| 主权项 |
1. A method for providing captioned video playback, comprising:
storing, in a storage unit, a caption signal defining a plurality of caption lines and a video signal defining a plurality of video images in association with a playback timing; selecting, by a caption select unit, one of the plurality of caption lines defined by the caption signal stored in the storage unit; playing back, by a caption playback unit, the caption line selected by the caption select unit; playing back, by a video playback unit, the video signal stored in the storage unit; changing, by a mode changeover unit, between a caption view mode for playing back a caption line selected by the caption select unit and a video image corresponding to the caption line using the caption playback unit and the video playback unit, and a normal view mode for playing back a video image using the video playback unit; providing, by a notifying unit, notification of a remaining time until the play back caption line is switched; and obtaining, by a remaining time display unit includes in a caption changeover unit, a remaining time until changing over displayed caption lines by obtaining a difference between the predetermined time and time counted by a timer unit and displaying the obtained remaining time, and controlling the caption playback unit to change over caption lines when the remaining time becomes zero, wherein the video playback unit includes:
a caption playback timing determining unit which determines said playback timing of said caption line selected by the caption select unit;a video playback start timing determining unit which determines a playback start timing of the video signal corresponding to the playback timing of the caption line determined by the caption playback timing determining unit;a difference calculating unit which acquires a difference between the playback timing of the caption line determined by the caption playback timing determining unit and the video playback start timing determined by the video playback start timing determining unit;a difference determining unit which determines whether the difference acquired by the difference calculating unit is equal to or greater than a predetermined value; anda unit which displays a predetermined image in place of a video image defined by the video signal stored in the storage unit when the difference determining unit determines that the difference is equal to or greater than the predetermined value. |
