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Terminal device and copyright protection system

A terminal device and block data technology, applied in the direction of digital data protection, computer security devices, TV system components, etc., can solve the problems of losing high-quality content, recording and playback devices can no longer use high-quality content, etc. To achieve the effect of improving safety

Inactive Publication Date: 2008-11-19
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In this case, when moving the content from the destination memory card to the original recording and playback device again, the original high-quality content has been lost through image conversion, so the recording and playback device can no longer use the high-definition content. quality content issues

Method used

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  • Terminal device and copyright protection system
  • Terminal device and copyright protection system
  • Terminal device and copyright protection system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0143] 1. The first embodiment

[0144] Next, a copyright protection system 1 as a first embodiment of the present invention will be described with reference to the drawings.

[0145] 1.1 Overview of Copyright Protection System 1

[0146] As shown in FIG. 1, a copyright protection system 1 comprises a recording and reproducing apparatus 10, a content providing apparatus 11, a monitor 12, a speaker 13, a removable recording medium 20 (hereinafter referred to as "removable medium"), and a portable information terminal 30. constitute.

[0147]The content providing apparatus 11 is provided in a broadcasting station, and provides content by broadcasting the content as a digital broadcast program.

[0148] The recording / playback device 10 receives content broadcast from the content providing device 11, and records and plays back the received content. Also, the recording / playback device 10 moves the recorded content to the removable medium 20 and also moves the content recorded on...

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PUM

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Abstract

To provide a terminal device with which, even if content that has undergone conversion is moved to another device, the content before the conversion can be used when moving the content from the device which is a move destination of the content back to a move source of the content. The terminal device stores the content in advance, applies an irreversible conversion which causes a decrease in quality to the content to generate converted content, and writes the converted content to a storage medium. The terminal device encrypts a block in the content using an encryption key to generate an encrypted block, replaces the block in the content with the encrypted block, and writes the encryption key to the storage medium.

Description

technical field [0001] The present invention relates to a terminal device for preventing unauthorized use of content, and a copyright protection system including removable media, and particularly relates to a technique for improving user convenience while preventing unauthorized use. Background technique [0002] In recent years, with the start of BS digital broadcasting and terrestrial digital broadcasting, digital contents such as movies have been widely distributed. Since the copying of digital content (hereinafter referred to as content) is easy, concerns about illegal activities such as piracy via the Internet and other media, and redistribution of copied content have increased, and it is used to combat these illegal activities (protecting content) technology development is constantly evolving. [0003] As a copy protection measure for digital broadcasting programs, a control signal of "copy once" indicating that only one recording is possible is attached and broadcast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F12/14G11B20/10H04N5/91G06F21/10G06F21/62G11B20/00H04N5/781H04N5/907H04N5/913
CPCG11B20/00086H04N2005/91364H04N5/913G06F21/10H04N5/781G11B20/0021H04N2005/91328G11B20/00507G06F2221/2107H04N5/907G06F21/6209G11B20/00818G11B20/00253G06F12/14G06F15/16G06F3/06G06F21/00
Inventor 横田薰大森基司中野稔久原田俊治井藤好克高桥润
Owner PANASONIC CORP