DVE system with dynamic range processing
First Claim
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1. A digital voice enhancement communication system comprising:
- a first acoustic zone;
a second acoustic zone;
a microphone at said first zone;
a loudspeaker at said second zone and electrically coupled to said microphone such that the speech of a person at said first zone can be heard by a person at said second zone as transmitted by an electrical signal from said microphone to said loudspeaker;
a dynamic range processor having an input from said microphone and an output to said loudspeaker and processing said input according to a slope intercept formula when said input is above a given threshold, wherein said input is x, said output is y, and when x is greater than said given threshold,
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Abstract
A digital voice enhancement, DVE, communication system includes a dynamic range processor and method altering dynamic range of the electrical signal from the microphone to the loudspeaker by applying nonlinear and/or differential gain thereto, preferably applied by a slope intercept formula.
17 Citations
16 Claims
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1. A digital voice enhancement communication system comprising:
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a first acoustic zone;
a second acoustic zone;
a microphone at said first zone;
a loudspeaker at said second zone and electrically coupled to said microphone such that the speech of a person at said first zone can be heard by a person at said second zone as transmitted by an electrical signal from said microphone to said loudspeaker;
a dynamic range processor having an input from said microphone and an output to said loudspeaker and processing said input according to a slope intercept formula when said input is above a given threshold, wherein said input is x, said output is y, and when x is greater than said given threshold, - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for processing an electrical signal in a digital voice enhancement communication system having a first acoustic zone, a second acoustic zone, a microphone at said first zone, a loudspeaker at said second zone and electrically coupled to said microphone such that the speech of a person at said first zone can be heard by a person at said second zone as transmitted by an electrical signal from said microphone to said loudspeaker, said method comprising altering dynamic range of said electrical signal by applying at least one of nonlinear and differential gain thereto, and comprising:
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detecting the level of said electrical signal from said microphone with a signal level detector having an input from said electrical signal from said microphone, providing said signal level detector with an output having a first state when said electrical signal is below a designated threshold, and having a second state when said electrical signal is above said threshold;
selectively applying first and second gain factors to said electrical signal from said microphone at a first gain element having a first input from said electrical signal from said microphone, a second input from said output of said signal level detector, and having an output, applying said first gain factor to said electrical signal at said first input of said first gain element when said second input of said first gain element receives said first state from said output of said signal level detector, applying a second different gain factor to said electrical signal at said first input of said first gain element when said second input of said first gain element receives said second state from said output of said signal level detector;
applying a third gain factor to said electrical signal by a second gain element having an input from said output of said first gain element, and an output to said loudspeaker, applying said third gain factor to said electrical signal at said input of said second gain element for transmission to said loudspeaker. - View Dependent Claims (8, 9, 10, 11)
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12. A method for processing an electrical signal in a digital voice enhancement communication system having a first acoustic zone, a second acoustic zone, a microphone at said first zone, a loudspeaker at said second zone and electrically coupled to said microphone such that the speech of a person at said first zone can be heard by a person at said second zone as transmitted by an electrical signal from said microphone to said loudspeaker, said method comprising processing said electrical signal from said microphone according to a slope intercept formula when said electrical signal is above a given threshold, and comprising processing said electrical signal according to
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13. A method for processing an electrical signal in a digital voice enhancement communication system having a first acoustic zone, a second acoustic zone, a microphone at said first zone, a loudspeaker at said second zone and electrically coupled to said microphone such that the speech of a person at said first zone can be heard by a person at said second zone as transmitted by an electrical signal from said microphone to said loudspeaker, said method comprising processing said electrical signal from said microphone according to a slope intercept formula when said electrical signal is above a given threshold, and comprising processing said electrical signal according to
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14. A method for processing an electrical signal in a digital voice enhancement communication system having a first acoustic zone, a second acoustic zone, a microphone at said first zone, a loudspeaker at said second zone and electrically coupled to said microphone such that the speech of a person at said first zone can be heard by a person at said second zone as transmitted by an electrical signal from said microphone to said loudspeaker, said method comprising processing said electrical signal from said microphone according to a slope intercept formula when said electrical signal is above a given threshold, and comprising processing said electrical signal according to
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15. A method for processing an electrical signal in a digital voice enhancement communication system having a first acoustic zone, a second acoustic zone, a microphone at said first zone, a loudspeaker at said second zone and electrically coupled to said microphone such that the speech of a person at said first zone can be heard by a person at said second zone as transmitted by an electrical signal from said microphone to said loudspeaker, said method comprising processing said electrical signal from said microphone according to a slope intercept formula when said electrical signal is above a given threshold, and comprising processing said electrical signal according to
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16. A method for processing an electrical signal in a digital voice enhancement communication system having a first acoustic zone, a second acoustic zone, a microphone at said first zone, a loudspeaker at said second zone and electrically coupled to said microphone such that the speech of a person at said first zone can be heard by a person at said second zone as transmitted by an electrical signal from said microphone to said loudspeaker, said method comprising processing said electrical signal from said microphone according to a slope intercept formula when said electrical signal is above a given threshold, and processing said electrical signal according to
Specification