Patent · US Expired

Method of and arrangement for deriving characteristic values from a sound signal

US4379948A · kind A · utility

7Cited by

3References

2Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Hermann Ney · Hamburg, DE
Michael Harald Kuhn · Hamburg, DE

Key dates

Filing date	Sep 29, 1980
Grant date	Apr 12, 1983
Priority date	—
Expiry date	Sep 29, 2000

Classification

Technology area (CPC G)Physics
CPC primaryG10L15/00
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

In order to reduce the information contents of a sound signal, for example a speech signal, the sound signal is divided into adjacent frequency ranges and the signals then obtained are consecutively integrated over short time intervals to short-time-spectrum signals. Subsequently, a histogram of the short-time-spectrum signals is formed for each frequency range and said histograms are divided into a given number of equal-area portions. The boundaries of said portions, which are referred to as quantiles, represent the characteristic values. The amplifier noise or the noise of the complete recording arrangement as well as a difference in sound energy level during when different sound signals are processed can then be eliminated at least in respect of their effect.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.