KR100261888B1 - Method for processing the user information of a digital video disc recorder - Google Patents

Abstract

PURPOSE: A method for processing user information of a DVDR(Digital Video Disk Recorder) is provided to maintain recording start location data and end location data stored in a memory by using a backup power, even when power is turned off, so as to record the stored data in a UTOC(User's Table Of Contents) area after the power is turned on. CONSTITUTION: A DVDR(Digital Video Disk Recorder) chucks a disk capable of recording, and reads TOC(Table Of Contents) information, then stands by a key inputting. If a recording key signal is inputted, the DVDR sets up a recording mode to store recording start location data and a track number in a memory, then performs a recording of inputted data. If the recording of the data is completed, the DVDR stores end location data in the memory. The DVDR decides whether a recording function is consecutively performed. If so, the DVDR returns to the step of setting up the recording mode. If the recording function is not consecutively performed, the DVDR decides whether power is turned off. If not, the DVDR records the recording start location data and the end location data in a UTOC(User's Table Of Contents) area. If the power is turned off, the DVDR maintains the recording start location and the end location data stored in the memory by using a backup power. The DVDR records the maintained data in the UTOC area.

Description

User Information Processing Method of Digital Video Disc Recorder

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data recording method of a digital video disc recorder, and more particularly, to a method of processing user information of a digital video disc recorder so as to properly record user information indicating a start position and an end position of recorded data. It is about.

With the development of audio and video media, optical disc systems have been developed for recording and reproducing video and audio data on semi-permanent optical discs.

Such an optical disc system reproduces video and audio recorded on an optical disc and outputs it through a screen and a speaker. The optical disk system has a higher signal-to-noise ratio than conventional video and audio playback devices, and thus can reproduce a signal with better image quality and sound quality. In addition, there is a tendency of rapid development and widespread use due to various advantages such as irregular noise and little noise caused by irregular reproduction and modulation, very little distortion, no ghost, and random access.

On the other hand, the optical disc used for such functions as the playback and recording in the optical disc system is a play-only type that allows the user to play information only, such as CD, CD-ROM, and video disc, depending on the function and purpose of recording. Thereafter, the recorded information can be divided into an additional recording type which can be read many times but cannot be erased and rewritten, and an erased rewrite type that can repeatedly record, erase and reproduce the information.

Play-only type CD is already replacing the existing LP record board in the sound industry, CD-ROM which is a medium that can be searched when necessary by recording a large amount of information that needs to be widely spread such as encyclopedia, and recently in Korea Video discs and the like, which are rapidly expanding, have already been put into practical use and are in the dissemination stage.

Additional recordable optical discs can be used for hospitals and large documents that need to store information such as X-rays, NMR-CTs, ultrasound tomography, and patient care cards. There is a tendency that is used for necessary public offices, and mineral maps such as mines and oil fields.

In addition, the erasing rewritable optical disc has a magneto-optical type and a phase change type, and the phase change type is recorded using crystalline / amorphous reversible changes in the process of heating and cooling the micro part of the medium by using a laser, and reflectance difference between the two phases. I am using a method of reading information.

On the other hand, a method for recording data on a magneto-optical optical disc will be described as follows. That is, when the magnetic thin film magnetized in one direction perpendicular to the thin film surface of the optical disk is momentarily heated to near the Curie temperature by the laser focused light pulse, the coercive force of the heated micro part is reduced, whereby the medium magnetization direction Only the laser irradiation part heated by the weak magnetic field applied in the opposite direction to the magnetization direction is reversed, and when the laser pulse is turned off and cooled to room temperature, only this part is left as a stable inverse magnetic domain bit so that information is recorded.

Then, the erasing is performed by heating the portion where the information is recorded by the laser beam, and then restoring the original magnetic direction by applying the direction of the external magnetic field at the time of cooling as opposed to the time of recording.

In addition, reading of the recorded information is performed using a laser light and a polarizer which are weaker than at the time of recording, and when the linearly polarized light is reflected from the surface of the perpendicular magnetized material, the polarization direction is left with respect to the polarization direction of the incident light when the linearly polarized light is reflected from the surface of the perpendicular magnetized material Use the magneto-optical Kerr effect which rotates to the right and to the right, respectively. That is, the polarization direction of the reflected light is rotated counterclockwise when the magnetization direction of the material is downward, and clockwise when it is upward, so that the reflected light passes through the two reflected beams with the analyzer set in advance in a direction that hardly passes the reflected polarization in the unrecorded portion. Then, the reflected light of the unrecorded part has a weak light quantity, and the reflected light of the recorded part passes through the analyzer and is converted into a strong signal of light, which is converted into a digital signal '0' and '1' by using a light detecting element. Will be read.

As described above, a system for recording, erasing, and reproducing the erase rewritable optical disc is commonly referred to as a digital video disk recorder (DVDR).

In the above-described recordable optical disc, a pregroove is formed in a spiral shape in advance, and a land portion is formed between the pregroove and the pregroove, and data can be recorded in the pregroove and the land portion. have. In the pregroove, a sync code or an absolute address is pre-recorded as an FM signal in the form of a wobble, and data can be recorded in an area except for an area in which the sync code or the absolute address is pre-recorded. Possible areas are called program areas.

When recording predetermined data in such a program area, not only the record data but also the user's record information after data recording is completed, that is, information on the recorded data, for example, absolute addresses of start and end positions, and the like. It is recorded in the user's table of contents (UTOC) area allocated to the lead-in area of the disc in accordance with a predetermined sector format, which, like general table of contents (TOC) information, is used when executing a predetermined function such as playback. Through this, the user can smoothly perform functions such as playing back recorded data.

On the other hand, in general, such UTOC information is temporarily stored in a memory at the time of data recording, and is recorded in the UTOC area when data recording is completed, and is used later to execute a predetermined function similarly to TOC information.

However, in recording the UTOC information in the same manner as described above, if the power is turned off due to an external shape before recording the UTOC information on the disk, the UTOC information stored in the memory is lost and recorded in the UTOC area. There was a problem that can not be done.

Accordingly, the present invention has been made to solve such a problem in the related art, and an object of the present invention is to maintain the storage of UTOC information on recorded data even when the digital video disc recorder is turned off when the recording function is executed. The present invention provides a method of processing user information of a digital video disc recorder that enables recording of UTOC information in the UTOC area when the power is turned on.

According to a preferred embodiment of the present invention for achieving this object, a method for processing user's table of contents (UTOC) data representing information of recorded data when executing a recording function in a digital video disc recorder, the digital The video disc recorder has a backup power supply for generating a power supply for backup of the memory storing the UTOC information, and (a) chucking a predetermined recordable disc and reading table of contents (TOC) information and waiting for key input. And (b) setting the recording mode when the recording key signal is input, storing the recording start position data and track number in the memory and performing recording of the input data; and (c) the ending position when data recording is completed. Storing data in memory; and (d) determining whether the write function is to be performed continuously. If the power is turned off in step (d), and if the power is not turned off in step (d), the recording start position data and the end position data stored in the memory are UTOC. Recording in the area, and when the power is turned off, using the backup power to maintain the recording start position and end position data stored in the memory to record the stored start position data and end position data in the UTOC region after the power is turned on. Include.

1 is a schematic block diagram of a digital video disc recorder for implementing the present invention;

2A and 2B are detailed flowcharts showing a user information processing method of a digital video disc recorder according to a preferred embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

5: key input unit 10: microcomputer

15: error correction unit 20: modulation unit

25: recording waveform generating section 30: optical pickup section

35: waveform processing unit 40: FM demodulation unit

45: address demodulation section 50: address calculation section

55: sub code generator 60: memory

65: Backup power supply part

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

1 is a schematic block diagram of a digital video disc recorder for implementing the present invention.

As shown in FIG. 1, a digital video disc recorder for implementing the present invention includes a key input unit 5, a microcomputer 10, an error correcting unit 15, a modulator 20, a recording waveform generator 25, Optical pickup section 30, waveform processing section 35, FM demodulation section 40, address demodulation section 45, address calculation section 50, subcode generation section 55, memory 60, backup power supply section 65 ), A digital signal processor 70, an MPEG decoder 75, an audio signal processor 80, and a video signal processor 85.

The key input unit 5 provides a key signal to the microcomputer 10 to execute a predetermined function input by the user. Then, the microcomputer 10 generates a control signal according to the function key signal input from the key input unit 5 to set the input function mode and execute it.

In addition, the error correction unit 15 detects an error bit from the data to be recorded which is compressed based on the MPEG format and input in the form of a data stream when the recording function is executed, and corrects the error bit to provide it to the modulation unit 20. Subcode generator 55 generates subcodes, i.e., header information, for the record data to the modulator 20 under the control of the microcomputer 10 when the recording function is executed.

On the other hand, when the recording function is executed, the optical pickup unit 30 first reads address information recorded as an FM signal in a wobble form into a pregroove at a position to be recorded on the disk and provides it to the waveform processing unit 35, which will be described later. As described above, data to be recorded provided from the modulator 20 is recorded on the disc, and during reproduction, the data recorded on the disc is read out and provided to the waveform processor 35. FIG.

The waveform processor 35 forms a waveform signal for the address information or data provided from the optical pickup unit 35 and provides the data signal to the digital signal processor 70, and the address information is provided to the FM demodulator 40. To provide. On the other hand, the reproduction signal provided to the digital signal processing unit 70 is processed and output by the audio signal processing unit 80 and the video signal processing unit 85 through the MPEG decoder 75, as is generally known.

On the other hand, the FM demodulator 40 demodulates the waveform-formed address information provided from the waveform processor 35 to the address demodulator 45, and the address demodulator 45 demodulates the address information into an address calculator. The address calculating unit 50 calculates the demodulated address information provided from the address demodulating unit 45 into a substantial address and provides the same to the microcomputer 10.

Then, the microcomputer 50 stores the actual address provided from the address calculating section 50, that is, address data and track number for the start position in the memory 60.

On the other hand, the modulator 20 adds 8-bit data by adding a subcode provided from the sub-code generator 55 (which is recorded as header information) to the record data stream corrected by the error corrector 15. EFM (eight to fourteen modulation) PLUS modulation to convert to bit data is provided, and this is provided to the recording waveform generator 25.

Then, the recording waveform generator 25 converts the waveform into a waveform signal for recording on the disk according to the modulated data provided from the modulator 20 and provides the converted waveform to the optical pickup unit 30.

Accordingly, the optical pickup section 30 records data on the disc based on the waveform signal provided from the recording waveform generation section 25. FIG.

When the data recording is completed through this process and the data recording is completed, the microcomputer 10, as described above, the waveform processor 35, the FM demodulator 40, and the address demodulator as in the recording start position. (45), the address data of the recording end position provided through the address calculating section 50 is stored in the memory 60.

When the operation as described above is completed, the microcomputer 10 generates a control signal to the optical pickup unit 30 and the like, and also modulates the data for the recording start position and end position stored in the memory 60 to the modulator 20. The data is recorded in the UTOC area of the disc through the recording waveform generating section 25 and the optical pickup section 30 by outputting the data.

On the other hand, according to the present invention, when the recording is completed and the power is turned off by an external influence before recording the recording start position data and the end data in the UTOC area, the microcomputer 10 generates a control signal to the backup power supply unit 65 and The power of the backup power supply unit 65 is provided to the memory 60 to maintain the storage of the start position data and the end position data stored in the memory 60 until the power is turned on again.

After that, when the power is turned on again, the microcomputer 10 reads the start position and end position address data stored in the memory 60 to the modulator 20 and generates a control signal to the optical pickup unit 30. This address data is recorded in the UTOC area of the disc as the recording waveform generating section 25 and the optical pickup section 30 are driven.

2A and 2B are detailed flowcharts showing a user information processing method of a digital video disc recorder according to a preferred embodiment of the present invention.

When the recordable disc mounted on the disc tray (not shown) is chucked in step S10, the microcomputer 10 generates a control signal to the optical pickup unit 30 to read TOC data in step S20. After storing the TOC data provided through the waveform processing unit 35 and the digital signal processing unit 70 in the memory 60, the device waits for a key input.

When step S20 is completed, in step S30, it is determined whether the record key signal is input from the key input unit 5. If the record key signal is input in step S30, the flow proceeds to step S40 to set the recording mode. The process proceeds to step S50.

Then, in step S50, the microcomputer 10 reads the recording start position and the track number and stores them in the memory 60. When step S60 is completed, the microcomputer 10 stores the recording data input in step S70 with the optical pickup unit ( 30) is recorded in the program area of the disc.

When the recording of data is executed in step S60, it is determined in step S70 whether the recording of data is completed. If the recording of data is completed in step S70, the flow advances to step S80 to record end position data. To the memory 60.

Thereafter, when step S80 is completed, it is determined in step S90 whether the recording function is executed continuously. That is, for example, it is determined whether the recording of data for one sector or track is completed and the recording of data for another track is executed continuously. If in step S90 the recording function is performed continuously, the step ( Return to S50) to perform the flow again, otherwise proceeds to step S100.

When the process proceeds from step S90 to step S100, step S100 determines whether the power source for driving the digital video disc recorder is turned off. At this time, if the power source is turned off, the process proceeds to step S110. Proceed to S130).

First, when the process proceeds from the step S100 to the step S130, in the step S130, the microcomputer 10 reads the start position data and the end position data stored in the memory 60 and modulator 20 and the recording waveform generator. The recording start position and the end position data provided to the optical pickup section 30 via the 25, and at the same time, generate a control signal to the optical pickup section 30 and provide the optical pickup section 30 to the UTOC area of the disc. End the flow when recording is complete by allowing it to be written to.

In addition, when the process proceeds from step S100 to step S110, the microcomputer 10 generates a control signal to the backup power supply unit 65 in step S110 to provide backup power of the backup power supply unit 65 to the memory 60. As a result, the start position data and the end position data stored in the memory 60 are stored and held, and the flow proceeds to step S120.

Then, in step S120, it is determined whether the power is turned on again. If the power is turned on in step S120, the flow advances to step S130. As described above, the recording start position and the end position data are recorded in the UTOC area of the disk. After writing to the end of the flow.

As described above, the present invention stores the user information on the data recorded when the recording function is executed, that is, the start position data and the end position data are stored in the memory using the backup power even when the power is turned off in recording the UTOC area. By storing the recording start position data and the end position data, there is an effect that these data can be recorded in the UTOC area after the power is turned on again.

Claims (1)

A method for processing user's table of contents (UTOC) data representing information of recorded data when executing a recording function in a digital video disc recorder, The digital video disc recorder has a backup power supply unit 65 for generating a power supply for backup of the memory 60 storing the UTOC information. (A) chucking a predetermined recordable disc, reading table of contents (TOC) information, and waiting for key input; (B) setting a recording mode when a recording key signal is input, storing the recording start position data and track number in a memory and performing recording of the input data; (C) storing end position data in the memory when data recording is completed; (D) determining whether the recording function is to be executed continuously, and if the continuous recording is performed, returning to step (b); otherwise, determining whether the power is turned off; (E) If the power is not turned off in the step (d), the recording start position data and the end position data stored in the memory are recorded in the UTOC area, and if the power is turned off, the recording start position stored in the memory using the backup power and And maintaining the end position data and recording the stored start position data and the end position data in the UTOC area after the power is turned on.

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