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Video/audio frequency information reading, recording, reproducing apparatus and method

A technology for information reading and information recording, applied in optical recording/reproduction/erasing methods, information storage, data recording, etc., which can solve the problems of not establishing a copyright protection system, not being able to ensure sufficient protection, and increasing processing loads

Inactive Publication Date: 2009-04-08
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] As mentioned above, they have the following problems: no proper copyright protection system is established in the recordable DVD; Adequate protection; increases processing load and cost due to digitally watermarked information

Method used

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  • Video/audio frequency information reading, recording, reproducing apparatus and method
  • Video/audio frequency information reading, recording, reproducing apparatus and method
  • Video/audio frequency information reading, recording, reproducing apparatus and method

Examples

Experimental program
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Embodiment Construction

[0051] FIG. 1 is a diagram showing the structure of a DVD drive 100, ie, an information recording / reproducing apparatus, according to an embodiment of the present invention.

[0052] The DVD drive 100 is capable of reading data from and writing data into a DVD disc 1 (hereinafter referred to as "disc 1").

[0053] Disc 1 includes DVD-Video discs (DVD-ROM) protected according to CSS regulations, DVD-Video discs not protected according to CSS regulations (DVD-ROM / -R / -RW / +R / +RW), user-created disks and duplicate disks licensed for private use.

[0054] The optical pickup unit 2 (hereinafter referred to as OP) includes an objective lens, a device for driving the objective lens in biaxial directions, a laser diode, a photodetector, and an OP feeding mechanism.

[0055] The spindle motor 3 applies rotational drive to the optical disc 1 .

[0056] The writing processor 4 controls the writing laser power on the optical disc 1 according to the DVD encoded EFM+ (Eight to Fourteen Modu...

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PUM

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Abstract

A mask function that replaces at least part of information, such as video data, audio data, and sub-picture data, with invalid data is provided in an information recording / reproducing apparatus. Both of a personal computer (PC) and the information recording / reproducing apparatus are provided with features in which the information is encrypted on a sending end, exchanged between the sending end and a receiving end, and decrypted on the receiving end. Authentication is performed between the PC and the information recording / reproducing apparatus: when the authentication succeeds, the information is transferred from one end where the information is encrypted to the other end where the information is decrypted; when the authentication fails, the information recording / reproducing apparatus applies the mask function to the information read from a storage medium or to the information to be written transferred from the PC to the storage medium.

Description

technical field [0001] The present invention relates to an information reading device for reading information from a storage medium such as an optical disc, an information recording device for recording information into a storage medium, and an information reading and recording method. Background technique [0002] In a storage medium such as a DVD (Digital Versatile Disc), a large amount of information such as an entire feature film including a large number of moving images and audio can be stored as digital information. Because it can save moving images and audio as digital information, copyright protection against piracy has become more and more important. [0003] CSS (Content Scrambling System) is a copyright protection technology used by DVD-Video. CSS can only be applied to DVD-ROM, and according to the CSS contract: it is forbidden to apply CSS to readable DVDs such as DVD-R, DVD-RW, DVD+R and DVD+RW. Therefore, bit-by-bit copying from DVD-Video to any of the afore...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B20/10H04N5/91G06F12/14G11B20/00H04L9/08H04L9/32H04N5/765H04N5/85H04N5/913H04N9/804
CPCG11B20/00449G11B20/00086H04N5/85H04N2005/91342H04N2005/91364G11B20/0021G11B20/00188G11B20/00586G11B20/00507H04N9/8042G11B20/00224H04N5/765H04N5/913G11B20/00195G11B20/00818G11B7/004
Inventor 木谷聪
Owner SONY CORP