KR19980053606A - Digital V's Password Recorder / Playback Device - Google Patents

Abstract

The present invention relates to a password recording / reproducing apparatus of a digital VLC. The present invention records such a password on a magnetic recording tape, and then records it on the tape by reproducing a program when a number corresponding to the recorded password is input. Protected information can be protected.

Description

PASSWORD RECORDING / PLAYBACK APPARATUS FOR DIGITAL VCR

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a password recording / reproducing apparatus for a digital VRL, and more particularly, to recording a password on a magnetic recording tape, and then recording the password of a digital VRL for reproducing a program when a number corresponding to the recorded password is input. It relates to a playback device.

In the conventional digital VR system, the password could not be recorded on the magnetic recording tape, and anyone could easily reproduce the recorded program.

[0003] The conventional digital VR system has a problem that the recorded program cannot be protected due to the inability to record the password on the magnetic recording tape and anyone can easily reproduce the recorded program.

Accordingly, it is an object of the present invention to provide a digital VRL password recording / reproducing apparatus for recording a password on a magnetic recording tape and reproducing the program when a number corresponding to the recorded password is input.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram of a digital VR password recording / reproducing apparatus according to a preferred embodiment of the present invention.

FIG. 2 is a track structure diagram of data recorded by FIG. 1;

(A) is a track structure diagram of 365 sync block data coded by the codec unit in FIG. 1,

(B) is a track structure diagram of 16 subcode sync block data formed in the microcomputer in FIG. 1,

(C) is a detailed track structure diagram of one subcode sync block data in (B).

3A and 3B show a recording area of password data recorded / reproduced in FIG.

Explanation of symbols for the main parts of the drawings

1: key input 2: microcomputer

3: display section 4: codec section

5: data detector 6: head

7: data extraction unit

Means for achieving the object of the present invention comprises a key input means having a password recording / playback key and a plurality of function keys; After recognizing the recording mode by the input of the recording key in the key input means, the password data is generated by the input of the password recording key of the key input means to identify the first in the first to third subcode sync blocks. 16 subcode sync block data is formed and output in 8-bit units, and a data extraction control signal is generated by inputting a password regeneration key from the key input means to generate 16 sub code sync block data. A microcomputer provided to restore the password data, and compare the restored password with the password according to the input of the password recording key in the key input means and control the reproduction of the program according to the comparison result; Codec means for encoding the 8-bit subcode sync block data and the input program data output from the microcomputer in the recording mode to output 365 sync block data, and decoding the 365 sync block data detected and provided in the playback mode. and; Data detection means for detecting 365 sync block data output from the codec means in a recording mode, recording the data to magnetic recording tape via the head, and detecting 365 sync block data reproduced through the head under the control of the microcomputer; And data extracting means for extracting the 16 subcode sync block data decoded by the codec means by the data extraction control signal generated by the microcomputer in the reproduction mode and providing the same to the microcomputer.

There may be a plurality of embodiments of the present invention, the following will be described in detail for the preferred embodiment. This preferred embodiment allows for a better understanding of the objects, features and effects of the present invention.

Fig. 1 shows a block diagram of a password recording / reproducing apparatus of a digital VR according to a preferred embodiment of the present invention.

As shown in FIG. 1, a digital VSE password recording / reproducing apparatus according to a preferred embodiment of the present invention includes a key input unit 1 having a plurality of function keys such as a password recording / playback key, and the key input unit ( After recognizing the recording mode by the input of the recording key of 1), the password data is generated by the input of the password input key of the key input unit 1 so as to generate a subcode sync block # 0-subcode sync block #. 2, 16 subcode sync block # 0-subcode sync block # 15 data are generated and output in units of 8 bits, and the key input section 1 A data extraction control signal is generated by inputting a password regeneration key at < RTI ID = 0.0 > 16 < / RTI > to receive 16 subcode sync block data to restore password data, and the restored password and the key input unit 1 The microcomputer 2 which controls the reproduction of the program according to the comparison result compared with the password according to the input of the password recording key, and the 8-bit subcode sync block data output from the microcomputer 2 in the recording mode. And a codec unit 4 which encodes input program data to output 365 sync blocks, and decodes the 365 sync block data detected and provided in the playback mode, and in the recording mode. The 365 sync blocks data output from the codec unit 4 is detected and recorded on the magnetic recording tape via the head 6, and the 365 sync blocks data reproduced via the head 6 are reproduced in the reproducing mode. A 16 subcode sync block decoded by the codec unit 4 by the data detection unit 5 to detect and the data extraction control signal generated by the microcomputer 3 in the reproduction mode. A data extraction section 7 for extracting a key and providing it to the microcomputer 3, and a password recording key input from the key input section 1 to a password input message and a password restored from the microcomputer 2; And a display unit 3 for displaying a password input message on the screen.

The operation of the password recording / reproducing apparatus of the digital VR according to the preferred embodiment of the present invention configured as described above will be described in detail with reference to FIGS. 2 and 3.

First, when a user inputs a password recording key (not shown) provided in the key input unit 1 to record the program password on the magnetic recording tape, the microcomputer 2 recognizes the input of the password input key. After that, a password input message is displayed on the monitor which is the display unit 3. FIG.

Then, when the user sees the password input message displayed on the monitor, and the key corresponding to the password enters the number key provided in the input unit 1, the microcomputer 2 displays the input password of FIG. In the reserved area of the identification code recording area ID0, which is one byte shown in (A) of FIG. 3, in the subcode sync block (subcode sync block # 0 to subcode sync block # 2) shown in B). Will be recorded.

That is, the upper four bits and the lower four bits of each 1 byte of the identification code recording area ID0 in the subcode sync block (subcode sync block # 0 to subcode sync block # 2) are divided into six numeric passwords (1). -6) will be recorded.

On the other hand, when the password recording key is not input by the user, the microcomputer 2 performs the subcode sync block # 0 in the subcode sync block # 2 shown in FIG. 0 is recorded in the reserved area (Reserved) of the identification code recording area ID0, which is one byte shown in Fig. 3A.

As shown in Fig. 2C, the microcomputer 2 includes two bytes of sync code (sync), four bytes of identification codes (ID0, ID1, IDP, Format ID), and four bytes in the password data. An inner parity code of (inner parity) is added to form one subcode sync block (0) of 28 bytes.

Subsequently, the microcomputer 2 performs the process of forming the formed subcode sync block # 0, and the 15 subcode blocks shown in FIG. 2B (Subcode sync block # 1-Subcode sync). block # 15) to form data to form 4 sync blocks (Sync block # 0-Sync block # 3).

The microcomputer 100 that has formed the 16 subcode sync block (Subcode sync block # 1-Subcode sync block # 15) data, which is the 4 sync blocks (Sync block # 0-Sync block # 3), has 8 sub-bits. The code data is sequentially transmitted to the codec unit 4.

On the other hand, when one subcode sync block # 0 transmitted from the microcomputer 2 is received by the codec unit 4, the codec unit 4 sends a recognition signal ack to the microcomputer ( 2).

The microcomputer 2 transmits the next 1 subcode sync block # 1 data to the codec unit 4 as a recognition signal is provided from the codec unit 4.

When the operations of the microcomputer 2 and the codec unit 4 are repeatedly executed, 1648 subcode sync block data (subcode sync block # 0-subcode sync block # 15) of 448 bytes are received by the codec unit 4. The codec unit 4 receives main data from an external source, margins of 2 synchronization blocks, preambles of 3 synchronization blocks, subcodes of 4 synchronization blocks, and 3 synchronizations. Postamble of blocks, IBG (Inter Block Gap) of 3 sync blocks, preamble of 1 sync block, main code of 336 sync blocks, postamble of 2 sync blocks, and A margin of two sync blocks is formed, and 356 sync blocks data is provided to the data detector 5.

The data detection unit 5 detects data of 356 sync blocks provided by the codec unit 4 and records the data on the magnetic recording tape via the head 6.

Through this process, 365 sync block data is recorded on each track of the magnetic recording tape.

Subsequently, when a user inputs a password reproducing key (not shown) provided in the key input unit 1 to reproduce a program recorded on a magnetic recording tape, the subcoder synchronous block (subcode) passes through the head 6. sync block # 0-The password data recorded in the identification code recording area ID0 of the subcode sync block # 2 is reproduced, detected by the data detection unit 5, and decoded by the codec unit 4.

The microcomputer 2 recognizes the input of the password reproducing key from the key input unit 1, generates a data extraction control signal, and provides the data extraction control signal to the data extraction unit 7, and the data extraction unit 7 Extracts the password data of the subcode sync block (subcode sync block # 0-subcode sync block # 2) decoded by the codec unit 4 by the data extraction control signal generated in the microcomputer 2 To the computer 2.

Therefore, the microcomputer 2 restores the password data provided from the data extracting section 7, and if the restored password data is 0, recognizes the VCD mode as the playback mode and performs the playback operation of the VCD. Control.

On the other hand, if the restored password data is not 0, after pausing the VR system, a password input message is displayed on the monitor, which is the display unit 3. FIG.

Then, when the user inputs a password by viewing the password input message displayed on the monitor, which is the display unit 3, the microcomputer 2 compares the restored password with the input password.

As a result of the comparison, if the passwords do not match, the microcomputer 2 removes the tape from the deck. If the passwords match, the microcomputer 2 recognizes the VCD mode as the playback mode and reproduces the VSEAL. It will control the operation.

And while specific embodiments of the present invention have been described and illustrated, it can be seen that the present invention is not limited to this as many modifications are possible.

Therefore, it is to be understood that within the true spirit and scope of the principles described and claimed herein, the invention and all modifications may be covered.

The present invention has the effect that the information recorded on the tape can be protected by reproducing the program when the password is recorded on the magnetic recording tape and a number matching the recorded password is input.

Claims (2)

Key input means having a password recording / playback key and a plurality of function keys; After recognizing the recording mode by the input of the recording key in the key input means, the password data is generated by the input of the password recording key of the key input means to identify the first in the first to third subcode sync blocks. 16 subcode sync block data is formed and output in 8-bit units, and a data extraction control signal is generated by inputting a password regeneration key from the key input means to generate 16 sub code sync block data. A microcomputer provided to restore the password data, and compare the restored password with the password according to the input of the password recording key in the key input means and control the reproduction of the program according to the comparison result; Codec means for encoding the 8-bit subcode sync block data and the input program data output from the microcomputer in the recording mode to output 365 sync block data, and decoding the 365 sync block data detected and provided in the playback mode. and; Data detection means for detecting 365 sync block data output from the codec means in a recording mode, recording the data to magnetic recording tape via the head, and detecting 365 sync block data reproduced through the head under the control of the microcomputer; And a data extracting means for extracting the 16 subcode sync block data decoded by the codec means by the data extraction control signal generated by the microcomputer in the reproduction mode and providing the same to the microcomputer. SAR password recording / playback device. 2. The display apparatus according to claim 1, further comprising: display means for displaying a password input message on a screen by a password recording key input on the key input means and a password input message on a screen by a password restored in the microcomputer; And a password recording / reproducing apparatus for a digital VCD.