Sound field spatial stabilizer
First Claim
1. A method for maintaining spatial stability of a received sound field, the method comprising:
- calculating one or more balance gains for two or more microphone signals, wherein each of the two or more microphone signals is from a corresponding one of two or more microphones, the one or more balance gains represent a detected balance of a spatial image of the received sound field, the received sound field received by the microphones;
performing audio processing on the two or more microphone signals resulting in generated signal gains for the two or more microphone signals; and
maintaining the detected balance of the spatial image of the received sound field in two or more output signals over time, wherein maintaining the detected balance of the spatial image includes;
adjusting the generated signal gains over time based on the one or more balance gains, andgenerating the two or more output signals by gain adjusting the two or more microphone signals according to the adjusted generated signal gains.
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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
20 Claims
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1. A method for maintaining spatial stability of a received sound field, the method comprising:
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calculating one or more balance gains for two or more microphone signals, wherein each of the two or more microphone signals is from a corresponding one of two or more microphones, the one or more balance gains represent a detected balance of a spatial image of the received sound field, the received sound field received by the microphones; performing audio processing on the two or more microphone signals resulting in generated signal gains for the two or more microphone signals; and maintaining the detected balance of the spatial image of the received sound field in two or more output signals over time, wherein maintaining the detected balance of the spatial image includes; adjusting the generated signal gains over time based on the one or more balance gains, and generating the two or more output signals by gain adjusting the two or more microphone signals according to the adjusted generated signal gains. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for maintaining spatial stability of a received sound field, the system comprising:
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a balance calculator configured to calculate one or more balance gains for a plurality of microphone signals, the one or more balance gains representing a detected balance of a spatial image of the received sound field, the received sound field received by microphones; a plurality of signal value generators, each of the signal value generators associated with a corresponding one of the microphone signals, the signal value generators configured to generate signal values corresponding to the microphone signals based on an audio processing of the microphone signals; a balance adjuster configured to calculate at least one adjusted balance gain responsive to the generated signal values corresponding to the microphone signals, the at least one adjusted balance gain calculated to maintain the detected balance of the received sound field in two or more output signals over time; and a plurality of gain filters, each one associated with a corresponding one of the microphone signals, the gain filters configured to generate the two or more output signals as gain adjustments of the microphone signals, the gain adjustments responsive to the at least one adjusted balance gain. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method comprising:
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calculating at least one balance gain for a plurality of microphone signals, wherein the microphone signals are from a plurality of microphones, the at least one balance gain representing a detected balance of a spatial image of a sound field as received by the microphones; performing audio processing on the microphone signals resulting in at least one generated signal gain for the microphone signals; and maintaining the detected balance of the spatial image of the received sound field in two or more output signals over time, wherein maintaining the detected balance of the spatial image includes; generating at least one adjusted generated signal gain by adjusting the generated signal gain over time based on the at least one balance gain, and generating the two or more output signals by gain adjusting the microphone signals responsive to the at least one adjusted generated signal gain. - View Dependent Claims (20)
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Specification