Abstract: An interface screen used for the correlation between video data and reference picture data includes: a screen 70 for displaying the video data reproduced by a video player; and a screen 73 for displaying a reference picture to be correlated with. When an operator enters an instruction to the operation portion 74 while reproduction video, the data for a reference picture displayed on the screen is correlated with a corresponding reproduction time position of the video data.

Abstract: Desired data can be easily retrieved from material image data associated with video data. For material image data associated with video data, character strings contained in relevant material images are extracted, and keywords input to keyword input parts of a user interface are matched with the extracted characters to retrieve data of the relevant material images. The retrieved material images are changed in size according to their importance before being displayed on a screen.

Abstract: A video playing system, which plays video data divided into a plurality of blocks, includes: a delivery part that delivers video data, a playing part that plays the delivered video data, and a detection part that detects viewing speed of the video data at a start point of a block of interest, at an end point of the block of interest, and at a point between the start point and the end point of the block of interest. When the detected viewing speed satisfies a predetermined condition, information indicating that viewing for the block is completed is generated.

Abstract: A video playing system, which plays video data divided into a plurality of blocks, includes: a delivery part that delivers video data, a playing part that plays the delivered video data, and a detection part that detects viewing speed of the video data at a start point of a block of interest, at an end point of the block of interest, and at a point between the start point and the end point of the block of interest. When the detected viewing speed satisfies a predetermined condition, information indicating that viewing for the block is completed is generated.

Abstract: An image display apparatus has a time base display, a time base division unit and a correspondence display. The time base display displays a time base of the dynamic image information. The time base division unit divides the time base by each scene of the dynamic image information associated with the static image information. The correspondence display displays a range on the time base corresponding to the static image information when the static image information is designated. Thus, the image display apparatus displays the correspondence between dynamic image information and static image information associated with the dynamic image information.

Abstract: An interface screen used for the correlation between video data and reference picture data includes: a screen 70 for displaying the video data reproduced by a video player; and a screen 73 for displaying a reference picture to be correlated with. When an operator enters an instruction to the operation portion 74 while reproduction video, the data for a reference picture displayed on the screen is correlated with a corresponding reproduction time position of the video data.

Abstract: A browse client uses a viewing percentage counter to count the extent to which the user has played back and displayed content video data distributed from a distribution server on a screen, and transmits the extent information to the distribution server. The distribution server keeps track of the received browse extent information in a database in association with the content and the user and also sends the browse extent information to a management client having a setting unit for user registration and a mail unit of preparing electronic mail and transmitting electronic mail to each user for providing management information. The browse client provides the user with a playback button for making it possible to play back the video data starting at the previous stop point using the counted extent information.

Abstract: A distribution server distributes content including video data and slide data reproduced in synchronization with the video data, for a browsing client of a user having permission for browsing the content stored in a distribution server. The content is allowed to edit in accordance with an access of a provider client having a permission for editing the content. The permission for browsing the content and the permission for editing the content are designated by a management client.

Abstract: Static image data of materials used in videoed lectures and the like is presented to browsing users synchronously with video data. As video data is reproduced by a video player of a browsing client, reproduction time positions of the video data are obtained in an image synchronous function part, static image data associated in advance with the reproduction time positions is requested from a delivery server holding the video data and static image data associated with the video data, and the static image data is provided from the delivery server and displayed in an image display part.

Abstract: Desired data can be easily retrieved from material image data associated with video data. For material image data associated with video data, character strings contained in relevant material images are extracted, and keywords input to keyword input parts of a user interface are matched with the extracted characters to retrieve data of the relevant material images. The retrieved material images are changed in size according to their importance before being displayed on a screen.