. . . "roller 120, dequantizer 122, IDCT 124, adder 126, frame memory 128, adaptation estimator 130, motion estimator 132, VLC & MUX 136 and buffer 138, respectively, shown in FIG. 1 and previously described. [0068] The digital watermark inserter 240 makes digital watermark information not removable by a user except an author and is embedded on a frequency domain 8???8 discrete-cosine-transform of the en" .