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Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing最新文献

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Designing FIR digital transport processors using simple spectral transformations 利用简单的频谱变换设计FIR数字传输处理器
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48335
P. Stubberud
{"title":"Designing FIR digital transport processors using simple spectral transformations","authors":"P. Stubberud","doi":"10.1109/PACRIM.1989.48335","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48335","url":null,"abstract":"Filters synthesized with only delays, adders, and subtracters, called transport processors, are discussed. Typically, transport processor design techniques utilize parallel and cascaded subfilters in order to meet required frequency specifications. A standard procedure for designing linear-phase FIR filters is to design a lowpass linear phase filter with a desirable frequency response characteristic and then transform that filter into a highpass, bandpass, or band reject filter by using simple spectral transformations.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126803458","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
Multidimensional reflected wave digital filters 多维反射波数字滤波器
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48358
Zheng Zhou, Zemin Liu
{"title":"Multidimensional reflected wave digital filters","authors":"Zheng Zhou, Zemin Liu","doi":"10.1109/PACRIM.1989.48358","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48358","url":null,"abstract":"A method for designing multidimensional wave digital filters is presented in terms of nonreciprocal circulators, the principle of reflected filters, and the theory of one-dimensional general parameter filters, with complex attenuation poles. Both attenuation and group delay responses are considered in the approximation in order to derive its wave digital realization by linear transformation. An example of designing a two-dimensional reference filter is given, and its two-dimensional wave digital realization is derived as well.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"28 1-2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127052919","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
Comparison of the Motorola DSP56000 and the Texas Instruments TMS320C25 digital signal processors for implementing a four error correcting (127,99) BCH error control code decoder 摩托罗拉DSP56000和德州仪器TMS320C25数字信号处理器实现四纠错(127,99)BCH错控码解码器的比较
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48373
W. Weeks, W. Little, V. Bhargava, T. Gulliver
{"title":"Comparison of the Motorola DSP56000 and the Texas Instruments TMS320C25 digital signal processors for implementing a four error correcting (127,99) BCH error control code decoder","authors":"W. Weeks, W. Little, V. Bhargava, T. Gulliver","doi":"10.1109/PACRIM.1989.48373","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48373","url":null,"abstract":"The Motorola DSP56000 and the Texas Instruments TMS320C25 digital signal processors are compared on the basis of their use in implementing a four error correcting (127,99) BCH code decoder. The code is being used as a basis for comparing various decoder implementations. Algorithms for efficient microprocessor implementations of a decoder are presented. The ability to implement time-critical steps in these algorithms is the basis for comparing the DSP56000 and the TMS320C25. The DSP56000's comparatively general-purpose architecture and certain unique features provide a higher bit rate decoder than can be implemented on the TMS320C25. Assembly language programs have been written and tested for performance and timing using IBM PC-based simulators of the processors. A complete decoder has been implemented on the DSP56000, achieving an average bit rate in excess of 1 million b/s.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131615978","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
Voice/data transmission in packet form: a study of delay performances 分组形式的语音/数据传输:延迟性能的研究
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48343
F. Brochin, J. Thomas
{"title":"Voice/data transmission in packet form: a study of delay performances","authors":"F. Brochin, J. Thomas","doi":"10.1109/PACRIM.1989.48343","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48343","url":null,"abstract":"Methods corresponding to two types of service discipline are presented for the computation of the probability distribution function of the queue length in a statistical multiplexer in the presence of a mixed voice/data traffic. The model chosen for the description of the speech patterns on the voice lines was a three-state Markov chain model, yielding hyperexponentially distributed silence periods and exponentially distributed active periods. Although the computations involved in these methods were quite important (due to the use of matrices whose numbers of elements were growing as a function of the fourth power of the number of vice sources), they presented no technical difficulties and could be carried out for the desired sets of parameters. The results obtained for different values of the parameters corresponded to what was expected.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122244569","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
Speech quality assessment using expert pattern recognition 基于专家模式识别的语音质量评估
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48340
R. Kubichek, E. Quincy, Kevin L. Kiser
{"title":"Speech quality assessment using expert pattern recognition","authors":"R. Kubichek, E. Quincy, Kevin L. Kiser","doi":"10.1109/PACRIM.1989.48340","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48340","url":null,"abstract":"A technique is described for processing objective parameters to obtain voice quality assessment. The method combines statistical pattern recognition (SPR) techniques with a knowledge-based expert system. The SPR module uses optimally selected voice parameters to form a purely statistical assessment of voice quality. Output includes a classification of the most likely opinion score, a prediction of mean opinion score, and the predicted opinion score frequencies. An expert system is being developed to combine these results with additional knowledge bases to account for factors, such as delay, that are not accounted for by the SPR system.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123104760","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: 10
Interaction between device technologies and computer communication networks circuits 设备技术与计算机通信网络电路之间的相互作用
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48322
M. Deen, R. Hardy, S. Stapleton, R. Fortier
{"title":"Interaction between device technologies and computer communication networks circuits","authors":"M. Deen, R. Hardy, S. Stapleton, R. Fortier","doi":"10.1109/PACRIM.1989.48322","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48322","url":null,"abstract":"The interactions between high-speed solid-state devices and computer communication networks and circuits are discussed, and it shown that the performances of these circuits are critically dependent on those of the devices. The implementation with three different technologies of the digital XOR phase detector, a crucial element in PLL clock recovery circuits, was investigated in detail. From MSPICE simulations, it was found that the GaAs-based phase detector has superior speed, reduced logic voltage levels, reduced noise margins, and higher power dissipation compared to the CMOS implementation. The ECL XOR circuit can operate at higher frequencies, but it also has reduced logic levels and the highest power dissipation compared to either the CMOS or GaAs XOR gate. Since both ECL and GaAs circuits use nonconventional voltage levels, with the resulting nonconventional input and output logic voltages, appropriate modifications in the interface circuit with the other computer communications networks are needed.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"10 13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125761929","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
VLSI design in heuristic environment 启发式环境下的VLSI设计
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48308
B. Kaminska, F. Mheir-El-Saadi
{"title":"VLSI design in heuristic environment","authors":"B. Kaminska, F. Mheir-El-Saadi","doi":"10.1109/PACRIM.1989.48308","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48308","url":null,"abstract":"Improvement in the system design process by embedding performance analysis based on heuristics is discussed. The heuristic models are used to guide the design process and help reduce the number iterations required to make a design match its specifications. Hierarchical composition is used to propagate the performance measures of any abstraction level on a bottom-up basis. An example is given for the delay performance measure of MOS VLSI systems. Experimental results for this delay prediction tool show a speedup of many orders of magnitude over simulation on large circuits.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130800394","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
Multi-resolution shape description and recognition from 2-D silhouette based on tree representations of skeletons 基于树形表示的二维轮廓多分辨率形状描述与识别
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48365
H. Matsushita, Y. Mori, T. Inui
{"title":"Multi-resolution shape description and recognition from 2-D silhouette based on tree representations of skeletons","authors":"H. Matsushita, Y. Mori, T. Inui","doi":"10.1109/PACRIM.1989.48365","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48365","url":null,"abstract":"A shape description and recognition algorithm is proposed. The description algorithm generates a hierarchical structural description of shape automatically from a two-dimensional silhouette. The description is based on skeletons, which are very useful for describing nonrigid bodies such as animals. Moreover, this hierarchical description includes not only quantitative features at each resolution level, but also the relationship between hierarchical levels by describing a skeleton as a tree representation. An effective matching method is also proposed which can discriminate shapes hierarchically using a three-layered neural network learned by an error back-propagation rule.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132754076","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
Recognition of isolated words in Bulgarian, by means of HMM 用HMM识别保加利亚语孤立词
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48342
S. Hadjitodorov, B. Boyanov, B. Rahardjo
{"title":"Recognition of isolated words in Bulgarian, by means of HMM","authors":"S. Hadjitodorov, B. Boyanov, B. Rahardjo","doi":"10.1109/PACRIM.1989.48342","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48342","url":null,"abstract":"The problem of the recognition of Bulgarian words by means of HMM (hidden Markov models) is discussed. The speech signal was low-pass filtered up to 4 kHz, sampled at 10 kHz, and pushed directly into the computer's memory (IBM PC/XT). Unvoiced segments were separated, and the pitch period was evaluated. For every voiced and unvoiced segment 12 LPC (linear predictive coding) coefficients were computed. These segments were used as states q/sub i/ in HMM and their LPC coefficients-an acoustic vector y/sub t/. On the basis of the training set a HMM for every word was generated. A modified Bayesian decision rule is proposed. As a result, if the decision rule is satisfied, the classification is simple; otherwise, the classification is given in the form of ordered couples. The proposed approach shows higher accuracy and is appropriate for word, command and expression recognition.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134000464","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 new ARQ scheme with error-correcting expert system and its performance analysis 一种新的带纠错专家系统的ARQ方案及其性能分析
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48391
Q. Yang, V. Bhargava
{"title":"A new ARQ scheme with error-correcting expert system and its performance analysis","authors":"Q. Yang, V. Bhargava","doi":"10.1109/PACRIM.1989.48391","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48391","url":null,"abstract":"An experimental ARQ scheme is proposed that is based on the philosophy of utilizing the redundant information existing in real data for error correcting. Expert system ideas are introduced into the error-control system. The throughput efficiency and the time delay of the proposed scheme are analyzed. Numerical results are provided for typical satellite communications cases. It is found that the proposed scheme can be used as long as the predefined dictionary is available in both communication nodes.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"303 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132477257","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
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