CA2408232C - Procede et appareil permettant l'acces aleatoire a des images individuelles dans un flot de video chiffre - Google Patents

Procede et appareil permettant l'acces aleatoire a des images individuelles dans un flot de video chiffre Download PDF

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Publication number
CA2408232C
CA2408232C CA002408232A CA2408232A CA2408232C CA 2408232 C CA2408232 C CA 2408232C CA 002408232 A CA002408232 A CA 002408232A CA 2408232 A CA2408232 A CA 2408232A CA 2408232 C CA2408232 C CA 2408232C
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CA
Canada
Prior art keywords
transport packets
data
type
transport
packets
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.)
Expired - Fee Related
Application number
CA002408232A
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English (en)
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CA2408232A1 (fr
Inventor
Nicol Chung Pang So
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arris Technology Inc
Original Assignee
General Instrument Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by General Instrument Corp filed Critical General Instrument Corp
Publication of CA2408232A1 publication Critical patent/CA2408232A1/fr
Application granted granted Critical
Publication of CA2408232C publication Critical patent/CA2408232C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2389—Multiplex stream processing, e.g. multiplex stream encrypting
    • H04N21/23895—Multiplex stream processing, e.g. multiplex stream encrypting involving multiplex stream encryption
    • H04N21/23897—Multiplex stream processing, e.g. multiplex stream encrypting involving multiplex stream encryption by partially encrypting, e.g. encrypting only 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]
    • H04N21/20—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, manipulating MPEG-4 scene graphs
    • H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption
    • 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
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2387—Stream processing in response to a playback request from an end-user, e.g. for trick-play
    • 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
    • H04N21/47—End-user applications
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
    • 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
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications
    • H04N7/17318—Direct or substantially direct transmission and handling of requests
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications
    • H04N7/17336—Handling of requests in head-ends

Abstract

La présente invention concerne un système permettant l'accès conditionnel à des données paquetisées d'images (vidéo), audio ou autres. Le système chiffre de manière sélective les données paquetisées (105) de sorte que les paquets de transport (130, 150) qui comprennent des données d'en-tête (131, 151) sont décryptés, tandis que tous les autres paquets de transport (140, 141) qui ne comportent pas de données d'en-tête sont cryptés. Cela permet l'accès direct aux paquets de transport comportant les données d'en-tête (130, 150) à partir d'une mémoire (230, 310), ce qui constitue un avantage pour effectuer des contrôles de mouvement, tels que d'avance rapide ou de retour rapide, par exemple, dans un service de vidéo à la demande. Lorsque les paquets de transport on été cryptés de manière sélective et mémorisés, on peut avoir l'accès aux bits de brouillage et de commande (132, 142, 152) pour chaque paquet (130, 140, 150) en vue de déterminer si le paquet est crypté, et par conséquent si le paquet comporte des données d'en-tête. Si un paquet comporte des données d'en-tête, on peut l'utiliser dans un mode de contrôle de commande étant donné qu'il fournit des données depuis le début d'un paquet de données vidéo, audio ou autres.
CA002408232A 2000-05-02 2000-05-02 Procede et appareil permettant l'acces aleatoire a des images individuelles dans un flot de video chiffre Expired - Fee Related CA2408232C (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2000/011891 WO2002015579A1 (fr) 2000-05-02 2000-05-02 Procede et appareil permettant l'acces aleatoire a des images individuelles dans un flot de video chiffre

Publications (2)

Publication Number Publication Date
CA2408232A1 CA2408232A1 (fr) 2002-02-21
CA2408232C true CA2408232C (fr) 2008-01-15

Family

ID=21741343

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002408232A Expired - Fee Related CA2408232C (fr) 2000-05-02 2000-05-02 Procede et appareil permettant l'acces aleatoire a des images individuelles dans un flot de video chiffre

Country Status (6)

Country Link
EP (1) EP1275250A1 (fr)
KR (1) KR20020091254A (fr)
CN (1) CN1452840A (fr)
AU (1) AU2000248144A1 (fr)
CA (1) CA2408232C (fr)
WO (1) WO2002015579A1 (fr)

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IL162470A0 (en) 2002-02-22 2005-11-20 Nds Ltd Scrambled packet stream processing
AU2003237462A1 (en) * 2002-06-07 2003-12-22 General Instrument Corporation Seamless switching between multiple pre-encrypted video files
EP1540955A4 (fr) * 2002-07-09 2007-08-01 Kaleidescape Inc Systeme de distribution de contenu et de cle pour contenu numerique representant des flots multimedia
CN1260642C (zh) * 2002-11-18 2006-06-21 深圳市朗科科技有限公司 一种向移动存储装置发送命令和数据的方法
FR2848372B1 (fr) * 2002-12-09 2005-04-01 Medialive Synchronisation de flux audiovisuels securises
WO2004057830A1 (fr) * 2002-12-20 2004-07-08 Koninklijke Philips Electronics N.V. Appareil et procede de traitement de trains de donnees continus
EP1616401A4 (fr) * 2003-04-21 2012-01-04 Rgb Networks Inc Systeme de chiffrement de programmes multiples multiplexes dans le temps
GB2404467A (en) 2003-07-31 2005-02-02 Sony Uk Ltd Access control for digital content
US7343013B2 (en) * 2003-12-16 2008-03-11 Sony Corporation Composite session-based encryption of video on demand content
JP2005149029A (ja) * 2003-11-13 2005-06-09 Matsushita Electric Ind Co Ltd コンテンツ配信システム、コンテンツサーバ、コンテンツ受信装置、コンテンツ配信方法、プログラム及び記録媒体
KR101244308B1 (ko) * 2003-12-08 2013-03-18 삼성전자주식회사 동영상 파일의 암호화 방법 및 그를 이용한 디지털 저작권관리방법
CN100364332C (zh) 2004-09-01 2008-01-23 华为技术有限公司 一种保护宽带视音频广播内容的方法
BRPI0517365B1 (pt) * 2004-09-23 2019-12-17 Interdigital Madison Patent Holdings inserção de metadados para controle de reprodução em fluxo de transporte de vídeo
CN100505866C (zh) * 2004-10-28 2009-06-24 武汉大学 一种视频信息的加解密方法
US7991997B2 (en) 2005-06-23 2011-08-02 Panasonic Avionics Corporation System and method for providing searchable data transport stream encryption
US7646867B2 (en) * 2005-09-09 2010-01-12 Netapp, Inc. System and/or method for encrypting data
CN101079871B (zh) * 2006-09-29 2011-05-11 腾讯科技（深圳）有限公司 多媒体信息流的透传方法和系统
US7929698B2 (en) 2007-06-15 2011-04-19 Sony Corporation Selective encryption to enable trick play with enhanced security
CN101453653B (zh) * 2007-12-07 2011-01-05 中兴通讯股份有限公司 一种传播数字音视频参数集的方法
ES2506095T7 (es) 2008-05-29 2018-04-16 Hewlett-Packard Development Company, L.P. Componente reemplazable de impresora que incluye una memoria que almacena una máscara de cifrado de etiquetas
US20100132007A1 (en) 2008-11-25 2010-05-27 Cisco Technology, Inc. Accelerating channel change time with external picture property markings
CN101783789B (zh) * 2009-01-16 2013-01-02 深圳市维信联合科技有限公司 网络数据包传输处理方法、设备及系统
US8630412B2 (en) 2010-08-25 2014-01-14 Motorola Mobility Llc Transport of partially encrypted media
KR101362429B1 (ko) * 2011-07-25 2014-02-13 주식회사 케이티 영상 콘텐츠 품질 측정 시스템 및 방법
CN102867153B (zh) * 2012-08-30 2014-04-09 腾讯科技（深圳）有限公司 一种加密、解密视频文件的方法、装置及移动终端
RU2652091C2 (ru) 2013-06-21 2018-04-25 Сони Корпорейшн Устройство и способ передачи, устройство воспроизведения, способ воспроизведения и устройство приема
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Also Published As

Publication number Publication date
AU2000248144A1 (en) 2002-02-25
WO2002015579A1 (fr) 2002-02-21
EP1275250A1 (fr) 2003-01-15
CA2408232A1 (fr) 2002-02-21
KR20020091254A (ko) 2002-12-05
CN1452840A (zh) 2003-10-29

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Effective date: 20160502

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