On the basis of encoding condition and encoding difficulty parameter of material inputted at steps S31, S32, stability of pull-down pattern is calculated at step S33. The stability of the pull-down pattern is judged at step S34. In the case where the pull-down pattern is not stable, warning is displayed...http://www.google.ca/patents/US6275528?utm_source=gb-gplus-sharePatent US6275528 - Picture encoding method and picture encoding apparatus
