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.
Claims9
A system to repair compressed audio signals, the system comprising:
- a processor;
- and
- a masked signal fill module executable by the processor to:
- receive a compressed audio input signal for audio playback including a plurality of signal components at a plurality of frequencies;
- compare a first energy level for a first signal component on the compressed audio input signal to a simultaneous masking threshold;
- determine that a first frequency of the first signal component is inaudible for a listener in response to the first energy level being below the simultaneous masking threshold, wherein a second frequency of a second signal component on the compressed audio input signal causes the first frequency of the first signal component to be inaudible for the listener;
- and
- apply a first signal treatment to the first signal component to generate a first increased energy level for the first signal component, the first increased energy level being equal to the simultaneous masking threshold;
- and
- wherein the masked signal fill module is further executable by the processor to apply the first signal treatment by amplifying the first signal component to generate the first increased energy level.
A non-transitory computer readable storage medium storing computer readable instructions executable by a processor to repair compressed audio signals, the computer readable storage medium comprising:
- instructions executable by the processor to receive a compressed audio input signal including a plurality of signal components at a plurality of frequencies;
- instructions executable by the processor to compare a first energy level for a first signal component on the compressed audio input signal to a simultaneous masking threshold;
- instructions executable by the processor to determine that the first signal component is inaudible for a listener in response to the first energy level being below the simultaneous masking threshold, wherein a second signal component on the compressed audio input signal causes the first signal component to be inaudible for the listener;
- instructions executable by the processor to apply a first signal treatment to the first signal component to generate a first increased energy level for the first signal component, the first increased energy level being equal to the simultaneous masking threshold,
- wherein the instructions executable by the processor to apply the first signal treatment includes instructions executable by the processor to amplify the first signal component to provide the first increased energy level.
A system to repair compressed audio signals, the system comprising:
- a processor;
- and
- a masked signal fill module executable by the processor to:
- receive a compressed audio input signal including a plurality of signal components at a plurality of frequencies;
- compare a first energy level for a first signal component on the compressed audio input signal to a simultaneous masking threshold;
- determine that a first frequency of the first signal component is inaudible for a listener in response to the first energy level being below the simultaneous masking threshold;
- and
- apply a first signal treatment to the first signal component by amplifying the first signal component to generate a first increased energy level for the first signal component that is equal to the simultaneous masking threshold such that the amplified first signal component is audible to the listener,
- wherein a second frequency of a second signal component on the compressed audio input signal causes the first frequency of the first signal component to be inaudible for the listener.
Dependencies are inferred from the claim text.