4. The device according to claim 3 , wherein the predetermined number of the plurality of segments are consecutive in the audio signal, and wherein the confidence score is based on a probability that the segment belongs to the emotional state.
3. The device according to claim 1 , wherein the processor determines that the current emotional state of the audio signal changes to the other emotional state of the plurality of emotional states when the emotional state of a predetermined number of the plurality of segments is the other emotional state with the confidence score of the emotional state of each of the predetermined number of the plurality of segments being below a predetermined threshold.