COMMUNICATION SYSTEM NOISE CANCELLATION POWER SIGNAL CALCULATION TECHNIQUES

摘要

In order to enhance the quality of a communication signal derived from speech and noise, a filter (50) divides a communication s ignal into a plurality of frequency band signals. A calculator generates a plurality of power band signals each having a power band value and corresponding to one of the frequency band signals. The power band values are based on estimating, over a time period, the power of one of the frequency band signals. The time period is different for different ones of the frequency band signals. The power band values are used to calculate the weighting factors which are used to alter the frequency band signals that are combined to generate an improved communication signal (170).