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2011 National Conference on Communications (NCC) Pub Date : 2022-09-01 DOI: 10.1111/socf.12214
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引用次数: 0
RF energy harvesting system from cell towers in 900MHz band 900兆赫波段蜂窝塔射频能量收集系统
2011 National Conference on Communications (NCC) Pub Date : 2011-03-17 DOI: 10.1109/NCC.2011.5734733
Mahima Arrawatia, M. Baghini, G. Kumar
{"title":"RF energy harvesting system from cell towers in 900MHz band","authors":"Mahima Arrawatia, M. Baghini, G. Kumar","doi":"10.1109/NCC.2011.5734733","DOIUrl":"https://doi.org/10.1109/NCC.2011.5734733","url":null,"abstract":"An experimental RF energy harvesting system to harvest energy from cell towers is presented in this paper. An electromagnetically-coupled square microstrip antenna is designed and fabricated for deployment in the presented system. Antenna gain of 9.1dB and bandwidth from 877 MHz to 998 MHz is achieved. A Schottky diode-based single stage voltage doubler and six-stage voltage doubler has also been designed and fabricated for DC voltage generation. Measured results show that a voltage of 2.78V is obtained at a distance of 10m from the cell tower and a voltage of 0.87V is obtained at a distance of 50m.","PeriodicalId":158295,"journal":{"name":"2011 National Conference on Communications (NCC)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117150051","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}
引用次数: 86
Temporal classification of events in cricket videos 板球视频事件的时间分类
2011 National Conference on Communications (NCC) Pub Date : 2011-03-17 DOI: 10.1109/NCC.2011.5734784
N. Harikrishna, S. Satheesh, S. Sriram, K. S. Easwarakumar
{"title":"Temporal classification of events in cricket videos","authors":"N. Harikrishna, S. Satheesh, S. Sriram, K. S. Easwarakumar","doi":"10.1109/NCC.2011.5734784","DOIUrl":"https://doi.org/10.1109/NCC.2011.5734784","url":null,"abstract":"Video search today uses the metadata surrounding the video, ignoring its semantic content. Over the years, a lot of research has gone into indexing and browsing of sports video content. In this work, we present a novel approach for classification of events in cricket videos and thus, summarize its visual content. The proposed method segments a cricket video into shots and identifies the visual content in them. Using sequential pattern mining and support vector machine, we classify the sequence of shots into four events, namely RUN, FOUR, SIX and OUT. The cricket video is then summarized based on user-supplied parameters. The performance of the system has been tested on a number of cricket video clips and was found to have an accuracy of 87.8%.","PeriodicalId":158295,"journal":{"name":"2011 National Conference on Communications (NCC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124937534","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}
引用次数: 29
An experimental evaluation of CUBIC TCP in a small buffer regime 小缓冲区CUBIC TCP的实验评价
2011 National Conference on Communications (NCC) Pub Date : 2011-03-17 DOI: 10.1109/NCC.2011.5734779
Shashank Jain, Gaurav Raina
{"title":"An experimental evaluation of CUBIC TCP in a small buffer regime","authors":"Shashank Jain, Gaurav Raina","doi":"10.1109/NCC.2011.5734779","DOIUrl":"https://doi.org/10.1109/NCC.2011.5734779","url":null,"abstract":"CUBIC TCP is an enhancement over BIC (Binary Increase Congestion Control) with a cubic window growth function. It has been optimized for high bandwidth-delay product environments and has been the default TCP implementation in Linux since kernel-2.6.18.","PeriodicalId":158295,"journal":{"name":"2011 National Conference on Communications (NCC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125010672","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}
引用次数: 23
Detection of burst onset landmarks in speech using rate of change of spectral moments 利用谱矩变化率检测语音突发事件标志
2011 National Conference on Communications (NCC) Pub Date : 2011-03-17 DOI: 10.1109/NCC.2011.5734728
A. Jayan, P. S. Rajath Bhat, P. C. Pandey
{"title":"Detection of burst onset landmarks in speech using rate of change of spectral moments","authors":"A. Jayan, P. S. Rajath Bhat, P. C. Pandey","doi":"10.1109/NCC.2011.5734728","DOIUrl":"https://doi.org/10.1109/NCC.2011.5734728","url":null,"abstract":"Burst onset landmarks in the speech signal are transient segments with low energy and their accurate detection is important in applications involving landmark based speech modification, estimation of place of closure for speech training aids, and phoneme recognition. Rate of change measures of energy parameters from spectral bands with fixed boundaries are generally used for landmark detection. The differences in the parameter variation rates and ranges, correlations among them, and their dependencies on speakers, make them less suitable for precise time localization of burst onsets. A method for detection of burst onset landmarks is presented which uses rate of change of spectral moments, in addition to energy parameters of the short-time speech spectrum. Evaluation results indicate that this method can give high detection rates with improved temporal accuracy.","PeriodicalId":158295,"journal":{"name":"2011 National Conference on Communications (NCC)","volume":"945 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123297380","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}
引用次数: 9
Unitary precoders for CQI reliability in closed loop MU-MIMO OFDM systems 闭环MU-MIMO OFDM系统中CQI可靠性的统一预编码器
2011 National Conference on Communications (NCC) Pub Date : 2011-03-17 DOI: 10.1109/NCC.2011.5734730
H. Acharya, S. R. Yerrapareddy, K. Kuchi, B. Ramamurthi
{"title":"Unitary precoders for CQI reliability in closed loop MU-MIMO OFDM systems","authors":"H. Acharya, S. R. Yerrapareddy, K. Kuchi, B. Ramamurthi","doi":"10.1109/NCC.2011.5734730","DOIUrl":"https://doi.org/10.1109/NCC.2011.5734730","url":null,"abstract":"In Multi-userMIMO (MU-MIMO), the Base Station (BS) schedules multiple users simultaneously on the same resources. Closed loop MU-MIMO uses explicit feedback from each of these users for scheduling and allocation of resources. In this scheme, an estimate of the SINR experienced is fed back by each user and is known as the CQI (Channel Quality Information). This CQI is used by the BS for link adaptation to the scheduled users. When Base Stations change their precoders in the next scheduling epoch, interference levels and therefore CQI estimates made previously may no longer be accurate, leading to reduction in system throughput. In this paper, we discuss the benefits of using unitary precoders to reduce this mismatch in CQI and thus improve system performance.","PeriodicalId":158295,"journal":{"name":"2011 National Conference on Communications (NCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123799221","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}
引用次数: 0
Significance of speaker information in wideband speech 宽带语音中说话人信息的意义
2011 National Conference on Communications (NCC) Pub Date : 2011-03-17 DOI: 10.1109/NCC.2011.5734710
G. Pradhan, S. R. Mahadeva Prasanna
{"title":"Significance of speaker information in wideband speech","authors":"G. Pradhan, S. R. Mahadeva Prasanna","doi":"10.1109/NCC.2011.5734710","DOIUrl":"https://doi.org/10.1109/NCC.2011.5734710","url":null,"abstract":"In this work, speech signal having information up to 4 kHz is termed as narrowband (NB) speech and the other having information up to 8 kHz is termed as wideband (WB) speech. The objective is to demonstrate the significance of speaker information present in the WB speech. A speaker verification (SV) system is developed using the mel-frequency cepstral coefficients (MFCCs) computed from the WB speech and modeled using Gaussian mixture models (GMM). For comparison, a SV system is also developed from the corresponding NB speech. The experimental results show that the SV performance improves for WB speech and the improvement is significant under degraded conditions. Further, the performance improvement is better for female speakers.","PeriodicalId":158295,"journal":{"name":"2011 National Conference on Communications (NCC)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126902196","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}
引用次数: 6
Comparison of features extracted using time-frequency and frequency-time analysis approach for text-independent speaker identification 基于时频分析和频时分析的独立文本说话人识别特征比较
2011 National Conference on Communications (NCC) Pub Date : 2011-03-17 DOI: 10.1109/NCC.2011.5734720
Nirmalya Sen, T. Basu, S. Chakroborty
{"title":"Comparison of features extracted using time-frequency and frequency-time analysis approach for text-independent speaker identification","authors":"Nirmalya Sen, T. Basu, S. Chakroborty","doi":"10.1109/NCC.2011.5734720","DOIUrl":"https://doi.org/10.1109/NCC.2011.5734720","url":null,"abstract":"This paper compares the feature sets extracted using time-frequency analysis approach and frequency-time analysis approach for text-independent speaker identification. Mel-frequency cepstral coefficient (MFCC) feature set and Inverted Mel-frequency cepstral coefficient (IMFCC) feature set are extracted using time-frequency analysis approach. Temporal energy subband cepstral coefficient (TESBCC) feature set is extracted using frequency time analysis approach. Time-bandwidth product of MFCC filter bank and TESBCC filter bank has been compared. RV coefficient has been used to calculate the correlation between the feature sets. Experimental evaluation was conducted on POLYCOST database with 130 speakers using Gaussian mixture speaker model. The TESBCC feature set has 9.5% higher average accuracy compared to the MFCC feature set. It is found that, the feature set extracted using time-frequency analysis approach is practically uncorrelated with the feature set extracted using frequency-time analysis approach. It is also demonstrated that IMFCC feature set has important role in fusion.","PeriodicalId":158295,"journal":{"name":"2011 National Conference on Communications (NCC)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124147670","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}
引用次数: 3
A Vertical Handoff decision scheme for end-to-end QoS in heterogeneous networks: An implementation on a mobile IP testbed 异构网络中端到端QoS的垂直切换决策方案:在移动IP测试平台上的实现
2011 National Conference on Communications (NCC) Pub Date : 2011-03-17 DOI: 10.1109/NCC.2011.5734759
M. Rafiq, S. Kumar, N. Kammar, G. Prasad, G. K. Garge, S. Anand, M. Hegde
{"title":"A Vertical Handoff decision scheme for end-to-end QoS in heterogeneous networks: An implementation on a mobile IP testbed","authors":"M. Rafiq, S. Kumar, N. Kammar, G. Prasad, G. K. Garge, S. Anand, M. Hegde","doi":"10.1109/NCC.2011.5734759","DOIUrl":"https://doi.org/10.1109/NCC.2011.5734759","url":null,"abstract":"A prominent function of a mobile host is seamless Vertical Handoff (VHO) that ensures application service continuity and quality. VHO decision algorithms that have been proposed in the literature consider parameters such as wireless channel quality (RSSI), cost, channel load, and available bandwidth. The mobile node runs the VHO algorithm autonomously and makes the decision. We highlight the fact that such a local decision can potentially result in a poor end-to-end application level QoS. We present a VHO scheme that takes into account end-to-end QoS as one of the key parameters in addition to other common parameters. We propose an architecture involving an external host based light-weight server (Access Link Utilization Monitor) that disseminates the available end-to-end bandwidth to the mobile node to assist it in making a decision to maintain end-to-end service quality. We describe a fuzzy logic based algorithm that has been used in the handoff decision. We present the results of our implementation on a mobile IP testbed under different realistic scenarios, that include WLAN, WiMAX and 3G access technologies to demonstrate the efficacy of the proposed scheme.","PeriodicalId":158295,"journal":{"name":"2011 National Conference on Communications (NCC)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125709013","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}
引用次数: 9
Bimodal biometric person authentication using speech and face under degraded condition 退化条件下基于语音和面部的双峰生物识别身份验证
2011 National Conference on Communications (NCC) Pub Date : 2011-03-17 DOI: 10.1109/NCC.2011.5734743
S. K. Sahoo, S. Prasanna
{"title":"Bimodal biometric person authentication using speech and face under degraded condition","authors":"S. K. Sahoo, S. Prasanna","doi":"10.1109/NCC.2011.5734743","DOIUrl":"https://doi.org/10.1109/NCC.2011.5734743","url":null,"abstract":"In this work, we present a bimodal biometric system using speech and face features and tested its performance under degraded condition. Speaker verification (SV) system is built using Mel-Frequency Cepstral Coefficients (MFCC) followed by delta and delta-delta for feature extraction and Gaussian Mixture Model (GMM) for modeling. A face verification (FV) system is built using the combination of Principal Component Analysis (PCA) and Linear Discriminant Analysis (LDA). Sum rule is used for the fusion of the biometric scores. The performance of SV system under degraded condition is also checked. All the experimental results are shown upon a subset of IITG-DIT M4 multi-biometric database. The complementary information derived from the speech biometric at training stage is used to further decrease the FV error rate, which is termed as Cohort fed FV system. Finally we propose an improved bimodal person authentication system using SV and Cohort fed FV biometric systems.","PeriodicalId":158295,"journal":{"name":"2011 National Conference on Communications (NCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131194106","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}
引用次数: 11
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