KR100555756B1 - Method for recording reservation in combo system - Google Patents

Abstract

The present invention reserves and records broadcasts of scrambled channels. To this end, the present invention is different from the conventional method in which normal reservation recording cannot be performed when a CAM version is changed. Or, using a smart card, descrambles, and in a combo system including a set-top box and a VCR, checks whether a CAM is present at the time of reserved recording, and if a CAM is present, checks whether a received broadcast channel is a scrambled channel. If it is a scrambled channel, check whether it is the right version of CAM, and if it is a suitable version of CAM, descramble the broadcast channel to perform scheduled recording, or if it is not a suitable CAM version, stop the scheduled recording and alarm and record. By displaying the stop information, unnecessary reservation due to the change of the CAM version during the scheduled recording of the combo system Can be done to stop the screen, it is possible to achieve an intuitive user interface.

Description

Schedule recording method of combo system {METHOD FOR RECORDING RESERVATION IN COMBO SYSTEM}

1 is a block diagram of a combo system suitable for stopping scheduled recording and displaying information on alarm alarm and scheduled recording stop when there is no suitable version of CAM during scheduled recording according to the present invention;

2 is a flowchart illustrating a process of stopping scheduled recording and displaying information on alarm alarm and scheduled recording stop when there is no suitable version of CAM in a combo system including a set-top box and a VCR according to the present invention.

<Description of the symbols for the main parts of the drawings>

102 control means 104 tuning and demodulation means

106: demultiplexer means 108: CAM unit

110: descrambling means 112: decoding means

114: VCR unit

The present invention relates to a method of reserved recording of a broadcast of a scrambled channel. More particularly, the present invention relates to a reserved recording method of a combo system suitable for stopping scheduled recording when an authentication process fails in a combo system including a set-top box and a VCR. It is about.

As is well known, digital broadcasting includes digital terrestrial broadcasting, digital satellite broadcasting, and digital cable broadcasting, and digital broadcasting receivers such as a set top box (STB) for receiving them are used to receive digital broadcasting signals. Tuner, demodulator to demodulate received digital broadcast signal, demultiplexer and scrambled video and audio to descramble demodulated digital broadcast signal into video, audio and data It includes a descrambler for the configuration.

In addition, the A / V decoder for decoding the descrambled video and audio and outputting video and audio signals, the CAM (Conditional Access Module) for performing the descrambling operation, and each component means according to a user's key input. A CPU for controlling the operation and a memory for storing information necessary for controlling the operation of the CPU are included. The CAM may be included in or connected to the digital broadcasting receiver.

On the other hand, in a combo system including a set-top box and a VCR, the CAM needs to decode the scramble of a transport stream (TS) through authentication process due to the characteristics of the set-top box, but because a lot of software is patched The broadcast provider is changing the version of the CAM from time to time, and thus, if the CAM version is changed while the reserved recording is being performed, the authentication process fails and normal scheduled recording cannot be performed. Here, if the authentication process (that is, the descramble process) fails, recording continues, but normal broadcast signals are not recorded.

In addition, in a combo system including a set-top box and a VCR, in order to update the version of the CAM, the user must select and update the version manually. Therefore, the update of the CAM version is not practical at the time of the scheduled recording.

Therefore, conventional scheduled recording is not performed due to the occasional change of the CAM version during scheduled recording of a combo system including a set-top box and a VCR, and thus unnecessary broadcast signals (ie, unscrambled broadcasts) during scheduled recording. Signal) was recorded.

Accordingly, the present invention is to solve the above-mentioned problems of the prior art, and stops scheduled recording when normal scheduled recording cannot be performed due to a change in the CAM version during scheduled recording of a combo system including a set-top box and a VCR. And, the purpose is to provide a scheduled recording method of the combo system that can alarm the alarm.

In order to achieve the above object, the present invention provides a method for pre-recording a broadcast signal in a combo system having a CAM (Conditional Access Module) for broadcast signal descrambling, and checks whether the CAM exists at the time of reserved recording of the combo system. And checking whether the received broadcast channel is a scrambled channel when the CAM is present as a result of the check, checking whether the corresponding CAM version is the corresponding CAM version when the scrambled channel is present, and checking As a result, if the corresponding version of the CAM descrambling the broadcast channel to perform a scheduled recording, and if the check results, the scheduled recording stops and displays the alarm alarm and recording stop information It provides a scheduled recording method of the combo system comprising the step.

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

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

According to the present invention, unlike the conventional method in which normal scheduled recording cannot be performed when the CAM version is changed, the scheduled recording is performed when there is no suitable version of the CAM in the combo system including the set-top box and the VCR. By stopping and displaying information on alarm alarms and scheduled recording stops, it is easy to achieve the objectives of the present invention through this technical means.

1 is a block diagram of a combo system suitable for stopping scheduled recording and displaying information on alarm alarm and scheduled recording stop when there is no suitable version of CAM at the time of scheduled recording according to the present invention. Tuning and demodulation means 104, demultiplexer means 106, CAM portion 108, descramble means 110, decoding means 112 and VCR portion 114.

Referring to FIG. 1, the control means 102 includes, for example, a microprocessor, and performs overall operation control of a combo system including a set top box and a VCR, and to tune and demodulate transmitted broadcast signals. Transmits a control signal to the demultiplexer means 106, and transmits a control signal for separating the demodulated digital broadcast signal into video, audio and data, and transmits the scrambled video and audio signal. It transmits a control signal for descrambling to the descrambling means 110 and the like.

The control means 102 transmits a control signal for decoding the descrambled video and audio signals to the decoding means 112, and transmits a control signal for performing reserved recording to the VCR unit 114 for decoding. Record recorded video and audio signals on videotape;

In addition, the control means 102 checks whether the CAM version included in or connected to the set-top box (i.e., the digital broadcast receiver) is in accordance with the broadcast data transmitted according to the present invention, and if the CAM version is suitable, CAM authentication. After performing the process (i.e., descrambling), the broadcast signal is decoded to be recorded on the videotape.If the CAM version is not suitable, the scheduled recording is stopped after the scheduled recording is stopped. And outputs a control signal for generating a reserved recording stop information menu screen to a menu generating means (not shown), and displays it on a monitor (not shown).

In addition, according to the present invention, the control means 102 checks whether the CAM is not included or connected to the set-top box and whether the transmitted broadcast signal is a scrambled channel. And descrambling processing) to decode the transport stream of the broadcast signal to perform scheduled recording.

On the other hand, the tuning and demodulation means 104 receives a digital broadcast signal according to a control signal provided from the control means 102 and performs a function of demodulating the received digital broadcast signal to demultiplex the demodulated broadcast signal 106. ).

The demultiplexer means 106 separates the tuned and demodulated digital broadcast signal provided from the tuned and demodulated means 104 into video, audio, and data according to the control signal provided from the control means 102, and then the video and audio signal. Is transmitted to the descramble means 110, and the data is transmitted to the control means 102 to record (store) in an internal storage medium, for example, a memory. Here, the CAM unit 108 includes a CAM (Conditional Access Module) for descrambling the scrambled broadcast signal contained in or connected to the set-top box.

In addition, the descrambler 110 descrambles the video and audio signals separated by the demultiplexer means 108 according to the CAM information provided from the CAM unit 108 (that is, the authentication process using the CAM) and decodes the decode means. Descrambled video and audio signals are decoded and output through a monitor and speaker (not shown) or transmitted to the VCR unit 114 for recording.

Next, the VCR unit 114 performs the general VCR function of reproducing the image and sound data recorded on the magnetic tape such as video tape or recording the image and sound data input from the outside on the magnetic tape, while controlling the control means. A function of recording decoded video and audio signals in accordance with the control signal provided from 102 is performed.

Next, a description will be given of the process of stopping the scheduled recording and displaying information on the alarm alarm and the scheduled recording stop when there is no suitable version of the CAM due to the change of the CAM version in the combo system having the above-described configuration.

2 is a flowchart illustrating a process of stopping scheduled recording and displaying information on alarm alarm and scheduled recording stop when there is no suitable version of CAM in the combo system including the set-top box and the VCR according to the present invention.

Referring to FIG. 2, when recording a broadcast scheduled broadcast signal in a combo system including a set-top box and a VCR (step 202), the control unit 102 continuously communicates with the CAM unit 108 so that the CAM exists. It is checked if it is (step 204).

As a result of the check in the step 204, it is checked if the broadcast signal received is a scrambled channel when there is a CAM (step 206), and the descrambling means 110 in the control means 102 if the CAM does not exist. By transmitting the control signal, the authentication process using the CAM is skipped, the provided video and audio signals are decoded, and scheduled recording is performed (steps 208 and 220).

As a result of the check in step 206, when the received broadcast signal is a scrambled channel, the control means 102 checks whether the version of the CAM of the CAM unit 108 is suitable compared with the received broadcast data (step 210, if the received broadcast signal is not a scrambled channel, the control means 102 transfers the control signal to the descrambling means 110 to omit the authentication process using the CAM, and decodes the provided video and audio signals. After that, scheduled recording is performed (steps 208 and 220).

As a result of the check in step 210, if the version of the CAM is not suitable, the control means 102 transmits a control signal to the VCR unit 114 to stop the scheduled recording of the broadcast signal (step 212). The control signal is transmitted to a menu generating means (not shown) to generate a menu screen for reserved recording stop information (for example, the CAM version is not suitable, whether or not the CAM version is updated, and the reserved recording is re-executed), and the monitor is not shown. Displayed via, and outputs an alarm alert indicating that the scheduled recording is stopped through the speaker (not shown) (step 214).

On the other hand, as a result of the check in step 210, if the CAM version is suitable, the descrambling process (that is, the authentication process) is performed using the provided CAM for the scrambled channel, and the descrambled broadcast signal is decoded. Scheduled recording is performed (steps 216, 218, 220). Here, the CAM may be replaced with a smart card that provides an encryption key value required for the descramble process. The smart card may be included in the digital broadcast receiver or connected to the digital broadcast receiver.

Therefore, in the combo system including the set-top box and the VCR, if the appropriate version of the CAM does not exist in the scheduled recording, the unnecessary scheduled recording is stopped, and the menu for the scheduled recording stop information along with an alarm alarm indicating that the scheduled recording has been stopped. The screen can be displayed.

As described above, the present invention, unlike the conventional method in which normal scheduled recording cannot be performed when the conditional access modulation (CAM) version is changed, is a combo that descrambles using CAM and includes a set-top box and a VCR. The system checks whether the CAM exists at the time of the reserved recording, checks whether the received broadcast channel is a scrambled channel if the CAM exists, and checks whether the CAM is the appropriate version of the CAM, if it is a scrambled channel, In this case, scheduled recording is performed by describing the broadcast channel, or if it is not a suitable CAM version, the scheduled recording is stopped and alarm alarm and recording stop information is displayed. Recording can be stopped and a convenient user interface can be realized.

Claims (3)

A method of pre-recording a broadcast signal in a combo system having a CAM (Conditional Access Module) for broadcast signal descrambling, Checking whether the CAM exists at the time of the scheduled recording of the combo system; Checking whether the received broadcast channel is a scrambled channel when the CAM exists; Checking whether it is a corresponding CAM version when the channel is scrambled; Performing a scheduled recording by descrambling the broadcast channel in the case of the corresponding version of the CAM; If it is not the corresponding CAM version, stopping the scheduled recording and displaying alarm alarm and recording stop information. Schedule recording method of the combo system comprising a. The method of claim 1, The reserved recording method may further include, by bypassing the descrambling process of the broadcast channel when the CAM does not exist, decoding the transport stream of the broadcast channel, and then performing reserved recording. Way. The method of claim 1, The reserved recording method may further include, if the scrambled channel is not the scrambled channel, bypassing the descrambling process using the CAM of the broadcast channel to decode the transport stream of the broadcast channel, and then performing the reserved recording. Schedule recording method.

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