Abstract
In this paper, a hybrid transform method for analysis/synthesis and coding of speech signals is proposed. A finite number of Fourier functions is used to represent frame-by-frame the selective (narrow-band) components of speech. The broadband residual is characterized by a small number of Walsh functions. An iterative algorithm, to determine the frequency and sequency components in a systematic manner, is derived. This is employed for speech coding at 16 kbit/s and 9.6 kbit/s. The hybrid transform method produces natural sounding speech which is indistinguishable from the original at 16 kbit/s and highly intelligible at 9.6 kbit/s.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 217-229 |
| Number of pages | 13 |
| Journal | Signal Processing |
| Volume | 24 |
| Issue number | 2 |
| DOIs | |
| State | Published - Aug 1991 |
Keywords
- Fourier
- Speech
- Walsh
- coding
- transforms
ASJC Scopus subject areas
- Control and Systems Engineering
- Software
- Signal Processing
- Computer Vision and Pattern Recognition
- Electrical and Electronic Engineering