Error Resilient Speech Coding Using Sub-band Hilbert Envelopes
Frequency Domain Linear Prediction (FDLP) represents a technique for auto-regressive modelling of Hilbert envelopes of a signal. In this paper, we propose a speech coding technique that uses FDLP in Quadrature Mirror Filter (QMF) sub-bands of short segments of the speech signal (25 ms). Line Spectral Frequency parameters related to au-toregressive models and the spectral components of the residual signals are transmitted. For simulating the effects of lossy transmission channels, bit-packets are dropped randomly. In the objective and subjective quality evaluations, the proposed FDLP speech codec is judged to be more resilient to bit-packet losses compared to the state-of-the-art Adaptive Multi-Rate Wide-Band (AMR-WB) codec at 12 kbps.
- URL: http://publications.idiap.ch/downloads/papers/2009/Ganapathy_TSD2009-2_2009.pdf
- Related documents: http://publications.idiap.ch/index.php/publications/showcite/Ganapathy_TSD2009_2009
Record created on 2010-02-11, modified on 2016-08-08