SPEECH SIGNAL COMPRESSION DEVICE, SPEECH SIGNAL COMPRESSION METHOD, AND PROGRAM

摘要

It is possible to provide a speech signal noise removal device for surely removing a noise mixed in a speech. A pitch analysis section (2) calculates a moving correction average of the frequency of the pitch component of the speech represented by the original speech signal acquired by a speech input section (1). A variable type filter (3) extracts a pitch component by removing components other than the moving correction average obtained by the pitch analysis section (2) and its vicinity from the original speech signal. An absolute value detection section (4) obtains an absolute value of the pitch component. A low-pass filter (5) filters the signal representing the absolute value obtained and generates a gain adjustment signal. The original speech signal is output after subjected to timing adjustment by a delay section (6) and amplified or attenuated by a gain adjustment section (7) by using the gain decided by the value of the gain adjustment signal before being output.