Speech coder output transformation method for reducing audible noise

In a speech communication system having a speech decoder followed by a compander, the speech decoder having an output signal with a plurality of output values, a method for reducing audible noise generated by the compander during the absence of a voice signal, the steps of the method comprising:

• selecting a range of output values from the plurality of output values of the output signal, wherein the range of output values is defined by the output values of greater than zero and less than or equal to +2;
• calculating each output value of the plurality of output values;
• determining if an output value of the plurality of output values falls within the range;
• adding a predetermined constant value to the output signal if the determining determines that the output value of the plurality of output values falls within the range;
• and
• supplying the output signal to the compander.

In a speech communication system having a speech decoder followed by a compander, the speech decoder configured to cause a reduction in audible noise generated by the compander during the absence of a voice signal, the speech decoder comprising:

• an output signal with a plurality of output values;
• a controller configured to select a range of output values from the plurality of output values of the output signal, wherein the range of output values is defined by the output values of less than zero and greater than or equal to −2, the controller further configured to calculate each output value of the plurality of output values and determine if an output value of the plurality of output values falls within the range;
• an adder configured to add a predetermined constant value to the output signal if the controller determines that the output value of the plurality of output values falls within the range;
• and
• an output supplier configured to supply the output signal to the compander.

In a speech communication system having a speech decoder followed by a compander, the speech decoder configured to cause a reduction in audible noise generated by the compander during the absence of a voice signal, the speech decoder comprising:

• an output signal with a plurality of output values;
• a controller configured to select a range of output values from the plurality of output values of the output signal, wherein the range of output values is defined by the output values of greater than zero and less than or equal to +2, the controller further configured to calculate each output value of the plurality of output values and determine if an output value of the plurality of output values falls within the range;
• an adder configured to add a predetermined constant value to the output signal if the controller determines that the output value of the plurality of output values falls within the range;
• and
• an output supplier configured to supply the output signal to the compander.