Efficient watermarking approaches of compressed media

摘要

Systems and methods are described for imperceptibly embedding information by identifying locations that can be imperceptibly modified, where the imperceptible modification by replacing original content using replacement content derived from elsewhere in the compressed bitstream to remove at least a portion of the original content, generating at least one piece of replacement data for each identified location, where overwriting a portion of the compressed bitstream with replacement data prevents a decoder from decoding original content due to decoding replacement content derived from elsewhere in the compressed bitstream, selecting pieces of replacement data using an embedding device, where overwriting portions of the compressed bitstream using pieces of replacement data encodes payload information in accordance with a predetermined coding scheme, and embedding the payload information in the compressed bitstream by using the embedding device to overwrite at least a portion of the compressed bitstream with the selected replacement data.

主权项

1. A method of imperceptibly embedding information in a compressed video bitstream, comprising:
analyzing the compressed bitstream using a pre-processor to identify locations that can be imperceptibly modified, where the imperceptible modification includes replacing original content using replacement content derived from elsewhere in the compressed bitstream; selecting using the pre-processor one or more of the identified locations to be modified; generating at least one piece of replacement data for each selected location using the pre-processor, where overwriting a portion of the compressed bitstream at a selected location with a piece of replacement data causes a decoder to decode the replacement data instead of the overwritten portion of the compressed bitstream; selecting pieces of replacement data using an embedding device, where each selected piece of replacement data corresponds to a selected location in the compressed bitstream; and embedding the payload information in the compressed bitstream in accordance with a predetermined coding scheme by using the embedding device to overwrite the selected locations in the compressed bitstream with the selected pieces of replacement data.