1. An apparatus in a digital communication system that is capable of receiving audio-visual input signals that represent a speaker who is speaking and capable of creating an animated version of the face of the speaker using a plurality of audio logical units that represent the speaker's speech, said apparatus comprising a content synthesis application processor that: extracts audio features of the speaker's speech and visual features of the speaker's face from the audio-visual input signals; creates audiovisual input vectors from the audio features and the visual features; creates audiovisual configurations from the audiovisual input vectors; and performs a semantic association procedure on the audiovisual input vectors to obtain an association between phonemes that represent the speaker' speech and visemes that represent the speaker's face.