Digital information copying managing device

A digital information and management device technology, which is applied in the direction of electrical digital data processing, information storage, recording signal processing, etc., can solve the problem of illegal copying of decryption mode, and achieve the effect of preventing illegal copying

Inactive Publication Date: 2006-06-07
YAMAHA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the electronic device disclosed in JP-A-2003-5875, only the wiring form is changed, and the change mode of the wiring form can be easily analyzed, and there is a risk of illegal copying by using the decryption mode

Method used

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Examples

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no. 2 example

[0069] Figure 9 The overall structure of an audio device 200 according to the second embodiment of the present invention is shown. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and will not be described again.

[0070] Such as Figure 9 As shown, the difference between the audio device 200 according to the second embodiment and the audio device 100 according to the first embodiment is that a flash memory 220 is connected to the bus 18, and a logic circuit part 210 is provided in place of the logic circuit part 110. Between bus 22a and bus 22b. In the audio device 200 according to the second embodiment, as in the first embodiment, under the control of the CPU 10, data obtained from the CD-ROM drive 13 or through the communication interface 15 (such as audio data for reproducing music) ) can be stored in the HDD19, using this method to prevent illegal copying or similar operations. The following wil...

no. 3 example

[0098] Figure 14 It shows a schematic structural diagram of data transmission among the CPU, HDD controller, logic circuit part and HDD of the audio device according to the third embodiment. Such as Figure 14 As shown, the present embodiment is the same as the second embodiment, and its CPU 10 is connected to the HDD 19 through the HDD controller 14 and the logic circuit portion 210 . However, the lines of the bus 22b' connecting the logic circuit portion 210 and the HDD 19 intersect. When data arranged in the order of D0', D1', D2',..., D15' is transferred from logic circuit section 210 to HDD 19, HDD 19 recognizes the received data as D15', D14', D13',..., Data arranged in D0' order. In this way, the data transmitted from the CPU 10 is recorded in the HDD 19 as data whose bit data is different from that of the original data recognized by the CPU 10, and whose arrangement order is also the same as that of the original data. The data is different.

[0099] As described ...

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Abstract

A digital information copy management device includes: a data storage unit, which is configured to store data; a data processing unit, which controls writing data to the data storage unit, and reading data from the data storage unit; a bus , which connects the data storage unit and the data processing unit to transmit data having a plurality of bits in parallel; and a logic circuit unit, which is arranged between the data storage unit and the data processing unit, and It inverts at least one bit of data transmitted in parallel within the bus.

Description

technical field [0001] The present invention relates to an electronic device equipped with a data storage device suitable for storing data, such as video data or music data, whose copying is restricted, and the like. Background technique [0002] In recent years, the capacity of storage devices such as HDDs (Hard Disk Drives) has greatly increased. For example, HDDs having sufficient capacity to store a large amount of content data such as video data and music data have entered the market, and AV devices with HDDs have been developed. [0003] These AV devices can store content data such as videos, music, etc. in their built-in HDDs, as legally purchased. In order to reproduce video or music in response to, for example, a user instruction, the AV device may read specified content data from the HDD, and perform reproduction processing on the video and music according to the read data. [0004] Also, in the case where content data is stored in the built-in HDD of the AV devi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/10G06F12/14G06F13/00H04N5/91
CPCG11B20/00086G11B20/00195G11B20/0021G11B20/00246G11B2220/2516
Inventor 古关齐藤原一伸松山哲哉成泽贞之
Owner YAMAHA CORP
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