KR100694435B1 - System and method for setting pass word on the personal video recorder - Google Patents

Abstract

A password setup device in a PVR(Personal Video Recorder) and a method thereof are provided to insert a password into a PES(Packetized Elementary stream) of a descrambled broadcasting channel, and to convert the PES into a PS(Packetized Stream) to store the PS in a hard disk so that users of low rating are not able to freely watch the stored broadcasting channel. A TS(Transport Stream) demultiplexer(114) descrambles a TS of a received paid channel, and converts the descrambled TS into a PES. A password inserter(132) inserts a password inputted to the PES. A PS multiplexer(130) converts the PES, into which the password is inserted, into a PS. A hard disk(124) stores the converted PS. A microcomputer inserts the password into the PES of the TS demultiplexer(114), converts the PES into the PS, and stores the PS in the hard disk(124).

Description

Password setting device and method in personal video recording device {SYSTEM AND METHOD FOR SETTING PASS WORD ON THE PERSONAL VIDEO RECORDER}

1 is a block diagram showing a password setting device in a personal video recording apparatus according to the present invention,

2 is a flowchart sequentially illustrating a password setting method in a personal video recording apparatus according to the present invention;

3A and 3B are diagrams illustrating PES information in which a password is inserted in a personal recording apparatus according to the present invention.

<Description of the code | symbol about the principal part of drawing>

100, 102: antenna 104: satellite tuner

106: terrestrial broadcast tuner 108, 110: demodulator

112: network connection 114: demux

116: Micom 118: CAM

120: smart card interface 122: controller

124: HDD 126: Audio Decoder

128: Video Decoder 130: PS Mux

132: password insertion unit 134: PS demux

The present invention relates to a personal video recorder (PVR), and particularly, when a descrambled broadcast channel is stored, a password setting device inserted in a password so that no one can see the stored broadcast channel. It's about how.

The current personal video recording device uses a large capacity hard disk device (HDD) instead of a VCR tape to record the current broadcast to a large capacity hard disk (HDD) in real time, while watching the received broadcast program. It is possible to stop or rewind.

However, when a set-top box is installed in the personal video recording apparatus, the scrambled pay channel broadcast among the digital broadcasts such as the received satellite broadcast, terrestrial broadcast, and cable broadcast is descrambled by CI method or CAS method. It can be stored in the hard disk (HDD) or watched.

However, in the personal video recording apparatus according to the prior art, even if the broadcast stored in the hard disk (HDD) by descrambling the scrambled signal of the pay channel broadcast is a broadcast that cannot be watched by children or adolescents, the broadcast is descrambled. Anyone can watch.

In addition, even when a parent lock is applied to an arbitrary broadcast channel in a conventional personal video recording apparatus, anyone who wants to watch the broadcast program when descrambled and displayed on a different set device by transferring the broadcast program stored on the hard disk to another set device is displayed. There is a problem that can be.

In addition, even if a personal video recording device has a parental lock on an arbitrary broadcast channel, the same broadcast channel can be viewed or stored in a broadcast channel of a desired broadcast channel because the ratings of the broadcast programs received according to the broadcast time are different. There is a problem that can not be.

An object of the present invention is to solve the problems of the prior art as described above, by inserting a password in the PES of the descrambled broadcast channel, and converts it to a PS and stored in the hard disk broadcast channel stored by the user with a low rating The present invention provides a device and a method for setting a password in a personal video recording device to freely view.

In order to achieve the above object, the device of the present invention, in the personal video recording device, TS demux for descrambled the transport stream of the received pay channel and convert it to PES, and inserting the password to insert the password entered into the PES PS mux to convert PES with password into PS, hard disk to store PS converted through PS mux, and password to TS demux's PES. It includes Micom, which you can later store on your hard disk.

In order to achieve the above object, the method of the present invention provides a method of controlling a personal video recording apparatus, the method comprising: descrambling a transport stream of a received pay channel and converting the transport stream into a PES; When the password is input, the step of inserting the password entered into the PES, converting the PES inserted the password into a PS, and storing the PS on the hard disk.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

1 is a block diagram showing a password setting device in a personal video recording apparatus according to the present invention.

As shown in FIG. 1, in the personal video recording apparatus according to the present invention, a password setting device includes an antenna (100, 102), satellite and terrestrial broadcast tuners (104, 106), demodulators (108, 110), and a network. Connection 112, TS Demux 114, Microcomputer 116, CAM 118, Smart Card Interface 120, Controller 122, Hard Disk (HDD) 124, Audio Decoder 126, a video decoder 128, a PS mux 130, a password insertion unit 132, a PS demux 134, and the like.

The satellite broadcast tuner 104 and the terrestrial broadcast tuner 106 receive signals transmitted from the respective antennas 100 and 102 to remove noise and convert them into frequency bands that can be processed by a broadcast receiver which is a set-top box. Only an arbitrary broadcast channel is selected and amplified from the signals provided from the.

The demodulators 108 and 110 frequency convert the transponder including the corresponding broadcast channel received from the satellite broadcast tuner 104 and the terrestrial broadcast tuner 106 to baseband, and convert the frequency of the original broadcast channel with QPSK. Demodulate and deliver to TS demux 114.

The network connection unit 112 receives the cable broadcast and transmits the channel frequency of the cable broadcast to the TS demux 114.

The TS demux 114 scrambles a transport stream (TS: Transport Stream) of a corresponding broadcast signal when the transmitted satellite broadcast channel, terrestrial broadcast channel, or cable broadcast channel is a free channel, and parses the video into video or audio. Passed to decoder 128 and audio decoder 126. If the received broadcast channel is a pay channel, the encrypted random number generation value from the EMM packet and the ECM packet, which is a paid reception restriction signal in the transport stream of the corresponding broadcast signal, is transmitted to the CAM 118 or the smart card interface 120, and thus Receives a control word (CW) of random number generation value from the descrambled EMM packet and ECM packet in transport channel of pay channel, demuxes into stream of original broadcast signal, parses it into video, audio, etc. 128 and to the audio decoder 126.

The TS demux 114 of the present invention converts the scrambled or descrambled transport stream into a packetized elementary stream (PES) when the recording key signal is input from the key input unit, and delivers the PS stream to the PS mux 130.

The microcomputer 116 controls the internal components, and tunes (tunes) one of the broadcast channels among satellite broadcast, terrestrial broadcast, and cable broadcast according to a key signal input from a key input unit (not shown). Control to parse the transport stream of the video into video, audio, etc. via the TS demux 114.

When the recording key signal is input from the key input unit (not shown) and the password is input, the microcomputer 116 of the present invention applies the header information of the PES converted by the TS demux 114 by the password insertion unit 132. After inserting the password input from the key input unit is converted into PS (Packetized Stream) through the PS mux 130 and stored in the hard disk (HDD) (124).

In addition, the microcomputer 116 of the present invention converts the PS stored in the hard disk (HDD) 124 into the PES through the PS demux 134 when a random password is input from a key input unit (not shown). The password inserted into the header information of the header is compared with the input password, and if the two numbers are the same, the PES-decoded stream is decoded by the MPEG decompression algorithm through the audio decoder 126 and the video decoder 128. .

The CAM 118 communicates with the microcomputer 116 through the controller 122 when the PCMCIA module, which is a PC card equipped with a CAS function capable of watching pay channel broadcasting, is inserted into the CI slot.

The smart card interface 120 communicates with the microcomputer 116 through the controller 122 when smart cards equipped with a CAS function capable of watching pay channel broadcasting are inserted into a CAS slot.

In the hard disk (HDD) 124, a PES converted by the TS demux 114 is converted into a PS through the PS mux 130 and stored, or a key input unit is provided in the header information of the PES converted by the TS demux 114. After the password entered in is inserted into the PS through PS mux 130 is stored.

The audio decoder 126 decodes the audio streams of the streams delivered from the TS demux 114 and the PS demux 134 with an MPEG decompression algorithm, and then outputs them to a speaker or an audio amplifier of a television.

The video decoder 128 decodes the video streams of the streams delivered from the TS demux 114 and the PS demux 134 with an MPEG decompression algorithm, and then outputs them to a monitor of a television.

The PS mux 130 converts the PES converted by the TS demux 114 to PS and transmits the PES to the hard disk (HDD) 124, or the password insertion unit 132 sends a password to the header information of the PES. The PES is converted into the PS through the inserted PES and transferred to the hard disk (HDD) 124.

The password inserting unit 132 transfers the PES inserted with the password inputted from the key input unit to the PS mux 130 in the header information of the PES converted by the TS demux 114.

The PS demux 134 converts the PS stored in the hard disk (HDD) 124 into a PES, and delivers it to the audio decoder 126 or the video decoder 128. When the password inserted in the header information of the PES is the same as the password input from the key input unit (not shown), the PES is transmitted to the audio decoder 126 or the video decoder 128.

The password setting device in the personal video recording apparatus according to the present invention configured as described above, when the recording key signal of any broadcast channel is input from the key input unit (not shown) and the password is input, the microcomputer 116 is a password insertion unit. After inserting the password inputted from the key input unit into the header information of the PES converted by the TS demux 114 through the 132, the PS demux 114 converts the PS into a PS through the PS mux 130 to the hard disk (HDD) 124. Save it.

In addition, when a key signal for selecting an arbitrary broadcast stream and a random password are input from the broadcast stream stored in the hard disk (HDD) 124 by the key input unit (not shown), the microcomputer 116 may input the hard disk (HDD). PS, which is a selected broadcast stream among the broadcast streams stored in 124, is converted into PES through PS demux 134, and whether the password inserted in the header information of the PES and the input password are the same, and the two numbers are the same. In this case, the PES-decoded stream is decoded by the MPEG decompression algorithm through the audio decoder 126 and the video decoder 128 and output.

2 is a flowchart sequentially illustrating a password setting method in a personal video recording apparatus according to the present invention.

1 and 2, the password setting method of the personal video recording apparatus according to the present invention proceeds as follows.

First, when a key signal for tuning (tuning) an arbitrary broadcast channel is input from a key input unit (not shown), the microcomputer 116 may include a satellite broadcast tuner 104, a terrestrial broadcast tuner 106, and a network connection unit ( In step 112, satellite broadcasts, terrestrial broadcasts, or cable broadcasts are received and demodulated.

The microcomputer 116 demuxes the transport stream TS of the broadcast channel received through the TS demux 114 and converts it into PES (S102).

The microcomputer 116 scrambles the stream of the demuxed broadcast channel if it is a free channel, and generates the CAM 118 or the smart card interface 120 if the stream of the demuxed broadcast channel is a paid channel. Descrambling using the control word (S104).

The microcomputer 116 determines whether a recording key signal of an arbitrary broadcast channel is input from the key input unit, and determines whether a password is input when the recording key signal is input. (S106 to S108).

As a result of the determination in S108, when the password is input, the microcomputer 116 inserts the password input from the key input unit into the header information of the PES converted by the TS demux 114 through the password insertion unit 132 (S110).

The microcomputer 116 muxes the PES inserted with the password through the PS mux 130 into the PS, converts the PS into a PS stream, and stores the same in the hard disk (HDD) 124 (S112 to S114).

If a password is not input, as a result of S108 determination, the microcomputer 116 stores the scrambled or descrambled PES stream in the hard disk (HDD) 124.

On the other hand, if it is determined in S106 that the record key signal is not input, the microcomputer 116 may decode the MPEG-decompressed algorithm through the audio decoder 126 and the video decoder 128 to convert the stream converted into PES through the TS demux 114. After decoding, the data is output (S116).

In addition, although the present invention is not shown in the drawing, a key signal for selecting an arbitrary broadcast stream from a broadcast stream stored in the hard disk (HDD) 124 by a key input unit (not shown) and an arbitrary password are inputted when a password is input. 116 converts the PS, which is the selected broadcast stream from among the broadcast streams stored in the hard disk (HDD) 124, into the PES through the PS demux 134, and checks whether the password inserted in the header information of the PES and the entered password are the same. When the two numbers are the same, the stream converted into PES is decoded by the MPEG decompression algorithm through the audio decoder 126 and the video decoder 128 and output.

3A and 3B are diagrams illustrating PES information into which a password is inserted in a personal recording apparatus according to the present invention.

As shown in FIG. 3A and FIG. 3B, the present invention converts a value set to 00 into a PES scrambling control signal 200 in PES header information into a set password value such as 01, 10, 11, and the like. Save to disk (HDD).

Therefore, in the personal video recording apparatus according to the present invention, the password setting method includes a scrambled or descrambled TS demux when a recording key signal of an arbitrary broadcasting channel is input from a key input unit (not shown) and a password is input. After inserting the password inputted from the key input unit into the PES header information of 114), the PES is converted into the PS through the PS mux 130 and stored in the hard disk (HDD) 124.

Subsequently, when a random broadcast stream is selected from the broadcast streams stored in the hard disk (HDD) 124 and a password is input, the microcomputer 116 selects a broadcast stream selected from the broadcast streams stored in the hard disk (HDD) 124. Is converted into PES through PS Demux 134, and the PES converted stream is converted to PES through the audio decoder 126 and the video decoder 128 if the password inserted in the header information of the PES is the same. Decode and output with the decompression algorithm.

As described above, the present invention inserts the user's password into the PES of the descrambled broadcast channel, converts it into a PS, and stores it on the hard disk so that a user with a low rating can freely view the descrambled pay channel stored on the hard disk. Can not be.

On the other hand, the present invention is not limited to the above-described embodiment, various modifications are possible by those skilled in the art within the spirit and scope of the present invention described in the claims to be described later.

Claims (4)

In a personal video recording device, A TS demux that descrambles the transport stream of the received pay channel and converts it to PES; A password insertion unit for inserting a password inputted into the PES, PS mux to convert the PES inserted the password into PS, A hard disk storing the PS converted through the PS mux, A microcomputer that inserts a password into the PES of the TS demux and converts it into a PS through the PS mux and stores it on the hard disk. Password setting device in the personal video recording device comprising a. The method of claim 1, The password insertion unit And a password is inserted into the PES header information. In the control method of the personal video recording apparatus, Descrambling the transport stream of the received pay channel and converting it to PES; Inserting a password inputted into the PES when a recording key signal is inputted and an arbitrary password is inputted; Converting the PES inserted with the password into a PS; Storing the PS on a hard disk Password setting method in a personal video recording device comprising a. The method of claim 3, Inserting a password in the PES, And a password is inserted into the PES header information.

Images