发布求助
文献互助 智能选刊 最新文献

IEEE International Conference on Communications, - Spanning the Universe.最新文献

筛选
英文 中文
High-performance ADPCM codec for voice and voiceband data and its application to DCME 语音和语音频带数据的高性能ADPCM编解码器及其在DCME中的应用
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13599
Y. Yatsuzuka, K. Hosoda, S. Iizuka, S. Kawaguchi, A. Shinbo
{"title":"High-performance ADPCM codec for voice and voiceband data and its application to DCME","authors":"Y. Yatsuzuka, K. Hosoda, S. Iizuka, S. Kawaguchi, A. Shinbo","doi":"10.1109/ICC.1988.13599","DOIUrl":"https://doi.org/10.1109/ICC.1988.13599","url":null,"abstract":"An advanced adaptive differential pulse-code modulation (ADPCM) technique applicable to digital circuit multiplication equipment (DCME) is described. The performance of the advanced ADPCM CMOS single-chip codec regarding voice and various high-speed modems is discussed. Major issues in DCME are also addressed. The speech quality of the 32 kb/s advanced ADPCM is equivalent to that of CCITT G.721 ADPCM and also provides better quality at 24 kb/s. The 32 kb/s advanced ADPCM can transmit V.29 modem signals at 9600 b/s over two asynchronous tandem links and V.32 modem signals over four asynchronous tandem links, respectively. Evaluation results indicate that at 40 kb/s, the advanced ADPCM again provides superior performance to the 40 kb/s G. 721-based ADPCM for V.33 modem at 14.4 kb/s. It is noted that an advanced ADPCM codec having a variable rate coding capability between 24 and 32 kb/s effectively can be applied to DCME allowing a higher gain and better speech quality to be achieved.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121134202","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
Centralized O&M functions in the evolution towards a DSN 集中运维功能向DSN演进
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13732
B. Panigas, M. Ghilotti
{"title":"Centralized O&M functions in the evolution towards a DSN","authors":"B. Panigas, M. Ghilotti","doi":"10.1109/ICC.1988.13732","DOIUrl":"https://doi.org/10.1109/ICC.1988.13732","url":null,"abstract":"A description is given of the O&M (operation and maintenance) systems developed to cover the requirements for O&M centralization in evolution from an electromechanical exchanges network to a digital switching network (DSN) and to provide a complete telecommunication management network (TMN). The discussion covers the network configuration, O&M for digital exchanges, a hierarchical approach and functional distribution, protocols and transmission media, different O&M approaches, and network service center architecture.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121519107","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
UHF satellite sound broadcasting technology 超高频卫星声音广播技术
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13550
P. Ratliff
{"title":"UHF satellite sound broadcasting technology","authors":"P. Ratliff","doi":"10.1109/ICC.1988.13550","DOIUrl":"https://doi.org/10.1109/ICC.1988.13550","url":null,"abstract":"In preparation for a world satellite planning conference to be held late in 1988, various developments in UHF satellite sound broadcasting technology have been reported. This work is reviewed and system problems created by the adverse multipath propagation environment are aired, together with a description of new and advanced digital coding and modulation schemes tailored to deal with such difficulties. It is concluded that there is a viable range of systems and technology under development which could be realized in the early 1990s to begin satellite sound broadcasting services.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"119 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114045280","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
CCIR propagation studies relevant to WARC-ORB 88 与WARC-ORB 88相关的CCIR传播研究
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13553
K. Dunk
{"title":"CCIR propagation studies relevant to WARC-ORB 88","authors":"K. Dunk","doi":"10.1109/ICC.1988.13553","DOIUrl":"https://doi.org/10.1109/ICC.1988.13553","url":null,"abstract":"The propagation studies relevant to the technical bases needed for the World Administrative Radio Conference, WARC-ORB 88, are summarized, and mention is made of the CCIR international and national machinery that has facilitated achieving the necessary agreement on prediction procedures. The need for further activity in some areas is noted and suggestions offered as to how the component parts of the national and international radiocommunications community might expedite progress.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125276520","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
Bounds on worst-case bit-error probability for asynchronous spread-spectrum multiple-access 异步扩频多址的最坏误码概率边界
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13781
M. Hizlan, B. Hughes
{"title":"Bounds on worst-case bit-error probability for asynchronous spread-spectrum multiple-access","authors":"M. Hizlan, B. Hughes","doi":"10.1109/ICC.1988.13781","DOIUrl":"https://doi.org/10.1109/ICC.1988.13781","url":null,"abstract":"The Gaussian multiple-access channel shared by K asynchronous transmitters is considered. A simplified model for uncoded bit-error probability is introduced for direct-sequence spread-spectrum multi-access systems with unknown, nonrandom transmitter parameters. Worst-case bit-error probability is investigated in the presence of a maximum-power constraint on the channel interference. A low bound and a Chernoff upper bound are presented for the worst-case bit-error probability.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122640455","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
Sharing possibilities for UHF satellite sound broadcasting 分享超高频卫星声音广播的可能性
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13551
J.E. Miller
{"title":"Sharing possibilities for UHF satellite sound broadcasting","authors":"J.E. Miller","doi":"10.1109/ICC.1988.13551","DOIUrl":"https://doi.org/10.1109/ICC.1988.13551","url":null,"abstract":"Sound broadcasting from a geostationary satellite. to portable and vehicular receivers is one of the few space applications for which there are no enabling national or international regulatory provisions. After more than 10 years of study by the CCIR, WARC (World Administrative Radio Conference) ORB(2) considers the results of the studies and the proposals concerning satellite sound broadcasting submitted to the conference and will decide either to make regulatory provisions for the service in a segment of the radio frequency spectrum that extends from about 500 MHz up to 2000 MHz or to defer significant action to a future competent WARC. Four example satellite sound broadcasting systems studied by CCIR are described, and the conditions for sharing between the broadcasting-satellite service (sound) and terrestrial services.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128080359","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
Stability and performance of pseudo-Bayesian controlled CSMA-CD 伪贝叶斯控制CSMA-CD的稳定性和性能
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13756
P. Cantrell, W. K. Tsai, J.F. Tuan
{"title":"Stability and performance of pseudo-Bayesian controlled CSMA-CD","authors":"P. Cantrell, W. K. Tsai, J.F. Tuan","doi":"10.1109/ICC.1988.13756","DOIUrl":"https://doi.org/10.1109/ICC.1988.13756","url":null,"abstract":"The pseudo-Bayesian method for dynamic control of carrier-sense multiple-access with collision detection (CSMA-CD) is examined and shown to be stable. It is also shown that Monte Carlo simulations closely match analytic results for throughput and throughput delay. The close correspondence of the throughput-delay simulation data to analytic results for optimal performance from J.S. Meditch and C.A. Lea (1983) is significant because the latter are based on a known backlog, whereas the pseudo-Bayesian algorithm requires only an estimate. The throughput-delay results are optimum in the sense that the delay is the smallest possible for a given throughput.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"507 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133530253","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: 2
A DCT gain-shape vector quantizer for image coding 用于图像编码的DCT增益形状矢量量化器
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13750
H.-S. Wu, H.-B. Chen
{"title":"A DCT gain-shape vector quantizer for image coding","authors":"H.-S. Wu, H.-B. Chen","doi":"10.1109/ICC.1988.13750","DOIUrl":"https://doi.org/10.1109/ICC.1988.13750","url":null,"abstract":"A discrete cosine-transform (DCT) image-coding technique using the gain-shape vector quantizer is presented. The original image is partitioned into many subblocks, and each subblock undergoes a two-dimensional DCT. The vectors to the quantizer are formed by selecting the same coefficients from th different transform subblocks. The normalized AC and DC vectors with mean removal can be modeled as standard distributions. Various level gain and shape codebooks are designed based on these models. The gain component is quantized by a scalar Lloyd's quantizer (1982). The bit allocation for the vector quantizer is designed to minimize distortion. The technique has been applied to a real image to evaluate its performance.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133660850","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: 2
Low bit-rate LPC speech communications via a new multipulse speech model 基于多脉冲语音模型的低比特率LPC语音通信
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13816
L. D. Paarmann, C.A. Magner, B. McCarthy
{"title":"Low bit-rate LPC speech communications via a new multipulse speech model","authors":"L. D. Paarmann, C.A. Magner, B. McCarthy","doi":"10.1109/ICC.1988.13816","DOIUrl":"https://doi.org/10.1109/ICC.1988.13816","url":null,"abstract":"A speech model with an excitation that is a multipulse sequence with additive white noise is presented. This model, when used in a 4.8-kb/s communication system, has the potential for improved synthetic speech quality. The algorithm is described and convergence for synthetic data of the assumed structure is proved. A method for significantly improved efficiency is presented, based on an algorithm given by M. Korenberg (1985). Initial experimental data that support both the authors' and Korenberg algorithms are given.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133661773","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
NICENET-a packet-switched integrated voice and data local area network nicenet—分组交换的综合语音和数据局域网
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13545
X. Xie, Ziping Xu
{"title":"NICENET-a packet-switched integrated voice and data local area network","authors":"X. Xie, Ziping Xu","doi":"10.1109/ICC.1988.13545","DOIUrl":"https://doi.org/10.1109/ICC.1988.13545","url":null,"abstract":"A packet-switched integrated voice and data local area network (LAN) called NICENET has been installed. The main components of NICENET are described. In order to assure the requirements of real-time communications, the data-communication-oriented network protocols must be modified. Some modified parameters of the protocol service primitives are discussed.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134240001","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信