Multi-pulse type encoder having a low transmission rate

Details Multi-pulse type encoder having a low transmission rate Multi-pulse type encoder having a low transmission rate

1988-02-04

1990-02-20

Kemeny, Emanuel S.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 49, G10L 500

Patent

active

049033034

ABSTRACT:
In an encoder for encoding a speech signal having a spectrum envelope into a plurality of excitation pulses, a spectrum emphasis unit emphasizes peak components of the spectrum envelope to produce an emphasized speech signal. As a result of a spectrum emphasis operation, the emphasized speech signal has an emphasized spectrum envelope which substantially comprises a plurality of line spectra. Responsive to the emphasized speech signal, a pulse producing unit produces a plurality of excitation pulses by the use of a pulse search method.

REFERENCES:
patent: 4701954 (1987-10-01), Atal
patent: 4720865 (1988-01-01), Taguchi
patent: 4731846 (1988-03-01), Secrest
patent: 4776015 (1988-10-01), Takeda et al.

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