Segment based digital content protection

• US 8,935,796 B2
• Filed: 03/14/2008
• Issued: 01/13/2015
• Est. Priority Date: 03/14/2008
• Status: Active Grant

• Current Assignee: Zhigu Holdings Limited
• Original Assignee: Microsoft Corporation
• Inventors: Sloo, David, Barrett, Peter
• Primary Examiner(s): LEWIS, LISA C
• Application Number:
  US12/049,129
• Publication Number:
  US 20090235361A1
• Time in Patent Office: 2,496 Days
• Field of Search: 705 50- 51, 705/54
• US Class Current: 726/26
• 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]

Abstract

Techniques are disclosed herein for applying different content protection schemes to different segments of digital content. A method for protecting digital content includes determining segments within digital content that is organized to allow presentation in a certain order. Each of the segments is assigned to a category of a group of categories. Each of the categories has a different content protection scheme associated therewith. One of the protection schemes is applied to each segment based on the category associated with the segment.

Claims

1. A device comprising:

storage that stores audio-video digital content to be processed by the device, the device is a first device;

an enforcement mechanism that enforces a content protection scheme that restricts certain actions from be performed with respect to the audio-video digital content, the certain actions include copying and distributing the audio-video digital content; and

a segment based protection scheme mechanism that divides the audio-video digital content into a group of protected segments for which the certain actions are prohibited and a group of unprotected segments for which the certain actions are permitted;

the enforcement mechanism allows a first action of the certain actions with respect to a portion of the audio-video digital content to be attempted if the portion is entirely within a first segment of the unprotected segments and prevents the first action from being attempted if the portion is within a protected segment, the first action is sending an identifier to a remote device that is not authorized to play the entire audio-video digital content to obtain a version of the first segment.

2. The device as recited in claim 1, wherein the enforcement mechanism prevents a second action of copying the portion of the audio-video digital content.

3. The device as recited in claim 1, wherein:

the first action is exporting information that allows an entity that is not authorized to play the entire audio-video digital content to play the portion of the audio-video digital content.

4. The device as recited in claim 1, wherein:

the segment based protection scheme mechanism divides the audio-video digital content based on information embedded in the audio-video digital content to define which portions of the audio-video digital content are to be protected and which portions are to be un-protected.

5. The device of claim 1, wherein the segment based protection scheme mechanism divides the audio-video content into a plurality of content segments and an advertisement segment between two of the content segments, the advertisement segment is the first segment, the plurality of content segments are protected segments.

6. The device as recited in claim 1, wherein the enforcement mechanism prevents a second action of distributing the portion of the audio-video digital content.

7. A computer readable storage device having stored thereon instructions which, when executed on a processor, cause the processor to:

receive audio video content at a client device over a connection from a content distributor;

detect information embedded in the audio video content that indicates that content in certain segments of the audio video content is to have a content protection scheme that allows certain actions that are otherwise restricted, the audio video content includes a sequence of frames that are organized for presentation in a certain order, one or more of the segments is rights protected, one or more of the segments is freely distributable and copyable, each of the segments includes a plurality of the frames;

receive a request from a user to perform a rights restricted action of the certain actions with respect to a first group of frames of the sequence of frames;

determine whether the first group of frames is within one or more of the certain segments;

if the first group of frames are within one or more of the certain segments, allow the rights restricted action to be performed, the rights restricted action is sending an identifier to a remote device that is not authorized to play the entire audio video content to obtain an unprotected version of the first group of frames; and

if the first group of frames are not within one or more of the certain segments, prevent the rights restricted action from being performed.

8. The computer readable storage device as recited in claim 7, wherein:

the rights restricted action is exporting information that allows an entity that is not authorized to play the entire audio video content to play a portion of the audio video content associated with the first group of frames.

9. The computer readable storage device as recited in claim 7, wherein the receiving a request from a user to perform a rights restricted action of the certain actions includes:

receiving a selection of a stored marker that identifies a portion of the audio video content associated with the first group of frames.

10. The computer readable storage device as recited in claim 9, further including instructions which, when executed on the processor, cause the processor to perform:

storing the marker in response to a user request when the user is playing the audio video content.

11. A method comprising:

accessing media content at a client device over a connection from a content distributor, the media content comprising a plurality of segments, a first group of the segments having a first protection scheme for which copying or distributing is prohibited, a second group of the segments having a second protection scheme that allows an identifier of the respective segment to be freely distributed;

receiving a request from a user to send an identifier of a first segment of the segments to a remote device, the identifier allows an unprotected version of the first segment to be obtained;

preventing the identifier from being sent to the remote device when the first segment is in the first group of segments; and

allowing the identifier to be sent to the remote device when the first segment is in the second group of segments that allows an identifier of the respective segment to be freely distributed.

12. The method of claim 11, wherein the second protection scheme prohibits copying or distributing segments in the second group.

13. The method of claim 12, wherein the allowing the identifier to be sent to the remote device when the first segment is in the second group of segments includes:

allowing the identifier to be sent to an entity that is not authorized to play the entire media content.

14. The method of claim 13, wherein the media content includes audio-video content.

15. The method of claim 11, further comprising determining which of the plurality of segments are the first group and which of the plurality of segments are the second group including:

detecting information embedded in the media content that identifies segments that are in the first protection scheme and segments that are in the second protection scheme.

16. The method of claim 11, further comprising determining which of the plurality of segments are the first group and which of the plurality of segments are the second group including:

automatically determining the type of content in each of the plurality of segments.

17. The method of claim 11, wherein the allowing the identifier to be sent to the remote device when the first segment is in the second group of segments that allows an identifier of the respective segment to be freely distributed includes:

providing an Internet link to the first segment.

18. The method of claim 11, wherein the media content includes audio content.

19. The method of claim 11, wherein the media content includes digital content that is organized to allow presentation in a certain order.

20. The method of claim 11, further comprising:

preventing copying the first segment at the client device; and

preventing distributing the first segment from the client device to another device.