公开(公告)号：US20020031181A1

公开(公告)日：2002-03-14

申请号：US09976226

申请日：2001-10-12

Applicant: U.S. Philips Corporation

Inventor： Anne-Claude Doux

IPC: H04N007/12

CPC classification number: H04N19/51 ,  H04N19/503

Abstract: In coding a sequence of pictures (P), a motion vector (MV) is established for a block of pixels (B(*,*;n)) in a current picture (P(n)) to be coded. The motion vector (MV) indicates a block of pixels (B(*,*;nnull1)) in a previous picture (P(nnull1)) which is similar to the block of pixels (B(*,*;n)) in the current picture (P(n)) to be coded. Data (D) relating to the block of pixels (B(*,*;n)) in the current picture (P(n)), is compressed (CMP). The extent to which the data (D) is compressed depends on a compression parameter (CP). The compression parameter (CP) is controlled on the basis of the motion vector (MV). Accordingly, data relating to a block of pixels representing a moving object can be compressed to a relatively small extent, whereas data relating to a block of pixels representing a stationary object can be compressed to a relatively large extent. This allows a relatively good picture quality at a decoding end.