WO2005060415A2 - Composite session-based encryption of video on demand content - Google Patents
Composite session-based encryption of video on demand content Download PDFInfo
- Publication number
- WO2005060415A2 WO2005060415A2 PCT/US2004/034091 US2004034091W WO2005060415A2 WO 2005060415 A2 WO2005060415 A2 WO 2005060415A2 US 2004034091 W US2004034091 W US 2004034091W WO 2005060415 A2 WO2005060415 A2 WO 2005060415A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- portions
- encryption
- content
- vod
- decryption
- Prior art date
Links
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
- H04N21/234—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
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
- H04N7/163—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing by receiver means only
-
- 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
- H04N21/23473—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption by pre-encrypting
-
- 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]
- H04N21/40—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
Definitions
- RAM Random Access Memory
- RAID Redundant Array of Independent Disks
- the headend and network can utilize fewer legacy encryption devices 116 resulting in reduced capital expenditures and reduced hardware requirements.
- the session manager 26 provisions the alternate CA system 112 to carry out the encryption processing of the stream.
- Alternate CA system 112 thus provisions the alternate encryption device to encrypt packets bearing the PIDs of the "critical" packets.
- the "critical" packets as well as the "non- critical" packets are routed through routing matrix 120 along path 134 to routing matrix 124 to add/drop re-multiplexer 128 to the alternate encryption device 132.
- the retimed stream from the add/drop re-multiplexer 128 is then selectively encrypted (or fully encrypted) at the alternate encryption device 132 before being routed via edge resources 46 to the subscriber terminal 50.
- edge resources 46 is shown to incorporate QAM and RF functions. However, in many configurations, the edge resources may also incorporate any or all of the alternate encryption device 132, the add/drop re-multiplexer 128 and possibly even the routing matrix 124.
- At least one computer readable storage device is incorporated and a processor that: stores the first and second portions in the at least one computer readable storage device; receives a request for delivery of the content, the request being from a terminal having decryption capabilities associated with either a first decryption method or a second decryption method; and determines if the request is from a terminal having decryption capabilities associated with a first decryption method or a second decryption method. If the request is from a terminal having decryption capabilities associated with the first decryption method, then a routing arrangement routes the first portions to a first encryption device and routes the second portions around the first encryption device.
- the content is stored on the VOD server 22 with "critical" packets identified, e.g., using a new PID.
- a request is received for content from a subscriber terminal 50 at 212
- a determination is made as to the decryption capability of the subscriber terminal 50 (e.g., STB) at 216. If the subscriber terminal is enabled for a first encryption system (e.g., a legacy encryption - system) at 216, control passes to 222 where "critical" packets are routed to a CAl enabled encryption device (116) for encryption of the selected packets.
- “Non-critical" packets are routed around the CAl enabled encryption device 116 at 226.
- the process involves routing the first portions to a first encryption device; routing the second portions around the first encryption device; encrypting the first portions using a first encryption process at the first encryption device to produce encrypted first portions; and assembling a stream of selectively encrypted content from the encrypted first portions and the second portions.
- the process involves assembling a stream of content from the first portion and the second portion; routing the stream to a second encryption device; and encrypting the first portions using a second encryption process at the second encryption device to produce a selectively encrypted stream.
- the storage requirement and complexity of the session playback are reduced since the routing decisions around the legacy encryption device(s) can optionally be eliminated.
- This arrangement also eliminates the need for the add drop multiplexer and the remapping of PIDs to reconstitute a full transport stream.
- the negative aspect of this version of the topology is additional legacy encryption equipment since the full transport multiplex for each legacy session is passed through the legacy encryption device.
- many more (perhaps ten to fifty times more) legacy encryption devices are used to provide the same level of service than the system ; described above.
- the edge devices which may contain add/drop multiplex, second CA encryption and QAM modulator elements, is configured by the session manager 26 to remap the segregated "critical" content and "non-critical" data back to a single, common PID. If the "critical" content is stored in a separate file on the VOD server 22, then the two files representing the entire content is streamed. In this case, routing matrix 120 is also tasked to send the "non-critical" content around the legacy encryption device via path 134, thus freeing bandwidth from the encrypter so that roughly a 10 to 50 fold improvement in session capacity can be realized on a single encryption device. The bypass stream is recovered as part of the functions of routing matrix 124.
- the "non-critical" and encrypted “critical” content streams are still recombined into a single stream at the add/drop re-multiplexer 128, which may be incorporated into the edge device.
- the session manager 26 initiates the encryption of the session via the alternative conditional access system 112, which in turn provisions the alternate CA encryption device 132.
- the alternative CA system is commanded to process all the PIDs on the original transport PID, which initially carries only the "non-critical" content.
- the session manager 26 configures the routing matrix 120 and 124 to send the content along path 134 to bypass the legacy encryption device, which has no function in delivery of content to a non-legacy encryption enabled subscriber terminal.
- the "critical" and “non-critical” content can be stored as a single file at VOD server 22.
- the full content (“critical” and “non-critical”) is routed through either the legacy encryption device 116 or the alternate encryption device 132.
- the content from the single file can be routed based upon PID by routing matrix 120 either to legacy encryption device 116 or routing matrix 124, essentially splitting the single file for selective encryption before reconstitution of the stream.
- blocks 208 and 212 of process 200 are modified to reflect that the content is stored in a single file and that the file is split into "critical" and "non-critical" content upon receipt of a request for the content.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020067011822A KR101085989B1 (en) | 2003-12-16 | 2004-10-18 | Composite session-based encryption of video on demand content |
JP2006545333A JP4694505B2 (en) | 2003-12-16 | 2004-10-18 | Composite session-based encryption of video-on-demand content |
CN2004800372102A CN1977534B (en) | 2003-12-16 | 2004-10-18 | Composite session-based encryption of video on demand content |
EP04795278.3A EP1695552B1 (en) | 2003-12-16 | 2004-10-18 | Composite session-based encryption of video on demand content |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US53007103P | 2003-12-16 | 2003-12-16 | |
US60/530,071 | 2003-12-16 | ||
US10/823,431 | 2004-04-13 | ||
US10/823,431 US7343013B2 (en) | 2003-12-16 | 2004-04-13 | Composite session-based encryption of video on demand content |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005060415A2 true WO2005060415A2 (en) | 2005-07-07 |
WO2005060415A3 WO2005060415A3 (en) | 2006-07-06 |
Family
ID=34657339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2004/034091 WO2005060415A2 (en) | 2003-12-16 | 2004-10-18 | Composite session-based encryption of video on demand content |
Country Status (6)
Country | Link |
---|---|
US (1) | US7343013B2 (en) |
EP (1) | EP1695552B1 (en) |
JP (1) | JP4694505B2 (en) |
KR (1) | KR101085989B1 (en) |
CN (1) | CN1977534B (en) |
WO (1) | WO2005060415A2 (en) |
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- 2004-10-18 KR KR1020067011822A patent/KR101085989B1/en not_active IP Right Cessation
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Also Published As
Publication number | Publication date |
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KR101085989B1 (en) | 2011-11-22 |
JP2007520927A (en) | 2007-07-26 |
WO2005060415A3 (en) | 2006-07-06 |
CN1977534B (en) | 2010-05-26 |
CN1977534A (en) | 2007-06-06 |
EP1695552A2 (en) | 2006-08-30 |
US7343013B2 (en) | 2008-03-11 |
EP1695552B1 (en) | 2013-08-07 |
JP4694505B2 (en) | 2011-06-08 |
US20050129233A1 (en) | 2005-06-16 |
KR20060117968A (en) | 2006-11-17 |
EP1695552A4 (en) | 2010-08-25 |
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