Heusristics for optimum beta factor and filter order determination in echo canceler systems

An executable program having instructions embodied in a readable medium of a voice/data switch, the program comprising:

• a first module to produce an Echo Return Loss Enhancement (ERLE) value associated with a ratio between a power level of an echo of a signal and a power level of an error signal, the error signal being a difference between an estimated echo of the signal and the echo of the signal;
• and
• a second module to adapt the Beta factor in response to the ERLE value, the Beta factor to update coefficients of taps of an echo cancellation filter.

A switch for adapting between networks, the switch comprising:

• an array of filter taps, each tap having a coefficient, the coefficient multiplying itself with a sample of an input signal resulting in an echo estimate component;
• and
• a Beta factor adaptation module coupled to the array of filter taps, the Beta factor related to the updating of the coefficients, the Beta factor being modified in response to changes in an Echo Return Loss Enhancement (ERLE) signal, the ERLE signal related by the ratio of the power of the echo of the input signal to the power of an error signal, the error signal the difference between an estimated echo of the input signal and the echo of the input signal.

A switch to be adapted to a network, the switch comprising:

• means for producing an Echo Return Loss Enhancement (ERLE) value being a ratio between (i) a power level of an echo of a signal and (ii) a power level of an error signal, the error signal being a difference between an estimated echo of the signal and the echo of the signal;
• and
• means for modifying a factor used to generate the estimated echo based on change in the ERLE value, the factor being decreased in response to an increase in the ERLE value and being increased in response to a decrease in the ERLE value.