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Recording/reproduction device and method thereof

A reproduction device and storage device technology, applied in recording/reproducing/deleting methods, digital recording/reproducing, encoding/decoding devices, etc., capable of solving complex problems

Inactive Publication Date: 2005-10-05
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, such a device also has the function of allowing the user to connect multiple storage media to it, which leads to further complex situations

Method used

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  • Recording/reproduction device and method thereof
  • Recording/reproduction device and method thereof
  • Recording/reproduction device and method thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0037] FIG. 1 shows the structure of a recording / reproducing apparatus 10 according to the first embodiment. The recording / reproducing device 10 functions as a receiving device for receiving digital broadcasting, a recording device for recording programs (contents) of received digital broadcasting on a storage medium, and a reproducing device for reproducing programs recorded on the storage medium. According to the present embodiment, for example, a detachably mounted hard disk drive (HDD) unit 300 on the recording / reproducing device 10 is used as a storage device including a storage medium.

[0038] When recording video / audio data of a received program (hereinafter simply referred to as "program data") on the removable HDD unit 300, the recording / reproducing apparatus 10 according to the present embodiment uses an encryption key before recording the program data. It is encrypted for copyright protection. The key used to encrypt program data will be referred to as "content ke...

no. 2 example

[0075] FIG. 13 shows the structure of the recording / reproducing apparatus 10 according to the second embodiment. The recording / reproducing apparatus 10 according to the present embodiment includes two removable HDD slots 111 a and 112 b that allow a user to connect two removable HDD units 300 a and 300 b to the recording / reproducing apparatus 10 . Note that other components are the same as those of the recording / reproducing apparatus according to the first embodiment shown in FIG. 1 . According to this embodiment, a PKI security module 200 and a PKI security module 330 are configured, which also allow two security session processes to be performed in parallel. Note that session management unit 103 manages these two secure sessions.

[0076] FIG. 14 shows states and transitions therebetween; each state represents the state of the power supply of the recording / reproducing apparatus 10 shown in FIG. 13 and the detected number of removable HDD units 300 inserted into the removabl...

no. 3 example

[0092] A device that allows a user to connect two removable HDD units 300 to the recording / reproducing device 10 and simultaneously execute three secure session processes will be described in this embodiment. The recording / reproducing device 10 according to the present embodiment has the same structure as the recording / reproducing device 10 according to the second embodiment shown in FIG. 13 .

[0093] FIG. 18 shows an example of transitioning between sessions with respect to the recording / reproducing apparatus 10 according to the present embodiment. When two removable HDD units 300a and 300b are detected (S600), the session management unit 103 establishes a reproduction session for the two removable HDD units 300a and 300b (s602 and S604). At the same time, the session management unit 103 establishes a recording session for the removable HDD unit, one of the two removable HDD units (S606). At this time, the removable HDD unit 300a, which is one of the removable HDD units, en...

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PUM

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Abstract

The present invention provides a recording / reproduction device which allows reproduction with a small delay. The recording / reproduction device encrypts digital contents, and records the encrypted digital contents on a removable HDD unit. At the time of reproduction, the recording / reproduction device decrypts the encrypted digital contents recorded on the removable HDD unit. A contents key for decrypting the digital contents is input / output by executing a series of cryptography input / output processing actions. In the event that the removable HDD unit enters the state wherein the removable HDD unit can be used, the recording / reproduction device executes reproduction session establishment processing including device authentication processing beforehand. In the event that there are any sessions which can be established in parallel for executing cryptography input / output processing, recording session establishment processing is executed. Upon reception of user instructions for reproduction, the recording / reproduction device skips device authentication processing, and executes the subsequent cryptography input / output processing for acquiring the contents key.

Description

technical field [0001] The present invention relates to recording / reproducing technology, and more particularly, to a recording / reproducing apparatus for encrypting and inputting / outputting data to be kept secret, and a method thereof. Background technique [0002] In recent years, it has become increasingly common to handle audio content and video content in the form of digital content. For example, terrestrial digital broadcasting has been proposed. Digital content can be recorded without deteriorating image quality or sound quality, thus significantly improving user convenience. However, this technology that allows users to copy without restriction has led to a series of copyright infringement matters. Therefore, it is necessary to develop an apparatus for recording / reproducing digital content with sufficient consideration of copyright protection. [0003] As a digital content reproduction technology developed in consideration of copyright protection, there has been pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06G09C1/00G11B5/09G11B15/04G11B19/04G11B20/10H04L9/10H04N5/76H04N5/781H04N5/913
CPCH04N21/42669H04N5/781H04N5/913H04N21/4181H04N21/4334H04N21/4405H04N21/4408H04N2005/91364
Inventor 金井雄一
Owner SANYO ELECTRIC CO LTD