An algorithm based on a pre-analysis implements an efficient constant bit-rate control with a reduced requirement on a buffer memory capacity. The pre-analysis is on at least one slice (GOS) of the current whole picture, and/or on a mix of information on the pre-analysis of a slice of the preceding picture...http://www.google.de/patents/US6215820?utm_source=gb-gplus-sharePatent US6215820 - Constant bit-rate control in a video coder by way of pre-analysis of a slice of the pictures