Live Video Transmission Research Articles

Analytical Modeling for Delay-Sensitive Video Over WLAN

Delay-sensitive video transmission over IEEE 802.11 wireless local area networks (WLANs) is analyzed in a cross-layer optimization framework. The effect of delay constraint on the quality of received packets is studied by analyzing “expired-time packet discard rate”. Three analytical models are examined and it is shown that M/M/1 model is quite an adequate model for analyzing delay-limited applications such as live video transmission over WLAN. The optimal MAC retry limit corresponding to the minimum “total packet loss rate” is derived by exploiting both mathematical analysis and NS-2 simulations. We have shown that there is an interaction between "packet overflow drop" and "expired-time packet discard" processes in the queue. Subsequently, by introducing the concept of virtual buffer size, we will obtain the optimal buffer size in order to avoid "packet overflow drop". We finally introduced a simple and yet effective real-time algorithm for retry-limit adaptation over IEEE 802.11 MAC in order to maintain a loss protection for delay-critical video traffic transmission, and showed that the average link-layer throughput can be improved by using our adaptive scheme.

A quality-driven decision engine for live video transmission under service-oriented architecture

Service-oriented architecture provides a solution to the increasing network complexity due to ever-growing heterogeneous networks. As the most significant component of SOA, the decision engine is to create a workflow, defined as a sequence of individual data processing entities, for providing end-to-end QoS of a given task. Although the workflow of video transmission is generally known, existing solutions are often monolithic. Furthermore, there is no decision engine to select a workflow based on the best user-perceived quality. In this article we propose a service-oriented decision engine framework, which consists of a decision engine, a performance evaluation component, and other major SOA components to support real-time video transmission over wireless multihop networks, aiming to provide the best user-perceived video quality under application-centric QoS constraints. Based on the investigation of the state of- the-art research efforts on SOA, some key issues for wireless live video transmission are discussed, and a case study for live video transmission is given to illustrate the proposed scheme. The superior performance of the proposed service-oriented decision engine is validated by experimental results.

Service-oriented design for broadband wireless networks - [Message from the Editor-in-Chief

The paper gives an introduction to the collection of articles in this publication that includes: security in a service-oriented vehicular networks; multipath routing for multiple description video communications over wireless mesh networks; using P2P overlays to provide QoS in service-oriented wireless networks; network-coding-based scheduling and routing schemes for service-oriented wireless mesh; quality-driven decision engine for live video transmission under service-oriented architecture; dynamic composition of services for end-to-end information transport; topology control for service-oriented wireless mesh networks; and downlink scheduling for multimedia multicast/broadcast over mobile WiMAX.

On modeling and evaluating multicomputer transcoding architectures for live-video streams

The pervasive and ubiquitous computing has motivated researches on multimedia adaptation which aims at matching the video quality to the user needs and device restrictions. This technique has a high computational cost which needs to be studied and estimated when designing architectures and applications. This paper presents an analytical model to quantify these video transcoding costs in a hardware independent way. The model was used to analyze the impact of transcoding delays in end-to-end live-video transmissions over LANs, MANs and WANs. Experiments confirm that the proposed model helps to define the best transcoding architecture for different scenarios.

Cardiac Calendar—2007 to 2009

Twentieth Annual Congress European Society of Intensive Care. Berlin, Germany. October 7-10, 2007. Contact: ESICM, 40 Ave, Joseph Wybran, B-1070 Brussels, Belgium, www.esicm.org. ASA Annual Meeting. San Francisco, CA. October 13-17, 2007. Contact: ASA, 520 N Northwest Highway, Park Ridge, IL 60068, www.asahq.org. Seventh Meeting of the Asian Society of Cardiothoracic Anesthesia. New Delhi, India. October 26-28, 2007. Contact: Department of Anesthesiology, Escort Heart Institute, Okla Road, New Delhi 110025, India, e-mail: [email protected] . Fifteenth ASEAN Congress of Anesthesiologists. Pattaya, Thailand. November 10-13, 2007. Contact: Lawson–Marsh Co, 1/70-71 Paholyotin Soi 40 Ladyo Jatujak, Bangkok 10900, Thailand. Eighteenth Biennal Congress Association of Thoracic and Cardiovascular Surgeons of Asia (ATCSA). Bali, Indonesia. November 25-28, 2007. Contact: National Cardiovascular Center, Jl. Let Jend S Parman Kav, 87 Slipi, Jakarta 11420, Indonesia, e-mail: [email protected] . Sixty-First Postgraduate Assembly in Anesthesiology, New York State Society of Anesthesiology. New York, NY. December 7-11, 2007. Contact: NYSSA, 85 Fifth Ave, New York, NY 10003, www.nyssa-pga.org. Twenty-Sixth Annual Symposium, Clinical Update in Anesthesiology, Surgery and Perioperative Medicine. Acapulco, Mexico. January 19-26, 2008. Contact: H. Phillips, Mt Sinai Medical Center, 1 Gustave L Levy Place, Box 1010, New York, NY 10029-6574, e-mail: [email protected] . Forty-Fourth Annual Meeting Society of Thoracic Surgeons. Fort Lauderdale, FL. January 28-30, 2008. Contact: STS 633 N Saint Clair Street, Suite 2320, Chicago, IL 60611, www.sts.org. Third French-American Meeting on Locoregional Anesthesia, Live Videotransmission of Ultrasound-Guided Blocks. Workshops on Phantom and Models. Paris, France. February 2, 2008. Contact: Michel Abiad, MD, The American Hospital of Paris, 63 Boulevard Victor Hugo, 92000 Neuilly sur Seine, France, e-mail: [email protected] . Fourteenth World Congress of Anesthesia. Cape Town, South Africa. March 2-7, 2008. Contact: www.wca2008.com. Thirteenth Annual Update on Cardiopulmonary Bypass. Whistler, British Columbia, Canada. March 9-15, 2008. Contact: SCA, PO Box 11086, 2209 Dickens Road, Richmond, VA 23230-1086, www.scahq.org. Twenty-Eighth International Symposium on Intensive Care and Emergency Medicine. Brussels, Belgium. March 18-21, 2008. Contact: Erasme University Hospital, Route de Lennik, 808, B-1070, Brussels, Belgium, e-mail: [email protected] . IARS Eighty-Second Clinical & Scientific Congress. San Francisco, CA. March 28-April 1, 2008. Contact: IARS, 2 Summit Park Drive, Suite 140, Cleveland, OH 44131, e-mail: [email protected] . Sixty-Fourth Annual Meeting Canadian Anesthesiologists Society. Halifax, Canada. May 15-16, 2008. Contact: CAS, One Eglinton Avenue East, Toronto, ON M4P3A1, Canada. Association of University Anesthesiologists Fifty-Fifth Annual Meeting. Durham, NC. May 16-18, 2008. Contact: AUA, 520 N. Northwest Highway, Park Ridge, IL 60068, www.auahq.org. Fourth International Conference on Pediatric Mechanical Circulatory Support, Pediatric Heart Transplantation and Pediatric Cardiopulmonary Perfusion. Portland, OR. May 22-24, 2008. Contact: Penn State College of Medicine, CME Dept., Box 851, Hershey, PA 17033, www.hmc.psu.edu/ce/pediatrics. Thirtieth International Congress of the International Society of Blood Transfusion. Macao, China. June 7-12, 2008. Contact: Eurocongress Conference Management, Jan van Goyenkade 11, 1075 HP Amsterdam, The Netherlands, e-mail: [email protected] . Thirtieth Annual Meeting and Workshop, Society of Cardiovascular Anesthesiologists. Vancouver, British Columbia, Canada. June 18-22, 2008. Contact: SCA, PO Box 11086, 2209 Dickens Road, Richmond, VA 23230-1086, www.scahq.org. Twenty-Second Annual Meeting Society for Pediatric Anesthesiology. Orlando, FL. October 7-9, 2008. Contact: SPA, 2209 Dickens Road, Richmond, VA 23230-2005, www.pedanesthesia.org. ASA Annual Meeting. New Orleans, LA. October 17-21, 2008. Contact: ASA, 520 N Northwest Highway, Park Ridge, IL 60068, www.asahq.org. Sixty-Second Postgraduate Assembly in Anesthesiology, New York State Society of Anesthesiology. New York, NY. December 12-16, 2008. Contact: NYSSA, 85 Fifth Ave, New York, NY 10003, www.nyssa-pga.org. Forty-Fifth Annual Meeting Society of Thoracic Surgeons. San Francisco, CA. January 26-28, 2009. Contact: STS 633 N Saint Clair Street, Suite 2320, Chicago, IL 60611, www.sts.org. Fourteenth Annual Update on Cardiopulmonary Bypass. Whistler, British Columbia, Canada. March 15-19, 2009. Contact: SCA, PO Box 11086, 2209 Dickens Road, Richmond, VA 23230-1086, www.scahq.org. Thirty-First Annual Meeting and Workshop, Society of Cardiovascular Anesthesia. San Antonio, TX. April 18-22, 2009. Contact: SCA, PO Box 11086, 2209 Dickens Road, Richmond, VA 23230-1086, www.scahq.org. Fourteenth Annual Meeting of Japanese Society of Cardiovascular Anesthesiologists and Eighth Meeting of the Asian Society of Cardiothoracic Anesthesia. Tokyo, Japan. September 10-12, 2009. Contact: Minoru Nomura, MD, Department of Anesthesiology, Women’s Medical University, 8-1 Kawada-Cho, Shinjuku-ku, Tokyo 162 86666, Japan, e-mail: [email protected] . The journal of cardiothoracic and vascular anesthesia welcomes announcements of interest to physicians, researchers and others concerned with cardiothoracic and vascular anesthesiology, medicine, pharmacology, and related areas. All copies are reviewed and edited for style, clarity, and length. Information is due at least 90 days before the date of publication and should be addressed to George Silvay, MD, PhD, Editor, Department of Anesthesiology, Mount Sinai Medical Center, 1 Gustave L. Levy Place, Box 1010, New York, NY 10029-6574.

1-9 携帯電話向けリアルタイム遠隔映像伝送装置の開発(第1部門 マルチメディア通信)

1-9 携帯電話向けリアルタイム遠隔映像伝送装置の開発(第1部門 マルチメディア通信)

Telemedical Services for Disaster Emergencies

The DELTASS (Disaster Emergency Logistic Telemedicine Advanced Satellites project aims at providing logistic and telemedical services for disaster emergencies. 1 Satellite-based systems are well-suited for these scenarios where typically the ground infrastructure has been destroyed. OP 2000 has designed and validated various satellite-based telemedical services for the support of the medical staff of a mobile field hospital (MFH), within the disaster area, by medical experts from a designated Reference Hospital (RH), outside of the disaster area. The MFH provides all activities related to coordination of the mobile teams at the disaster site, the victim's medical triage, reception, first aid, conditioning for transportation, further medical expertise by teleconsultations between the MFH and the RH. The RH acts as an expert center by providing telemedical services to the MFH. These services consist of off-line and on-line telediagnosis, access to external medical databases, as well as real-time interactive telemedical services such as live teleconsultations, live telesonography, intra-operative virtual reality simulations, and interactive telemicrobiology. One of the objectives of providing live second opinion by remote experts is to reduce the number of unneeded amputations, ma- nipulations and subsequent complications substantially by expert support during triage, diagnosis and medical treatment. These interactive telemedical services be- tween the MFH and the RH use the dedicated workstation WoTeSa (Workstation for Telemedical Applications via Satellite) with the high-end interactive commu- nication software WinVicos (Wavelet-based Interactive Video Communication System) and combine high quality live video transmission at a satellite bandwidth of up to 2 Mbit/s with remote control of medical equipment.

Eleview: Remote Intelligent Elevator Monitoring System

Elevators often become target areas for criminal activities such as robberies, fighting, and vandalism. Traditional security monitoring systems are expensive and ineffective. This article proposes a remote intelligent elevator monitoring system known as Eleview. Apart from supporting live or stored video transmission over the Internet, it also provides intelligent monitoring and web-based monitoring. Intelligent monitoring analyzes human movements in the elevator to detect abnormal or criminal activities. As the transmission of live video data through the Internet environment can result in packet loss and quality degradation, the Eleview system implements an adaptive transmission and recovery mechanism to enhance the quality of real-time video transmission. This article discusses the design and implementation of the Eleview system.

ISDN(384kbps)によるドイツ-日本間多地点手術中継実験 : 共同利用型遠隔医療教育の実用化を目指して

ISDN(384kbps)によるドイツ-日本間多地点手術中継実験 : 共同利用型遠隔医療教育の実用化を目指して

Remote Video Monitoring Over the WWW

Remote video monitoring has become increasingly important for monitoring the security of destined locations. Traditional security monitoring systems using coaxial cables and VCR recording systems are expensive and ineffective. With the rapid growth of the Internet, it is now possible to use it as an intermediate transmission medium to support real-time video transmission. This paper proposes a web-based remote monitoring system known as iSecure. Apart from the essential live or stored video transmission, intelligent monitoring and web-based monitoring are also supported. As the transmission of live video data through the packet switched network environment of the Internet can result in packet loss and quality degradation, the iSecure system has implemented an adaptive transmission and recovery mechanism to enhance the quality of real-time video transmission. Intelligent monitoring for elevator security and face-based door access control applications has been incorporated. The iSecure system can be used as a framework for developing other intelligent remote monitoring applications.

A Priority Discrete Queueing Model for Multimedia Multiplexers

Multiplexers have been extensively modeled as discrete time queueing systems. In this article, we model a multimedia multiplexer handling traffic of two classes. One class represents real-time traffic, e.g., packets of live audio or video transmissions, and the other nonreal-time traffic, e.g., packets of file transfer transmissions. These packets arrive into the multiplexer in batches. In each time slot, one batch of each class arrive. The multiplexer gives service priority to class-1 packets over class-2. The demands of each class are in conflict with that of the other, and thus they are treated by the multiplexer differently. The multiplexer is thus modeled as a (preemptive) priority discrete queueing system with simultaneous batch arrivals and geometric service time. The system occupancy is analyzed and the joint probability generating function (PGF) of the number of packets of each class is derived. From this PGF, marginal PGFs of interest are obtained. The results for deterministic service time, most suitable for ATM purposes, are readily obtainable as a special case from the results of this article.

Telecommunications at the Nagano 1998 Winter Olympic Games

The Olympic Games pose a big challenge for all telecommunications services, including voice communications, live video transmission, data transmission, and cellular phone services. Even though it is only a 16-day program, the Olympics require a large-capacity network and special grade quality and reliability over a wide geographical area (including ski resorts in the mountains). This article presents an overview of the telecommunications systems used in the Nagano 1998 Winter Olympic Games and reviews their performance.

5-7 ATM方式を用いた映像伝送実験

5-7 ATM方式を用いた映像伝送実験

Technical evaluation of a low-bandwidth, Internet-based system for teleconsultations.

A low-bandwidth telemedicine system was evaluated in eight community hospitals connected to a central hospital via the Internet. PCs were used with videoconferencing software and modem connections to the telephone network. The average data connection rates, still-image transfer times and live-video transmission rates were determined. The time to send 640 x 480, 320 x 240 and 160 x 120 pixel, 24-bit still images ranged from 29 s to 411 s. The average file transfer times for a 10 s MPEG video-clip was 8.6 min. The average live video frame rate was 1 frame/s (at the best image quality), with an average latency of 3 s. The results suggest that Internet-based videoconferencing is acceptable for certain telemedicine applications.

User interface for video observation over the internet

This paper presents the design and application of a system for live video transmission and remote camera control over the World Wide Web. Extensive testing of the Internet Video Server (IVS) prompted us to improve its user interface. The GlobalView extension of IVS was developed which enables the generation of panoramic images of the environment and a more intuitive control of the camera. The live video frame is superimposed on a 360°static panoramic picture. By interactively moving a rectangular frame in the panoramic picture, the user locally selects the new direction of the camera. Once the view is selected the users prompts the selection and the command is issued over the Internet to the remotely-controlled camera. The static panoramic image is constantly updated in areas where new live video information gets available. Two methods are described for static panoramic image generation: one uses geometric transformation and the other is the brute-force scanning approach. We discuss how visual summaries of activities on an observed location can be generated and custom queries made with a similar intuitive user interface.

Multimedia Resources: An Information Model and ItsApplication to an MPEG2 Video Codec

Still today, diagnosing a problem with multimedia resources, such as video and sound cards, is insufficiently automated. These resources therefore cannot be accurately managed. One reason for this is the lack of their thorough modeling. In this paper, we fulfill this need, by proposing a generic information model, which we further apply to an MPEG2 video codec. We highlight the main characteristics of this kind of codec, identify parameters that influence these characteristics, and reveal some of the trade-offs that the application developer can consider in order to design efficient software for MPEG2 codecs. In addition to the benefits of this modeling for the user and the application developer, we also show how useful it could be for the providers of distribution services, such as live video transmission. These providers can use our model to achieve resource management on an end-to-end basis.

Patient Evaluation Through Live Video Transmission

Back to table of contents Previous article ArticleNo AccessPatient Evaluation Through Live Video TransmissionCARL SALZMAN, DONNA ORVIN, ANNETTE HANSON, and ANTHONY KALINOWSKICARL SALZMANSearch for more papers by this author, DONNA ORVINSearch for more papers by this author, ANNETTE HANSONSearch for more papers by this author, and ANTHONY KALINOWSKISearch for more papers by this authorPublished Online:1 Apr 2006https://doi.org/10.1176/ajp.153.7.968-aAboutSectionsPDF/EPUB ToolsAdd to favoritesDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InEmail "Patient Evaluation Through Live Video Transmission." American Journal of Psychiatry, 153(7), pp. 968-a–968 Access content To read the fulltext, please use one of the options below to sign in or purchase access. Personal login Institutional Login Sign in via OpenAthens Purchase Save for later Item saved, go to cart PPV Articles - American Journal of Psychiatry $35.00 Add to cart PPV Articles - American Journal of Psychiatry Checkout Please login/register if you wish to pair your device and check access availability. Not a subscriber? Subscribe Now / Learn More PsychiatryOnline subscription options offer access to the DSM-5 library, books, journals, CME, and patient resources. This all-in-one virtual library provides psychiatrists and mental health professionals with key resources for diagnosis, treatment, research, and professional development. Need more help? PsychiatryOnline Customer Service may be reached by emailing [email protected] or by calling 800-368-5777 (in the U.S.) or 703-907-7322 (outside the U.S.). FiguresReferencesCited byDetailsCited byCan telepsychiatry bridge the treatment gap?Journal of Mental Health and Human Behaviour, Vol. 27, No. 2Use of Video Conferencing for Psychiatric and Forensic EvaluationsFrances J. Lexcen, Ph.D.Gary L. Hawk, Ph.D.Steve Herrick, Ph.D.Michael B. Blank, Ph.D.1 May 2006 | Psychiatric Services, Vol. 57, No. 5 Volume 153Issue 7 July 1996Pages 968-a-968 Metrics PDF download History Published online 1 April 2006 Published in print 1 July 1996