13. The terminal according to claim 11 , further comprising: a learning detecting unit which detects the feature quantity indicating the speech feature from the speech signal; a generating unit which generates the conversion data in accordance with the feature quantity detected by the learning detecting unit; and a recording unit which records the feature quantity detected by the learning detecting unit and the conversion data generated by the generating unit, in association with each other, in the storing unit.
13. The terminal according to claim 11 , further comprising: a learning detecting unit which detects the feature quantity indicating the speech feature from the speech signal; a generating unit which generates the conversion data in accordance with the feature quantity detected by the learning detecting unit; and a recording unit which records the feature quantity detected by the learning detecting unit and the conversion data generated by the generating unit, in association with each other, in the storing unit. 14. The terminal according to claim 13 , further comprising an encoding unit which encodes the converted speech signal by using the feature quantity detected by the learning detecting unit.