Signal bandwidth extending apparatus

摘要

A signal bandwidth extending apparatus including: a bandwidth extending section configured to extend a frequency bandwidth of a target signal, the target signal included in an input signal; a calculating section configured to calculate a degree of the target signal included in the input signal; and a controller configured to change a method of extending the frequency bandwidth by the bandwidth extending section according to a result of the calculating section.

主权项

1. A signal bandwidth extending apparatus comprising a hardware processor, wherein the hardware processor is configured to function as sections comprising:
a bandwidth extending section configured to extend a frequency bandwidth of a target sound signal, the target sound signal being included in an input sound signal; a calculating section configured to calculate a degree to which the target sound signal is included in the input sound signal, the degree being a value representing how much of the input sound signal is made up of the target sound signal; and a controller configured to change a method of extending the frequency bandwidth by the bandwidth extending section based on a result of the calculating section; wherein the controller is configured to control the bandwidth extending section so as to (i) extend the target sound signal to a first frequency bandwidth in a first processing unit size, when the degree to which the target sound signal is included in the input sound signal is smaller than a first threshold value, (ii) extend the target sound signal to a second frequency bandwidth that is wider than the first frequency bandwidth in the first processing unit size, when the degree to which the target sound signal is included in the input sound signal is larger than the first threshold value and smaller than a second threshold value, and (iii) extend the target sound signal to the second frequency bandwidth in a second processing unit size that is smaller than the first processing unit size, when the degree to which the target sound signal is included in the input sound signal is smaller than the second threshold value.