Philips ElectronicsMarch 5, 2003 Architecture for Protection of Content Via Watermarks Michael...

Philips Electronics March 5, 2003

Architecture for Protection of Content Via Watermarks

Michael Epstein

Raymond Krasinski

Philips Electronics

Philips Electronics March 5, 2003

Outline

• Problem Statement

• A Simple System

• A Comprehensive System

• The Vacation Home Scenario

Philips Electronics March 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 Electronics March 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 Electronics March 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 Electronics March 5, 2003

Copy Never Watermark System(Record Control)

Pressed disk (CNWM-ROM)

DVD Player

DVD Recorder

Philips Electronics March 5, 2003

Copy Never Watermark System(Play Control)

Pressed disk (CNWM-ROM)

DVD Player

DVD Recorder

Non-compliant DVD Recorder

R/RW disk (CNWM-R/RW)

Philips Electronics March 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 Electronics March 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 Electronics March 5, 2003

Comprehensive System (1)

UWM

DVD Recorder

HDTV (RF)

Digital

Analog

UWM-recorded

DVD Player

DVD Recorder

UWM-recordedphysical

TelevisionReceiver

Philips Electronics March 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 Electronics March 5, 2003

Failure to Traverse the Internet

UWM-recorded

InternetInternet

UWM-altered

DVD Recorder

DVD Player

A/D

(compression)

Non-compliant DVD Recorder

DVD Player

Physical UWM

Digital altered

Analog altered

Physical altered

Philips Electronics March 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 Electronics March 5, 2003

Comprehensive System (2)

InternetInternet

D/A

UWM

Storage Device

Remote Location

Near Location

UWM

HDTV (RF) Remote

Digital Remote

Analog Remote

HDTV (RF) Near

DisplayUnregulated

Device

Unregulated Demodulator

Philips Electronics March 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