Watermarking may not be the correct term, the Sigma is inserted into the vertical interval and the audio track. Are you suggesting that we convert the spots to MPEG2 adding the 32 lines of black on top, then Sigma encode. This would then put the Sigma code in the black. I didn’t know if that would work. Secondly, being that the Sigma encoding System requires that you run SDI signal though it in real-time I have no idea how to accomplish this once the spot has been converted to an MPEG2 file.