Method for correcting acoustic distortion
OwnerJack Schwartz, Tai T. Wuinventors
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Abstract
A method and apparatus useful in both the recording and playback of audio recordings for correcting the effects of acoustic distortion introduced by the room in which the recording is made and/or played. An acoustic test impulse is generated and the response observed to establish the acoustic properties of the room. The response is sampled and used to generate an equalizing function which may be stored and convoluted with the audio signals being recorded or played to substantially eliminate the distortion. In an alternative embodiment the corrected signals may be further convoluted with a function representing the acoustic properties of a different room environment.
Claims12
A method of correcting acoustic distortion in an audio signal introduced by room environment comprising the steps of
- introducing an acoustic test impulse into said room environment at a first predetermined location therein;
- detecting said acoustic test impulse at a second predetermined location in said room environment to thereby provide a room response signal representing said acoustic test impulse as distorted by the acoustic properties of said room environment;
- calculating the reciprocal of said room response signal to provide a set of equalizing values;
- and
- applying said equalizing values to said audio signal to thereby provide an equalized audio signal wherein the distortion introduced by said room environment is substantially eliminated.
Dependencies are inferred from the claim text.