Fourth European Conference on Speech Communication and Technology

Madrid, Spain
September 18-21, 1995

A Robust 2.4kb/s LP-MBE With Iterative LP Modelling

Clifford I. Parris (1), Danny Wong (1), Francois Chambon (2)

(1) Ensigma Ltd., Chepstow, UK
(2) ENST, Paris, France

In order to reduce the transmission bandwidth requirement for the spectral envelope parameters for Multiband Excitation (MBE) coders [1] Linear Prediction (LP) modelling has been widely investigated [2, 3, 4]. In this paper we compare the direct methods for evaluating the linear prediction filter [2, 3] with a novel iterative LP modelling technique. A novel switched Vector Quantizer (VQ) is employed to transmit 12 binary V/UV harmonic decisions [5] using only 4 bits which achieves only 5% errors. To enhance robustness joint source and channel coding codebook design and search has been incorporated into the coder.

Full Paper

Bibliographic reference.  Parris, Clifford I. / Wong, Danny / Chambon, Francois (1995): "A robust 2.4kb/s LP-MBE with iterative LP modelling", In EUROSPEECH-1995, 677-680.