Header translation modification

• US 10,574,629 B2
• Filed: 03/24/2016
• Issued: 02/25/2020
• Est. Priority Date: 03/27/2015
• Status: Active Grant

• Current Assignee: PRJ Holding Company LLC
• Original Assignee: Piksel Incorporated
• Inventors: Valsecchi, Stefano, Tornielli, Giorgio
• Primary Examiner(s): Patel, Ashokkumar B
• Assistant Examiner(s): Farooqui, Quazi
• Application Number:
  US15/561,676
• Publication Number:
  US 20180083920A1
• Time in Patent Office: 1,433 Days
• Field of Search: 713154, 713150, 713165, 713167, 380200
• CPC Class Codes: G06F 21/105 Arrangements for software license management or administration, e.g. for managing licenses at corporate level
• CPC Class Codes: G06F 21/1073 Conversion
• CPC Class Codes: H04L 63/0236 Filtering by address, protocol, port number or service, e.g. IP-address or URL
• CPC Class Codes: H04L 63/0442 wherein the sending and receiving network entities apply asymmetric encryption, i.e. different keys for encryption and decryption cryptographic mechanisms or cryptographic arrangements for public-key encryption H04L9/30
• 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 63/168 above the transport layer

Abstract

There is disclosed a video player comprising a Widevine decoder, further comprising: a receiver for receiving an asset and an associated manifest file; a search engine for searching the manifest file to identify a KeyID field; a Widevine header creation module for creating a Widevine header including: a KeyID field corresponding to the identified KeyID field of the asset manifest file; and a ContentID field based on the identified KeyID field of the asset manifest file, wherein the format of the KeyID field and the created ContentID field of the created Widevine header are different; an interface for transmitting a request for a license to a Widevine license server, the request including the created Widevine header, and for receiving a Widevine license from the Widevine license server responsive to the request; and a controller for accessing video content associated with the asset using the Widevine license. There is disclosed a Widevine license server configured to: receive a license request including a Widevine header from a video player; transmit the Widevine header to a Widevine processing function; receive the ContentID field of the Widevine header from the Widevine processing function; parse the ContentID field, and in dependence on identification of the syntax of said field, using the KeyID field to obtain a Widevine license; and transmit the accessed Widevine license to the video player.

Claims

1. A client device comprising a content protection decoder according to a Widevine standard, comprising:

a receiver for receiving an asset including video content and an associated manifest file, wherein the asset is associated with content protection according to a further standard, the Widevine and the further standards being in accordance with a common standard but being different from each other;

a search engine for identifying a KeyID field of the common standard associated with the received asset;

a creation module stored in a memory of the client device and implemented by a processor, the creation module for creating a Widevine content protection header for the asset in accordance with the Widevine standard based on the KeyID field, the Widevine content protection header including a KeyID field corresponding to the identified KeyID field of the asset manifest file, and a ContentID field based on the identified KeyID field of the asset manifest file, wherein a format of the KeyID field and the created ContentID field of the created Widevine header are different;

an interface for transmitting a request for a license to a Widevine license server and identifying the Widevine content protection header, and for receiving a Widevine license responsive to the request; and

a controller for accessing the video content associated with the asset using the received Widevine license.

2. The client device of claim 1, wherein the search engine is configured to search for the KeyID field in a generic content tag of the manifest file of the received asset.

3. The client device of claim 1, wherein the search engine is configured to search for the KeyID field in a content protection tag of each supported content protection technology identified in the manifest file of the received asset.

4. The client device of claim 1, wherein the device is configured to determine if there is a PlayReady content protection tag associated with the received asset, and in dependence thereon search for the parameter in a PlayReadyObject Attribute of the PlayReady content protection tag containing a PlayReady header.

5. The client device of claim 1, wherein the device is configured to determine if there is a Marlin content protection tag associated with the received asset, and in dependence thereon search for the parameter in a Marlin header that is contained in the content protection tag for Marlin.

6. A license server configured to generate a license in a Widevine license server by:

receiving a license request from a client device, the license request comprising a ContentID field associated with a Widevine standard;

transmitting the license request to a processing function associated with the Widevine standard;

receiving the ContentID field associated with the Widevine standard from the processing function;

parsing the ContentID field, and in dependence on identification of the syntax of the ContentID field, using a KeyID field to access a Widevine license; and

transmitting the Widevine license to the client device.

13. A license delivery system comprising:

the license server of claim 6; and

a client device comprising a content protection decoder according to the Widevine standard, the client device comprising;

a receiver for receiving an asset and an associated manifest file, wherein the asset is associated with content protection according to a further standard, the Widevine and the further standards being in accordance with a common standard but being different from each other;

a search engine for identifying the KeyID field of the common standard associated with the received asset;

a creation module stored in a memory of the client device and implemented by a processor, the creation module for creating a content protection header for the asset in accordance with the Widevine standard based on the KeyID field, a Widevine content protection header including the KeyID field corresponding to the identified KeyID field of the asset manifest file, and the ContentID field based on the identified KeyID field of the asset manifest file, wherein a format of the KeyID field and the created ContentID field of the created Widevine header are different;

an interface for transmitting a request for the Widevine license to the Widevine license server including the created Widevine content protection header, and for receiving the Widevine license responsive to the request; and

a controller for accessing the content associated with the asset using the Widevine license.

7. A method of generating a license request in accordance with a Widevine standard in a client device, comprising:

receiving an asset including video content and an associated manifest file, wherein the asset is associated with content protection according to a further standard, the Widevine and the further standards being in accordance with a common standard but being different to each other;

identifying a KeyID field of the common standard associated with the received asset;

creating a content protection header for the asset in accordance with the Widevine standard based on the KeyID field, comprising creating a Widevine header including a KeyID field corresponding to the identified KeyID field of the asset manifest file, and a ContentID field based on the identified KeyID field of the asset manifest file, wherein the format of the KeyID field and the created ContentID field of the created Widevine header are different;

transmitting a request for a license to a Widevine license server including the created Widevine content protection header;

receiving a Widevine license responsive to the request; and

accessing the video content associated with the asset using the received Widevine license.

8. A computer program embodied on a non-transitory computer-readable medium which, when executed on a computer device, performs the method of claim 7.

9. A method of generating a license in a Widevine license server, comprising:

receiving a license request from a client device, the license request comprising a Content ID field associated with a Widevine standard;

transmitting the license request to a processing function associated with the Widevine standard;

receiving the Content ID field associated with the Widevine standard from the processing function;

parsing the Content ID field, and in dependence on identification of the syntax of the Content ID field, using a KeyID field to access a Widevine license; and

transmitting the Widevine license to the client device.

10. A computer program product for storing a computer program on a non-transitory computer-readable medium, which when executed on a computer device, performs the method of claim 9.

11. The method of claim 9, wherein the identification of the syntax of the parameter comprises recognising the syntax of the parameter to not be in accordance with a standard syntax of the parameter.

12. The method of claim 11, wherein the identification of the syntax of the parameter further comprises positively identifying the syntax of the parameter.