5. The apparatus of claim 1 , wherein the respective group types for the first and second segment groups specify that the first and second segment groups are related to at least two characters represented in the content of the multimedia stream.
5. The apparatus of claim 1 , wherein the respective group types for the first and second segment groups specify that the first and second segment groups are related to at least two characters represented in the content of the multimedia stream. 7. The apparatus of claim 5 , wherein the audio-visual segments within the second segment group include audio-visual segments representing constant relations between the at least two characters.