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Generating emphasis from neutral speech using hierarchical perturbation model by decision tree and support vector machine

Generating emphasis from neutral speech using hierarchical p...

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International Conference on Audio, Language and Image Processing, ICALIP

作者： Fanbo Meng Zhiyong Wu Helen Meng Jia Jia Lianhong Cai Tsinghua National Laboratory for Information Science and Technology (TNList) Department of Computer Science and Technology Tsinghua University Beijing China Department of Systems Engineering and Engineering Management The Chinese University of Hong Kong Hong Kong China Tsinghua-CUHK Joint Research Center for Media Sciences Technologies and Systems Graduate School at Shenzhen Tsinghua University Shenzhen China Tsinghua University Beijing Beijing CN

In a computer-aided pronunciation training (CAPT) system, corrective feedback is desired to provide contrastive comparisons between user's and canonical pronunciations. This paper presents a hierarchical perturbation model to generate emphasis for English by modifying acoustic features of neutral speech to highlight such important speech segments. Synthesis of emphasis needs to be realized hierarchically at word, syllable and phone layers. A two-pass decision tree is constructed to cluster acoustic variations between emphatic and neutral speeches. The questions for decision tree construction are designed according to the above layers. The questions related to word and syllable layers are used to construct the main tree and then the questions related to phone layer are used to expand the leaves of main tree (deriving a set of subtrees). Support vector machines (SVMs) are used to predict acoustic variations for all the leaves of main tree (at word and syllable layers) and sub-trees (at phone layer). Experiments indicate that the proposed hierarchical perturbation model can generate emphatic speech with high quality for both naturalness and emphasis.

关键词： Speech Acoustics Decision trees Support vector machines Training Feature extraction Reactive power

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Detection and emphatic realization of contrastive word pairs for expressive text-to-speech synthesis

Detection and emphatic realization of contrastive word pairs...

引用

International Symposium on Chinese Spoken Language Processing

作者： Chunrong Li Zhiyong Wu Fanbo Meng Helen Meng Lianhong Cai Tsinghua-CUHK Joint Research Center for Media Sciences Technologies and Systems Graduate School at Shenzhen Tsinghua University Shenzhen China Tsinghua National Laboratory for Information Science and Technology (TNList) Department of Computer Science and Technology Tsinghua University Beijing China Department of Systems Engineering and Engineering Management Chinese University of Hong Kong Shatin New Territories Hong Kong China Tsinghua University Beijing Beijing CN

This paper addresses the problem of automatic detection of contrastive word pairs and their acoustic realization in emphasis for expressive text-to-speech (TTS) synthesis in English. Support vector machines (SVMs) have been used to automatically detect contrastive word pairs from lexical features, syntactic dependencies and semantic relations. A much better performance is achieved by adding accent ratio and word identity features. Hidden Markov model (HMM) based speech synthesis is then used to generate emphatic speeches by putting emphasis on the detected contrastive word pairs. Subjective experiments show that most of the listeners consider putting emphasis on contrastive word pairs is more acceptable than on non-contrastive word pairs. This indicates the importance of the accurate detection of contrastive word pairs.

关键词： Hidden Markov models Speech Feature extraction Semantics Speech synthesis Support vector machines Syntactics

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On Active Sensing methods for localization scenarios with range-based measurements

On Active Sensing methods for localization scenarios with ra...

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International Conference on Multisensor Fusion and Integration for Intelligent Systems (MFI)

作者： Justinas Trapnauskas Michailas Romanovas Lasse Klingbeil Ahmed Al-Jawad Martin Traechtler Yiannos Manoli Department of Computer Engineering Vilnius Gediminas Technical University Lithuania Hahn-Schickard-Gesellschaft e.V. Institute of Microsystems and Information Technology Villingen-Schwenningen Germany Institute of Geodesy and Geoinformation Rheinische Friedrich-Wilhelms-Universitaet Bonn Germany Fritz Huettinger Chair of Microelectronics Department of Microsystems Engineering (IMTEK) Albert-Ludwigs-Universitat Freiburg Germany

The work demonstrates how the methods of Active Sensing (AS), based on the theory of optimal experimental design, can be applied for a location estimation scenario. The simulated problem consists of several mobile and fixed nodes where each mobile unit is equipped with a gyroscope and an incremental path encoder and is capable to make a selective range measurement to one of several fixed anchors as well as to other moving tags. All available measurements are combined within a fusion filter, while the range measurements are selected with one of the AS methods in order to minimize the position uncertainty under the constraints of a maximum available measurement rate. Different AS strategies are incorporated into a recursive Bayesian estimation framework in the form of Extended Kalman and Particle Filters. The performance of the fusion algorithms augmented with the active sensing techniques is discussed for several scenarios with different measurement rates and a number of fixed or moving tags.

关键词： Uncertainty Time measurement Noise Covariance matrix Sensors Gyroscopes Measurement uncertainty

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Research on classification of apple level based on neural network

Research on classification of apple level based on neural ne...

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2011 Cross Strait Quad-Regional Radio Science and Wireless technology Conference, CSQRWC 2011

作者： Zhang, Genshan Duan, Liying Tian, Hong Guan, Huiming School of Literature and Media Transmission Shijiazhuang University Shijiazhuang China Department of Computer Shijiazhuang University Shijiazhuang China Department of Information Engineering Beijing University of Technology Tongzhou College Beijing China

ISBN: (纸本)9781424497904

For the shortage of artificial methods in classification of apple level, a method of classification of apple level based on BP artificial neural networks is presented. Artificial neural network provides technical means for research on apple classification,because it can provide nonlinear mapping of the input vector and output vector with arbitrary dimension, and also can reach any nonlinear continuous system. The BP neural network model is established for the classification by taking feature parameters as input vectors and apple level as output vectors. The results has shown that the classification precision of model is very high, and which has good application in realizing automatic identification of apple level. © 2011 IEEE.

关键词： Neural networks

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Gamification towards sustainable mobile application

Gamification towards sustainable mobile application

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2011 5th Malaysian Conference in Software engineering, MySEC 2011

作者： Law, Foong Li Kasirun, Zarinah Mohd Gan, Chun Kiat Department of Computing School of Computing Communication and Media Studies KDU University College 47400 Petaling Jaya Malaysia Department of Software Engineering Faculty of Computer Science and Information Technology University of Malaya 50603 Kuala Lumpur Malaysia

ISBN: (纸本)9781457715310

Gamification is not a newly emerging concept. Perhaps, it is a new term to some people. Gamification is a powerful new strategy to influence and motivate groups of people. It applies game mechanics to non-game activities to change the user's behavior of an application. It improves the engagement of user by keeping score of points earned through various activities on the application. The recent gamified websites or a related service such as Foursquare is a location-based application that pinpoints where you are and your activities. Users of the Foursquare can "check in" to various locations on their mobile phones and gain incentives like badges or deals. Gamification is utilised as a mean to build up user loyalty, and not so much to gain their long-term engagement. This article discusses how the gamification can help to drive the sustainability after a mobile application has been delivered and is in use. It is important to make mobile application continuously visible and sustainable if the concept of gamification has been used correctly. The more users can gain from the virtual and tangible rewards of using our application, the more we can be rewarded from our users. It also discusses how adding a "game layer" has improved the basic functions in society like educating people to become more responsible and helpful and use badges as virtual reward to users who contribute photos. Interactive mobile application designed to change the way of people report road accident cases with applying a simplicity and convenience principles. For instance, user just needs to snap photo and touch on screen to report a road accident case. © 2011 IEEE.

关键词： Roads and streets

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Dimensioning and site planning of integrated PON and wireless cooperative networks for fixed mobile convergence

Dimensioning and site planning of integrated PON and wireles...

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作者： Lin, Bin Tapolcai, János Ho, Pin-Han Department of Information Science and Technology Dalian Maritime University Dalian 116026 China Department of Telecommunication and Media Informatics Budapest University of Technology and Economics Budapest 1117 Hungary Department of Electrical and Computer Engineering University of Waterloo Waterloo ON N2L 3G1 Canada

Integrating optical and wireless broadband access networks is an important step in achieving fixed mobile convergence in metropolitan areas. In this paper, a promising network architecture by integrating a passive optical network and a wireless cooperative network is investigated, in which intercell cooperative transmission is incorporated. Our goal is to exploit both economic and performance benefits. To achieve a cost-effective deployment and meet long-term performance requirements, this paper addresses the issue of dimensioning and site planning (DSP). We provide a complete formulation to capture the challenges behind network deployment. A number of long-term design subjects are jointly considered in a unified optimization framework, including infrastructure placement, base station user allocation, and resource breakdown assignment. To reduce the computation complexity, the DSP problem is decomposed into two subproblems. An approach is further developed to reformulate the problem into a solvable mixed integer linear program. Moreover, we conduct case studies to validate the formulation, in which performance gains are demonstrated in terms of total infrastructure cost reduction, spectral efficiency improvement, and scalability in capacity enhancement. © 2011 IEEE.

关键词： Passive optical networks

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A high verification capacity reversible fragile watermarking scheme for 3D models

A high verification capacity reversible fragile watermarking...

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作者： Wang, Jen-Tse Yang, Ya-Wen Chang, Yung-Tsang Yu, Shyr-Shen Department of Digital Media Design Hsiuping Institute of Technology 11 Gungye Road Daily City Taichung 412 Taiwan Department of Computer Science and Engineering National Chung Hsing University 250 Kuo-Kuan Road Taichung 402 Taiwan Department of Information Networking Technology Hsiuping Institute of Technology 11 Gungye Road Daily City Taichung 412 Taiwan

The protection and authentication problems for three dimensional (3D) models have become more and more important. The capability of accurately verifying, locating, and recovering any tampered vertex is one of the most important issues. Published fragile watermarking 3D model schemes have a main drawback, the synchronization prob1cm. To increase the capacity of verification and overcome this drawback, a high verification capacity reversible fragile watermarking scheme for 3D models in the spatial domain is proposed in this paper. Initially, a reversible quantization index modulation embedding scheme employs the principal component analysis (PC'A) and modulates the distance from the vertex coordinate to the gravity center of the cover model. And, the spread spectrum technique is adopted to improve the robustness while obeying the sensitive fragility and low distortion requirements for watermarking 3D models. The proposed method can achieve that 100% vertices of the cover model can be watermarked, extracted and verified, while the other 3D fragile watermarking schemes can not. In the meanwhile, the synchronization problem is overcome. Moreover, the proposed method is immune to the causality and convergence problems. Finally, the proposed scheme is robust against vertex reordering and similarity transformation attacks. ICIC International © 2011 ISSN.

关键词： Principal component analysis

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Multi Class-based n-gram Language Model for NewWords Using Web Data

Multi Class-based n-gram Language Model for NewWords Using W...

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作者： Naptali, Welly Tsuchiya, Masatoshi Nakagawa, Seiichi Department of Computer Science and Engineering Toyohashi University of Technology 1-1 Hibarigaoka Tempaku-cho Toyohashi Aichi 441-8580 Japan Information and Media Center 1-1 Hibarigaoka Tempaku-cho Toyohashi Aichi 441-8580 Japan

ISBN: (纸本)9789604742837

Out-of-vocabulary (OOV) words cause a serious problem for automatic speech recognition (ASR) system. Not only it will be miss-recognized as an in-vocabulary word with similar phonetics, but the error will also affect nearby words to make errors. Language models (LMs) for most of open vocabulary ASR systems treat OOV words as one entity, ignoring the linguistic information. In this paper we present a class-based n-gram LM that is able to deal with the OOV words by treating each of them individually without retraining the whole LM parameters. OOV words are assigned to IV classes that consist of similar semantic meanings IV words. Word-wide-web is used as additional data that are required to find the relation of OOV words with the IV words. Experiments on Wall Street Journal show that the proposed method performs better than baselines in terms of adjusted perplexity.

关键词： Semantics

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Smart Border Routers for eHealthCare Wireless Sensor Networks

Smart Border Routers for eHealthCare Wireless Sensor Network...

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International Conference on Wireless Communications, Networking and Mobile Computing (WiCom)

作者： Wei Shen Youzhi Xu Donghua Xie Tingting Zhang Alf Johansson Information Technology and Media Department Mid Sweden University Sundsvall Sweden Computer and Electrical Engineering Department School of Engineering Jönköping University Jonkoping Sweden

With advances in low-power and low-cost wireless and sensor technologies, using WSNs in eHealthCare system has yielded tremendous efforts in recent years. However, most of previous researches adopt a remote server to process large scale of health sensor data forwarded by gateways that allow for interconnecting WSNs to IP network. In this paper, we present a prototype of a smart 6LoWPAN border router aimed to locally make decisions of health states using a Hidden Markov Model and enable wireless E-health care sensor network to seamlessly connect with IP network.

关键词： Wireless sensor networks Servers Senior citizens Databases Logic gates Delay IP networks

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Repeated sponsored search auction with non-decreasing bid values

Repeated sponsored search auction with non-decreasing bid va...

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International Conference on Consumer Electronics, Communications and Networks

作者： Chen-Kun Tsung Hann-Jang Ho Sing-Ling Lee Department of Computer Science and Information Engineering National Chung Cheng University Chiayi Taiwan Department of Applied Digital Media Wu Feng Institute of Technology Chiayi Taiwan

ISBN: (纸本)9781612844589

We apply ascending biding behavior of English auction to solve the revenue loss problem of generalized second price auction (GSP) in repeated sponsored search auction (SSA) for the search engine provider (SEP). The mechanism proposed in this paper is denoted by Non-decreasing Sponsored Search Auction (NDSSA). We focus on analyzing SEP's revenue lower bound and auction efficiency after converging. We proof that SEP's revenue in NDSSA is at least equal to α times of that in Vickrey-Clarke-Groves auction (VCG), while α is the reciprocal of the first click-through rate (CTR). Since any CTR is normalized to a decimal, SEP in NDSSA will obtain more revenue than in VCG. Moreover, NDSSA is efficient, and advertisers with higher valuations will be ranked in better slots.

关键词： Cost accounting Internet Convergence Advertising Nash equilibrium Electronic mail Economics

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