A mobile terminal, comprising: a wireless communication unit; a display unit configured to display a content including at least one audio information; an audio output unit; a memory configured to store a plurality of pieces of contact information of a correspondent party; and a controller configured to control an operation related to the content, wherein the audio output unit is configured to output the audio information included in the content; and the controller is further configured to: - receive a first user's command i) to detect a voice of the correspondent party and ii) to set an interval within the content having the voice of the correspondent party included therein, - detect the correspondent party's voice from the content and extract a voice feature vector value for the detected voice of the correspondent party, - display a contact information list on the screen to enable the user to tag the extracted voice feature vector value to the contact information within a phonebook, - receive a second user's command to select specific contact information corresponding to the correspondent party, - store the extracted voice feature vector value in the memory, and - tag the extracted voice feature vector value into the selected specific contact information. a wireless communication unit; a display unit configured to display a content including at least one audio information; an audio output unit; a memory configured to store a plurality of pieces of contact information of a correspondent party; and a controller configured to control an operation related to the content, wherein the audio output unit is configured to output the audio information included in the content; and the controller is further configured to: - receive a first user's command i) to detect a voice of the correspondent party and ii) to set an interval within the content having the voice of the correspondent party included therein, - detect the correspondent party's voice from the content and extract a voice feature vector value for the detected voice of the correspondent party, - display a contact information list on the screen to enable the user to tag the extracted voice feature vector value to the contact information within a phonebook, - receive a second user's command to select specific contact information corresponding to the correspondent party, - store the extracted voice feature vector value in the memory, and - tag the extracted voice feature vector value into the selected specific contact information. - receive a first user's command i) to detect a voice of the correspondent party and ii) to set an interval within the content having the voice of the correspondent party included therein, - detect the correspondent party's voice from the content and extract a voice feature vector value for the detected voice of the correspondent party, - display a contact information list on the screen to enable the user to tag the extracted voice feature vector value to the contact information within a phonebook, - receive a second user's command to select specific contact information corresponding to the correspondent party, - store the extracted voice feature vector value in the memory, and - tag the extracted voice feature vector value into the selected specific contact information.