Content identification, and securing media content with steganographic encoding
The present invention relates generally to content identification. Examples of content include imagery, video and audio. One claim recites decompressing a compressed encoded signal, the encoded signal comprising plural-bit information hidden therein; determining whether the plural-bit information is sufficiently hidden in the decompressed encoded signal based on first criteria; and embedding the plural-bit information in the decompressed encoded signal if the plural-bit information is not sufficiently hidden. Another claim recites receiving a plural-bit identifier from a content processor that derives the identifier from sample values representing an audio or image media object; providing the identifier to a remote database via the internet; receiving from the database a profile of a proprietor of the media object, the profile including the proprietor's name and contact information. Of course, other combinations are provided and claimed as well.
1. A method comprising:
steganographically encoding an original media signal with data according to first encoding to yield an encoded media signal, the encoded media signal comprising the data encoded therein;
subjecting the encoded media signal to a transformation to determine whether encoding of the data in the encoded media signal meets predetermined criteria;
if the encoding does not meet the predetermined criteria, repeating said act of steganographically encoding and said act of subjecting until the encoding meets the predetermined criteria.
2. The method of claim 1 wherein the transformation comprises compression, and said act of subjecting further comprises subjecting the encoded media signal to decompression after subjecting the encoded media signal to compression but prior to determining whether encoding of the data in the encoded media signal meets the predetermined criteria.
3. The method of claim 1 wherein the media signal comprises video and the transformation comprises at least compression.
4. The method of claim 1 in which the predetermined criteria comprises encoding signal strength.
5. A method comprising:
hiding plural-bit data in a media signal, said act of hiding resulting in an encoded media signal;
compressing and then decompressing the encoded media signal;
determining whether hiding of the data in the encoded media signal meets first criteria; and
iteratively repeating said act of hiding and said act of compressing and decompressing until said act of determining determines whether the hiding of the data in the encoded media signal meets the first criteria.
6. The method of claim 5 wherein the media signal comprises video or audio.
7. A method comprising:
decompressing a compressed encoded signal, the encoded signal comprising plural-bit information hidden therein;
determining whether the plural-bit information is sufficiently hidden in the decompressed encoded signal based on first criteria; and
embedding the plural-bit information in the decompressed encoded signal if the plural-bit information is not sufficiently hidden.
8. The method of claim 7 wherein the signal comprises video or audio.