Transmission apparatus, metafile transmission method, reception apparatus, and reception processing method

A metafile transmission method, comprising:

• storing, in a memory, first acquisition information used for a first client terminal to acquire a first determined number of data streams of first content that are to be delivered by a delivery server via a network, second acquisition information used for the first client terminal and a second client terminal to acquire a second determined number of data streams of a second content that are to be delivered by the delivery server via the network, a first metafile, and a second metafile,
• wherein the first metafile includes either first presentation control information to control presentation of the first content or first reference information to refer a first file that includes the first presentation control information, and the second metafile includes either second presentation control information to control presentation of the second content or second reference information to refer a second file that includes the second presentation control information,
• wherein the first presentation control information includes first presentation time information that designates a start time at which the first content is to be reproduced, and the second presentation control information includes second presentation time information that designates a start time at which the second content is to be reproduced;
• transmitting, to the first client terminal via the network, the stored first metafile and the stored second metafile based on a first transmission request transmitted from the first client terminal via the network;
• and
• transmitting, to the second client terminal via the network, the stored second metafile based on a second transmission request transmitted from the second client terminal via the network, wherein
• the first client terminal stops reproducing the second content in response to receiving a notification from the second client terminal.

A reception apparatus, comprising:

• processing circuitry configured to
• receive, from the transmission apparatus, a first metafile including first acquisition information and a second acquisition information,
• wherein the first acquisition information is used for the reception apparatus to acquire a first determined number of data streams of first content that are to be delivered by a delivery server via the network, and second acquisition information is used for the reception apparatus and another reception apparatus to acquire a second determined number of data streams of a second content that are to be delivered by the delivery server via the network,
• wherein the first metafile includes either first presentation control information to control presentation of the first content or first reference information to refer a first file that includes the first presentation control information, and includes either second presentation control information to control presentation of the second content or second reference information to refer a second file that includes the second presentation control information,
• wherein the first presentation control information includes first presentation time information that designates a start time at which the first content is to be reproduced, and the second presentation control information includes second presentation time information that designates a start time at which the second content is to be reproduced;
• process reproduction of the first content and reproduction of the second content based on the received first metafile;
• receive a notification from the another reception apparatus;
• and
• stop reproducing at least one of the data streams of the second content in response to receiving the notification from the another reception apparatus.

A reception processing method by a reception apparatus, comprising:

• receiving, from the transmission apparatus, a first metafile including first acquisition information and a second acquisition information,
• wherein the first acquisition information is used for the reception apparatus to acquire a first determined number of data streams of first content that are to be delivered by a delivery server via the network, and second acquisition information is used for the reception apparatus and another reception apparatus to acquire a second determined number of data streams of a second content that are to be delivered by the delivery server via the network,
• wherein the first metafile includes either first presentation control information to control presentation of the first content or first reference information to refer a first file that includes the first presentation control information, and includes either second presentation control information to control presentation of the second content or second reference information to refer a second file that includes the second presentation control information,
• wherein the first presentation control information includes first presentation time information that designates a start time at which the first content is to be reproduced, and the second presentation control information includes second presentation time information that designates a start time at which the second content is to be reproduced;
• processing, using processing circuitry, reproduction of the first content and reproduction of the second content based on the received first metafile;
• receiving a notification from the another reception apparatus;
• and
• stopping reproducing at least one of the data streams of the second content in response to receiving the notification from the another reception apparatus.