Video playback apparatus and method
A video playback apparatus includes a data-storage unit storing video data and a first video-time stamp, an information-storage unit storing first-associated information and a first-associated-time stamp, a unit acquiring plural playback-video data and plural second-video-time stamps of the plural playback-video data from the data-storage unit, and acquiring second-associated information of the playback-video data and a second-associated-time stamp of the second-associated information from the information-storage unit, a unit measuring information amounts of the playback-video data of the second-video-time stamps to obtain a smallest information amount of the information amounts, a unit detecting a time-stamp section corresponding to the smallest information amount, a unit changing the second-associated-time stamp to generate a changed time stamp, the second-associated information being presented in the time-stamp section by the changed time stamp, and a unit presenting the second-associated information together with the playback-video data based on the changed time stamp.
1. A video playback apparatus comprising:
a data storage unit configured to store video data and a first video time stamp which corresponds to a playback time to play back the video data;
an information storage unit configured to store first associated information and a first associated time stamp, the first associated information being related to the video data, and the first associated time stamp corresponding to a playback time to play back the first associated information;
a data acquisition unit configured to acquire plural playback video data to be played back and plural second video time stamps of the plural playback video data from the data storage unit on the basis of the stored video data and the first video time stamp, and acquire second associated information of the playback video data and a second associated time stamp of the second associated information from the information storage unit on the basis of the first associated information and the first associated time stamp;
a decision unit configured to decide to present the second associated information by at least one of text and voice; and
a presentation unit configured to present the playback video data and the second associated information on the basis of the second associated time stamp and the second video time stamps, wherein
the decision unit includes a measurement unit configured to measure a magnitude of movement of video of the playback video data, and
the decision unit decides to present the second associated information by voice when the magnitude is not less than a threshold value and to present the second associated information by text when the magnitude is less than the threshold value.
2. A video playback apparatus comprising:
a data storage unit configured to store video data and a first video time stamp which corresponds to a playback time to play back the video data;
an information storage unit configured to store first associated information and a first associated time stamp, the first associated information being related to the video data, and the first associated time stamp corresponding to a playback time to play back the first associated information;
a data acquisition unit configured to acquire plural playback video data to be played back and plural second video time stamps of the plural playback video data from the data storage unit on the basis of the stored video data and the first video time stamp, and acquire second associated information of the playback video data and a second associated time stamp of the second associated information from the information storage unit on the basis of the first associated information and the first associated time stamp;
a decision unit configured to decide to present the second associated information by at least one of text and voice; and
a presentation unit configured to present the playback video data and the second associated information on the basis of the second associated time stamp and the second video time stamps, wherein
the decision unit includes a character overlay measurement unit configured to measure a character overlay presentation time per unit time in video of the playback video data, and
the decision unit decides to present the second associated information by voice when the character overlay presentation time per unit time is not less than a threshold value and to present the second associated information by text when the character overlay presentation time per unit time is less than the threshold value.
3. A video playback apparatus comprising:
a data storage unit configured to store video data and a first video time stamp which corresponds to a playback time to play back the video data;
an information storage unit configured to store first associated information and a first associated time stamp, the first associated information being related to the video data, and the first associated time stamp corresponding to a playback time to play back the first associated information;
a data acquisition unit configured to acquire plural playback video data to be played back and plural second video time stamps of the plural playback video data from the data storage unit on the basis of the stored video data and the first video time stamp, and acquire second associated information of the playback video data and a second associated time stamp of the second associated information from the information storage unit on the basis of the first associated information and the first associated time stamp;
a decision unit configured to decide to present the second associated information by at least one of text and voice; and
a presentation unit configured to present the playback video data and the second associated information on the basis of the second associated time stamp and the second video time stamps, wherein
the decision unit includes a voice measurement unit configured to measure an output time of one of voice and sound per unit time in video of the playback video data, and
the decision unit decides to present the second associated information by text when the output time is not less than a threshold value and to present the second associated information by one of voice and sound when the output time is less than the threshold value.
4. A video playback method comprising:
storing in a data storage unit video data and a first video time stamp which corresponds to a playback time to play back the video data;
storing in an information storage unit first associated information and a first associated time stamp, the first associated information being related to the video data, and the first associated time stamp corresponding to a playback time to play back the first associated information;
acquiring plural playback video data to be played back and plural second video time stamps of the plural playback video data from the data storage unit on the basis of the stored video data and the first video time stamp, and acquire second associated information of the playback video data and a second associated time stamp of the second associated information from the information storage unit on the basis of the first associated information and the first associated time stamp;
deciding to present the second associated information by at least one of text and voice; and
presenting the playback video data and the second associated information on the basis of the second associated time stamp and the second video time stamps, wherein
deciding to present the second associated information includes measuring a magnitude of movement of video of the playback video data, and
deciding to present the second associated information decides to present the second associated information by voice when the magnitude is not less than a threshold value and to present the second associated information by text when the magnitude is less than the threshold value.
5. A video playback method comprising:
storing in a data storage unit video data and a first video time stamp which corresponds to a playback time to play back the video data;
storing in an information storage unit first associated information and a first associated time stamp, the first associated information being related to the video data, and the first associated time stamp corresponding to a playback time to play back the first associated information;
acquiring plural playback video data to be played back and plural second video time stamps of the plural playback video data from the data storage unit on the basis of the stored video data and the first video time stamp, and acquire second associated information of the playback video data and a second associated time stamp of the second associated information from the information storage unit on the basis of the first associated information and the first associated time stamp;
deciding to present the second associated information by at least one of text and voice; and
presenting the playback video data and the second associated information on the basis of the second associated time stamp and the second video time stamps, wherein
deciding to present the second associated information includes measuring a character overlay presentation time per unit time in video of the playback video data, and
deciding to present the second associated information decides to present the second associated information by voice when the character overlay presentation time per unit time is not less than a threshold value and to present the second associated information by text when the character overlay presentation time per unit time is less than the threshold value.
6. A video playback method comprising:
storing in a data storage unit video data and a first video time stamp which corresponds to a playback time to play back the video data;
storing in an information storage unit first associated information and a first associated time stamp, the first associated information being related to the video data, and the first associated time stamp corresponding to a playback time to play back the first associated information;
acquiring plural playback video data to be played back and plural second video time stamps of the plural playback video data from the data storage unit on the basis of the stored video data and the first video time stamp, and acquire second associated information of the playback video data and a second associated time stamp of the second associated information from the information storage unit on the basis of the first associated information and the first associated time stamp;
deciding to present the second associated information by at least one of text and voice; and
presenting the playback video data and the second associated information on the basis of the second associated time stamp and the second video time stamps, wherein
deciding to present the second associated information includes measuring an output time of one of voice and sound per unit time in video of the playback video data, and
deciding to present the second associated information decides to present the second associated information by text when the output time is not less than a threshold value and to present the second associated information by one of voice and sound when the output time is less than the threshold value.