Method and telecommunications system for supporting multimedia services via an interface and a correspondingly configured subscriber terminal

(57) In according to the method of summary book invention] a communications system (UNW), In order to transmit N members' audio signal, N logic voice channels (for example, S11, S12, S13) are used, and the logic picture channel (for example, B11) of only preselected M (M<=N) individual is used in order to transmit M person's member's image signal. Subscriber terminal apparatus (MMS) outputs the audio signal of the member of N person who received through the interface (A. I. Artificial Intelligence, CI) with transceiving equipment to a member, and displays the image signal of the member of M person who received with transceiving equipment. By choosing from many picture channels like expected, one picture channel (for example, B11) or two or more picture channels, The transmission band width needed for multimedia service in an interface (for example, radio interface to a movable body radio member) can be constituted flexibly, and it can be made to consistent with the existing data-transmission capacity of an interface. A means by which the communications system by the present invention transmits the audio signal with which preparation processing of the member of N person in N logic voice channels was carried out, It has a means (SFU) to choose the logic voice channel of M (M<=N) individual, and a means to transmit M person's member's image signal in M picture channels.