Voice over wireless LAN: a fine-scalable channel-adaptive speech coding scheme

ABSTRACT

Achieving a fine-scalable and channel-adaptive speech coding scheme to provide reliable voice communication in wireless IP networks is an important challenge that opens new directions for research. In this proposal we review the problems and issues in supporting voice over wireless networks and examine the role of new speech coding techniques and the proper use of existing network protocols aimed at providing adequate quality of service in this difficult environment. We propose a new coding scheme, that fulfills the requirements of robust and reliable VoWLAN expectantly.

REFERENCES

• 1: 3GPP2. VMR-WB specification published by 3GPP2 and TIA as C.S0052-0 v1.0 and TIA-1016, 2004.
• 2: C. Cordeiro, H. Gossain, R. L. Ashok, and D. P. Agrawal. The last mile: Wireless technologies for broadband and home networks. 21th Brazilian Symposium on Computer Networks in Natal, 2003.
• 3: ETSI. Narrowband coding of speech at around 16 kbps using Adaptive Multi-Rate Narrowband (AMR-NB), 1998.
• 4: N. Franchi, M. Fumagalli, R. Lancini, and S. Tubaro. Multiple description video coding for scalable and robust transmission over IP. IEEE Transactions on Circuits and Systems for Video Technology, 15(3):321--334, March 2005.
• 5: V. K. Goyal. Multiple description coding: Compression meets the network. IEEE Signal Processing Magazine, pages 74--93, September 2001.
• 6: B. M. Hochwald and P. R. Jelenkovic. State learning and mixing in entropy of hidden Markov processes and the Gilbert-Elliott channel. IEEE Transactions on Information Theory, 45(1):128--138, 1999.
• 7: ITU-T. Recommendation G.729a - Coding of Speech at 8 kbit/s using Conjugate-Structure Algebraic-Code-Excited Linear-Prediction (SC-ACELP), 1996.
• 8: ITU-T. Recommendation G.711 - Pulse Code modulation (PCM) of voice frequencies, 1998.
• 9: ITU-T. Recommendation G.722.2 - Wideband coding of speech at around 16 kbps using Adaptive Multi-Rate Wideband (AMR-WB), 2002.
• 10: Andreas Köpsel , Adam Wolisz, Voice transmission in an IEEE 802.11 WLAN based access network, Proceedings of the 4th ACM international workshop on Wireless mobile multimedia, July 21-21, 2001, Rome, Italy [doi>10.1145/605991.605995]
• 11: Ki-Dong Lee , Sehun Kim, Optimization for adaptive bandwidth reservation in wireless multimedia networks, Computer Networks: The International Journal of Computer and Telecommunications Networking, v.38 n.5, p.631-643, 5 April 2002 [doi>10.1016/S1389-1286(01)00276-6]
• 12: G. Nair, J. Chou, T. Madejski, K. Perycz, D. Putzolu, and J. Sydir. IEEE 802.16 medium access control and service provisioning. Intel Technology Journal, 8(4):213--228, 2004.
• 13: R. Venkataramani, G. Kramer, and V. K. Goyal. Multiple description coding with many channels. IEEE Trans. Inform. Theory, 49(9):2106--2114, September 2003.

INDEX TERMS

Primary Classification:
  E. Data
  E.4 CODING AND INFORMATION THEORY
      Subjects: Data compaction and compression

Additional Classification:
  E. Data
  E.4 CODING AND INFORMATION THEORY

General Terms:
Algorithms, Measurement, Reliability

Keywords:
VoWLAN, WiMAX, multiple description coding, speech coding, wavelet layered coding, wi-fi