Broadcast supplemental data transmission device and broadcast supplemental data transmission method, and broadcast system

Abstract

Disclosed are a disclosed broadcast supplemental data transmission device, a broadcast supplemental data transmission method, and a broadcasting system which make it possible to maximally reduce communication network traffic when supplementing data missing from broadcasted content data. When a ''GET HTTP / 1.1 If Unmodified Since (time information)'' is received from the receiving device, which is a request to resend missing data including time information, an HTTP response unit determines on the basis of the time information included in said resend request whether or not the content including the missing data has been resent. Then, if the HTTP response unit determines that there the content has been resent, a ''412Precondition Failed'', one of the error messages, is sent as a response to the receiving device, and the content is not transmitted over the communication network.

Description

technical field [0001] The present invention relates to a broadcast supplementary data transmission device, a broadcast supplementary data transmission method, and a broadcast system for interpolating missing data in content data transmitted by broadcast waves. Background technique [0002] In recent years, as a cooperative system of broadcasting and communication, the expansion of the terrestrial digital broadcasting standard, that is, the establishment of the ISDB-Tmm standard is being studied. Among them, the file-casting (File-Casting) function of distributing downloadable content using broadcast waves is also being studied . [0003] In the case of distributing content for download by broadcast waves, depending on the content, if all the data cannot be completely received, it may not be available. For example, data such as software cannot be used as long as a part is missing. [0004] In addition, even if it is moving image or audio data, there is a possibility that i...

AI Technical Summary

Problems solved by technology

[0003] In the case of distributing download content using broadcast waves, depending on the content, if all the data cannot be received completely, it may not be available

For example, if part of data such as software is missing, it cannot be used.

[0004] In addition, even if it is moving image or audio data, there is a possibility that it cannot be reproduced or the audiovisual quality may be significantly lowered due to missing parts.

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