Proceedings

  • [PulSeeReiKar10] A. Pulipaka, P. Seeling, M. Reisslein, and L. J. Karam, "Overview and Traffic Characterization of Coarse-Grain Quality Scalable (CGS) H.264 SVC Encoded Video," in Proceedings of the IEEE Consumer Communications and Networking Conference (CCNC), 2010, pp. 1-5.
    @InProceedings{ PulSeeReiKar10, title = "Overview and Traffic Characterization of Coarse-Grain Quality Scalable (CGS) H.264 SVC Encoded Video", booktitle = "Proceedings of the IEEE Consumer Communications and Networking Conference {(CCNC)}",
      author = "Akshay Pulipaka and Patrick Seeling and Martin Reisslein and Lina J. Karam", pages = 1--5, month = jan, year = "2010", abstract = "The scalable video coding extension (SVC) of the H.264/AVC standard is widely considered for IPTV. SVC supports a variety of scalability modes, including temporal, spatial as well as coarse-grain and medium-grain quality scalabilities. In this paper, we first give an overview of coarse-grain quality scalability (CGS). We generate traces of CGS encodings of long CIF resolution video sequences; the traces provide a simple yet effective characterization of CGS encoded video for performance evaluation of video transport systems, including IPTV systems. We conduct a detailed statistical analysis of the CGS video traces. We compare the bit rate-distortion (RD) and the bit rate variability-distortion (VD) performances of scalable CGS encodings with those of non-scalable SVC single layer encodings. We thus quantify the tradeoff between the rate adaptability afforded by CGS encoding and the cost in terms of RD efficiency compared to non-scalable single-layer video." }
  • [See10] P. Seeling, "Work-In-Progress: Portable Student Lab Implementation," in Proceedings of the ASEE/IEEE Frontiers in Education Conference (FIE), Washington, D.C., USA, 2010.
    @InProceedings{ See10, title = "Work-In-Progress: Portable Student Lab Implementation", booktitle = "Proceedings of the ASEE/IEEE Frontiers in Education Conference ({FIE})",
      author = "Patrick Seeling", address = "Washington, D.C., USA", month = oct, year = "2010" }
  • [SeeFitErtPulRei10] P. Seeling, F. H. P. Fitzek, G. Ertli, A. Pulipaka, and M. Reisslein, "Video Network Traffic and Quality Comparison of VP8 and H.264 SVC," in ACM Multimedia 2010 Workshop – Mobile Video Delivery (MoViD), 2010.
    @InProceedings{ SeeFitErtPulRei10, title = "Video Network Traffic and Quality Comparison of VP8 and H.264 SVC", booktitle = "ACM Multimedia 2010 Workshop - Mobile Video Delivery ({MoViD})",
      author = "Patrick Seeling and Frank H.P. Fitzek and Gergo Ertli and Akshay Pulipaka and Martin Reisslein", location = "Florence, Italy", month = oct, year = "2010", abstract = "Google has recently released the video compression format VP8 to the open source community. This new compression format competes against the existing H.264 video standard developed by the ITU-T Video Coding Experts Group (VCEG) in collaboration with the ISO/IEC Moving Picture Experts Group (MPEG). This paper compares these two video coding standards in terms of video bit rate-distortion (quality) performance and the video network traffic variability with different long video sequences. We find that VP8 presently does not fulfill its promise to achieve twice the quality at half the bandwidth compared to H.264. The rate-distortion (RD) performance of VP8 is rather slightly below the RD performance of H.264. On the positive side, in contrast to H.264, VP8 has no license fees." }
  • [SeeSta09] Go to document P. Seeling and J. B. Starren, "Ad-Hoc Association of Pre-Determined ZigBee Devices," in Proc. of the Ubiquitous Mobile Healthcare Applications Workshop, Toronto, Canada, 2009.
    @InProceedings{ SeeSta09, abstract = "In pervasive sensor networks with high densities, similar networks might overlap, resulting in different coordinators for end devices to associate with. This can result in several problems, especially for home monitoring and hospital scenarios, where easy, fast, and accurate association of pre-determined devices is needed. Due to the rapidly changing environments in these scenarios, however, association schemes are required that allow ad-hoc associations of pre-determined devices in this context. In this paper, we describe the problems for this particular scenario with respect to the current standard methods of association and present multiple solutions to alleviate the problems encountered. We additionally present a generalized process flow for combining the different solutions into a single solution that can be implemented for future sensing and coordinating nodes.", address = "Toronto, Canada",
      author = "Patrick Seeling and Justin B. Starren", booktitle = "Proc. of the Ubiquitous Mobile Healthcare Applications Workshop", month = "jul", title = "Ad-Hoc Association of Pre-Determined ZigBee Devices", url = "http://patrick.seeling.org/publication-pdfs/cnf/2009_SeeSta_ZigBeeAssoc.pdf", year = "2009" }
  • [HopSee09] M. Hoppe and P. Seeling, "Security of Virtualized Applications: Microsoft App-V and VMware ThinApp," in Proc. of the Int. Joint Conferences on Computer, Information, and Systems Sciences and Engineering (CISSE), 2009.
    @InProceedings{ HopSee09, title = "Security of Virtualized Applications: Microsoft App-V and VMware ThinApp", booktitle = "Proc. of the Int. Joint Conferences on Computer, Information, and Systems Sciences and Engineering ({CISSE})",
      author = "M. Hoppe and P. Seeling", month = dec, year = "2009", abstract = "Virtualization has gained great popularity in recent years with application virtualization being the latest trend. Application virtualization offers several benefits for application management, especially for larger and dynamic deployment scenarios. In this paper, we initially introduce the common application virtualization principles before we evaluate the security of Microsoft App-V and VMware ThinApp application virtualization environments with respect to external security threats. We compare different user account privileges and levels of sandboxing for virtualized applications. Furtherwmore, we identify the major security risks as well as trade-offs with ease of use that result from the virtualization of applications." }
  • [See08] Go to document P. Seeling, "Scene Change Detection for Uncompressed Video," in Proc. of the Int. Joint Conferences on Computer, Information, and Systems Sciences and Engineering (CISSE), 2008.
    @InProceedings{ See08,
      author = "Patrick Seeling", booktitle = "Proc. of the Int. Joint Conferences on Computer, Information, and Systems Sciences and Engineering ({CISSE})", month = "dec", title = "Scene Change Detection for Uncompressed Video", url = "http://patrick.seeling.org/publication-pdfs/cnf/2008_See_SceneChanges.pdf", year = "2008" }
  • [ReiTylMatSeeRei07] M. Reisslein, D. Tylavsky, B. Matar, P. Seeling, and J. Reisslein, "Active and Cooperative Learning in a Freshman Digital Design Course: Impact on Persistence in Engineering and Student Motivational Orientation," in Proc. of ASEE/IEEE Frontiers in Education Conference (FIE), Milwaukee, WI, USA, 2007, p. s4a1-s4a6.
    @InProceedings{ ReiTylMatSeeRei07, abstract = "In an effort to retain students in the electrical and computer science/engineering programs at Arizona State University, a freshman-level introductory digital logic design course was designed with extensive active learning components in cooperative student teams as well as hardware and software (simulation) labs. This paper reports on an evaluation of the impact of the course on the persistence of the students in the program. The recently proposed persistence in engineering (PIE) survey instrument was adapted for our setting and combined with mastery, performance, and alienation survey items to obtain deeper insights into the motivational orientations of the students. The survey was conducted both at the beginning of the course and at the end of the course to assess the impact of the course on persistence and motivational orientations. Evaluation data for two years worth of offerings of the course to a diverse population of over 450 students revealed a significant positive impact of the course on student perceptions of their skills applying science and math to real-world problems as well as of their performance on teams. On the other hand, the course significantly negatively impacted the students' perceptions of the course workload and intensified their alienation motivation tendencies.", address = "Milwaukee, WI, USA",
      author = "Martin Reisslein and Daniel Tylavsky and Bassam Matar and Patrick Seeling and Jana Reisslein", booktitle = "Proc. of ASEE/IEEE Frontiers in Education Conference ({FIE})", month = "oct", pages = "S4A1--S4A6", title = "Active and Cooperative Learning in a Freshman Digital Design Course: Impact on Persistence in Engineering and Student Motivational Orientation", year = "2007" }
  • [SeeRei06] P. Seeling and M. Reisslein, "Semantically Coupled Header Compression," in Proc. of the First IEEE Workshop on Hot Topics in Web Systems and Technologies, Boston, MA, USA, 2006, pp. 1-8.
    @InProceedings{ SeeRei06, abstract = "In this paper, we evaluate the semantic coupling of header compressor and decompressor entities in our semantically coupled header compression (SCHC) scheme. We introduce the media interleave factor (MIF) to obtain an interleaving scheme for different media streams, e.g., audio and video streams. We additionally introduce the TIMES algorithm to header compression by assuming constant deltas in the headers of media streams. Exploiting the interleaving and the constant offsets in such streams, we semantically connect the (de)compressors of a framed delta coding header compression scheme to evaluate the advantage of this coupling over traditional header compression schemes using only an individual media stream. We find that our approach of semantic coupling of multiple header (de)compressors results in higher robustness for a broad range of bit error rates. We find that using our approach, expected header savings are more stable and close to the obtainable maximum savings for typical bit error rates. We additionally find that expected packet drop savings due to header compression are larger than with the traditional single stream header compression approach.", address = "Boston, MA, USA",
      author = "Patrick Seeling and Martin Reisslein", booktitle = "Proc. of the First IEEE Workshop on Hot Topics in Web Systems and Technologies", month = "nov", pages = "1--8", title = "Semantically Coupled Header Compression", year = "2006" }
  • [SeeReiFit06] P. Seeling, M. Reisslein, and F. H. P. Fitzek, "Layered Video Coding Offset Traces for Trace-Based Evaluation of Video Quality after Network Transport," in Proc. of IEEE Consumer Communications and Networking Conference (CCNC), Las Vegas, NV, USA, 2006, pp. 292-296.
    @InProceedings{ SeeReiFit06, abstract = "Currently available video traces for scalable encoded video with more than one layer are a convenient representation of the encoded video for the evaluation of networking mechanisms. The video distortion (RMSE) or quality (PSNR) for individual video frames in these traces, however, only allow for the calculation of the video quality of correctly received video frames; for lossy network transport, only a rough approximation can be made. With the availability of scalable offset distortion traces, which we introduce and evaluate in this paper, networking researchers are enabled to accurately calculate the video quality of scalable encoded video as it is perceived by the receiving client after lossy network transport.", address = "Las Vegas, NV, USA",
      author = "Patrick Seeling and Martin Reisslein and Frank H.P. Fitzek", booktitle = "Proc. of IEEE Consumer Communications and Networking Conference {(CCNC)}", pages = "292--296", title = "Layered Video Coding Offset Traces for Trace-Based Evaluation of Video Quality after Network Transport", volume = "1", year = "2006" }
  • [SeeRei06-1] Go to document P. Seeling and M. Reisslein, "Video Pricing for Wireless Networks," in Proc. of IEEE Consumer Communications and Networking Conference (CCNC), Las Vegas, NV, USA, 2006, pp. 749-753.
    @InProceedings{ SeeRei06-1, abstract = "The development of pricing schemes that account for the specific challenges in streaming video to wireless clients is one of the key requirements for making wireless video services economically viable. In this paper we develop a conceptual framework for the pricing of wireless video streaming. Our framework incorporates the quality of the delivered video in the given networking context in an earnings model and captures the costs for the video service in a cost model. We discuss these models in the context of cellular, WLAN, and multi-hop wireless networks. We illustrate the developed pricing framework through numerical experiments with videos of a range of quality levels.", address = "Las Vegas, NV, USA",
      author = "Patrick Seeling and Martin Reisslein", booktitle = "Proc. of IEEE Consumer Communications and Networking Conference {(CCNC)}", month = "jan", pages = "749--753", title = "Video Pricing for Wireless Networks", url = "http://patrick.seeling.org/publications/cnf/2006_SeeRei_VideoPricing.pdf", volume = "2", year = "2006" }
  • [ReiReiSee05] M. Reisslein, J. Reisslein, and P. Seeling, "A Course on Multimedia QoS Networking: Transition to Hybrid Offering and Comparative Evaluation," in Proc. of ASEE/IEEE Frontiers in Education Conference (FIE), Indianapolis, IN, USA, 2005, p. s3h1-s3h3.
    @InProceedings{ ReiReiSee05, abstract = "A companion paper describes the development and evaluation of the on-campus format of a novel Multimedia QoS Networking course that introduces students to the basic principles and current developments in this emerging field through a combination of lecture, topic exploration, and paper critiquing and discussion. This paper presents: (i) the transformation of the course from the on-campus-only format to a hybrid on-campus/distance learning format, and (ii) the comparative evaluation of the two formats and different forms of the paper critique discussions in the hybrid format. While the lecture (40\% of class time) and topic exploration (30\% of class time) components could be transformed with standard approaches to the hybrid on-campus/distance education with streaming class video format, the transformation of the highly interactive paper critique discussions (30\% of class time), which are crucial for developing a deep understanding of the course content, proved challenging. Three different forms of the paper critique discussion were tested and evaluated: 1) in-class discussion (with distance students visiting the campus or viewing the video of the recorded discussion), 2) asynchronous Web-based discussion board, and 3) synchronous Web-based live chat. The two course formats as well as the different forms of the paper critique discussion in the hybrid course format were evaluated through extensive student surveys and interviews. The results indicate that student attitudes were approximately equally positive toward both course formats. There was a tendency for the asynchronous discussions to be perceived more positively in terms of learning effectiveness and effectiveness of interaction with the peers than the live chat discussion, while the live chat was preferred in terms of interaction with the instructor. These results and the reported student feedback to the open-ended survey questions and the interviews provide valuable guidance for designing interactive seminar-s- - tyle courses on emerging topics in a hybrid format.", address = "Indianapolis, IN, USA",
      author = "Martin Reisslein and Jana Reisslein and Patrick Seeling", booktitle = "Proc. of ASEE/IEEE Frontiers in Education Conference (FIE)", month = "oct", pages = "S3H1--S3H3", title = "A Course on Multimedia QoS Networking: Transition to Hybrid Offering and Comparative Evaluation", year = "2005" }
  • [ReiSeeRei05] J. Reisslein, P. Seeling, and M. Reisslein, "Work-In-Progress: Effectiveness of Worked Examples and Fading in Introductory Electrical Circuit Analysis for Learners of Different Ability Levels," in Proc. of ASEE/IEEE Frontiers in Education Conference (FIE), Indianapolis, IN, 2005, p. s2h1-s2h2.
    @InProceedings{ ReiSeeRei05, abstract = "This paper reports on work in progress to examine and improve the effectiveness of instructional sequences containing worked examples and fading solution steps in the domain of introductory electrical circuit analysis. We pay close attention to the ability levels of the learners, which have not been considered in detail in previous studies on fading. Our preliminary results indicate that different static paces of fading or adaptive fading can make instructional sequences with fading more effective for learners with a range of ability levels.", address = "Indianapolis, IN",
      author = "Jana Reisslein and Patrick Seeling and Martin Reisslein", booktitle = "Proc. of ASEE/IEEE Frontiers in Education Conference (FIE)", month = "oct", pages = "S2H1--S2H2", title = "Work-In-Progress: Effectiveness of Worked Examples and Fading in Introductory Electrical Circuit Analysis for Learners of Different Ability Levels", year = "2005" }
  • [ReiReiSeeYan05] M. Reisslein, J. Reisslein, P. Seeling, and H. Yang, "A Course on Multimedia QoS Networking: Development and Evaluation of On-Campus Offering," in Proc. of ASEE/IEEE Frontiers in Education Conference (FIE), Indianapolis, IN, USA, 2005, p. s1j1-s1j6.
    @InProceedings{ ReiReiSeeYan05, abstract = "Multimedia networking applications are becoming increasingly popular and the ongoing research in this field is providing a progressively more sophisticated understanding of the underlying principles of providing quality of service (QoS) for networked multimedia applications. To provide education in this emerging area, which is of increasing importance for electrical, computer, and industrial engineers, a course on Multimedia QoS Networking has been developed at Arizona State University. To provide the students with a balanced education in the fundamental principles and in the current development trends the course structure has three components: 1) lecture (40\% of class contact time), in which the instructor presents the basic principles, 2) topic exploration (30\% of contact time), which expands on the basic principles and explores current trends through student presentations, and 3) paper critique, in which the readings from the recent literature are critically evaluated and examined in instructor-led discussions (30\% of contact time). The on-campus offering of the course was evaluated through the assessment of student work, student surveys, and student interviews. The assessment indicates the students were very positive toward the course structure, especially the paper critiques and their in-class discussions.", address = "Indianapolis, IN, USA",
      author = "Martin Reisslein and Jana Reisslein and Patrick Seeling and Hyo-Sik Yang", booktitle = "Proc. of ASEE/IEEE Frontiers in Education Conference (FIE)", month = "oct", pages = "S1J1--S1J6", title = "A Course on Multimedia QoS Networking: Development and Evaluation of On-Campus Offering", year = "2005" }
  • [SchSeeMaiRei05] M. Scheutzow, P. Seeling, M. Maier, and M. Reisslein, "Multicast Capacity of Packet-Switched Ring WDM Networks," in Proc. of IEEE INFOCOM, Miami, FL, 2005, pp. 706-717.
    @InProceedings{ SchSeeMaiRei05, abstract = "Packet-switched unidirectional and bidirectional ring wavelength division multiplexing (WDM) networks with destination stripping provide an increased capacity due to spatial wavelength reuse. Besides unicast traffic, future destination stripping ring WDM networks also need to support multicast traffic efficiently. In this paper, we provide a probabilistic analysis of the mean hop distances traveled by multicast packet copies on the wavelength channels, and based on the mean hop distances analyze the nominal transmission capacity, reception capacity, and multicast capacity of both unidirectional and bidirectional ring WDM networks with destination stripping. The developed analytical methodology accommodates not only multicast traffic with arbitrary multicast fanout but also unicast and broadcast traffic. In our numerical investigations we examine the impact of number of ring nodes and multicast fanout on the transmission, reception, and multicast capacity of both types of ring networks for different unicast, multicast, and broadcast traffic scenarios and different mixes of unicast and multicast traffic. Our analytical methodology provides a foundation for extended analyses of the multicast capacity of WDM ring networks and enables the evaluation and comparison of future multicast-capable medium access control (MAC) protocols for unidirectional and bidirectional ring WDM networks in terms of transmitter, receiver, and multicast throughput efficiency.", address = "Miami, FL",
      author = "Michael Scheutzow and Patrick Seeling and Martin Maier and Martin Reisslein", booktitle = "Proc. of IEEE INFOCOM", month = "mar", pages = "706--717", title = "Multicast Capacity of Packet-Switched Ring WDM Networks", volume = "1", year = "2005" }
  • [SeeRei05-2] P. Seeling and M. Reisslein, "Video Offset Distortion Descriptors for Trace-Based Evaluation of Video Quality after Network Transport," in Proc. of IEEE International Conference on Computer Communications and Networks (ICCCN), San Diego, CA, USA, 2005, pp. 375-380.
    @InProceedings{ SeeRei05-2, abstract = "Video traces containing the sizes and (PSNR) qualities of the individual frames of a video encoding are a convenient video representation for the evaluation of video networking mechanisms. These video traces can be used to find the frame loss probabilities of a lossy networking mechanism, but can not give the PSNR video quality after lossy network transport. To date the video quality after lossy network transport could only be determined through experiments with actual video or by approximating the quality of the frames affected by a loss with some low PSNR quality. In this paper we introduce and evaluate offset distortion traces with which the video quality after lossy network transport can be accurately determined without requiring experiments with actual video. We explain how the offset distortion traces can be used by networking researchers without equipment or experience in video signal processing to accurately evaluate video networking mechanisms in terms of the PSNR video quality.", address = "San Diego, CA, USA",
      author = "Patrick Seeling and Martin Reisslein", booktitle = "Proc. of IEEE International Conference on Computer Communications and Networks (ICCCN)", month = "oct", pages = "375--380", title = "Video Offset Distortion Descriptors for Trace-Based Evaluation of Video Quality after Network Transport", year = "2005" }
  • [SeeRei05-1] P. Seeling and M. Reisslein, "Video Coding with Multiple Descriptors and Spatial Scalability for Device Diversity in Wireless Multi-hop Networks," in Proc. of IEEE Consumer Communications and Networking Conference (CCNC), Las Vegas, NV, USA, 2005, pp. 278-283.
    @InProceedings{ SeeRei05-1, abstract = "Providing video services to heterogeneous clients in wireless ad hoc networks is particularly challenging as (i) the heterogeneous client processing and display capabilities typically prevent clients from processing and displaying the same encoded video information, and (ii) wireless connections typically suffer from bandwidth variability and transmission errors. We jointly address these two challenges by introducing a novel video coding strategy which combines multiple description coding, in particular temporal descriptors, with layered spatial coding. Our spatial scalable descriptor coding strategy enables heterogeneous clients in wireless multi-hop networks with path diversity to receive preencoded video streams over independent paths and to process only that amount of encoded video information that suits their processing and display capabilities. We evaluate our coding strategy through simulation experiments with a highly dynamic video sequence. We find that our coding strategy with two descriptors improves the quality of the received video by approximately 4 dB and cuts the quality variability approximately in half compared to layered coding.", address = "Las Vegas, NV, USA",
      author = "Patrick Seeling and Martin Reisslein", booktitle = "Proc. of IEEE Consumer Communications and Networking Conference {(CCNC)}", month = "jan", pages = "278--283", title = "Video Coding with Multiple Descriptors and Spatial Scalability for Device Diversity in Wireless Multi-hop Networks", year = "2005" }
  • [FitSeeReiRugZor04] F. H. P. Fitzek, P. Seeling, M. Reisslein, R. Rugin, and M. Zorzi, "A Visualisation Tool for Ad Hoc Networks: ViTAN," in Proc. of the 7th International Symposium on Wireless Personal Multimedia Communications (WPMC), Abano Terme, Italy, 2004, pp. 161-164.
    @InProceedings{ FitSeeReiRugZor04, address = "Abano Terme, Italy",
      author = "Frank H.P. Fitzek and Patrick Seeling and Martin Reisslein and R. Rugin and Michele Zorzi", booktitle = "Proc. of the 7th International Symposium on Wireless Personal Multimedia Communications ({WPMC})", month = "sep", pages = "161--164", title = "A Visualisation Tool for Ad Hoc Networks: ViTAN", volume = "1", year = "2004" }
  • [FitSeeRei04] F. H. P. Fitzek, P. Seeling, and M. Reisslein, "Video and Audio Trace Files of Pre-encoded Video Content for Network Performance Measurements," in Proceedings of the IEEE Consumer Communications and Networking Conference (CCNC 04), Las Vegas, NV, 2004, pp. 245-250.
    @InProceedings{ FitSeeRei04, abstract = "Video services are expected to account for a large portion of the traffic in future wireless networks. Therefore, realistic traffic sources are needed to investigate the network performance of future communication protocols. Previously, we provided a publicly available library of frame size traces of long MPEG-4 and H.263 encoded videos in the QCIF format resulting in low bandwidth video streams. These traces can be used in 3G network simulations. Some future communication systems, such as WLAN systems, offer high data rates and therefore high quality video can be transmitted over such higher speed networks. We now present an addition to our existing trace library. For this addition we collected over 100 pre-encoded video sequences from the Web, generated the trace files, and conducted a thorough statistical evaluation. Because the pre-encoded video sequences are encoded by different users, their video settings differ in terms of codec, quality, format, and length. The advantage of user diversity for encoding is that it reflects very well the traffic situation in upcoming WLANs. Thus, the new traces are very suitable for the network performance evaluation of future WLANs.", address = "Las Vegas, NV",
      author = "Frank H.P. Fitzek and Patrick Seeling and Martin Reisslein", booktitle = "Proceedings of the IEEE Consumer Communications and Networking Conference {(CCNC 04)}", month = "jan", pages = "245--250", title = "Video and Audio Trace Files of Pre-encoded Video Content for Network Performance Measurements", volume = "1", year = "2004" }
  • [KulSeeRei04] B. Kulapala, P. Seeling, and M. Reisslein, "Comparison of Traffic and Quality Characteristics of Rate-Controlled Wavelet and DCT Video," in Proc. of IEEE International Conference on Computer Communications and Networks (ICCCN), Chicago, IL, USA, 2004, pp. 247-252.
    @InProceedings{ KulSeeRei04, abstract = "Wavelet-based encoding is now emerging as an efficient way to encode video for streaming over the Internet and for wireless applications. ``Wavelet-based video coding has been recently added to the JPEG-2000 video standards. As wavelet encoded video emerges as the next generation video encoding method, it is vital to compare the efficiency of wavelet encoded video against the widely used DCT-based MPEG encoded video. However, due to the lack of long wavelet encoded video streams, most research has so far been based on short video traces. This paper presents a comparison study on MPEG vs wavelet encoded video traces for one hour movie excerpts with rate control. These long video sequences allow for the evaluation of long range dependency and self similarity of the generated video traffic, which has not been studied before in the context of comparing DCT and wavelet-based encoding. We focus on the elementary as well as self-similar traffic characteristics of the encoded video. A hump behavior for the variability of frame sizes is observed for increasing video bit rates for both wavelet and MPEG encoded video. In addition, the quality characteristics of the encoded video is examined and related to the traffic. Our results indicate that the wavelet encoded video results in higher video quality than MPEG encoded video. For the frame size variability we find different characteristics depending on the aggregation level for a given data rate. The results also indicate that the variation of quality resulting from the wavelet encoding is lower than for the MPEG encoded video.", address = "Chicago, IL, USA",
      author = "Beshan Kulapala and Patrick Seeling and Martin Reisslein", booktitle = "Proc. of IEEE International Conference on Computer Communications and Networks (ICCCN)", month = "oct", pages = "247--252", title = "Comparison of Traffic and Quality Characteristics of Rate-Controlled Wavelet and DCT Video", year = "2004" }
  • [FitBadSeeSchHen03] Go to document F. H. P. Fitzek, L. Badia, P. Seeling, G. Schulte, and T. Henderson, "Mobility and Stability Evaluation in Wireless Multi-Hop Networks Using Multiplayer Games," in Proceedings of NetGames 2003, Redwood City, CA, 2003, pp. 77-87.
    @InProceedings{ FitBadSeeSchHen03, abstract = "Multi-hop networks have gained a lot of interest in recent years. A lot of work was contributed in the field of protocol design and performance of multi-hop networks. It is generally accepted that mobility has a huge impact on the protocol performance; even more for multi-hop networks. Obtaining realistic measurements of mobility, however, is complex and expensive. Thus, we adopt virtual world scenarios to explore the mobility issue, by using the well-known multi-player game, Quake II. The advantage of the Quake II engine is that users move within virtual worlds under realistic constraints, whereas other mobility models may offer insufficient accuracy or operate under unrealistic assumptions. Moreover, it is very easy to create new virtual worlds and to adapt them to specialized needs. In this paper, we propose an analytical framework for mobility measurements in virtual worlds that could be adopted for the design of communication protocols. Our framework enables the study of the impact of mobility on connectivity and stability of the network, giving useful insights for improving communication performance. An interesting application of our approach is the analysis of coverage extension of so called hotspots or emergency situations, where the fixed network infrastructure is insufficient or non-existent. In these extreme cases, multi-hop networks can be used to setup communication quickly. As these situations comprise a plethora of different cases and scenarios, our model is appropriate for their analysis, due to its generality. We use our framework to investigate the performance of multi-hop networks based on IEEE 802.11a technology. In contrast to other contributions focusing only on connectivity, the IEEE 802.11a technology also considers multi-rate connections. Our framework covers the evaluation of simple connectivity as well as link quality stability in the presence of mobility, a combination that has not been considered thus far. Therefore we introduce two simple routing schemes and highlight the performance of these protocols in presence of mobility. Furthermore we come up with four definitions of stability and investigate protocols for multi-hop networks in terms of this parameter. Our other contributions are the changes to the Quake II engine and the availability of mobility trace files.", address = "Redwood City, CA",
      author = "Frank H.P. Fitzek and Leonardo Badia and Patrick Seeling and Gerrit Schulte and Tristan Henderson", booktitle = "Proceedings of NetGames 2003", month = "may", pages = "77--87", title = "Mobility and Stability Evaluation in Wireless Multi-Hop Networks Using Multiplayer Games", url = "http://patrick.seeling.org/publications/cnf/2003_FitBadZorSchSeeHen_NetGames.pdf", year = "2003" }
  • [SeeReiFitHen03] P. Seeling, M. Reisslein, F. H. P. Fitzek, and S. Hendrata, "Video Quality Evaluation for Wireless Transmisison with Robust Header Compression," in Proceedings of the IEEE Fourth International Conference on Information, Communications \& Signal Processing and Fourth IEEE Pacific-Rim Conference On Multimedia (ICICS-PCM 03), Singapore, 2003, pp. 1346-1350.
    @InProceedings{ SeeReiFitHen03, abstract = "Robust header compression (ROHC), an IP header compression mechanism for wireless environments, was recently standardized by the Internet Engineering Task Force in RFC 3095 and an integral part of the 3GPP-UMTS specifications. In this paper we conduct a thorough performance evaluation of video transmission over wireless links with ROHC. We find that ROHC can achieve significant bandwidth reductions for wireless video transmission. We demonstrate that the achieved compression depends to a large degree on the video content. We also demonstrate that ROHC does not affect the video quality. This is in contrast to recent ROHC evaluations for wireless voice transmissions, which indicate that ROHC does improve the voice quality.", address = "Singapore",
      author = "Patrick Seeling and Martin Reisslein and Frank H.P. Fitzek and Stefan Hendrata", booktitle = "Proceedings of the IEEE Fourth International Conference on Information, Communications \& Signal Processing and Fourth IEEE Pacific-Rim Conference On Multimedia {(ICICS-PCM 03)}", month = "dec", pages = "1346--1350", title = "Video Quality Evaluation for Wireless Transmisison with Robust Header Compression", volume = "3", year = "2003" }
  • [FitSeeRei02] F. H. P. Fitzek, P. Seeling, and M. Reisslein, "Reference Models and Related Business Cases for Ad-Hoc Networks," in Proceedings of the Wireless World Research Forum 6 (WWRF6), London, UK, 2002.
    @InProceedings{ FitSeeRei02, address = "London, UK",
      author = "Frank H.P. Fitzek and Patrick Seeling and Martin Reisslein", booktitle = "Proceedings of the Wireless World Research Forum 6 (WWRF6)", month = "jun", title = "Reference Models and Related Business Cases for Ad-Hoc Networks", year = "2002" }
  • [FitSeeRei02a] F. H. P. Fitzek, P. Seeling, and M. Reisslein, "Authentication and Security in IP based Multi–Hop Networks," in Proceedings of the Wireless World Research Forum 7 (WWRF7), Eindnoven, Netherlands, 2002.
    @InProceedings{ FitSeeRei02a, address = "Eindnoven, Netherlands",
      author = "Frank H.P. Fitzek and Patrick Seeling and Martin Reisslein", booktitle = "Proceedings of the Wireless World Research Forum 7 (WWRF7)", month = "dec", title = "Authentication and Security in IP based Multi--Hop Networks", year = "2002" }
  • [FitSeeRei02ab] F. H. P. Fitzek, P. Seeling, and M. Reisslein, "Link Level Design Issues for IP based Multi–Hop Communication Systems," in Proceedings of the Wireless World Research Forum 7 (WWRF7), Eindnoven, NL, 2002.
    @InProceedings{ FitSeeRei02ab, address = "Eindnoven, NL",
      author = "Frank H.P. Fitzek and Patrick Seeling and Martin Reisslein", booktitle = "Proceedings of the Wireless World Research Forum 7 (WWRF7)", month = "dec", title = "Link Level Design Issues for IP based Multi--Hop Communication Systems", year = "2002" }

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