Method and device for microphone selection
AssigneeLimes Audio AB
InventorsChristian Schüldt, Fredric Lindström
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Abstract
The present invention relates to a device, such as an audio communication device, for combining a plurality of microphone signals xn(k) into a single output signal y(k). The device comprises processing means configured to calculate control signals fn(k), and control means configured to select which microphone signal xn(k) or which combination of microphone signals xn(k) to use as output signal y(k) based on said control signals fn(k). To improve the selection, the device comprises linear prediction filters for calculating linear prediction residual signals en(k) from the plurality of microphone signals xn(k), and the processing means is configured to calculate the control signals fn(k) based on said linear prediction residual signals en(k).
Claims21
A device for combining a plurality of microphone signals xn(k) into a single output signal y(k), comprising:
- processing means configured to calculate control signals fn(k);
- control means configured to select which microphone signal xn(k) or which combination of microphone signals xn(k) to use as output signal y(k) based on said control signals fn(k), characterised in that said device comprises linear prediction filters for calculating linear prediction residual signals en(k) from said plurality of microphone signals xn(k), and in that said processing means is configured to calculate said control signals fn(k) based on said linear prediction residual signals en(k).
A method for combining a plurality of microphone signals xn(k) into a single output signal y(k), comprising the steps of:
- calculating control signals fn(k);
- selecting, based on said control signals fn(k), which microphone signal xn(k) or which combination of microphone signals xn(k) to use as output signal y(k),
- characterised by the steps of:
- calculating linear prediction residual signals en(k) from said plurality of microphone signals xn(k), and
- calculating said control signals fn(k) based on said linear prediction residual signals en(k).
A non-transitory computer-readable medium with instructions for combining a plurality of microphone signals xn(k) into a single output signal y(k) stored thereon, which when executed by at least one processor, configure the at least one processor to perform operations comprising:
- calculating control signals fn(k);
- selecting, based on said control signals fn(k), which microphone signal xn(k) or which combination of microphone signals xn(k) to use as output signal y(k), characterised by the steps of:
- calculating linear prediction residual signals en(k) from said plurality of microphone signals xn(k), and
- calculating said control signals fn(k) based on said linear prediction residual signals en(k).
Dependencies are inferred from the claim text.