VOICE BAND EXTENSION DEVICE

摘要

There is provided a voice band extension device (100) capable of realizing a voice signal of natural hearing feeling after band extension. The voice band extension device (100) includes an extended voice generator for generating an extended voice signal having a band not owned by an original voice from an original signal, and an adjustment adder (20) for detecting a timing shift between the original voice signal and the extended voice signal, adjusting the timing of the original voice signal or the extended voice signal according to the detected timing shift, and combining the both signals after the timing adjustment. The detection of the timing shift is performed, for example, by zero crossing and cross correlation.