The Experts below are selected from a list of 279 Experts worldwide ranked by ideXlab platform
Geoffrey Mackellar - One of the best experts on this subject based on the ideXlab platform.
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Detecting Driver's Distraction using Long-term Recurrent Convolutional Network
arXiv: Signal Processing, 2020Co-Authors: Chang Wei Tan, Mahsa Salehi, Geoffrey MackellarAbstract:In this study we demonstrate a novel Brain Computer Interface (BCI) approach to detect driver distraction events to improve road safety. We use a commercial Wireless Headset that generates EEG signals from the brain. We collected real EEG signals from participants who undertook a 40-minute driving simulation and were required to perform different tasks while driving. These signals are segmented into short windows and labelled using a time series classification (TSC) model. We studied different TSC approaches and designed a Long-term Recurrent Convolutional Network (LCRN) model for this task. Our results showed that our LRCN model performs better than the state of the art TSC models at detecting driver distraction events.
Damien Sauveron - One of the best experts on this subject based on the ideXlab platform.
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optical Wireless channel simulation for communications inside aircraft cockpits
Journal of Lightwave Technology, 2020Co-Authors: Pierre Combeau, Stephanie Sahuguede, Lilian Aveneau, Herve Boeglen, Steve Joumessidemeffo, Anne Julienvergonjanne, Damien SauveronAbstract:Communications inside an aircraft cockpit are currently based on wired connections especially for the audio Headsets used by the pilots. A Wireless Headset would be an advantage in terms of comfort and flexibility but the use of classical radio frequencies is limited by interference and security issues. Optical Wireless communication technology is an option for Headset connectivity. Indeed, as optical beams are confined, this technology provides robustness against the risk of hacking, thus increasing security. In addition, the use of optical waves ensures the absence of radio-frequency disturbances. Using simulation, this article presents a thorough study of the optical Wireless channel behavior inside the cockpit of an aircraft by considering a Headset worn by a pilot possibly in motion and an access point at the ceiling. The impact of the characteristics of the environment model, such as the level of geometric description, the reflectivity of materials and for the first time, the ambient noise induced by the sun, is highlighted. System performance is evaluated in terms of optimal half-power angles and the necessary optical power of the light sources.
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A Link Reliability Study of Optical Wireless Headset inside Aircraft Cockpit
2019 Global LIFI Congress (GLC), 2019Co-Authors: Steve Joumessi-demeffo, Stephanie Sahuguede, Damien Sauveron, Anne Julien-vergonjanne, Pierre Combeau, B. Mercier, Lilian Aveneau, Herve BoeglenAbstract:Communications inside an aircraft cockpit are currently based on wired or radiofrequency connections. For instance, Wireless ones have been introduced to support the tablets. However, the use of radiofrequency technologies remains limited. For example, a Wireless connectivity for the Headset would be an advantage for the pilots in terms of comfort and flexibility but there are some issues especially concerning radiofrequency interferences but also audio data security. Optical Wireless communications based on visible light or infrared offer interesting possibilities to overcome these issues. Indeed, as optical beams are confined in the environment, this technology brings robustness against the risks of attacks, thus increasing security. In addition, radiofrequency immunity ensures the absence of disturbances, allowing more resources for communications. For the first time in the literature and using simulation, this paper investigates the optical Wireless channel for pilot Headset connectivity inside aircraft cockpit, and determines its performance in terms of maximal data rates that can be achieved for a given link reliability.
Emmanuel Touloupis - One of the best experts on this subject based on the ideXlab platform.
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ISCC - Z-Phone: Design and implementation of embedded Voice over Zigbee applications
2014 IEEE Symposium on Computers and Communications (ISCC), 2014Co-Authors: Apostolos Meliones, Emmanuel Touloupis, Jordi Perello, A. SerratAbstract:Short range Wireless technologies such as Bluetooth, WiFi and DECT are known to transmit voice, audio and/or video messages in real time. Energy consumption and transmission reach are critical in such networks, especially for portable and/or power autonomous devices. The purpose of the Voice over Zigbee technology is to provide a competitive offering that excels in these performance aspects. Due to the CSMA-CA mechanism implemented in the 802.15.4 layer a well-designed strategy must be taken into account in Zigbee to create a robust, reliable and full-duplex conversation. This article proves that the radio channel of Zigbee has enough bandwidth to support a full-duplex conversation with narrow band voice codecs. Furthermore, it presents the implementation and evaluation of a voice codec performed in the framework of the Z-Phone project, which targeted the development of a low cost, ultra low power, long range Wireless Headset using Zigbee technology to transmit voice in full-duplex mode for use with leading PC VoIP programs. Last but not least, it presents the results of the transmission range and power consumption tests involving the developed Headset prototype. Talk time is comparable to Bluetooth, but its deep-sleep lifetime doubles the Bluetooth performance. Another significant contribution of this work is towards understanding and resolving the challenges faced when trying to achieve good quality transmission of media over constrained devices and networks. The way to new voice-related Zigbee applications is open.
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Speech codecs for high-quality voice over ZigBee applications: Evaluation and implementation challenges
IEEE Communications Magazine, 2012Co-Authors: Emmanuel Touloupis, Apostolos Meliones, Spyros ApostolacosAbstract:The ZigBee standard is designed to enable the deployment of low-cost, low-power Wireless sensor and control networks based on the IEEE 802.15.4 physical radio standard. Despite the low data rates of ZigBee, its use for transmission of voice has been proven to be feasible. This article presents the evaluation and implementation of a voice codec performed in the framework of the Z-Phone project, which targeted the development of a low-cost, ultra-low-power, long-range, ergonomic Wireless Headset using ZigBee technology to transmit voice in full-duplex mode for use with leading PC VoIP programs. In particular, it presents all the criteria taken into account in selecting the most suitable codec, and also the details and performance of its implementation.
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ISCC - Implementation and evaluation of a voice codec for ZigBee
2011 IEEE Symposium on Computers and Communications (ISCC), 2011Co-Authors: Emmanuel Touloupis, Apostolos Meliones, Spyros ApostolacosAbstract:The Z-Phone project goal is to develop a low cost, ultra low-power, long range, ergonomic Wireless Headset using ZigBee Technology to transmit voice in full-duplex mode for use with leading PC VoIP programs, gaining significant communication autonomy and distance compared with Bluetooth, while DECT and WiFi consume much more power and cannot be integrated into small devices. This paper presents in a methodological way the details and performance of a voice codec implementation for Voice-over-ZigBee technology.
Apostolos Meliones - One of the best experts on this subject based on the ideXlab platform.
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ISCC - Z-Phone: Design and implementation of embedded Voice over Zigbee applications
2014 IEEE Symposium on Computers and Communications (ISCC), 2014Co-Authors: Apostolos Meliones, Emmanuel Touloupis, Jordi Perello, A. SerratAbstract:Short range Wireless technologies such as Bluetooth, WiFi and DECT are known to transmit voice, audio and/or video messages in real time. Energy consumption and transmission reach are critical in such networks, especially for portable and/or power autonomous devices. The purpose of the Voice over Zigbee technology is to provide a competitive offering that excels in these performance aspects. Due to the CSMA-CA mechanism implemented in the 802.15.4 layer a well-designed strategy must be taken into account in Zigbee to create a robust, reliable and full-duplex conversation. This article proves that the radio channel of Zigbee has enough bandwidth to support a full-duplex conversation with narrow band voice codecs. Furthermore, it presents the implementation and evaluation of a voice codec performed in the framework of the Z-Phone project, which targeted the development of a low cost, ultra low power, long range Wireless Headset using Zigbee technology to transmit voice in full-duplex mode for use with leading PC VoIP programs. Last but not least, it presents the results of the transmission range and power consumption tests involving the developed Headset prototype. Talk time is comparable to Bluetooth, but its deep-sleep lifetime doubles the Bluetooth performance. Another significant contribution of this work is towards understanding and resolving the challenges faced when trying to achieve good quality transmission of media over constrained devices and networks. The way to new voice-related Zigbee applications is open.
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Speech codecs for high-quality voice over ZigBee applications: Evaluation and implementation challenges
IEEE Communications Magazine, 2012Co-Authors: Emmanuel Touloupis, Apostolos Meliones, Spyros ApostolacosAbstract:The ZigBee standard is designed to enable the deployment of low-cost, low-power Wireless sensor and control networks based on the IEEE 802.15.4 physical radio standard. Despite the low data rates of ZigBee, its use for transmission of voice has been proven to be feasible. This article presents the evaluation and implementation of a voice codec performed in the framework of the Z-Phone project, which targeted the development of a low-cost, ultra-low-power, long-range, ergonomic Wireless Headset using ZigBee technology to transmit voice in full-duplex mode for use with leading PC VoIP programs. In particular, it presents all the criteria taken into account in selecting the most suitable codec, and also the details and performance of its implementation.
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ISCC - Implementation and evaluation of a voice codec for ZigBee
2011 IEEE Symposium on Computers and Communications (ISCC), 2011Co-Authors: Emmanuel Touloupis, Apostolos Meliones, Spyros ApostolacosAbstract:The Z-Phone project goal is to develop a low cost, ultra low-power, long range, ergonomic Wireless Headset using ZigBee Technology to transmit voice in full-duplex mode for use with leading PC VoIP programs, gaining significant communication autonomy and distance compared with Bluetooth, while DECT and WiFi consume much more power and cannot be integrated into small devices. This paper presents in a methodological way the details and performance of a voice codec implementation for Voice-over-ZigBee technology.
Spyros Apostolacos - One of the best experts on this subject based on the ideXlab platform.
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Speech codecs for high-quality voice over ZigBee applications: Evaluation and implementation challenges
IEEE Communications Magazine, 2012Co-Authors: Emmanuel Touloupis, Apostolos Meliones, Spyros ApostolacosAbstract:The ZigBee standard is designed to enable the deployment of low-cost, low-power Wireless sensor and control networks based on the IEEE 802.15.4 physical radio standard. Despite the low data rates of ZigBee, its use for transmission of voice has been proven to be feasible. This article presents the evaluation and implementation of a voice codec performed in the framework of the Z-Phone project, which targeted the development of a low-cost, ultra-low-power, long-range, ergonomic Wireless Headset using ZigBee technology to transmit voice in full-duplex mode for use with leading PC VoIP programs. In particular, it presents all the criteria taken into account in selecting the most suitable codec, and also the details and performance of its implementation.
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ISCC - Implementation and evaluation of a voice codec for ZigBee
2011 IEEE Symposium on Computers and Communications (ISCC), 2011Co-Authors: Emmanuel Touloupis, Apostolos Meliones, Spyros ApostolacosAbstract:The Z-Phone project goal is to develop a low cost, ultra low-power, long range, ergonomic Wireless Headset using ZigBee Technology to transmit voice in full-duplex mode for use with leading PC VoIP programs, gaining significant communication autonomy and distance compared with Bluetooth, while DECT and WiFi consume much more power and cannot be integrated into small devices. This paper presents in a methodological way the details and performance of a voice codec implementation for Voice-over-ZigBee technology.
