Method and System for Performing Audio Signal Processing
OwnerLaurence L. Sheetsinventor
Life of this patent
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Abstract
A method and system for performing audio signal processing is provided. A phase of a signal may be shifted between 0° and 360° for all frequencies of the signal, without any significant delay distortion. The phase shift can be accomplished through the use of two signal outputs (which are each shifted in phase by 90° relative to the other), inverters and an analog summing circuit. Selective use of the inverter on one or both of the 90° phase shifted outputs, and their linear combinations, allows the phase of the audio signal outputs to be shifted between about 0° and about 360° by a recording engineer, for example.
Claims26
A system comprising:
- a delay equalization filter for receiving an audio signal and introducing a compensating delay into the audio signal;
- a Hilbert transform filter-pair for receiving the audio signal from the delay equalization filter and outputting two signal components, the two signal components being about 90° apart from each other in phase;
- one or more inverters for inverting one or both of the two signal components;
- and
- a summing circuit for performing linear combinations of two signals selected from the group of the two signal components and compliments of the two signal components, so as to allow for a phase of the audio signal to be shifted from about 0° to about 360°.
A method of adjusting a phase of an audio signal comprising:
- receiving an audio signal;
- receiving an input from a user that is used to determine a phase shift to a phase of the audio signal to achieve a desired degree of loudness of the audio signal;
- and
- allowing for adjustment of the phase of the audio signal from about 0° to about 360°.
Dependencies are inferred from the claim text.