Coding of facial animation parameters (FAPs) for transmission of synthetic talking head video over band limited channels
US6069631A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1998 |
| Grant date | May 30, 2000 |
| Priority date | — |
| Expiry date | Jan 16, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63F2300/6607
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.