David, thanks for starting this discussion. On 10 Jan 2014, at 16:56, David Singer <[email protected]> wrote: > > I am only aware of two uses of watermarking in copy protection: > > 1) Define the system such that all players must detect watermarks and refuse > to play unlicensed content. [snip] So, this approach neither meets your goals > nor works well. […] > 2) Use watermarks for forensics. Every copy delivered is watermarked in some > way.
Generally used for online music sales these days if I’m not mistaken. I also recall seeing it recommended by professional photographers associations (such as the ASMP). I seem to remember earlier discussion in here about this type of watermarking, and there was significant push back on the idea (from MarkW?) based on the assumption that such mechanism would defeat any attempt at caching, and thus render an already hairy bandwidth issue even hairier. > Are there other uses of watermarking that anyone thinks work better? Not as far as I know. -- Olivier ----------------------------- http://www.bbc.co.uk This e-mail (and any attachments) is confidential and may contain personal views which are not the views of the BBC unless specifically stated. If you have received it in error, please delete it from your system. Do not use, copy or disclose the information in any way nor act in reliance on it and notify the sender immediately. Please note that the BBC monitors e-mails sent or received. Further communication will signify your consent to this. -----------------------------
