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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Bibliographic Details
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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Summary: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.
ISSN:1520-6149
2379-190X
DOI:10.1109/ICASSP.2003.1198729