Method and apparatus for producing lip-movement parameters in a

Details Method and apparatus for producing lip-movement parameters in a Method and apparatus for producing lip-movement parameters in a

1997-12-02

2000-01-11

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

Application

704201, 704235, G10L 918, G06T 1700

Patent

active

060146257

ABSTRACT:
In a three-dimensional model-based coding system, a shape of mouth, especially, a shape of lip, among a shape of face, has an important visual information. As each person has the different shape of lip, however, it is desirable to transform the shape of lip based on an individual person. First, a characteristic three-dimensional lip model based on the individual person is generated by matching a three-dimensional lip model to a basic lip of the individual person. Subsequently, the characteristic three-dimensional lip model is converted into a two-dimensional lip model and rotated according an angle of a actual lip image. In case that the person is talking, the two-dimensional lip model is reconstructed based on a recognized syllable. Finally, a difference between the two-dimensional lip model and the actual lip image is calculated. As not a whole real lip image but the difference between the actual image and the two-dimensional lip model similar to the actual lip image is transmitted, the amount of transmission data can be reduced.

REFERENCES:
patent: 4260229 (1981-04-01), Bloomstein
patent: 5313522 (1994-05-01), Slager
patent: 5500673 (1996-03-01), Zhou
patent: 5586215 (1996-12-01), Stork et al.
patent: 5841470 (1998-12-01), Welsh
patent: 5907351 (1999-05-01), Chen et al.

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