KR100970636B1 - Method for recording/playing by grade in multi unit digital satellite broadcasting receiver - Google Patents

Abstract

The present invention tunes multiple channels simultaneously through one main unit, and not only the main unit but each sub unit in a plurality of independent spaces receives a program of a specific channel tuned in the main unit to perform decoding and display. When a storage medium such as an HDD is installed in the main unit and a program is recorded on the HDD by a digital broadcast receiver that allows the main unit and the sub unit to share the HDD, together with the identifier and / or the user identifier of the unit that set the recording. By adding the rating information, you can prevent other units or other users from playing or editing / deleting programs recorded on the HDD freely.In addition, if you record adult or violent materials, children are not allowed to play them. You can stop it.

Main unit, N subunits, HDD, rating

Description

Method for recording / playing by grade in multi unit digital satellite broadcasting receiver}

1 is a conceptual block diagram of a digital satellite broadcast receiver according to the present invention;

Figure 2 is a detailed block diagram of the main unit of Figure 1

3 is a diagram illustrating an example of a reservation recording setting screen according to the present invention.

4A and 4B are flowcharts illustrating an example of a recorded program list screen on which a rating is set when a program is recorded on an HDD and a program list screen of which a rating is released in a digital satellite broadcasting receiver according to the present invention.

5 is a flowchart illustrating an example of a recording / reproducing method for each grade in the digital satellite broadcasting receiver according to the present invention.

6A and 6B are flowcharts illustrating examples of a recorded program list screen on which a password is set and a program list screen on which a password is released when a program is recorded on an HDD in a digital satellite broadcasting receiver according to the present invention.

7A and 7B are flowcharts illustrating an example of a recorded program list screen in which a password is set when a program is recorded on an HDD and a program list screen in which a password is released but not released in the digital satellite broadcasting receiver according to the present invention.                 

Explanation of symbols for main parts of the drawings

101: satellite antenna 102: LNB

103: multi-switching unit 110: main unit

200: CPU 210: multi tuner unit

220: multi-channel TP distribution unit 230: A / V decoder

240: modem 250: CAS unit

260: encryption engine 270: EPG DB

280: main transceiver 290: HDD

The present invention simultaneously tunes multiple channels through a main unit having a storage medium and a multi tuner, and simultaneously tunes different channels tuned in the main unit in each of the sub units and the main unit installed in a plurality of independent spaces. The present invention relates to a digital satellite broadcasting receiver that enables viewing, and in particular, when a recording command is input from each unit of the digital satellite broadcasting receiver, an identifier and a rating of the corresponding unit are assigned to a recording program and stored in the storage medium, thereby allowing an unspecified user The present invention relates to a graded recording / reproducing method in a digital satellite broadcasting receiver which prevents playing a specific program.

In general, digital satellite broadcasting has been rapidly spread to Europe, Japan, Asia, and Africa since the world's first DirecTV in 1994, and can be viewed anywhere in the world. Digital satellite broadcasting is a method of compressing video / audio / additional data and transmitting digitally through satellites in MPEG 2 standard, and is related to a wide coverage area and region which are inherent to satellites compared to other transmission media. Due to the lack of equal broadcasting quality, economics of establishing a satellite broadcasting network, and simplicity of satellite channels, it is mainly led by pay broadcasting companies.

In addition, the receiver capable of receiving the digital satellite broadcast employs a CAS (Conditional Access System) that restricts the reception so that only subscribers can receive the pay broadcast.

The CAS receives a TV program and a data service signal scrambled by a transmitting station in a receiver for pay per channel (PPC) or pay per view (PPV) other than the free and basic channel of satellite broadcasting. It is a system for managing authorized subscribers to receive service by descrambling using a smart card. Here, the PPC is a service that collects a predetermined fee for receiving a channel and is able to receive a broadcast, and the PPV is a service that calculates and charges a fee per program as a reception time. To this end, the CAS operator issues a smart card to the subscriber. The smart card is also referred to as a CAM (Conditional Access Module).

The smart card stores, for example, channel information that a user can view in the memory portion in the case of a pay channel, and usage information in the case of a PPV.

The PPV service allows the user to pre-purchase a movie or sporting event, for example. That is, the user may purchase a paid viewing program through the smart card.

Therefore, it is possible to extract the information stored in the smart card at the request of the limited reception system operator or the receiver. Also, the smart card has a decryption function that can descramble the scrambled signal. Provide the required key.

The digital satellite broadcast includes not only a program but also program guide information. The program guide information is called APG (Advanced Program Guide) in digital satellite broadcasting such as DirecTV, and EPG (Electronic Program Guide) in digital terrestrial broadcasting. The program guide information is additional data information that allows the viewer to more conveniently use the TV to watch TV, and the viewer can obtain information about the current broadcast program and the future broadcast program directly on the screen without a newspaper or other guide medium. .

On the other hand, as people's income levels rise and their lives get better, nowadays, it is common to have more than one television in a household.

However, conventionally, in order to receive digital satellite broadcasts of a plurality of televisions in a home, a satellite broadcast receiver (Integrated Receiver &Decoder; IRD) must be installed for each TV and a smart card is issued, thereby increasing the user burden including subscription fee. . That is, a smart card is issued with one smart card per IRD to limit illegal viewing of non-subscribers.                         

In addition, when a user purchases a pay-per-view program such as a movie or a sports event through a two-way communication with a satellite broadcasting service provider, a modem is required. In the conventional case, a modem is installed for each IRD. There was this.

Accordingly, in order to solve this problem, the present applicant has a display device, a storage medium (for example, an HDD), a CAS unit, and a modem, and installs a main unit capable of simultaneously tuning multiple channels at a specific location in the home. The sub unit, which is installed in a plurality of independent spaces and has a display device, receives a specific channel tuned from the main unit, performs decoding and display, and records the necessary program by sharing the storage medium with the main unit. It has applied for a digital satellite broadcasting receiver (application number: 2003-39214, filing date: 2003.06.17; hereinafter referred to as '39214') to enable.

In the 39214, the HDD is installed only in the main unit, and the main unit and each sub unit share the HDD so that scheduled recording or real time recording can be performed.

However, in the above-mentioned satellite broadcasting, cable broadcasting, terrestrial broadcasting, etc., there may be a program that is difficult to watch by a certain layer. Especially in families with children, it is important to prevent children from watching programs that are inappropriate for children, such as violence or adult programs. However, when storing such a program in the HDD, only the program is stored as it is, without class information.

Therefore, no matter how the grade is set in the satellite broadcasting receiver, it does not affect the reproduction of the program stored in the HDD, and thus there is a problem in that it is not possible to restrict children from watching adult or violent programs recorded on the HDD.

In addition, when recording a program on the HDD as described above, each unit cannot prohibit other units or users from editing or playing their own programs recorded on the HDD.

An object of the present invention is to give a program to be recorded in the main unit or a sub unit in a digital satellite broadcasting receiver such as the '39214' described above to give the program to be recorded to the recording medium by recording the identifier and class of the unit In addition, the present invention provides a method of recording / reproducing by grade in a digital satellite broadcasting receiver that restricts viewing of a recording program of a specific unit.

According to another object of the present invention, when a recording command is input from a main unit or a sub unit in a digital satellite broadcasting receiver such as '39214', an identifier and a password of the corresponding unit are assigned to a program to be recorded and recorded on the storage medium. Accordingly, the present invention provides a method of recording / reproducing by grade in a digital satellite broadcasting receiver which limits viewing of a program of a specific unit.

In order to achieve the above object, a recording / reproducing method for each grade of a digital satellite broadcasting receiver according to the present invention includes an HDD, a display device, a CAS unit, and a modem, and a tuned channel after simultaneously tuning a plurality of received channels. The main unit for demodulating, descrambled, and then encrypting and outputting the programs of the program, and the CAS unit, the modem, and the HDD are not provided, but are installed in separate spaces together with the display device to receive a program of a specific channel from the main unit. A recording / reproducing method according to a grade of a digital satellite broadcasting receiver composed of a plurality of subunits which are decoded, decoded, displayed, and share the HDD with the main unit, the method comprising: (a) a subunit of any one of a main unit and a plurality of subunits; In the unit, users can use the menu screen to record programs or record programs. Setting recording information including unit identifier, class information, channel, date, and time to be added to the sub-unit, and transmitting the set recording information to the main unit, (b) the main unit recording information of each unit; Determining whether the recording time has been reached by comparing the current time information with the stored recording information, and storing the stored time information; and (c) if the main unit is determined as the recording time, the program of the reserved channel set in the recording information corresponding to the recording time. Adding the identifier and the class information of the corresponding unit to the recording in the HDD for a set time; and (d) inputting the unit identifier from the user when the main unit or one of the sub-units selects playback of the program recorded in the HDD. Receiving step, and (e) releases only the rating of the program corresponding to the unit identifier input in the above step, and then the entire recording program Displaying a list, and (f) performing a normal playback when selecting a program whose rating has been released from the recorded program list screen, and limiting playback according to the rating when selecting a program whose rating has not been released. Characterized in that made.

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In step (d), if the user selects the playback after receiving the user authentication with the ID and password of the corresponding unit in the specific unit, only the program corresponding to the authenticated unit identifier is released, and then displaying the list of all recorded programs. It is characterized by including.

In the step (e), if the input unit identifier is an identifier of the main unit, the method may further include displaying a list of all recorded programs after deactivating all programs.

If an identifier is stored for each user in the smart card of the CAS unit, the step (a) further includes selecting a user identifier to be added to a program to be recorded when setting recording information, and the step (c) includes recording time. If it is determined that the recording time corresponding to the recording time is added to the program of the reserved channel set to the real user identifier further comprises the step of recording on the HDD, the step (d) is the playback of the program recorded on the HDD If selected, further comprising the step of receiving a user identifier from the user, wherein step (e) further comprises the step of releasing only the grade of the program corresponding to the input user identifier and displaying the entire program list. .

The step (a) further includes a step of inputting a password to be added to the program to be recorded when the recording information is set, the step (c) is to add the password to the program of the reserved channel to record on the HDD In addition, the step (e) is characterized in that the program is granted a password on the recorded program list screen, the access is allowed only when the password is correctly entered.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

Hereinafter, with reference to the accompanying drawings illustrating the configuration and operation of the embodiment of the present invention, the configuration and operation of the present invention shown in the drawings and described by it will be described as at least one embodiment, By the technical spirit of the present invention described above and its core configuration and operation is not limited.

1 is a conceptual block diagram of a digital satellite broadcasting receiver disclosed in '39214', wherein an antenna 101 capable of receiving a digital satellite broadcast in a high frequency band and a satellite in a high frequency band received through the antenna 101 are shown in FIG. A low noise amplifier (LNB) 102 for low noise amplifying a signal, a multi-switching unit 103 for dividing a plurality of satellite signals output from the LNB 102 through each path, and a storage medium HDD is mounted, and the multi-switching unit 103 receives a plurality of satellite signals output through each path, and tunes and demodulates each channel to a channel required by each sub-unit through a multi tuner to form a transport stream (TP). After conversion to the main unit or the sub-unit of the plurality of sub-units stored in the HDD, or the demodulated TP signal or the TP signal stored in the HDD It is installed in a main unit 110 and a separate space, each of which is rammed and outputted to each sub unit, and requests channel selection or purchase information from the main unit, or requests recording and playback of a specific program from an HDD mounted in the main unit. It is composed of a plurality of sub-units (121, 122, ...) that receives the stream of a specific channel descrambled from the main unit 110, A / V decoded and displayed.

2 is a detailed block diagram of the main unit 110, the multi-tuner unit 210 is composed of a plurality of tuners and demodulators (211 ~ 21n), which is output through each path from the multi-switching unit 103 A satellite broadcast signal is received and simultaneously tuned to a channel required by a main unit or a plurality of subunits, demodulated, and output in a TP form.

The CAS unit 250 performs user authentication and descrambling of the main unit and each subunit using the integrated smart card.

At this time, the main unit is equipped with an HDD 290, in the main unit and / or each sub unit, the user can select at least one or more of the recording / playback / display of the currently received broadcast program by reservation or real time. According to the selected value, the multi-channel TP distribution unit 220 outputs and stores the TP stream corresponding to the recording of the TP streams output from the multi-tuner unit 210 to the hard disk 290 and corresponds to the display. The TP stream is output to the CAS unit 250 to perform descrambling, and then distributed to transmit the descrambled stream signal to the TV connected to the main unit and each sub unit. In addition, when the TP stream corresponding to the reproduction is read from the HDD 290, the TP stream is output to the CAS unit 250 to perform descrambling, and then the descrambled stream signal is output to the unit requesting reproduction. The central processing unit (CPU) 200 controls the overall operation of the main unit according to the request of the main unit and each subunit, and also controls the main unit and the satellite broadcasting service provider and the main unit and each subunit. It controls data communication and controls program recording and playback to the HDD 290. In addition, the A / V decoder 230 receives a stream of the main unit, which is descrambled and output from the multi-channel TP distribution unit 220 under the control of the CPU 200, and separates the stream into an audio and video stream. The decoded audio stream and the video stream respectively by a corresponding decoding algorithm and output to a display device (ie, a TV) connected to the main unit 110 for display.

The encryption engine 260 receives the stream of each subunit descrambled by the multi-channel TP distribution unit 220 under the control of the CPU 200 and performs encryption using a predetermined encryption algorithm. The main transceiver 270 transmits the stream encrypted by the encryption engine 260 to each sub unit, or receives recording information, user authentication information, channel selection information, and purchase information transmitted from each sub unit. Output to the CPU 200. The modem 240 is installed only in the main unit 110 and receives user authentication and purchase information transmitted from each sub unit through the CPU 200 and transmits the received information to the satellite broadcasting service provider, and transmits the related information from the satellite broadcasting service provider. It receives and outputs to the CPU (200).

Each sub unit is a sub IRD (Integrated Receiver & Decoder) that receives an encrypted stream signal transmitted from the main unit 110, decrypts it with a predetermined decryption algorithm, and restores the original digital video and audio signal. A display device (e.g., a TV) for displaying the video signal is connected and does not have a satellite tuner, modem, HDD and CAS.

Here, the main unit 110 and each sub unit 121, 122, ... may be connected by wire or wirelessly. When the main unit and each sub unit are wirelessly connected, there is no need for a cable between the main unit and each sub unit, which makes it easy to install, move, and add each sub unit.

Like the modem, the CAS unit 250 is also installed in the main unit 110 without being installed in each sub unit, and the smart card inserted into the CAS unit 250 is a family smart card. In this case, the satellite broadcasting service provider may provide a subscriber service such as discounting the subscription fee according to the number of sub units controlled by the main unit.

The smart card manages information related to user registration, authentication, and billing through data communication between the main and sub units and the satellite broadcasting service provider, and stores a decryption key for descrambling scrambled data. .

In addition, only one ID and password may be registered in the smart card, or an ID and password may be registered for each main unit and each subunit.

For example, when only one ID and password are registered in the smart card, the main unit and the main unit may be authenticated by inputting the ID and password registered in the smart card only in the main unit. All subunits connected to the unit can be logged on normally. As another example, in the main unit and any subunits, the user ID may be input by entering the ID and password registered in the smart card, and when the user authentication is performed, the main unit and all subunits may be normally logged on.

If an ID and password are registered for each main unit and each subunit in the integrated smart card, the corresponding subunit may receive user authentication through the main unit after inputting its ID and password. In this case, security can be kept secure for each subunit.

For example, assuming that IDs and passwords are registered for each main unit and subunit in the smart card, the ID and password inputted by the user in subunit B are transmitted to the main unit, and the main unit is transferred from the smart card of the CAS unit. The ID and password of the sub unit B are read, and if the ID and password transmitted from the sub unit B are compared and matched, the sub unit B transmits a signal indicating that user authentication has been performed. Then, the sub unit B is logged on and can be used normally.

In this case, the ID and password of the main unit may be able to receive user authentication in any sub unit as well as the main unit, for example, may be used by the parent. That is, the ID and password of a sub unit may receive user authentication only in the corresponding sub unit, but the ID and password of the main unit may receive user authentication in all sub units as well as the main unit.

In addition, the smart card may store the ID and password for each actual user. In this case, the user can enter the user ID and password in any unit and receive a user-configured broadcast when the user is authenticated.

In this case, the HDD 290 is installed in the main unit, and the main unit and each sub unit may share the HDD 290 to perform reservation recording or real-time recording.

Here, the scheduled recording or real time recording can be set by the user in the main unit or the sub unit, and the recording information set in each sub unit is transmitted to the main unit. The user authentication of the main unit or each subunit may use the ID and password of the main unit or subunit, or may use a user ID and password registered for each actual user.

In one embodiment, if the user ID and password are authenticated when setting the scheduled recording or real time recording in each sub unit, the user ID and password are transmitted to the main unit together with the set recording information, and the ID and password of the corresponding sub unit. Upon authentication, the ID and password of the corresponding subunit may be transmitted to the main unit together with the set recording information.

In another embodiment, when setting the scheduled recording or real-time recording in each unit, the identifier and / or user identifier of the desired unit may be selected on the recording setting screen. Here, both the identifier and the user identifier of the desired unit may be selected or only one of them may be selected. At this time, the selected identifier is included in the recording information.

In addition, the present invention makes it possible to select rating information at the time of recording setting.                     

In the present invention, for convenience of description, the use of grade information such as unlimited (grade1), impossible to edit / delete (grade2), and impossible to reproduce (grade3) is used as an embodiment.

Here, the rating information may be rating information arbitrarily set by the user as described above, may be rating information specified in the rating standard of the satellite broadcast, or rating information of the rating information set in the rating specification of the satellite broadcasting set by the user. It may be a combination, which may be modified by those skilled in the art and thus will not be limited to the examples given above.

3 is a diagram illustrating an example of a reserved recording setting screen according to the present invention, wherein a unit selection item is an item for selecting a unit (ie, a main unit and each subunit) to which an identifier is to be added to a program to be recorded. A unit identifier for displaying each unit is displayed. Here, each unit identifier may be set by a user or automatically set by the system. For example, the user may set the sub unit in the child room as the child name or the room name. In addition, the system may set the ID of the unit as a unit identifier.

Also, the class selection item is for selecting a class to be added to the program to be recorded.

In the case of FIG. 3, the unit is a unit having an identifier, the class is not playable, the channel is set to 201, the date is June 12, the time is 5 pm, the recording time is 10 minutes, and the repetition is set to one example. to be.

In the case of real time recording, an ID, for example, an ID or a user identifier of the corresponding unit, is transmitted to the main unit together with real time recording information.

Meanwhile, the main unit checks its own recording information and the recording information of each subunit, and when the recording time is set in the main unit or any one subunit, the reservation channel included in the recording information including the recording time is included. After the program is tuned and demodulated, the identifier and the class information of the unit included in the recording information are added to the demodulated program and stored in the HDD.

That is, a program in which the identifier and the class information of a specific unit are added to the HDD is stored as shown in FIG. 4A. In the example of FIG. 4A, the unit a has a grade of 'unlimited (grade1)' in Contents1, a grade of 'non-edit / delete (grade2)' in Contents4, and a 'grade1' grade in Contents7. Able to know.

FIG. 5 is a flowchart illustrating a process of recording and playing back a HDD by adding a unit identifier and class information to a program to be recorded according to the present invention, wherein the main unit or any one of a plurality of sub units is recorded on the HDD. The reserved recording information including the program to be programmed, the unit identifier, and the class information is set (step 501). At this time, if the recording information is set in the sub unit, the set recording information is transmitted to the main unit. The main unit stores the recording information transmitted from itself or the sub unit, and then periodically compares the set recording information with the current time received from the broadcasting station. Then, when the recording time set in any one of the recording information reaches the recording time, the reserved channel set in the corresponding recording information is tuned and demodulated. Save (step 502). For example, if the scheduled recording is set as shown in FIG. 3 in the sub-unit B, the set recording information is transmitted to the main unit, and in the main unit, at 5 pm on June 12, 201 channels are tuned and demodulated and demodulated. The identifier (unit a) and grade information (grade 3) of the sub unit B are added to the program of the channel and stored in the HDD.

Thereafter, when the user selects playback in the main unit or one subunit (step 503), the unit receives a unit identifier from the user (step 504). After checking whether the program having the input unit identifier is recorded in the HDD, if it is recorded, the entire program list in which only the class of the program having the unit identifier is released is displayed on the screen (step 505).

If the user selects the program list of the de-rated unit on the program list display screen (step 506), playback of the selected program is normally performed (step 507).

On the other hand, if the user selects a program list of another unit whose rating is not released on the program list display screen (step 508), playback and editing / deletion of the selected program is restricted according to the set rating information (step 509).

4B illustrates an example of a program list screen in which only a program of the unit a is released when the user selects a unit having an identifier of a after selecting playback in the main unit or one sub-unit.

Here, if a program list having an identifier of a is selected, normal playback is performed, and if a program list having an identifier of b and c is selected, playback and editing / deletion are restricted according to the grade information set in the program. For example, if Contents5 is selected in FIG. 4B, playback is not performed because the selected content, that is, the grade of the program, is not playable (grade3).

In this case, if the identifier of the main unit (for example, the ID and password of the main unit) is input on the unit identifier input screen after the reproduction selection, the entire program list may be displayed after the class of all programs stored in the HDD is released. In other words, all programs stored in the HDD can be played normally regardless of the class. This is the case where the identifier of the main unit is set to the master identifier used by the parent or the like. In addition, when the user ID and password are assigned, the user ID and password used by the parent and the like can be set as the master identifier. In this case, all programs stored in the HDD can be deregistered. Here, a plurality of master identifiers may be set.

When the user receives the user authentication with the ID and password of the corresponding unit in a specific unit and selects play, the user does not receive a separate unit identifier and automatically releases only the grade of the program corresponding to the authenticated unit identifier. You can also display a list. The same can be applied to the case where the user ID and password are authenticated.

As described above, the present invention is very useful when giving a unit identifier and class information to a program to be recorded, and recording the program, so as not to keep the recorded program or to prevent other people or units from editing or deleting at will.                     

On the other hand, the present invention may be recorded by giving a password to a program to be recorded on the HDD as another embodiment.

In other words, when accessing a program recorded on the HDD, if the program has a password, the password must be passed to allow access.

FIG. 6A illustrates an example of a list of programs recorded on the HDD by being given a password, and a user may input a password when recording is set on the recording setting screen as shown in FIG. 3. When the program of recording information containing a password is recorded on the HDD, the above-mentioned password is also recorded.

6A shows an example in which different passwords are input for each program. For example, the contents 2 by b, which are not given a password, may be reproduced only in the unit b or may be reproduced without inputting a password.

For example, when the user selects contents1 in the program list screen of FIG. 6A, a message for inputting a password is displayed on the screen. At this time, when the user enters the password corresponding to the password 1, the password is released as shown in Figure 6b and the reproduction of the program called contents1 is normally performed. If an incorrect password is input, the program corresponding to contents1 is not played.

You can also set the right to delete and edit programs, even after passing the password. In other words, the password is set in the program and the rating is recorded on the HDD. If it is assumed that the unit identifier, class, and password are stored in the program recorded on the HDD, the correct password and unit identifier must be input in order to play the program normally.

7A shows an example of a program list in which the same password is given to a program of the same unit.

For example, when the user selects contents1 in the program list screen as shown in FIG. 7A, a message for inputting a password is displayed on the screen. In this case, when the user inputs a password corresponding to the password a, the programs having the password a (contents 1, contents 4 and contents 7) as shown in FIG. 7B may be normally played. If a grade is set for each program, the grade is set on the list of programs whose password is released.

Therefore, even if the password is released, the identifier of the unit must be input again to play the program normally. For example, in order to play the program corresponding to contents1, the password a and the identifier of the unit a must be entered correctly.

Meanwhile, in the present invention, when the program is recorded on the HDD, the unit identifier is stored together, but instead, the identifier for each user may be stored instead of the unit identifier.

Terms used in the present invention are terms taken in consideration of functions in the present invention, which may vary according to the intention or custom of those skilled in the art and the definition should be made based on the contents of the present invention. will be. In addition, in the present invention, 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, a person having ordinary knowledge in the art can easily and other embodiments of the present invention. Since other modifications may be made, it is obvious that both the embodiments and the modifications used in the above description belong to the claims of the present invention.

As described above, according to the recording / reproducing method for each grade in the digital satellite broadcasting receiver according to the present invention, the multi-channel is simultaneously tuned through one main unit, and each sub unit in the plurality of independent spaces as well as the main unit is Receives a program of a specific channel tuned from the main unit to perform decoding and display, and installs a storage medium such as an HDD in the main unit and shares the HDD in the main unit and the sub-unit. When recording a program, recording the program recorded on the HDD by other units or other users or editing / deleting it by adding recording information along with the class information along with the identifier and / or the user identifier of the unit that set the recording. You can stop it. In particular, when recording adult or violent material, children can be prevented from playing. In addition, the recording may be performed by adding a password instead of the rating, or by recording a password and rating information together. In this case, access of other units or users may be more firmly restricted.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention.                     

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (7)

Conditional Access System (CAS) that registers HDDs, display devices, unit-specific identifiers, performs user authentication and descrambling, and modems that send and receive information to and from satellite broadcasters. After demodulating and descrambled the program of the tuned channel, and encrypting and outputting again, the CAS unit, the modem, and the HDD are not provided. A recording / reproducing method for each grade of a digital satellite broadcasting receiver comprising a plurality of sub-units received from a main unit, decoded, decoded, and displayed. (a) In any sub unit of the main unit or a plurality of sub units, a user can select a program, a grade information, a channel, a recording date, and a recording to be recorded through a menu screen. Setting recording information including a time and a unit identifier to be added to the recording program, wherein the sub unit transmits the set recording information to the main unit; (b) the main unit storing recording information of each unit and comparing current time information with stored recording information to determine whether the recording time is reached; (c) if the main unit is determined as the recording time, adding the identifier and class information of the corresponding unit to the program of the reserved channel set in the recording information corresponding to the recording time, and recording on the HDD for the set time; (d) receiving a unit identifier from a user when the main unit or any one sub-unit selects playback of a program recorded on the HDD; (e) only releasing the class of the program corresponding to the unit identifier input in the step, and then displaying a list of all recorded programs; And (f) selecting a program whose rating has been released from the recorded program list screen to perform normal playback, and when selecting a program whose rating has not been released, limiting the playback according to the set rating. Class recording / playback method in satellite broadcasting receiver. Conditional Access System (CAS) that registers HDDs, display devices, unit-specific identifiers, performs user authentication and descrambling, and modems that send and receive information to and from satellite broadcasters. After demodulating and descrambled the program of the tuned channel, and encrypting and outputting again, the CAS unit, the modem, and the HDD are not provided. A recording / reproducing method for each grade of a digital satellite broadcasting receiver comprising a plurality of sub-units received from a main unit, decoded, decoded, and displayed. (a) In any sub unit of the main unit or a plurality of sub units, a user can select a program, a grade information, a channel, a recording date, and a recording to be recorded through a menu screen. Setting recording information including a time and a unit identifier to be added to the recording program, wherein the sub unit transmits the set recording information to the main unit; (b) the main unit storing recording information of each unit and comparing current time information with stored recording information to determine whether the recording time is reached; (c) if the main unit is determined as the recording time, adding the identifier and class information of the corresponding unit to the program of the reserved channel set in the recording information corresponding to the recording time, and recording on the HDD for the set time; (d) If a specific unit receives user authentication through the CAS unit of the main unit with the ID and password of the unit, and selects playback of a program recorded on the HDD, only the grade of the program corresponding to the set identifier of the authenticated unit is released. Displaying a list of recorded programs after the recording; And (e) selecting a program whose rating has been released from the recorded program list screen to perform normal playback, and when selecting a program whose rating has not been released, limiting the playback according to the set rating. Class recording / playback method in satellite broadcasting receiver. The method of claim 1, wherein step (e) If the input unit identifier is the identifier of the main unit, further comprising the step of de-rating all programs and displaying a list of the entire recorded program, characterized in that the recording / playback method according to the grade in the digital satellite broadcasting receiver. Conditional Access System (CAS) that registers HDDs, display devices, unit-specific identifiers, performs user authentication and descrambling, and modems that send and receive information to and from satellite broadcasters. After demodulating and descrambled the program of the tuned channel, and encrypting and outputting again, the CAS unit, the modem, and the HDD are not provided. A recording / reproducing method for each grade of a digital satellite broadcasting receiver comprising a plurality of sub-units received from a main unit, decoded, decoded, and displayed. (a) setting real-time recording by setting grade information in any one of a main unit or a plurality of subunits; (b) the main unit recording on the HDD by adding identifier and class information of a unit for which real-time recording is set to a corresponding program; (c) receiving a unit identifier from a user when selecting one of a main unit or a plurality of subunits to play a program recorded on the HDD; (d) only releasing the class of the program corresponding to the unit identifier input in the step, and then displaying a list of all recorded programs; And (e) selecting a program whose rating has been released from the recorded program list screen to perform normal playback, and when selecting a program whose rating has not been released, limiting the playback according to the set rating. Class recording / playback method in satellite broadcasting receiver. The method of claim 1, The step (a) further comprises the step of inputting a password to be added to the recording program at the time of recording information setting, The step (c) further includes the step of recording on the HDD by adding the password to the program of the reserved channel, The step (e) further includes displaying a list of recorded programs by displaying whether a password is added to a specific recorded program, In step (f), if a program to which a password is added is displayed, a message for inputting a password is displayed on the screen, and if the correct password is input, the program is normally played. Rating recording / playback method in a digital satellite broadcast receiver comprising a. HDD, display device, user-specific identifiers are registered, CAS (Conditional Access System) which performs user authentication and descrambling, and modem which transmits and receives information with satellite broadcasting service provider. After demodulating and descrambled the program of the tuned channel, and then encrypting and outputting again, the CAS unit, the modem, and the HDD are not provided, but are installed in a separate space together with the display device, respectively, to store the program of a specific channel. A recording / reproducing method for each grade of a digital satellite broadcasting receiver comprising a plurality of sub-units received from a unit, decoded, decoded, and displayed. (a) The program, rating information, channel, recording date, recording can be recorded by the user through one of the main unit and a plurality of sub units. Setting recording information including a time, an actual user identifier to be added to the recording program, and the sub unit transmitting the set recording information to the main unit; (b) the main unit storing recording information of each unit and comparing current time information with stored recording information to determine whether the recording time is reached; (c) if the main unit is determined to be a recording time, adding the identifier and class information of the corresponding user to a program of a reserved channel set in the recording information corresponding to the recording time, and recording on the HDD for a set time; (d) receiving a user identifier from a user when selecting to play a program recorded on the HDD; (e) releasing only the grade of the program corresponding to the user identifier input in the step, and then displaying a list of all recorded programs; And (f) selecting a program whose rating has been released from the recorded program list screen to perform normal playback, and when selecting a program whose rating has not been released, limiting the playback according to the set rating. Class recording / playback method in satellite broadcasting receiver. Tuning multiple channels simultaneously, including HDD, display device, CAS (Conditional Access System) unit registered user ID and performing user authentication and descrambling, and modem transmitting and receiving information with satellite broadcasting service provider After demodulating and descrambled the program of the tuned channel, and encrypting and outputting again, the CAS unit, the modem, and the HDD are not provided. A recording / reproducing method for each grade of a digital satellite broadcasting receiver comprising a plurality of sub-units received from a main unit, decoded, decoded, and displayed. (a) The program, rating information, channel, recording date, recording can be recorded by the user through one of the main unit and a plurality of sub units. Setting recording information including a time, an actual user identifier to be added to the recording program, and the sub unit transmitting the set recording information to the main unit; (b) the main unit storing recording information of each unit and comparing current time information with stored recording information to determine whether the recording time is reached; (c) if the main unit is determined to be a recording time, adding the identifier and class information of the corresponding user to a program of a reserved channel set in the recording information corresponding to the recording time, and recording on the HDD for a set time; (d) If a specific unit receives user authentication through the CAS unit of the main unit with the ID and password of an actual user, and selects playback of a program recorded on the HDD, only the program level corresponding to the set identifier of the authenticated user is released. Displaying a list of recorded programs after the recording; And (e) selecting a program whose rating has been released from the recorded program list screen to perform normal playback, and when selecting a program whose rating has not been released, limiting the playback according to the set rating. Class recording / playback method in satellite broadcasting receiver.

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