JPH0823314A - Data broadcast system - Google Patents

Abstract

PURPOSE:To display a variety of designs on a screen. CONSTITUTION:An object including at least design programs being programs controlling design of a screen is sent via a satellite 4 together with data of newspaper, magazines and books and a data receiver 6 receives the data and the object. The received data are recorded on a magneto-optical disk (MO) 8 in the data receiver 6, the data are read out therefrom as required and displayed on a monitor 7. The data are displayed on the monitor 7 according to the received design program.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example, newspapers, books,
The present invention relates to a data broadcasting system for transmitting (broadcasting) data of a publication such as a magazine to a data receiving device arranged in each home, recording the data in the data receiving device, and viewing the recorded data.

[0002]

2. Description of the Related Art Recently, for example, as a data broadcasting system for electronically distributing newspaper data (newspaper data), newspaper data is inserted into a satellite data channel,
It is considered that this is transmitted via a satellite. In this case, a data receiving device at a home (contractor side) that has contracted to distribute newspaper data receives a signal from a satellite and takes out the newspaper data inserted in the data channel. And this newspaper data is
For example, it is recorded in a recording medium such as a magnetic disk or a magneto-optical disk, and when the contractor desires, the desired one is searched from there. The retrieved data is displayed on a display or printed out,
This allows the contractor to view the newspaper.

[0003]

By the way, in the above-mentioned system, the display of the data receiving device has a GUI (Gr) installed when the device is manufactured.
Screen display is made by aphical User Interface).

Therefore, only the screen display having a uniform design can be displayed.

Further, although there are various types of displays having different sizes, resolutions, gradation numbers, color numbers, etc., the above-described data receiving apparatus is compatible with such various types of displays. Was not. That is, in the data receiving device, the display is designed to be performed only in the design suitable for the predetermined display. Therefore, if a display other than the predetermined display is used, the display will not be comfortable. Was sometimes done.

In addition, in the data broadcasting system as described above, not only newspaper data but also multimedia data combining still images, graphics, moving images, and voice can be transmitted using this as a core. When displaying such multimedia data, it is preferable that the screen design can be flexibly changed according to the contents.

In addition, for example, when displaying a newspaper, there is a demand for changing the background of the display, the design of the icon, etc. depending on the type (for each newspaper company that issues the newspaper) or the day. Has occurred.

The present invention has been made in view of such a situation, and is intended to enable screen display of various designs.

[0009]

A data broadcasting system of the present invention transmits data via a transmission line, receives the data transmitted via the transmission line with a data receiving device, and receives the data from the data receiving device. In the data broadcasting system for recording the data received by the device, reading the recorded data, and displaying the data on the screen, an object including at least a design program that is a program for controlling the screen design is transmitted to display the screen on the design program It is characterized by performing according to.

In this data broadcasting system, the design program can be an intermediate code that does not depend on hardware. Moreover, the design program of the intermediate code received by the data receiving device can be temporarily recorded and then translated into machine code. In addition, data and objects can be transmitted over satellite lines or the CATV network. In addition, the data can be data of a publication.

[0011]

In the data transmission device having the above structure, the object including at least the design program which is the program for controlling the screen design is
The data is transmitted through the transmission line and received by the data receiving device. The data receiving device records the received data,
The recorded data is read out as needed and displayed on the screen. Then, the display of the screen is performed according to the design program. Therefore, it is possible to display screens with various designs.

[0012]

1 shows an example of the configuration of a data broadcasting system to which the present invention is applied. According to this data broadcasting system, for example, multimedia data centered around data of newspapers, books, magazines and other publications is broadcast, and the receiving side receives this, records it on a recording medium, and when desired. It is designed so that the data can be read and viewed from there.

A newspaper company as an information provider has a large-scale computer 1. A paper space database is stored in the large-scale computer 1. This paper surface database includes articles and photographs for printing on newspapers, drawing information, and layout information. The data in this database are all digitized and are transmitted to the editing device 2 and edited there as required.

That is, the data in the database is edited, for example, on each sheet of paper in a format that can be easily searched by the receiving (recipient) side. For example, this editing creates a screen for search in which the layout is unchanged and only the headline is visible and the paper surface is reduced as it is. Further, the search screen (heading) is associated with the article data describing the details so that the article corresponding to the heading can be displayed from this heading.

Further, in the editing device 2, for example, additional text data, image data, and voice data which are not stored in the large-scale computer 1 (for example, news program images and voices corresponding to newspaper articles, etc.). ) Etc. are input as needed. In the editing device 2, these pieces of information (text data, image data, voice data) (also digitized like the data in the above-mentioned database) are edited in a format that can be easily searched by the receiving side ( In this case, as described above, in addition to editing the layout when the information (text data, image data, voice data) is displayed on the screen, the relation between the information and the newspaper article corresponding to the information is also performed. ).

The image data and audio data are compressed as needed. Further, it is possible to appropriately insert advertisement data provided by the advertisement providing company into the newspaper data. In this case, the advertisement data is properly displayed on the receiving side during the search of newspaper data.

As described above, multimedia newspaper data whose core is newspaper data, which is data edited in a form that can be easily searched by the receiving side and which is a combination of text data, image data, and voice data, is for example terrestrial. The data is transmitted to the service management company 3 via the data line.

Further, the service operating company 3 is provided with data such as magazines and books provided by publishers, which are other information providers, and programs provided by television stations (composed of video signals and audio signals). ) Etc. are also supplied. Note that the data of a magazine or book provided by a publisher is multimedia data (hereinafter, appropriately referred to as a multimedia magazine) that is a combination of text data, image data, and audio data, like the data provided by a newspaper company, for example. /
Book data)).

The data transmitted to the service management company 3 is transmitted from there to a satellite (broadcast satellite (BS) or communication satellite (CS)) 4, and from the satellite 4 to a receiving side (for example, a receiver in each home). (Subscriber) etc.). That is, the information (data) provided by the information provider
Is transmitted to the receiver side via the satellite line.

The service operating company 3 has a transmitting device as shown in FIG. 2, for example. The multimedia newspaper data from a newspaper company and the multimedia magazine / book data from a publisher (hereinafter, both are appropriately referred to as multimedia data) are input to a multiplexing circuit 26 that constitutes a transmitter. . Further, the multiplexing circuit 26 is supplied with the output of the design object generation processing circuit 27 constituted by a computer including, for example, CPU, ROM, RAM and the like.

Design object generation processing circuit 27
Generates a design program that is a program for controlling the screen design of the monitor 7 (FIG. 1) on the receiving side, and further adds the design program (source program) to
It is converted into intermediate code that does not depend on hardware, that is, intermediate code that is interpreted and executed by a so-called virtual machine. Then, the object (hereinafter, appropriately referred to as a design object) of the intermediate code (intermediate code file) of this design program is output to the related information encryption circuit 11. The design object includes control data used in the design program, if necessary. This control data is also generated by the design object generation processing circuit 27.

Therefore, in this case, since the design program is transmitted as an intermediate code as will be described later, it is possible to reduce the amount of transmission data as compared with the case where the design program is transmitted as it is.

The multiplexing circuit 26 multiplexes the multimedia data input thereto and the design object, and the multiplexed data obtained as a result is supplied to the encoder 25 constituting the transmitter. In the service management company 3, before the multimedia magazine / book data is input to the multiplexing circuit 26, if necessary,
It is edited so that it can be easily searched by the receiving side.

In the encoder 25, in addition to the multiplexed data,
For example, common information including a data identifier (for identifying multimedia data), a work key, and data such as a scramble key are input.

Of these, the multiplexed data is supplied to the data scrambler 14, and PN (pseudonois) is supplied.
e) Independent data channel multiplexing circuit 1 scrambled corresponding to the pseudo random sequence output from the generator 13.
2 is output. The pseudo-random sequence generated by the PN generator 13 is set corresponding to the scramble key input thereto. The scramble key can be changed regularly, such as every day, or irregularly.

The scramble key is supplied to the related information encryption circuit 11 as well as the PN generator 13. In addition to the scramble key, the encryption circuit 11 is supplied with common information and a work key. In the encryption circuit 11, the scramble key and the common information are encrypted using the work key. The encrypted data is supplied to the independent data channel multiplexing circuit 12 as related information.

The independent data channel multiplexing circuit 12 is
The scrambled multiplexed data supplied from the data scrambler 14 and the related information supplied from the encryption circuit 11 are multiplexed and output to the digital channel signal multiplexing circuit 15.

The above configuration constitutes an encoder 25 for generating data in an independent data channel, which will be described later with reference to FIG.

The digital channel signal multiplexing circuit 15 also receives an audio signal transmitted as a digital channel signal (at least a part of which is an audio signal of a program provided by the above-mentioned television station). . The digital channel signal multiplexing circuit 15 multiplexes the input audio signal (digital audio signal) and the data supplied from the encoder 25, and four-phase DPSK
It is supplied to the modulator 16.

The 4-phase DPSK modulator 16 4-phase DPSK-modulates the input data and outputs it to the video signal / digital channel signal multiplexing circuit 17. This video signal /
The digital channel signal multiplexing circuit 17 also includes
A video signal of a program provided by a television station is input.
The audio signal input to the digital channel signal multiplexing circuit 15 is a digital signal, whereas the video signal input to the video signal / digital channel signal multiplexing circuit 17 is an analog signal.

Note that, in the future, this video signal will be a digital signal instead of an analog signal, and will be provided by an information provider (a newspaper company, a publishing company, and a television station in FIG. 1).
It is possible to handle all the data transmitted from the device as multimedia data.

The video signal is scrambled, and then the video signal / digital channel signal multiplexing circuit 1
It is possible to input to 7. in this case,
The scramble key used for scrambling the video signal is encrypted by, for example, the related information encryption circuit 11 and included in the related information.

The video signal / digital channel signal multiplexing circuit 17 frequency-multiplexes the input video signal and the signal supplied from the 4-phase DPSK modulator 16, and FM
Output to the modulator 18. The FM modulator 18 FM-modulates a predetermined carrier with the input signal and outputs it to the up converter 19. The up-converter 19 frequency-converts the input FM signal into a signal in a frequency band on the order of gigahertz (for example, Ku band or Ka band). The FM signal output from the up converter 19 is
After the power is amplified by the power amplifier 20, the power is supplied to the transmitting antenna 21 and is then transmitted to the satellite 4 (FIG. 1).

Here, FIG. 3 shows the format (A mode format) of digital channel data which has been subjected to 4-phase DPSK modulation. As shown in the figure, one frame of data is composed of a total of 2048 bits of horizontal 64 bits and vertical 32 bits. A frame synchronization signal, a control signal, and a range bit signal are arranged (recorded) in the first range of 2 bits × 32 bits. 1 ms data for 1 frame
Transmission rate is 2.048Mb
ps.

The frame synchronization signal is a signal for synchronizing each frame. The control signal indicates whether the transmission mode is the A mode or the B mode, and the television audio signal (audio signal of the program provided from the television station) (located in the audio 1 and 2 in FIG. 3). It indicates whether it is a stereo signal, a monaural 1-channel signal, a monaural 2-channel signal, or the like.

The voices 1 to 4 to be described below are the most significant 1 of the significant digits of the voice data quantized with 14 bits.
0 bit is selected and arranged. The range bit signal is adapted to represent the range of the selected audio data.

As shown in FIG. 3, in the first 2 × 32 bit range, the next 10 × 32 bit range, and the subsequent 10 × 32 range, the voice data of voice 1 to voice 4 are respectively provided. Are recorded (arranged) (however, data other than voice may be arranged in the voices 3 and 4). Next to the voice 4 data, 15x
The data of the independent data channel is arranged in the 32-bit range, and the horizontal error correction code is arranged in the last 7 × 32-bit range.

Here, the data of the independent data channel shown in FIG. 3 is transmitted in a predetermined packet unit. For example, one packet is composed of 288 bits, the first 16 bits are used as a header, the actual data is arranged in the following 190 bits, and the error correction code of the packet is arranged in the last 82 bits. The header includes at least a service identification code and its error correction code (check bit). The service identification code identifies, for example, whether the data arranged in the packet is related information or multiplexed data. It includes a code for doing.

To the independent data channel, the related information output by the related information encryption circuit 11 shown in FIG. 2 and the multiplexed data output by the data scrambler 14 are allocated in packet units, and the packet allocation is performed. A service identification code is set in correspondence with the obtained data (whether the data is related information or multiplexed data).

The above-mentioned data is transmitted from the service operating company 3 in FIG. 1 to the satellite 4, and is further transmitted from the satellite 4 to, for example, the receiver (contractor) in each home. In each home (reception side), the signal transmitted from the satellite 4 is received by the outdoor device (parabolic antenna) 5 and converted into a predetermined intermediate frequency signal (IF signal). This IF signal is input to the data receiving device 6.
The IF signal input to the data receiving device 6 is demodulated therein and recorded on a recording medium (other than, for example, a magnetic disk (hard disk)) such as a magneto-optical disk (hereinafter referred to as MO) 8 or the like.

After recording the data in the MO 8, the user (receiver) can retrieve the necessary data from the user (receiver) and output it to the monitor 7 for display (or a speaker not shown) when desired. Can be output from). Further, the MO 8 can be attached to, for example, a portable terminal, a desktop terminal, or the like, and desired data can be searched and displayed from there.

Next, FIG. 4 shows a configuration example of the data receiving device 6. Each block constituting the data receiving device 6 is adapted to exchange data (including control commands and the like) via a bus.
Each block is controlled by a processing circuit 32 including U, ROM, and RAM. The data receiving device 6 can be controlled by operating the remote controller 9. That is, when the remote controller 9 is operated, a signal corresponding to the operation is sent to the processing circuit 32 via the input device 33.
In the processing circuit 32, the processing corresponding to the signal from the remote controller 9 is performed.

In this data receiving device 6, the IF signal from the outdoor device 5 is supplied to the data receiving circuit 31. In the data receiving circuit 31, the input IF signal is demodulated. Further, the data receiving circuit 31 includes the processing circuit 3
Under the control of 2, the multimedia data contracted by the receiver (for example, newspaper data of a predetermined newspaper company and accompanying text data, image data, and audio data, data of a predetermined magazine or book, and accompanying data thereof) Text data, image data, voice data, etc.) are decoded and output to the data recording medium control circuit 34.
The data recording medium control circuit 34 records the data from the data receiving circuit 31 in MO8.

After that, when the remote controller 9 is operated and an operation signal corresponding to the operation is received by the input device 33,
The input device 33 transfers the operation signal to the processing circuit 32. When the processing circuit 32 receives the predetermined operation signal, the processing circuit 32 causes the data recording medium control circuit 34 to reproduce the data recorded in the MO 8 and supplies it to the display interface 35. The display interface 35 converts the input data into a video signal and outputs the video signal to the monitor 7 for display (when the data reproduced from the MO 8 is audio data, the data is output from a speaker not shown). Be done). This allows the contractor to
You can view subscribed newspapers, magazines, books, and accompanying text, images, and audio.

The processing circuit 32 displays on the monitor 7 the data (multimedia newspaper data, multimedia magazine / book data) read out from the data recorded on the MO 8 according to the design program described above. Let That is, on the monitor 7, data is displayed with a screen design according to the design program.

In the data receiving circuit 31, a security module sent from the service operating company 3 (for example, mailed by concluding a receiving contract), for example, the IC card 10 via the security module interface 33. The related information is decrypted by using the data supplied as described below.

Here, the IC card 10 is shown in FIG.
, The work key register 10a, the contract content register 10b, and the data receiving device ID register 10
The work key register 10a includes a work key for performing security management, and the contract content register 10b includes a data content identifier of multimedia data with which the receiver has received a contract, for example. However, in the data receiving device ID register 10c, the unique receiving device IDs which are given in advance to the data receiving device 6 are stored. The security module interface 33 reads out the information stored in the IC card 10, and outputs the work key and the contract content obtained as a result to the data receiving circuit 31 and the receiving device ID to the processing circuit 32, respectively. Has been done.

FIG. 5 shows a more detailed configuration example of the data receiving circuit 31. The IF signal input from the outdoor device 5 is input to the FM demodulator 71. FM demodulator 71
Demodulates the IF signal into a baseband signal and outputs it to the video signal / digital channel signal separation circuit 72.
The video signal / digital channel signal separation circuit 72 is
The video signal and the digital channel signal are separated from the input signal. The video signal is supplied to a decoder (not shown). The decoder descrambles the video signal using the scramble key supplied from the related information decoding circuit 82 as will be described later, when the reception contract of the supplied video signal is concluded. The descrambled video signal is, for example, according to the operation of the remote controller 9,
It is output to and displayed on the monitor 7 via the display interface 35 (FIG. 4).

On the other hand, the digital channel signal separated by the video signal / digital channel signal separation circuit 72 is input to the 4-phase DPSK demodulator 73 and demodulated. The signal output from the 4-phase DPSK demodulator 73 is input to the digital channel signal separation circuit 74, where it is converted into a voice signal (a signal arranged in the voice 1 to 4 shown in FIG. 3) and a signal of an independent data channel. To be separated. When the audio signal corresponds to the above-mentioned video signal, the audio signal is supplied to the speaker in accordance with, for example, the operation of the remote controller 9, and is output as audio from the speaker.

Further, the digital channel signal separation circuit 74 outputs the separated independent data channel signal to the multimedia data / related information separation circuit 81. The multimedia data / related information separation circuit 81 separates multiplexed data (multiplexed of multimedia data and design objects) and related information from the input signal, and the multiplexed data is sent to the data descrambler 87.
To the related information decoding circuit 82.
Output to. This is done by referring to the service identification code described above.

The decryption circuit 82 uses the work key supplied from the IC card 10 via the security module interface 33 (FIG. 4) to decrypt the scramble key and common information input as related information. Then, the scramble key is output to the on / off switching circuit 85, and the common information is output to the download availability determination circuit 83.

The download permission / inhibition decision circuit 83 uses the data identifier included in the input common information as the IC card 1
The contract content supplied from 0 through the security module interface 33 is compared. As described above, the contract content includes the data identifier of the multimedia data that has been contracted in advance, and the download permission / inhibition decision circuit 83 determines that the two data identifiers input thereto match and When the matched data identifier is stored in the download request setting circuit 84, a control signal for switching the on / off switching circuit 85 to the on state is output. As a result, the scramble key output from the decoding circuit 82 is supplied to the PN generator 86 via the ON / OFF switching circuit 85.

Here, in the download request setting circuit 84, for example, by operating the remote controller 9, the data identifier of the multimedia data desired to be downloaded among the multimedia data contracted by the receiver (contractor) is registered in advance. ing. Therefore, in the download permission / inhibition determination circuit 83, the control signal is output when the multiplexed data including the contracted multimedia data including the one desired to be downloaded is received.

The PN generator 86 generates a pseudo random sequence corresponding to the input scramble key. The data descrambler 87 descrambles the multiplexed data (multimedia data and design object) supplied from the multimedia data / related information separation circuit 81 by using the pseudo random sequence supplied from the PN generator 86. And output. In this case,
In the processing circuit 32, the data receiving device I of the IC card 10
The receiving device ID stored in the D register 10c is compared with the receiving device ID of this data receiving device 6 stored in the memory (not shown). If they do not match, the descrambler 87 descrambles the data. Control is performed so that processing is not performed. That is, illegal I
When the C card is used, descramble cannot be performed.

The multiplexed data output from the data descrambler 87 is supplied to the processing circuit 32. In the processing circuit 32, the multiplexed data is multimedia data,
It is separated into a design object and MO8 via the data recording medium control circuit 34 (FIG. 4).
Will be supplied to and recorded.

When the decoding result of the input related information includes the scramble key used for scrambling the video signal from the television station, the related information decoding circuit 82 outputs it to the decoder. As a result, the decoder uses the scramble key as described above for the video signal / digital channel signal separation circuit 72.
The video signal output from is descrambled.

After the multimedia data and the design object are recorded in MO8, the processing circuit 32 outputs M
The design object recorded in O8, that is, the design program of the intermediate code is appropriately read and converted (translated) into a machine code that can be executed by itself (a CPU included in the processing circuit 32). The design program converted into an executable file is supplied to the MO8 again and recorded therein.

The conversion of the design program into the machine code is carried out, for example, by utilizing the idle time of the CPU incorporated in the processing circuit 32. Further, in the above-mentioned case, the intermediate code design program is once recorded in MO8 and then converted into the machine code. However, in addition to this, for example, in the processing circuit 32, the intermediate code design object is stored in MO8. It is also possible to directly convert the design object output from the data descrambler 87 into a machine code without recording it. However, in this case, it may be necessary for the processing circuit 32 to perform the conversion processing into the machine code when the processing with a large load is being performed there. Must be of high performance.

After that, when the remote controller 9 is operated to display the multimedia data recorded in the MO 8, the processing circuit 32 causes the monitor 7 to display the multimedia data according to the design program as described above. Display it.

That is, in this case, the processing circuit 32 has the GU preinstalled in its built-in ROM.
In the process of processing I, as one of the programs for processing the GUI, the design program of the machine code recorded in MO8 is loaded and executed (started).

Depending on the design program, the following screen display control is performed, for example. That is, the monitor 7
A bitmap image of a design such as a background and an icon is created in a form most suitable for the monitor 7 based on specifications such as screen size, resolution, number of gradations, and number of colors. The specifications of the monitor 7 are, for example, a memory (not shown) built in the monitor 7.
And is read from the processing circuit 32 by the processing circuit 32.

In this case, if a monitor other than a predetermined one, such as a computer display or a television receiver, is used as the monitor 7, a suitable display can be performed.

Further, a bitmap image corresponding to the multimedia data read from MO8 and displayed is created. That is, for example, when displaying newspaper data,
According to the design program, a bitmap image of newspaper data read from the MO8 is created and displayed based on the screen design specifications set in advance for each newspaper (newspaper type). In this case, the type of newspaper is recognized by referring to the data identifier output from the decoding circuit 82 during descrambling, for example.

Further, the design program allows the user (receiver) to operate the remote controller 9 to set parameters (design parameters) (for example, characters or characters, etc.) that determine the screen design when the multimedia data is displayed on the monitor 7. Icon, background display color, display size of characters and icons, typeface of characters, type of layout and background (for example, multiple types of layouts and backgrounds are prepared in advance. ) And other parameters that determine) can be entered. Then, according to the design program, when design parameters are input by operating the remote controller 9, a bitmap image of the screen design is created according to the design parameters. The design parameters can be included in the design object and transmitted from the service operating company 3 or the information provider side as the control data described above.

As described above, since the data receiving device 6 receives the design program and controls the screen display according to the program, it is possible to display the screen with various designs.

Further, the design program is described by an intermediate code which does not depend on hardware, that is, an intermediate code which is interpreted and executed by a so-called virtual machine. Therefore, the processing circuit 32 should be realized by software on various microcomputers. As a result, the device can be configured without using dedicated hardware.

The case where the present invention is applied to the data broadcasting system for transmitting the data of publications such as newspapers, magazines and books has been described above, but the present invention is applied to the data broadcasting system for transmitting other data. It is possible.

In this embodiment, the data is transmitted through the satellite line. However, as the transmission line for transmitting the data, other than this, wireless lines other than the satellite line, PSTN, ISDN are used. , CATV cables, dedicated lines, other data lines, etc. can be used.

Further, in the present embodiment, the design object is transmitted (transmitted) through the same transmission path as the multimedia data (satellite line in the present embodiment), but the design object and the multimedia data are transmitted. Can be transmitted (transmitted) through different transmission paths.

That is, for example, multimedia data is a large-capacity satellite line, and design objects are, for example, I
Each can be transmitted (transmitted) by a telephone line (public telephone network) such as SDN or PSTN.

Further, in the present embodiment, the intermediate code of the design program is transmitted. However, in addition to this, for example, the source program and the machine code converted (translated) (compiled) are transmitted. It is also possible to do so.

Further, in the present embodiment, the design object generation processing circuit 27 (FIG. 2) is provided in the service operating company 3, but in addition to this, the design object generation processing circuit 27 is provided on the information provider side. By doing so, it is possible to provide the design object, including its control data, if necessary, from the information provider.

[0073]

As described above, according to the present invention, it is possible to perform screen display with various designs.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration example of a data broadcasting system to which the present invention is applied.

FIG. 2 is a block diagram showing a configuration example of a transmission device included in the service operating company 3 of FIG.

FIG. 3 is a diagram illustrating a format of digital channel data.

4 is a block diagram showing a detailed configuration of a data receiving device 6 in FIG.

5 is a block diagram showing a detailed configuration of a data receiving circuit 31 of FIG.

[Explanation of symbols]

 1 Large-scale computer 2 Editing device 3 Service operating company 4 Satellite 5 Outdoor device 6 Data receiving device 7 Monitor 8 Magneto-optical disk (MO) 9 Remote controller 10 IC card 10a Work key register 10b Contract content register 10c Data receiving device ID register 11 Related information Encryption circuit 12 Independent data channel multiplexing circuit 13 PN generator 14 Data scrambler 15 Digital channel signal multiplexing circuit 16 4-phase DPSK modulator 17 Video signal / digital channel signal multiplexing circuit 18 FM modulator 19 Up converter 20 Power Amplifier 21 Transmitting antenna 25 Encoder 26 Multiplexing circuit 27 Design object generation processing circuit 31 Data receiving circuit 32 Processing circuit 33 Input device 34 Data recording medium control circuit 35 Display Interface 36 Security Module Interface 71 FM Demodulator 72 Video Signal / Digital Channel Signal Separation Circuit 73 4-Phase DPSK Demodulator 74 Digital Channel Signal Separation Circuit 81 Multimedia Data / Related Information Separation Circuit 82 Related Information Decoding Circuit 83 Downloadability Judgment Circuit 84 Download request setting circuit 85 ON / OFF switching circuit 86 PN generator 87 Data descrambler

Claims (5)

[Claims] 1. Data is transmitted through a transmission path, data transmitted through the transmission path is received by a data receiving device, and data received by the data receiving device is recorded and recorded. In a data broadcasting system for reading data and displaying it on a screen, an object including at least a design program that is a program for controlling the design of the screen is transmitted, and the screen is displayed according to the design program. Data broadcasting system. 2. The data broadcasting system according to claim 1, wherein the design program is an intermediate code that does not depend on hardware. 3. The data broadcasting system according to claim 2, wherein the design program of the intermediate code received by the data receiving device is temporarily recorded and then translated into a machine code. 4. The data broadcasting system according to claim 1, wherein the data and the object are transmitted via a satellite line or a CATV network. 5. The data broadcasting system according to claim 1, wherein the data is data of a publication.