ºÝºÝߣshows by User: BURAKizmeci / http://www.slideshare.net/images/logo.gif ºÝºÝߣshows by User: BURAKizmeci / Fri, 27 Oct 2017 08:41:51 GMT ºÝºÝߣShare feed for ºÝºÝߣshows by User: BURAKizmeci A Multiplexing Scheme for Multimodal Teleoperation https://de.slideshare.net/slideshow/a-multiplexing-scheme-for-multimodal-teleoperation/81275333 phddefenseburak-171027084151
Ph.D. defense presentation of Burak Cizmeci on 14.09.2017]]>
Ph.D. defense presentation of Burak Cizmeci on 14.09.2017]]> Fri, 27 Oct 2017 08:41:51 GMT https://de.slideshare.net/slideshow/a-multiplexing-scheme-for-multimodal-teleoperation/81275333 BURAKizmeci@slideshare.net(BURAKizmeci) A Multiplexing Scheme for Multimodal Teleoperation BURAKizmeci Ph.D. defense presentation of Burak Cizmeci on 14.09.2017 <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/phddefenseburak-171027084151-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Ph.D. defense presentation of Burak Cizmeci on 14.09.2017
from BURAK Çizmeci
]]> 128 4 https://cdn.slidesharecdn.com/ss_thumbnails/phddefenseburak-171027084151-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Macroblock Level Rate Control for Low Delay H.264/AVC based Video Communication /slideshow/pcs-pvw-presentation/49073570 pcspvwpresentation-150606171757-lva1-app6892
We propose a macro-block (MB) level rate control algorithm for low delay H.264/AVC video communication which is based on the rho domain rate model. In our approach, an exponential model is used to characterize the relation between rho and the quantization step (Qstep) at the MB level, from which the quantization parameter (QP) for a MB can be obtained. Furthermore, a switched QP calculation scheme is introduced which prevents large deviations of the actual frame size from the target bit budget. Compared with the original rho domain rate control algorithm, the proposed method can achieve better video quality and improved bit-rate accuracy. Additionally, the computational complexity is also significantly reduced.]]>
We propose a macro-block (MB) level rate control algorithm for low delay H.264/AVC video communication which is based on the rho domain rate model. In our approach, an exponential model is used to characterize the relation between rho and the quantization step (Qstep) at the MB level, from which the quantization parameter (QP) for a MB can be obtained. Furthermore, a switched QP calculation scheme is introduced which prevents large deviations of the actual frame size from the target bit budget. Compared with the original rho domain rate control algorithm, the proposed method can achieve better video quality and improved bit-rate accuracy. Additionally, the computational complexity is also significantly reduced.]]> Sat, 06 Jun 2015 17:17:57 GMT /slideshow/pcs-pvw-presentation/49073570 BURAKizmeci@slideshare.net(BURAKizmeci) Macroblock Level Rate Control for Low Delay H.264/AVC based Video Communication BURAKizmeci We propose a macro-block (MB) level rate control algorithm for low delay H.264/AVC video communication which is based on the �rho domain rate model. In our approach, an exponential model is used to characterize the relation between �rho and the quantization step (Qstep) at the MB level, from which the quantization parameter (QP) for a MB can be obtained. Furthermore, a switched QP calculation scheme is introduced which prevents large deviations of the actual frame size from the target bit budget. Compared with the original rho domain rate control algorithm, the proposed method can achieve better video quality and improved bit-rate accuracy. Additionally, the computational complexity is also significantly reduced. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/pcspvwpresentation-150606171757-lva1-app6892-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> We propose a macro-block (MB) level rate control algorithm for low delay H.264/AVC video communication which is based on the �rho domain rate model. In our approach, an exponential model is used to characterize the relation between �rho and the quantization step (Qstep) at the MB level, from which the quantization parameter (QP) for a MB can be obtained. Furthermore, a switched QP calculation scheme is introduced which prevents large deviations of the actual frame size from the target bit budget. Compared with the original rho domain rate control algorithm, the proposed method can achieve better video quality and improved bit-rate accuracy. Additionally, the computational complexity is also significantly reduced.
Macroblock Level Rate Control for Low Delay H.264/AVC based Video Communication from BURAK Çizmeci
]]> 993 2 https://cdn.slidesharecdn.com/ss_thumbnails/pcspvwpresentation-150606171757-lva1-app6892-thumbnail.jpg?width=120&height=120&fit=bounds presentation 000000 http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 On the Discrimination of Stiffness during Pressing and Pinching of Virtual Springs /slideshow/stiffnessdisc-have/40144341 stiffnessdischave-141011085151-conversion-gate01
In this paper, we study the perception of stiffness while pressing and pinching virtual springs. These exploration events are highly relevant for telerobotics, but their influence on stiffness perception is largely unexplored. Our study contributes to the understanding of the limits of stiffness perception for human-robot interactions. According to our experiments, mean Weber fraction values between 0:134 and 0:166 are obtained for a reference stiffness value of 200 N/m. Our results also show that the differential sensitivity for stiffness is not significantly affected by the actual exploration event. To test the constancy of the extracted Weber fraction values five further reference stiffness values are evaluated suggesting a constant stiffness sensitivity value in the range of stiffness between 135 and 390 N/m.]]>
In this paper, we study the perception of stiffness while pressing and pinching virtual springs. These exploration events are highly relevant for telerobotics, but their influence on stiffness perception is largely unexplored. Our study contributes to the understanding of the limits of stiffness perception for human-robot interactions. According to our experiments, mean Weber fraction values between 0:134 and 0:166 are obtained for a reference stiffness value of 200 N/m. Our results also show that the differential sensitivity for stiffness is not significantly affected by the actual exploration event. To test the constancy of the extracted Weber fraction values five further reference stiffness values are evaluated suggesting a constant stiffness sensitivity value in the range of stiffness between 135 and 390 N/m.]]> Sat, 11 Oct 2014 08:51:51 GMT /slideshow/stiffnessdisc-have/40144341 BURAKizmeci@slideshare.net(BURAKizmeci) On the Discrimination of Stiffness during Pressing and Pinching of Virtual Springs BURAKizmeci In this paper, we study the perception of stiffness while pressing and pinching virtual springs. These exploration events are highly relevant for telerobotics, but their influence on stiffness perception is largely unexplored. Our study contributes to the understanding of the limits of stiffness perception for human-robot interactions. According to our experiments, mean Weber fraction values between 0:134 and 0:166 are obtained for a reference stiffness value of 200 N/m. Our results also show that the differential sensitivity for stiffness is not significantly affected by the actual exploration event. To test the constancy of the extracted Weber fraction values five further reference stiffness values are evaluated suggesting a constant stiffness sensitivity value in the range of stiffness between 135 and 390 N/m. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/stiffnessdischave-141011085151-conversion-gate01-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> In this paper, we study the perception of stiffness while pressing and pinching virtual springs. These exploration events are highly relevant for telerobotics, but their influence on stiffness perception is largely unexplored. Our study contributes to the understanding of the limits of stiffness perception for human-robot interactions. According to our experiments, mean Weber fraction values between 0:134 and 0:166 are obtained for a reference stiffness value of 200 N/m. Our results also show that the differential sensitivity for stiffness is not significantly affected by the actual exploration event. To test the constancy of the extracted Weber fraction values five further reference stiffness values are evaluated suggesting a constant stiffness sensitivity value in the range of stiffness between 135 and 390 N/m.
On the Discrimination of Stiffness during Pressing and Pinching of Virtual Springs from BURAK Çizmeci
]]> 711 3 https://cdn.slidesharecdn.com/ss_thumbnails/stiffnessdischave-141011085151-conversion-gate01-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Eurohaptics 2014- A Visual-Haptic Multiplexing Scheme for Teleoperation over Constant Bitrate Communication Links /slideshow/eurohaptics-2014-36544402/36544402 eurohaptics2014-140702043703-phpapp02
We propose a novel multiplexing scheme for teleoperation over constant bitrate (CBR) communication links. The proposed approach uniformly divides the channel into 1 ms resource buckets and controls the size of the transmitted video packets as a function of the irregular haptic transmission events generated by a perceptual haptic data reduction approach. The performance of the proposed multiplexing scheme is measured objectively in terms of delay-jitter and packet rates. The results show that acceptable multiplexing delays on both the visual and haptic streams are achieved. Our evaluation shows that the proposed approach can provide a guaranteed constant delay for the time-critical force signal, while introducing acceptable video delay.]]>
We propose a novel multiplexing scheme for teleoperation over constant bitrate (CBR) communication links. The proposed approach uniformly divides the channel into 1 ms resource buckets and controls the size of the transmitted video packets as a function of the irregular haptic transmission events generated by a perceptual haptic data reduction approach. The performance of the proposed multiplexing scheme is measured objectively in terms of delay-jitter and packet rates. The results show that acceptable multiplexing delays on both the visual and haptic streams are achieved. Our evaluation shows that the proposed approach can provide a guaranteed constant delay for the time-critical force signal, while introducing acceptable video delay.]]> Wed, 02 Jul 2014 04:37:03 GMT /slideshow/eurohaptics-2014-36544402/36544402 BURAKizmeci@slideshare.net(BURAKizmeci) Eurohaptics 2014- A Visual-Haptic Multiplexing Scheme for Teleoperation over Constant Bitrate Communication Links BURAKizmeci We propose a novel multiplexing scheme for teleoperation over constant bitrate (CBR) communication links. The proposed approach uniformly divides the channel into 1 ms resource buckets and controls the size of the transmitted video packets as a function of the irregular haptic transmission events generated by a perceptual haptic data reduction approach. The performance of the proposed multiplexing scheme is measured objectively in terms of delay-jitter and packet rates. The results show that acceptable multiplexing delays on both the visual and haptic streams are achieved. Our evaluation shows that the proposed approach can provide a guaranteed constant delay for the time-critical force signal, while introducing acceptable video delay. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/eurohaptics2014-140702043703-phpapp02-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> We propose a novel multiplexing scheme for teleoperation over constant bitrate (CBR) communication links. The proposed approach uniformly divides the channel into 1 ms resource buckets and controls the size of the transmitted video packets as a function of the irregular haptic transmission events generated by a perceptual haptic data reduction approach. The performance of the proposed multiplexing scheme is measured objectively in terms of delay-jitter and packet rates. The results show that acceptable multiplexing delays on both the visual and haptic streams are achieved. Our evaluation shows that the proposed approach can provide a guaranteed constant delay for the time-critical force signal, while introducing acceptable video delay.
Eurohaptics 2014- A Visual-Haptic Multiplexing Scheme for Teleoperation over Constant Bitrate Communication Links from BURAK Çizmeci
]]> 1341 3 https://cdn.slidesharecdn.com/ss_thumbnails/eurohaptics2014-140702043703-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds presentation 000000 http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 https://cdn.slidesharecdn.com/profile-photo-BURAKizmeci-48x48.jpg?cb=1571301918 Burak Cizmeci received his B.Sc. degree in Electronics Engineering in 2007, B.Sc. degree in Computer Engineering in 2008 and master of science degree in 2009 both from Isik University, Istanbul, Turkey. He worked as a teaching assistant at the department of electronics engineering of Isik University from 2007 to 2010. During his master studies, he actively worked on video analysis, coding, de-noising, frame rate up-conversion and super-resolution. In September 2010, he joined the Media Technology Group at the Technische Universität München (Germany) to pursue his Ph.D. degree as a DAAD (German Academic Exchange Service) scholarship holder. Currently, he is working in an ERC (European Res. http://www.lmt.ei.tum.de/ https://cdn.slidesharecdn.com/ss_thumbnails/phddefenseburak-171027084151-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/a-multiplexing-scheme-for-multimodal-teleoperation/81275333 A Multiplexing Scheme ... https://cdn.slidesharecdn.com/ss_thumbnails/pcspvwpresentation-150606171757-lva1-app6892-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/pcs-pvw-presentation/49073570 Macroblock Level Rate ... https://cdn.slidesharecdn.com/ss_thumbnails/stiffnessdischave-141011085151-conversion-gate01-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/stiffnessdisc-have/40144341 On the Discrimination ...