1. A method of coding facial animation parameters (FAPs) for synthetic video, comprising: generating a temporal sequence of FAP frames for a synthetic video signal, each said frame representing a time sample of spatially correlated parameters in an n-dimensional space; transforming each said FAP frame from the n-dimensional space into an m-dimensional subspace where m&lt;n to reduce the intra-frame spatial correlation; and coding the temporal sequence of m-dimensional FAP frames into a bitstream.