Band broadening apparatus and method

摘要

A band broadening apparatus includes a processor configured to analyze a fundamental frequency based on an input signal bandlimited to a first band, generate a signal that includes a second band different from the first band based on the input signal, control a frequency response of the second band based on the fundamental frequency, reflect the frequency response of the second band on the signal that includes the second band and generate a frequency-response-adjusted signal that includes the second band, and synthesize the input signal and the frequency-response-adjusted signal.

主权项

1. A band broadening apparatus comprising a processor in communication with a memory, wherein the memory contains programmed instructions which when executed by the processor perform the following steps:
analyze a fundamental frequency based on an input speech signal bandlimited to a first band, generate a second speech signal that includes a second band different from and bandbroadened from the first band based on the input speech signal, control a frequency response of the second band based on the fundamental frequency, reflect the frequency response of the second band on the second speech signal that includes the second band and generate a frequency-response-adjusted speech signal that includes the second band, and synthesize the input speech signal and the frequency-response-adjusted signal, wherein the processor controls sound power of the frequency response of the second band such that more attenuation is given when the fundamental frequency of the bandlimited first band is high and that less attenuation is given when the fundamental frequency of the bandlimited first band is low.