| 摘要 |
A method and system for encoding watermark information (211) within digital data, which can be in a compressed format, with a watermark encoder (212). A sequence of bits representing the watermark information is mapped into a first plurality of groups which includes more bits than the sequence of bits. The bits from each group of the first groups are interleaved to form a second plurality of groups. The bits from the second groups are serialized to form an encoded sequence of bits. Coefficients representing the digital data are modified according to the encoded sequence of bits. In one embodiment, a coefficient is made into an even and odd numbers when the bit has a first and second values, respectively. The digital data can be subsequently read to retrieve the encoded sequence, and the encoded sequence is then decoded and compared to the original watermark information. |
