Sound field spatial stabilizer with structured noise compensation
First Claim
1. A computer implemented method for maintaining spatial stability of a sound field comprising:
- calculating balance gains for each of two or more microphone signals;
calculating one or more signal values for each of the two or more microphone signals;
detecting structured noise content for each of the two or more microphone signals;
mixing a first microphone signal of the two or more microphone signals with a second microphone signal of the two or more microphone signals responsive to the detected structured noise; and
gain adjusting the two or more microphone signals, including the mixed first microphone signal and second microphone signal, responsive to the calculated balance gains and the one or more signal values for each of the two or more microphone signals.
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Abstract
In a system and method for maintaining the spatial stability of a sound field a balance gain may be calculated for two or more microphone signals. The balance gain may be associated with a spatial image in the sound field. Signal values may be calculated for each of the microphone. The signal values may be signal estimates or signal gains calculated to improve a characteristic of the microphone signals. The differences between the signal values associated with each microphone signal may be limited although some difference between signal values may be allowable. One or more microphone signals are adjusted responsive to the two or more balance gains and the signal gains to maintain the spatial stability of the sound field. The adjustments of one or more microphone signals may include mixing of two or more microphone. The signal gains are applied to the two or more microphone signals.
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Citations
22 Claims
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1. A computer implemented method for maintaining spatial stability of a sound field comprising:
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calculating balance gains for each of two or more microphone signals; calculating one or more signal values for each of the two or more microphone signals; detecting structured noise content for each of the two or more microphone signals; mixing a first microphone signal of the two or more microphone signals with a second microphone signal of the two or more microphone signals responsive to the detected structured noise; and gain adjusting the two or more microphone signals, including the mixed first microphone signal and second microphone signal, responsive to the calculated balance gains and the one or more signal values for each of the two or more microphone signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for maintaining spatial stability of a sound field comprising:
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a balance calculator to calculate balance gains for each of two or more microphone signals; two or more signal value generators, each one associated with one of the two or more microphone signals, to calculate one or more signal values; a structured noise detector to detect structured noise content for each of the two or more microphone signals; a channel mixer to mix a first microphone signal of the two or more microphone signals with a second microphone signal of the two or more microphone signals responsive to the detected structured noise; and a gain adjuster to adjust the two or more microphone signals, including the mixed first microphone signal and second microphone signal, responsive to the calculated balance gains and the one or more signal values for each of the two or more microphone signals. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification