System for perceived enhancement and restoration of compressed audio signals
AssigneeHarman International Industries, Incorporated
InventorGilbert Arthur Joseph Soulodre
Life of this patent
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Abstract
A system for processing compressed audio includes a signal enhancer module configured to generate one or more signal treatments. The one or more signal treatments may be generated by the signal enhancer module based on analysis of the incoming audio signal. Alternatively, or in addition, characteristics of the incoming audio signal may be provided to the signal enhancer module for use in generating the one or more signal treatments. The one or more signal treatments may be added to file audio signals.
Claims24
A system for repair of compressed audio signals, comprising:
- a processor;
- a sampler module executable by the processor to provide sequential samples from an audio signal;
- and
- a signal enhancer module executable by the processor to receive one or more sample components of the audio signal to identify lost parts of the audio signal in the one or more sample components of respective sequential samples;
- wherein the signal enhancer module is further executable by the processor to provide a corresponding signal treatment and to apply the corresponding signal treatment to each of the one or more sample components of respective sequential samples having a corresponding identified lost part,
- wherein the processor is configured to determine a quality of the audio signal and to adjust a gain for each corresponding signal treatment that is applied to the respective sequential samples having the corresponding identified lost part based on the determined quality, and
- wherein the corresponding signal treatment includes one of a bandwidth extension, an in-band harmonic fill, a transient enhancement, a sound stage expansion, a reverb fill, a masked signal fill, and a harmonic phase alignment.
A non-transitory computer readable storage medium storing computer readable instructions executable by a processor to repair compressed audio signals, the computer readable medium comprising:
- instructions executable by the processor to provide a sequence of samples of an audio signal;
- instructions executable by the processor to provide the samples in the sequence into sample components the audio signal;
- instructions executable by the processor to identify a missing part of the audio signal in a sample component included within the sample components in the sequence of samples;
- instructions executable by the processor to provide and apply to the audio signal, a signal treatment for the sample component included within the sample components in response to an identification of the missing part of the audio signal in the sample component;
- instructions executable by the processor to determine a quality of the audio signal based on parameters related to the audio signal;
- and
- instructions to adjust a gain of the signal treatment that is applied to the missing part of the audio signal in accordance with the determined quality of the audio signal,
- wherein the signal treatment includes one of a bandwidth extension, an in-band harmonic fill, a transient enhancement, a sound stage expansion, a reverb fill, a masked signal fill, and a harmonic phase alignment.
A method of repairing compressed audio signals comprising:
- separating an audio signal into samples using a processor;
- providing sample components of the samples with the processor, where the sample components are representative of characteristics of the audio signal;
- analyzing sample components of a characteristic of the audio signal with the processor to identify sample components having a lost part of the audio signal;
- applying a signal treatment, with the processor, to only those sample components identified as having the lost part of the audio signal;
- determining a quality of the audio signal with the processor, and
- adjusting a gain of the signal treatment that is applied to the lost part of the audio signal, with the processor, based on the determined quality,
- wherein applying the signal treatment, with the processor further comprising applying the signal treatment that includes one of a bandwidth extension treatment, a transient enhancement treatment, and a reverberation fill treatment to only those sample components having the lost part of the audio signal.
Dependencies are inferred from the claim text.