KR0165300B1 - Magnetic medium information record/reproduction device and method thereof - Google Patents

Abstract

According to the present invention, when a video signal is recorded on a tape in a magnetic recording / reproducing apparatus, a unique tape number is automatically assigned to store recording content information and position information according to the tape number, and the program information of the tape can be checked during playback. The present invention relates to a magnetic recording medium information recording / reproducing apparatus and a method for automatically assigning a unique number previously assigned to a tape by a user.

The present invention automatically allocates the unique number of the tape and stores it in memory along with the tape information, while recording the tape unique number continuously during recording mode or during tape extraction, and reading the unique number of the recorded tape when the tape is inserted. In this way, the tape information stored in the memory is displayed on the monitor, and the tape information is displayed automatically even if the tape is inserted without entering the tape unique number.

Description

Magnetic recording medium information recording / reproducing apparatus and method

1 is a block diagram of a general video signal recording / reproducing apparatus.

2 is a block diagram of a magnetic recording medium information recording / reproducing apparatus according to the present invention.

FIG. 3 is a circuit diagram of the tape number recording control circuit shown in FIG.

4 is a diagram showing tape information displayed as OSD information on the monitor shown in FIG.

5 to 5C are waveform diagrams of input and output signals of the tape number recording control circuit shown in FIG.

6A to 6C are waveform diagrams of signals for tape number recording.

7A to 7C are waveform diagrams of signals for reproducing a tape number.

8 is a flowchart according to an embodiment of a magnetic recording medium information recording / reproducing method according to the present invention.

9 is a subroutine for recording the new tape number shown in FIG. 8 and FIG.

10 is a flowchart according to another embodiment of a magnetic recording medium information recording / reproducing method according to the present invention.

* Explanation of symbols for main parts of the drawings

10: remote control 20: key matrix

30: Micom 40: E ² PROM

50: video signal processing circuit 60: OSD circuit

70: monitor 80: servo circuit

90: reel sensor circuit 100: tape number recording control circuit

110: duty converter 120: selection switch

The present invention relates to a video signal recording / reproducing apparatus for recording and reproducing information on a magnetic recording medium. The present invention relates to a title, a program position, and the like while automatically assigning a unique magnetic recording medium number and recording according to the magnetic recording medium number. A magnetic recording medium information recording / reproducing apparatus and method for storing the same program information and enabling to check the program information of the magnetic recording medium during reproduction.

In general, in a video signal recording / reproducing apparatus such as a video cassette recorder or a camcorder, character information (tape number, program information (title, position on the tape)) regarding contents to be recorded by using a key input means such as a remote controller is stored in a memory. There was a function to display the contents stored in the memory by using the OSD (ON SCREEN DISPLAY) during playback, and in the past, the operation was possible only if the user directly recognizes the unique number of the tape.

According to FIG. 1, which shows a general video signal recording / reproducing apparatus, the microcomputer 30 recognizes key input of the key matrix 20 or the remote controller 10 to control the operation of the apparatus, and to the E ² PROM 40. While storing or reading the data, the driving speed of the servo circuit 80 is controlled to control the rotational speed and phase of the drum motor and the capstan motor.

The video signal processed by the video signal processing circuit 50 is applied to the OSD circuit 60, and the OSD circuit 60 generates the OSD text according to the OSD control signal applied from the microcomputer 30, and then displays the OSD text. The video signal is mixed and then displayed on the monitor 70.

When the tape unique number is inputted in the video signal recording / reproducing apparatus having such a configuration, the tape unique number, the program title, and the position on the tape will be described.

First, the unique number of the tape is input by using the tape number recording key mounted on the remote controller 10. Here, the tape unique number is a number arbitrarily set and assigned to each user tape. When the tape unique number is input, the microcomputer 30 assigns a tape unique number and information about a program to be recorded to an address to be stored in the E ² PROM 40.

Then, the title of the program to be recorded from the remote controller 10 is received and stored in the assigned address of the E ² PROM 40, while information on the position of the tape on which the program is to be recorded using pulses input from the take-up reel and the supply reel. Is stored in the assigned address of the E ² PROM 40.

At this time, the position on the tape for the program is input once again when the recording of the program is finished, and the end position of the program is registered. Therefore, the E ² PROM 40 stores information on the beginning and end positions of the tape on which the program is recorded. Such tape information extracts the tape after storing the entire contents in the E ² PROM 40 at the time of tape extraction.

Then, when the tape having the above-mentioned tape information (tape identification number and title, etc.) is reinserted, the information is displayed on the monitor 70 through the OSD circuit 60. That is, when the tape unique number is input through the remote controller 10 or the key matrix 20, the tape information is displayed on the monitor 70 in the OSD method.

However, the above method can display the information on the played tape only when the tape unique number assigned by the previous user, that is, the user who recorded the information, is correctly input during the tape playback.

If you did not enter the unique number of the inserted tape, you could not display the desired tape information. Entering the unique number of another tape would display the wrong information and could not find a specific program.

It is an object of the present invention to provide a magnetic recording medium information recording / reproducing apparatus and method for automatically assigning a magnetic recording medium unique number and displaying the magnetic recording medium information in an OSD manner.

It is another object of the present invention to provide a magnetic recording medium information recording / reproducing apparatus and method for continuously recording a tape unique number on a control track.

It is another object of the present invention to provide a magnetic recording medium information recording / reproducing apparatus and method for recording a tape unique number on a control track at the end of a program.

Accordingly, the magnetic recording medium information recording / reproducing apparatus according to the present invention comprises a magnetic recording / reproducing apparatus for recording a program and reproducing it;

A memory for storing program information for each magnetic recording medium number;

Control means for controlling the data writing / reading of the memory, reading the highest unique number among the unique numbers of the magnetic recording medium stored in the memory, and increasing the highest unique number to be output as new unique number data;

Recording control means for changing the duty ratio of the control pulse in accordance with the new number data outputted from the control means to record the unique number of the magnetic recording medium in the control track; And

And reproducing means for reproducing the unique number data recorded in the control track when the magnetic recording medium is in the confirmation mode or when the magnetic recording medium is loaded.

A magnetic recording medium information recording / reproducing method according to the present invention includes a method of recording and reproducing a magnetic recording medium number in a magnetic recording / reproducing apparatus including a memory in which program information is stored for each magnetic recording medium number;

A determination step of determining whether the magnetic recording medium unique number is stored in the memory when the magnetic recording medium is inserted or when the magnetic recording medium number confirmation mode is set;

A display step of displaying the magnetic recording medium information of the corresponding unique number stored in the memory as character information, if there is a unique number in the determining step;

A check step of checking a control pulse of a control track of the magnetic recording medium to determine whether it is a valid magnetic recording medium number if there is no unique number in the determining step; And

If the magnetic recording medium number is valid in the checking step, proceeding to the displaying step;

If the magnetic recording medium number is not valid, a recording step of recording the new magnetic recording medium number on the control track by varying the duty ratio of the control pulse.

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

FIG. 2 is a block diagram according to an embodiment of the magnetic recording medium information recording / reproducing apparatus according to the present invention, and the same reference numerals are given to the same components as those shown in FIG.

According to FIG. 2, a recording safety tap switch (SW) which is switched by at least a remote control 10 equipped with a tape number confirmation key and a tape number recording mode key, a key matrix 20, and a recording safety tap of a tape. And a reel sensor circuit 90 for detecting the remaining amount of tape on the reel according to the take-up reel pulse and the supply reel pulse, and a signal input of the remote controller 10 or the key matrix 20 to control the set operation state. Recognizing the switching state of the recording safety switch (SW), and inputs the tape reel pulse and supply reel pulse applied from the reel sensor circuit (90) to check the remaining amount of tape on the reel, and each tape unique number The E ² PROM 40 which writes / reads the stored program information and the OSD data applied by the microcomputer 30 are mixed with the video signal processed by the video signal processing circuit 50, and the mixed signal is transferred to the monitor 70. Display The serial data is received from the OSD circuit 60 and the microcomputer 30 to control the rotation speed and phase of the drum motor (not shown) and the capstan motor (not shown), and to control the playback control signal and the recording control signal. The servo circuit 80 to be applied to the 30 and the recording control signal output from the servo circuit 80 are applied to the control head CH after the duty ratio is changed by the recording data applied from the microcomputer 30 to the tape. And a tape number recording control circuit 100 to be recorded on the control track.

Here, the tape number recording control circuit 100 is a duty conversion unit 110 for changing the duty ratio of the recording control pulse, as shown in Figure 3, and the recording control pulse and conversion converted in the duty conversion unit 110 It is composed of a selection switch 120 for switching and outputting the non-recording control pulse in response to the recording data applied from the microcomputer 30.

Next, the operation of FIGS. 2 and 3 will be described with reference to FIGS. 4, 5a-5c, 6a-6c, and 7a-7c.

2, the remote controller 10 inputs an operation command to the microcomputer 30, and is equipped with a tape information confirmation key and a tape number recording mode key in addition to the normal function keys.

When the tape information confirmation key is input, the microcomputer 30 displays the tape information stored in the E ² PROM 40. If the new tape does not have the tape information, the microcom 30 records the recording data for the new tape number in the tape number recording control circuit 100. )

The E ² PROM 40 is an auxiliary memory device of the microcomputer 30. The E ² PROM 40 can freely store and remove data, and will be stored as it is even when the power is turned off, unless the stored information is removed. Tape information about the program title (contents), program start position, and program end position will be memorized.

The reel sensor circuit 90 is a circuit generally used in a video signal recording / reproducing apparatus, and generates a take-up reel pulse and a supply reel pulse according to the rotation amounts of the take-up reel and the supply reel and applies them to the microcomputer 30. The microcomputer 30 calculates information on the remaining tape amount or the program start position and the program end position using the supply reel pulse and the take up reel pulse.

That is, whenever a program is recorded, the current position is stored in the E ² PROM 40 at the recording start position, and when the program is recorded, the count is counted and the current progress is performed from the recording section (time) or the beginning of the program until the end of recording. Calculate the amount.

In addition, the microcomputer 30 controls the OSD circuit 60 so that the program title and the program position are mixed with a video signal processed and applied by a known video signal processing circuit 50 as shown in FIG. 70). Here, the information is displayed on the monitor 70 as text and / or figure information.

The servo circuit 80 receives serial data from the microcomputer 30 and controls the rotational speed and phase of the drum motor and the capstan motor, and outputs the reproduction control signal and the recording control signal to the microcomputer 30. The servo circuit 80 is also a known functional block used in the video signal recording / reproducing apparatus.

The duty converter 110 of the tape number recording control circuit 100 shown in FIG. 3 converts the 50% duty ratio of the normal recording control pulse to 25%.

The selection switch 120 selects one control pulse among the original recording control pulse (50%) and the recording control pulse (25%) whose duty ratio is converted by the duty converter 110 by the recording data of the microcomputer 30. To print.

In other words, if the recording data (Fig. 5a) is at the 'high' level, the terminal (H) is selected and the normal recording control pulse (Fig. 5b) is at the low level. (L) is selected to output a control signal having a duty ratio of 25%, and an output as shown in FIG. 5C is applied to the head CH and recorded on the tape.

In the present invention, when the data bits are 8 bits, the first 4 bits are written as they are and the latter 4 bits are inverted to be recorded as the first 4 bits of complement. When the 4 bits of are in inverse relationship, the tape unique number is recognized as the previous 4 bits of data.

For example, if the tape ID number is specified as 9, the first 4 bits become 1001 and the subsequent 4 bits become 0110, which is the inverted number.

In this case, the number of cases in which the preceding 4-bit data can be expressed is 16, and since the data represented by 0 and 1111 is not recorded, the tape number recording control circuit 100 can record 14 kinds. Will be.

These two data values are left to distinguish them from the data in the Video Index Search System (VISS) section.

That is, during reproduction, control pulses are not detected in the VISS recording section in which the entire signal has a 25% duty ratio.

Thus, the tape unique number can be recorded in a combination of a control pulse having a converted duty ratio of 25% and a normal control pulse having a 50% duty ratio.

Here, the VISS function is for finding a section having a duty ratio of 25% or longer. That is, the data is recorded as continuous high unlike having a normal 50% duty ratio.

In addition, by using all 8 bits, unique numbers of 254 tapes can be assigned except for data represented by '00000000' or '11111111'.

The control of the microcomputer 30 at the time of tape number recording will be described below.

The microcomputer 30 reads the highest data of the tape unique number of the E ² PROM 40 which is the auxiliary memory, and adds 1 to this to set the current tape unique number. When the program is recorded in the recording mode, the recording contents (title, position information, etc.) are stored in an address allocated differently for each tape unique number of the E ² PROM 40.

When the tape number is recorded on the tape, for example, if the tape unique number is 9, the recording data corresponding to the tape unique number '9' to be applied to the tape number recording control circuit 100 by the microcomputer 30 (seventh 6b). The recording control pulse signal REC CTL shown in FIG. 6A is recorded in the control track while the program is recorded as a signal as shown in FIG. 6C through the tape number recording control circuit 100 in FIG.

On the other hand, immediately after tape recording, just before the tape extraction, the tape unique number data can be written in the tape with 4 bits intact and 4 bits inverted.

The processing of the microcomputer 30 at the time of tape number reproduction will now be described.

When inserting the first video tape, it rewinds about 1 second, and plays it for 1 second again. Code data of the playback control pulse is compared with the inverted data of 4-bit data and subsequent 4-bit data. To be recognized.

That is, the control pulse recorded on the tape is detected by the control head CH, converted into a square wave in the servo circuit 80, and then applied to the microcomputer 30 as a reproduction control signal PB CTL, and reproduced by the microcomputer 30. The control pulse (Fig. 7a) is separated into a code separation reference clock (Fig. 7b), and the separated code is as shown in Fig. 7c. That is, if the duty ratio is 50% or more, '1' is recognized and if it is 25% or less, '0' is recognized and separated into codes.

After performing the recording mode after recognizing the tape unique number, the recorded contents (title, position information, etc.) are stored in an address allocated differently for each tape unique number of the E ² PROM 40.

On the other hand, when the tape contents confirmation key is inputted to the remote controller 10 in a code other than the recording mode, the tape identification number is displayed on the monitor 70, and the recording contents assigned to the tape identification number are monitored as shown in FIG. All of them are displayed at 70.

Next, the magnetic recording medium information recording / reproducing method according to the present invention will be described.

The present invention is divided into two embodiments in recording tape numbers.

Thus, the first method is described in conjunction with FIGS. 8 and 9, and the second method is described in conjunction with FIGS.

In the first method, in the case of a tape without a tape number, the unique number of the tape assigned in the recording mode is continuously recorded in the control track, and the program accuracy (program start position, end position, title) is recorded at the time of program recording. It is written to the E ² PROM 40 at the start and end.

8 is a flowchart according to an embodiment of a magnetic recording medium information recording / reproducing method according to the present invention.

According to Fig. 8, it is determined whether the tape number confirmation key is input or the tape is loaded (step S11. S12).

If the tape number confirmation key is input or the tape is loaded, it is determined whether there is the tape number data stored in the E ² PROM 40 (step S13).

If the tape number data exists, the tape number and the tape information stored in the E ² PROM 40 are displayed (step S23). Otherwise, the playback control pulse monitoring function is turned 'on' (step S14).

Herein, the monitoring function shifts the input level of the playback control pulse to the 8-bit register (not shown) located inside the microcomputer 30 in accordance with the reference clock generated from the microcomputer 30 after the half cycle delay time of the control pulse. If all 8-bit data are stored in the 8-bit register, the upper 4 bits and lower 4 bits of data stored in the register are compared and the valid data register located inside the microcomputer 30 is not valid. It means to write valid data in.

After turning on the playback control pulse monitoring function, the tape is rewound for 1 second (step S15), and it is determined whether there is no signal section (step S16).

If the signal-free period, the high-speed reverse rotation until the signal is detected (step S17). If the signal is not in the no-signal section or a signal is detected in step 17, it is determined whether the section is a VISS section (step S18). That is, since zero data is detected in the VISS section, high-speed reverse rotation is performed until data is detected.

After the high-speed reverse rotation until the VISS section passes, the tape is rewound at 1x for 1 second (step S20), and the tape is regenerated (step S21) to determine whether the input data is valid tape number data (step S22).

In the case of the data of the effective tape number in step S22, the tape information is displayed on the monitor 70 together with the tape number (step S23). In the absence of the effective tape number data, the character information of 'new tape' in the monitor 70 is displayed. After displaying (step S24), a subroutine for recording a new tape number is performed (step S25).

FIG. 9 is a subroutine for recording the new tape number shown in FIG. 8, and applies to the two embodiments of the present invention as well.

In FIG. 9, first, the highest number among the tape unique numbers stored in the E ² PROM 40 is read, and then 1 is added to determine the unique number of the new tape (step S26).

When the new tape unique number is determined, it is determined whether the tape unique number is the maximum number (step S27), and if the tape unique number is the maximum number, the maximum tape unique number is displayed (step S28).

After the maximum number of the tape unique number is displayed, it is determined whether to input a new number (step S29). If a new tape unique number is input, the control pulse recording mode is turned on to adjust the duty cycle of the control pulse corresponding to the new tape number. The tape number is recorded and recorded on the control track (steps S30 and S31).

In the second method, the tape number is recorded in the control track immediately before the recording of the program is finished and the tape is extracted, and the tape number and the program information are recorded in the E ² PROM 40.

Here, in the second method, if you insert the tape at the time just after the completion of the program to record the program on the tape again, the normal tape unique number can be reproduced. However, if the tape is inserted after the operation in the FF direction, the signal is not detected. Since the tape number is sometimes assigned, the tape unique number can always be recognized by the microcomputer 30 by continuously recording the tape number on the control track as in the first method.

10 is a flowchart according to another embodiment of the magnetic recording medium information recording / reproducing method according to the present invention.

In FIG. 10, it is determined whether the recording of the program has ended or whether the current mode is the extraction mode (steps S101 and S102).

If recording of one program is completed or the current mode is the extraction mode in steps S101 and S102, it is determined whether the tape number is stored in the E ² PROM 40 (step S103).

If the tape number data is present, the CTL pulse recording mode is turned on to record the already stored tape number, and the duty cycle of the control pulse is changed in accordance with the tape number. As a result, the tape number data to be stored in the E ² PROM 40 is recorded. The program information is stored in the program information E ² PROM 40 at the time of extraction (steps S104, S105, and S106).

If there is no tape number, a new tape is displayed (step S107), a new tape is displayed, and a subroutine for recording a new tape number is performed (step S108).

Since the subroutine for recording the new tape number is as shown in FIG. 9, it will be omitted here.

That is, when the tape unique number is recorded on the tape just before the tape extraction, and the tape is inserted again, the tape unique number described above is read, and the tape information corresponding to the number is read from the E ² PROM 40 to monitor the tape ( 70).

According to the present invention, when a video signal is recorded on a tape, such as a video cassette recorder or a camcorder, a unique number of a tape is assigned to store character information about a program, and then checked during playback. Make it possible. In addition, the present invention can be easily applied to a function capable of specifying and playing back a playback order.

As described above, the present invention automatically assigns a tape unique number and assigns an address according to the number to store tape information and records the tape unique number on the tape so that the tape can be automatically assigned without having to specify the tape unique number. The tape information is displayed along with the unique number to provide convenience in recording / reproducing the video signal.

Claims (9)

A magnetic recording / reproducing apparatus for recording a program and reproducing it; A memory for storing program information for each unique number of the magnetic recording medium; Control means for controlling the data writing / reading of the memory, reading the highest unique number among the unique numbers of the magnetic recording medium stored in the memory, and increasing the read number to output new unique number data; Recording control means for changing the duty ratio of the control pulse in accordance with the new number data outputted from the control means to record the magnetic recording medium number in the control track; And reproducing means for reproducing a unique number data recorded on the control track when the magnetic recording medium checking mode or the magnetic recording medium is loaded. The recording medium of claim 1, wherein the recording control means comprises: duty conversion means for changing a duty ratio of the control pulse; And switching means for selecting the control pulse converted by the duty converting means or the control pulse which is not converted according to the new number data output from the control means and outputting the control pulse to the control head. / Playback device. 2. The magnetic recording medium information recording / reproducing apparatus according to claim 1, wherein the recording control means continuously records the magnetic recording medium number on a control track while the program is recorded. 2. The magnetic recording as claimed in claim 1, wherein the recording control means records the magnetic recording medium number in a control track immediately before tape extraction after the recording of the program is completed, and stores the magnetic recording medium number and program information in the memory. Media information recording / playback device. The method of claim 1. And an OSD means for displaying the magnetic recording medium number and the program information as character information under the control of the control means. The control means according to claim 1, wherein the control means detects an input level structure state of the control pulse reproduced by the reproduction means in accordance with a reference clock generated after a predetermined time delay of the control pulse, and records the magnetic force recorded on the control track. A magnetic recording medium information recording / reproducing apparatus, characterized by recognizing a recording medium number. A method of recording and reproducing a magnetic recording medium number in a magnetic recording / reproducing apparatus including a memory in which program information is stored for each magnetic recording medium number; A determination step of determining whether the magnetic recording medium unique number is stored in the memory when the magnetic recording medium is inserted or when the magnetic recording medium number confirmation mode is set; A display step of displaying, as character information, magnetic recording medium information corresponding to the unique number stored in the memory if there is a unique number in the determining step; A checking step of checking whether a valid magnetic recording medium number is obtained by examining a control pulse of a control track of the magnetic recording medium if there is no unique number in the determining step; And if the magnetic recording medium number is valid in the checking step, proceeding to the displaying step; And recording the new magnetic recording medium number on the control track by varying the duty ratio of the control pulse if the magnetic recording medium number is not valid. 8. The method of claim 7, wherein in the recording step, the magnetic recording medium number is continuously recorded on a control track while a program is recorded. 8. The magnetic recording method of claim 7, wherein in the recording step, after recording of the program is completed, the magnetic recording medium number is recorded in the control track immediately before extraction of the magnetic recording medium, and the magnetic recording medium number and program information are stored in the memory. Recording medium information recording / playback method.