Mixed Fourier/Walsh transform scheme for speech coding at 4.0 kbit/s
- 1 January 1992
- journal article
- Published by Institution of Engineering and Technology (IET) in IEE Proceedings I Communications, Speech and Vision
- Vol. 139 (5), 473-481
- https://doi.org/10.1049/ip-i-2.1992.0063
Abstract
A mixed Fourier/Walsh transform scheme for speech coding is proposed. A set of harmonically structured frequency components is used to represent narrow-band components of speech. The broadband residual is characterised by a small number of sequency components. The frequencies and sequencies of the transform components are determined by sampling the shorttime Fourier and Walsh transforms, respectively. The magnitudes and phases of the Fourier components and the amplitudes of the Walsh components are determined using an iterative algorithm based on the Gauss-Seidel method. A vector quantisation (VQ) scheme is developed to encode the frequency and the sequency components. Results and subjective evaluations are given for speech coding at 4.0 kbit/sKeywords
This publication has 8 references indexed in Scilit:
- Enhancement of speech corrupted by acoustic noisePublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Code-excited linear prediction(CELP): High-quality speech at very low bit ratesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- An elevation of 4800 bps voice codersPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Harmonic coding at 4.8 kb/sPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Vector sum excited linear prediction (VSELP) speech coding at 8 kbpsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Advances in Speech CodingPublished by Springer Nature ,1991
- Linear Prediction of SpeechCommunication and Cybernetics, 1976
- Orthogonal Transforms for Digital Signal ProcessingPublished by Springer Nature ,1975