Fingerprinting content via a playlist
View Patent ↗A system and method for fingerprinting content via a playlist are provided. The system includes a content requestor to receive an indication that a request for content is to be served, the content being served with a duplication restriction; a code generator to generate a code with a plurality of bits associated with the content being served, a number of the plurality of bits of the code being defined based on the length of the content divided by a predetermined length of equally sized segments; a playlist generator to generate a playlist to serve a plurality of segments, each of the plurality of segment's length being determined by a corresponding bit of the code; and a playlist transmitter to transmit the playlist along with the content to a visitor or device associated with the request.
1. A system for fingerprinting content via a playlist, comprising:
a data store comprising a non-transitory computer readable medium storing executable computer program instructions;
a processor that executes the computer program instructions to perform steps comprising:
receiving an indication that a request for content is to be served;
generating a code having a plurality of bits associated with the content being served, a number of bits of the code being defined based on a time length of the content;
generating a playlist to serve a plurality of segments of the content, each of the plurality of segment's time length being determined by a corresponding bit value of the code, wherein each of the plurality of segments has a time length based on the following relationship:
a bit value of 1 or 0 corresponds to a segment length shorter by a predetermined time gradient,
a converse bit value of 1 or 0 corresponds to a segment length longer by the predetermined time gradient, and
a null bit value corresponds to a segment length independent of an alteration by the predetermined time gradient; and
transmitting the playlist along with the content to a device associated with the request.
2. The system according to claim 1 , wherein the code is employed to create a watermark associated with the content.
3. The system according to claim 1 , wherein the system stores a lookup table, and the lookup table corresponds to the content, the content's receiver, and the code.
4. The system according to claim 1 , wherein the predetermined time gradient introduces noise not detectable by the content's receiver.
5. The system of claim 1 , wherein generating the playlist further comprises:
associating ones of the plurality of bits of the code with ones of the plurality of segments of the content; and
setting start times of the segments responsive to values of the bits respectively associated with the segments.
6. The system of claim 1 , wherein generating the playlist further comprises:
setting the start time of a segment of the content responsive to a value of a bit of the code associated with the segment, wherein the start time of the segment is set earlier by the predetermined time gradient to represent a first value of the bit and the start time of the segment is set later by the predetermined time gradient to represent a second value of the bit different than the first value.
7. A method implemented on a processor for fingerprinting content via a playlist, comprising:
receiving an indication that a request for content is to be served;
generating a code having a plurality of bits associated with the content being served, a number of the bits of the code being defined based on a time length of the content;
generating a playlist to serve a plurality of segments of the content, each of the plurality of segment's time length being determined by a corresponding bit value of the code, wherein each of the plurality of segments has a time length based on the following relationship:
a bit value of 1 or 0 corresponds to a segment length shorter by a predetermined time gradient,
a converse bit value of 1 or 0 corresponds to a segment length longer by the predetermined time gradient, and
a null bit value corresponds to a segment length independent of an alteration by the predetermined time gradient; and
transmitting the playlist along with the content to a device associated with the request,
the receiving, the generating, or the transmitting being performed via the processor.
8. The method according to claim 7 , wherein the code is generated based on a random assignment.
9. The method according to claim 7 , wherein the code is generated based on an identified aspect of a content consumer to be served the content.
10. The method according to claim 7 , wherein the code is employed to create a watermark associated with the content.
11. The system according to claim 7 , wherein the system stores a lookup table, and the lookup table corresponds to the content, the content's receiver, and the code.
12. The system according to claim 7 , wherein the predetermined time gradient introduces noise not detectable by the content's receiver.
13. The method of claim 7 , wherein generating the playlist further comprises:
associating ones of the plurality of bits of the code with ones of the plurality of segments of the content; and
setting start times of the segments responsive to values of the bits respectively associated with the segments.
14. The method of claim 7 , wherein generating the playlist further comprises:
setting the start time of a segment of the content responsive to a value of a bit of the code associated with the segment, wherein the start time of the segment is set earlier by the predetermined time gradient to represent a first value of the bit and the start time of the segment is set later by the predetermined time gradient to represent a second value of the bit different than the first value.
15. A method implemented on a processor for determining a source of content, comprising:
receiving the content as a plurality of segments having an associated playlist;
determining if the plurality of segments contain a plurality of time gradients by analyzing the playlist;
re-compiling bit values of a code described by the plurality of time gradients, wherein re-compiling the bit values of the code comprises:
determining a bit value of 1 or 0 responsive to a segment having a length shorter by a predetermined time gradient,
determining a converse bit value of 1 or 0 responsive to the segment having a length longer by the predetermined time gradient, and
determining a null bit value responsive to the segment having a length independent of an alteration by the predetermined time gradient; and
comparing the recompiled code with a lookup table to ascertain the source,
the receiving, the determining, the re-compiling, or the comparing being performed via the processor.
16. The method according to claim 15 , wherein determining that the plurality of segments contain a plurality of time gradients further comprises analyzing the content for noise associated with the time gradients.
17. The method according to claim 16 , wherein the noise is caused by a first segment of the content overlapping a second segment of the content.
18. The method according to claim 17 , wherein the noise is caused by a gap in-between the first segment of the content and a second segment of the content.
19. The method according to claim 15 , further comprising a watermark associated with the re-compiled code embedded into the content.