METHOD AND APPARATUS FOR CALIBRATING A SOUND BEAM-FORMING SYSTEM
First Claim
1. A method for calibrating an audio beam-forming system, comprising:
- providing a test signal to a plurality of speaker drivers through an electronic beam-forming network surround channel input;
detecting sound propagated from said plurality of speaker drivers in response to said test signal using a microphone positioned at a listening position; and
adjusting at least one corresponding signal relationship between said surround channel input and at least one of said plurality of speaker drivers in conformity with a result of said detecting, to control propagation of surround channel information in a predetermined direction toward said listening position, such that information provided to said surround channel input is propagated with a first directivity pattern having substantial attenuation in said predetermined direction and at least one lobe having a directivity peak located substantially away from said predetermined direction.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and apparatus system for calibrating a sound beam-forming system provides calibration of low cost alternatives to present array beam-forming systems. A test signal is supplied to multiple speaker drivers and is detected from a microphone signal supplied from a microphone positioned at a listening position. A signal relationship between surround channel information supplied to the multiple speaker drivers is adjusted in conformity with the detected signal so that the surround channel information is substantially attenuated along a direct path toward the listening position. The result is that the surround channel information is propagated in a directivity pattern having at least one primary lobe directed away from the listening position so that the surround channel information is diffused by reflection before reaching the listening position. The signal relationship may be controlled by multiple digital filters that maximize late vs. early response of the surround channel information.
-
Citations
20 Claims
-
1. A method for calibrating an audio beam-forming system, comprising:
-
providing a test signal to a plurality of speaker drivers through an electronic beam-forming network surround channel input; detecting sound propagated from said plurality of speaker drivers in response to said test signal using a microphone positioned at a listening position; and adjusting at least one corresponding signal relationship between said surround channel input and at least one of said plurality of speaker drivers in conformity with a result of said detecting, to control propagation of surround channel information in a predetermined direction toward said listening position, such that information provided to said surround channel input is propagated with a first directivity pattern having substantial attenuation in said predetermined direction and at least one lobe having a directivity peak located substantially away from said predetermined direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method for calibrating an audio beam-forming system, comprising:
-
providing a test signal to a plurality of speaker drivers located in separate cabinets, through an electronic beam-forming network audio input; detecting sound propagated from said plurality of speaker drivers in response to said test signal using a microphone positioned at a listening position; and adjusting at least one corresponding signal relationship between said input and each of said plurality of speaker drivers in conformity with a result of said detecting, to control propagation of sound in a predetermined direction toward said listening position, such that sound propagating in directions other than said predetermined direction is minimized. - View Dependent Claims (11, 12, 13, 14)
-
-
15. A method for calibrating an audio beam-forming system to maximize separation between first audio program information provided for a first listening position and second audio program information provided for a second listening position, comprising:
-
providing a test signal to a plurality of speaker drivers located in separate cabinets, through an electronic beam-forming network first audio input for receiving said first audio program information; detecting sound propagated from said plurality of speaker drivers in response to said test signal using a microphone positioned in at least one of said first and second listening positions; and adjusting at least one corresponding signal relationship between said first audio input and each of said plurality of speaker drivers in conformity with a result of said detecting, to control propagation of sound in a first predetermined direction toward said first listening position, such that sound propagating toward a second listening position resulting from said test signal supplied to said first audio input is minimized. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification