Title :
A tone oriented voice excited vocoder
Author_Institution :
Chalmers University of Technology, Gothenburg, Sweden
Abstract :
An LPC base-band vocoder is developed. The novel feature concerns the coding of the base-band. A model is set up for the base-band as a set of modulated tones. Algorithms are presented for the extraction of amplitude and phase/frequency of the tones. Implementation aspects as well as simulation results are discussed. Total bit rates in the order of 3,2-4.8 kbits are possible where approximately one half of the bits represents the base-band coding. Experiments have shown the coder to be robust to background noise.
Keywords :
Bit rate; Detectors; Estimation theory; Frequency; Linear predictive coding; Parametric statistics; Quantization; Robustness; Speech; Vocoders;
Conference_Titel :
Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '81.
DOI :
10.1109/ICASSP.1981.1171294
