KR20000046880A - Device for preventing copy from storing medium and for levying fare - Google Patents

Abstract

PURPOSE: A device for protection of CONSTITUTION: In case of detecting a specific code(code1) in input data, an output data is generated by a playing back process. In case of not detecting the certain code while detecting the identified set number with a present set, the data is recorded in the same set. Thus, a normal playing back is operated. When the set number is different while detecting a certain code(code2), the data is recorded in the different set. Thus, the normal playing back is prevented. Herein, if the certain code(code2) is not detected while detecting the same card number with an inserted card, the normal playing back is operated.

Description

Copy protection and charging devices in storage media

The present invention relates to a technology for preventing illegal use of digital data requiring copyright protection, and in particular, to prevent unauthorized copying of digital information using an image medium, and to charge a fee for legally copying or playing it. A copy protection and charging device in a suitable storage medium.

Recently, various new media for recording or reproducing video have emerged, and the problem of illegal copying has emerged. Although copy protection has been developed for analog video such that image quality deteriorates every time illegal copying, such a function cannot be applied to digital video.

This is because a digital image medium cannot be deteriorated in image quality whenever an unauthorized copy is made.

As described above, there is a defect in that copyrights cannot be effectively protected because the conventional system does not provide illegal copy protection for information recorded on various digital video media.

Accordingly, the technical problem to be achieved by the present invention is to record a digital video signal on a recording medium, and to record a mixture of information such as whether the program is copy-protected and the information of the set, and a card that checks a fee. The present invention provides a copy protection and charging device in a storage medium that checks information output from a tape or a disk together with information provided by a set or an individual and then decides whether to output the data.

1 is an exemplary block diagram of a copy protection and charging apparatus in a storage medium according to the present invention.

FIG. 2 is a detailed block diagram illustrating an embodiment of the information insertion unit in FIG. 1. FIG.

3 is a sync block and tape information format diagram according to the present invention;

4 is a flowchart of a recording signal according to the present invention;

5 is a reproduction signal processing block diagram according to the present invention;

FIG. 6 is a detailed block diagram illustrating an embodiment of an information retrieval unit in FIG. 5; FIG.

7 is a flowchart of a playback signal according to the present invention;

** Description of symbols for the main parts of the drawing **

101: tape interface unit 102: buffer buffer

103: memory 104: memory control unit

105: external parity processing unit 106: internal parity processing unit

107: format signal generator 108: information insertion unit

109: channel interface unit

1 is a block diagram illustrating an example of a copy protection and charging device in a storage medium for achieving the object of the present invention. As shown _in FIG. Buffer buffer 102 is temporarily stored; A memory control unit (104) for exerting a control function to store data output from the buffer buffer (102) in the memory (103) in units of shuffle; An external parity processing unit (105) for imposing external parity on data stored in the memory (103); An internal parity processing unit (106) for imposing internal parity in units of sync blocks output from a format signal generator (107) to data imposed with external parity output from the memory (103); An information insertion unit 108 for generating various control codes for unauthorized copy protection when a copy protection signal copy_inhi is input from the outside; A channel interface unit 109 inserts and outputs various control codes output from the information insertion unit 108 to data output from the internal parity processing unit 106.

FIG. 2 is a detailed block diagram illustrating an embodiment of the information insertion unit 108 in FIG. 1. As illustrated therein, a copy protection code cpt_c is set when a copy protection signal copy_inhi is input from the outside. A copy existence determination unit 201 for generating a number set_no and an inserted card number card_no; The multiplexer 202 receives the output signals cpt_c, set_no, and card_no of the copy existence determining unit 201 and mixes and outputs them in a predetermined format according to the control signal CS.

When described in detail with reference to Figures 3 to 7 attached to the operation of the present invention configured as described above are as follows.

The image data DATA _in input through the tape interface unit 101 is temporarily stored in the buffer buffer 102 and then stored in the memory 103 by the memory controller 104.

External parity is imposed by the external parity processing unit 105 on data stored in the memory 103 in a predetermined unit, that is, in a shuffle unit.

Subsequently, when the data to which the external parity output from the memory 103 is applied is supplied to the internal parity processing unit 106, the parity which is an internal error correction code (ECC) in units of sync blocks output from the format signal generator 107. Is charged.

The data imparted with internal and external parity through the above process is supplied to the channel interface unit 109 and mixed with the copy protection signals copy_inhi input through the information insertion unit 108 and then output to the outside. Recorded on a tape-like record.

That is, the channel interface unit 109 imposes a synchronization pattern, tape information, an identification code, and the like on the data output from the internal parity processing unit 106 and performs scrambling and precoding on the signals.

2 is a detailed block diagram showing an embodiment of the information insertion unit 108. Referring to this, the operation of the information insertion unit 108 will be described in more detail as follows.

The copy existence determination unit 201 checks whether a copy protection signal (copy_inhi) is input from the outside and generates a copy protection code (cpt_c), a set number (set_no), and an inserted card number (card_no) when the signal is input. The signals generated in this way are mixed in a predetermined format by the control signal CS in the multiplexer 202 and output to the channel interface unit 109.

3 shows a format of a sync block in which actual image data is recorded, and a format of information for copy protection. That is, the sync block is composed of a sync pattern, tape information, video data, and an error correction parity area, and the tape information area is copy prohibited information. (copy inhibit), set infor, card infor, an ID code indicating the position of the track and sync block on which the image data is recorded, and an error in the preceding codes. ID parity for correction.

On the other hand, referring to Figure 4 will be described the generation process of the recording signal according to the present invention.

When data is being input, it is not necessary to give a copy protection function to the program currently being recorded. If a copy protection signal (copy_inhi) is not input, a specific code (code1) is inserted into the input data and unauthorized copying is prohibited. In order to input the copy protection signal copy_inhi, the signal copy_inhi and the set number set_no are inserted and then the user's card is inserted.

If it is determined that the card is not inserted as a result of the above check, another specific code (code2) is inserted into the input data so that the state can be checked during playback or copying, and if the card is found to be inserted, the card number (card_no) Is inserted into the tape information area and output to the recording medium side such as a tape.

On the other hand, referring to Figure 5 will be described the reproduction process of the data already recorded on the recording medium.

When data reproduced from a storage medium such as a tape is supplied to the information retrieval unit 108A through the channel interface unit 109, the information retrieval unit 108A retrieves the tape information area of the input data, and as a result, If the control code is normally detected, the reproduction permission signal PERMIT is output to the memory controller 104.

As a result, the memory 103 is normally operated by the memory controller 104 and deshuffled in the opposite manner. In this case, after the error is corrected by the external parity processing unit 105, the buffer buffer 102 and the tape interface unit are fixed. Is output via 101.

However, when various control codes are not normally detected by the information retrieval unit 108A, the reproduction permission signal PERMIT is not output therefrom, and accordingly the use of the memory 103 by the memory control unit 104 is performed. This is forbidden. Therefore, playback data cannot be output.

6 is a detailed block diagram illustrating an embodiment of the information retrieval unit 108A. Referring to this, the operation of the information retrieval unit 108A will be described in detail as follows.

When the control signal generator 601 receives a reference signal (ref_sig) and data (data) such as a sync signal (sync), the information check area is searched and the copy protection code (cpt_c), set number (set_no), and inserted card. If the number card_no exists, these are read out and output, and the reproduction permission determination unit 602 plays back to the memory control unit 104 only when the codes cpt_c, set_no, and card_no are normally input. Allow signal (PERMIT) is output.

On the other hand, referring to Fig. 7, the reproduction signal reproduction process according to the present invention will be described as follows.

When the specific code code1 is detected by searching the input data, the program is not provided with a copy prohibition function, so that the program is reproduced as it is to generate output data. For reference, in order to prevent an error, reproduction may be allowed only when a specific code code1 is detected N times in succession.

However, if the specific code code1 is not detected in the above and the same number as the current set is detected, this is a program recorded in the same set, so that normal playback processing is possible.

However, if the set number is different and a specific code (code2) is detected, this means that it is not played in the same set but is a different set, and thus reproduction is not allowed. However, if the specific code code2 is not detected and the detected card number is found to be the same as the card number currently inserted, normal playback processing is made possible.

In conclusion, no card is required for recording and reproducing on the same set, but other than that, a card used at the time of recording is required for reproducing on another set. In another set, a legal copy requires a card whose fees are settled over time. An example of such a card is a rechargeable card in which a certain amount is recorded.

As another embodiment, in the same set, the system which collects the fee according to the reproduction time can be made to ignore the set number check.

As described in detail above, the present invention mixes and records a set number, a card number, and data related to copy prohibition during digital data recording, and checks the numbers during reproduction to allow reproduction or copy only when a condition is satisfied. There is an effect that can prevent the illegal use of digital data that requires copyright protection.

Claims (2)

A memory control unit 104 having a control function to store image data input through the tape interface unit 101 and the buffer buffer 102 in the memory 103 in units of shuffle; An external parity processing unit (105) for imposing external parity on data stored in the memory (103); An internal parity processing unit (106) for imposing internal parity in units of sync blocks output from a format signal generator (107) to data imposed with external parity output from the memory (103); An information insertion unit 108 for generating various control codes for unauthorized copy protection when a copy protection signal copy_inhi is input; Copy protection and charge in a storage medium, characterized in that the channel interface unit 109 for inserting and outputting the various control codes output from the information insertion unit 108 to the data output from the internal parity processing unit 106 Charging device. The information insertion unit 108 of claim 1, wherein the information insertion unit 108 generates a copy protection code (cpt_c), a set number (set_no), and an inserted card number (card_no) when a copy protection signal (copy_inhi) is input. 201; In the storage medium, characterized in that the output signal (cpt_c), (set_no), (card_no) of the copy existence determining unit 201 is composed of a multiplexer (202) for mixing and outputting in a predetermined format according to the control signal (CS). Copy protection and charging equipment.