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Paper Abstract and Keywords
Presentation 2005-03-11 15:40
Study of Efficient Content Distribution for Synchronous Playback on Multiple Clients
Keiichi Hirota, Noburou Taniguchi, Kazuo Mogi, Osamu Shionoiri (NTT), Noboru Sonehara (NII), Masao Kasahara (Osaka Gakuin Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) Some kinds of contents require synchronous playback on multiple clients at various locations.There have been known some content distribution methods, but they are not good enough for such purpose.Streaming needs a lot of facility costs and is constrained by bandwidth of user's line capability.On the other hand, distribution by download or package is difficult to restrict playtime technically.
In this paper, we propose an efficient content distribution for synchronous playback on multiple client using "K-method", which enables indivisualization of each devices and efficient multicasting of contents. Our proposal distributes scrambled contents as a package and then distributes header which involves descramble key of scrambled contens.
We also discuss traitor tracing which spreads descrambled contents.
Keyword (in Japanese) (See Japanese page) 
(in English) K-method / rights management / synchronous playback / restrict playtime / traitor tracing / / /  
Reference Info. IEICE Tech. Rep., vol. 104, March 2005.
Paper #  
Date of Issue 2005-03-04 (OIS) 
ISSN Print edition: ISSN 0913-5685
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Conference Information
Committee LOIS  
Conference Date 2005-03-11 - 2005-03-11 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To LOIS 
Conference Code 2005-03-OIS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study of Efficient Content Distribution for Synchronous Playback on Multiple Clients 
Sub Title (in English)  
Keyword(1) K-method  
Keyword(2) rights management  
Keyword(3) synchronous playback  
Keyword(4) restrict playtime  
Keyword(5) traitor tracing  
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1st Author's Name Keiichi Hirota  
1st Author's Affiliation NTT Cyber Space Laboratories (NTT)
2nd Author's Name Noburou Taniguchi  
2nd Author's Affiliation NTT Information Shring Platform Laboratories (NTT)
3rd Author's Name Kazuo Mogi  
3rd Author's Affiliation NTT Cyber Space Laboratories (NTT)
4th Author's Name Osamu Shionoiri  
4th Author's Affiliation NTT Information Shring Platform Laboratories (NTT)
5th Author's Name Noboru Sonehara  
5th Author's Affiliation National Institute of Informatics (NII)
6th Author's Name Masao Kasahara  
6th Author's Affiliation Osaka Gakuin University (Osaka Gakuin Univ.)
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Speaker Author-1 
Date Time 2005-03-11 15:40:00 
Presentation Time 25 minutes 
Registration for LOIS 
Paper # OIS2004-107 
Volume (vol) vol.104 
Number (no) no.714 
Page pp.71-76 
#Pages 6 
Date of Issue 2005-03-04 (OIS) 

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