and two subjective evaluation experiments of the video with DSCQS as the standard. The High Definition video main characteristics of the human eye perception between color and compression rate injury. Before the experiment, statistical methods were used to calculate the actual sample size; according to R-REC-BT series of standards for subjective evaluation results of the statistical data after the experiment. Finally, analyzed the data results combined with color visual characteristics of the human eye.
{"title":"Visual perception features of color damage in High Definition video compression","authors":"Li Xu, Xiuhua Jiang","doi":"10.1109/CISP-BMEI.2016.7852695","DOIUrl":"https://doi.org/10.1109/CISP-BMEI.2016.7852695","url":null,"abstract":"High Definition video color information research and analysis, mainly considering compression process brought about a decline in the quality of visual perception. Four subjective evaluation is designed and experiments has been done: The diversity of the human eye perception of time; rate selection; and two subjective evaluation experiments of the video with DSCQS as the standard. The High Definition video main characteristics of the human eye perception between color and compression rate injury. Before the experiment, statistical methods were used to calculate the actual sample size; according to R-REC-BT series of standards for subjective evaluation results of the statistical data after the experiment. Finally, analyzed the data results combined with color visual characteristics of the human eye.","PeriodicalId":275095,"journal":{"name":"2016 9th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics (CISP-BMEI)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126602434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/CISP-BMEI.2016.7853021
Yuan Zhao, Wei Peng
Objective To evaluate the dosage effect of position numbers in intensity-modulated radiotherapy plan (IMRT) for breast cancer. Method A 56 year old patient with breast cancer was selected and treated by IMRT in this study. According to the images of the position verification, the target dosage and organ at risk (OAR) were calculated and verified in detail. Results When the position number was 5, the doses of the target and OARs were CTV 48.8Gy, PTV 48.2Gy, spinal cord 27.5Gy, lung 5.5Gy with V20<11.5%, heart 16.0Gy with V10<33.7%, femoral head 38.2Gy. Although all the doses met the prescription of radiotherapeutic physicist, however, the doses of OAR closed to the dosage limitation. In order the decrease the doses of OAR, the number of position verification increased to 7. Therefore the doses of OAR decreased significantly. Conclusion The positioning error can be decreased by increasing the number of position verification.
{"title":"Evaluation of dosage effect of position numbers in IMRT for breast cancer","authors":"Yuan Zhao, Wei Peng","doi":"10.1109/CISP-BMEI.2016.7853021","DOIUrl":"https://doi.org/10.1109/CISP-BMEI.2016.7853021","url":null,"abstract":"Objective To evaluate the dosage effect of position numbers in intensity-modulated radiotherapy plan (IMRT) for breast cancer. Method A 56 year old patient with breast cancer was selected and treated by IMRT in this study. According to the images of the position verification, the target dosage and organ at risk (OAR) were calculated and verified in detail. Results When the position number was 5, the doses of the target and OARs were CTV 48.8Gy, PTV 48.2Gy, spinal cord 27.5Gy, lung 5.5Gy with V20<11.5%, heart 16.0Gy with V10<33.7%, femoral head 38.2Gy. Although all the doses met the prescription of radiotherapeutic physicist, however, the doses of OAR closed to the dosage limitation. In order the decrease the doses of OAR, the number of position verification increased to 7. Therefore the doses of OAR decreased significantly. Conclusion The positioning error can be decreased by increasing the number of position verification.","PeriodicalId":275095,"journal":{"name":"2016 9th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics (CISP-BMEI)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116618218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/CISP-BMEI.2016.7852841
Ye Li, Qiuyun Hao, P. Zhang, Jingsai Jiang, Xiaofeng Ma, Yanhong Fan, H. V. Davydau
In order to improve the channel bandwidth utilization of voice communication, a variable bit rate speech coding algorithm based on enhanced mixed excitation linear prediction (MELPe) is proposed in the paper. In voice communication, only about 40% of the time is occupied by talking, whereas the rest is engaged by silence or background noise. In addition, unvoiced frame usually requires less transmission rate than the voiced one in low bit rate speech coding algorithms. Therefore, always using the same coding bit rate for speech coding is a waste of channel resource. In this paper, the input signal is divided into speech and silence by using voice activity detection (VAD) technology. And the speech frames are divided into voiced frame or unvoiced frame. They use different coding rates for speech coding and data transmission. All of the parameters are encoded, transmitted and decoded in voiced frame. Only gain parameters, LSF parameters, pitch parameters and overall voicing are encoded, transmitted and decoded in the unvoiced frame. Furthermore, only the gain parameters and the first level LSF parameters are encoded, transmitted and decoded in the silence frame. When about 40% of the time is occupied by talking, compare with the traditional 2.4 kbps MELPe vocoder, the average coding rate of the proposed variable bit rate vocoder can reach 1.33 kbps. But they can achieve the same quality of synthetic speech. Experimental results show that the proposed method reduces the average coding rate, and the synthetic background noise has good comfort on the subjective sense of hearing.
{"title":"A variable-bit-rate speech coding algorithm based on enhanced mixed excitation linear prediction","authors":"Ye Li, Qiuyun Hao, P. Zhang, Jingsai Jiang, Xiaofeng Ma, Yanhong Fan, H. V. Davydau","doi":"10.1109/CISP-BMEI.2016.7852841","DOIUrl":"https://doi.org/10.1109/CISP-BMEI.2016.7852841","url":null,"abstract":"In order to improve the channel bandwidth utilization of voice communication, a variable bit rate speech coding algorithm based on enhanced mixed excitation linear prediction (MELPe) is proposed in the paper. In voice communication, only about 40% of the time is occupied by talking, whereas the rest is engaged by silence or background noise. In addition, unvoiced frame usually requires less transmission rate than the voiced one in low bit rate speech coding algorithms. Therefore, always using the same coding bit rate for speech coding is a waste of channel resource. In this paper, the input signal is divided into speech and silence by using voice activity detection (VAD) technology. And the speech frames are divided into voiced frame or unvoiced frame. They use different coding rates for speech coding and data transmission. All of the parameters are encoded, transmitted and decoded in voiced frame. Only gain parameters, LSF parameters, pitch parameters and overall voicing are encoded, transmitted and decoded in the unvoiced frame. Furthermore, only the gain parameters and the first level LSF parameters are encoded, transmitted and decoded in the silence frame. When about 40% of the time is occupied by talking, compare with the traditional 2.4 kbps MELPe vocoder, the average coding rate of the proposed variable bit rate vocoder can reach 1.33 kbps. But they can achieve the same quality of synthetic speech. Experimental results show that the proposed method reduces the average coding rate, and the synthetic background noise has good comfort on the subjective sense of hearing.","PeriodicalId":275095,"journal":{"name":"2016 9th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics (CISP-BMEI)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121382782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/CISP-BMEI.2016.7852913
Xiao Chen, K. Ge, Yanguo Wang, Man Guo
the regularization theory is a key tool for geophysical inversions. In this paper, two regularization parameters are introduced into the magnetotelluric (MT)-gravity joint inversion. The very fast simulated annealing (VFSA) method is adopted to optimize the objective functional of the joint inversion. In view of the randomness of VFSA method for model productions, a new adaptive method is proposed to determine values of the regularization parameters. The synthetic model test for different projects shows an effectiveness of the new approach for regularized joint inversions.
{"title":"Adaptive choice of bi-regularization parameters in the joint inversion of magnetotelluric and gravity","authors":"Xiao Chen, K. Ge, Yanguo Wang, Man Guo","doi":"10.1109/CISP-BMEI.2016.7852913","DOIUrl":"https://doi.org/10.1109/CISP-BMEI.2016.7852913","url":null,"abstract":"the regularization theory is a key tool for geophysical inversions. In this paper, two regularization parameters are introduced into the magnetotelluric (MT)-gravity joint inversion. The very fast simulated annealing (VFSA) method is adopted to optimize the objective functional of the joint inversion. In view of the randomness of VFSA method for model productions, a new adaptive method is proposed to determine values of the regularization parameters. The synthetic model test for different projects shows an effectiveness of the new approach for regularized joint inversions.","PeriodicalId":275095,"journal":{"name":"2016 9th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics (CISP-BMEI)","volume":"60 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116626530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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