Correction method and system of the handset end sampling rate deviation

摘要

The present invention discloses a correction method and system of the handset end sampling rate deviation. It is possible to obtain a high -precision sampling rate deviations in real time , handset -end signal to perform sampling rate compensation for the echo after obtaining a transmission -end signal and the receiving -end signal sampling rate after correction is the same it is possible to perform the echo cancellation by sending the cancellation system . The invention is useful in improving the quality of the echo cancellation , the calculation method is simple , cost is low . Correction method handset end sampling rate deviation provided in embodiments of the invention , calculating the transfer function for sending end signal of the reception -end signal at each sampling timing based on the handset -end signal , the transfer function a step of using to obtain the transmission time delay of the handset ends at each sampling timing , delay the transmission time , and , by using the linear relationship between the transmission time delay and sampling rate deviation , the sampling parameter fitting method includes obtaining a sample rate deviation handset end in the timing , and a step of adjusting the sampling rate of the transmission end signal or reception -end signal at each sampling timing based on the sampling rate deviation. [ Selection Figure Figure 1