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Method for Computer Animation of Lip Movements

IP.com Disclosure Number: IPCOM000076535D
Original Publication Date: 1972-Mar-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 13K

Publishing Venue

IBM

Related People

Bagley, JD: AUTHOR [+2]

Abstract

One of the most useful techniques for providing realism to cartoon animation of human figures is that of lip animation. Described is a technique for computer-generated lip animation for use in a computer animation system. The technique has two components. The first component is a speech-processing system capable of translating an input stream of live speech into accurately timed sequences of visually correlated speech events.

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Method for Computer Animation of Lip Movements

One of the most useful techniques for providing realism to cartoon animation of human figures is that of lip animation. Described is a technique for computer- generated lip animation for use in a computer animation system. The technique has two components. The first component is a speech-processing system capable of translating an input stream of live speech into accurately timed sequences of visually correlated speech events. Although related to speech recognition, the system is not a recognition system and, therefore, it need not distinguish between acoustical events which are produced by identical facial positions, such as the voiced "v" and the unvoiced "f" On the other hand, there are some facial positions which cannot be determined from the acoustic signal, such as the position of the lips during a period of silence which may be closed when following a final "p" or open as when following a final "t".

Thus, in addition to the information contained in the acoustical signal, the speech-processing system component has as available information he lexical representation of the acoustical signal (i.e., a copy of the script) and the speech- system processes, both sources of information to produce the precisely timed visual correlates.

The second component of the animation system is an animation program which, given the visual data for each speech sound, generates the intermediate frames to produce smooth animation.

The cartoon...