Patent · US Active

Audio level meter

US8295958B2 · kind B2 · utility

0Cited by

4References

5Claims

0Family size

Assignee

Thomson Licensing · FR

Inventors

Markus Schlosser · Ellwangen, DE
Ulrich Schreiber · Miltach, DE
Mario Sieck · Hankensbüttel, DE

Key dates

Filing date	Aug 7, 2007
Grant date	Oct 23, 2012
Priority date	—
Expiry date	Feb 26, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH04S7/40
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A circuit for correcting the output of an audio level meter comprises input means for generating the square or the absolute value of an input signal, a low pass filter having a predetermined attack time and release time, and output means for converting the output signal from a linear scale to a logarithmic scale. The circuit further comprises a correction means to which an information about whether the input signal to the audio level meter was subject to squaring or converting into an absolute value at the input, as well as the attack and release time of the low pass filter, are supplied as input values, and which provides, at its output, a value representing the difference between the output of the audio level meter and the true signal power of the input signal.

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