روش جدیدی در بسته‌بندی نمونه‌های صوتی جهت مقابله با مشکل گم‌شدن بسته‌ها
محورهای موضوعی : مهندسی برق و کامپیوتر
یوسف درمانی
1
(دانشگاه صنعتی خواجه نصيرالدين طوسی)
کلید واژه: انتقال صدا روی اینترنتبازسازی بسته‌های گم‌شدهشبکه فعال,
چکیده مقاله :
این مقاله به معرفی روشی برای بسته‌بندی صدا جهت انتقال روی شبکه اینترنت می‌پردازد. هدف از این روش آن است که تا حد ممکن از کاهش کیفیت صدا به‌دلیل گم‌شدن بسته‌های صوتی در شبکه جلوگیری شود. این روش اجازه بازسازی بسته‌های گم‌شده را در حین عبور از شبکه در گره‌های فعال شبکه می‌دهد، لذا کیفیت صدای دریافتی در گیرنده بالاتر از روش‌های عادی انتقال صدا روی اینترنت خواهد بود. کارآیی این روش به‌وسیله شبیه‌سازی یک شبکه انتقال داده کاملاً غیر امن به‌همراه یک گره فعال بررسی شده و نشان داده شده که کیفیت صدای دریافتی حتی با 50% بسته‌های گم‌شده نیز بسیار بهتر از روش‌های دیگر انتقال صدا می‌باشد.
This article introduces a new voice packing scheme to transfer voice samples over the Internet. This method aims to reduce the voice quality degradation caused by lost packets as far as possible. Regenerating lost voice packets in active nodes in the network, introduces more received voice quality at the receiver side compared with the other methods. This scheme is simulated using an unreliable network with an active node, and it shows more voice quality than the other schemes even if the network loses 50 percent of packets.
[1]S. Bush and K. Kulkarni, Active Network and Active Network Management, Kluwer Academic/Plenum Publishers, New York, 2001.
[2]A. Eddaoui and A. Mezrioui, "An active network approach for security management," Int. J. of Computer Science and Network Security, vol. 6, no. 5b, pp. 203-210, May 2006.
[3]Y. Darmani, L. White, and M. Liebelt, "New methods for lost voice packet recovery in active networks," in Proc.IEEE Int. Conf. on Networks, ICON2003, pp. 57-62, Sydney, Australia, Oct. 2003.
[4]H. Sanneck, Packet Loss Recovery and Control for Voice Transmission over the Internet, Ph.D. Thesis, Department of Electrical Engineering, Technical University of Berlin, Berlin, Germany, 2000, http://sanneck.net/research/publications/ thesis/Sann0010_Loss.pdf (access: May 2007).
[5]Y. Darmani, L. White, and M. Liebelt, "A new voice packing scheme to recover the lost packets using active networks," in Proc. Int. Symp. on Telecommunication, IST2003, pp. 95-99, Isfahan, Iran, Oct. 2003.
[6]Q. Gao, Real-Time Transmission over Internet, M.Sc. Thesis, Institutionen for Systemteknik, Linkopings Universitet, Linkopings, Sweden, Feb. 2004.
[7]S. Servetto, et al., "Video multicast in(large) local area networks," in Proc. of IEEE INFOCOM, vol. 2, pp. 733-742, New York, NY, Jun.2002.
[8]J. Bolot, H. Crepin, and A. Vega-Garcia, "Analysis of audio packet loss in the internet," in Proc. 5th In. Workshop, Network and Operating System Support for Digital Audio and Video, NOSSDAV, pp. 163-174, Apr. 1995.
[9]B. Wah, D. Lin, and X. Su, "Streaming real-time audio and video data with transformation-based error concealment and reconstruction," in Proc. of the 1st Int. Conf. on Web Information Systems Engineering, WISE 2000, IEEE Computer Society , vol. 1, pp. 2-13, Hong Kong, China, Jun. 2000.
[10]M. Yajnik, S. Moon, J. Kurose, and D. Towsley, "Measurement and modelling of the temporal dependence in packet loss," in Proc. of IEEE Infocom’99, pp. 345-352, New York, US, Mar. 1999.
[11]W. Jiang and H. Schulzrinne, "Modeling of packet loss and delay and their effect on real-time multimedia service quality," in Proc. 10th Int Workshop on Network and Operating System Support for Digital Audio and Video, Chapel Hill, NC, US, 26-28 Jun. 2000.
[12]W. Liao, J. Chen, and M. Chen, "Adaptive recovery techniques for real-time audio streams," in Proc. IEEE INFOCOM 2001 , vol. 2, pp. 815-823, Apr. 2001.
[13]D. Wetherall, U. Legedza, and J. Guttag, "Introducing new internet service: why and how," IEEE Network, vol. 12, no. 3, pp. 12-19, Jul./Aug. 1998.
[14]M. Sarwar Ehsan and G. Kubin, "Comparison between silence substitution and packet repetition for real-time speech communication," in Proc. Int. Conf. on Measurement of Speech and Audio Quality in Networks, MESAQIN, Prague,Czech Republic, Jun. 2005.
[15]B. Gold and C. Rader, Digital Processing of Signals, Robert Krieger Publishing Company, Malabar, Florida, ch. 6., 1983.
[16]S. Bajaj, et al., Virtual Internetwork Testbed: Status and Research Agenda, Tech. Report, University of Southern California, 98-678, Jul. 1998.