Coding of facial animation parameters (FAPs) for transmission of

Details Coding of facial animation parameters (FAPs) for transmission of Coding of facial animation parameters (FAPs) for transmission of

1998-01-16

2000-05-30

Nguyen, Phu K.

Computer graphics processing and selective visual display system

Computer graphics processing

G06F 1500

Patent

active

060696311

ABSTRACT:
A FAP coding technique that realizes enough coding gain to transmit multiple synthetic talking heads over a band limited channel without introducing perceptible artifacts into the reconstructed synthetic talking heads. This is accomplished by exploiting the spatial correlation of each FAP frame and/or the temporal correlation of the sequence of FAP frames. To remove intra-frame correlation, each FAP frame is transformed prior to segmentation from the n-dimensional space into an m-dimensional subspace where m<n using an energy compaction transform. To remove inter-frame redundancy, the sequence is segmented and each parameter vector is transform coded to decorrelate the vector.

REFERENCES:
patent: 5613056 (1997-03-01), Gasper et al.
patent: 5761401 (1998-06-01), Kobayashi et al.
Parke and Waters, Computer Facial Animation, A K Peters, Wellesley, Massachusetts, 1996, pp. 105-126, 144-147 and 234-237.
Hai Tao et al. "Technical Description of UIUC/Rockwell MPEG-4 SNHC Proposal", M1239, ISO/IEC JTC1/SC29/WG11, Sep. 1996, pp. 1-13.
Eric Petajan et al. "Face and body definition and animation parameters" N1365 ISO/IEC JTC1/SC29/WG11, Oct. 1996, pp. 1-23.

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