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Region restrictive playback system

A region and area code technology, which is applied in the transmission system, digital transmission system, TV system components, etc., can solve the problem of illegal use of digital works by the player

Inactive Publication Date: 2005-08-10
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such players are bothered by their illegal use of digital works

Method used

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  • Region restrictive playback system
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0096] 1. The first embodiment

[0097] The following describes a digital work protection system 10 as a first embodiment of the present invention.

[0098] 1.1 Structure of Digital Works Protection System 10

[0099] Such as figure 1 As shown, the digital work protection system 10 includes a key management device 100, a key information recording device 200, recording devices 300a, 300b, 300c, ... (hereinafter referred to as "recording device 300a, etc."), and a reproduction device 400a, 400b, 400c, ... (hereinafter referred to as "reproduction device 400a, etc.").

[0100] The key management apparatus 100 has key information pre-recorded on a recording medium 500a by the key information recording apparatus 200, thereby generating a recording medium 500b on which the key information has been pre-recorded. Note that the recording medium 500a is a recordable medium on which no information has been recorded, such as a DVD-RAM (Digital Versatile Disc Random Access Memory). Furthermor...

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PUM

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Abstract

DVD-Video discs and playback apparatuses are assigned a region code indicating one of six regions into which the world is divided, for the purpose of protecting copyrights of content such as movies and music. However, playback apparatuses exist that illegally circumvent the function of checking the region code of the disc with the region code of the playback apparatus. The present invention provides a region restrictive viewing / listening system that enables regionally restricted viewing / listening, thereby preventing playback apparatuses which circumvent region code checking from playing back content correctly. A content recording apparatus encrypts content, based on an internally-stored region code, and records the encrypted content to a recording medium. A content playback apparatus decrypts the content, based on an internally-stored region code, and plays back the content.

Description

Technical field [0001] The present invention relates to a technology for providing and playing back digital works, and in particular, to a technology for restricting the playback of a digital work according to the area where a digital work is provided. Background technique [0002] There are many technologies for preventing illegal use of digital works and protecting the copyright of digital works. [0003] Document 1 announced a technology aimed at protecting the copyright of selected content such as movies and music and restricting the right to sell the content. According to this technology, the world is divided into six regions, and DVD video discs and players are given a region code that represents one of these regions. The content can be played back only when the region code owned by the player matches at least one region code recorded on the disc. Here, the player has one region code, but the optical disc may have two or more region codes. In fact, a disc with all the regio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/00G11B27/034G11B27/10H04N5/85H04N5/913
CPCH04N5/85G11B20/00086G11B2220/2575H04N2005/91364G11B20/0021G11B20/00188G11B27/105G11B20/00246G11B2220/2562G11B2220/216G11B27/034H04N5/913G11B20/00739G11B20/00557G11B20/00253G11B20/00G11B20/10
Inventor 中野稔久石原秀志山本直纪馆林诚
Owner PANASONIC CORP