Apparatus and method of improving intelligibility of voice signal

An apparatus for improving intelligibility of a voice signal, the apparatus comprising:

• a voice signal separation module separating a received voice signal into a silence signal, a voiced sound signal, and an unvoiced sound signal;
• a band power adjustment module, when the received voice signal is the voiced sound signal, adjusting band power for every band of the received voice signal on the basis of band power for every band of a background noise signal on a call receiving side;
• and
• a first frame power adjustment module adjusting frame power of a voice signal amplified by the band power adjustment module on the basis of frame power of the background noise signal.

A method of improving intelligibility of a voice signal, the method comprising:

• analyzing a background noise signal on a call receiving side;
• classifying a received voice signal into a silence signal, an unvoiced sound signal, and a voiced sound signal;
• and
• intensifying the classified unvoiced sound signal and voiced sound signal on the basis of the analyzed background noise signal on the call receiving side.

A method of improving intelligibility of a voice signal, the method comprising:

• separating a received voice signal into a silence signal, a voiced sound signal, and an unvoiced sound signal;
• when the received voice signal is the voiced sound signal, adjusting band power for every band of the received voice signal on the basis of band power for every band of a received background noise signal on a call receiving side;
• and
• adjusting frame power of a voice signal amplified by the adjusting of the band power on the basis of frame power of the background noise signal.