CA2329315A1 - Systeme de brouillage multimedia adaptatif (mass) - Google Patents
Systeme de brouillage multimedia adaptatif (mass) Download PDFInfo
- Publication number
- CA2329315A1 CA2329315A1 CA002329315A CA2329315A CA2329315A1 CA 2329315 A1 CA2329315 A1 CA 2329315A1 CA 002329315 A CA002329315 A CA 002329315A CA 2329315 A CA2329315 A CA 2329315A CA 2329315 A1 CA2329315 A1 CA 2329315A1
- Authority
- CA
- Canada
- Prior art keywords
- samples
- sample
- scrambled
- scrambling
- lsbs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
- H04L9/065—Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems, RC4, SEAL or A5/3
- H04L9/0656—Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving video stream encryption
- H04N21/23476—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving video stream encryption by partially encrypting, e.g. encrypting the ending portion of a movie
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video stream decryption
- H04N21/44055—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video stream decryption by partially decrypting, e.g. decrypting a video stream that has been partially encrypted
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/633—Control signals issued by server directed to the network components or client
- H04N21/6332—Control signals issued by server directed to the network components or client directed to client
- H04N21/6334—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key
- H04N21/63345—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key by transmitting keys
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
- H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
- H04L2209/60—Digital content management, e.g. content distribution
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
L'invention concerne un système (300, 500) permettant de brouiller des échantillons numériques (115, 200, 250, 260, 270) de données multimédia, notamment des échantillons de données audio et vidéo, de sorte que le contenu desdits échantillons se dégrade mais reste reconnaissable, ou se présente à un niveau de qualité souhaité. Les échantillons peuvent se présenter sous n'importe quel format numérique comprimé ou non, y compris les échantillons à modulation par codage d'impulsions (PCM), les échantillons en représentation en virgule flottante, les échantillons de programme de compression-extension (par exemple µ-law et A-law), et d'autres trains binaires comprimés. Le niveau de qualité peut être associé, avec un signal particulier, à un certain rapport signal/bruit, ou être défini par des contrôles objectifs et/ou subjectifs, par exemple. Plusieurs bits de plus faible poids (LSB) peuvent être brouillés dans des trames successives (TRAME A, TRAME B, TRAME C), les paramètres de brouillage pouvant changer de trame à trame. La clé de brouillage (310) est par ailleurs entièrement ou partiellement incorporée (340) aux données brouillées, puis récupérée au niveau d'un décodeur (400, 600) destiné à être utilisé pour le désembrouillage. Après ce désembrouillage, la clé de brouillage ne peut plus être récupérée, étant elle-même brouillée par le désembrouilleur.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US8248898P | 1998-04-21 | 1998-04-21 | |
US60/082,488 | 1998-04-21 | ||
PCT/US1999/008635 WO1999055089A1 (fr) | 1998-04-21 | 1999-04-20 | Systeme de brouillage multimedia adaptatif (mass) |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2329315A1 true CA2329315A1 (fr) | 1999-10-28 |
Family
ID=22171545
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002329315A Abandoned CA2329315A1 (fr) | 1998-04-21 | 1999-04-20 | Systeme de brouillage multimedia adaptatif (mass) |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1095517A1 (fr) |
JP (1) | JP2002512494A (fr) |
KR (1) | KR20010034802A (fr) |
CN (1) | CN1151673C (fr) |
AU (1) | AU3752599A (fr) |
CA (1) | CA2329315A1 (fr) |
MX (1) | MXPA00010337A (fr) |
WO (1) | WO1999055089A1 (fr) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7177429B2 (en) | 2000-12-07 | 2007-02-13 | Blue Spike, Inc. | System and methods for permitting open access to data objects and for securing data within the data objects |
US6760442B1 (en) * | 1998-12-18 | 2004-07-06 | Sun Microsystems, Inc. | Method and apparatus for adjusting the quality of digital media |
WO2000052923A1 (fr) * | 1999-03-02 | 2000-09-08 | Koninklijke Philips Electronics N.V. | Procede et dispositif de brouillage et de desembrouillage d'information |
US7664264B2 (en) | 1999-03-24 | 2010-02-16 | Blue Spike, Inc. | Utilizing data reduction in steganographic and cryptographic systems |
JP4110690B2 (ja) * | 1999-10-18 | 2008-07-02 | ヤマハ株式会社 | データ生成方法、記録装置、記録媒体、および再生装置 |
EP1410140B1 (fr) * | 2001-03-28 | 2017-02-15 | NDS Limited | Systeme et procede de gestion de droits numeriques |
CN1274153C (zh) * | 2001-04-18 | 2006-09-06 | 皇家菲利浦电子有限公司 | 部分加密的声频编码 |
US7287275B2 (en) | 2002-04-17 | 2007-10-23 | Moskowitz Scott A | Methods, systems and devices for packet watermarking and efficient provisioning of bandwidth |
US7752446B2 (en) | 2002-05-15 | 2010-07-06 | International Business Machines Corporation | System and method for digital watermarking of data repository |
US7630492B2 (en) | 2002-10-03 | 2009-12-08 | Daniel Lecomte | Secure audio stream scramble system |
FR2845543B1 (fr) * | 2002-10-03 | 2005-02-04 | Medialive | Systeme d'embrouillage securise de flux audio |
GB2400285A (en) * | 2003-03-31 | 2004-10-06 | Sony Uk Ltd | Digital audio processing |
FR2875658B1 (fr) * | 2004-09-21 | 2007-03-02 | Commissariat Energie Atomique | Estimation du rapport signal a interference plus bruit en sortie d'un recepteur ofdm-cdma. |
US20070083467A1 (en) * | 2005-10-10 | 2007-04-12 | Apple Computer, Inc. | Partial encryption techniques for media data |
US8055903B2 (en) * | 2007-02-15 | 2011-11-08 | Avaya Inc. | Signal watermarking in the presence of encryption |
WO2009001139A1 (fr) * | 2007-06-28 | 2008-12-31 | Taptu Ltd | Vignette audio |
CN102156734B (zh) * | 2011-04-12 | 2013-05-29 | 西南科技大学 | 一种基于语义隐藏标引的视频内容管理方法 |
CN115695675B (zh) * | 2023-01-03 | 2023-03-10 | 北京特立信电子技术股份有限公司 | 用于网络数据安全交换的视频加密方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3784743A (en) * | 1972-08-23 | 1974-01-08 | Bell Telephone Labor Inc | Parallel data scrambler |
US5185794A (en) * | 1990-08-06 | 1993-02-09 | Nec Home Electronics, Ltd. | System and method for scrambling and/or descrambling a video signal |
JPH0730855A (ja) * | 1993-07-08 | 1995-01-31 | Sony Corp | ビデオデータの記録方法 |
-
1999
- 1999-04-20 JP JP2000545321A patent/JP2002512494A/ja active Pending
- 1999-04-20 EP EP99919913A patent/EP1095517A1/fr not_active Withdrawn
- 1999-04-20 KR KR1020007011703A patent/KR20010034802A/ko not_active Application Discontinuation
- 1999-04-20 MX MXPA00010337A patent/MXPA00010337A/es unknown
- 1999-04-20 AU AU37525/99A patent/AU3752599A/en not_active Abandoned
- 1999-04-20 WO PCT/US1999/008635 patent/WO1999055089A1/fr not_active Application Discontinuation
- 1999-04-20 CN CNB998063851A patent/CN1151673C/zh not_active Expired - Fee Related
- 1999-04-20 CA CA002329315A patent/CA2329315A1/fr not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
JP2002512494A (ja) | 2002-04-23 |
AU3752599A (en) | 1999-11-08 |
MXPA00010337A (es) | 2003-05-19 |
KR20010034802A (ko) | 2001-04-25 |
WO1999055089A1 (fr) | 1999-10-28 |
CN1151673C (zh) | 2004-05-26 |
CN1301460A (zh) | 2001-06-27 |
EP1095517A1 (fr) | 2001-05-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FZDE | Discontinued | ||
FZDE | Discontinued |
Effective date: 20030422 |