Philips ElectronicsMarch 5, 2003 Architecture for Protection of Content Via Watermarks Michael Epstein Raymond Krasinski Philips Electronics

March 5, 2003 Outline Problem Statement A Simple System A Comprehensive System The Vacation Home Scenario

Philips ElectronicsMarch 5, 2003 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

Philips ElectronicsMarch 5, 2003 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

Philips ElectronicsMarch 5, 2003 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

Philips ElectronicsMarch 5, 2003 Copy Never Watermark System (Record Control) Pressed disk (CNWM-ROM) DVD PlayerDVD Recorder

Philips ElectronicsMarch 5, 2003 Copy Never Watermark System (Play Control) Pressed disk (CNWM-ROM) DVD PlayerDVD Recorder Non-compliant DVD Recorder R/RW disk (CNWM-R/RW)

Philips ElectronicsMarch 5, 2003 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

Philips ElectronicsMarch 5, 2003 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

Philips ElectronicsMarch 5, 2003 Comprehensive System (1) UWM DVD Recorder HDTV (RF) Digital Analog UWM-recorded DVD PlayerDVD Recorder UWM-recorded physical Television Receiver

Philips ElectronicsMarch 5, 2003 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

Philips ElectronicsMarch 5, 2003 Failure to Traverse the Internet UWM-recorded Internet UWM-altered DVD RecorderDVD Player A/D (compression) Non-compliant DVD Recorder DVD Player Physical UWM Digital altered Analog altered Physical altered

Philips ElectronicsMarch 5, 2003 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

Philips ElectronicsMarch 5, 2003 Comprehensive System (2) Internet D/A UWM Storage Device Remote Location Near Location UWM HDTV (RF) Remote Digital Remote Analog Remote HDTV (RF) Near Display Unregulated Device Unregulated Demodulator

Philips ElectronicsMarch 5, 2003 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