KR20040099528A - Method and apparatus for recording and reproducing data and recording medium for recording programs for realizing the same - Google Patents

Abstract

PURPOSE: A data recording and reproducing method, a data recording and reproducing device, and a recording medium for recording a program for realizing the method and the device are provided to modulate additional information data by using a modulation code used for recording user data, thereby forming a wobbling groove which displays the additional information data without using another modulation device. CONSTITUTION: A system receives user data and additional information data, and generates a modulation signal by using the same modulation code(410). The system receives the modulated user data and the additional information data, and creates NRZI(Non-Return to Zero Inverted) signals corresponding to the user data and the additional information data(420). The system records an NRZI signal of the user data according to the first recording method while recording an NRZI signal of the additional information data according to the second recording method(430).

Description

A method of recording and reproducing data, a device for recording and reproducing data, and a recording medium recording a program for realizing the same.Method and apparatus for recording and reproducing data and recording medium for recording programs for realizing the same

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recording and reproducing user data and additional information data, a recording medium having recorded thereon a program for implementing the same, and an apparatus for recording and reproducing such data. The present invention relates to a method for recording and reproducing additional information data including address information and other information in a wobble form in a disc lead-in area, a recording medium recording a program therefor, and a recording and reproducing apparatus for these data. .

The address information of an initial disc-shaped recording medium such as a compact disc (CD) was recorded in a pit form on the disc track in front of the data to be stored.

On the other hand, recently, a method of recording address information by wobbling modulation of address information and disk-related information to generate a wobble signal and then shaping the track of the disc into the same shape as the wobble signal is used. Examples of wobble modulation include monotone wobble (MW), saw tooth wobble (STW), binary phase shift keying (BPSK), and frequency shift keying (FSK).

FIG. 1 is a diagram for describing a wobbling address generation device that generates a wobbling signal for wobbling conventional address information. The wobbling address generator 100 of FIG. 1 includes a frequency generator 110, a first divider 120, a biphase modulation unit 130, a second divider 140, and a frequency modulation. The unit 150 is included.

The frequency generator 110 generates a frequency signal of 372.4 khz and outputs the frequency signal to the first divider 120 and the second divider 140. The first divider 120 divides the frequency signal of 372.4 khz output from the frequency generator 110 by 15 to generate a 24.8 khz biphase clock signal, and then outputs the biphase clock signal to the biphase modulator 130. do. The biphasic modulation unit 130 receives ADIP data, for example, address data, received from an address in pre-groove (ADIP) data generation unit (not shown), to the biphasic clock signal received from the first divider 120. After the bi-phase modulation, it is output to the frequency modulation circuit 150. The second divider 140 divides the frequency signal from the frequency generator 110 by 372.4 khz by 4, generates a carrier signal of 93.1 khz, and then outputs it to the frequency modulator 150. The frequency modulator 150 generates a wobble signal using the biphase modulated signal input from the biphase modulator 130 and the carrier signal input from the second divider 140.

A wobbling address generation apparatus using the bi-phase modulation scheme as described above is disclosed in Korean Laid-Open Patent Publication No. 1999-014335.

As described above, a conventional modulation device is required to record additional information such as address information and disk related information in a wobble form on the optical disk in addition to the user data, and separately when a user wants to reproduce the recorded additional information. There was a problem in that a demodulation device was needed.

SUMMARY OF THE INVENTION A technical problem to be solved by the present invention to solve the above problems is a data recording method for recording additional information such as address information and disk related information in a wobble form on a disc-shaped recording medium without adding a separate modulation device. And providing the apparatus.

Another object of the present invention is to provide a data reproducing method and apparatus capable of reproducing additional information such as address information and disc-related information recorded in a wobble form on an optical disc without adding a separate demodulation device. To provide.

1 is a view for explaining a conventional wobbling address generation device

2 is a block diagram illustrating an apparatus for recording user data and additional information data according to an embodiment of the present invention.

3A and 3B show pit and wobbling grooves represented by the same modulation code for explaining the present invention.

4 is a flowchart illustrating a method of recording user data and additional information data according to an embodiment of the present invention.

5 is a block diagram illustrating an apparatus for reproducing user data and additional information data according to an exemplary embodiment.

6 is a flowchart illustrating a method of reproducing user data and additional information data according to an embodiment of the present invention.

In order to achieve the above object, a method of recording user data and additional information data on a disc-shaped recording medium according to the present invention comprises the steps of: modulating the user data and the additional information data using the same modulation code; Recording the modulated user data according to a first recording scheme; Recording the modulated side information data according to a second recording scheme.

According to an aspect of the present invention, a method of recording user data and additional information data further includes generating an NRZI signal corresponding to the modulated user data and additional information data. The magnitude of the NRZI signal is an integer multiple of the channel clock length used for the user data.

The problem is also achieved by a computer readable recording medium having recorded thereon a program for realizing the user data and additional information data recording method.

In order to achieve the above object, a data recording apparatus for recording user data and additional information data on a disc-shaped recording medium according to the present invention comprises: a modulator for modulating the user data and the additional information data according to a predetermined modulation code; A first recording unit for recording the modulated user data according to a first recording method; And a second recording unit for recording the modulated additional information data according to a second recording method.

A data recording apparatus for recording user data and additional information data in a more preferable disc-shaped recording medium according to the present invention for achieving the above object further includes an NRZI converter for generating an NRZI signal corresponding to the modulated additional information data; The magnitude of the NRZI signal of the generated additional information data is an integer multiple of the channel clock length used for the user data.

A reproduction method for reproducing user data and additional information data from a disc-type recording medium in which user data and additional information data modulated with the same modulation code according to the present invention for achieving the above object is achieved in the first recording method. Reading the user data recorded with the data and the additional information data recorded with the second recording method; Generating demodulated user data and additional information data using the same demodulation code for the read user data and additional information data.

The problem is also achieved by a computer readable recording medium having recorded thereon a program for realizing the user data and additional information reproducing method.

A reproduction apparatus for reproducing user data and additional information data from a disc-shaped recording medium on which user data and additional information data modulated with the same modulation code according to the present invention for achieving the above object is provided in the recording medium. A reading unit which reads the user data recorded with the data and the additional information data recorded with the second recording method; And a demodulator for generating demodulated user data and additional information data using the same demodulation code for the read user data and additional information data.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

Hereinafter, the configuration and operation of the user data and additional information data recording apparatus according to the present invention will be described with reference to FIGS. 2 and 3 (a) and (b).

2 is a block diagram illustrating an embodiment of a recording apparatus according to the present invention, and includes a modulator 210, a non return to zero inverted (NRZI) converter 220, a first recorder 230, and a second recorder ( 240).

The modulator 210 receives user data and additional information data and generates a modulated signal using the same modulation code. For example, modulation is performed using modulation codes such as weight to fourteen modulation (EMF), EFMPlus, and parity preserving code, and the modulated user data and additional information data are transferred to the NRZI converter 220. Output Here, the additional information data includes disc related information such as address information and copyright information for disc access, disc manufacturer information, record related information, identification information indicating a disc type, laser power information, disc rotation speed information, and the like. Include.

The NRZI converter 220 receives the modulated user data, generates an NRZI signal, outputs the NRZI signal to the first recording unit 230, and receives the modulated additional information data, and an integer multiple of the channel clock length T used for the user data. Generates an NRZI signal and outputs the same to the second recording unit 240. For example, when the modulation code used in the modulator 230 is a parity preservation code of RLL (1,7), if the channel clock length of the first recording method is T, the NRZI signal of the second recording method is determined. The length is 16T, 24T, 32T, 40T, 48T, 56T, 64T, 72T. The size of the NRZI signal of the additional information data is an integer multiple of the clock length used in the user data modulation scheme in order to prevent the data detection rate from being degraded as the additional information data is modulated by the user data modulation scheme.

The first recording unit 230 forms a pit on the track of the disk 250 according to the NRZI signal of the user data input from the NRZI conversion unit 230 as shown in FIG.

The second recording unit 240, on the track of the lead-in area of the disc 250 in accordance with the NRZI signal of the additional information data input from the NRZI converter 230, as shown in FIG. to form a wobbling groove).

3 (a) and 3 (b) are diagrams showing a wobbling groove for indicating additional information represented by the same modulation code and a pit for indicating user data.

FIG. 4 is a flowchart showing an embodiment of a method for recording user data and additional information data according to the present invention, which is performed in the user data and additional information data recording apparatus shown in FIG.

In step 410, the user data and the additional information data are input to generate a modulated signal using the same modulation code. For example, modulation is performed using modulation codes such as weight to fourteen modulation (EMF), EFMPlus, parity preserving code, and the like.

In operation 420, the modulated user data and the additional information data are input to generate an NRZI signal corresponding to the user data and the additional information data. Here, the NRZI signal of the side information data is an integer multiple of the channel clock length T used for the user data.

In step 430, the NRZI signal of the user data generated in step 420 is recorded according to the first recording method, and the NRZI signal of the additional information data is recorded according to the second recording method. Here, the first recording method is a method of recording by forming pits on the tracks of the disc as shown in Fig. 3A. Further, the second recording method is a recording method in which a wobbling groove is formed on the track of the lead-in area of the disc as shown in Fig. 3B.

Hereinafter, an embodiment of a user data and additional information data reproducing apparatus modulated and recorded with the same modulation code according to the present invention will be described with reference to FIG.

FIG. 5 is a block diagram illustrating an apparatus for reproducing user data and additional information data according to the present invention, which includes an optical disk 510, a reading unit 520, an inverse NRZI converter 530, and a demodulator 540. FIG. do.

The user data and additional information data reproduction apparatus according to the present invention shown in FIG. 5 is modulated and recorded with the same modulation code by the user data and additional information data recording apparatus according to the present invention shown in FIG. Read and play data.

The reading unit 520 reads the user data recorded in the pit form and the additional information data recorded in the wobble form from the disc 510 by an optical pickup (not shown) having an optical head, thereby inverting the NRZI converter 530. )

The inverse NRZI converter 530 converts the user data and the additional information data input from the reader 520 into the demodulator 540 after inverse NRZI conversion.

The demodulator 540 demodulates the user data and the additional information data input from the inverse NRZI converter 530 using the same demodulation code, and outputs the user data and the additional information data.

FIG. 6 is a flowchart illustrating an embodiment of a method of reproducing user data and additional information data according to the present invention, which is performed by the apparatus for reproducing user data and additional information data according to the present invention shown in FIG. 5.

In step 610, user data recorded in a pit form and additional information data recorded in a wobble form are read from the disc.

In step 620, the user data and the additional information data read in step 610 are reverse NRZI converted.

In step 630, the same demodulation code is demodulated and output after the inverse NRZI transformed user data and the additional information data in step 620.

The invention can also be embodied as computer readable code on a computer readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disks, optical data storage devices, and the like, and may also be implemented in the form of a carrier wave (for example, transmission over the Internet). It includes being. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

As described above, the user data and the additional information data recording method and the apparatus according to the present invention modulate the additional information data by using a modulation code used when recording the user data so that address information is not used without using a separate modulation device. There is an effect that it is possible to form a wobbling groove for expressing additional information data including other information.

In addition, the method and apparatus for reproducing user data and additional information data according to the present invention enable the demodulation code to be demodulated using a demodulation code used for recording user data so that the additional information data can be used without using a separate demodulation device. There is an effect that it is possible to play.

Claims (28)

A data recording method for recording user data and additional information data on a disc shaped recording medium, Modulating the user data and the side information data using the same modulation code; Recording the modulated user data according to a first recording scheme; And recording the modulated additional information data according to a second recording method. The method of claim 1, The additional information includes at least one of address data used for disk access, copyright information, identification information indicating a disc type, information on laser power, and information on a disk rotation speed. Recording method. The method of claim 1, Generating a nonreturnto zero inverted (NRZI) signal corresponding to the modulated user data and additional information data; And the magnitude of the NRZI signal of the generated additional information data is an integer multiple of the channel clock length used for the user data. The method of claim 1, And the first recording method is a recording method for forming pits on a disc track. The method of claim 1, And the second recording method is a recording method for generating a wobbling spiral track on a disc. The method of claim 1, And the modulation code is one of eight to fourteen modulation (EMF), EFMPlus, or parity preserving code. The method of claim 1, And the user data is video and / or audio data. The method of claim 3, The modulation code is a parity preservation code of RLL (1,7), the channel clock length of the first recording method is T, and the NRZI signal length of the second recording method is 16T, 24T, 32T, 40T, 48T, 56T. , 64T, 72T. A data recording apparatus for recording user data and additional information data on a disc shaped recording medium, A modulator for modulating the user data and the side information data according to the same modulation code; A first recording unit for recording the modulated user data according to a first recording method; And a second recording unit for recording the modulated additional information data according to a second recording method. The method of claim 9, And the additional information includes at least one of address data used for disk access, copyright information, identification information indicating a disc type, information on laser power, and information on a disk rotation speed. The method of claim 9, And an NRZI converter configured to generate an NRZI signal corresponding to the modulated additional information data. And the magnitude of the NRZI signal of the generated additional information data is an integer multiple of the channel clock length used for the user data. The method of claim 9, And the first recording method is a recording method for forming pits on a disc track. The method of claim 9, And the second recording method is a recording method for generating a spiral track wobbling on a disc. The method of claim 9, And the modulation code is one of an EFM, an EFMPlus, or a parity preservation code. The method of claim 9, And the user data is video and / or audio data. The method of claim 11, The modulation code is a parity preservation code of RLL (1,7), the channel clock length of the first recording method is T, and the NRZI signal length of the second recording method is 16T, 24T, 32T, 40T, 48T, 56T. And 64T, 72T. A reproduction method for reproducing user data and additional information data from a disc-shaped recording medium on which user data and additional information data modulated with the same modulation code are recorded, Reading user data recorded on the recording medium in a first recording manner and additional information data recorded in a second recording manner; Generating demodulated user data and additional information data using the same demodulation code for the read user data and the additional information data. The method of claim 17, And the additional information data includes at least one of address data used for disc access, copyright information, identification information indicating a disc type, information on laser power, and information on a disc rotation speed. The method of claim 17, And performing inverse NRZI conversion on the read user data and the additional information data. The method of claim 17, The first recording method is a recording method for recording data in a pit form on a disc track, and the second recording method is a recording method for recording in a wobble form on a disc. The method of claim 17, The user data is video and / or audio data. A reproduction apparatus for reproducing user data and additional information data from a disc-shaped recording medium on which user data and additional information data modulated with the same modulation code are recorded, A reading unit for reading user data recorded in the first recording method and additional information data recorded in the second recording method onto the recording medium; And a demodulator for generating demodulated user data and additional information data using the same demodulation code for the read user data and additional information data. The method of claim 22, And the additional information data includes at least one of address data used for disk access, copyright information, identification information indicating a disc type, information on laser power, and information on a disk rotation speed. The method of claim 22, And an inverse NRZI conversion unit for performing inverse NRZI conversion on the read user data and the additional information data. The method of claim 22, And wherein the first recording method is a method of recording data in a pit form on a disc track, and the second recording method is a method of recording data in a wobble form on a disc. The method of claim 22, And the user data is video and / or audio data. A computer-readable recording medium having recorded thereon a program for realizing the method for recording user data and additional information data according to any one of claims 1 to 8. A computer-readable recording medium having recorded thereon a program for realizing the method for reproducing the user data and additional information according to any one of claims 17 to 21.