Rate Distortion Theory for Image and Video Coding

Wegive the rate distortion function for three image sequence coders: intra-frame, interframe and motion compensating inter-frame. The intensity function distribution is assumed to be Gaussian, and we suppose spatio-temporal separability and an isotropic model for the spatial part of the intensity function. Wegivequantitative results justifing the use of the above three coding modes in an image sequence coder. Moreover the obtained results showthatthe hybrid coding (motion compensating prediction + spatial compression) is more interesting as motion analysis becomes more effective