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ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)最新文献

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Hybrid recognizers combining hidden Markov models and multilayer perceptron 隐马尔可夫模型与多层感知器的混合识别
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713107
J.A. Martins, F. Violaro
{"title":"Hybrid recognizers combining hidden Markov models and multilayer perceptron","authors":"J.A. Martins, F. Violaro","doi":"10.1109/ITS.1998.713107","DOIUrl":"https://doi.org/10.1109/ITS.1998.713107","url":null,"abstract":"This paper describes some approaches for hybrid recognizers combining hidden Markov models (HMM) and multilayer perceptrons (MLP). One of these approaches employs MLP as a post-processor for HMM while the other uses HMM to segment the speech signal for MLP. The performance of hybrid recognizers is compared with discrete HMM and multilayer perceptrons. All of the implemented recognizers were speaker-independent and a 50-word vocabulary spoken in Brazilian Portuguese was employed in their evaluation. The speech signal was parametrized using mel-frequency cepstrum coefficients, mel-frequency cepstrum coefficients with cepstral mean removal, energy and delta coefficients.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115384699","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
Detection of synchronisation errors for the G.728 decoder G.728解码器的同步错误检测
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.718436
A. Wachtler, R. Hoffmann
{"title":"Detection of synchronisation errors for the G.728 decoder","authors":"A. Wachtler, R. Hoffmann","doi":"10.1109/ITS.1998.718436","DOIUrl":"https://doi.org/10.1109/ITS.1998.718436","url":null,"abstract":"A new method for the fast detection of frame synchronisation errors inside the G.728 speech decoder is described. The proposed algorithm uses a priori knowledge about internal decoder parameters. The G.728 frame synchronisation fails, if an octet slip in the transmission system occurs. This error type causes a shift of the word boundaries in the G.728 data stream. The decoder produces in this case a loud and noisy output signal. The proposed algorithm can be implemented as an add-on in a regular G.728 decoder, without changing the standard operation of the codec. Three classification methods, the Euclidian distance classifier, McCulloch-Pitts network and feedforward neural network are compared with respect to their performance and complexity.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115878810","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
A realistic model for self-similar Ethernet LAN traffic in SimATM-an ATM network simulator: design and performance implications simat (ATM网络模拟器)中自相似以太网LAN流量的现实模型:设计和性能含义
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713144
E. L. Andrade Neto, A. Alberti, D. Arantes, L. Mendes
{"title":"A realistic model for self-similar Ethernet LAN traffic in SimATM-an ATM network simulator: design and performance implications","authors":"E. L. Andrade Neto, A. Alberti, D. Arantes, L. Mendes","doi":"10.1109/ITS.1998.713144","DOIUrl":"https://doi.org/10.1109/ITS.1998.713144","url":null,"abstract":"This paper presents a realistic model for Ethernet LAN traffic that takes into account the network constraints. The design of the model is presented along with a brief description of SimATM, an ATM network simulator developed at UNICAMP. The resulting self-similar model is compared with real network data from Bellcore Ethernet traffic measurements. Results of simulations with synthetic traffic traces are presented for a simple ATM network. These results clearly indicate that simple Poisson traffic models underestimate real network losses by several orders of magnitude.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124633157","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
Measuring acoustic responses with maximum-length sequences 用最大长度序列测量声学响应
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713133
P. Burt
{"title":"Measuring acoustic responses with maximum-length sequences","authors":"P. Burt","doi":"10.1109/ITS.1998.713133","DOIUrl":"https://doi.org/10.1109/ITS.1998.713133","url":null,"abstract":"In several signal processing applications, a discrete-time model of a signal path which comprises of a loudspeaker and a microphone may be desired. For instance, the model can be used to choose the number of coefficients of an adaptive filter. In this work, different methods of obtaining such a model are compared on the basis of their precision and computational complexity. Experimental results from the application of the different methods are also presented.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124648187","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: 5
Internetworking telephony, IP and ATM networks 互联电话、IP和ATM网络
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713127
M. Veeraraghavan
{"title":"Internetworking telephony, IP and ATM networks","authors":"M. Veeraraghavan","doi":"10.1109/ITS.1998.713127","DOIUrl":"https://doi.org/10.1109/ITS.1998.713127","url":null,"abstract":"This paper proposes a general internetworking principle applicable to internetworking any two networks. We apply this principle to the specific problem of internetworking ATM networks with the PSTN and IP networks. A proof-of-concept prototype implementation of the IP-ATM internetworking solution is also described.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"238 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128944140","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 new architectural concept of hierarchical routing scheme for IPv6 in future high-speed large global Internet 一种面向未来高速大型全球互联网的IPv6分层路由方案的新体系结构概念
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.718471
G. Kuo, Hai-chuan Cheng, K.-C. Shyu
{"title":"A new architectural concept of hierarchical routing scheme for IPv6 in future high-speed large global Internet","authors":"G. Kuo, Hai-chuan Cheng, K.-C. Shyu","doi":"10.1109/ITS.1998.718471","DOIUrl":"https://doi.org/10.1109/ITS.1998.718471","url":null,"abstract":"Currently, the TCP/IP-enabled global Internet is the most important topic in computer networking. IPv6 is the most influential issue in the near-future high-speed large global Internet. And, the routing schemes of IPv6 routers will play the key role in achieving the requirements of a high-speed large global Internet for creating multimedia-based universal PCS. The main purpose of this paper is to propose a new concept of a hierarchical routing scheme for improving the routing in IPv6. The first part of the paper conducts an analysis of IPv6-based Internet with its routing requirements. The second part proposes an architectural hierarchical routing concept in order to achieve better efficiency and performance in the future IPv6-based Internet. The last part proposes the improvement of RIPng by taking advantage of our proposed architecture to make the so-called HRIPng for accomplishing better results which can work systematically as an IGP in any size of AS and core-router AS.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"353 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131691299","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
Multimedia synchronization system for pre-orchestrated data communications 用于预先编排的数据通信的多媒体同步系统
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713130
R. Mussauer de Lima, O. Duarte
{"title":"Multimedia synchronization system for pre-orchestrated data communications","authors":"R. Mussauer de Lima, O. Duarte","doi":"10.1109/ITS.1998.713130","DOIUrl":"https://doi.org/10.1109/ITS.1998.713130","url":null,"abstract":"This work presents a multimedia synchronization system that supports real-time communication and presentation of pre-orchestrated data. The synchronization mechanisms and the developed multimedia synchronization service are based on the XOCPN (extended object composition Petri net) model. The paper describes aspects concerning the system implementation, including the implementation architecture and environment, the XOCPN data structures and the specialized modules related to the synchronization mechanism. The presented system provides a complete support to applications that communicate multimedia data and helps users to compose multimedia objects. The proposed implementation seems to be very efficient.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"54 1-2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120917897","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: 1
Improving the threshold of the minimum-norm frequency detection method 改进了最小范数频率检测方法的阈值
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713092
R. F. Colares, A. Lopes
{"title":"Improving the threshold of the minimum-norm frequency detection method","authors":"R. F. Colares, A. Lopes","doi":"10.1109/ITS.1998.713092","DOIUrl":"https://doi.org/10.1109/ITS.1998.713092","url":null,"abstract":"This work is concerned with the frequency estimation of sinusoidal signals at low signal-to-noise ratios (SNR) and high resolution, through the linear prediction (LP) minimum-norm-based method. The optimized LP coefficients lead to a polynomial whose zeros contain information about the frequencies. The study of the behavior of these zeros leads to a new strategy capable of lowering the threshold effect at low SNR. Simulations show that is possible to achieve better results than the maximum likelihood (ML) method without any significant additional effort.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115862374","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: 1
On the equivalence between propelinear and binary G-linear codes 线性码与二进制g -线性码的等价性
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.718449
M. Alves, J. R. Gerônimo, R. Palazzo, S. R. Costa, J. Interlando
{"title":"On the equivalence between propelinear and binary G-linear codes","authors":"M. Alves, J. R. Gerônimo, R. Palazzo, S. R. Costa, J. Interlando","doi":"10.1109/ITS.1998.718449","DOIUrl":"https://doi.org/10.1109/ITS.1998.718449","url":null,"abstract":"The main objective of this paper is to establish a relationship between propelinear codes and binary G-linear codes as defined in Costa et al., (1997). We show that every binary G-linear code is a propelinear code by showing that the group structure induced by either one of these codes is related to the semi-direct product.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121615807","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: 1
On bandwidth efficiency of BCM applied to non-square M-QAM BCM在非平方M-QAM中的带宽效率研究
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713081
Geraldo G. R. Gomes, R. Baldini Filho
{"title":"On bandwidth efficiency of BCM applied to non-square M-QAM","authors":"Geraldo G. R. Gomes, R. Baldini Filho","doi":"10.1109/ITS.1998.713081","DOIUrl":"https://doi.org/10.1109/ITS.1998.713081","url":null,"abstract":"The decoding complexity of block coded M-QAM can be reduced by reducing the dimensionality of the modulation constellation. The aim of this paper is to present a coding method that improves the performance in terms of asymptotic coding gain and bandwidth efficiency of BCM applied to M-QAM constellations, where M is an odd power 2.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114353596","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
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