A perceived quality of service optimization for video communication in ‘best-effort’ networks

  • Raffaele Bolla
  • Alessandro Iscra
  • Mario Marchese
  • Sandro Zappatore
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1425)


A congestion control mechanism is presented, aimed at increasing performances for multimedia traffic in “best effort” networks. A source-destination point-to-point video communication is investigated. The control algorithm dynamically varies the encoder configuration on the base of some feedback information from the destination. The selection of the proper configuration is performed by a control block called “smart coder” which, after receiving the feedback information, can change the transmission rate to optimize the level of Quality of Service (QoS) perceived by the user for a certain network status. The change of the transmission rate is performed by acting on coding parameters as the type of video coder, the spatial resolution, the frame rate and so on, formally defined in the paper. Feedback information is based on the measure of the average rate of the lost packets, but since this measure cannot give information about underload condition, a specifically designed probing mechanism, based on the introduction of a redundancy in the video flow, is used. A relevant part of the paper is dedicated to the analysis of the results: the efficiency of the control scheme is tested in a local environment based on the Ethernet protocol.


Packet Loss Traffic Load Mean Opinion Score Propose Control Scheme Call Admission Control 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. 1.
    Rabbani, Majid, Jones, W. Paul: Digital Image Compression Techniques. SPIE Optical Engineering Press, Washington, USA (1991)Google Scholar
  2. 2.
    Gecsei: Adaptation in distributed multimedia systems. IEEE Multimedia, vol. 4, no. 2 (April-June 1997) 58–66Google Scholar
  3. 3.
    J.C. Bolot, T. Turletti, l. Wakeman: Scalable feedback control for multicast video distribution in the Internet. Proc. ACM SIGCOMM'94, London, UK (1994) 58–67Google Scholar
  4. 4.
    V.Jacobson: Congestion avoidance and control. Proc. ACM SIGCOMM'88, Stanford, CA (August 1988)Google Scholar
  5. 5.
    H. Kanakia, P.P. Mishra, A. Reibman: An adaptive congestion control scheme for real-time packet video transport. Proc. ACM SIGCOMM'93 (1993) 20–30Google Scholar
  6. 6.
    R.Bolla, M.Marchese, S.Zappatore: A congestion control scheme for multimedia traffic in packet switching “best-effort” networks. Proc. Multimedia Appl., Services and Tech. (ECMAST '97), Milano, Italy (May 1997) 523–536Google Scholar
  7. 7.
    K. Jeffay, D.L. Stone, F.D. Smith: Transport and display mechanisms for multimedia conferencing across packet-switched networks. Computer Networks and ISDN Systems, vol. n. 26 (1994) 1281–1304Google Scholar
  8. 8.
    M.H. Willebeek-LeMair, Zon-Yin-Shae: Videoconferencing over packet-bases networks. IEEE JSAC, vol. 15 n. 6 (Aug. 1997) 1101–1114Google Scholar
  9. 9.
    S. Okubo, S Dunstan, et al.: ITU-T Standardization of audiovisual communication systems in ATM and LAN environments. IEEE JSAC, vol. 15, n. 6 (Aug. 1997) 965–982Google Scholar
  10. 10.
    K. Jeffay, T. Talley: Two-Dimensional Scaling Techniques for Adaptive, Rate-Based Transmission Control of Live Audio and Video Streams. Proc. of the Second ACM International Conference on Multimedia, S. Francisco, CA (Oct. 1994) 247–254Google Scholar
  11. 11.
    K. Jeffay, F. D. Smith, D. L. Stone, T. Talley: Adaptive, Best-Effort Delivery of Digital Audio and Video Across Packet-Switched Networks. Proc. Network and Operating System Support for Digital Audio and Video, V. Rangan (Ed.), Lecture Notes in Computer Science, vol. n. 712, Springer-Verlag, Heidelberg (1993)Google Scholar
  12. 12.
    H. Kanakia, P. P. Mishra, Amy R. Reibman: An Adaptive Congestion Control Scheme for Real Time Packet Video Transport. IEEE/ACM Trans. on Networking, vol. 3 n. 6 (Dec. 1995)Google Scholar
  13. 13.
    ITU-T Recommendation T.80: Telephone transmission quality subjective opinion tests (1993)Google Scholar
  14. 14.
    ITU-T Recommendation F.720: Telematic, data transmission, ISDN broadband, UTP and teleconference services: operations and quality of service (videotelephony services-general) (1992)Google Scholar
  15. 15.
    ITU-T Recommendation F.730: Telematic, data transmission, ISDN broadband, universal personal communications and teleconference services: operations and quality of service (videoconference service-general) (1992)Google Scholar
  16. 16.
    ITU-T Recommendation F.740: Operations and quality of service, audiovisual service (1993)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • Raffaele Bolla
    • 1
  • Alessandro Iscra
    • 1
  • Mario Marchese
    • 1
  • Sandro Zappatore
    • 1
  1. 1.Department of CommunicationsComputer and System Science (DIST)GenoaItaly

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