Low latency active noise cancellation system with client intercommunication

• US 9,294,449 B2
• Filed: 02/26/2015
• Issued: 03/22/2016
• Est. Priority Date: 01/02/2001
• Status: Expired due to Fees

• Current Assignee: Tranz-Send Broadcasting Network, Inc.
• Original Assignee: Tranz-Send Broadcasting Network, Inc.
• Inventors: Redmond, Scott D.
• Primary Examiner(s): Rahman, Mahfuzur
• Application Number:
  US14/632,172
• Publication Number:
  US 20150188892A1
• Time in Patent Office: 390 Days
• Field of Search: 713/153
• US Class Current: 1/1
• CPC Class Codes: H04L 2463/101 applying security measures for digital rights management data processing systems or methods, specially adapted for commerce, e.g. marketing, shopping, billing, auctions or e-commerce G06Q30/00
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/0457 wherein the sending and receiving network entities apply dynamic encryption, e.g. stream encryption cryptographic mechanisms or cryptographic arrangements for stream encryption H04L9/065
• CPC Class Codes: H04L 63/06 for supporting key management in a packet data network cryptographic mechanisms or cryptographic arrangements for key management H04L9/08
• CPC Class Codes: H04L 63/062 for key distribution, e.g. centrally by trusted party cryptographic mechanisms or cryptographic arrangements for key distribution involving a central third party H04L9/0819
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/611 for multicast or broadcast systems for broadcast or conference H04L12/18; arrangements for broadcast or distribution combined with broadcast H04H20/00; arrangements for broadcast applications with a direct linkage to broadcast information or to broadcast space-time H04H60/00; selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS], H04W4/06
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/101 based on network conditions
• CPC Class Codes: H04L 67/1029 using data related to the state of servers by a load balancer
• CPC Class Codes: H04L 67/104 Peer-to-peer [P2P] networks
• CPC Class Codes: H04L 67/1095 Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
• CPC Class Codes: H04L 67/306 User profiles
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04N 21/2181 comprising remotely distributed storage units, e.g. when movies are replicated over a plurality of video servers distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS], H04L67/1097
• CPC Class Codes: H04N 21/222 Secondary servers, e.g. proxy server, cable television Head-end provisioning of proxy services in data packet switching networks H04L67/56
• CPC Class Codes: H04N 21/2223 being a public access point, e.g. for downloading to or uploading from clients arrangements specially adapted to plural spots in a confined site in broadcast systems H04H20/63
• CPC Class Codes: H04N 21/23103 using load balancing strategies, e.g. by placing or distributing content on different disks, different memories or different servers storage management G06F3/0604; allocation of resources considering the load in multiprogramming arrangements G06F9/505; techniques for rebalancing the load in a distributed system G06F9/5083; access to distributed or replicated servers, e.g. load balancing, in data networks H04L67/1001
• CPC Class Codes: H04N 21/2347 involving video stream encryption
• CPC Class Codes: H04N 21/23476 by partially encrypting, e.g. encrypting the ending portion of a movie
• CPC Class Codes: H04N 21/2393 : involving handling client requests scheduling or organising the servicing of application requests H04L67/60
• CPC Class Codes: H04N 21/25891 : being end-user preferences retrieval of video data in a video database based on user preferences G06F16/739; arrangements for recognizing users' preferences H04H60/46; user profiles in network data switching protocols H04L67/306; processing of user preferences or user profiles in wireless networks H04W8/18
• CPC Class Codes: H04N 21/44055 : by partially decrypting, e.g. decrypting a video stream that has been partially encrypted
• CPC Class Codes: H04N 21/4532 : involving end-user characteristics, e.g. viewer profile, preferences monitoring of user activities for profile generation for accessing a video database G06F16/739; user profiles in network data switching protocols H04L67/306; processing of user preferences or user profiles in wireless networks H04W8/18
• CPC Class Codes: H04N 21/454 : Content or additional data filtering, e.g. blocking advertisements
• CPC Class Codes: H04N 21/6405 : Multicasting data broadcast and multicast in packet switching networks H04L12/18
• CPC Class Codes: H04N 21/6408 : Unicasting
• CPC Class Codes: H04N 21/6581 : Reference data, e.g. a movie identifier for ordering a movie or a product identifier in a home shopping application
• CPC Class Codes: H04N 21/6587 : Control parameters, e.g. trick play commands, viewpoint selection
• CPC Class Codes: H04N 21/812 : involving advertisement data advertising per se G06Q30/02
• CPC Class Codes: H04N 21/8456 : by decomposing the content in the time domain, e.g. in time segments
• CPC Class Codes: H04N 7/162 : Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing

Abstract

A system and method for providing load balanced secure media content and data delivery (10) in a distributed computing environment is disclosed. Media content is segmented and encrypted into a set of individual encrypted segments on a centralized control center (15). Each individual encrypted segment has the same fixed size. The complete set of individual encrypted segments is staged to a plurality of intermediate control nodes (17, 19). Individual encrypted segments are mirrored from the staged complete set to a plurality of intermediate servers (21a-b, 23a-b). Requests are received from clients (11) for the media content at the centralized control center. Each individual encrypted segment in the set is received from one of an intermediate control node and an intermediate server optimally sited from the requesting client. The individual encrypted segments are reassembled into the media content for media playback.

Claims

1. A system for providing load balanced, secure media content delivery in a distributed computing environment, the system comprising:

a centralized control center that segments and encrypts media content into a set of individual encrypted segments, a plurality of the segments being a portion of or the entirety of the media content size, the centralized control center including an encryption module stored in memory and executable by a processor to encrypt each individual segment to a unique encryption key;

a plurality of intermediate servers that mirror individual encrypted segments from a staged set of individual encrypted segments; and

at least one client computer that;

sends requests for the media content to the centralized control center,

receives individual encrypted segments in the set from an intermediate server optimally sited from the requesting client computer, and

reassembles the individual encrypted segments into the media content for media playback, and includes;

a broadcasting module stored in memory and executable by a processor to broadcast a pulse prior to receiving individually encrypted segments, and

a request processing module stored in memory and executable by a processor to select the optimally sited intermediate server based on responses to the pulse for subsequent receipt of individual encrypted segments in the set.

2. The system according to claim 1, further comprising:

the plurality of intermediate servers queuing requests from a plurality of client computers; and

the centralized control center multicasting the individual encrypted segments to the at least one client computer.

3. The system according to claim 1, further comprising an encryption module encrypting each individual encrypted segment to a unique encryption key.

4. The system according to claim 1, in which a codec is executed at each requesting client computer to decode each individual encrypted segment.

5. The system according to claim 1, in which media content delivery is balanced in an intermediate server via the centralized control center.

6. The system according to claim 1, in which media playback is enabled at each requesting client computer prior to receipt of substantially all individual encrypted segments.

7. The system according to claim 1, in which flexible media playback is provided at each requesting client computer comprising functions selected from a group comprising pause, rewind, fast-forward, skip forward, skip backward, chapter stops, and a shuttle bar.

8. The system according to claim 1, in which a pulse is broadcasted from each client computer prior to receiving each individual encrypted segment, and in which the optimally sited intermediate server is selected based on responses to the pulse.

9. The system according to claim 1, in which individual encrypted segments from the staged set is mirrored to a plurality of client computers, and each individual encrypted segment is received from one of an intermediate server and a client computer optimally sited from the requesting client computer.

10. The system according to claim 1, in which individual encrypted segments comprising an initial portion of the media content are staged to a plurality of client computers, and individual encrypted segments comprising a remaining portion of the media content are sent to the plurality of client computers upon request.

11. A method for providing load balanced secure media content delivery in a distributed computing environment, comprising:

segmenting and encrypting media content into a set of individual encrypted segments at a centralized control center, a plurality of the segments being a portion of or the entirety of the media content size, the centralized control center including an encryption module stored in memory and executable by a processor to encrypt each individual segment to a unique encryption key;

mirroring individual encrypted segments from a staged complete set of the individual encrypted segments to a plurality of intermediate servers;

receiving requests from client computers for the media content at the centralized control center;

receiving each individual encrypted segment in the set from an intermediate server optimally sited from the requesting client computer; and

reassembling the individual encrypted segments into the media content for media playback, the client computers each including;

a broadcasting module stored in memory and executable by a processor to broadcast a pulse prior to receiving individually encrypted segments, and

a request processing module stored in memory and executable by a processor to select the optimally sited intermediate server based on responses to the pulse for subsequent receipt of individual encrypted segments in the set.

12. The method according to claim 11, further comprising:

queuing requests from a plurality of client computers on at least one of one such intermediate server; and

multicasting the individual encrypted segments to the client computers.

13. The method according to claim 11, further comprising:

encrypting each individual encrypted segment to a unique encryption key.

14. The method according to claim 11, further comprising:

executing a codec at each requesting client computer to decode each individual encrypted segment.

15. The method according to claim 11, further comprising:

balancing media content delivery in an intermediate server via the centralized control center.

16. The method according to claim 11, further comprising:

enabling media playback at each requesting client computer prior to receipt of substantially all individual encrypted segments.

17. The method according to claim 11, further comprising:

providing flexible media playback at each requesting client computer comprising functions selected from a group comprising pause, rewind, fast-forward, skip forward, skip backward, chapter stops, and a shuttle bar.

18. The method according to claim 11, further comprising:

broadcasting a pulse from each requesting client computer prior to receiving each individual encrypted segment; and

selecting the optimally sited intermediate server based on responses to the pulse.

19. The method according to claim 11, further comprising:

mirroring individual encrypted segments from the staged complete set to a plurality of client computers; and

receiving each individual encrypted segment in the set from one of an intermediate server and a client computer optimally sited from the requesting client computer.

20. The method according to claim 11, further comprising:

staging individual encrypted segments comprising an initial portion of the media content to a plurality of client computers; and

sending individual encrypted segments comprising a remaining portion of the media content to the plurality of client computers upon request.

21. A non-transitory computer-readable storage medium having embodied thereon a program, the program executable by a processing unit to perform a method for providing load balanced secure media content delivery in a distributed computing environment, the method comprising:

segmenting and encrypting media content into a set of individual encrypted segments at a centralized control center, a plurality of the segments being a portion of or the entirety of the media content size, the centralized control center including an encryption module stored in memory and executable by a processor to encrypt each individual segment to a unique encryption key;

mirroring individual encrypted segments from a staged complete set of the individual encrypted segments to a plurality of intermediate servers;

receiving requests from one or more client computers for the media content at the centralized control center;

receiving each individual encrypted segment in the set from an intermediate server optimally sited from the requesting client computer; and

reassembling the individual encrypted segments into the media content for media playback, the client computers each including;

a broadcasting module stored in memory and executable by a processor to broadcast a pulse prior to receiving individually encrypted segments, and

a request processing module stored in memory and executable by a processor to select the optimally sited intermediate server based on responses to the pulse for subsequent receipt of individual encrypted segments in the set.

22. The non-transitory computer-readable storage medium according to claim 21, further comprising:

queuing requests from a plurality of client computers on at least one of one such intermediate server; and

multicasting the individual encrypted segments to the client computers.

23. The non-transitory computer-readable storage medium according to claim 21, further comprising:

encrypting each individual encrypted segment to a unique encryption key.

24. The non-transitory computer-readable storage medium according to claim 21, further comprising:

executing a codec at each requesting client to decode each individual encrypted segment.