MPEG2 encoding with watermark

摘要

An MPEG2 moving picture encoding/decoding system provides digital copy protection of digital moving picture data. The MPEG2 moving picture encoder discrete cosine transforms a video input 214 and uses a digital watermark inserter 240 to embed digital watermark information on a frequency domain of the discrete cosine transformed video input signal. The MPEG2 moving picture decoder removes the embedded visual watermark information to locally decode the encoded video signal.