Patent ID: 6996231

Claim:
A method of converging an adaptive filter of a communication channel between a near end and a far end, and having a hybrid connection responsible for transmission echo of near end signal, comprising the steps of: initializing a nominal step size value and a penalty point value; combining said nominal step size value and said penalty point value to generate a step size value; and dynamically changing said step size value in response to a characteristic measure of a quality of said communication channel, wherein said step size value is decreased: by adjusting said penalty point value when a tone originating from the far end of the communication channel is detected; by adjusting said penalty point value when full convergence is achieved; by adjusting said nominal step size value when an achieved combined loss is approximately 15 dB; by adjusting said penalty point value when a power level of a residual error signal, P e , is less than −60 dBm0 or a far-end channel signal, P x , is less than −45 dBm0, that is when P e <−60 dBm0 or P x <−45 dBm0; by adjusting said penalty point value when a level of said channel's near-end background noise is high; and by adjusting said penalty point value when weak double-talk in said communication channel is detected.