Multi-state speech encoder and decoder

Details Multi-state speech encoder and decoder Multi-state speech encoder and decoder

1984-03-12

1987-11-03

Kemeny, E. S. Matt

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

3645135, G10L 500

Patent

active

047047305

ABSTRACT:
Audio signals are analyzed for predictable components (reflection coefficients) and non-predictable (residual) components. The original signal state, over a short-term interval of samples (packet) is defined as one of four states: Silence, Hiss, Sigma, or Peaky. The state determines the step-size encoding of the residual quantized signal, which can therefor be encoded more efficiently.

REFERENCES:
patent: 3890467 (1975-06-01), Sciulli
patent: 4220819 (1980-09-01), Atal
patent: 4301329 (1981-11-01), Taguchi
patent: 4335275 (1982-06-01), Brantingham
patent: 4354057 (1982-10-01), Atal
patent: 4536886 (1985-08-01), Papamichalis et al.
patent: 4594687 (1986-06-01), Kaneko et al.
Atal, "Predictive Coding of Speech etc.," IEEE Trans. on Comm., vol. Comm-30, No. 4, pp. 600-614, Apr. 1982.

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