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Method and apparatus for processing audio signals

An audio signal, audio source technology, applied in the compression/expansion of digital/encoded signal volume, compression/expansion of non-tuning/low frequency amplifier volume, speech analysis, etc., can solve the problem of reducing dynamic range, high processing and storage capacity And other issues

Active Publication Date: 2017-03-22
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these algorithms use equalizers, compressors or limiters to alter the associated sound track or they reduce the dynamic range due to this adjustment
Furthermore, this type of algorithm usually requires high processing and storage capacity

Method used

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  • Method and apparatus for processing audio signals
  • Method and apparatus for processing audio signals
  • Method and apparatus for processing audio signals

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Embodiment Construction

[0027] according to figure 1 , in the method for volume adjustment according to the invention, the input audio signal 11 is varied by multiplying by a source-dependent and time-dependent amplitude 15 to obtain an output audio signal 16 . The amplitude 15 is calculated from a constant by dividing the volume setting value (SET) 13 by the estimated average maximum psychoacoustic volume 12 from the volume memory 14 (hereinafter referred to as figure 2 explained in more detail) to get the constant. In order to avoid signal distortion due to abrupt changes in the amplitude 15, the amplitude value preferably decreases gradually over time.

[0028] In order to calculate the amplitudes, the method according to the invention requires in particular an estimation of the mean maximum value of the psychoacoustic volume, wherein the procedure carried out for this estimation is hereinafter referred to figure 2 flow chart description.

[0029] Here, the estimated average maximum loudness ...

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Abstract

A method and apparatus for processing audio signals in an entertainment system from at least one audio source modify audio signals during playback by the entertainment system for adjustment to a psychoacoustic loudness set value, wherein this modification is performed in each case on the basis of an average psychoacoustic loudness maximum determined over a predefined time interval for the audio source concerned.

Description

technical field [0001] The present invention relates to methods and apparatus for processing audio signals in entertainment systems. Background technique [0002] Entertainment systems currently use a variety of different audio sources. Each audio source here typically has a certain volume predetermined by the respective hardware, software and associated audio tracks used. After changing audio sources, users are often forced to adjust or re-adjust the master volume to obtain the same volume as previously subjectively perceived. The perceived volume, termed "loudness", depends on the frequency, amplitude and temporal position of the audio signal. [0003] According to the online Wikipedia, loudness is a proportional mapping quantity of human perception of volume (cf. http: / / www.wikipedia.de title "Lautheit" [Loudness], edition 03.08.2015). [0004] Loudness is a psychoacoustic term that describes the way several testers primarily assess perceived loudness. Loudness depend...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03G3/20G10L25/48
CPCG10L25/48H03G3/20H03G3/3005H03G3/3089H03G7/002H03G7/007H03G5/165
Inventor 马尔科·贝尔夫比约恩·雅各布斯
Owner FORD GLOBAL TECH LLC