Patent ID: 8433057
Filing Date: 2013-04-30
Classification: G10L

Abstract:
1. A voice band extender for receiving a band-limited speech signal over a telecommunications line to extend a frequency band of the speech signal, comprising: a component separator for removing a noise component from a frequency component of the speech signal to form a noise-suppressed signal, and for removing a frequency component of the noise-suppressed signal from the frequency component of the speech signal to form an extracted-noise signal; a noise-suppressed signal component extender for adding to the noise-suppressed signal a signal having a frequency band higher than a frequency band of the noise-suppressed signal to produce an extended noise-suppressed signal; an extracted-noise signal component extender for adding to the extracted-noise signal a signal having a frequency band higher than a frequency band of the extracted-noise signal to produce an extended extracted-noise signal; a signal intensity adjuster for adjusting signal intensity of at least one of the extended noise-suppressed signal and the extended extracted-noise signal; and a synthesizer for combining the extended noise-suppressed signal and the extended extracted-noise signal with each other, at least one of which is adjusted by said signal intensity adjuster.