Paper Info
Title
Low complexity forward error correction for CELP-type speech coding over erasure channel transmission.
Abstract
One of the well-known problems of Code-Excited Linear Prediction (CELP)-type codec is its vulnerability to a frame erasure. When a frame is erased, the inter-frame dependency introduced by the Long Term Prediction causes a desynchronization of the Adaptive Codebook (ACB) which introduces in its turn an error propagation through the correctly received frames. In this paper, we propose a media-specific Forward Error Correction (FEC) method using a Pitch-Pulse Codebook (PPCB)-based approach to model the ACB contribution for voiced frame (frame onset) determined under Zero Crossing Rate constraint. The PPCB uses a single pulse optimized by Multipulse Maximum Likelihood Quantization algorithm to model the pitch-like contribution at the encoder side while the quantized version of that pulse will be sent as FEC information to resynchronize the ACB at the decoder side after a frame erasure. Through this approach a noticeable improvement of the synthesis speech quality is achieved under adverse channel conditions with the advantage of low computational complexity while the legacy bit-rate of the codec is kept unchanged.
Year
DOI
Venue
2016
10.1007/s10772-016-9365-1
International Journal of Speech Technology
Keywords
Field
DocType
VoIP, Pitch pulse, Forward error correction, Error propagation, ACB resynchronization
Forward error correction,Code-excited linear prediction,Speech coding,Computer science,Binary erasure channel,Speech recognition,Quantization (signal processing),Codec,Codebook,Erasure
Journal
Volume
Issue
ISSN
19
4
1572-8110
Citations 
PageRank 
References 
0
0.34
16
Authors
4
Name
Order
Citations
PageRank
Benamirouche, N.101.01
bachir boudraa2124.79
Domingo López-Oller342.10
José L. Pérez-Córdoba417515.79