DVE system with normalized selection
First Claim
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1. A digital voice enhancement communication system comprising:
- a plurality of microphones;
at least one loudspeaker;
a switch for selecting which microphone to electrically couple to said at least one loudspeaker so that a listener at said at least one loudspeaker can hear the speech of a talker at the selected microphone, the selection decision being based on a given function of the speech of a respective talker relative to his/her acoustic environment at the respective microphone, wherein said selection decision is based on the ratio where SNNR is the ratio of speech plus noise to noise, and f is a given function thereof.
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Abstract
In a DVE, digital voice enhancement, communication system, the selection decision for choosing which microphone to be active is based on a given function of the speech of a respective talker relative to his/her acoustic environment at the respective microphone. The selection decision is based on a selection technique normalizing at least one of a) different microphone sensitivities and b) different background noise levels at the respective microphones, preferably based on the ratio of how much louder a talker speaks over the background noise at his/her respective microphone.
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16 Claims
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1. A digital voice enhancement communication system comprising:
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a plurality of microphones;
at least one loudspeaker;
a switch for selecting which microphone to electrically couple to said at least one loudspeaker so that a listener at said at least one loudspeaker can hear the speech of a talker at the selected microphone, the selection decision being based on a given function of the speech of a respective talker relative to his/her acoustic environment at the respective microphone, wherein said selection decision is based on the ratio where SNNR is the ratio of speech plus noise to noise, and f is a given function thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A selection method for a digital voice enhancement communication system having a plurality of microphones, and at least one loudspeaker, comprising selecting which microphone to electrically couple to said at least one loudspeaker so that a listener at said at least one loudspeaker can hear the speech of a talker at the selected microphone, basing the selection decision on a given function of the speech of a respective talker relative to his/her acoustic environment at the respective microphone,
and comprising basing the selection decision on the ratio -
N N R = f ( voice + noise ) f ( noise ) where SNNR is the ratio of speech plus noise to noise, and f is a given function thereof. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification