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Method and device for processing lossy compressed audio signals

An audio signal, audio technology, used in the field of processing and equipment for lossy compressed audio signals, which can solve expensive, ineffective, etc. problems

Active Publication Date: 2018-12-28
ASK IND GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Said known means are generally designed to be relatively (computationally) expensive and less efficient

Method used

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  • Method and device for processing lossy compressed audio signals
  • Method and device for processing lossy compressed audio signals
  • Method and device for processing lossy compressed audio signals

Examples

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Embodiment Construction

[0059] figure 1A schematic diagram of a device 1 for processing a lossy compressed audio signal 2 is shown. Audio signal 2 can be, for example, a lossy compressed audio file. In particular, it can be, for example, an mp3-coded audio file (mp3 file) which is lossy compressed by means of the mp3 algorithm. Audio files have been able to be at least partially decoded. An audio file can contain, for example, a musical composition.

[0060] The device 1 shown in the exemplary embodiment forms part of an audio system or an audio device 3 of a motor vehicle 4 . Audio device 3 can be part of a vehicle-side multimedia device (not shown) for outputting multimedia content, in particular audio and / or video content, to passengers of motor vehicle 4 . The audio device 3 comprises at least one, for example configured as a loudspeaker device or at least one such integrated signal output device 5 , which is provided for acoustically outputting a processed audio signal 6 to at least one part...

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Abstract

The invention relates to a method for processing a lossy compressed audio signal 2, comprising the steps of: - providing a lossy compressed audio signal 2; - transforming the audio signal 2 into a frequency spectrum, in which the audio frequency The energy of the signal 2 is associated with the frequency of the audio signal 2; -determine the frequency fi of the local amplitude limit in the frequency spectrum; -determine the first selection criterion and preselect the two directly following local amplitude limit frequencies fi, so Said frequency fi meets the first selection criterion; -determines the second selection criterion and selects two directly following preselected frequencies fi of the local amplitude limit which meet the first selection criterion, said frequency fi additionally meets the second selection criterion ; - generating an audio filling signal (AFS); and - processing the audio signal 2 by introducing the audio filling signal (AFS) into a frequency range between frequencies fi meeting the second selection criterion, such that said frequency range is at least partially , in particular completely filled with an audio fill signal (AFS).

Description

technical field [0001] The invention relates to a method for processing lossy compressed audio signals. Background technique [0002] Data compression of audio signals or information, such as music files, is known per se. The purpose of data compression is to reduce the data size of the corresponding audio signal. The data compression can in principle be performed losslessly or losslessly. In addition, loss-inducing data compression, which can be achieved, for example, by data suppression of frequency components at the edge of the human hearing range, should be considered in particular. This should hardly impair the subjective perception of hearing through the earpiece. [0003] Due to the relative reduction in sound quality of a lossy compressed audio signal, it is sometimes desirable to process a lossy compressed audio signal, that is to say at least partially restore the correspondingly lost frequency components or replace them by similar frequency components . [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/02G10L21/02
CPCG10L19/0208G10L21/0364G10L19/0017G10L19/008G10L19/012
Inventor D·佩尔里奇内夫
Owner ASK IND GMBH
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