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Method of generating data written on optical disc

An optical disc and data technology, which is applied in the recording of information on the magnetic disc, data recording, digital recording/reproduction, etc., can solve the problems of limiting the compatibility of playback devices and not being commercially attractive

Inactive Publication Date: 2011-09-21
H T A HIGH TECH APPL HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The above systems are necessarily limited, either by limiting the strength (and thus, effectiveness) of the copyright protection process employed to guarantee 100% compatibility with all types of audio players, or by intentionally limiting compatibility for specific types of playback devices
Such in-use restrictions may not be commercially attractive

Method used

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  • Method of generating data written on optical disc
  • Method of generating data written on optical disc
  • Method of generating data written on optical disc

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Experimental program
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Embodiment Construction

[0043] Those skilled in the art will understand that part of the data stream on a CD-Audio (Audio CD) is set aside to carry several subcode channels, labeled P, W, R, S, T, U, V and W. Only the P and Q subchannels contain control data for the disc. The Q subchannel can operate in four modes, of which only three (modes 1, 2 and 3) carry active data. When operating in mode 1, the Q sub-channel carries the data of the lead-in area, program area and lead-out area of ​​the disc.

[0044] The Q sub-channel data content in the lead-in area is different from the data in other areas of the disc. In Mode 1, the import data includes the table of contents (TOC) of the disc. The TOC stores data indicating the number of tracks, the start time of each track, and the like.

[0045] refer to figure 1 , shows a process flow diagram of the sequence of operations to generate the edited (TOC).

[0046] First, in step 101, each first track (hereinafter referred to as the "master" track) of the...

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Abstract

An optical disc is disclosed having a set of primary tracks and a set of alternate tracks. At least some of the primary and alternate tracks are associated. When a CD-DA reader accesses the optical disc, it locates only the primary tracks. By contrast, when a data reader such as a CD-Rom drive accesses the disc, modifications to the Table of Contents (TOC) cause the data reader not to access a given primary track but instead to be directed to its associated alternate track. This alternate track may contain audio (CD-DA) data which may or may not correspond with the CD-DA data in the associated primary track. The alternate tracks may be copy protected, and / or may include compressed (not CD-DA) data which is the subject of digital rights management.

Description

technical field [0001] The present invention relates to a method of controlling access to an optical disc, and more particularly, to an access control method when an optical disc is read by an optical disc data reader such as a CD-ROM drive in a personal computer. The invention also relates to access-controlled optical discs. Background technique [0002] All digital turntables (CD audio) are manufactured according to an international standard (IEC International Standard 908, more commonly known to those skilled in the art as Philips TM and Sony TM "Red Book" standard) to manufacture. The standard sets strict parameters for many features, such as the physical size of the disc, the EFM data encoding scheme used, and Reed-Solomon error correction. In contrast, compact disc read only memories (CD-ROMs) are encoded according to a different standard (ISO / IEC International Standard 10149, more commonly known to those skilled in the art as the "Yellow Book" standard). The Yello...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B20/00G11B19/12G11B19/04G11B20/10G11B20/12
CPCG11B20/00086G11B20/00666G11B20/0021G11B19/122G11B20/00152G11B20/00659G11B20/00927G11B20/0063G11B19/04G11B20/00956G11B20/00202G11B20/00557G11B20/00826
Inventor 阿利斯泰尔·约翰·诺克斯阿里·马里纳斯·韦吉南
Owner H T A HIGH TECH APPL HLDG