4. The electronic device according to claim 1 , wherein the control unit is configured to identify timestamp information on the time at which a specific frequency waveform corresponding to the part of the voice starts and the time at which the specific frequency waveform ends.
4. The electronic device according to claim 1 , wherein the control unit is configured to identify timestamp information on the time at which a specific frequency waveform corresponding to the part of the voice starts and the time at which the specific frequency waveform ends. 5. The electronic device according to claim 4 , wherein the control unit is configured to synchronize the part of the voice data and the part of the text data by using the identified timestamp information to store the part of the voice data and the part of the text data by associating each other.