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2007 IEEE International Conference on Portable Information Devices最新文献

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System-Level Display Power Reduction Technologies for Portable Computing and Communications Devices 便携式计算和通信设备的系统级显示功耗降低技术
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.19
A. Bhowmik, R. J. Brennan
{"title":"System-Level Display Power Reduction Technologies for Portable Computing and Communications Devices","authors":"A. Bhowmik, R. J. Brennan","doi":"10.1109/PORTABLE.2007.19","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.19","url":null,"abstract":"This paper narrates a set of technologies that are integrated in Intel's graphics controller chipsets, offering platform-level power consumption reduction for the display subsystem of the portable computing and communications devices, thereby significantly enhancing their battery life.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127727228","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: 19
Proposed Architecture for Multimodality Using an Intelligent Multimodal Agent to Access Business Data Anytime and Anywhere in Mauritius. 在毛里求斯使用智能多模态代理随时随地访问业务数据的多模态架构建议。
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.41
V. Armoogum, J. Polin, S. Moonsamy, P.D. Luchun
{"title":"Proposed Architecture for Multimodality Using an Intelligent Multimodal Agent to Access Business Data Anytime and Anywhere in Mauritius.","authors":"V. Armoogum, J. Polin, S. Moonsamy, P.D. Luchun","doi":"10.1109/PORTABLE.2007.41","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.41","url":null,"abstract":"The government of Mauritius is striving to make the country a cyber paradise, that is, a destination of choice for tourist and investors for the high tech BPO and IT-enabled sector. This paper proposes an intelligent multimodal architecture to provide access to business data anywhere, any time inline with the vision to make Mauritius a cyber paradise. The architecture was tested in a Flight information system, discussed in the paper. Information was successfully retrieved via SMS, Pocket PC and Telephone without any human intervention on the server side.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114275774","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
Real Time Background Noise Cancellation in End User Device 终端用户设备的实时背景噪声消除
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.65
P. Mahanty, B. Firdous, R. Swarnkar
{"title":"Real Time Background Noise Cancellation in End User Device","authors":"P. Mahanty, B. Firdous, R. Swarnkar","doi":"10.1109/PORTABLE.2007.65","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.65","url":null,"abstract":"Intolerable noise has always been undesirable in end user communications devices. This is evident for instance during a cricket commentary by the noise of the crowd, or while conversing on a cell phone if the speaker at the other end is on a busy road or any such environment. Well, no doubt the noise in the former case definitely adds life to the sports enthusiasm but in the latter case it is highly undesirable as it adversely affects communication. The purpose of our proposed design is to provide a real time noise cancellation in end user devices.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124214454","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
Audio Quality and Acoustic Echo Issues for VOIP on Portable Devices 便携式设备上VOIP的音频质量和声学回声问题
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.22
G. Zoia, A. Sturzenegger, O. Hochreutiner
{"title":"Audio Quality and Acoustic Echo Issues for VOIP on Portable Devices","authors":"G. Zoia, A. Sturzenegger, O. Hochreutiner","doi":"10.1109/PORTABLE.2007.22","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.22","url":null,"abstract":"The control of the overall quality of service for VOIP applications depends for sure on features and capabilities of the network layer but at the same time, and especially in the case of low-resource, portable devices, it relies on smart flexible signal processing and control tools that allow tuning the usage of computational resources to obtain the best possible quality for a given system. Audio signal I/O (acquisition and rendering), packet loss concealment and acoustic echo detection and suppression play a fundamental role, since good algorithms are rather demanding for calculations but their presence is often necessary to compensate low-cost, average-quality platforms and interfaces. Some measures and remarks on these platforms and interfaces are presented in this paper, together with a set of implemented solutions providing a remarkable improvement in the mean opinion score of a typical VOIP conversation for different families of PDAs and Smartphones.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128405508","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
Methodology for RFI Immune Wireless Platforms: RFI Predictive Modeling RFI免疫无线平台的方法:RFI预测建模
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.27
K. R. Tinsley, Xiaopeng Dong
{"title":"Methodology for RFI Immune Wireless Platforms: RFI Predictive Modeling","authors":"K. R. Tinsley, Xiaopeng Dong","doi":"10.1109/PORTABLE.2007.27","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.27","url":null,"abstract":"In this paper, a systemic approach is presented to evaluate wireless platform performance early in the design cycle given the anticipated presence of radio frequency interference (RFI). By applying this methodology, sensitivity due to architecture choices such as: platform materials, component layout, and RFI reduction techniques can be evaluated and thereby lead to innovative platform designs.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"172 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122875066","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
Integrable High-Efficiency AC-DC Converter for Piezoelectric Energy Scavenging System 压电扫能系统的可积高效交直流变换器
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.61
Enrico Dallago, Giovanni Frattini, D. Miatton, G. Ricotti, G. Venchi
{"title":"Integrable High-Efficiency AC-DC Converter for Piezoelectric Energy Scavenging System","authors":"Enrico Dallago, Giovanni Frattini, D. Miatton, G. Ricotti, G. Venchi","doi":"10.1109/PORTABLE.2007.61","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.61","url":null,"abstract":"In recent years a lot of studies focused on energy-scavenging systems (ESS). An important motivation for these studies is the development of portable devices (PD) and of wireless sensors network (WSN). An ESS can be partitioned in two sections: the energy-scavenger itself and the electronic interface. The first one is the energy transducer while the second one is the electronic circuit which manages the energy. One of the most important objectives of the electronic interface is to realize the required ac-dc conversion. Since the output power level of the energy-scavenger can be very low, the conversion should be as efficient as possible. The goal of this paper is to design a voltage doubler ac-dc converter and optimize it. A passive and an active solution were compared using the converter efficiency as a figure of merit.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128644347","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: 20
Unified Power Management Framework for Portable Media Devices 便携式媒体设备统一电源管理框架
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.36
ashwin. iyenggar, ambudhar. tripathi, Ajit Basarur, Indranil Roy, ashwin. iyenggar, ambudhar. tripathi
{"title":"Unified Power Management Framework for Portable Media Devices","authors":"ashwin. iyenggar, ambudhar. tripathi, Ajit Basarur, Indranil Roy, ashwin. iyenggar, ambudhar. tripathi","doi":"10.1109/PORTABLE.2007.36","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.36","url":null,"abstract":"Power management is one of the key design challenges in the design of portable multimedia devices (PMD). Existing power management techniques are limited to hardware based DVFS (dynamic schemes) and do not take into account application states and many usage scenarios. In this correspondence, a new unified power management framework (UPMF) is proposed which describes a software architecture for a unified hardware and software controlled power management. The framework provides a set of rules for classifying the several devices on a PMD into device classes. Each of these device classes has a set of well-defined states based on the application state. The power management framework contains a power manager module that monitors the application and maintains the states of the devices and based on the power management strategy, controls the states of the devices. The proposed UPMF is very simple to implement and is well suited to handle power management strategies for several classes of applications. Performance of this proposed scheme for a portable media player and recorder device is also presented.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126227676","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: 6
Ultra-Low Cost GSM Phones Enabled by Baseband-Radios with Integrated Power-Management 超低成本GSM手机支持集成电源管理的基带无线电
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.54
C. Kranz, M. Hammes, J. Kissing, D. Seippel, V. Rezard, R. Hardy
{"title":"Ultra-Low Cost GSM Phones Enabled by Baseband-Radios with Integrated Power-Management","authors":"C. Kranz, M. Hammes, J. Kissing, D. Seippel, V. Rezard, R. Hardy","doi":"10.1109/PORTABLE.2007.54","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.54","url":null,"abstract":"A system on chip, providing all functions needed for a GSM/GPRS mobile phone, is presented. Because of the high integration level, one can build up ultra-low cost and ultra-small size mobile phones.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131103178","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
Power Save Adaptation Algorithm for Multimedia Streaming to Mobile Devices 多媒体流到移动设备的省电自适应算法
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.18
Janet Adams, Gabriel-Miro Muntean
{"title":"Power Save Adaptation Algorithm for Multimedia Streaming to Mobile Devices","authors":"Janet Adams, Gabriel-Miro Muntean","doi":"10.1109/PORTABLE.2007.18","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.18","url":null,"abstract":"Batteries have not followed the exponential technological improvements of other mobile device related hardware, such as CPU, memory and wireless networking. Battery power often introduces significant limitations to the use of mobile devices and their applications, including those involved in multimedia streaming that have significant high power requirements. This paper proposes a power save adaptation algorithm for mobile multimedia streaming that aims to increase streaming time given limited battery power resources. The multimedia streaming process is divided into three stages: data reception, decoding and playing and power saving solutions for each of these stages are proposed. These power save mechanisms are then combined to give the power save algorithm. Preliminary tests results show that significant increases in battery lifetime have been achieved when the power save mechanisms proposed in this paper are used.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115269940","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: 25
A System Level Fine-Grained Dynamic Voltage and Frequency Scaling for Portable Embedded Systems with Multiple Frequency Adjustable Components 具有多频率可调元件的便携式嵌入式系统系统级细粒度动态电压和频率缩放
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.56
Ku He, Yibo Chen, Rong Luo
{"title":"A System Level Fine-Grained Dynamic Voltage and Frequency Scaling for Portable Embedded Systems with Multiple Frequency Adjustable Components","authors":"Ku He, Yibo Chen, Rong Luo","doi":"10.1109/PORTABLE.2007.56","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.56","url":null,"abstract":"This paper presents a system level dynamic voltage and frequency scaling (DVFS) technique targeted toward non realtime applications running on a portable embedded system with multiple frequency-adjustable components. The key idea is to balance the frequency of processor core and memory. Some applications may be I/O bound, some may be CPU bound, and the others may be Memory bound. The proposed DVFS technique relies on pre-collected statistical information of different applications to calculate the expected workload for each coming time slice, and then, it adjusts the frequency of processor core, memory, and system bus to meet the timing constraints(with acceptable penalty) and achieves the maximum energy saving. The proposed technique has been tested on the PXA27x (XScale based) [8] embedded platform and the result was exciting, the processor energy saving can achieve up to 70% in memory bound applications, and the timing performance degradation was less than 5%. In CPU bound applications, the energy saving is relatively small, about 20~40%.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123909155","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
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