Digitally watermarked compressed video image sequences
View Patent ↗The invention is a novel watermark in a media sequence and systems and methods for embedding and detecting the watermark. Different watermarks from a watermark set of pseudo random watermarks are selected (randomly or by a selection pattern) and each selected watermark is embedded in a different selected I-frame set of the media stream. Identifying the known sequence of watermarks in the stream of I-frames of a copy can identify the video stream from which the copy originates.
1. A watermarking system comprising:
one or more computer system having one or more central processing units, one or more memories, one or more input/output devices and one or more network connections;
a watermarking process that:
a. receives one or more media streams over one or more of the network interfaces, groups one or more of the I-frames in the media stream into an I-frame set to create a plurality of I-frame sets;
b. creates a watermark set of one or more watermarks from a common watermark, each of the watermarks being related to the common watermark but different from one another; and
c. marking all the I-frames in a first I-frame set with a first watermark selected from the watermark set and marking all the I-frames in a second I-frame set with a second watermark selected from the watermark set, the second watermark different than the first watermark.
2. A watermarked media stream, as in claim 1 , further comprising one or more I-frame sets with no watermarks.
3. A watermarked media stream, as in claim 1 , further comprising one or more interpolated frames between a pair of I-frames.
4. A watermarked media stream, as in claim 3 , where one or more of the interpolated frames is in an I-frame distribution pattern.
5. A watermarked media stream, as in claim 1 , where the frames in an I-frame set is in an I-frame set pattern.
6. A watermarked media stream, as in claim 1 , where the method of embedding the watermark in two or more I-frame sets in the media stream is in an embedding pattern.
7. A watermarked media stream, as in claim 1 , where the I-frames comprise content in one or more of the following medias: video sequences, still images, and data.
8. A system, as in claim 1 , where each of the watermarks is a pseudo-random watermark selected from a database of pseudo-random common watermarks.
9. A system, as in claim 8 , where each of the pseudo-random watermarks in the database is generated from a random number subset of a pseudo-random number set.
10. A system, as in claim 9 , where the pseudo-random number set is generated with a seed number and a method of construction.
11. A system, as in claim 1 , where each of the watermarks marking each of the I-frame sets is related in a watermark pattern.
12. A watermarked media stream, as in claim 1 , having one or more patterns that are recognized in a target media stream that was copied from an original media stream.
13. A method of watermarking a media stream comprising the steps of:
selecting one or more sets of I-frames from the media stream;
grouping the selected sets of I-frames each into an I-frame set;
creating a plurality of I-frame sets;
creating a watermark set of one or more watermarks from a common watermark, each of the watermarks being related to the common watermark but different from one another; and
marking all the I-frames in a first I-frame set with a first watermark selected from the watermark set and marking all the I-frames in a second I-frame set with a second watermark selected from the watermark set, the second watermark different than the first watermark.
14. A method of watermarking, as in claim 13 , where each of the watermarks is selected from a database of pseudo-random watermarks generated from a database of pseudo random numbers.
15. A method of watermarking, as in claim 14 , where each of the watermarks is created from a unique random number subset of the database.
16. A method of watermarking, as in claim 15 , where the unique random number subset that creates the respective watermark is randomly assigned.
17. A method of watermarking, as in claim 15 , where the unique random number subset that creates the respective watermark is assigned in a predetermined manner.
18. A method of watermarking, as in claim 17 , where there is a relationship between the watermarks due to the assignment.
19. A method of watermarking, as in claim 18 , where the relationship can be used as a pattern recognized in a target media stream that was copied from an original media stream.