Broadcast supplemental data transmission device and broadcast supplemental data transmission method, and broadcast system
A technology for data transmission devices and broadcasting devices, which is applied in the field of broadcasting systems, can solve the problems of unusable data, unusable data, and unreproducible audio-visual quality, etc., and achieve the effect of low-cost importing devices and reducing business load
Inactive Publication Date: 2013-02-13
NTT DOCOMO INC +1
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- Application Information
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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.
Method used
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[0038] Embodiments of the present invention will be described with reference to the drawings. Where possible, the same reference numerals are assigned to the same parts, and repeated explanations are omitted.
[0039] figure 1 It is a system configuration diagram showing the system configuration of the broadcasting system 10 according to the present embodiment. Such as figure 1 As shown, the broadcast system 10 is composed of a broadcast supplementary data transmission device 100 , a receiving device 200 and a broadcast device 300 .
[0040]The broadcast supplementary data transmission device 100 includes a storage unit 101 , a content DB (content database) 102 , an update time changing unit 103 , an HTTP response unit 104 (receiving means, determining means, sending means), and a communication unit 105 . The broadcast supplementary data transmission device 100 is a server for storing broadcast content data, and distributes the content data in response to a request from the...
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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...
Claims
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IPC IPC(8): H04N21/442H04N21/6375H04N21/6408H04L29/08
CPCH04L29/08792H04N21/44209H04N21/6375H04L67/02H04N21/6408H04L29/06H04H60/11H04L29/0809H04H2201/30H04L67/565H04L67/5651H04N7/173H04H60/07H04H20/16H04H60/12
Inventor 松冈保静山田晓大矢智之中泽宣彦马场昌之
Owner NTT DOCOMO INC