Model-based packet loss concealment for AMR coders

A general packet loss correction/concealment signal recovery framework is proposed for parametric speech coders. Both redundancy-based forward error correction (FEC) and receiver only (RO) techniques are considered in conjunction with the adaptive multi-rate (AMR) coder. The robust, low bit rate, hi...

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Main Authors: Xydeas, C.S., Zafeiropoulos, F.
Format: Conference Proceeding
Language:English
Subjects:
Adaptive filters
Bit rate
Forward error correction
Information filtering
Information filters
Knowledge based systems
Linear predictive coding
Propagation losses
Robustness
Speech coding
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Zafeiropoulos, F.
description A general packet loss correction/concealment signal recovery framework is proposed for parametric speech coders. Both redundancy-based forward error correction (FEC) and receiver only (RO) techniques are considered in conjunction with the adaptive multi-rate (AMR) coder. The robust, low bit rate, high communications speech quality Manchester pitch synchronous (MPS) coder is employed in the proposed systems as a secondary coding process. Thus the performance of AMR/MPS-FEC/RO packetised speech transmission systems is considered. Subjective and objective computer simulation results clearly indicate the superiority of the proposed schemes over conventional AMR based systems, particularly at relatively high (>5%) packet loss rates.
doi_str_mv 10.1109/ICASSP.2003.1198729
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source IEEE Xplore All Conference Series
subjects Adaptive filters
Bit rate
Forward error correction
Information filtering
Information filters
Knowledge based systems
Linear predictive coding
Propagation losses
Robustness
Speech coding
title Model-based packet loss concealment for AMR coders
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