| 摘要 |
Transmission fragment content information transmitted by a content holding device is made redundant. A content holding device comprises a content information storage section (22) for storing hold content information including at least fragment content information obtained by fragmenting a set of content information, an instruction information receiving section (21) for receiving instruction information to instruct the transmission of the fragment content information, a content information constructing section (25) for constructing the transmission fragment content information including the instruction fragment content information which is the fragment content information included in the hold content information and the fragment content information whose transmission is instructed by the instruction information and additional fragment content information which is the fragment content information included in the same hold content information as the instruction fragment content information and fragment content information different from the instruction fragment content information, and a content information transmitting section (26) for transmitting the transmission content information.
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