A new method for the characterization of telecine effect in video sequences

摘要

A great deal of the audio–visual content used for broadcasting and automatic video indexing comes from film. This film content has to undergo a conversion of its frame rate, from 24fps, the characteristic frame rate of film recording, to 25fps or 30fps which are the frame rates used in TV broadcasting. This conversion is carried out by a telecine and consists of a periodic repetition of fields. In many applications the need arises to reverse this conversion (inverse telecine). This paper presents a statistical method for automatic removal of the repeated fields present in the video sequence. The method consists of two steps: the first is to determine, using an energy detector, if the sequence has been telecined. Then, the two parameters necessary for removing the telecine effect are determined: the system for which the film has been telecined (for NTSC or PAL system) and the location of one repeated field.