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Digital data copying controlling system and method and CD playback device and storage medium

A copy control, digital data technology, applied in the direction of electrical digital data processing, data recording, image data processing, etc., can solve problems such as easy tampering

Inactive Publication Date: 2005-01-19
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] Although such digital CCI data is included in the digital signal data of the object data of the optical disc, for those who know the structure of the object data, it is easy to tamper with the copy control management data detection and rewriting device, and there is a risk of tampering with the digital CCI data.
In addition, there is a problem that as long as one simulated replication is performed, unlimited generations of replication can be performed afterwards

Method used

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  • Digital data copying controlling system and method and CD playback device and storage medium
  • Digital data copying controlling system and method and CD playback device and storage medium
  • Digital data copying controlling system and method and CD playback device and storage medium

Examples

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Embodiment 1

[0057] FIG. 1 is a schematic view showing playback records of an optical disc duplication control method in Embodiment 1 of the present invention. In this figure, 1 represents a commercially available laminated optical disc, and 2 represents a duplicating optical disc. The commercially available laminated optical disc 1 stores multimedia data such as digital audio signals or digital video signals, and at the same time adds a code to the system stream, and serves as The copy control management information (hereinafter referred to as CCI) is recorded with the first copy control management information of digital CCI (hereinafter referred to as DGCCI) in digital data format and the second copy control management information embedded in analog data format (hereinafter referred to as DGCCI). [Electronic transmission information] or [Watermark information]) two types of copy control management information. Note that details of the water mark information (hereinafter abbreviated as WM...

Embodiment 2

[0092] In the above description, as a recording medium, an optical disk that stores digital audio data or digital video data including copy control management information in the form of electronic clear data (WMCCI) and digital data (DGCCI) has been described as an example. , but the medium for recording and playing the same digital data can also be applied to media such as magnetic tape and semiconductor memory.

[0093] That is, the audio / video storage area storing digital audio data or digital video data including copy control management information in the form of electronic transmission data and digital data has one or more digital data recording media for playback, and copying to other recording media The digital data duplication control method when playing the above-mentioned digital data recording medium, deciphering the code from the output data obtained by the signal processing means, reading the digital duplication control management information, extracting the digita...

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Abstract

The present invention provides a digital data copy control system for playing digital data recording medium including copy control and management information in type of embedding data and type of digital data, At the time of copying to other recording medium, the digital copy control management information is read by decoding cryptography from output data obtained by reproducing the recording medium, data embedding type copy control management information is read from digital audio signals or digital video signals, and the cryptography is detected by a digital audio contents unit or a digital video contents unit, playing control is operated by said digital copy control management information when encrypted, playing control is operated by said data embedding type digital copy control management information when unencrypted.

Description

technical field [0001] The present invention relates to a digital data duplication control system and its method for preventing illegal duplication of content in a storage medium such as an optical disc storing multimedia data including digital video data and digital audio data, and an optical disc playback device. Background technique [0002] In recent years, instead of existing laser discs and video CDs, DVD (Digital Versatile Disc)-Video and DVD-Audio with rapidly increased storage capacity have become popular, and many movie and music CD products have been sold. High-quality digital audio data and digital video data are stored in these standard DVD-Video discs and DVD-Audio discs. Because of the high-quality digital data, AV equipment manufacturers do not transfer the digital signal data due to concerns about illegal digital duplication. Output from the inside of the machine to the outside. If content providers who make and supply movies and music disc products make il...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/85G06F12/14G06F21/10G06F21/60G06F21/62G06T1/00G09C5/00G11B19/02G11B19/04G11B20/00G11B20/10H04N1/387H04N5/91H04N7/08H04N7/081
CPCG11B20/00086G11B20/00884
Inventor 山田二郎
Owner PANASONIC CORP
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