KR19990070926A - Apparatus and method for accessing heading information in a data backup system - Google Patents

Abstract

The present invention selectively records the heading information for each of the backup data in a control track that is in the same line as the video track and audio track in which the respective backup data is recorded with the heading information recording mode selected, and reads the heading information. And a title information access device and method of a data backup system for acquiring and displaying title information of backup data recorded in a video track and an audio track on the same line as reading title information recorded in the control track with a mode selected. It is about.

According to the present invention, the user can list the heading information for each of the backup data displayed, thereby not only grasping the entire backup data recorded on the videotape, but also at the point where the desired heading information is displayed. By playing the video tape in the normal mode, there is an advantage that the desired backup data can be easily searched and played.

Description

Apparatus and method for accessing heading information in a data backup system

The present invention relates to an apparatus and method for accessing title information of a data backup system, and more particularly to a host by recording an index of title information such as a video tape number and corresponding stored file names in a control track. A title information access apparatus and method of a data backup system designed to quickly search and understand the overall file name of backup data of a videotape on a computer side.

Recently, with the development of personal computer technology, many changes have occurred in the memory device for storing data of the personal computer. Generally, floppy disks and hard disks are widely used as storage devices for personal computers. Hard disks have a general storage capacity of 1.2GB, 2.1GB, 3.2GB, 4.6GB, etc., which are much larger than other storage devices, but are easily damaged by electric shock or physical shock.

In general, one hard disk is used for a personal computer, and thus, it is necessary to regularly store the data of the hard disk in a separate auxiliary memory device to protect the data contained in the hard disk from accident. In the meantime, there have been a tape driver, an optical disk, and the like, which apply a magnetic recording method, but the auxiliary storage device is required because it is relatively expensive.

In general, a video tape recorder is conventionally designed to access a video signal and an audio signal to a video tape, which is a magnetic recording medium, and does not have a separate data storage function. As used herein, the term access refers to a process of recording (or storing) signals or data on a recording medium or reproducing (or reading) already recorded signals or data from a recording medium.

However, the medium and large sized computers or workstation class computers often use external devices such as a tape driver based on a recording method for data backup. Research into devices capable of backing up digital data is making a lot of progress.

This has led to the development of a video tape recorder data backup device that can now back up digital data from a host computer to video tape using a widely available video tape recorder (hereinafter referred to as a "VTR"). It is.

1 is a block diagram showing the configuration of a video tape data backup device of Danmere Limited, UK.

Danmere Limited of the United Kingdom has released an external video tape recorder data backup device called "Backer 32" as a PC Tape Backup System for personal computers. Let's look at this in more detail to help.

In order to configure a data backup system using "Backer 32", an external backup module 20 having a model name DANP100B should be provided. In addition, in order to connect the external backup module 20 to the video tape recorder (or camcorder) 200, an input / output connector of the video tape recorder 200 is used, and the personal computer 100 is used. In order to drive the external backup module 20, the backer software (Backer software) provided by DANMER must be installed.

The external backup module 20 receives the backup data from the parallel communication port 10 (ie, the printer output terminal) of the personal computer 100, and adds a horizontal sync signal and a vertical sync signal to the composite video signal. After the conversion to the form of the video tape recorder 200 through the input connector to the video tape recorder 200.

Thereafter, the video tape recorder 200 records a backup composite video signal, which is a composite video signal input from the external backup module 20, on the video tape in the same manner as the actual composite video signal.

In short, the pseudo video signal obtained by converting the backup data is recorded and reproduced in the same manner as the actual video signal input from the outside.

This allows users to create templates of files to be copied to videotape via a graphical user interface, which can optionally create multiple directories as well as entire hard disks, directories, files, etc. You can also optionally include it.

Danmere's backer 32, on the other hand, allows users to easily restore files recorded on videotape or data on an entire hard disk. For example, you can open this template to restore all files recorded in an arbitrary template, and then simply click on the top-level directory to restore it. After importing, it's designed to do this simply by selecting the file you want to restore with your mouse.

If the backer 32 wants to find independent files recorded on the videotape, it finds a numerical reference to the file from the template and then uses the videotape recorder 200 to find the reference number. You can solve this by playing it back.

Alternatively, you can use the tape progress bars provided by the backer software to indicate the location of the file, which indicates the tape location at the current point and the location of the selected file on the tape.

Storage capacities vary depending on the operating mode, which includes mode 1 and mode 2, which are 9 megabytes per minute and 4 megabytes per minute, respectively. Can record 2 gigabytes (2 GigaByte) and 1 gigabyte (1 GigaByte) of data on a single video tape, respectively, when the recording capability is based on a 2-hour video tape. have.

The data backup system used in the present invention is configured to record the data of the host computer on such a recording medium of the VTR. For more details, see Korean Patent Application No. 97-54348, Video Tape, filed by the applicant of the present invention. The technique is disclosed in detail in the recorder data backup apparatus and method.

In general, a backup system using a video tape recorder generally does not have a separate index function for title information on a video tape. Just write the template information in the header area of the backup data to create a template for the data recorded on the videotape.

Therefore, in order to know what backup data is recorded on the video tape, the most common method is to obtain the approximate information through the title printed on the outer surface of the cassette of the video tape.

However, if the heading information is not printed or is very outlined, it is common to identify specific backup data by loading the videotape into the deck in the first way and reading the template information.

However, when trying to identify the backup data of the videotape through the former method, it was cumbersome to record the title information on the outside of the videotape cassette whenever each backup data was recorded. If you wanted to know the backup data, it was inconvenient to spend a lot of time for this.

Accordingly, the present invention has been devised to solve such inconveniences, and the number of video tapes and the number of video tapes in a control track co-existing with the video track and audio track of the video tape on which each backup data is recorded. After recording an index of heading information such as the corresponding stored file names, and performing video tape loading, it is sent to the host computer to retrieve and display the heading information recorded in memory corresponding to this index, so that the video on the host computer side can be displayed. An object of the present invention is to provide an apparatus and method for accessing title information of a data backup system, which is designed to quickly search and understand the overall file name of backup data of a tape.

1 is a configuration diagram showing the configuration of a video tape data backup apparatus of Danmere Corporation of the United Kingdom;

2 is a block diagram showing a preferred embodiment of a video tape recorder data backup system according to the present invention;

3 is a flowchart illustrating a procedure of a data recording method of a video tape recorder data backup system according to the present invention;

4 is an exemplary diagram illustrating an example of adding a horizontal synchronization signal to a bit stream of digital data;

5 is an exemplary view schematically showing a loading mechanism of a video tape recorder according to a VHS scheme along a running path of a tape.

6 is a block diagram showing a preferred embodiment of the heading information access device of the data backup system according to the present invention;

7 is a flowchart illustrating a preferred embodiment of a method for accessing title information of a data backup system according to the present invention.

Explanation of symbols for the main parts of the drawings

13b: control head 20: video tape

310: title information encoding unit 320: title information code recording unit

330: title information code reading unit 340: title information obtaining unit

350: character memory 360: character data output unit

370: OSD signal generator 380: user input unit

390: title information access control unit

In order to achieve the above object, a title information access device of a data backup system according to the present invention is a data backup system in which digital data of a host computer can be recorded / reproduced on a video tape as backup data in a composite video signal format. A heading information encoding section for generating heading information codes by encoding heading information for each backup data while the operation mode is selected in the heading information recording mode for recording heading information on the videotape; A title information code recording section for selectively recording the title information code through the control head on a control track co-ordinated with the video track and the audio track of the video tape on which the respective backup data is recorded; A title information code reading section for reading the title information code from the control track through the control head while the operation mode is selected as a title information reading mode for reading the title information; And a title information obtaining unit for decoding title information codes inputted from the title information code reading unit to obtain title information of backup data recorded on video tracks and audio tracks collinear with the control track.

Here, the heading information access device of the data backup system according to the present invention comprises: a heading information converting unit converting the heading information obtained by the heading information obtaining unit into data for transmission to a host computer; And a title to provide title information for each backup data created from the host computer to the title information encoding unit, and to perform access control on the title information to receive the output of the title information converting unit and provide the output to the host computer. It is preferable to further include an information access control unit. In addition, the character data output unit for receiving the respective heading information obtained by the heading information acquisition unit for reading and outputting a character corresponding to the heading information in the character memory for storing the character; And a signal generator configured to generate a signal for receiving and displaying text data from the text data output unit.

Optionally, the apparatus further includes a user input unit for selecting the operation mode and inputting the title information.

On the other hand, the title information access method of the data backup system according to the present invention is a data backup method in which digital data of a host computer can be recorded / reproduced on a video tape as backup data in the form of a composite video signal. And a title information recording mode selecting step of selecting a title information recording mode for recording title information for the backup data when recording the backup data on at least one of the video tracks. A title information recording step of selectively recording title information for each of the backup data in a control track present on the same line as the video track and audio track in which the respective backup data is recorded when the title information recording mode is selected; A heading information reading mode selection step of selecting a heading information reading mode for reading heading information for each backup data; And a title information acquiring step of acquiring title information of backup data recorded in a video track and an audio track on the same line as the title information recorded in the control track is read while the title information reading mode is selected. to be.

Preferably, the method for accessing title information of the data backup system according to the present invention further includes an on-screen display step of on-screen displaying text data corresponding to the title information read out by the control track.

In another aspect of the apparatus and method of the present invention, the title information preferably includes at least one of a file name, a file size, a subtitle, and a recording date and time related to the backup data.

Hereinafter, a preferred embodiment of an apparatus and method for accessing title information of a data backup system according to the present invention will be described with reference to the accompanying drawings.

In the following description, in order to avoid confusion about terminology, data recorded on video tracks and audio tracks of videotape will be referred to as the general term "backup data", and the file name, file size, Backup data additional information such as subtitle and recording date and time will be referred to as "title information".

Hereinafter, an example of a video tape recorder data backup system according to the present invention will be described with reference to the accompanying drawings.

2 is a block diagram showing a preferred embodiment of a video tape recorder data backup system according to the present invention, and FIG. 3 is a flowchart illustrating the procedure of a data recording method of the video tape recorder data backup system according to the present invention. 4 is an exemplary diagram illustrating an example of adding a horizontal synchronization signal to a bit stream of digital data.

The data backup apparatus 200 receives digital data from the host computer 100 through a communication port 210 connected to the host computer 100 through a communication cable 110 to provide electrical connection, and converts a backup composite image. The unit 220 generates a backup composite video signal by adding a horizontal sync signal and a vertical sync signal to the composite video signal by matching the timing with the bit stream of the digital data, and converts the backup composite video signal into a predetermined magnetic access method. The video tape 300 can be accessed based on the above.

4 illustrates an example of adding a horizontal synchronizing signal to a bit stream of digital data, and adds a horizontal synchronizing signal and a vertical synchronizing signal having a constant horizontal synchronizing period and a vertical synchronizing period, respectively, in timing with the bit stream of digital data. To generate a backup composite video signal.

The input signal switching unit 230 is coupled to the backup composite video signal converter 220 and the input connector 201 of the video tape recorder, and receives the backup composite video signal and the video tape recorder from the backup composite video signal converter 220. The actual composite video signal input through the input connector 201 of the 200 is selectively switched according to the selection control signal applied from the signal switching control unit 280 to be described later and output.

Thereafter, the composite image signal recording unit 240 receives the output of the input signal switching unit 230 and records the video signal on the video tape 300 based on a predetermined magnetic recording method.

As a result, when the operation mode determined by the combination of the selection control signals applied to the input signal switching unit 230 is a data backup mode for recording the digital data of the host computer 100 on the video tape 300, the composite image. The recording unit 240 records the backup composite video signal on the video tape 300, and records the actual composite video signal on the video tape 300 or reproduces the actual composite video signal recorded on the video tape 300. In the normal access mode, the composite image recording unit 240 records the actual composite image signal on the video tape 300.

Meanwhile, the composite video signal reproducing unit 250 reproduces the composite video signal from the video tape 300 based on a predetermined reproduction method.

The output signal switching unit 260 is connected to the composite video signal reproducing unit 250 to selectively switch the output of the composite video signal reproducing unit 250 according to a user's selection control signal.

Subsequently, the backup composite image inverse transform unit 270 receives the output of the output signal switching unit 260 and inversely converts the digital data into digital data by removing the horizontal synchronizing signal and the vertical synchronizing signal, thereby transmitting the host computer 100 through the communication port 210. Will output

Similar to the case of the input signal switching unit 230, if the operation mode determined by the combination of the selection control signal applied to the output signal switching unit 260 is a data backup mode, the composite image playback unit 250 is a backup composite image When the signal is reproduced from the video tape 300, and in the normal access mode, the composite image reproducing unit 270 reproduces the actual composite image signal from the video tape 300.

The signal switching control unit 280 that determines the operation mode by generating a selection control signal for switching the signal, when the normal access mode is selected by the user input, switches the input signal switching unit 230 and the output signal through the selection control signal. The control unit 260 is connected to the input connector 201 and the output connector 202 of the data backup device 200, respectively, and if the data backup mode is selected by the user input, the input signal switching unit through the selection control signal. The control unit 230 and the output signal switching unit 260 are connected to the backup composite image converter 220 and the backup composite image reverse converter 270, respectively.

Here, the heading information obtained by the heading information acquisition unit 340 to be described later with reference to FIG. 6 may be provided to the host computer 100 through the heading information access control unit 390. Detailed description thereof will be described with reference to FIG. 6 for convenience.

Hereinafter, the mechanism of the video tape recorder will be described in detail with reference to the accompanying drawings in order to help understanding of the present invention.

The most characteristic part of the video tape recorder's mechanism is a tape loading mechanism, which draws the tape from the cassette and mounts it to the rotating head cylinder, which is somewhat different between the VHS and beta methods. Although there is a point, I will briefly examine the tape driving mechanism and tape loading mechanism of the VHS system widely used by the general public.

The main feature of the video tape recorder according to the VHS method is that it employs a method called M-loading mechanism or parallel loading mechanism for tape loading.

FIG. 5 is an exemplary view schematically showing a loading mechanism (ie, a playback mechanism) of a video tape recorder according to the VHS scheme along a travel path of a tape.

When a cassette (not shown) is inserted into the video tape recorder, a capstan 15 and a tension arm (not shown) are positioned inside the video tape 20 in the cassette (not shown), and two sets of loading posts (loading post; 5, 10) is attached to each loading arm (not shown), it is possible to perform fast rewind and fast forward in this state.

At this time, when the play button (not shown) is pressed, two loading arms (not shown) move so that the video tape 20 is drawn out and moved by the two loading posts 5 and 10, and the tension arm (not shown) is also moved. Afterwards, two impedance rollers 4 and 11 and the full width erasing head 3 move inward, and two lock arms (not shown) are two loading arms (not shown). ) Are locked at the position of a loading stopper (not shown), respectively, and the video tape 20 starts running as the pinch roller 14 compresses the capstan 15.

Two video heads 7 are attached to the surface of the upper rotating cylinder 8a at intervals of 180 ° and the video tape 20 runs while being wound at 180 ° to the head drum 6. The head drum 6 is inclined with respect to the chassis and is wound inclined with respect to the video tape 20 traveling in parallel with the chassis.

The fixed lower cylinder 8b has a tape guide 9 for guiding the video tape 20. When the video tape 20 moves up and down in the tape guide 9, the video head 7 Since it is impossible to accurately trace on the video track, the loading posts 5 and 10 are provided on both sides of the rotating head cylinder 8a.

The loading posts 5 and 10 draw and move the video tape 20 when loading the video tape 20. Looking at the two sets of loading posts 5 and 10, each of the loading posts 5 and 10 is perpendicular to the inclined ones. And the video tape 20 is accurately guided by such loading posts 5 and 10 and stably travels along the tape guide 9 of the lower cylinder 8b.

The large impedance rollers 4 and 11 located at both ends of the head drum 6 stabilize the running of the video tape 20 and absorb the vibration of the video tape 20 so as to jitter, i.e., a playback signal. This prevents the screen from shaking due to shaking.

Looking at the running path of the tape according to such a mechanism sequentially, the video tape 20 withdrawn from the supply side reel (1) of the cassette (not shown) is the full width erasing head via the tension arm (not shown) (3). The full width erasing head 3 erases by flowing a high frequency current during recording. The video tape 20 then records or plays back the video signal in the rotating head cylinder 8a and then arrives at the audio / control head 13 via the audio cancellation head 12.

The audio / control head 13 records or reproduces an audio signal and a control signal in each track as an upper audio head 13a and a lower control head 13b.

The audio erasing head 12 is not used because there is a normal full width erasing head 3, but only the audio erasing head 12 operates during audio dubbing. The tape 20 is then wound through the capstan 15 to stably run the video tape 20 and then wound around a take-up reel of a cassette (not shown).

The primary purpose of having a control track in a typical video tape is to control the phase of the capstan 15 using a control pulse read out to the control head 13b, where the period of occurrence of the control pulse is recorded on the video tape. In accordance with the vertical synchronizing signal of the video signal, the data backup system using the video tape recorder of the present invention intends to provide title information of the backup data using this control track.

The configuration and operation of a preferred embodiment of a title information access device of a data backup system according to the present invention, which can be provided as an embodiment of the above loading mechanism, will be described with reference to the accompanying drawings.

6 is a block diagram showing a preferred embodiment of the apparatus for accessing title information of the data backup system according to the present invention.

As shown in Fig. 6, a preferred embodiment of the heading information access apparatus of the data backup system according to the present invention comprises: a control head 13b for accessing a control track of a video tape; A heading information encoding section 310 for generating heading information codes by encoding heading information for each backup data with a heading information recording mode selected for recording heading information; A title information code recorder (320) for selectively recording the title information code through the control head on a control track co-ordinated with the video track and the audio track of the video tape 20 on which the respective backup data is recorded; A title information code reading section (330) for reading the title information code from the control track through the control head (13b) with a title information reading mode selected for reading the title information; A title information obtaining unit (340) for decoding title information codes received from the title information code reading unit (330) to obtain title information of backup data recorded in video tracks and audio tracks collinear with the control tracks; A heading information converting unit 345 converting heading information received from the heading information obtaining unit 340 into data for transmission to the host computer 100 through a communication port 210 and applying it to a heading information access control unit; A text data output unit 360 which receives the heading information from the heading information obtaining unit 340 and reads out the text corresponding to the heading information from the text memory 350 storing the text; An OSD signal generator 370 for generating an on-screen display signal (OSD signal) received from the text data outputter 360 and displaying the text data on the display 400; A user input unit 380 for authorizing user input such as operation mode selection, heading information input, or the like; The input received from the user input unit 380 is interpreted, and the title information encoding unit 310, the title information code recording unit 320, the title information code reading unit 330, the title information obtaining unit 340, and the character data output unit And a title information access control unit 390 that controls the overall 360 to allow the user to access the title information.

Hereinafter, the operation of the preferred embodiment of the device according to the present invention configured as described above and the preferred embodiment of the method according to the present invention which can be applied thereto will be described.

7 is a flowchart showing a preferred embodiment of the method for accessing title information of the data backup system according to the present invention. It is well known that the hardware subject of the present invention is the title information access control unit 390.

As shown in Fig. 7, a preferred embodiment of the method for accessing the title information of the data backup system according to the present invention firstly records the backup data in at least one of the audio track and the video track of the video tape 20. A title information recording mode selection step (S10) of selecting a title information recording mode for recording title information for backup data is performed.

At this time, the command for selecting the operation mode as the title information recording mode is preferably provided from the host computer 100 through the communication port 210, but this command is directly provided through the preset mode selection means of the video tape recorder of the present invention. You may be provided.

Subsequently, in the title information recording step (S20), each of the respective tracks is located on the same control track as the video track and the audio track where the respective backup data is recorded with the title information recording mode selected through the user input unit 380. Optionally record heading information for the backup data.

The above-mentioned title information recording mode selection step S10 and the title information recording step S20 will be described in more detail as follows.

First, after the video tape 20 is loaded by the loading mechanism, and the user selects the title operation mode as the information recording mode to record the title information through the user input unit 380, the title information access control unit 390 Receives this and sets the operation mode to the heading information recording mode (S10).

Accordingly, the heading information encoding unit 310 encodes the heading information for each backup data applied from the user input unit 380 to generate the heading information code (S21), and the heading information code recording unit 120 The title information code is selectively recorded through the control head on a control track that is co-ordinated with the video track and the audio track of the video tape 20 on which each backup data is recorded (S22).

Preferably, the title information code recorded in the control track of the videotape should take the form of a signal that can be clearly identified with a control pulse for controlling the phase of the capstan 15 of the loading mechanism, and the title information access device. Even a normal video tape recorder without a video recorder should be able to play back this video tape normally without any additional equipment.

In other respects, the reason for not recording the heading information code on the video track or the audio track is that a normal video tape recorder without heading information access device can play this video tape normally without additional equipment. This is to give generality.

On the other hand, in the title information reading mode selection step S30, the title information reading mode is selected to read the title information for the respective backup data.

Subsequently, in the title information obtaining step (S40), the title information of the backup data recorded in the video track and the audio track on the same line is acquired by reading the title information recorded in the control track while the title information reading mode is selected. .

The above-described title information reading mode selection step S30 and the title information obtaining step S40 are described in more detail as follows.

First, when the user selects the title operation mode as the information reading mode to read the title information through the user input unit 380 while the video tape 20 is loaded by the loading mechanism, the title information access control unit 390 In response to this, the operation mode is set to the title information reading mode (S30).

Accordingly, the title information code is read from the control track through the control head 13b through the title information code reading unit 330 (S41), and the title information code is read through the title information obtaining unit 340. The title information code received from the unit 330 is decoded to obtain title information of the backup data recorded in the video track and the audio track collinear with the control track (S42).

Then, in the display step 50, the character data corresponding to the title information read by the control track is displayed.

In this case, the text data output unit 360 receives the heading information from the heading information obtaining unit 340, reads the text corresponding to the heading information from the text memory 350 storing the text, and outputs the OSD signal. The generation unit 370 generates an on-screen display signal (OSD signal) that receives the text data from the text data output unit 360 and displays it on the display unit 400.

At this time, the on-screen display is one side of the display method, and may use any other display method without departing from the spirit of the present invention.

Accordingly, the user can list the heading information for each backup data displayed, which not only can identify the overall backup data recorded on the video tape, but also at the point where the desired heading information is displayed. By reproducing in the normal mode, desired backup data can be easily searched and reproduced.

In addition, the present invention converts the heading information received from the heading information acquisition unit 340 into data for transmission to the host computer 100 through the communication port 210 and applies it to the heading information access control unit 390. It is even more desirable to include providing the title information to the host computer 100 via the communication port 210.

In the above description, the expression 'access' means that the signal can be written and read.

According to the present invention described above, there is an advantage that a video tape recorder can be used as a peripheral device for data backup, such as a CD-ROM drive or a floppy disk drive, which is often used as a peripheral device of a host computer (100 or a personal computer). .

In other words, if a user inserts a video tape that has backed up data from the host computer into a video tape recorder, and then specifies a heading information access mode command, that is, a heading information recording mode command or a heading information reading mode command at the host computer, The host computer can provide convenience to the restoration and retrieval of the desired data by operating the video tape recorder through a communication port and receiving title information from or recording title information from the video tape recorder.

In particular, the title information access control unit 390 of the present invention can exchange title information with the host computer 100 through the communication port 210 with the host computer 100.

Terminologies used herein are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a person skilled in the art, and the definition should be based on the backup data throughout the present application. something to do.

In addition, since the present invention has been described through the preferred embodiment of the present invention, in view of the technical difficulty aspects of the present invention, those having ordinary skill in the art can easily be different from another embodiment of the present invention. Since modifications may be made, it is obvious that both the embodiments and modifications cited in the above description belong to the claims of the present invention.

As described in detail above, the title information for each of the backup data is selectively recorded on the control track which is in the same line as the video track and the audio track on which the respective backup data is recorded when the title information recording mode is selected. And reading the heading information recorded in the control track while the heading information reading mode is selected, to obtain and display the heading information of the backup data recorded on the video track and the audio track on the same line. According to the apparatus and method of accessing the heading information of the system, the user can list the heading information for each backup data to be displayed, which not only identifies the entire backup data recorded on the videotape, but also the desired heading information. Display When the videotape is reproduced in the normal mode at the point of time, the desired backup data can be easily searched and reproduced.

Claims (8)

In a data backup system that allows digital data from a host computer to be recorded / played back to videotape as backup data in composite video signal format: A heading information encoding section for generating heading information codes by encoding heading information for each backup data while the operation mode is selected in the heading information recording mode for recording heading information on the videotape; A title information code recording section for selectively recording the title information code through the control head on a control track co-ordinated with the video track and the audio track of the video tape on which the respective backup data is recorded; A title information code reading section for reading the title information code from the control track through the control head while the operation mode is selected as a title information reading mode for reading the title information; And And a title information obtaining unit for decoding title information codes received from the title information code reading unit and obtaining title information of backup data recorded on video tracks and audio tracks collinear with the control track. Device for accessing title information of the system. The method of claim 1, A heading information converter for converting heading information obtained by the heading information obtaining part into data for transmission to the host computer; And Title information for providing heading information for each backup data generated from the host computer to the heading information encoding section, and performing access control on the heading information to receive the output of the heading information converting section and provide it to the host computer. The title information access apparatus of the data backup system, further comprising an access control unit. The method of claim 1, A text data output unit which receives each title information obtained by the title information obtaining unit and reads and outputs a character corresponding to each title information in a character memory storing characters; And And a signal generator configured to generate a signal for receiving and displaying text data from the text data output unit. The method of claim 1, And a user input unit for selecting the operation mode and inputting the title information. The method of claim 1, wherein the title information, And at least one of a file name, a file size, a subtitle, and a recording date and time related to the backup data. 1. A data backup method in which digital data of a host computer can be recorded / reproduced on a video tape as backup data in a composite video signal format. A title information recording mode selecting step of selecting a title information recording mode for recording title information for the backup data when recording the backup data on at least one of an audio track and a video track of a video tape; A title information recording step of selectively recording title information for each of the backup data in a control track present on the same line as the video track and audio track in which the respective backup data is recorded when the title information recording mode is selected; A heading information reading mode selection step of selecting a heading information reading mode for reading heading information for each backup data; And And acquiring title information of the backup data recorded in the video track and the audio track on the same line as reading the title information recorded in the control track while the title information reading mode is selected. To access the heading information in the data backup system. The method of claim 6, And an on-screen display step of on-screen display of character data corresponding to the title information read into the control track. The method of claim 6, wherein the title information, And at least one of a file name, a file size, a subtitle, and a recording date and time related to the backup data.