Abstract: A multicast system includes a multicast device and a communication terminal such as a mobile phone. The mobile phone has a switch, and voice information can be transmitted only while the switch is on. When the voice information is multicast to a plurality of mobile phones, the mobile phone in question transmits the telephone numbers of the plurality of mobile phones to which the voice information is to be multicast, and a group code which specifies the group of the mobile phones, to the multicast device via a network. The multicast device stores, in a storage unit, the group code and the telephone numbers of the mobile phones included in the group, and at the same time, multicasts the received voice information to these mobile phones.

Abstract: In a voice edit device for editing voice information, the voice information is stored in a voice information storage unit 21, text information corresponding to the voice information stored in the voice information storage unit 21 is stored in a text information storage unit 23, and voice/text association information indicating the corresponding relationship between the voice information and the text information is stored in a voice/text association information storage unit 22. When the voice information is edited, a user indicates an edit target portion on a text displayed on a display device 6, and indicates an edit type. Display control means 12 outputs text edit target portion information indicating the text information which corresponds to the edit target portion indicated on the text, and editing means 14 edits the voice information stored in the voice information storage unit 21 on the basis of the text edit target portion information, the voice/text association information and the edit type.