(JP9505014-X)      This disc includes a data area and an index area, and a number of objects containing motion video data are recorded in the data area. The index area includes a number of sub-areas, which contain a group of write addresses extracted from a number of the objects recorded in the data area (fig 7A), flags for reproducing them at random, and the number of times of repetition of random reproduction (Fig. 7B).    ADVANTAGE -   Capable of preserving freshness of image content for long time by eliminating routine image reproduction so that it remains attractive for long time.    (US5734788-A)      This disc includes a data area and an index area, and a number of objects containing motion video data are recorded in the data area. The index area includes a number of sub-areas, which contain a group of write addresses extracted from a number of the objects recorded in the data area (fig 7A), flags for reproducing them at random, and the number of times of repetition of random reproduction (Fig. 7B).    ADVANTAGE -   Capable of preserving freshness of image content for long time by eliminating routine image reproduction so that it remains attractive for long time.    (EP788104-B1)      This disc includes a data area and an index area, and a number of objects containing motion video data are recorded in the data area. The index area includes a number of sub-areas, which contain a group of write addresses extracted from a number of the objects recorded in the data area (fig 7A), flags for reproducing them at random, and the number of times of repetition of random reproduction (Fig. 7B).    ADVANTAGE -   Capable of preserving freshness of image content for long time by eliminating routine image reproduction so that it remains attractive for long time.    (JP11007753-A)      NOVELTY - A flag information in an area shows whether a predetermined video objects is reproduced at random or all predetermined video objects are reproduced sequentially. A positional information situated in an index area near the predetermined video object shows the position of the sector of the predetermined video object. DETAILED DESCRIPTION - A volume management area has a positional information showing the position of the sector of an index area. The reproduction control information showing the reproduction order of the predetermined video object is stored in the index area.    USE -   None given.    ADVANTAGE -   Does not cause trouble in reproduction of information in optical disk. Maintains usefulness of video contents and prevents optical disk from becoming obsolete. DESCRIPTION OF DRAWING(S) - The figure shows the external view and the sectional view of the optical disk.    (US6201928-B1)      This disc includes a data area and an index area, and a number of objects containing motion video data are recorded in the data area. The index area includes a number of sub-areas, which contain a group of write addresses extracted from a number of the objects recorded in the data area (fig 7A), flags for reproducing them at random, and the number of times of repetition of random reproduction (Fig. 7B).    ADVANTAGE -   Capable of preserving freshness of image content for long time by eliminating routine image reproduction so that it remains attractive for long time.    (US6229952-B1)      This disc includes a data area and an index area, and a number of objects containing motion video data are recorded in the data area. The index area includes a number of sub-areas, which contain a group of write addresses extracted from a number of the objects recorded in the data area (fig 7A), flags for reproducing them at random, and the number of times of repetition of random reproduction (Fig. 7B).    ADVANTAGE -   Capable of preserving freshness of image content for long time by eliminating routine image reproduction so that it remains attractive for long time.    (CN1164925-A)      This disc includes a data area and an index area, and a number of objects containing motion video data are recorded in the data area. The index area includes a number of sub-areas, which contain a group of write addresses extracted from a number of the objects recorded in the data area (fig 7A), flags for reproducing them at random, and the number of times of repetition of random reproduction (Fig. 7B).    ADVANTAGE -   Capable of preserving freshness of image content for long time by eliminating routine image reproduction so that it remains attractive for long time.