SOUND FIELD SPATIAL STABILIZER WITH SPECTRAL COHERENCE 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;
calculating a pair-wise spectral coherence between each of the two or more microphone signals; and
gain adjusting the two or more microphone signals responsive to the calculated balance gains, the one or more signal values, and the pair-wise spectral coherence for each of the two or more microphone signals.
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Accused Products
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; calculating a pair-wise spectral coherence between each of the two or more microphone signals; and gain adjusting the two or more microphone signals responsive to the calculated balance gains, the one or more signal values, and the pair-wise spectral coherence 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 coherence calculator to calculate a pair-wise spectral coherence between each of the two or more microphone signals; and a gain adjuster to gain adjust the two or more microphone signals responsive to the calculated balance gains, the one or more signal values, and the pair-wise spectral coherence 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