公开(公告)号：JP2001103521A

公开(公告)日：2001-04-13

申请号：JP2000266755

申请日：2000-09-04

Applicant: ST MICROELECTRONICS SRL

Inventor： PAU DANILO ,  LUCA PEZZONI ,  ROVATI FABRIZIO ,  SIRTORI DANIELE

IPC: H04N7/32 ,  H04N7/26 ,  H04N17/00

Abstract: PROBLEM TO BE SOLVED: To provide a technology that detects whether contents of a picture in a video sequence are of a progressive type or an interlace type. SOLUTION: The technology of this invention demarcates a bottom field Bc of a current picture, a top field Tc of the current picture, a bottom field Bp of a preceding picture, and a top field Tp of the preceding picture. Settling whether the current picture decomposed into the fields Bc and Tc is a progressive picture or an interlace picture recognizes whether contents of the video picture are progressive or interlace contents.

公开(公告)号：JP2000125303A

公开(公告)日：2000-04-28

申请号：JP28845599

申请日：1999-10-08

Applicant: ST MICROELECTRONICS SRL

Inventor： LUCA PEZZONI ,  EMILIANO PICCINELLI ,  DANILO POU

IPC: H04N7/32 ,  G06T9/00 ,  H04N7/26

Abstract: PROBLEM TO BE SOLVED: To improve the efficiency of picture compression technology by recognizing the 3:2 pull-down conversion of some film photograms in a sequence of many TV frames, while repeating several pictures and removing redundancy caused by repeating of these pictures. SOLUTION: In a motion estimator, a motion estimation block executes prescribed communication with a block for detecting 3:2 pull-down. The block for detecting 3:2 pull-down has three functional sub-blocks, that is, 1st and 2nd sub-blocks respectively calculates tests (1), (2) for top and bottom fields, and the 3rd subblock controls whether or not these fields are to be repeated in correct order. Thereby a table indicating a repeated pattern of plural fields can be generated to express the position of a picture.