Robust voice recognition over IP and mobile networks

Milner, Ben (2000) Robust voice recognition over IP and mobile networks. In: 11th IEEE Symposium on Personal Indoor Mobile Radio Communication (PIMRC), 2000-09-18 - 2000-09-21.

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This work looks at the issues involved in performing robust speech recognition over mobile and IP networks. The conventional method for sending speech across a mobile or IP network is to encode the speech on the terminal device using a low bit-rate codec and then transmit the stream of codec parameters. It is shown in this work that for speech recognition applications an alternative is available whereby the front-end processing part of a network-based speech recogniser is detached and moved onto the terminal device. Recognition features are then sent over the network to the remote recogniser. Simulations demonstrate that sending the speech features in this manner can provide a significant enhancement in recognition performance over the traditional codec-based approach. This technique forms the basis of the ETSI (European Telecommunications Standards Institute) Aurora standard. Problems arising with access over IP networks are also considered and in particular that of packet loss. A novel two-stage identification and estimation strategy is introduced which compensates for this loss of speech packets. Simulation results show that an almost negligible loss in recognition performance is possible at packet losses of up to 50%

Item Type: Conference or Workshop Item (Paper)
Faculty \ School: Faculty of Science > School of Computing Sciences
UEA Research Groups: Faculty of Science > Research Groups > Interactive Graphics and Audio
Faculty of Science > Research Groups > Smart Emerging Technologies
Depositing User: Vishal Gautam
Date Deposited: 21 Jun 2011 18:06
Last Modified: 09 Jan 2024 01:16
DOI: 10.1109/PIMRC.2000.881609

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