HK1107868A - Method of distinguishing optical recording medium and apparatus of the same - Google Patents

Description

Method and apparatus for identifying optical recording medium

Technical Field

The present invention relates to a method for easily identifying counterfeit products on an optical recording medium such as CD-R, DVD + -R and an identification device for the identification.

Background

An optical recording medium such as CD-R, DVD + -R is formed by sequentially forming a dye layer, a reflective layer, and a protective layer (or a single-layer polycarbonate substrate for DVD + -R) on a transparent substrate such as polycarbonate. And recording data on the pigment layer. Since the dye layer has different characteristics and recording conditions depending on the manufacturing company, it is necessary to adjust the recording conditions to the optimum conditions for data recording.

Therefore, in a conventional recording apparatus, a medium ID (maker ID) recorded in advance in an optical recording medium is read, and recording conditions corresponding to the read medium ID are called from a library, thereby recording data. The medium ID is dependent on each manufacturer, and thus recording can be performed with the optimum recording conditions set by the manufacturer.

[ patent document 1 ]: japanese patent laid-open No. 2005-228418

[ patent document 2 ]: japanese laid-open patent publication No. 2002-288827

Disclosure of Invention

The market is now replete with optical recording media that emulate the media ID. Since such counterfeit products differ from the dye layer of the genuine product of the manufacturer in the optimum recording conditions, the characteristics after recording are poor when recording is performed under the recording conditions corresponding to the medium ID recognized by the recording apparatus, and at worst, the recorded data cannot be read. However, in the current identification by the medium ID, since the recording apparatus recognizes the counterfeit as a genuine product, it is difficult to distinguish the genuine product from the counterfeit.

In order to solve the above problems, the present invention provides a method for identifying an optical recording medium and an apparatus for identifying the same, which can easily identify counterfeit products.

The invention provides an identification method of an optical recording medium, which is characterized by comprising the following steps: a first step of reading a medium ID and other attribute data from a reference optical recording medium; a second step of reading a medium ID and other attribute data from the optical recording medium to be identified; a third step of comparing the medium ID of the reference optical recording medium with other attribute data, and the medium ID of the identification target optical recording medium with other attribute data; and a fourth step of displaying the result of the comparison.

The invention also provides an identification method of the optical recording medium, which is characterized by comprising the following steps: the first step or the second step includes a step of storing the medium ID and other attribute data read from the optical recording medium in a memory, and a step of retrieving the medium ID and other attribute data from the memory.

The present invention also provides an apparatus for identifying an optical recording medium, comprising: the method comprises the following steps:

a first reading unit that reads a medium ID and other attribute data from a reference optical recording medium;

a second reading unit that reads the medium ID and other attribute data from the optical recording medium to be identified; a comparison unit that compares the medium ID read by the first reading unit with other attribute data, and the medium ID read by the second reading unit with other attribute data;

and a display unit for displaying the comparison result of the comparison unit.

The present invention also provides an apparatus for identifying an optical recording medium, comprising: the first reading unit and the second reading unit are shared.

According to the present invention, even for a genuine product or a counterfeit product, the medium ID and other attribute data are read from the physical optical recording medium and compared, so that the counterfeit product can be easily identified.

Drawings

FIG. 1 is a functional block diagram of an embodiment of the present invention.

Fig. 2 is a flowchart showing an example of the recognition method of the present invention.

Fig. 3 is a flowchart showing another example of the recognition method of the present invention.

Detailed Description

Fig. 1 is a functional block diagram of an optical recording medium identification device according to an embodiment of the present invention. The recognition device 1 of the present embodiment includes: a first recording/reproducing device 2 corresponding to a first reading means, a second recording/reproducing device 3 corresponding to a second reading means, and a personal computer section 4. In fig. 1, the first recording/reproducing device 2 or the second recording/reproducing device 3 is integrated with the personal computer portion 4, but may be independent of each other. The first recording/reproducing device 2 and the second recording/reproducing device 3 may share the same recording/reproducing device. The personal computer section 4 includes a data recording processing section 44 including a comparison unit, a memory 43 such as a hard disk or a flash memory, a display section 45 such as a display or a printer, and an input section 46 such as a keyboard or a mouse.

The reference optical disc 21 is mounted in the first recording/reproducing device 2, and the identification target optical disc 31 is mounted in the second recording/reproducing device 3. The optical disk used herein includes optical disks such as CD-R, DVD + -R. The optical disc has a structure in which a dye layer, a reflective layer, and a protective layer, which are recording layers, are formed in this order on a transparent substrate such as polycarbonate. The transparent substrate has a groove portion called a groove (groove) and a convex portion called a land (land) located between the grooves, and data is recorded in the groove portion. Also, the DVD-R is further formed with a concave portion called LPP (Land-pre-pit) at the Land portion, and the DVD + R is further formed with a serpentine portion called ADIP (address-in-pre-groove) at the Land portion.

The format of an optical disc includes recording areas called a lead-in area and a lead-out area, in addition to a normal data recording area. In which information about the medium ID and other attribute data is recorded in the lead-in area. Here, the other attribute data is data including recording conditions such as laser output and pulse conditions, and disc information such as a disc format. In DVD ± R, information about a medium ID and other attribute data is also recorded on LPP or ADIP.

Next, the operation of the recognition device 1 of the present invention will be described. The first recording and reproducing apparatus 2 is loaded with a reference optical disc 21 and reads signals recorded in advance in a lead-in area, LPP, ADIP, or the like. The signal read from the first recording/reproducing device 2 is sent to the medium ID detection unit 41 and the other attribute data detection unit 42, converted into a medium ID and other attribute data, and sent to the data recording processing unit 44. The data sent to the data recording processing unit 44 is temporarily stored in the memory 43 or displayed on the display unit 45.

Next, the second recording and reproducing device 3 is loaded with the identification target optical disc 31, and reads out a signal recorded in advance on the optical disc by LPP, ADIP, or the like. Next, the signal read out from the second recording/reproducing device 3 is sent to the medium ID detection unit 41 and the other attribute data detection unit 42, converted into the medium ID and the other attribute data, respectively, and sent to the data recording processing unit 44. The data sent to the data recording processing unit 44 is temporarily stored in the memory 43 or displayed on the display unit 45.

Further, by performing manual input at the input unit 46, product information such as a brand name, a product name, a manufacturer, and a lot number can be appropriately input.

Here, the sequence of data processing in the data recording processing unit 44 will be described with reference to fig. 2 and 3. Fig. 2 is an example of a flowchart of a procedure executed by the data recording processing unit 44. First, the medium ID and other attribute data of the reference optical disc are read from the first reading means (S1). Some of the other attribute data may be read, but it is preferable to read all the data in order to perform comparison with high accuracy. Here, the content of the read data can be displayed on the display unit 45. Further, the product information may be manually input from the input unit 46, and then the data may be read from the optical disk.

Next, the medium ID of the identification target optical disc and other attribute data are read from the second reading means (S2). Here, the content of the read data can be displayed on the display unit 45. Further, the product information may be manually input from the input unit 46, and then the data may be read from the optical disk.

Next, the data of the reference product and the data of the identification target product are compared (S3). First, it is identified whether the media IDs coincide. Then, the other attribute data is compared. And comparing other attribute data according to the items to identify whether the attribute data are consistent or not.

Next, the result of the comparison is displayed on the display unit 45 (S4). When the genuine product was identified as the standard product and the counterfeit product was identified as the identification target product, the results shown in table 1 were obtained as an example.

TABLE 1

	Media ID	Other attribute data
			Disk A to be identified	Uniformity	Inconsistency

Disk B to be identified

Uniformity

Uniformity

Since the counterfeit such as the identification target disc a has different attribute data, the counterfeit can be identified by a method such as comparison with the recording conditions registered in the library of the recording apparatus. This is because the library of the recording apparatus stores the recording conditions for each media ID, that is, for each manufacturer, and even if the media ID of the identification target disc a itself is the same as a genuine product (standard product), for example, the identification target disc a is determined to be a counterfeit product because the recording cannot be performed in the same manner as the genuine product or the recording quality is deteriorated as compared with the genuine product (standard product). However, a counterfeit such as the identification target disk B that is counterfeited with other attribute data cannot be identified by the conventional method. However, in the present invention, since the comparison is performed using the actual disc, counterfeit articles such as the target disc B can be recognized. This is because, although not a product of the company, it is determined whether or not the disc B is a counterfeit by checking whether or not the medium ID of the disc B to be identified matches a genuine product as shown in table 1, and it is determined whether or not attribute data of the genuine product (standard product), that is, whether or not the works of the genuine product (standard product) are counterfeit by comparing other attribute data with the genuine product (standard product).

Next, fig. 3 shows another example of a flowchart of the procedure executed by the data recording processing unit 44. The difference from the flowchart of fig. 2 lies in the following two points: reading data of a reference product (S1), temporarily storing the read data in a memory (S11), and reading the data from the memory when necessary (S12); and reading the data of the identification object (S2), temporarily storing the read data in a memory (S21), and reading the data from the memory (S22) when necessary. In the flowchart of fig. 3, the data is read from the memory for both the reference item and the identification target item, but one of them may be read directly from the actual optical disk.

The first reading unit and the second reading unit may be independent from each other, or may share one reading unit. In this case, after reading the data of the reference item, the data may be read by replacing the disc with the identification target item, or one of the data may be read by reading data stored in advance in the memory, and the other data may be read by the reading means.

In addition, although the genuine product is usually identified as the standard product and the counterfeit product is identified as the identification target product, the counterfeit product may be identified as the standard product and the genuine product may be identified as the identification target product.

Claims (4)

1. A method of identifying an optical recording medium, comprising:

a first step of reading a medium ID and other attribute data from a reference optical recording medium;

a second step of reading a medium ID and other attribute data from the optical recording medium to be identified;

a third step of comparing the medium ID and other attribute data of the reference optical recording medium with the medium ID and other attribute data of the optical recording medium to be identified; and

and a fourth step of displaying the comparison result.

2. An identification method of an optical recording medium according to claim 1, characterized in that:

the first step or the second step includes a step of storing the medium ID and other attribute data read from the optical recording medium in a memory, and a step of retrieving the medium ID and other attribute data from the memory.

3. An apparatus for recognizing an optical recording medium, comprising:

a first reading unit that reads a medium ID and other attribute data from a reference optical recording medium;

a second reading unit that reads the medium ID and other attribute data from the optical recording medium to be identified;

a comparison unit that compares the medium ID and other attribute data read by the first reading unit with the medium ID and other attribute data read by the second reading unit;

and a display unit for displaying the comparison result of the comparison unit.

4. An identification apparatus of an optical recording medium according to claim 3, wherein:

the first reading means and the second reading means are common.