Patent ID: 6266478
Filing Date: 2001-07-24
Classification: G09B,G11B,H04N

Abstract:
An information record medium, from which record information is reproduced by an information reproducing apparatus, comprising:a plurality of navigation packs, each comprising data search information including address information that indicates a location on the information record medium of information which is to be reproduced, each of the plurality of navigation packs further comprising presentation control information;a plurality of sub picture packs, each comprising a header and sub picture information; anda plurality of video packs, each comprising a header and video information,wherein the plurality of navigation packs, the plurality of sub picture packs and the plurality of video packs are multiplexed, thereby constituting a plurality of data units,wherein each video pack included in one data unit is configured to produce a main video image through the information reproducing apparatus,wherein each sub picture pack included in one data unit is configured to superimpose a corresponding sub picture image on the main video image through the information reproducing apparatus for a time period defined by a first temporal resolution, andwherein the presentation control information in the navigation pack includes highlight information for highlighting at least one portion of the sub picture image displayed by the information reproducing apparatus, and the highlight information includes time management information indicating a start time and an end time of highlighting the at least one portion of the sub picture image, the start time and the end time each having a second temporal resolution that is greater than the first temporal resolution of the time period during which the sub picture is displayed, thereby enabling a fine temporal control on the highlighting of the sub picture image.