Pub Date : 2010-06-07DOI: 10.1109/ISCE.2010.5522720
H. Meuel, J. Robert
The second generation terrestrial transmission standard DVB-T2 introduces the application of MIMO techniques based on the well-known Alamouti scheme for improved mobile and portable reception. However, no channel models are currently available to estimate the gain of Alamouti coding in these channels. Therefore, this document presents a new approach that uses existing DVB-T networks as channel sounder. Using this approach, the complete DVB-T channel is digitized and then evaluated offline using MATLAB, which allows for accurate but time consuming algorithms. Initial measurement results already indicate the high accuracy of the developed solution. This tool can then be used in further measurement campaigns. The obtained measurement results can be incorporated in new channel models that allow for estimating the gain of multi-antenna techniques in these channels.
{"title":"MIMO channel analysis using DVB-T signals","authors":"H. Meuel, J. Robert","doi":"10.1109/ISCE.2010.5522720","DOIUrl":"https://doi.org/10.1109/ISCE.2010.5522720","url":null,"abstract":"The second generation terrestrial transmission standard DVB-T2 introduces the application of MIMO techniques based on the well-known Alamouti scheme for improved mobile and portable reception. However, no channel models are currently available to estimate the gain of Alamouti coding in these channels. Therefore, this document presents a new approach that uses existing DVB-T networks as channel sounder. Using this approach, the complete DVB-T channel is digitized and then evaluated offline using MATLAB, which allows for accurate but time consuming algorithms. Initial measurement results already indicate the high accuracy of the developed solution. This tool can then be used in further measurement campaigns. The obtained measurement results can be incorporated in new channel models that allow for estimating the gain of multi-antenna techniques in these channels.","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"23 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":"124878657","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.2010.5523727
J. Brandt, L. Wolf
The number and types of mobile devices which are capable of presenting digital video streams is increasing constantly. In most cases the devices are trade-offs between powerful all-purpose computers and small mobile devices which are ubiquitously available and range from cellular phones to notebooks. This great heterogeneity of mobile devices makes video streaming to such devices a challenging task for content providers. Each single device has its own capabilities and individual requirements, which need to be considered when sending a video stream to it. Thus, to support a great range of different devices, the video streams need to be adapted to the requirements of each device. To get an idea of how different adaptation methods may affect the experience of users watching a streamed video on a mobile device, we inspect the influence of three major adaptation dimensions on the produced quality of the stream. Based on these results, we are able to give a clear recommendation for a multidimensional adaptation of digital video streams.
{"title":"Impact of adaptation dimensions on video quality","authors":"J. Brandt, L. Wolf","doi":"10.1109/ISCE.2010.5523727","DOIUrl":"https://doi.org/10.1109/ISCE.2010.5523727","url":null,"abstract":"The number and types of mobile devices which are capable of presenting digital video streams is increasing constantly. In most cases the devices are trade-offs between powerful all-purpose computers and small mobile devices which are ubiquitously available and range from cellular phones to notebooks. This great heterogeneity of mobile devices makes video streaming to such devices a challenging task for content providers. Each single device has its own capabilities and individual requirements, which need to be considered when sending a video stream to it. Thus, to support a great range of different devices, the video streams need to be adapted to the requirements of each device. To get an idea of how different adaptation methods may affect the experience of users watching a streamed video on a mobile device, we inspect the influence of three major adaptation dimensions on the produced quality of the stream. Based on these results, we are able to give a clear recommendation for a multidimensional adaptation of digital video streams.","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"16 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":"132590850","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.2010.5523729
Oliver Hoffmann, R. Kays
This paper evaluates the major MAC enhancement of IEEE 802.11n to realize high throughput, i.e. frame aggregation. In contrast to existing studies of this enhancement, we analyze the efficiency instead of the mere performance. The results show significant efficiency improvement by frame aggregation. Furthermore, the efficiency analysis leads to important conclusions for system configuration and adaptation and reveals effects which are beyond the scope of existing work. It is shown that the most feasible configuration is to apply maximum aggregation and to adapt the modulation and coding scheme (MCS) instead of the frame size. Furthermore, the efficiency analysis points out that in case the network is not saturated the 20 MHz mode is more efficient than the 40 MHz option.
{"title":"Efficiency of frame aggregation in wireless multimedia networks based on IEEE 802.11n","authors":"Oliver Hoffmann, R. Kays","doi":"10.1109/ISCE.2010.5523729","DOIUrl":"https://doi.org/10.1109/ISCE.2010.5523729","url":null,"abstract":"This paper evaluates the major MAC enhancement of IEEE 802.11n to realize high throughput, i.e. frame aggregation. In contrast to existing studies of this enhancement, we analyze the efficiency instead of the mere performance. The results show significant efficiency improvement by frame aggregation. Furthermore, the efficiency analysis leads to important conclusions for system configuration and adaptation and reveals effects which are beyond the scope of existing work. It is shown that the most feasible configuration is to apply maximum aggregation and to adapt the modulation and coding scheme (MCS) instead of the frame size. Furthermore, the efficiency analysis points out that in case the network is not saturated the 20 MHz mode is more efficient than the 40 MHz option.","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"142 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":"132431581","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.2010.5523722
S. Gauss, T. Muller, T. Roll, J. Wunschmann, A. Rothermel
The automated evaluation of mobile television receivers shall be facilitated by objective video quality assessment. Therefore, a test bench was set up, whose design and signal flow will be presented first. We describe and compare different full-reference video quality metrics and a simple no-reference metric from literature. The implemented metrics are evaluated and then used to assess the video quality of receivers for digital television broadcast by applying different RF scenarios. We present the achieved results with the different metrics for the purpose of receiver comparison.
{"title":"Objective video quality assessment of mobile television receivers","authors":"S. Gauss, T. Muller, T. Roll, J. Wunschmann, A. Rothermel","doi":"10.1109/ISCE.2010.5523722","DOIUrl":"https://doi.org/10.1109/ISCE.2010.5523722","url":null,"abstract":"The automated evaluation of mobile television receivers shall be facilitated by objective video quality assessment. Therefore, a test bench was set up, whose design and signal flow will be presented first. We describe and compare different full-reference video quality metrics and a simple no-reference metric from literature. The implemented metrics are evaluated and then used to assess the video quality of receivers for digital television broadcast by applying different RF scenarios. We present the achieved results with the different metrics for the purpose of receiver comparison.","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"67 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":"129085410","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.2010.5654668
Huajun Yu, T. Fingscheidt
Microphone arrays and beamforming for car applications have gained much attention in the past. While several proposals aim at quite idealistic conditions, our approach intentionally employs low-cost microphones. Moreover, we assume the microphone array to be integrated into the head-unit of the car. Although from an acoustical perspective this is not an ideal location, it is yet very attractive since it omits further wiring and offers a compact and optimized solution. To achieve the required level of directivity and noise reduction in car noise, the a priori noise field of diffuse noise is exploited. A new postfilter estimation using an adaptive smoothing factor along with an estimation quality indicator is proposed which is well suited for low-cost microphones. Meanwhile, an intrusive instrumental evaluation methodology will be introduced. We will show that a significant level of noise attenuation can be achieved, while the quality of the speech component will be improved compared to the state-of-the-art.
{"title":"A post-filter for wideband speech beamforming in automotive application","authors":"Huajun Yu, T. Fingscheidt","doi":"10.1109/ISCE.2010.5654668","DOIUrl":"https://doi.org/10.1109/ISCE.2010.5654668","url":null,"abstract":"Microphone arrays and beamforming for car applications have gained much attention in the past. While several proposals aim at quite idealistic conditions, our approach intentionally employs low-cost microphones. Moreover, we assume the microphone array to be integrated into the head-unit of the car. Although from an acoustical perspective this is not an ideal location, it is yet very attractive since it omits further wiring and offers a compact and optimized solution. To achieve the required level of directivity and noise reduction in car noise, the a priori noise field of diffuse noise is exploited. A new postfilter estimation using an adaptive smoothing factor along with an estimation quality indicator is proposed which is well suited for low-cost microphones. Meanwhile, an intrusive instrumental evaluation methodology will be introduced. We will show that a significant level of noise attenuation can be achieved, while the quality of the speech component will be improved compared to the state-of-the-art.","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"67 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":"121562903","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.2010.5522701
M. Spika
This paper introduces a modular software platform and the respective synchronization mechanisms that support services with flexible multimodal user interfaces (UI). The platform is based on Java technology for the service logic and XML-based description languages such as SVG and VoiceXML for UI definition. A Sensor Data Manager allows including input from device sensors such as accelerometers. First of all, this paper describes the motivation for specifying a flexible and multimodal UI. Secondly, it presents how multimodal services are defined on mobile devices nowadays, followed by a description of our multimodal architecture approach. The focus lies on the integration of user input from a variety of device sensors and the respective synchronization mechanisms.
{"title":"Synchronizing multimodal user input information in a modular mobile software platform","authors":"M. Spika","doi":"10.1109/ISCE.2010.5522701","DOIUrl":"https://doi.org/10.1109/ISCE.2010.5522701","url":null,"abstract":"This paper introduces a modular software platform and the respective synchronization mechanisms that support services with flexible multimodal user interfaces (UI). The platform is based on Java technology for the service logic and XML-based description languages such as SVG and VoiceXML for UI definition. A Sensor Data Manager allows including input from device sensors such as accelerometers. First of all, this paper describes the motivation for specifying a flexible and multimodal UI. Secondly, it presents how multimodal services are defined on mobile devices nowadays, followed by a description of our multimodal architecture approach. The focus lies on the integration of user input from a variety of device sensors and the respective synchronization mechanisms.","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"58 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":"114939553","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.2010.5523728
U. Reiter, Junyong You
Objective metrics are widely used to estimate the perceived quality of audio and video content in consumer electronics applications. Although a number of such metrics exist, they have all been developed for the unimodal case — cross-modal interaction, i.e. the influence of video on audio and vice versa, is not considered by these metrics. We give an overview on these, and summarize human audiovisual perception in light of modeling cross-modal interaction. Factors that influence perceived quality, e.g. attention, are discussed.
{"title":"Estimating perceived audiovisual and multimedia quality — a survey","authors":"U. Reiter, Junyong You","doi":"10.1109/ISCE.2010.5523728","DOIUrl":"https://doi.org/10.1109/ISCE.2010.5523728","url":null,"abstract":"Objective metrics are widely used to estimate the perceived quality of audio and video content in consumer electronics applications. Although a number of such metrics exist, they have all been developed for the unimodal case — cross-modal interaction, i.e. the influence of video on audio and vice versa, is not considered by these metrics. We give an overview on these, and summarize human audiovisual perception in light of modeling cross-modal interaction. Factors that influence perceived quality, e.g. attention, are discussed.","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"16 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":"121860972","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 : 2010-06-01DOI: 10.1109/ISCE.2010.5523690
Seungsoo Yoo, Yeongmoon Kim, Ki-Seung Lee, Kyoungro Yoon, Sun Yong Kim, Seok-Pil Lee
A novel adaptive stereo sound system is proposed. The proposed scheme consists of two parts: listener position tracking using self-generating sound signals, and space skew/crosstalk cancelation. To verify the effectiveness of the proposed system, a positioning accuracy test and a subjective listener's test were carried out. It was shown that the probability of a mean squared positioning error of less than 0.07m2 ranged from 70% to 90% when hand-clap signals were used in a small room. The results from the subjective listening test showed that 71% of the total stimuli were perceived as coming from the desired virtual location, regardless of the listener's position.
{"title":"A novel adaptive stereo sound system with self-generating sound-based listener tracking","authors":"Seungsoo Yoo, Yeongmoon Kim, Ki-Seung Lee, Kyoungro Yoon, Sun Yong Kim, Seok-Pil Lee","doi":"10.1109/ISCE.2010.5523690","DOIUrl":"https://doi.org/10.1109/ISCE.2010.5523690","url":null,"abstract":"A novel adaptive stereo sound system is proposed. The proposed scheme consists of two parts: listener position tracking using self-generating sound signals, and space skew/crosstalk cancelation. To verify the effectiveness of the proposed system, a positioning accuracy test and a subjective listener's test were carried out. It was shown that the probability of a mean squared positioning error of less than 0.07m2 ranged from 70% to 90% when hand-clap signals were used in a small room. The results from the subjective listening test showed that 71% of the total stimuli were perceived as coming from the desired virtual location, regardless of the listener's position.","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125139474","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}
K. Berger, C. Lipski, C. Linz, A. Sellent, M. Magnor
We present a no-reference image quality metric for image interpolation. The approach is capable of detecting blurry regions as well as ghosting artifacts, e.g., in image based rendering scenarios. Based on the assumption that ghosting artifacts can be detected locally, perceived visual quality can be predicted from the amount of regions that are affected by ghosting. Because the approach does not require any reference image, it is very suitable, e.g., for assessing quality of image-based rendering techniques in general settings.
{"title":"A ghosting artifact detector for interpolated image quality assessment","authors":"K. Berger, C. Lipski, C. Linz, A. Sellent, M. Magnor","doi":"10.1145/1620993.1621022","DOIUrl":"https://doi.org/10.1145/1620993.1621022","url":null,"abstract":"We present a no-reference image quality metric for image interpolation. The approach is capable of detecting blurry regions as well as ghosting artifacts, e.g., in image based rendering scenarios. Based on the assumption that ghosting artifacts can be detected locally, perceived visual quality can be predicted from the amount of regions that are affected by ghosting. Because the approach does not require any reference image, it is very suitable, e.g., for assessing quality of image-based rendering techniques in general settings.","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131859126","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 : 1900-01-01DOI: 10.1109/isce.2010.5523711
{"title":"Introduction to the technical program of ISCE 2010","authors":"","doi":"10.1109/isce.2010.5523711","DOIUrl":"https://doi.org/10.1109/isce.2010.5523711","url":null,"abstract":"","PeriodicalId":403652,"journal":{"name":"IEEE International Symposium on Consumer Electronics (ISCE 2010)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115551648","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：