Patent · US Expired

Method of transmitting an audio signal

US4942607A · kind A · utility

23Cited by

5References

24Claims

0Family size

Assignee

Deutsche Thomson-Brandt GmbH · DE

Inventors

Ernst Schroder · Hannover, DE
Walter Voessing · Hannover, DE

Key dates

Filing date	Feb 3, 1988
Grant date	Jul 17, 1990
Priority date	—
Expiry date	Feb 3, 2008

Classification

Technology area (CPC H)Electricity
CPC primaryH04B1/665
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A method of digital transmission of an audio signal, in which in order to save transmission and/or memory capacity, the digital signal is converted, before transmission, into signals representing the short-term spectrum of time sections of the digital signal and portions of this signal are processed on the basis of psycho-acoustic laws, with portions of this signal lying below given thresholds left unconsidered, with at least one first threshold being defined below which only amplitude values outside of psycho-acoustically differentiable frequency ranges are left unconsidered.

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