Architecture for Protection of Content Via Watermarks

1. Architecture for Protection of Content Via Watermarks Michael Epstein Raymond Krasinski Philips Electronics

2. Outline • Problem Statement • A Simple System • A Comprehensive System • The Vacation Home Scenario

3. Problem Statement • Prevent the copying of “copy never” content • Pressed disks (purchased DVD) • Video on demand/Pay-per-view • Prevent improper copying of “one generation” content • Prevent the Internet re-transmission to the public of “broadcast content” • Allow personal use when appropriate

4. Watermark Description • An indelible mark that carries information • Does not interfere with the use of content • Should be difficult to remove • Without destroying the content • Should be difficult to write • Should be inexpensive to find • If you know the secrets

5. Watermark-States • Watermark • Copy never • Copy one generation • Unlimited copies, do not transmit over the Internet to the public • No watermark means no technical restrictions at all

6. DVD Recorder DVD Player Copy Never Watermark System(Record Control) Pressed disk (CNWM-ROM)

7. DVD Recorder DVD Player Copy Never Watermark System(Play Control) Pressed disk (CNWM-ROM) R/RW disk (CNWM-R/RW) Non-compliant DVD Recorder

8. Copy Never Watermark System • Record Control • DVD recorder will not record “copy-never” watermarked disk • Play control • Even if a copy is made on an R or RW disk then: • DVD player will not play • DVD recorder will not play • Legacy player or recorder will ignore all watermarks

9. Assumptions • It is difficult to transmit video across the Internet without using lossy compression technologies • Watermark detectors will only exist in certain critical locations • Storage devices or some class of storage devices • Displays • It will be desirable to use licensed/regulated storage and display devices

10. DVD Recorder DVD Recorder DVD Player Television Receiver Comprehensive System (1) UWM UWM-recorded physical UWM-recorded HDTV (RF) Digital Analog

11. Failure to Traverse the Internet • Conversion to analog “alters” the watermark • Compression “alters” the watermark • Altered content will not be recorded • Even if the content with an altered watermark is recorded, the resulting content will not play • In some cases altered watermark content will not be displayed

12. DVD Recorder DVD Player DVD Player Failure to Traverse the Internet Physical UWM Internet Physical altered A/D Digital altered Analog altered UWM-recorded (compression) Non-compliant DVD Recorder UWM-altered

13. Remote/Local Control • Local content • Can be recorded • Transmitted locally • Remote content • Cannot be recorded • Even if recorded cannot be played • Appropriate use of remote content is enabled via controlled means • “vacation home scenario” should be enabled

14. Storage Device Display Comprehensive System (2) UWM Internet HDTV (RF) Remote Digital Remote Analog Remote Near Location HDTV (RF) Near D/A UWM Unregulated Demodulator Unregulated Device Remote Location

15. Summary • Multiple types of content must be protected • Copy never • Copy one generation • Unlimited copies • Local use can be enabled • Including legacy devices • Remote use can be prevented • Special arrangement needed for appropriate use • i.e. vacation home scenario