SYSTEMS AND METHODS FOR AUTOMATICALLY GENENRATING TOP LEVEL INDEX FILES

• US 20130051554A1
• Filed: 12/30/2011
• Published: 02/28/2013
• Est. Priority Date: 08/31/2011
• Status: Active Grant

• Current Assignee: Sonic IP Incorporated (Endeavor Group Holdings Inc.)
• Original Assignee: DivX, LLC (f/k/a DivX CF Holdings LLC) (SoftBank Group Corp.)
• Inventors: Braness, Jason, Wallin, Evan, Ferreira, Ederson
• Granted Patent: US 8,787,570 B2
• Time in Patent Office: Days
• US Class Current: 380/200
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 65/60 Network streaming of media packets
• CPC Class Codes: H04L 65/61 for supporting one-way streaming services, e.g. Internet radio
• CPC Class Codes: H04L 65/762 at the source reformatting of additional data in video distribution servers H04N21/2355
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]
• CPC Class Codes: H04N 21/2385 Channel allocation H04N21/266 takes precedence; Bandwidth allocation H04N21/24 takes precedence ; allocation of channels according to the instantaneous demands of the users in time-division multiplex systems H04J3/1682; admission control, resource allocation in open networks H04L12/5692; arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896; negotiating bandwidth in wireless networks H04W28/16
• CPC Class Codes: H04N 21/2393 involving handling client requests scheduling or organising the servicing of application requests H04L67/60
• CPC Class Codes: H04N 21/2541 Rights Management protecting software against unauthorised usage in a vending or licensing environment G06F21/10; security in data switching network management H04L41/28; security management or policies for network security H04L63/20; access security in wireless networks H04W12/08
• CPC Class Codes: H04N 21/25825 involving client display capabilities, e.g. screen resolution of a mobile phone optimising the visualisation of content during browsing in the Internet G06F16/9577; processing of terminal status or physical abilities in wireless networks H04W8/22; authentication in wireless network security H04W12/06
• CPC Class Codes: H04N 21/25841 involving the geographical location of the client retrieval from the Internet by querying based on geographical locations G06F16/9537; arrangements for identifying locations of receiving stations in broadcast systems H04H60/51; location of the user terminal in data switching networks H04L67/52; services making use of the location of users or terminals in wireless networks H04W4/02; locating users or terminals in wireless networks H04W64/00
• CPC Class Codes: H04N 21/26258 for generating a list of items to be played back in a given order, e.g. playlist, or scheduling item distribution according to such list retrieval of multimedia data based on playlists G06F16/40
• CPC Class Codes: H04N 21/47202 for requesting content on demand, e.g. video on demand
• 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 21/8352 involving content or source identification data, e.g. Unique Material Identifier [UMID]

Abstract

Systems and methods for automatically generating top level index files for use in adaptive bitrate streaming in accordance with embodiments of the invention are disclosed. One embodiment of the method of the invention includes receiving a request from a playback device at a playback server, where the request identifies a piece of content, retrieving a list of assets associated with the identified piece of content using the playback server, filtering the list of assets using at least one predetermined criterion using the playback server, generating a top level index file describing each asset in the filtered list of assets using the playback server, and sending the top level index file to the playback device using the playback server.

Claims

1. A method of generating a top level index file, comprising:

receiving a request from a playback device at a playback server, where the request identifies a piece of content;

retrieving a list of assets associated with the identified piece of content using the playback server;

filtering the list of assets using at least one predetermined criterion using the playback server;

generating a top level index file describing each asset in the filtered list of assets using the playback server; and

sending the top level index file to the playback device using the playback server.

2. The method of claim 1, wherein:

the request from the playback device also includes information describing the capabilities of the playback device; and

the playback server filters the list of assets based upon the capabilities of the playback device.

3. The method of claim 2, wherein:

the information describing the capabilities of the playback device is a product identifier; and

the method further comprising retrieving at least one device capability based upon the product identifier using the playback server.

4. The method of claim 2, wherein the device capability is at least one device capability selected from the group consisting of:

display aspect ratio, anticipated maximum network connection data rate, device outputs, supported formats, device buffer size, device resolution, device region, and device language.

5. The method of claim 1, wherein the at least one predetermined criterion includes whether the playback device has access to assets associated with premium content.

6. The method of claim 1, wherein:

the request from the playback device also includes information indicative of the geographic location of the playback device; and

the at least one predetermined criterion includes whether an asset is permitted to be played back in the geographic location indicated by the request.

7. The method of claim 1, wherein the at least one predetermined criterion includes filtering the assets based upon at least one language.

8. The method of claim 1, wherein the playback server maintains a database of assets associated with specific pieces of content.

9. The method of claim 1, wherein the top level index file is a SMIL file.

10. The method of claim 9, wherein generating a top level index file describing each asset in the filtered list of assets using the playback server comprises generating an XML string including a URI for each asset.

11. The method of claim 10, further comprising generating an XML string including a SWITCH element to describe alternative streams for use in adaptive bitrate streaming.

12. The method of claim 10, further comprising generating an XML string including an EXCL element to describe alternative streams for use in conventional streaming.

13. The method of claim 10, wherein the URI references a container file and the XML string for each assets includes an element that defines the size of a header section of the container file.

14. The method of claim 10, wherein the XML string includes an element that identifies the encoding of the asset.

15. The method of claim 10, wherein the XML string of a video asset includes at least one element selected from the group consisting of:

an element that describes the maximum bitrate of the video;

an element that describes the width and height of the video; and

an element that describes the video buffer verifier size of the video.

16. A method for authorizing playback of content, comprising:

receiving a request from a playback device at a playback server, where the request identifies a piece of content;

retrieving a list of assets associated with the identified piece of content using the playback server;

filtering the list of assets using at least one predetermined criterion using the playback server;

generating a top level index file describing each asset in the filtered list of assets using the playback server;

sending the top level index file to the playback device using the playback server;

retrieving cryptographic information using the playback server, where the cryptographic information is used to access protected streams described in the top level index file; and

providing the cryptographic information to the playback device using the playback server.

17. The method of claim 16, wherein the cryptographic information is retrieved by the playback server in response to a request from a playback device to playback the content.

18. The method of claim 16, wherein the cryptographic information is retrieved by the playback server from a database of cryptographic information and is encrypted so that the playback device can access the cryptographic information using cryptographic information stored on the playback device.

19. The method of claim 16, wherein the cryptographic information is retrieved by the playback server from a digital rights management server.

20. The method of claim 16, further comprising confirming that the number of devices on which the user is currently playing back content is less than a predetermined concurrency limit.

21. The method of claim 16, further comprising receiving a play event report from the playback device at the playback server.

22. The method of claim 21, further comprising providing a command to the playback device using the playback server in response to the play event report.

23. The method of claim 22, wherein the play event report includes a playback location.

24. The method of claim 23, further comprising sending a command to resume playback at the playback location indicated in the play event report to a second playback device.

25. The method of claim 24, further comprising sending a command to stop playback to the playback device that generated the play event report using the playback server.

26. A playback server, comprising:

a database that stores descriptions of assets associated with specific pieces of content;

a processor configured using a playback management application;

wherein the playback management application configures the processor to;

receive a request from a playback device identifying a piece of content;

retrieve a list of assets associated with the identified piece of content;

filter the list of assets using at least one predetermined criterion;

generate a top level index file describing each asset in the filtered list of assets; and

send the top level index file to the playback device.

27. The playback server of claim 26, wherein:

the request from the playback device also includes information describing the capabilities of the playback device; and

the playback management application configures the processor to filter the list of assets based upon the capabilities of the playback device.

28. The playback server of claim 27, wherein:

the information describing the capabilities of the playback device is a product identifier; and

the playback management application further configures the processor to retrieve at least one device capability based upon the product identifier.

29. The playback server of claim 27, wherein the device capability is at least one device capability selected from the group consisting of:

display aspect ratio, anticipated maximum network connection data rate, device outputs, supported formats, device buffer size, display resolution, device region, and device language.

30. The playback server of claim 26, wherein the at least one predetermined criterion includes whether the playback device has access to assets associated with premium content.

31. The playback server of claim 26, wherein:

the request from the playback device also includes information indicative of the geographic location of the playback device; and

the at least one predetermined criterion includes whether an asset is permitted to be played back in the geographic location indicated by the request.

32. The playback server of claim 26, wherein the at least one predetermined criterion includes filtering the assets based upon one or more languages.

33. The playback server of claim 26, wherein the playback server maintains a database of assets associated with specific pieces of content.

34. The playback server of claim 26, wherein the top level index file is a SMIL file.

35. The playback server of claim 34, wherein the playback management application configures the processor to generate a top level index file describing each asset in the filtered list of assets by configuring the processor to generate an XML string including a URI for each asset.

36. The playback server of claim 35, wherein the playback management application further configures the processor to generate an XML string including a SWITCH element to describe alternative streams for use in adaptive bitrate streaming.

37. The playback server of claim 35, wherein the playback management application further configures the processor to generate an XML string including an EXCL element to describe alternative streams for use in conventional streaming.

38. The playback server of claim 35, wherein the URI references a container file and the XML string for each asset includes an element that defines the size of a header section of the container file.

39. The playback server of claim 35, wherein the XML string includes an element that identifies the encoding of the asset.

40. The playback server of claim 35, wherein the XML string of a video asset includes at least one element selected from the group consisting of:

an element that describes the maximum bitrate of the video;

an element that describes the width and height of the video; and

an element that describes the video buffer verifier size of the video.

41. The playback server of claim 26, wherein the playback management application further configures the processor to:

retrieve cryptographic information, where the cryptographic information is used to access protected streams described in the top level index file; and

provide the cryptographic information to the playback device.

42. The playback server of claim 41, wherein the playback management application configures the processor to retrieve the cryptographic information in response to a request from a playback device to playback the content.

43. The playback server of claim 41, wherein the playback management application configures the processor to:

retrieve the cryptographic information from a database of cryptographic information; and

encrypt the retrieved cryptographic information so that the playback device can access the retrieved cryptographic information in the clear using cryptographic information stored on the playback device.

44. The playback server of claim 41, wherein the playback management application configures the processor to retrieve the cryptographic information from a digital rights management server.

45. The playback server of claim 41, wherein the playback management application configures the processor to confirm that the number of devices on which the user is playing back content is less than a predetermined concurrency limit.

46. The playback server of claim 41, wherein the playback management application configures the processor to receive a play event report from the playback device.

47. The playback server of claim 46, wherein the playback management application configures the processor to provide a command to the playback device in response to the play event report.

48. The playback server of claim 47, wherein the play event report includes a playback location.

49. The playback server of claim 48, wherein the playback management application further configures the processor to send a command to resume playback at the playback location indicated in the play event report to a second playback device.

50. The playback server of claim 49, wherein the playback management application further configures the processor to send a command to stop playback to the playback device that generated the play event report using the playback server.

51. A machine readable medium containing processor instructions, where execution of the instructions by a processor causes the processor to perform a process comprising:

receiving a request from a playback device identifying a piece of content;

retrieving a list of assets associated with the identified piece of content;

filtering the list of assets using at least one predetermined criterion;

generating a top level index file describing each asset in the filtered list of assets; and

sending the top level index file to the playback device.

52. The machine readable medium of claim 51, wherein the execution of the instructions by a processor causes the processor to perform a process further comprising:

retrieving cryptographic information, where the cryptographic information is used to access protected streams described in the top level index file; and

providing the cryptographic information to the playback device.