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Bass enhancement and separation of an audio signal into a harmonic and transient signal component

A technology for audio signals and transient signals, applied in speech analysis, frequency response correction, instruments, etc., can solve problems such as large computing workload and high memory requirements

Active Publication Date: 2017-07-11
HARMAN BECKER AUTOMOTIVE SYST
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  • Summary
  • Abstract
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Problems solved by technology

However, in currently used systems, the methods used to separate the signal into harmonic and transient signal components suffer from large computational workload and high memory requirements

Method used

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  • Bass enhancement and separation of an audio signal into a harmonic and transient signal component
  • Bass enhancement and separation of an audio signal into a harmonic and transient signal component
  • Bass enhancement and separation of an audio signal into a harmonic and transient signal component

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Embodiment Construction

[0030] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings. It should be understood that the following description of the embodiments is not in any limiting sense. The scope of the invention is not intended to be limited by the embodiments described herein, or by the drawings, which are for illustration only.

[0031] The drawings are to be regarded as schematic illustrations and elements shown in the drawings are not necessarily shown to scale. Also, various elements are illustrated such that their functions and general usage become apparent to those skilled in the art. Any connection or coupling between functional blocks, devices, components or other physical or functional components shown in the figures or described herein may also be through an indirect connection or coupling. Unless expressly stated otherwise, coupling between components may also be established via wireless connections. Functional ...

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Abstract

A method for separating an audio signal into a harmonic signal component and a transient signal component is disclosed. The method includes the steps of: transferring the audio signal into a frequency space in order to obtain a transferred audio signal in dependence on frequency and time and applying a non-linear smoothing filter to the transferred audio signal over frequency to obtain a filtered transient signal T (n, k) in which the harmonic signal component is suppressed relative to the transient signal component. The method further includes applying the non-linear smoothing filter to the transferred audio signal over time to obtain a filtered harmonic signal S (n, k) in which the transient signal component is suppressed relative to the harmonic signal component and determining the harmonic signal component and the transient signal component based on the filtered harmonic signal and the filtered transient signal.

Description

technical field [0001] Various embodiments relate to techniques for separating an audio signal into harmonic and transient signal components, to a method for generating a bass enhanced audio signal. Additionally, an audio component configured to generate a bass enhanced audio signal is provided. Background technique [0002] From a physical standpoint, a loudspeaker with a small diaphragm and low depth cannot generate the volume changes required for low frequency playback. In short, it can be said that small speakers are not able to provide enough bass. One way to avoid this problem is to use harmonic extension, which exploits the psychoacoustic effect that our auditory system is able to detect and thus perceive fundamental tones outside their harmonics, even if the former are not present in the perceived signal. [0003] Another possibility exists using an accurate modeling of the loudspeakers used. If this modeling is possible, an element called an image filter can be u...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0272G10L21/02
CPCG10L21/02G10L21/0272H04R3/04G10L19/0208G10L19/265
Inventor M.克里斯托夫
Owner HARMAN BECKER AUTOMOTIVE SYST
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