Pub Date : 2015-04-16DOI: 10.1109/NCC.2015.7084826
S. Deb, S. Dandapat
This work explores the effect of breathiness component on speech under stress. The breathiness component in a speech signal can be estimated using different features such as period perturbation quotient (PPQ), amplitude perturbation quotient (APQ), harmonic to noise ratio (HNR), glottal to noise excitation ratio (GNER), harmonic energy (HE), harmonic energy of residue (HER) and harmonic to signal ratio (HSR). Statistical analysis of these features shows that they have different mean and variance values for speech under stress. The performance of breathiness features is evaluated using Hidden Markov Model (HMM) for classification of speech under stress. The results show that the breathiness features successfully characterize the speech under stress. The performance of breathiness features is compared with the MFCC feature. Finally, a speech under stress classification method is proposed with the combination of breathiness and MFCC features. In terms of classification rates, the proposed combined feature outperforms the MFCC feature.
{"title":"A novel breathiness feature for analysis and classification of speech under stress","authors":"S. Deb, S. Dandapat","doi":"10.1109/NCC.2015.7084826","DOIUrl":"https://doi.org/10.1109/NCC.2015.7084826","url":null,"abstract":"This work explores the effect of breathiness component on speech under stress. The breathiness component in a speech signal can be estimated using different features such as period perturbation quotient (PPQ), amplitude perturbation quotient (APQ), harmonic to noise ratio (HNR), glottal to noise excitation ratio (GNER), harmonic energy (HE), harmonic energy of residue (HER) and harmonic to signal ratio (HSR). Statistical analysis of these features shows that they have different mean and variance values for speech under stress. The performance of breathiness features is evaluated using Hidden Markov Model (HMM) for classification of speech under stress. The results show that the breathiness features successfully characterize the speech under stress. The performance of breathiness features is compared with the MFCC feature. Finally, a speech under stress classification method is proposed with the combination of breathiness and MFCC features. In terms of classification rates, the proposed combined feature outperforms the MFCC feature.","PeriodicalId":302718,"journal":{"name":"2015 Twenty First National Conference on Communications (NCC)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124566974","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 : 2015-04-16DOI: 10.1109/NCC.2015.7084888
Karra Chinmay Dheeraj, A. Thangaraj, R. Ganti
An ideal full-duplex relay doubles the achievable data rate compared to a half-duplex relay. However, in practice, the self-interference and processing delay induces an ISI channel between the source and the destination nodes. In this paper, we study the outage performance of a full-duplex relaying network with amplify-and-forward scheme. In contrast to prior work, we include the direct link from the source to destination, and analyze the distribution of the end-to-end signal-to-noise ratio (SNR) with the minimum mean squared error decision feedback equalizer. We observe that the direct link provides a significant SNR gain, and including it is particularly important for self-interference combating at the receiver.
{"title":"Equalization in amplify-forward full-duplex relay with direct link","authors":"Karra Chinmay Dheeraj, A. Thangaraj, R. Ganti","doi":"10.1109/NCC.2015.7084888","DOIUrl":"https://doi.org/10.1109/NCC.2015.7084888","url":null,"abstract":"An ideal full-duplex relay doubles the achievable data rate compared to a half-duplex relay. However, in practice, the self-interference and processing delay induces an ISI channel between the source and the destination nodes. In this paper, we study the outage performance of a full-duplex relaying network with amplify-and-forward scheme. In contrast to prior work, we include the direct link from the source to destination, and analyze the distribution of the end-to-end signal-to-noise ratio (SNR) with the minimum mean squared error decision feedback equalizer. We observe that the direct link provides a significant SNR gain, and including it is particularly important for self-interference combating at the receiver.","PeriodicalId":302718,"journal":{"name":"2015 Twenty First National Conference on Communications (NCC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124098941","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 : 2015-04-16DOI: 10.1109/NCC.2015.7084872
Ashwani Sharma, I. Zuazola, J. Batchelor, A. Perallos
Non-uniformly Distributed-Turns Coil (NDTC) antennas are specifically arranged to widespread the overall reactive field in multipurpose near-field applications e.g., the reading/interrogating and wireless power transfer (charging mats), while permitting their inherent robust H-field using earlier reported NDTC antennas to form the array. The proposed array consists of five NDTC antennas cautiously arranged and will be shown to optimally widespread the effective area of the antenna by 4.3 times. Simulated results are provided and corroborate the widespreading of the reactive field with robust H-field at HF 13.56MHz. A further widening of the reactive field in principle can be obtained using more NDTC antenna elements.
{"title":"Widespread near-field with robust H-field using NDTC antennas in multipurpose applications","authors":"Ashwani Sharma, I. Zuazola, J. Batchelor, A. Perallos","doi":"10.1109/NCC.2015.7084872","DOIUrl":"https://doi.org/10.1109/NCC.2015.7084872","url":null,"abstract":"Non-uniformly Distributed-Turns Coil (NDTC) antennas are specifically arranged to widespread the overall reactive field in multipurpose near-field applications e.g., the reading/interrogating and wireless power transfer (charging mats), while permitting their inherent robust H-field using earlier reported NDTC antennas to form the array. The proposed array consists of five NDTC antennas cautiously arranged and will be shown to optimally widespread the effective area of the antenna by 4.3 times. Simulated results are provided and corroborate the widespreading of the reactive field with robust H-field at HF 13.56MHz. A further widening of the reactive field in principle can be obtained using more NDTC antenna elements.","PeriodicalId":302718,"journal":{"name":"2015 Twenty First National Conference on Communications (NCC)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120919983","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 : 2015-04-16DOI: 10.1109/NCC.2015.7084922
Karuna Kumar, Archit Gupta, Rushabh Shah, A. Karandikar, P. Chaporkar
Recent proliferation of mobile devices and high market demand have pushed power consumption of cellular networks to high levels in India. At the same time, the marginal gains to telecom operators for providing services have dwindled. Thus, a gap is slowly building up in the demand and supply of telecom services. The effect is adverse in urban areas where the demand for throughput and other load handling capabilities are high. While the base stations are setup to meet the peak quality of service (QoS) demands, vast opportunities exist to save operational and energy cost when loads are low. For the traffic patterns of one of India's leading telecom service providers, we show that such cost saving opportunities do exist in a systematic fashion and can be tapped to lower the operational cost. We further show that these opportunities can be predicted reliably and discuss a possible scheme to cut down on both energy and operational cost.
{"title":"On analyzing Indian cellular traffic characteristics for energy efficient network operation","authors":"Karuna Kumar, Archit Gupta, Rushabh Shah, A. Karandikar, P. Chaporkar","doi":"10.1109/NCC.2015.7084922","DOIUrl":"https://doi.org/10.1109/NCC.2015.7084922","url":null,"abstract":"Recent proliferation of mobile devices and high market demand have pushed power consumption of cellular networks to high levels in India. At the same time, the marginal gains to telecom operators for providing services have dwindled. Thus, a gap is slowly building up in the demand and supply of telecom services. The effect is adverse in urban areas where the demand for throughput and other load handling capabilities are high. While the base stations are setup to meet the peak quality of service (QoS) demands, vast opportunities exist to save operational and energy cost when loads are low. For the traffic patterns of one of India's leading telecom service providers, we show that such cost saving opportunities do exist in a systematic fashion and can be tapped to lower the operational cost. We further show that these opportunities can be predicted reliably and discuss a possible scheme to cut down on both energy and operational cost.","PeriodicalId":302718,"journal":{"name":"2015 Twenty First National Conference on Communications (NCC)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131646852","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 : 2015-04-16DOI: 10.1109/NCC.2015.7084870
Pranab Basu, N. Kashyap
Subspace codes are subsets of the projective space Pq(n), which is the set of all subspaces of the vector space Fqn. Koetter and Kschischang argued that subspace codes are useful for error and erasure correction in random network coding. Linearity in subspace codes was defined by Braun, Etzion and Vardy, and they conjectured that the largest cardinality of a linear subspace code in Pq(n) is 2n. In this paper, we show that the conjecture holds for linear subspace codes that are closed under intersection, i.e., codes having the property that the intersection of any pair of codewords is also a codeword. The proof is via a characterization of such codes in terms of partitions of linearly independent subsets of Fqn.
{"title":"On linear subspace codes closed under intersection","authors":"Pranab Basu, N. Kashyap","doi":"10.1109/NCC.2015.7084870","DOIUrl":"https://doi.org/10.1109/NCC.2015.7084870","url":null,"abstract":"Subspace codes are subsets of the projective space Pq(n), which is the set of all subspaces of the vector space Fqn. Koetter and Kschischang argued that subspace codes are useful for error and erasure correction in random network coding. Linearity in subspace codes was defined by Braun, Etzion and Vardy, and they conjectured that the largest cardinality of a linear subspace code in Pq(n) is 2n. In this paper, we show that the conjecture holds for linear subspace codes that are closed under intersection, i.e., codes having the property that the intersection of any pair of codewords is also a codeword. The proof is via a characterization of such codes in terms of partitions of linearly independent subsets of Fqn.","PeriodicalId":302718,"journal":{"name":"2015 Twenty First National Conference on Communications (NCC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127006317","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 : 2015-04-16DOI: 10.1109/NCC.2015.7084931
Abhijit Pradhan, A. Prakash, S. Shanmugam, G. Kasthuri, R. Krishnan, H. Murthy
In this paper, new efforts to build text-to-speech synthesis systems (TTS) for Indian languages is presented. The synthesisers are built around both concatenative speech synthesis and statistical parametric speech synthesis frameworks. Text to speech synthesis systems require accurate segmentation. Obtaining accurate segmentation at the phone-level is a difficult task. Manual segmentation leads to human errors, while automatic segmentation using statistical approaches (hidden Markov model based approaches) leads to poor boundary information, when the amount of data used for training is small. A group delay based syllable segmentation semi-automatic tool is discussed. The tool is semi-automatic as some of the boundaries obtained are inaccurate and have to be manually corrected. Next, a segmentation algorithm that uses both HMM based segmentation and group delay based segmentation, is used to obtain accurate boundaries automatically. The boundaries obtained are used in the syllable-based synthesiser for unit selection. In the statistical phone-based synthesiser, embedded reestimation is performed at the phone level. Syllable-based and penta-phone based HMMs are used for building the synthesiser. TTS systems for 12 different Indian languages namely Tamil, Hindi, Marathi, Malayalam, Telugu, Rajasthani, Bengali, Odia, Assamese, Manipuri, Kannada and Gujarati are built using semi-automatic segmentation and synthesisers have been built for 7 Indian languages using automatic segmentation. Evaluation of the semi-automatic segmentation systems indicate that the MOS (mean opinion score) is above 3.0 for most of the languages. Pair comparison tests on semi-automatic vs. automatic segmentation show that automatic segmentation is preferred.
{"title":"Building speech synthesis systems for Indian languages","authors":"Abhijit Pradhan, A. Prakash, S. Shanmugam, G. Kasthuri, R. Krishnan, H. Murthy","doi":"10.1109/NCC.2015.7084931","DOIUrl":"https://doi.org/10.1109/NCC.2015.7084931","url":null,"abstract":"In this paper, new efforts to build text-to-speech synthesis systems (TTS) for Indian languages is presented. The synthesisers are built around both concatenative speech synthesis and statistical parametric speech synthesis frameworks. Text to speech synthesis systems require accurate segmentation. Obtaining accurate segmentation at the phone-level is a difficult task. Manual segmentation leads to human errors, while automatic segmentation using statistical approaches (hidden Markov model based approaches) leads to poor boundary information, when the amount of data used for training is small. A group delay based syllable segmentation semi-automatic tool is discussed. The tool is semi-automatic as some of the boundaries obtained are inaccurate and have to be manually corrected. Next, a segmentation algorithm that uses both HMM based segmentation and group delay based segmentation, is used to obtain accurate boundaries automatically. The boundaries obtained are used in the syllable-based synthesiser for unit selection. In the statistical phone-based synthesiser, embedded reestimation is performed at the phone level. Syllable-based and penta-phone based HMMs are used for building the synthesiser. TTS systems for 12 different Indian languages namely Tamil, Hindi, Marathi, Malayalam, Telugu, Rajasthani, Bengali, Odia, Assamese, Manipuri, Kannada and Gujarati are built using semi-automatic segmentation and synthesisers have been built for 7 Indian languages using automatic segmentation. Evaluation of the semi-automatic segmentation systems indicate that the MOS (mean opinion score) is above 3.0 for most of the languages. Pair comparison tests on semi-automatic vs. automatic segmentation show that automatic segmentation is preferred.","PeriodicalId":302718,"journal":{"name":"2015 Twenty First National Conference on Communications (NCC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116964763","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 : 2015-04-16DOI: 10.1109/NCC.2015.7084816
Devkinandan Chaurasiya, Somak Bhattacharyya, Saptarshi Ghosh, Praneeth Munaga, K. V. Srivastava
An ultra-thin triple band polarization-insensitive metamaterial absorber has been presented in this paper. The unit cell of the proposed structure consists of three concentric rings in the top layer of metal-backed dielectric substrate. The simulated result shows that the proposed structure has triple band absorptivity response lying in C band. The structure exhibits polarization-insensitive behavior under normal incidence due to four-fold symmetry. It also shows high absorption under oblique incidence upto 60° for both TE polarization (above 75%) and TM polarization (above 90%), thus validating the wide angle characteristics. The absorption mechanism is explained through illustrating the electric and magnetic field along with the surface current distribution. The proposed structure has been fabricated and measured, which shows good agreement with simulated response, thus verifying the polarization-insensitivity and wide angle characteristics.
{"title":"An ultra-thin triple band polarization-insensitive metamaterial absorber for C-band applications","authors":"Devkinandan Chaurasiya, Somak Bhattacharyya, Saptarshi Ghosh, Praneeth Munaga, K. V. Srivastava","doi":"10.1109/NCC.2015.7084816","DOIUrl":"https://doi.org/10.1109/NCC.2015.7084816","url":null,"abstract":"An ultra-thin triple band polarization-insensitive metamaterial absorber has been presented in this paper. The unit cell of the proposed structure consists of three concentric rings in the top layer of metal-backed dielectric substrate. The simulated result shows that the proposed structure has triple band absorptivity response lying in C band. The structure exhibits polarization-insensitive behavior under normal incidence due to four-fold symmetry. It also shows high absorption under oblique incidence upto 60° for both TE polarization (above 75%) and TM polarization (above 90%), thus validating the wide angle characteristics. The absorption mechanism is explained through illustrating the electric and magnetic field along with the surface current distribution. The proposed structure has been fabricated and measured, which shows good agreement with simulated response, thus verifying the polarization-insensitivity and wide angle characteristics.","PeriodicalId":302718,"journal":{"name":"2015 Twenty First National Conference on Communications (NCC)","volume":"167 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122981696","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 : 2015-04-16DOI: 10.1109/NCC.2015.7084843
Features Venkatanath, Praneeth, Maruthi Chandrasekhar Bh., Sumohana S. Channappayya, S. Medasani
This paper proposes a novel no-reference Perception-based Image Quality Evaluator (PIQUE) for real-world imagery. A majority of the existing methods for blind image quality assessment rely on opinion-based supervised learning for quality score prediction. Unlike these methods, we propose an opinion unaware methodology that attempts to quantify distortion without the need for any training data. Our method relies on extracting local features for predicting quality. Additionally, to mimic human behavior, we estimate quality only from perceptually significant spatial regions. Further, the choice of our features enables us to generate a fine-grained block level distortion map. Our algorithm is competitive with the state-of-the-art based on evaluation over several popular datasets including LIVE IQA, TID & CSIQ. Finally, our algorithm has low computational complexity despite working at the block-level.
{"title":"Blind image quality evaluation using perception based features","authors":"Features Venkatanath, Praneeth, Maruthi Chandrasekhar Bh., Sumohana S. Channappayya, S. Medasani","doi":"10.1109/NCC.2015.7084843","DOIUrl":"https://doi.org/10.1109/NCC.2015.7084843","url":null,"abstract":"This paper proposes a novel no-reference Perception-based Image Quality Evaluator (PIQUE) for real-world imagery. A majority of the existing methods for blind image quality assessment rely on opinion-based supervised learning for quality score prediction. Unlike these methods, we propose an opinion unaware methodology that attempts to quantify distortion without the need for any training data. Our method relies on extracting local features for predicting quality. Additionally, to mimic human behavior, we estimate quality only from perceptually significant spatial regions. Further, the choice of our features enables us to generate a fine-grained block level distortion map. Our algorithm is competitive with the state-of-the-art based on evaluation over several popular datasets including LIVE IQA, TID & CSIQ. Finally, our algorithm has low computational complexity despite working at the block-level.","PeriodicalId":302718,"journal":{"name":"2015 Twenty First National Conference on Communications (NCC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128292921","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 : 2015-04-16DOI: 10.1109/NCC.2015.7084846
Rohan Kumar Das, D. Pati, S. Prasanna
Limited data speaker verification has shown its significance in practical system oriented applications. The paper shows the importance of different aspects of voice source feature for limited test data scenario. A baseline speaker verification system using conventional mel frequency cepstral co-efficients (MFCC) feature is developed and performance under limited test data condition (≤10 s) is evaluated. A parallel system based on source feature mel power difference of spectrum in subband (M-PDSS) is developed in the i-vector based speaker verification framework. Both the systems were fused at the score level for the cases of short segments of test speech, which demonstrated the importance of source feature with reduction in test data duration. A comparative study of the M-PDSS feature is then made with our earlier work using discrete cosine transform of the integrated linear prediction residual (DCTILPR) feature and then fusion of two source features M-PDSS and DCTILPR along with MFCC features is carried out. An absolute improvement of 5.19% is obtained for 2 s of test data which conveys the significance of multiple source information under limited data speaker verification as it carries different aspects of source information.
{"title":"Different aspects of source information for limited data speaker verification","authors":"Rohan Kumar Das, D. Pati, S. Prasanna","doi":"10.1109/NCC.2015.7084846","DOIUrl":"https://doi.org/10.1109/NCC.2015.7084846","url":null,"abstract":"Limited data speaker verification has shown its significance in practical system oriented applications. The paper shows the importance of different aspects of voice source feature for limited test data scenario. A baseline speaker verification system using conventional mel frequency cepstral co-efficients (MFCC) feature is developed and performance under limited test data condition (≤10 s) is evaluated. A parallel system based on source feature mel power difference of spectrum in subband (M-PDSS) is developed in the i-vector based speaker verification framework. Both the systems were fused at the score level for the cases of short segments of test speech, which demonstrated the importance of source feature with reduction in test data duration. A comparative study of the M-PDSS feature is then made with our earlier work using discrete cosine transform of the integrated linear prediction residual (DCTILPR) feature and then fusion of two source features M-PDSS and DCTILPR along with MFCC features is carried out. An absolute improvement of 5.19% is obtained for 2 s of test data which conveys the significance of multiple source information under limited data speaker verification as it carries different aspects of source information.","PeriodicalId":302718,"journal":{"name":"2015 Twenty First National Conference on Communications (NCC)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132582712","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 : 2015-04-16DOI: 10.1109/NCC.2015.7084905
Mayur Jagtap, P. Rao
In degraded listening conditions, speakers are known to adapt their speech via the Lombard reflex to make it more comprehensible. This characteristic has been used in previous work to modify speech recorded in quiet before it is rendered in a noisy environment. The spectral modifications used have been found to be effective in low-pass noise such as babble noise. In this work, we investigate intelligibility enhancement of speech in completely different noise characteristics, namely aircraft noise, with its dominant high-frequency components. Natural Lombard speech elicited in aircraft noise was observed to be spectrally similar to Lombard speech in babble noise and showed no intelligibility benefit in a listening test in the presence of aircraft noise. Synthetic modifications using a data dependent optimization based on a perceptual measure are investigated to obtain intelligibility enhancement in aircraft noise.
{"title":"Enhancing speech intelligibility based on noise characteristics","authors":"Mayur Jagtap, P. Rao","doi":"10.1109/NCC.2015.7084905","DOIUrl":"https://doi.org/10.1109/NCC.2015.7084905","url":null,"abstract":"In degraded listening conditions, speakers are known to adapt their speech via the Lombard reflex to make it more comprehensible. This characteristic has been used in previous work to modify speech recorded in quiet before it is rendered in a noisy environment. The spectral modifications used have been found to be effective in low-pass noise such as babble noise. In this work, we investigate intelligibility enhancement of speech in completely different noise characteristics, namely aircraft noise, with its dominant high-frequency components. Natural Lombard speech elicited in aircraft noise was observed to be spectrally similar to Lombard speech in babble noise and showed no intelligibility benefit in a listening test in the presence of aircraft noise. Synthetic modifications using a data dependent optimization based on a perceptual measure are investigated to obtain intelligibility enhancement in aircraft noise.","PeriodicalId":302718,"journal":{"name":"2015 Twenty First National Conference on Communications (NCC)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115175207","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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