However, the MPEG standards do not specify how layers should be created, as the focus in these standards is on the behavior of the decoder. The encoder analyzes the incoming frames and estimates the parameters of 3 D motion and deformation for all objects in the scene. Motion and deformation of other objects are parameterized similarly.
All parameters are entropy encoded and transmitted through the channel.
The information from the 3 D models and the facial expression synthesis are incorporated into the parameter estimation. These schemes utilize the statistics of the video signal without knowledge of the semantic content of the frames and can therefore be used for arbitrary scenes. SNHC allows the transmission of a 3 D face model that can be animated to generate di erent facial expressions. These schemes utilize the statistics of the video signal without knowledge of the semantic content of the frames and can therefore be used for arbitrary scenes. SNHC allows the transmission of a 3 D face model that can be animated to generate different facial expressions.