Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and device for content protection and reading protected content

A technology for content and information protection, applied in the field of record carriers, which can solve the problems of confusion, uselessness, and difficulty in hiding key blocks.

Inactive Publication Date: 2010-01-20
KONINKLIJKE PHILIPS ELECTRONICS NV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] - Key blocks are difficult to hide due to their potential size
Concealment is important because conventional recorders / players that do not support copy protection systems using key blocks may have several problems with non-concealed key blocks: In some cases, a legacy device may be confused by the presence of key block data; a legacy device may accidentally erase or overwrite a key block, making the medium inaccessible to subsequent protected recordings that require such a key block Useless;
A bad example is that storage areas such as key blocks on a BD-RE require a dedicated wobble detector that serves no other purpose

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for content protection and reading protected content
  • Method and device for content protection and reading protected content
  • Method and device for content protection and reading protected content

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] figure 1 The schematic diagram illustrates the layout of a typical DVD+R or DVD+RW record carrier. An information area 1 of a record carrier (not shown) comprises (given in order from the inner area to the outer area of ​​the record carrier) an inner drive area 3 , a lead-in area 5 , a data area 7 , a lead-out area 9 and an outer drive area 11 . The number of sectors increases with increasing radius. The data area 7 starts from the physical sector number $030000 indicated by a dotted line.

[0034] figure 2 shows the layout of a DVD+R record carrier, which consists of figure 1 different regions shown. These zones also include other zones with more detailed descriptions: Nominal Radius, Sector Number, and Physical Sector Number. The areas relevant to the present invention are the start area, buffer 2 and data area.

[0035] image 3 show with figure 2 Layout of the corresponding DVD+RW record carrier.

[0036] Figures 4a to 4d A preferred embodiment of the r...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a record carrier having a data zone (7) and an initial zone (25) and comprising a main channel storing content and a side channel storing address information and data relevant for making recordings. It further relates to methods and devices for protecting content stored on a record carrier and for reading out protected content. To provide a record carrier with content protection information (20, 22, 24, 26, 28) stored on it, which can be used with legacy devices without causing confusion, which can substantially be produced without extra production steps and which can be easily read by common devices, it is proposed to store said content protection information (20, 22, 26, 28) for protection of said content in said side channel in said data zone (7).

Description

technical field [0001] The invention relates to a record carrier having a data field and a start field and comprising a main channel for storing content and a secondary channel for storing address information and related data for recording. The invention also relates to methods and devices for protecting content stored in a record carrier and for reading protected content. The invention also relates to a method of key distribution via a blank recordable medium for a key block for a key block based copy protection system, a record carrier comprising such a key block, a device for reading such a record carrier and A copy protection system for such key blocks is applied. Background technique [0002] Modern systems for protecting content that can be copied to recordable media (except where such protection is done under certain strict conditions, such as copy-once material, or broadcast content protected by a so-called broadcast mark) are almost exclusively Based on so-called ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G11B20/00G11B7/007G11B27/32
Inventor J·C·塔尔斯特拉A·A·M·斯塔林P·G·P·维詹伯格J·G·尼博尔M·J·J·J·-B·梅斯J·H·M·斯普卢特J·J·L·M·范弗勒坎R·A·布朗迪克
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com