ABSTRACT
We compare different source diversity methods for converstional voice communication over multiple routes in a mobile ad-hoc network (MANET). A new multiple description (MD) codec based on the AMR-WB codec, with two balanced side descriptions (6.9 kbps each) is presented. We compare the performance of the MD codec against two other diversity methods, 1) duplicating speech encoded with AMR-WB at 6.6 kbps and 2) duplicating speech encoded with AMR-WB at 12.65 kbps. We show that because of the large packet headers added to each packet by typical MANET protocols, the overhead of sending the simple path diversity methods is not much larger than the overhead for sending MD streams over different paths, and the gain in speech quality we get from duplicating AMR-WB at 12.65 kbps over sending MD codec streams is significant. We compare the speech quality delivered by each of the methods under random and bursty packet loss conditions. The quality of decoded speech is evaluated using WPESQ, a wideband extension to the PESQ algorithm.
- H. Dong, I. Chakeres, H. Dong, E. Belding-Royer, A. Gersho, and J. Gibson, "Selective bit-error checking at the mac layer for voice over mobile ad hoc networks with ieee 802.11," in Proceedings of the IEEE Wireless Communications and Networking Conference (WCNC), Mar.2004.Google Scholar
- A. Servetti and J. D. Martin, "Link-level unequal error detection for speech transmission over 802.11 networks," in Proc. Special Workshop in Maui (SWIM), Jan.2004.Google Scholar
- —, "Error tolerant mac extension for speech communications over 802.11 wlans," in IEEE 61st Vehicular Technology Conference, 2005. VTC 2005-Spring., 30 May-1 June 2005, pp.2330--2334.Google Scholar
- Spectralink.(2006, Mar.) Spectralink voice priority. White Paper. {Online}. Available: http://www.spectralink.com/files/literature/SVP white paper.pdfGoogle Scholar
- M. Petracca, A. Servetti, and J. D. Martin, "Voice transmission over 802.11 wireless networks using analysis-by-synthesis packet classification," in First International Symposium on Control, Communications and Signal Processing, 2004.Google Scholar
- C. Hoene, I. Carreras, and A. Wolisz, "Voice over IP: Improving the quality over wireless LAN by adopting a booster mechanism - an experimental approach," in SPIE 2001 - Voice Over IP (VoIP) Technology, 2001, pp.157--168.Google Scholar
- A. Servetti and J. D. Martin, "Adaptive interactive speech transmission over 802.11 wireless LANs," in Proc. IEEE Int. Workshop on DSP in mobile and Vehicular Systems, Apr.2003.Google Scholar
- B. Bessette, R. Salami, R. Lefebvre, M. Jelinek, J. Rotola-Pukkila, J. Vainio, H. Mikkola, and K. Jarvinen, "The adaptive multirate wideband speech codec (AMR-WB)," in IEEE Trans. on Speech and Audio Processing, Nov.2002.Google Scholar
- H. Dong, A. Gersho, V. Cuperman, and J. Gibson, "A multiple description speech coder based on amr-wb for mobile ad hoc networks," in ICASSP'04, May 2004.Google Scholar
- Perceptual evaluation of speech quality (PESQ), an objective method for end-to-end speech quality assessment of narrow-band telephone networks and speech codecs, ITU-T P.862 Recommendation.Google Scholar
- Proposed modification to draft P.862 to allow PESQ to be used for quality assessment of wideband speech (BT, United Kingdom, and KPN, The Netherlands), ITU-T SG12 COM-D007-E Delayed Contribution, Feb.2001.Google Scholar
- V. Barriac, J.-Y. L. Saout, and C. Lockwood. Discussion on unified objective methodologies for the comparison of voice quality of narrowband and wideband scenarios. {Online}. Available: http://portal.etsi.org/stq/presentations2004/090-Mainz FT objective methodologies.docGoogle Scholar
Index Terms
- Multiple descriptions and path diversity using the AMR-WB speech codec for voice communication over MANETs
Recommendations
Multiple Descriptions and Path Diversity for Voice Communications Over Wireless Mesh Networks
A key feature of wireless mesh networks is that multiple independent paths through the network are available. Multiple descriptions coding is often suggested as a source coding scheme to take advantage of this path diversity. We compare multiple ...
Comparison and optimization of packet loss recovery methods based on AMR-WB for VoIP
AMR-WB codec, which has been standardized for wideband speech conversational applications, has a broad range of potential applications in the migration of wireless and wireline networks towards a single converged IP network. Forward error control (FEC) ...
The Codebook Design Based on Ant Colony Clustering Algorithm and its Application in AMR-WB
CMCSN '12: Proceedings of the 2012 International Conference on Computing, Measurement, Control and Sensor NetworkCodebook design plays a crucial role in the performance of speech signal processing systems based on vector quantization, such as speech codec, speech recognition and so on. LBG algorithm is one of the most effective methods to generate codebooks and is ...
Comments