Stage for detecting movement in digital signals corresponding to initial images with interlaced frames, and coding device including such a stage

摘要

Stage for detecting movement in digital signals corresponding to initial images with interlaced frames, comprising a format conversion circuit and, in parallel with the output of the said circuit, first and second filtering channels, as well as a comparator of the output signals from the said first and second filtering channels, this stage being usable particularly in a coding device comprising, on the one hand a coding channel (101) and an associated prediction channel (102), and, on the other hand, a subassembly (103) for de-interlacing of the blocks subdividing the images. This subassembly (103) itself comprises a movement detection stage (210) and a switching stage (221, 222, 223, 224, 231, 232, 233, 234) provided in order to allow de-interlacing of the blocks in the coding channel (101) and, correspondingly in the associated prediction channel (102), re-interlacing of the blocks. Application: television signal coders in accordance with the ISO-MPEG standard. IMAGE