Voice signal coding method

Details Voice signal coding method Voice signal coding method

1987-10-22

1989-09-26

Wong, Peter S.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

3645135, 341143, 375122, G10L 302

Patent

active

048706850

ABSTRACT:
A voice signal coding method for compressing voice data by coding is provided. PCM coded voice data are grouped into blocks in a timed sequence, each block having a predetermined number of data. A scale data representing a MSB corresponding to a maximum value in absolute value in each block is identified. Then, a code data is defined by a predetermined number of bits of data containing the MSB, thereby having the voice data compressed by coding. The code data is corrected such that an error between a decoded value of the code data and the original voice data corresponding to the code data is minimized. With such a correction step, the code data is refined such that a reproduced voice signal by decoding the thus corrected code data is very close to the original voice signal.

REFERENCES:
patent: 4301333 (1981-11-01), Gillette
patent: 4481659 (1984-11-01), Adoul
patent: 4550425 (1985-10-01), Anderson et al.
patent: 4587669 (1986-05-01), Gillette
patent: 4588986 (1986-05-01), Byrne
patent: 4700360 (1987-10-01), Visser

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