Pre-recorded compact disc and copy-limit method thereof

Details Pre-recorded compact disc and copy-limit method thereof Pre-recorded compact disc and copy-limit method thereof

2001-11-30

2004-08-31

Edun, Muhammad (Department: 2655)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S059100, C369S059250, C369S053210

Reexamination Certificate

active

06785218

ABSTRACT:

This application incorporates by reference Taiwanese application Serial No. 90113513, Filed Jun. 4, 2001.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates in general to the pre-recorded CD (Compact Disc) and copy-limit method thereof, and more particularly to a copy-limit optical storage medium having an indivisible file with a size bigger than the data area capacity of the CD-R (Compact Disc-Recordable).
2. Description of the Related Art
As the technology blossoms, films, music (audio files) and computer application software can be pre-recorded onto CD (compact disc) by a stamping process to satisfy modern people's need. The pre-recorded CD is light, thin, small and compact enough to carry and possesses large storage capacity. It is convenient to read the pre-recorded CD by simply placing it into a CD-ROM (Compact Disc-Read Only Memory) player. Once the pre-recorded CD was stamped, it cannot be erased and filled with new data. However, users can copy the data from the pre-recorded CD onto a recordable CD for backup by utilizing the computer and CD-R/RW drive. The record able CD includes the CD-R (Compact Disc-Recordable), which is able to record information on the media once, and the CD-RW (Compact Disc-Rewritable), which is able to record information onto the media multiple times.
Referring to
1
A, a structural diagram of a conventional system in which the data recorded on the pre-recorded CD is copied onto a recordable CD is illustrated. As shown in
FIG. 1A
, the pre-recorded CD
102
is placed into the CD-ROM player
104
of the computer
100
. The user may read the file of the pre-recorded CD
102
by utilizing the CD-ROM player
104
. Besides, the recordable CD
106
is placed into the CD-R/RW drive
108
of the computer
100
for copying. The CD-R/RW software package
110
is the controlling interface for communicating the pre-recorded CD
102
in CD-ROM player
104
and the recordable CD
106
in CD-R/RW drive.
Referring to
FIG. 1B
, a diagram shows the allocation of the storage capacity in one session of the pre-recorded CD in FIG.
1
A. The VCD having a film recorded is taken for an example of the pre-recorded CD
102
. As shown in
FIG. 1B
, the X-axis represents the areas in the session of the VCD while the Y-axis shows the storage capacity of each area. The information area of a VCD generally includes a lead-in area
120
, data area
130
, and lead-out area
140
. The lead-in area
120
contains a beginning indicating information so that the CD-ROM player
104
is able to identify the specification of the pre-recorded VCD. The film file is recorded on the data area
130
. The lead-out area
140
contains an ending indicating information so that the CD-ROM player
104
is able to finish reading the pre-recorded CD. Besides, the storage capacity of the data area
130
for a VCD is about 680 MB and the film file size is almost 680 MB as well. When the storage capacities of the lead-in area
120
and lead-out area
140
are both 5 MB, the total storage capacity amounts to 690 MB.
The data area of the recordable CD
106
is used for copying the file of the pre-recorded CD
102
. The copying procedures proceed when the storage capacity of the data area of the recordable CD
106
is larger than the size of the file recorded on the pre-recorded CD
102
. Therefore, the storage capacity of the data area of the recordable CD
106
is designed to be a little larger than the size of the file recorded on the pre-recorded CD
102
for copying. In general, the storage capacity of the data area of the recordable CD
106
is about 700 MB.
Referring to
FIG. 1C
, a flow chart of the procedures for copying the data recorded on the pre-recorded CD onto the recordable CD in
FIG. 1A
is shown. Please also referring to
FIG. 1A
, the pre-recorded CD
102
and the recordable CD
106
are placed into the CD-ROM player
104
and the CD-R/RW drive
108
of the computer
100
respectively. The CD-R/RW software package
110
is the controlling interface for communicating the pre-recorded CD
102
in CD-ROM player
104
and the recordable CD
106
in CD-R/RW drive. At first, in step
180
, the CD-R/RW software package
110
determines whether the storage capacity of the data area of the recordable CD
106
is larger than the size of the file recorded on the pre-recorded CD
102
or not. The next step proceeds if the storage capacity of the data area of the recordable CD
106
is larger than the size of the file recorded on the pre-recorded CD
102
. Otherwise, the procedures end. In step
190
, the CD-R/RW drive
108
proceeds copying the data recorded on the pre-recorded CD onto the recordable CD since the CD-R/RW software package
110
determines the storage capacity of the data area of the recordable CD
106
is larger enough.
However, the pirated CD is easily made by simply copying the data from the pre-recorded CD
102
onto the recordable CD and then sold at a cheaper price than the pre-recorded CD
102
. The piracy and underground dealing might seriously cause damage to the benefit of copyright owner of the pre-recorded CD
102
. Therefore, it has become an essential issue to find a copy-limit solution to protect the software industry and the copyright owner.
SUMMARY OF THE INVENTION
It is therefore an object of the invention to provide a copy-limit pre-recorded CD (Compact Disc) and a copy-limit method capable of protecting the data recorded on the pre-recorded CD from copied onto a recordable CD.
The invention achieves the above-identified objects by providing a pre-recorded CD (Compact Disc) for protecting the data recorded on the pre-recorded CD from copied onto a recordable CD. The storage capacity of a data area of the recordable CD is Z. The pre-recorded CD includes a data area of the pre-recorded CD and an indivisible file. The indivisible file is stored in the data area of the pre-recorded CD and has a file size Y which approximately ranges between Z+10 MB and Z+100 MB.
The invention achieves the above-identified objects by providing a copy-limit method of a pre-recorded CD, for protecting the data recorded on the pre-recorded CD from copied onto a recordable CD. The storage capacity of a data area of the recordable CD is Z. The copy-limit method is as follows: (a) creating an indivisible file with a file size Y which approximately ranges between Z+10 MB and Z+100 MB; and then (b) recording the indivisible file onto a data area of the pre-recorded CD.
Besides, the pre-recorded CD further includes a lead-in area and a lead-out area. The lead-in area contains a beginning indicating information for a CD-ROM player to identify the specification of the pre-recorded CD and the lead-out area contains an ending indicating information for the CD-ROM player to finish reading the pre-recorded CD. Besides, the beginning indicating information has a variable sized recording indication for differentiating the storage capacity of the data area of the recordable CD and the size of the file recorded on the pre-recorded CD. The CD-R/RW software package reads the beginning indicating information of the pre-recorded CD and obtains a variable sized recording indication. The CD-R/RW software package therefore determines the storage capacity of the data area of the recordable CD is larger than the size of the file recorded on the pre-recorded CD according to the variable sized recording indication.
The information area of a VCD includes a lead-in area
220
, data area
230
, and lead-out area
240
. The lead-in area
220
contains a beginning indicating information so that the CD-ROM player
104
in
FIG. 2A
is able to identify the specification of the pre-recorded VCD.
What needs to be noticed is that there is a variable sized recording indication for differentiating the storage capacity of the data area of the recordable CD
106
and the size of the file recorded on the pre-recorded CD
202
. While reading the variable sized recording indication, the CD-R/RW software package then determines the storage capacity of the data area of the record

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