METHOD FOR SWITCHING FROM FIRST DIGITAL AUDIO-VISUAL PROGRAMME VIDEO COMPONENT(S) TO A SECOND DIGITAL AUDIO-VISUAL PROGRAMME VIDEO COMPONENT(S) USING FIELD DUPLICATION

摘要

First digital audio-visual program video component(s) are switched on a second digital audio-visual program video component(s) by switching on the beginning of the first set of images including an Intra-coded picture of the second program video component encountered after the switching command. In the transmission order of images, each bidirectionally predictive-coded picture of the first set of images referring to the set of images pertaining to the set of images preceding it before switching, is substituted for a bidirectionally predictive-coded picture of the video coding which is produced independently of (1) the substituted image content and (2) the contents of the images to which it refers.