JPH10224764A - Digital signal receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital signal receiver that conducts simultaneously reception processing for a plurality of networks. SOLUTION: The receiver 1000 has a configuration simultaneously accessible to a plurality of IC cards 1302-1310 that store key data for descramble processing to each network from which a signal is to be received. In a standby state, up-link and program guide data with respect to each network are stored. Even during the reception of a specific network, stored program guide data or the like are displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a digital signal receiving apparatus, and more particularly, to a digital signal receiving apparatus that receives digital satellite broadcasts and outputs corresponding image and sound signals.

[0002]

2. Description of the Related Art Digital satellite broadcasting has been put to practical use, and the number of channels is larger than that of any conventional broadcasting such as terrestrial broadcasting, analog satellite broadcasting, and cable television broadcasting.

[0003] Such multi-channel broadcasting is based on MPEG2, which is an international standard for moving picture compression technology (high-efficiency coding system).
(Moving Picture Experts G
loop phase 2) and a digital transmission system.

[0004] For example, 27 MH mounted on satellite broadcasting
When a single z-transponder (repeater) is used, only one channel of television broadcasting can be provided by the conventional analog system. In digital broadcasting, for example, when the encoding speed of video for one channel is 6 Mbit / sec,
Broadcasting for four channels becomes possible.

[0005] Here, in order to perform pay broadcasting, a scramble process for transmission data and a conditional access system for descrambling the receiver are essential.

FIG. 10 is a diagram for explaining an outline of an example of such an image broadcasting system using satellite broadcasting.

[0007] Various programs from program suppliers are MPE
It is compressed and digitized by the G encoder, and is converted into a packet stream of MPEG2 transport packets in units of 188 bytes. Since these program data are basically paid broadcasts, image and audio packets are encrypted (scrambled) for each packet.
The key for descrambling is transmitted as related information as one of the packets together with the video / audio signal.

However, as will be described later, the transmitted key itself is also encrypted so that the scramble is not illegally decrypted. In the IC card inserted in the machine,
Each is stored secretly. For example, for a broadcast from a particular program provider, which programs in that broadcast can be descrambled?
The configuration is such that it can be selected from the transmitting side based on the contract information of each receiver.

[0009] Normally, a viewer contract is made for each channel, and programs on the contracted channel can always be viewed. However, there is also a contract form called pay-per-view (hereinafter, PPV). That is, for example, this is a contract mode in which only a certain movie program of two hours can be viewed for a fee each time. By operating the remote controller of the receiver, it becomes possible to view the program of the PPV.
V program information is automatically transmitted to the customer management system and charged.

[0010]

FIG. 11 shows a conventional digital signal receiving apparatus 2 for receiving digital satellite broadcasting.
000 is a schematic block diagram showing the configuration of the 000.

Digital signal receiving apparatus 2000 receives a satellite wave received by antenna 100, performs switching of a receiving transponder, demodulation of a received signal, and error correction.
A tuner module 102 that outputs an MPEG2 transport stream; a descramble LSI 104 that receives the transport stream and performs descrambling processing using descrambling key data Ks supplied from an IC card 124; LS
In response to the data transferred from I104, a PSI (program specification information) based on the channel selection operation of the viewer is received,
And a transport stream processing LSI 106 for extracting packets corresponding to necessary video data and audio data from the transport stream and outputting the extracted packets to the corresponding decoding LSIs 108 and 118, respectively.

The digital signal receiving apparatus 2000 further receives an output from the transport stream processing LSI 106 and converts the output into video data before compression processing.
Upon receiving the decoded signals from the PEG2 video decoding LSI 108 and the MPEG2 video decoding LSI 108,
NTS to convert to C signal (composite signal) and output
And a C conversion LSI 110. Here, for example, a terminal for outputting a component signal (a signal obtained by separating a luminance (Y) signal and a chrominance signal (C)) is also provided.

The digital signal receiving apparatus 2000 further receives an output from the transport stream processing LSI 106, converts it into audio data before data compression, and outputs the converted audio data.
And a DA conversion L which receives the decoded signal from the MPEG1 audio decoding LSI 118, DA-converts and outputs it
SI 120.

NTSC conversion LSI 110 and DA conversion L
The signal from the SI 120 is input to a display device (for example, a television receiver) 126, and the corresponding image and sound are output.

The IC card 124 performs charging / communication related control such as descrambling of the scramble key Ks transmitted in an encrypted state, primary storage of the PPV viewing record, and instructing the receiver to make a modem call.

The key data (work key Kw and master key Km) required to decrypt the scramble key Ks is separated by the transport stream processing LSI 106 and
The data is transferred to the card 124.

The control CPU 112 controls all the above processes. In addition, the control CPU 112 controls a program table (EPG: Electric Program Gu).
ide) Data is received and stored in the memory 114, and software processing for realizing various functions, for example, outputting a program guide to the display device 126, processing on an IC card,
The communication processing related to the modem is also executed.

An instruction from the viewer is transmitted to the remote controller 12.
2 is received by the user interface circuit 116 and given to the control CPU 112.

FIG. 12 is a schematic diagram showing a configuration of a system for performing scrambling processing performed on the transmitting side and a conditional access system for performing descrambling on the receiving side.

The scramble processing and the descrambling processing are performed using three types of keys based on a common key cryptosystem.

On the transmission side, a scramble key Ks is used to scramble transmission data such as video. The scramble key Ks is encrypted by using the work key Kw, multiplexed with a satellite wave, and delivered. The work key Kw is also encrypted using the master key Km, multiplexed with satellite waves, and delivered.

On the receiving side, the work key Kw separated from the satellite wave is decrypted by the master key Km in the IC card. The scramble key Ks separated from the satellite wave is decrypted by the decrypted work key Kw and output from the IC card. Using this key Ks,
A descrambling process for a video signal or the like is performed.

FIG. 13 illustrates the operation of digital signal receiving apparatus 2000 in a state in which it receives a broadcast from a single program supplier, that is, in a state in which it receives a broadcast from a single network. It is a flowchart for the.

First, when the main power supply is ON (step S100), the control CPU 112 determines whether or not the initialization of the device, for example, the initialization of the IC card has been completed (step S102). If the initialization has not been completed, an initialization process is performed (step S1).
04).

On the other hand, when the initialization processing is completed, the control CPU 112 performs processing in a standby state, that is, processing such as acquisition of time data, acquisition of data of a reserved program, acquisition of mail, and transfer of viewing recording. (Step S10)
6).

Subsequently, an uplink to the network is determined (step S108). If the uplink is present, the viewing record is transferred (step S110).
The process returns to step S106 (step S12
4).

When there is no uplink instruction, the control CP
U112 determines whether or not the power is ON (step S112).

If the power is not on, the control CPU 112
Determines whether it is the start time of the reserved program (step S114), and if not, the process proceeds to step S114.
The process returns to step 106 (step S124), and if it is the start time, execution processing of the reserved program is performed (step S11)
6).

Subsequently, based on an instruction from the viewer, the control CPU 112 presents the selected program (step 11).
8) Processes such as program guide presentation (step S120) and menu display (S122) are selectively performed.

After the above processing, the control CPU 112
It is determined whether or not there is an instruction to turn off the power (step S122). If there is no instruction, the process returns to step S106. If there is an instruction, an end process is executed (step S124), and the process proceeds to step S106. Return to.

The conventional digital signal receiving apparatus 2000
Since the above-described configuration and operation are performed, there are the following problems.

Here, in order to receive digital broadcasting from a plurality of satellites (networks), it is necessary to have an antenna for receiving radio waves from a plurality of satellites and switch the receiving network. Therefore, it is generally not possible for a single receiver to simultaneously receive images from a plurality of networks. When receiving simultaneously, a plurality of tuners, transport stream processing LSI, MPEG decoding LS
I and the like are required, which is not realistic in view of the cost and the like due to the system configuration.

That is, in order for one receiver to receive a plurality of satellites or a plurality of networks in the same satellite, network switching and IC corresponding to the network are required.
Card switching is required.

When the digital broadcast receiver is configured to selectively receive data only from a single network, a digital broadcast receiver can receive mail, a program guide, an uplink instruction even when the power is off (main power is on) and no video is received. If only information from one network is received in the standby state, the program guide for multiple networks can be displayed at the same time, or images from one network can be displayed. It is impossible to see the program guide display of the other network while watching.

The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to transmit various information from each network in a standby state even when receiving broadcasts from a plurality of networks. An object of the present invention is to provide a digital signal receiving device that can be acquired.

[0036]

According to a first aspect of the present invention, there is provided a digital signal receiving apparatus in a communication system in which a plurality of scrambled program data and attribute data indicating a network to which each program data belongs are simultaneously transmitted as a packet stream. A digital signal receiving device, comprising control means for controlling the operation of the digital signal receiving device, and key data for descrambling different according to the attribute of the program data, and driven externally to output data Information reading means capable of simultaneously accepting a plurality of storage means, and means for descrambling received program data in accordance with attribute data and corresponding key data from the information reading means, wherein the control means Includes memory means for holding and controls information reading means at predetermined time intervals in standby mode Te, acquires predetermined data from each network, stored in the memory unit, in an active state,
The operation of the digital receiving device is controlled according to an external instruction and predetermined data stored in the memory means.

According to a second aspect of the present invention, there is provided a digital signal receiving apparatus,
Each of the plurality of program data is divided into a plurality of packets,
A digital signal receiving apparatus in a communication system in which attribute data indicating a network to which program data belongs is transmitted at the same time as being scrambled and transmitted, and controls the operation of the digital signal receiving apparatus according to a control signal from the outside. Control means, receiving a carrier wave for transmitting a signal including program data and attribute data, receiving and demodulating means, and holding key data for descrambling processing different according to the attribute of the program data; A plurality of storage means for outputting data, an information reading means capable of simultaneously receiving a plurality of data; a means for receiving an output from the demodulation means and descrambling according to attribute data and corresponding key data from the information reading means; Decoding means for extracting an image audio signal from the descrambled signal controlled by The stage includes memory means for holding data, and in a standby state, controls the switching means at predetermined time intervals to acquire predetermined data from each network and store the data in the memory means. The operation of the digital receiving apparatus is controlled in accordance with the instruction and the predetermined data stored in the memory means.

According to a third aspect of the present invention, there is provided a digital signal receiving apparatus.
In the configuration of the digital signal receiving device according to claim 2,
The storage means is an IC card.

According to a fourth aspect of the present invention, there is provided a digital signal receiving apparatus,
The configuration of the digital signal receiving device according to claim 3,
The predetermined data is program guide data, and the control means outputs program guide data corresponding to an arbitrary number of networks among program guide data corresponding to a plurality of networks in response to an external instruction.

[0040]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic block diagram showing a configuration of a digital signal receiving apparatus 1000 according to an embodiment of the present invention, which is compared with FIG.

The conventional digital signal receiving apparatus 20 shown in FIG.
The difference from the configuration of 00 is that an IC card slot 130 capable of receiving a plurality of IC cards at the same time is provided. The other points are basically the same as the configuration of digital signal receiving apparatus 2000, and the same portions are denoted by the same reference characters and description thereof will not be repeated.

That is, the digital signal receiving apparatus 1000
Can receive data from a plurality of IC cards at the same time, and can descramble satellite waves from a plurality of networks.
Descramble LSI 104, transport stream processing LSI 106, MPEG2 video decoding LSI1
08, MPEG1 audio decoding LSI 118 and the like.

FIG. 2 is a conceptual diagram showing the structure of a packet stream of digital satellite broadcasting. The packet stream includes video data, audio data, and additional information to be added to a program in a time division multiplexed manner.

Each of the video and audio data and the additional information is a TS packet (Transport Stream).
m Packet) is divided into small pieces (188 bytes) each having a predetermined size, and they are mixed in a time-division manner, that is, multiplexed and broadcast.

Each TS packet has a PID (Packet)
A number for identifying a TS packet, which is referred to as “ID”, is given to the TS packet.

For the same type of data, the same PID
Is assigned. In FIG. 2, first, the PID is v
1, v2 video data and o1 and o2 audio data exist. Further, video data with a PID of v5 and audio data with an o5 follow.

The additional information data includes, for example, the following three types of data. That is, first, PAT (P
program Association Table)
Data indicating PID information of a PMT, which will be described later, called a PMT (Program Map Table)
Information data of the channel currently being broadcast, called EI
T (Event Information Tabl)
This is program information to be broadcast, which is called e).

A PID is also assigned to PAT, PMT, and EIT, and the PID of PAT is 0000, in hexadecimal notation.
The PID of the EIT is specified in hexadecimal notation as 0012. The PID of the PMT is described in the PAT.

The receiver first receives the PAT, searches for the PMT corresponding to the channel selected by the viewer, and obtains the channel information.

The receiver uses the information of the EIT to display a program table on a TV screen or make a recording reservation.

When a program is reserved for recording, the PMT is continuously observed, and when a designated program code comes, processing for the reserved program such as output or recording of the program is executed. The process ends.

FIG. 3 is a conceptual diagram showing the structure of the PAT. As shown in FIG. 3, the PAT is a table in which the PID of the PMT in which information of each channel currently being broadcast is recorded.

That is, the PAT contains the channel number and P
The PIDs of the MTs are paired and included as many as the number of channels.

The receiver first receives the PAT, searches for a PMT corresponding to the selected channel, and obtains channel information. For example, when the channel n is selected, the PMT whose PID is pn is acquired. The PAT is repeatedly transmitted at a time interval of 0.1 second or less.

FIG. 4 is a conceptual diagram showing the structure of the PMT. As shown in FIG. 4, the PMT is a table in which information of each channel currently being broadcast is recorded.

That is, the PMT contains the channel number, encryption information, copy permission information, the program code currently being broadcast, the PID number of the video data, the PID number of the audio data, and the like in the area specified by the PID. Only included.

The receiver observes the program code reserved for the program, and when the specified program code is received, starts the corresponding processing. The PAT is repeatedly transmitted at a time interval of 0.1 second or less.

FIG. 5 is a conceptual diagram showing the configuration of the EIT. As shown in FIG. 5, EIT is a table in which program information to be broadcast is recorded.

That is, the EIT includes a channel number, a broadcast date, and the like in an area designated by the PID, and subsequently, a program number, a start time, a program name,
The program description information, the program code, and the like are included by the number of programs.

For example, when a program with a program code of c1 is reserved for a program, the receiver observes the PMT, and when a specified program code is received, starts a corresponding process.
The PAT is transmitted repeatedly at a time interval of about one second.

When receiving with one tuner, taking a certain point in time, the first or second IC card 1302 or 13 corresponding to the program provider receiving the program is received.
Any one of 10 will work.

That is, it is possible to respond to reception from a plurality of networks by switching one serial channel as needed.

FIG. 6 shows a digital signal receiving apparatus 1 in a state of receiving broadcasts from two program suppliers, that is, in a state of receiving broadcasts from two networks.
000 is a flow chart for explaining the operation of 000.

First, when the main power supply is ON (step S200), the control CPU 112 determines whether or not the initialization of the device, for example, the initialization of the IC card has been completed (step S202). If the initialization has not been completed, an initialization process is performed (step S2).
04).

On the other hand, if the initialization processing has been completed, the control CPU 112 shifts the state of the apparatus to the standby state (step S206). Subsequently, processing in the standby state, that is, processing such as acquisition of time data with respect to the network A, acquisition of data of a reserved program, acquisition of mail, and viewing / recording transfer is performed (step S208).

Subsequently, an uplink to the network A is determined (step S210). If the uplink is present, the viewing record is transferred, and the process proceeds to step S2.
06 (Step S212).

When there is no uplink to the network A, the control CPU 112 subsequently performs processing in a standby state, that is, acquisition of time data, acquisition of data of a reserved program, acquisition of mail, and transfer of viewing recording to the network B. And the like (step S214).

After the above processing is completed, the control CPU 112
Determines the uplink to the network B (step S216), and transfers the viewing record if the uplink is present, and the process returns to step S206 (step S218).

Subsequently, it is determined whether or not the power is on (step S220). If the power is not on,
The control CPU 112 determines whether it is the start time of the reserved program (step S222), and if not, returns the process to step S206 (step S22).
2) If it is the start time, a process for executing the reserved program is performed (step S224).

Subsequently, based on an instruction from the viewer, the control CPU 112 presents the selected program (step 22).
6) Processes such as program guide presentation (step S228) and menu display (S230) are selectively performed.

After the above processing, the control CPU 112
It is determined whether or not there is an instruction to turn off the power (step S232). If there is no instruction, the process returns to step S206. If there is an instruction, an end process is executed (step S234), and the process proceeds to step S206. To return to.

In the present invention, as described above, it is possible to obtain data from two or more networks in the standby state. In addition, it is not necessary to perform a reset sequence of the IC card every time the network is switched.

In the standby state, data acquisition from a plurality of networks, that is, determination of presence / absence of mail of each network, determination of change of time and reserved program, determination of presence / absence of transfer instruction of viewing history, determination of current broadcast Since the program data (program guide data) is obtained, the following processing can be performed.

FIG. 7 is a diagram showing an example of a display screen of a program guide for a single network. From the top, the channel number currently being received, the broadcast time of the program being broadcast,
Whether the program is paid or free, the name of the program, and the like are displayed, and further below, the program broadcast schedule of each channel broadcast on the network is displayed.

If only such a program guide display for a single network is made, it can be displayed even with a conventional digital signal receiving apparatus.

FIG. 8 is a diagram showing a display example in which program guides for two networks are displayed in parallel.

[0077] Digital signal receiving apparatus 10 of the present embodiment
At 00, since the program guide data of both the network A and the network B are acquired during the standby period, the other program guide other than the program guide of the receiving network can be displayed when the power is turned on.

FIG. 9 is a diagram showing a display example in which the image of the network B being received is output on one half of the screen and the program guide of the other network A is displayed on the other half of the screen.

Since the program guide for the network B other than the network A to be received is acquired during the standby period, such display can be performed.

In addition, by acquiring data or the like for each network during standby, it becomes possible to reserve a program for each network including a network other than the network being tuned, and to acquire mail on each network. Also, it is possible to reduce the number of viewing history transfer failures.

In the above description, the case of receiving data for two networks has been described. However, the present invention is not limited to such a case, and by changing the configuration of the IC card slot 130, more networks can be received. It is also possible to receive.

[0082]

As described above, according to the present invention,
When receiving scrambled program data from multiple networks, the receiving device acquires and retains additional information from each network in the standby state, so it can receive mail from multiple networks,
Uplink is possible. Further, a program guide other than the currently receiving network is displayed simultaneously with the program guide for the currently receiving network, or the other program guide is displayed while displaying the video of the program of the currently receiving network. Becomes possible. Also, program reservation for a plurality of networks becomes possible.

[Brief description of the drawings]

FIG. 1 is a digital signal receiving apparatus 1 according to an embodiment of the present invention.
000 is a schematic block diagram showing the configuration of the 000.

FIG. 2 is a schematic diagram illustrating a configuration of a packet stream of digital satellite broadcasting.

FIG. 3 is a schematic diagram showing a configuration of a PAT.

FIG. 4 is a schematic diagram showing a configuration of a PMT.

FIG. 5 is a schematic diagram showing a configuration of an EIT.

FIG. 6 is a flowchart showing an operation of the digital signal receiving apparatus 1000.

FIG. 7 is a diagram showing a display example of a program guide.

FIG. 8 is a diagram illustrating a display example in which program guides of two networks are simultaneously displayed.

FIG. 9 is a schematic diagram showing a display example in which an image being received and a program guide of a non-receiving network are simultaneously displayed.

FIG. 10 is a conceptual diagram showing a configuration of a digital satellite broadcasting system.

FIG. 11 is a schematic block diagram illustrating a configuration of a conventional digital signal receiving device 2000.

FIG. 12 is a schematic diagram showing a configuration of a system for performing scrambling processing and a system for performing descrambling.

FIG. 13 is a flowchart illustrating the operation of the conventional digital signal receiving apparatus 2000.

[Explanation of symbols]

 Reference Signs List 100 antenna 102 tuner module 104 descramble LSI 106 transport stream processing LSI 108 MPEG2 video decoding LSI 110 NTSC conversion LSI 112 control CPU 114 memory 116 user interface circuit 118 MPEG1 audio decoding LSI 120 DA conversion LSI 122 remote controller 124 IC card 126 display device 1000, 2000 digital signal receiving device

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Showa Kita 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Nobuhiro Hara 2-chome, Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. (72) Inventor Toyomi Yamagata 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd.

Claims (4)

[Claims] 1. A digital signal receiving apparatus in a communication system in which a plurality of program data subjected to scramble processing and attribute data indicating a network to which each of the program data belongs are simultaneously transmitted as a packet stream. Control means for controlling operation, information reading means for holding a plurality of key data for descrambling processing different according to the attribute of the program data, and a plurality of storage means, which are externally driven and output data, can simultaneously receive a plurality of storage means Means for descrambling the received program data according to the attribute data and the corresponding key data from the information reading means, wherein the control means includes memory means for holding data, In the state, the information reading means is controlled at predetermined time intervals, and each of the nets is controlled. Acquiring predetermined data from a work, storing the data in the memory means, and in an active state, performing operation control of the digital receiving apparatus in accordance with an external instruction and predetermined data stored in the memory means. Signal receiver. 2. A digital signal receiving apparatus in a communication system in which each of a plurality of program data is divided into a plurality of packets, scrambled and transmitted, and attribute data indicating a network to which the program data belongs is simultaneously transmitted. Control means for controlling the operation of the digital signal receiving apparatus according to an external control signal; means for receiving and demodulating a carrier transmitting a signal including the program data and the attribute data; and Holding key data for descrambling processing different according to the attribute of the storage means, which is driven from the outside and outputs data, a plurality of information reading means capable of simultaneously receiving, receiving the output from the demodulation means, Means for descrambling according to the attribute data and the corresponding key data from the information reading means, Decoding means controlled by the control means for extracting an image sound signal from the descrambled signal, the control means including a memory means for holding data, and in the standby state, the switching at predetermined time intervals Means for obtaining predetermined data from each of said networks, storing said data in said memory means, and in an active state, receiving said digital data in response to an external instruction and predetermined data stored in said memory means. A digital signal receiving device that controls the operation of the device. 3. The digital signal receiving device according to claim 2, wherein said storage means is an IC card. 4. The program control apparatus according to claim 1, wherein the predetermined data is program guide data, and the control means is responsive to an external instruction to correspond to an arbitrary number of networks among the program guide data corresponding to the plurality of networks. 4. The digital signal receiving apparatus according to claim 3, which outputs program guide data to be transmitted.