CA2413980A1 - Video slice and active region based dual partial encryption - Google Patents

Video slice and active region based dual partial encryption Download PDF

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Publication number
CA2413980A1
CA2413980A1 CA002413980A CA2413980A CA2413980A1 CA 2413980 A1 CA2413980 A1 CA 2413980A1 CA 002413980 A CA002413980 A CA 002413980A CA 2413980 A CA2413980 A CA 2413980A CA 2413980 A1 CA2413980 A1 CA 2413980A1
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Prior art keywords
packets
encrypted
video
frame
unencrypted
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Granted
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CA002413980A
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French (fr)
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CA2413980C (en
Inventor
Brant L. Candelore
Henry Derovanessian
Leo M. Pedlow, Jr.
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Sony Electronics Inc
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Individual
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Priority claimed from US10/037,499 external-priority patent/US7151831B2/en
Application filed by Individual filed Critical Individual
Priority to CA2746510A priority Critical patent/CA2746510C/en
Priority to CA2746621A priority patent/CA2746621C/en
Publication of CA2413980A1 publication Critical patent/CA2413980A1/en
Application granted granted Critical
Publication of CA2413980C publication Critical patent/CA2413980C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • H04N21/23476—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption by partially encrypting, e.g. encrypting the ending portion of a movie
    • H—ELECTRICITY
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    • 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
    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H04N21/23608—Remultiplexing multiplex streams, e.g. involving modifying time stamps or remapping the packet identifiers
    • H—ELECTRICITY
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    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H04N21/2362—Generation or processing of Service Information [SI]
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    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
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    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H04N21/2365—Multiplexing of several video streams
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    • H04N21/258—Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
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    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/26606—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing entitlement messages, e.g. Entitlement Control Message [ECM] or Entitlement Management Message [EMM]
    • 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
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4344—Remultiplexing of multiplex streams, e.g. by modifying time stamps or remapping the packet identifiers
    • 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]
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    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4345—Extraction or processing of SI, e.g. extracting service information from an MPEG stream
    • 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
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4347—Demultiplexing of several video streams
    • 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
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/43607—Interfacing a plurality of external cards, e.g. through a DVB Common Interface [DVB-CI]
    • 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, rendering scenes according to MPEG-4 scene graphs
    • H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 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, rendering scenes according to MPEG-4 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]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/4508—Management of client data or end-user data
    • H04N21/4516—Management of client data or end-user data involving client characteristics, e.g. Set-Top-Box type, software version or amount of memory available
    • 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
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/454—Content or additional data filtering, e.g. blocking advertisements
    • 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
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4623—Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
    • 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

Abstract

A selective encryption encoder and method of dual selective encryption. The selective encryption encoder has a packet identifier that identifies packets of at least one specified packet type, the at least one specified packet type being any of a plurality of packet types including packets containing a video slice headers or packets carrying data appearing in an active area of the image. A packet duplicator duplicates the identified packets to produce first and second sets of the identified packets. The packets are sent to and from a primary encryption encoder to encrypt the first set of identified packets under a first encryption method. A secondary encrypter encrypts the second set of identified packets under a second encryption method.

Claims (97)

1. A method of partially dual encrypting a digital video signal, comprising:
examining unencrypted packets of data in the digital video signal to identify at least one specified packet type, the at least one specified packet type comprising packets containing a video slice header;
encrypting packets identified as being of the specified packet type using a first encryption method to produce first encrypted packets;
encrypting the packets identified as being of the specified packet type using a second encryption method to produce second encrypted packets; and replacing the unencrypted packets of the specified packet type with the first encrypted packets and the second encrypted packets in the digital video signal to produce a partially dual encrypted video signal.
2. The method according to claim 1, wherein the at least one specified packet type further comprises packets containing a video slice header appearing in an active region of a video frame.
3. The method according to claim 1, wherein the at least one specified packet type further comprises any packet carrying data describing an active region of a video frame.
4. The method according to claim 1, wherein the at least one specified packet type further comprises I Frame packets.
5. The method according to claim 4, wherein the at least one specified packet type further comprises packets containing motion vectors in a first P frame following an I Frame.
6. The method according to claim 1, wherein the at least one specified packet type further comprises packets having an intra_slice_flag indicator set.
7. The method according to claim 1, wherein the at least one specified packet type further comprises packets having an intra_slice indicator set.
8. The method according to claim 1, wherein the at least one specified packet type further comprises packets containing an intra_coded macroblock.
9. The method according to claim 1, wherein the at least one specified packet type further comprises packets that carry data for a slice containing an intra_coded macroblock.
10. The method according to claim 1, wherein the at least one specified packet type further comprises packets that carry data for a slice containing multiple intra coded macroblocks.
11. The method according to claim 1, wherein the at least one specified packet type further comprises packets containing data from a first macroblock following the video slice header.
12. The method according to claim 1, wherein the at least one specified packet type further comprises packets containing anchor data.
13. The method according to claim 12, wherein the video data is progressively refreshed video data and wherein at least one specified packet type further comprises P Frame packets.
14. A computer readable medium storing instructions which, when executed on a programmed processor, carry out the method of encrypting a digital video signal according to claim 1.
15. The computer readable medium of claim 14, wherein the medium comprises one of an electronic storage medium and a carrier wave.
16. An electronic transmission medium carrying an encrypted digital video signal encrypted by the method according to claim 1.
17. A method of partially dual encrypting a digital video signal, comprising:
examining unencrypted packets of data in the digital video signal to identify at least one specified packet type, the at least one specified packet type comprising a packet carrying data representing an active region of a video frame;
encrypting packets identified as being of the specified packet type using a first encryption method to produce first encrypted packets;
encrypting the packets identified as being of the specified packet type using a second encryption method to produce second encrypted packets; and replacing the unencrypted packets of the specified packet type with the first encrypted packets and the second encrypted packets in the digital video signal to produce a partially dual encrypted video signal.
18. The method according to claim 17, wherein the at least one specified packet type further comprises packets containing a video slice header appearing in an active region of a video frame.
19. The method according to claim 17, wherein the at least one specified packet type further comprises packets containing a video slice header.
20. The method according to claim 17, wherein the at least one specified packet type further comprises I Frame packets.
21. The method according to claim 20, wherein the at least one specified packet type further comprises packets containing motion vectors in a first P frame following an I Frame.
22. The method according to claim 17, wherein the at least one specified packet type further comprises packets having an intra_slice flag indicator set.
23. The method according to claim 17, wherein the at least one specified packet type further comprises packets having an intra_slice indicator set.
24. The method according to claim 17, wherein the at least one specified packet type further comprises packets containing an intra_coded macroblock.
25. The method according to claim 17, wherein the at least one specified packet type further comprises packets that carry data for a slice containing an intra_coded macroblock.
26. The method according to claim 17, wherein the at least one specified packet type further comprises packets that carry data for a slice containing multiple intra coded macroblocks.
27. The method according to claim 17, wherein the at least one specified packet type further comprises packets containing data from a first macroblock following the video slice header.
28. The method according to claim 17, wherein the at least one specified packet type further comprises packets containing anchor data.
29. The method according to claim 27, wherein the video data is progressively refreshed video data and wherein at feast one specified packet type further comprises P Frame packets.
30. A computer readable medium storing instructions which, when executed on a programmed processor, carry out the method of encrypting a digital video signal according to claim 17.
31. The computer readable medium of claim 30, wherein the medium comprises one of an electronic storage medium and a carrier wave.
32. An electronic transmission medium carrying an encrypted digital video signal encrypted by the method according to claim 17.
33. A method of partially dual encrypting a digital video signal, comprising:
examining unencrypted packets of data in the digital video signal to identify at least one specified packet type;
encrypting packets identified as being of the specified packet type using a first encryption method to produce first encrypted packets;
encrypting the packets identified as being of the specified packet type using a second encryption method to produce second encrypted, packets; and replacing the unencrypted packets of the specified packet type with the first encrypted packets and the second encrypted packets in the digital video signal to produce a partially dual encrypted video signal;
wherein, the at least one selected packet type comprises at feast one of the following: packets containing a video slice header appearing in an active region of a video frame, any packet carrying data representing an active region of a video frame, I Frame packets; packets containing motion vectors in a first P frame following an I Frame, packets having an intra_slice_flag indicator set, packets having an intra_slice indicator set, packets containing an intra_coded macroblock, packets that carry data for a slice containing an intra_coded macroblock, packets containing data from a first macroblock following the video slice header, packets containing video slice headers, packets containing anchor data, and P Frame packets for progressively refreshed video data.
34. The method according to claim 33, further comprising selecting the at least one selected packet type in a control processor.
35. The method according to claim 34, wherein the selecting is carried out to satisfy constraints on an amount of bandwidth available and a selected level of security.
36. A computer readable medium storing instructions which, when executed on a programmed processor, carry out the method of encrypting a digital video signal according to claim 33.
37. The computer readable medium of claim 36, wherein the medium comprises one of an electronic storage medium and a carrier wave.
38. An electronic transmission medium carrying an encrypted digital video signal encrypted by the method according to claim 33.
39. A selective encryption encoder, comprising:
type;
a packet identifier that identifies packets of at least one specified packet a packet duplicator that duplicates the identified packets to produce first and second sets of the identified packets;
means for sending and receiving packets to and from a primary encryption encoder to encrypt the first set of identified packets under a first encryption method;
a secondary encrypter for encrypting the second set of identified packets under a second encryption method; and wherein the packet identifier identifies packets of at least one of the following specified types: packets containing a video slice header appearing in an active region of a video frame, any packet carrying data representing an active region of a video frame, I Frame packets, packets containing motion vectors in a first P frame following an I Frame, packets having an intra_slice flag indicator set, packets having an intra_slice indicator set, packets containing an intra_coded macroblock, packets that carry data for a slice containing an intra_coded macroblock, packets containing data from a first macroblock following the video slice header, packets containing video slice headers, packets containing anchor data, and P Frame packets for progressively refreshed video data.
40. The selective encryption encoder according to claim 39, further comprising a control processor that selects the at least one selected packet type.
41. The selective encryption encoder according to claim 40, wherein the selecting is carried out to satisfy constraints on an amount of bandwidth available and a selected level of security.
42. A selective encryption encoder, comprising:
a packet identifier that identifies packets of at least one specified packet type, the at least one specified packet type comprising a packet carrying data representing an active region of a video frame;
a packet duplicator that duplicates the identified packets to produce first and second sets of the identified packets;
means for sending and receiving packets to and from a primary encryption encoder to encrypt the first set of identified packets under a first encryption method;
a secondary encrypter for encrypting the second set of identified packets under a second encryption method.
43. The selective encryption encoder according to claim 42, wherein the at least one specified packet type further comprises packets containing a video slice header appearing in an active region of a video frame.
44. The selective encryption encoder according to claim 42, wherein the at feast one specified packet type further comprises packets containing a video slice header.
45. The selective encryption encoder according to claim 42, wherein the at least one specified packet type further comprises I Frame packets.
46. The selective encryption encoder according to claim 45, wherein the at least one specified packet type further comprises packets containing motion vectors in a first P frame following an I Frame.
47. The selective encryption encoder according to claim 42, wherein the at least one specified packet type further comprises packets having an intra_slice_flag indicator set.
48. The selective encryption encoder according to claim 42, wherein the at least one specified packet type further comprises packets having an intra_slice indicator set.
49. The selective encryption encoder according to claim 42, wherein the at least one specified packet type further comprises packets containing an intra_coded macroblock.
50. The selective encryption encoder according to claim 42, wherein the at least one specified packet type further comprises packets that carry data for a slice containing an intra_coded macroblock.
51. The selective encryption encoder according to claim 42, wherein the at least one specified packet type further comprises packets that carry data for a slice containing multiple intra_coded macroblocks.
52. The selective encryption encoder according to claim 42, wherein the at least one specified packet type further comprises packets containing data from a first macroblock following the video slice header.
53. The selective encryption encoder according to claim 42, wherein the at least one specified packet type further comprises packets containing anchor data.
54. The selective encryption encoder according to claim 42, wherein the video data is progressively refreshed video data and wherein at least one specified packet type further comprises P Frame packets.
55. A selective encryption encoder, comprising:
a packet identifier that identifies packets of at least one specified packet type, the at least one specified packet type comprising packets containing a video slice header;
a packet duplicator that duplicates the identified packets to produce first and second sets of the identified packets;
means for sending and receiving packets to and from a primary encryption encoder to encrypt the first set of identified packets under a first encryption method;
a secondary encrypter for encrypting the second set of identified packets under a second encryption method.
56. The selective encryption encoder according to claim 55, wherein the at least one specified packet type further comprises packets containing a video slice header appearing in an active region of a video frame.
57. The selective encryption encoder according to claim 55, wherein the at least one specified packet type further comprises any packet carrying data representing an active region of a video frame.
58. The selective encryption encoder according to claim 55, wherein the at least one specified packet type further comprises I Frame packets.
59. The selective encryption encoder according to claim 55, wherein the at least one specified packet type further comprises packets containing motion vectors in a first P frame following an I Frame.
60. The selective encryption encoder according to claim 55, wherein the at least one specified packet type further comprises packets having an intra_slice_flag indicator set.
61. The selective encryption encoder according to claim 55, wherein the at least one specified packet type further comprises packets having an intra_slice indicator set.
62. The selective encryption encoder according to claim 55, wherein the at least one specified packet type further comprises packets containing an intra_coded macroblock.
63. The selective encryption encoder according to claim 55, wherein the at least one specified packet type further comprises packets that carry data for a slice containing an intra_coded macroblock.
64. The selective encryption encoder according to claim 55, wherein the at least one specified packet type further comprises packets that carry data for a slice containing multiple intra_coded macroblocks.
65. The selective encryption encoder according to claim 55, wherein the at least one specified packet type further comprises packets containing data from a first macroblock following the video slice header.
66. The selective encryption encoder according to claim 55, wherein the at least one specified packet type further comprises packets containing anchor data.
67. The selective encryption encoder according to claim 66, wherein the video data is progressively refreshed video data and wherein at least one specified packet type further comprises P Frame packets.
68. A television set-top box, comprising:
a receiver receiving a digital television signal comprising:
a plurality of unencrypted packets; and a plurality of encrypted packets, wherein the encrypted packets are of at least one selected packet type and the at least one selected packet type comprises at least one of the following: packets containing a video slice header appearing in an active region of a video frame, any packet carrying data describing an active region of a video frame, I Frame packets, packets containing motion vectors in a first P frame following an I Frame, packets having an intra_slice_flag indicator set, packets having an intra_slice indicator set, packets containing an intra_coded macroblock, packets that carry data for a slice containing an intra_coded macroblock, packets containing data from a first macroblock following the video slice header, packets containing video slice headers, packets containing anchor data, and P Frame packets for progressively refreshed video data;
a decrypter that decrypts the encrypted packets; and a decoder that decodes the unencrypted packets and the decrypted packets to produce a signal suitable for play on a television set.
69. A television set-top box, comprising:
a receiver receiving a digital television signal comprising:
a plurality of unencrypted packets; and a plurality of encrypted packets, wherein certain of the encrypted packets carry data describing an active region of a video frame;
a decrypter that decrypts the encrypted packets; and a decoder that decodes the unencrypted packets and the decrypted packets to produce a signal suitable for play on a television set.
70. A television set-top box, comprising:
a receiver receiving a digital television signal comprising:
a plurality of unencrypted packets; and a plurality of encrypted packets, wherein certain of the encrypted packets carry a video slice header;
a decrypter that decrypts the encrypted packets; and a decoder that decodes the unencrypted packets and the decrypted packets to produce a signal suitable for play on a television set.
71. A selective encryption decoder, for decrypting and decoding a selectively encrypted digital video signal, comprising:
a demultiplexer that receives packets of digital video, certain of the packets being unencrypted and certain of the packets being encrypted, wherein certain of the encrypted packets carry data representing an active region of a video frame;
the unencrypted packets having a first packet identifier (PID) and the encrypted packets having a second packet identifier (PID);
a decrypter receiving the encrypted packets having the second PID and decrypting the encrypted packets using a first encryption method to produce decrypted packets;
a PID remapper that changes at least one of the first and second PIDs so that the unencrypted packets and the decrypted packets have the same PID; and a decoder that decodes the unencrypted and decrypted packets to produce a decoded video signal.
72. A selective encryption decoder, for decrypting and decoding a selectively encrypted digital video signal, comprising:
a demultiplexer that receives packets of digital video, certain of the packets being unencrypted and certain of the packets being encrypted, wherein certain of the encrypted packets carry a video slice header;
the unencrypted packets having a first packet identifier (PID) and the encrypted packets having a second packet identifier (PID);
a decrypter receiving the encrypted packets having the second PID and decrypting the encrypted packets using a first encryption method to produce decrypted packets;
a PID remapper that changes at least one of the first and second PIDs so that the unencrypted packets and the decrypted packets have the same PID; and a decoder that decodes the unencrypted and decrypted packets to produce a decoded video signal.
73. A selective encryption decoder, for decrypting and decoding a selectively encrypted digital video signal, comprising:
a demultiplexer that receives packets of digital video, certain of the packets being unencrypted and certain of the packets being encrypted, wherein certain of the encrypted packets carry at least one of the following: packets containing a video slice header appearing in an active region of a video frame, any packet carrying data describing an active region of a video frame, I Frame packets, packets containing motion vectors in a first P frame following an I Frame, packets having an intra_slice_flag indicator set, packets having an intra_slice indicator set, packets containing an intra_coded macroblock, packets that carry data for a slice containing an intra_coded macroblock, packets containing data from a first macroblock following the video slice header, packets containing video slice headers, packets containing anchor data, and P Frame packets for progressively refreshed video data;
the unencrypted packets having a first packet identifier (PID) and the encrypted packets having a second packet identifier (PID);
a decrypter receiving the encrypted packets having the second PID and decrypting the encrypted packets using a first encryption method to produce decrypted packets;
a PID remapper that changes at least one of the first and second PIDs so that the unencrypted packets and the decrypted packets have the same PID; and a decoder that decodes the unencrypted and decrypted packets to produce a decoded video signal.
74. A method of decrypting and decoding a selectively encrypted digital video signal, comprising:
receiving packets of digital video, certain of the packets being unencrypted and certain of the packets being encrypted, wherein certain of the encrypted packets carry data describing an active region of a video frame;
the unencrypted packets having a first packet identifier (PID) and the encrypted packets having a second packet identifier (PID);
decrypting the encrypted packets having the second PID to produce decrypted packets;
remapping at least one of the first and second PIDs so that the unencrypted packets and the decrypted packets have the same PID; and decoding the unencrypted and decrypted packets to produce a decoded video signal.
75. A computer readable medium carrying instructions which, when executed on a programmed processor, carry out the method of decoding and decrypting a digital video signal according to claim 74.
76. The computer readable medium of claim 75, wherein the medium comprises one of an electronic storage medium and a carrier wave.
77. An electronic transmission medium carrying a digital video signal decoded and decrypted by the method according to claim 74.
78. A method of decrypting and decoding a selectively encrypted digital video signal, comprising:
receiving packets of digital video, certain of the packets being unencrypted and certain of the packets being encrypted, wherein certain of the encrypted packets carry a video slice header;
the unencrypted packets having a first packet identifier (PID) and the encrypted packets having a second packet identifier (PID);
decrypting the encrypted packets having the second PID to produce decrypted packets;
remapping at least one of the first and second PIDs so that the unencrypted packets and the decrypted packets have the same PID; and decoding the unencrypted and decrypted packets to produce a decoded video signal.
79. A computer readable medium carrying instructions which, when executed on a programmed processor, carry out the method of decoding and decrypting a digital video signal according to claim 78.
80. The computer readable medium of claim 79, wherein the medium comprises one of an electronic storage medium and a carrier wave.
81. An electronic transmission medium carrying a digital video signal decoded and decrypted by the method according to claim 78.
82. A method of decrypting and decoding a selectively encrypted digital video signal, comprising:
receiving packets of digital video, certain of the packets being unencrypted and certain of the packets being encrypted, wherein certain of the encrypted packets carry at least one of the following: packets containing a video slice header appearing in an active region of a video frame, any packet carrying data describing an active region of a video frame, I Frame packets, packets containing motion vectors in a first P frame following an I Frame, packets having an intra_slice_flag indicator set, packets having an intra_slice indicator set, packets containing an intra_coded macroblock, packets that carry data for a slice containing an intra_coded macroblock, packets containing data from a first macroblock following the video slice header, packets containing video slice headers, packets containing anchor data, and P Frame packets for progressively refreshed video data;
the unencrypted packets having a first packet identifier (PID) and the encrypted packets having a second packet identifier (PID);
decrypting the encrypted packets having the second PID to produce decrypted packets;
remapping at least one of the first and second PIDs so that the unencrypted packets and the decrypted packets have the same PID; and decoding the unencrypted and decrypted packets to produce a decoded video signal.
83. A computer readable medium carrying instructions which, when executed on a programmed processor, carry out the method of decoding and decrypting a digital video signal according to claim 82.
84. The computer readable medium of claim 83, wherein the medium comprises one of an electronic storage medium and a carrier wave.
85. An electronic transmission medium carrying a digital video signal decoded and decrypted by the method according to claim 82.
86. A computer readable medium that carries instructions that when executes on a programmed processor to facilitate operation of a video receiver device to decrypt and decode a selectively encoded digital video signal wherein the instructions comprise:
a code segment that controls a demultiplexer that receives packets of digital video, certain of the packets being unencrypted and certain of the packets being encrypted, wherein certain of the encrypted packets carry data describing an active region of a video frame, the unencrypted packets having a first packet identifier (PID) and the encrypted packets having a second packet identifier (PID);
a code segment that controls decryption of the encrypted packets to produce decrypted packets;
a code segment that controls remapping at least one of the first and second PIDs so that the unencrypted packets and the decrypted packets have the same PID; and a code segment that controls decoding the unencrypted and decrypted packets to produce a decoded video signal.
87. The computer readable medium of claim 86, wherein the medium comprises one of an electronic storage medium and a carrier wave.
88. A computer readable medium that carries instructions that when executes on a programmed processor to facilitate operation of a video receiver device to decrypt and decode a selectively encoded digital video signal wherein the instructions comprise:
a code segment that controls a demultiplexer that receives packets of digital video, certain of the packets being unencrypted and certain of the packets being encrypted, wherein certain of the encrypted packets carry a video slice header, the unencrypted packets having a first packet identifier (PID) and the encrypted packets having a second packet identifier (PID);
a code segment that controls decryption of the encrypted packets to produce decrypted packets;
a code segment that controls remapping at least one of the first and second PIDs so that the unencrypted packets and the decrypted packets have the same PID; and a code segment that controls decoding the unencrypted and decrypted packets to produce a decoded video signal.
89. The computer readable medium of claim 88, wherein the medium comprises one of an electronic storage medium and a carrier wave.
90. A computer readable medium that carries instructions that when executes on a programmed processor to facilitate operation of a video receiver device to decrypt and decode a selectively encoded digital video signal wherein the instructions comprise:
a code segment that controls a demultiplexer that receives packets of digital video, certain of the packets being unencrypted and certain of the packets being encrypted, wherein certain of the encrypted packets carry at least one of the following: packets containing a video slice header appearing in an active region of a video frame, any packet carrying data describing an active region of a video frame, I Frame packets, packets containing motion vectors in a first P frame following an I Frame, packets having an intra_slice_flag indicator set, packets having an intra_slice indicator set, packets containing an intra coded macroblock, packets that carry data for a slice containing an intra_coded macroblock, packets containing data from a first macroblock following the video slice header,packets containing video slice headers, packets containing anchor data, and P Frame packets for progressively refreshed video data;
the unencrypted packets having a first packet identifier (PID) and the encrypted packets having a second packet identifier (PID);
a code segment that controls decryption of the encrypted packets to produce decrypted packets;
a code segment that controls remapping at least one of the first and second PIDs so that the unencrypted packets and the decrypted packets have the same PID; and a code segment that controls decoding the unencrypted and decrypted packets to produce a decoded video signal.
91. The computer readable medium of claim 90, wherein the medium comprises one of an electronic storage medium and a carrier wave.
92. A selectively encrypted digital video signal embodied in a carrier wave, comprising:
a stream of packets of video data, wherein the stream of packets when not encrypted represent a segment of video content;
certain of the packets being unencrypted and certain of the packets being encrypted, wherein certain of the encrypted packets carry a video slice header;
a first segment of code that identifies the unencrypted packets by a first packet identifier (PID); and a second segment of code that identifies the encrypted packets by a second packet identifier (PID).
93. A selectively encrypted digital video signal embodied in a carrier wave, comprising:
a stream of packets of video data, wherein the stream of packets when not encrypted represent a segment of video content;
certain of the packets being unencrypted and certain of the packets being encrypted, wherein certain of the encrypted packets carry data representing an active region of a video frame;
a first segment of code that identifies the unencrypted packets by a first packet identifier (PID); and a second segment of code that identifies the encrypted packets by a second packet identifier (PID).
94. A selectively encrypted digital video signal embodied in a carrier wave, comprising:
a stream of packets of video data, wherein the stream of packets when not encrypted represent a segment of video content;
certain of the packets being unencrypted and certain of the packets being encrypted, wherein the,encrypted packets are of at least one selected packet type and the at least one selected packet type comprises at least one of the following:
packets containing a video slice header appearing in an active region of a video frame, any packet carrying data representing an active region of a video frame, I
Frame packets, packets containing motion vectors in a first P frame following an I Frame, packets having an intra_slice flag indicator set, packets having an intra_slice indicator set, packets containing an intra_coded macroblock, packets that carry data for a slice containing an intra_coded macroblock, packets containing data from a first macroblock following the video slice header, packets containing video slice headers, packets containing anchor data, and P Frame packets for progressively refreshed video data;
a first segment of code that identifies the unencrypted packets by a first packet identifier (PID); and a second segment of code that identifies the encrypted packets by a second packet identifier (PID).
95. A selectively encrypted digital video signal embodied in a computer readable medium, comprising:
a sequence of packets of video data, wherein the sequence of packets when not encrypted represent a segment of video content;
wherein certain of the packets are unencrypted;
wherein certain of the packets have been produced by decrypting encrypted packets;
wherein certain of the decrypted packets carry a video slice header; and a segment of code that identifies the unencrypted packets by a first packet identifier (PID); and a segment of code that identifies the encrypted packets by a second packet identifier (PID).
96. A selectively encrypted digital video signal embodied in a computer readable medium, comprising:
a sequence of packets of video data, wherein the sequence of packets when not encrypted represent a segment of video content;
wherein certain of the packets are unencrypted;
wherein certain of the packets have been produced by decrypting encrypted packets;
wherein certain of the encrypted packets carry data representing an active region of a video frame; and a segment of code that identifies the unencrypted packets by a first packet identifier (PID); and a segment of code that identifies the encrypted packets by a second packet identifier (PID).
97. A selectively encrypted digital video signal embodied in a computer readable medium, comprising:
a sequence of packets of video data, wherein the sequence of packets when not encrypted represent a segment of video content;
wherein certain of the packets are unencrypted;
wherein certain of the packets have been produced by decrypting encrypted packets;
wherein certain of the decrypted packets carry certain of the packets being unencrypted and certain of the packets being encrypted, wherein the encrypted packets are of at least one selected packet type and the at least one selected packet type comprises at least one of the following: packets containing a video slice header appearing in an active region of a video frame, any packet carrying data representing an active region of a video frame, I Frame packets, packets containing motion vectors in a first P frame following an I Frame, packets having an intra_slice_flag indicator set, packets having an intra_slice indicator set, packets containing an intra_coded macroblock, packets that carry data for a slice containing an intra_coded macroblock, packets containing data from a first macroblock following the video slice header, packets containing video slice headers, packets containing anchor data, and P Frame packets for progressively refreshed video data; and a segment of code that identifies the unencrypted packets by a first packet identifier (PID); and a segment of code that identifies the encrypted packets by a second packet identifier (PID).
CA2413980A 2002-01-02 2002-12-10 Video slice and active region based dual partial encryption Expired - Lifetime CA2413980C (en)

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CA2746621A CA2746621C (en) 2002-01-02 2002-12-10 Video slice and active region based dual partial encryption

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US10/037,498 2002-01-02
US10/037,499 US7151831B2 (en) 2001-06-06 2002-01-02 Partial encryption and PID mapping
US10/038,217 US7336787B2 (en) 2001-06-06 2002-01-02 Critical packet partial encryption
US10/037,914 2002-01-02
US10/037,498 US7127619B2 (en) 2001-06-06 2002-01-02 Decoding and decryption of partially encrypted information
US10/038,032 US7139398B2 (en) 2001-06-06 2002-01-02 Time division partial encryption
US10/038,217 2002-01-02
US10/038,032 2002-01-02
US10/037,499 2002-01-02
US10/037,914 US7124303B2 (en) 2001-06-06 2002-01-02 Elementary stream partial encryption
US35182802P 2002-01-24 2002-01-24
US60/351,828 2002-01-24
US35532602P 2002-02-08 2002-02-08
US60/355,326 2002-02-08
US37042702P 2002-04-04 2002-04-04
US60/370,427 2002-04-04
US40967502P 2002-09-09 2002-09-09
US60/409,675 2002-09-09
US10/273,905 US7376233B2 (en) 2002-01-02 2002-10-18 Video slice and active region based multiple partial encryption
US10/273,905 2002-10-18

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CA2746510A1 (en) 2003-07-02
US20120002809A1 (en) 2012-01-05
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US7376233B2 (en) 2008-05-20
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