2010 National Conference On Communications (NCC)最新文献_第5页

Outage performance of dual-hop opportunistic relaying compared to a single-hop SIMO under Rayleigh fading 瑞利衰落下双跳机会中继与单跳SIMO的中断性能比较

2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430225

H. Katiyar, R. Bhattacharjee

引用次数: 8

An improvement of Wang et al.'s authentication scheme using smart cards 对Wang等人的智能卡身份验证方案的改进

2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430153

S. Sood, A. Sarje, Kuldip Singh

引用次数: 25

A multilingual screen reader in Indian languages 印度语言的多语言屏幕阅读器

2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430191

E. V. Raghavendra, K. Prahallad

引用次数: 17

Optical modulation schemes for frequency-coded quantum key distribution 频率编码量子密钥分配的光调制方案

2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430155

Pradeep Kumar

引用次数: 6

Performance analysis of active handoff in CDMA2000 femtocells CDMA2000飞蜂窝主动切换性能分析

2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430219

Gauri Joshi, M. Yavuz, C. Patel

引用次数: 5

KL divergence based feature switching in the linguistic search space for automatic speech recognition 基于KL散度的语言搜索空间特征切换的自动语音识别

2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430186

J. Chaitanya, Rajesh Janakiraman, H. Murthy

{"title":"KL divergence based feature switching in the linguistic search space for automatic speech recognition","authors":"J. Chaitanya, Rajesh Janakiraman, H. Murthy","doi":"10.1109/NCC.2010.5430186","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430186","url":null,"abstract":"In this paper, we propose a novel idea for using two different feature streams in a continuous speech recognition system. Conventionally multiple feature streams are concatenated and HMMs trained to build triphone/syllable models. In this paper, instead of concatenation, we build separate subword HMMs for each of the feature streams during training. Also during training, the relevance of a feature stream to a particular sound is evaluated. During testing, hypotheses are generated by the language model. A greedy Kullback Leibler distance measure is used to determine the best feature at a particular instant, for the given hypotheses. There are two important aspects of this approach, namely, a) use of a feature that is relevant for recognizing a specific sound and b) the dimension of the feature stream does not increase with the number of different feature streams. To enable feature switching during recognition, a syllablebased automatically annotated recognition framework is used. In this framework, the test speech signal is first segmented into syllables, and, syllable boundaries are incorporated in the language model. Experiments are performed on three databases (a) Tamil DDNews database (b) TIMIT database (c) NTIMIT database, using, two features: MFCC (derived from the power spectrum of the speech signal) and MODGDF (derived from the phase spectrum of the speech signal). The results show that word error rate (WER) is lower than that of the use of joint features by almost 1.5% for the TIMIT database, by almost 3.4% for the NTIMIT database, by about 3.8% for the Tamil DDNew database.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125181442","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: 4

A low complexity active interference cancellation method for OFDM based cognitive radios 一种基于OFDM认知无线电的低复杂度有源干扰消除方法

2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430231

D. Rammoorthy, P. Pandian, S. Srikanth

引用次数: 2

Effect of jacobian compensation in linear transformation based VTLN under matched and mis-matched speaker conditions 扬声器匹配和不匹配条件下基于线性变换的VTLN中雅可比补偿的影响

2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430188

S. Rath, A. K. Sarkar, S. Umesh

引用次数: 1

Receiver-only optimized Vector Quantization for fading channels 衰落信道中仅接收机优化的矢量量化

2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430183

R. Sowmya, C. Murthy

{"title":"Receiver-only optimized Vector Quantization for fading channels","authors":"R. Sowmya, C. Murthy","doi":"10.1109/NCC.2010.5430183","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430183","url":null,"abstract":"This paper considers the design and analysis of a filter at the receiver of a source coding system to mitigate the excess distortion caused due to channel errors. The index output by the source encoder is sent over a fading discrete binary symmetric channel and the possibly incorrect received index is mapped to the corresponding codeword by a Vector Quantization (VQ) decoder at the receiver. The output of the VQ decoder is then processed by a receive filter to obtain an estimate of the source instantiation. The distortion performance is analyzed for weighted mean square error (WMSE) and the optimum receive filter that minimizes the expected distortion is derived for two different cases of fading. It is shown that the performance of the system with the receive filter is strictly better than that of a conventional VQ and the difference becomes more significant as the number of bits transmitted increases. Theoretical expressions for an upper and lower bound on the WMSE performance of the system with the receive filter and a Rayleigh flat fading channel are derived. The design of a receive filter in the presence of channel mismatch is also studied and it is shown that a minimax solution is the one obtained by designing the receive filter for the worst possible channel. Simulation results are presented to validate the theoretical expressions and illustrate the benefits of receive filtering.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122678828","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

Using polysyllabic units for text to speech synthesis in Indian languages 用多音节单位进行印度语的文本到语音合成

2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430193

M. V. Vinodh, Ashwin Bellur, K. Narayan, D. M. Thakare, A. Susan, N. M. Suthakar, H. Murthy

引用次数: 20