Methods, devices, and computer programs for streaming partitioned timed media data

A device for generating description data used by a client to request one or more video segments which are obtained by temporal dividing of video data, the device comprising:

• one or more processors, and
• memory storing one or more programs configured to be executed by the one or more processors, the one or more programs including instructions for:
• identifying required data that is required to reproduce at least a part the video data, and
• generating the description data including:
• i) first request information used by the client to request the required data,
• ii) second request information used by the client to selectively request at least one of video segments which are referred by the required data, and
• iii) reference information indicating that the video segments are referred by the required data.

A computer-readable storage medium storing a program for causing a computer to execute a generation method of description data used by a client to request one or more video segments which are obtained by temporal dividing of video data, the method comprising:

• identifying required data that is required to reproduce at least a part the video data, and
• generating the description data including
• i) first request information used by the client to request the required data,
• ii) second request information used by the client to selectively request at least one of video segments which are referred by the required data, and
• iii) reference information indicating that the video segments are referred by the required data.