Pub Date : 2010-06-07DOI: 10.1109/ISCE.2010.5523279
Damien Le Moa, Donald Molaron, Z. Bandic
General purpose file systems traditionally use sequential data block allocation policies, which by reducing disk head seek and rotational latency increase disk access performance. However, these methods also directly expose the variable data transfer rate of modern multi-zone disks, resulting in unstable and non-predictable disk throughput depending on the files being accessed. In this paper, we present the Zone-Round-Robin (ZRR) block allocation policy which avoids this problem by distributing the data blocks of a file over the entire disk to achieve near constant file access rates. Experimental results show that ZRR leads to stable disk performance independently of the set of files being used and that the data throughput achieved is close to the average disk performance.
{"title":"Stable disk performance with non-sequential data block placement","authors":"Damien Le Moa, Donald Molaron, Z. Bandic","doi":"10.1109/ISCE.2010.5523279","DOIUrl":"https://doi.org/10.1109/ISCE.2010.5523279","url":null,"abstract":"General purpose file systems traditionally use sequential data block allocation policies, which by reducing disk head seek and rotational latency increase disk access performance. However, these methods also directly expose the variable data transfer rate of modern multi-zone disks, resulting in unstable and non-predictable disk throughput depending on the files being accessed. In this paper, we present the Zone-Round-Robin (ZRR) block allocation policy which avoids this problem by distributing the data blocks of a file over the entire disk to achieve near constant file access rates. Experimental results show that ZRR leads to stable disk performance independently of the set of files being used and that the data throughput achieved is close to the average disk performance.","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123804417","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}
Pub Date : 2010-06-07DOI: 10.1109/ISCE.2010.5522729
Ying-Wen Bai, Zong-Han Li, Zi-Li Xie
In this paper we design and implement an embedded surveillance system with multiple Pyroelectric Infrared sensors (PIR) and ultrasonic sensors which turn on the embedded surveillance system according to the signals triggered by their majority voting mechanism (MVM). The PIR sensors are used to detect changes in human temperature and environment temperature, but have a high miss rate in the case of a slow walking intruder or an object with heat insulation. To overcome these disadvantages of the PIR sensors, we add ultrasonic sensors to complement them. The ultrasonic sensor module consists of a transmitter and a receiver which are placed in a line direction. The receiver detects signals and decides whether it is blocked. The ultrasonic transmission spreads a beam angle, so we use multiple ultrasonic sensors to receive it and to provide the majority voting mechanism.
{"title":"Enhancement of the complement of an embedded surveillance system with PIR sensors and ultrasonic sensors","authors":"Ying-Wen Bai, Zong-Han Li, Zi-Li Xie","doi":"10.1109/ISCE.2010.5522729","DOIUrl":"https://doi.org/10.1109/ISCE.2010.5522729","url":null,"abstract":"In this paper we design and implement an embedded surveillance system with multiple Pyroelectric Infrared sensors (PIR) and ultrasonic sensors which turn on the embedded surveillance system according to the signals triggered by their majority voting mechanism (MVM). The PIR sensors are used to detect changes in human temperature and environment temperature, but have a high miss rate in the case of a slow walking intruder or an object with heat insulation. To overcome these disadvantages of the PIR sensors, we add ultrasonic sensors to complement them. The ultrasonic sensor module consists of a transmitter and a receiver which are placed in a line direction. The receiver detects signals and decides whether it is blocked. The ultrasonic transmission spreads a beam angle, so we use multiple ultrasonic sensors to receive it and to provide the majority voting mechanism.","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115450014","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}
Pub Date : 2010-06-07DOI: 10.1109/ISCE.2010.5523256
Thilo Ernst, A. Schramm
This paper introduces FlashFind, an on-device search engine for making the vast amounts of digital content stored on today's flash memory-enabled mobile devices (PMP's, PND's, e-readers, smart phones) instantly accessible through a single-widget search interface. Without network access, FlashFind provides a search experience comparable to that of standard web search engines. More than that, the search is fully incremental and prefix-based, i.e. results are shown shortly after each key press, and instead of entire words, the user mostly needs to type only a small number of characters until the desired result is found. The pilot application, implemented on Windows Mobile smart phones and on Linux, provides near-instantaneous global search-based selection among the streets, points of interest and cities in a map of Western Europe (-10 millions of entries) and is being integrated into a commercial navigation application. The patent-pending FlashFind technology is equally capable to search other coarsely-structured text-based or text-annotated spatial or non-spatial content, e.g. collections of e-books on an e-reader device. In contrast to server or desktop search solutions, FlashFind is optimized for the limitations of mobile devices in terms of CPU, main memory, and interaction constraints (e.g. having only a phone keypad). Ongoing work is targeted at fuzzy search, at new applications and device classes, and at integrating our search technology with other innovative input methods.
{"title":"FlashFind: Responsive search in large datasets on mobile devices","authors":"Thilo Ernst, A. Schramm","doi":"10.1109/ISCE.2010.5523256","DOIUrl":"https://doi.org/10.1109/ISCE.2010.5523256","url":null,"abstract":"This paper introduces FlashFind, an on-device search engine for making the vast amounts of digital content stored on today's flash memory-enabled mobile devices (PMP's, PND's, e-readers, smart phones) instantly accessible through a single-widget search interface. Without network access, FlashFind provides a search experience comparable to that of standard web search engines. More than that, the search is fully incremental and prefix-based, i.e. results are shown shortly after each key press, and instead of entire words, the user mostly needs to type only a small number of characters until the desired result is found. The pilot application, implemented on Windows Mobile smart phones and on Linux, provides near-instantaneous global search-based selection among the streets, points of interest and cities in a map of Western Europe (-10 millions of entries) and is being integrated into a commercial navigation application. The patent-pending FlashFind technology is equally capable to search other coarsely-structured text-based or text-annotated spatial or non-spatial content, e.g. collections of e-books on an e-reader device. In contrast to server or desktop search solutions, FlashFind is optimized for the limitations of mobile devices in terms of CPU, main memory, and interaction constraints (e.g. having only a phone keypad). Ongoing work is targeted at fuzzy search, at new applications and device classes, and at integrating our search technology with other innovative input methods.","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117262563","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}
Pub Date : 2010-06-07DOI: 10.1109/ISCE.2010.5522743
Lourdes Beloqui Yuste, H. Melvin
User interactivity and customisation are key features that must be promoted to help distinguish IPTV from satellite/aerial/cable TV alternatives. Furthermore, IPTV providers also have to compete with Internet TV by providing extra features to justify the cost. In this paper, we present a number of scenarios whereby IPTV providers can achieve this through the use of synchronised time. Integrating and tightly synchronising multiple user-selected media streams in Real-Time that are logically and temporally related potentially adds significant extra value to any IPTV platform. It also raises significant research challenges. We outline the prototype developed for a TV/Text Feed scenario and present some details of ongoing and future work.
{"title":"Enhanced IPTV services through time synchronisation","authors":"Lourdes Beloqui Yuste, H. Melvin","doi":"10.1109/ISCE.2010.5522743","DOIUrl":"https://doi.org/10.1109/ISCE.2010.5522743","url":null,"abstract":"User interactivity and customisation are key features that must be promoted to help distinguish IPTV from satellite/aerial/cable TV alternatives. Furthermore, IPTV providers also have to compete with Internet TV by providing extra features to justify the cost. In this paper, we present a number of scenarios whereby IPTV providers can achieve this through the use of synchronised time. Integrating and tightly synchronising multiple user-selected media streams in Real-Time that are logically and temporally related potentially adds significant extra value to any IPTV platform. It also raises significant research challenges. We outline the prototype developed for a TV/Text Feed scenario and present some details of ongoing and future work.","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132294911","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}
Pub Date : 2010-06-07DOI: 10.1109/ISCE.2010.5523738
M. Semsarzadeh, M. Hashemi
Due to the explosive growth in ubiquitous multimedia access, one needs to adapt the considerable number of pre-encoded video content to a wide variety of user constraints such as different resolution, bitrate, frame rate, processing power and platform. Current adaptation frameworks do not take the encoder into account. In other words the encoder optimizes its outcome for the base layer only, regardless of the remaining adaptation layers and the resulted distortion once the adaptation is applied. In this paper, a joint multi rate optimization algorithm has been proposed for H.264/AVC that generates an encoded bitstream that will have the minimum distortion across all the layers combined, hence providing an improved experience for a larger number of users. The proposed scheme, that only supports bitrate adaption, is independent of the adaptation algorithm and is applicable to most existing adaptation frameworks. Simulation results indicate that the proposed scheme improves the video quality by up to 0.8 dB. The quality improvement of the adapted content is more significant in lower bitrates where even small improvements are visually noticeable due to the inherent low quality in these bitrates.
{"title":"A joint multi rate optimization framework for video adaptation in H.264/AVC","authors":"M. Semsarzadeh, M. Hashemi","doi":"10.1109/ISCE.2010.5523738","DOIUrl":"https://doi.org/10.1109/ISCE.2010.5523738","url":null,"abstract":"Due to the explosive growth in ubiquitous multimedia access, one needs to adapt the considerable number of pre-encoded video content to a wide variety of user constraints such as different resolution, bitrate, frame rate, processing power and platform. Current adaptation frameworks do not take the encoder into account. In other words the encoder optimizes its outcome for the base layer only, regardless of the remaining adaptation layers and the resulted distortion once the adaptation is applied. In this paper, a joint multi rate optimization algorithm has been proposed for H.264/AVC that generates an encoded bitstream that will have the minimum distortion across all the layers combined, hence providing an improved experience for a larger number of users. The proposed scheme, that only supports bitrate adaption, is independent of the adaptation algorithm and is applicable to most existing adaptation frameworks. Simulation results indicate that the proposed scheme improves the video quality by up to 0.8 dB. The quality improvement of the adapted content is more significant in lower bitrates where even small improvements are visually noticeable due to the inherent low quality in these bitrates.","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130031250","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}
Pub Date : 2010-06-07DOI: 10.1109/ISCE.2010.5523734
S. Schiemenz, C. Hentschel
Spatial image resizing is a very important issue for pixel oriented displays with variable input formats. A known example is a scaling factor of two for up-scaling from Standard Definition (SD) to High Definition (HD) format. We investigated an up-scaler for rational factors with nonlinear detail enhancement using principle of Priority Processing. Priority Processing can guarantee real time performance on programmable platforms even with limited resources. Our up-scaler adapts to the available hardware resources and depicts a good output quality for a wide range of scalability.
{"title":"Scalable high quality nonlinear up-scaler with guaranteed real time performance","authors":"S. Schiemenz, C. Hentschel","doi":"10.1109/ISCE.2010.5523734","DOIUrl":"https://doi.org/10.1109/ISCE.2010.5523734","url":null,"abstract":"Spatial image resizing is a very important issue for pixel oriented displays with variable input formats. A known example is a scaling factor of two for up-scaling from Standard Definition (SD) to High Definition (HD) format. We investigated an up-scaler for rational factors with nonlinear detail enhancement using principle of Priority Processing. Priority Processing can guarantee real time performance on programmable platforms even with limited resources. Our up-scaler adapts to the available hardware resources and depicts a good output quality for a wide range of scalability.","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114520485","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}
Pub Date : 2010-06-07DOI: 10.1109/ISCE.2010.5523739
H. Cycon, D. Marpe, T. Schmidt, M. Wahlisch, Martin Winken
In this paper, we describe and analyze a low complexity scalable video codec that extends our H.264-implementation DAVC. We can show that DSVC, our temporally scaled codec, attains an RD performance identical to the non-scaled version at comparable configuration. We achieve this by QP cascading, a method of assigning gradual refining quantization parameters to the declining temporal layers. The different quantization of frames does not lead to visual distinguishable quality fluctuations. This video codec is the core component of a software-based multipoint videoconference system, which works without MCU on a hybrid P2P network structure.
{"title":"Optimized temporal scalability for H.264 based codecs and its applications to video conferencing","authors":"H. Cycon, D. Marpe, T. Schmidt, M. Wahlisch, Martin Winken","doi":"10.1109/ISCE.2010.5523739","DOIUrl":"https://doi.org/10.1109/ISCE.2010.5523739","url":null,"abstract":"In this paper, we describe and analyze a low complexity scalable video codec that extends our H.264-implementation DAVC. We can show that DSVC, our temporally scaled codec, attains an RD performance identical to the non-scaled version at comparable configuration. We achieve this by QP cascading, a method of assigning gradual refining quantization parameters to the declining temporal layers. The different quantization of frames does not lead to visual distinguishable quality fluctuations. This video codec is the core component of a software-based multipoint videoconference system, which works without MCU on a hybrid P2P network structure.","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114682051","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}
Pub Date : 2010-06-07DOI: 10.1109/ISCE.2010.5523701
Y. Lee, Chul Kwak, I. Lee, O. Kwon
This paper addresses the problem of single-channel speech separation to extract and enhance the desired speech signals from mixed speech signals. We propose a new speech separation algorithm by utilizing both magnitude and phase information, which can be applied to multimedia mobile communication and navigation systems. Conventionally, phase information has been neglected in speech signal processing. However, in the proposed method, we originally formulate a probabilistic phase-based speech estimator based on zero-phase models to improve the speech separation performance. In the speech separation experiments, the proposed method is shown to improve speaker-to-interference ratio (SIR) by 2.2 dB compared to the system using magnitude models only. When only phase-based speech estimator is used for speech separation, the SIR was improved by 0.8 dB. This result justify that the proposed phase-based speech estimation method achieves significant SIR improvement compared with the previous magnitude-based method.
{"title":"Single-channel speech separation using zero-phase models","authors":"Y. Lee, Chul Kwak, I. Lee, O. Kwon","doi":"10.1109/ISCE.2010.5523701","DOIUrl":"https://doi.org/10.1109/ISCE.2010.5523701","url":null,"abstract":"This paper addresses the problem of single-channel speech separation to extract and enhance the desired speech signals from mixed speech signals. We propose a new speech separation algorithm by utilizing both magnitude and phase information, which can be applied to multimedia mobile communication and navigation systems. Conventionally, phase information has been neglected in speech signal processing. However, in the proposed method, we originally formulate a probabilistic phase-based speech estimator based on zero-phase models to improve the speech separation performance. In the speech separation experiments, the proposed method is shown to improve speaker-to-interference ratio (SIR) by 2.2 dB compared to the system using magnitude models only. When only phase-based speech estimator is used for speech separation, the SIR was improved by 0.8 dB. This result justify that the proposed phase-based speech estimation method achieves significant SIR improvement compared with the previous magnitude-based method.","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"198 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116483242","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}
Pub Date : 2010-06-07DOI: 10.1109/ISCE.2010.5522766
K. Glasman, Alex Glasman, E. Grinenko, B. Falchuk
Web-accessible video sites are currently some of the most visited on the mobile Web. It is expected that the number of these sites will continue to grow and that customers will want more powerful exploration tools. Recently, we described an innovative content-based tool for video browsing called MobileTiles. In this paper we describe Semantic MobileTiles, an improved version of MobileTiles based on semantically meaningful key frame selection. We propose a method of approximation of semantically compressed versions of short movies. We found that a good approximation can be achieved if pairs of key frames from each shot boundary are used to represent a sequence of shots. Semantic MobileTiles provides a novel abstraction/understanding tool that enables users to get the main idea of a short movie at a glance. Our algorithm is both effective and computationally simple.
{"title":"Semantic mobiletiles: A tool for movie content understanding on mobile phones","authors":"K. Glasman, Alex Glasman, E. Grinenko, B. Falchuk","doi":"10.1109/ISCE.2010.5522766","DOIUrl":"https://doi.org/10.1109/ISCE.2010.5522766","url":null,"abstract":"Web-accessible video sites are currently some of the most visited on the mobile Web. It is expected that the number of these sites will continue to grow and that customers will want more powerful exploration tools. Recently, we described an innovative content-based tool for video browsing called MobileTiles. In this paper we describe Semantic MobileTiles, an improved version of MobileTiles based on semantically meaningful key frame selection. We propose a method of approximation of semantically compressed versions of short movies. We found that a good approximation can be achieved if pairs of key frames from each shot boundary are used to represent a sequence of shots. Semantic MobileTiles provides a novel abstraction/understanding tool that enables users to get the main idea of a short movie at a glance. Our algorithm is both effective and computationally simple.","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122463216","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}
Pub Date : 2010-06-07DOI: 10.1109/ISCE.2010.5523699
N. Vun, M. Ansary
This paper presents the methodologies taken to integrate open-source LIVE555 based data streamer with a baseline H.264 encoder running on the Texas Instruments's DaVinci based embedded platform. The system implemented is able to stream live H.264 encoded video over the network, and be displayed on remote stations using the VLC media player. The system developed provides an embedded platform to implement a smart surveillance camera system, whereby video analysis can be performed locally on the embedded platform to minimize the streaming throughput by making use of the H.264 motion vector information.
{"title":"Implementation of an embedded H.264 live video streaming system","authors":"N. Vun, M. Ansary","doi":"10.1109/ISCE.2010.5523699","DOIUrl":"https://doi.org/10.1109/ISCE.2010.5523699","url":null,"abstract":"This paper presents the methodologies taken to integrate open-source LIVE555 based data streamer with a baseline H.264 encoder running on the Texas Instruments's DaVinci based embedded platform. The system implemented is able to stream live H.264 encoded video over the network, and be displayed on remote stations using the VLC media player. The system developed provides an embedded platform to implement a smart surveillance camera system, whereby video analysis can be performed locally on the embedded platform to minimize the streaming throughput by making use of the H.264 motion vector information.","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124637532","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}
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