JP3502260B2 - Television broadcast signal receiving apparatus and television broadcast signal receiving method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast communication system such as television broadcast and radio broadcast, and more particularly to a broadcast system characterized by transmitting and receiving control information for viewing broadcast contents.

[0002]

2. Description of the Related Art At present, various broadcasting systems are used for television broadcasting.

For example, in Japan, the NTSC system is generally used. In other countries, the NTSC system and the PA are used.
The L method and the SECAM method are used.

In addition, ISDV (Iiteg) for performing time division multiplexing transmission after digitizing a video signal and compression-encoding it
rated Services Digital Br
Oadcasting method is under study.

Further, in general, one receiver can receive a plurality of broadcasts allocated to different channels as long as they are of the same broadcast format. Then, the viewer can select from among the multiple channels that the receiver can receive,
One channel is selected according to the desired information and the image of that channel is viewed.

[0006]

However, in such a broadcasting system, a broadcasting standard for broadcasting is uniquely determined. Therefore, it is not possible to flexibly select any compression method or multiplexing method according to the video to be broadcast,
Services that can be provided to viewers are limited.

Further, as described above, in the conventional broadcasting system, the viewer can select one channel from a plurality of channels in accordance with desired information. However, within one channel, the viewer does not have the right to select the video, and only the passive viewing of the video broadcast by the selected channel is allowed. However, the required information differs for each viewer. Therefore, it is desirable to be able to flexibly select an image within one channel in accordance with the requested information.

Therefore, the present invention provides a television broadcasting system in which flexibility is provided in the compression system, the multiplexing system, the viewer's video selectivity, etc. in order to provide various services to the viewer. The purpose is to provide.

[0009]

[Means for Solving the Problems] To achieve the above object,
The present invention is associated with multiple programs and each of these programs.
Digital broadcast including program channels with controlled control information
A receiver that receives the transmission number and accepts user instructions
Operation input section and digital broadcast signal received by the receiving section
From the user via the operation input section
And a processing unit for outputting the digitized program to the display unit.
The control information relates to the coding of the program corresponding to the control information.
Information, and each processing unit has a different code.
It has a plurality of decoding means corresponding to the encoding method,
Accept a selection from the user out of a number of decryption means
The encoding included in the control information corresponding to the
Selected by the user by using the decryption method according to the information
The program that accepts the selection is decoded and output to the display unit.
Provided is a television broadcast signal receiving device characterized in that
To do.

[0010]

EXAMPLE An example of the present invention will be described below.

First, the configuration of the television broadcasting system according to this embodiment is shown in FIG.

As shown in the figure, the television broadcasting system according to this embodiment has a transmitter 101 and a receiver 102.
It is composed of

The transmitter 101 transmits the broadcast information, and the receiver 102 receives the broadcast information and displays the broadcast contents.
The broadcasting of broadcasting information from the transmitting device 101 may be wireless broadcasting or wire broadcasting. That is, in addition to general television broadcasting using radio, broadcasting by so-called cable television or the like may be used.

The transmitting device 101 includes a plurality of input devices 10.
3, a signal synthesis coding unit 104, a transmission unit 105, a program storage unit 106, and a transmission control unit 107.

The receiving device 102 includes a receiving unit 108, a signal separating unit 109, a decoding unit 110, a display unit 111, a received signal storage unit 112, a user operation input unit 113, and a reception control unit 1.
It is composed of 14.

The operation of each part of the transmitting device 101 is as follows.

Each input device 103 takes in broadcast content information such as a text, an image, a moving image and a sound to be broadcast, into the transmitting device 101.

The program storage unit 106 stores control information for each broadcast channel. The control information is information for controlling the broadcast content of the corresponding broadcast channel, as will be described later.

The signal synthesizing coding unit 104 codes each broadcast content information report received by the plurality of input devices 103. Also, each control information in the program storage unit 106 is received and encoded. At this time, a parity error correction code is added to each control program in order to perform error correction on the receiving side.

The signal synthesis coding unit 104 time-division-multiplexes each coded broadcast content information for each broadcast channel and sends it to the transmission unit. Also, the encoded control information is time-division multiplexed with other control information and sent to the transmitting unit.

The transmitting section 105 includes a signal synthesis coding section 104.
In, the broadcast content information time-division multiplexed for each broadcast channel is modulated at a specific frequency for each broadcast channel and transmitted. Also, the control information that is time-division multiplexed is modulated at a specific frequency and transmitted.

Further, the transmission control section 107 has the transmitting device 10
The operation of each unit in 1 is controlled.

Here, FIG. 2 shows the relationship between the moving image information and the control information transmitted from the transmitting device. The example shown in FIG. 2 shows a case where the broadcast content information is all moving images.

In the figure, reference numerals 200, 210 and 220 denote broadcast content information which is time division multiplexed for each broadcast channel. As shown in the figure, with respect to the broadcast channel 200, three moving images 201, 202, and 203 are displayed on the broadcast channel 210.
For the broadcast channel 220, and four video images 221, 222, 22 for the broadcast channel 220.
3 is time-division multiplexed.

In the broadcast channel 230, control information 231, 232, 233 for controlling broadcast contents of the broadcast channels 200, 210, 220, respectively, is time-division multiplexed.

In the broadcast channel 230, the respective control information 231, 232, 233 are time-division multiplexed in a predetermined order, and a synchronization flag for specifying the position of each control information is used as the control information. Add. The control information is repeatedly broadcast at certain intervals as long as the control information is valid. This is because the program channel reception may start in the middle of the program.

Hereinafter, a broadcast channel in which this control information is time-division multiplexed is called a "control channel", and a broadcast channel in which the broadcast content information is time-division multiplexed is called a program channel.

Now, the function of each part of the receiving device 102 will be described.

The user operation input unit 113 is used by the receiving device 10.
Capture the recipient's instructions for 2. Now, it is assumed that a program channel desired to be watched is selected as an instruction of the receiver. Here, the recipient is only allowed to select a broadcast channel other than the control channel, that is, a program channel.

The receiver 108 receives and demodulates the control channel transmitted from the transmitter 101.

The signal separation unit 109 separates the time division multiplexed control information in the control channel demodulated by the reception unit 108, and extracts the control information for the selected program channel based on the synchronization flag. , To decrypt. The signal separation unit 109 inspects the added parity code for the control signal, and if there is an error, corrects the error.

The reception controller 114 sets the receiver 108, the signal separator 109, and the decoder 110 according to the decoded control information.

The receiving unit 108 receives and demodulates the selected program channel according to the setting contents from the reception control unit 114.

The signal separation unit 109 separates each broadcast content information in the demodulated program channel according to the setting contents from the reception control unit 114, and passes either of the separated broadcast content information to the decoding unit 110. .

The decoding section 110 decodes the broadcast content information according to the setting content from the reception control section 114. In this embodiment, the decoding unit 110 uses a DSP (Ddigital).
Signal processor). Then, the decryption unit 110 executes the decryption program set by the reception control unit 114.

The display unit 111 receives the decoded broadcast content information from the decoding unit 110 and displays it.

Next, the contents of the control information used in this embodiment will be described. The control information is generated for each program broadcast on the program channel.

FIG. 3 shows the contents of the control information. The illustrated example shows control information for a program channel in which all the time-division-multiplexed broadcast content information is moving image data.

As shown in the figure, the control information 300 includes a program ID 310, image information 320, communication information 330,
It comprises a control program 340.

The program ID 310 is a unique identification number given to each control information for each program to be broadcast.

The image information 320 is information for notifying the image to be transmitted by the program channel corresponding to the control information.

The image information 320 includes an image size 321, an image frame number 322, a pixel configuration 323, and a pixel arrangement 3
It consists of 24.

The image size represents the number of vertical and horizontal pixels of the image. The number of image frames indicates the frame rate of images per second and the number of videos multiplexed in the corresponding program channel.

The pixel configuration is such that one pixel corresponds to each R
It shows how many bits are expressed per GB component. In the illustrated example, each bit has 8 bits (256 gradations).

The pixel arrangement shows how each color component information is stored in the moving image data. The example shown in FIG. 3 shows that each color component is stored screen by screen in the order of the R screen, the G screen, and the B screen.

The communication information 330 includes a communication method 331, the number of bits 332, and a synchronization frame signal 333.

The communication method 330 is information for notifying the communication method of the program channel corresponding to the control information. The illustrated example shows that the corresponding program channel employs pulse code frequency modulation (PCM / FM) as the communication method.

The number of bits 342 indicates the bit length of data. In the illustrated example, it is set to 8 bits. The synchronization frame signal 333 indicates the data value used in the synchronization frame that serves as a reference for the position of the moving image data on the program channel. In the illustrated example, the data of the synchronization frame is OxFFFFFFFF.

The control program 340 is used by the reception controller 1
14 is a program loaded into the program 14, and is a program for decoding the moving image of the selected program channel and performing various services.

The control program 340 includes a control program 341, a decryption program 342, and dialogue screen data 3.
It consists of 43.

The control program 341 is a program for providing various services regarding the program channel corresponding to the control information.

The image decoding program 342 is a program for decoding the encoded and transmitted image information. In the illustrated example, a run length decoding program is stored.

The interactive screen data 343 is data of a menu screen used by the control program to provide various services to the viewer.

As described above, the transmitting apparatus 101 includes in the control information the information necessary for reproducing the transmitted broadcast content information and the program for selecting the broadcast content information.

The first operation example of the television broadcasting system according to this embodiment will be described below.

Now, let us consider a program which broadcasts the cooking situation simultaneously photographed by a plurality of cameras.

FIG. 4 shows the state of such program broadcasting.

First, the operation of the transmitter will be described.

In the figure, the input device 1 in the transmitter,
Reference numerals 2, 3 (401, 401, 403) respectively capture a hand image, a kitchen knife surface image, and an entire operator image. An image taken by the input device 1 is called an image 1, an image taken by the input device 2 is called an image 2, and an image taken by the input device 3 is called an image 3.

The transmission component 101 is the signal synthesis coding unit 10.
In step 4, each photographed image is digitally sampled, the sampled data is compression-encoded for each frame by the run-length method, and each image data after compression encoding is image 1, image 2, image They are sequentially arranged in the order of 3 and time division multiplexed. Then, the transmission section 105 modulates at the frequency assigned to the program channel 404,
Transmit on program channel 404. In addition to this, as a main image encoding method, there is a method by DCT (discrete cosine transform) and the like. In this embodiment, sampled image data is converted by the DCT method.
It may be compressed and encoded. When compression-encoded by the DCT method, the image decoding program of the control information is a program that executes inverse DCT.

Also, control information for controlling the image 1, the image 2, and the image 3 on the program channel 404 by the receiving device is supplied from the program storage unit 106 to the signal synthesis encoding unit 1.
04, and time-division-multiplex with control information for other program channels. Then, the transmission section 105 modulates the time-division multiplexed control information and transmits it on the control channel.

Here, the control information about the program channel 404 includes a control program 341, which is a program for allowing the receiver to select an image from which camera to display.

Next, the operation of the receiving device 102 side for receiving the program channel 404 will be described with reference to the flowcharts shown in FIGS.

When the reception starts, the reception control section 114 first confirms the program channel to be received (step 50).
2) Read the program ID (310 in FIG. 3) in the control information about the program channel 404 decoded by the signal separation unit 109 (step 503) and compare the program ID of the control information loaded last time If it is different (step 504), the current control information is loaded into the reception controller 114 as new control information (step 505). After receiving the control information, the reception control unit executes the control program 341 in the control information (step 506).

A flow chart of the control program is shown in FIG.

As shown, the control program is executed as follows.

First, the receiving section 108, the signal separating section 109, and the decoding section 110 are set according to the received control information (step 601). Specifically, the communication information 330 in the control information is sent to the receiving unit 108. The receiving unit 108
Based on this information, the data on the program channel 404 is sequentially demodulated. Then, the demodulated data is sent to the signal separation unit 109. In addition, the reception control unit 114 includes the signal separation unit 1
The image information 320 is sent to 09. Based on this information, the signal separation unit 109 uses the demodulated data on the program channel 404 to determine the data of image 1, the data of image 2, and the image 3
Data is separated, and one of the separated image data is sent to the decoding unit 110 according to an instruction to the reception control unit 114.
Now, at the start of reception, the data of image 1 is passed to the decoding unit 110 as a default (step 60).
2). Hereinafter, an image based on the image 1 data is referred to as screen 1, an image based on the image 2 data is referred to as screen 2, and an image based on the image 3 data is referred to as screen 3. Further, the reception control unit 114 sends the image decoding program 342 to the decoding unit 110. The decoding unit 110 executes the image decoding program to decode the image data received from the signal separation unit 109 and display it on the display unit 111.

Then, the screen data specified in the control program 341 of the interactive screen data 343 is displayed so as to be superimposed on the display screen of the display unit 111 (step 603). As a result, a user selection menu as shown by reference numeral 405 in FIG. 4 is displayed in the lower part of the display screen of the display unit 111. This user selection menu is for selecting an image to be displayed on the display unit.

Next, the following processing is performed for each image frame (step 604).

The reception controller 114 receives an instruction from the viewer according to the user selection menu (step 60).
7) Instruct the signal separation unit 109 to switch the output to the designated image data. This image data is decoded and displayed on the display unit 111. That is, the viewer can select and view an arbitrary image from the image of the kitchen scene, the image of the kitchen knife, and the entire image of the worker in the cooking scene (step 608).
~ 611).

Further, the reception control unit 114 checks, for each image frame, whether the program ID of the control information to be received is changed or whether the program channel is switched by the user (steps 605 and 606). If there is a change in the program ID of the control information to be received, or if the program channel is being switched, the control program is terminated and the process returns to the initial process of fetching the control information.

As described above, according to this embodiment, the control information can be used to specify the multiplicity of the broadcast content information on each program channel, the coding rule of the broadcast content information, etc. to the receiving apparatus. Therefore, the transmitting side can perform broadcasting in a mode according to the service provided. In particular, by transmitting a program for decoding the encoded broadcast content information to the receiving device by the control information, various coding rules can be used.

Further, since the control information can send a program for controlling the display of the broadcast content information on each program channel according to the request of the user of the viewer to the receiving side, the viewer can The broadcast content information can be flexibly used in response to the request from the user.

That is, according to the broadcasting system of the present embodiment, the broadcasting can be realized if only the standard regarding the control information exists, and a unique standard on the program channel is not required.

In the above description, in the receiving device 102, the control information for the selected program channel is
It is effective for the broadcast content information received between the time when the control information is received and the time when the next different control information is received. However, the control information may specify the image broadcast content information to be controlled, and the control information may be validated only for the specified broadcast content information. To this end, in the transmitting device 101, information about the broadcast content information to be controlled by the control information is stored in the control information and transmitted, and the receiving device temporarily stores the received control information and stores it. The control information is validated when the broadcast content information to be controlled is received, and the control information is invalidated when the broadcast content information to be controlled is validated by the validated control information. You can do it.

In the above description, the broadcast frequency of the program channel is fixed, but the broadcast frequency of the program channel may be variable. In this case, the transmission device 101 stores information for designating the broadcast frequency of the corresponding program channel in the control information and transmits it.
The reception control unit 114 of the reception device 102 instructs the reception unit 108 to receive the broadcast frequency based on the broadcast frequency information in the control information corresponding to the selected program channel.

Further, in the above description, the control channel and the program channel are provided separately, but the control information may be transmitted by being multiplexed with the broadcast content information on any one of the predetermined program channels. . However, in this case, the broadcast position of the control information and the broadcast frequency of the program channel in which the control information is multiplexed are fixed. This is because the receiving device 102 can uniquely receive the control information corresponding to the selected program channel according to the viewer's selection of the program channel.

Further, in the present embodiment, the decoding unit 11
By configuring 0 as a DSP and setting a decoding program, it is possible to decode broadcast content information of an arbitrary coding rule. However, when the types of encoding methods used in broadcasting are limited, a dedicated encoding means may be provided for each encoding method used in broadcasting to decode the broadcast content information. In this case, the transmission device 101 stores the coding system designation information in the control information instead of the screen decoding program. Then, the reception control unit 114 of the receiving apparatus 102 activates only the decoding means corresponding to the designated coding method according to the designation information of the coding method.

The second part of the broadcasting system according to this embodiment will be described below.
An operation example of is shown.

In this operation example, the broadcast content information is temporarily stored and used.

The storage of the broadcast content information is performed as follows.

When the program channel to be stored is set by the viewer, the reception control unit 114 records the control information about the set program channel and the program channel data in the received signal storage unit 112 in parallel. However, if the reception signal storage unit 112 cannot store the data in parallel, the control information and the data of the program channel are multiplexed and stored, and separated at the time of reproduction to be restored into two parallel signals.
If the control information changes during storage, the control information after the change is also stored. Each broadcast content information on the program channel is attached with a program name header for each program.
It is assumed that a unique title is attached as a header to each group of information in the program. Received signal storage unit 1
A video tape deck, a rewritable optical disk device, or the like can be used as the device 12.

The reproduction operation of the broadcast content information stored in the received signal storage unit 112 will be described with reference to the flowchart shown in FIG.

When there is a reproduction instruction from the user operation input unit 113, the reception control unit 114 checks the control information stored in the reception signal storage unit 112 in the order of storage.
When the control information is detected, the program ID 310 of the control information is compared with the current program ID (step 702). If they are different, the reception control unit 11
4, the control program 341 is loaded from the control information (step 704), and the control program 341 is executed (step 705).

A flow chart of the control program used in this operation example is shown in FIG.

As shown in the figure, the reception control unit 114 which has started the execution of the control program 341 first receives the reception unit 10.
8, the communication information 330 in the control information, the signal separation unit 109
The image information 320 and the image decoding program 342 are set in the decoding unit 110 (step 801).

Next, at present, the received signal storage unit 11
It is confirmed whether or not reproduction is instructed from 2 (step 802).

When reproduction is not instructed, the normal processing described in the first operation example (see FIG. 6) is performed. When reproduction is instructed, the relationship between the storage position on the received signal storage unit 112 of each broadcast content information in the program corresponding to the control information is broadcasted for each title attached to the broadcast content information. It is confirmed from the header of the content information (step 804).

Then, the following processing is performed until the reproduction is completed (step 805).

That is, first, as shown in FIG. 10, the reproduction menu 1000 is displayed on the display screen of the display unit 111 (step 806). The items of the reproduction menu 1000 are the program name 1001 corresponding to the control information, the titles 1002 to 1005 of each information in the program, and the next program 100.
It is 6. The example shown in FIG. 10 is an example in the case of reproducing a program called "news program" including information titled "With me" and information titled "weather forecast". Title of each information in the program 1002-100
5 corresponds to the title attached to the broadcast content information.

Next, when the viewer inputs a title of information to be viewed from the reproduction menu by the user operation input unit 113 (step 807), the corresponding title is attached as a header according to the designation. The broadcast content information thus reproduced is reproduced (steps 808 and 809).

If the next program is designated, the reproduction start position is advanced to the end position of the broadcast content information attached with the current program name as a header (step 810), and the previous control signal check processing is performed. Run from

Now, the reproduction of the broadcast content information information with the title designated by the viewer as a header is performed as shown in FIG.
Follow the flowchart shown in.

That is, first, the reception control section 114 erases the display of the menu screen shown in FIG. 10 (step 901). Next, the storage location of the earliest broadcast content information and the storage location of the final broadcast content information with the designated title as a header are obtained (steps 902, 90).
3).

Then, the broadcast content information from the obtained earliest position to the final position is reproduced (step 904,
905). The reproduced broadcast content information is decoded by the decoding unit 110 and displayed on the display unit 111. Decoding section 1
The reception controller 114 decodes the broadcast content information reproduced based on the set image decoding program 342.

As described above, according to this embodiment, it is possible to reproduce only the necessary information part from the stored program.

The third operation example according to this embodiment will be described below.

In the third operation example, as shown in FIG. 11, an external device is connected to the receiving device 102 and controlled.

In FIG. 11, reference numeral 1201 is an external device control unit, 1202 is an electronic keyboard, 1203 is an electronic guitar, 1204 is a mixer, and 1205 is a speaker.

Electronic keyboard 1202, guitar 1203
Is MIDI (Musical Instrument Digital Interfac
It is an electronic musical instrument that can be controlled by e).

In this operation example, the transmitter 101 is
The sound of each playing musical instrument is separated and encoded, and each is used as broadcast content information and time-division multiplexed and transmitted on the program channel. Further, the control information corresponding to this program includes a decoding program for decoding the encoded voice of each musical instrument and MIDI data which is control information of an external musical instrument connected to the receiving device. MIDI data is created for each part included in the performance and included in the control information. Further, the control program 341 in the control information includes a program for accepting designation of an external musical instrument to be controlled by MIDI data. The control information is transmitted to the MI at the receiving device in synchronization with the performance transmitted on the program channel.
Send DI data in real-time so that it can be used.
Further, the broadcast content information is transmitted with synchronization data for synchronizing with the MIDI data.

On the other hand, on the side of the receiving device that has selected this program, when the control information is received, the reception control section 114 activates the control program and decodes the decoding program.
Set to. The decoding unit 110 decodes the received voice according to a decoding program, synthesizes the voice of each musical instrument, and outputs the synthesized voice.

Further, the reception control unit 114 displays the screen shown in FIG. 12A on the display screen of the display unit 111 to display that MIDI data is available in this program and accepts the start of use of MIDI data. .

If the use of MIDI data is designated, the menu shown in FIG. 12B is displayed, and designation of automatic performance or manual performance is accepted.
Accept the part that wants to use DI data.

MIDI is specified for automatic performance, and MIDI
When the part desired to use the data is designated, the decoding unit 110 is instructed not to output the voice for the designated part. Then, based on the synchronization data attached to the broadcast content information, the external device control unit 120 causes the connected electronic musical instrument to perform in synchronization with the voice being output.
The MIDI data of the part designated as 1 is output.

The external device control section 1201 sends the received data to the MIDI bus, controls each musical instrument, and outputs the sound of the designated part.

Further, when the manual play of playing the musical instrument is designated by the user, the reception control unit 114 causes the decoding unit 110 to output no sound for the designated part.
To end the processing.

As described above, according to the present operation example, it is possible to perform with the electronic musical instrument which one has in accordance with the transmitted musical performance.

The present embodiment is not limited to the broadcast format, but can be applied to one-to-one image communication such as a videophone in the same manner.

Further, in the present embodiment, each broadcast channel has been described as a physical channel having a different broadcast frequency.
However, the present method can be applied even when each broadcast channel is a logical channel. That is, when all program channels and control channels are multiplexed on one physical channel by time division multiplexing or the like, the position of the control channel and the position of each control information in the control channel are fixed and selected. By the control information corresponding to the selected channel,
The position of the selected program channel and the broadcast content information in the program channel may be specified.

[0111]

As described above, according to the present invention, in order to be able to provide a variety of services to the viewer, there is flexibility in the compression method, the multiplexing method, the viewer's video selectivity, and the like. It is possible to provide a television broadcasting system which has been set.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a television broadcasting system according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing the appearance of broadcast channels used in an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a first operation example of the television broadcasting system according to the embodiment of the present invention.

FIG. 4 is an explanatory diagram showing control information used in an embodiment of the present invention.

FIG. 5 is a flowchart showing an operation of a reception control unit in the first operation example.

FIG. 6 is a flowchart showing an operation of a reception control unit in the first operation example.

FIG. 7 is a flowchart showing an operation of a reception control unit in the second operation example.

FIG. 8 is a flowchart showing an operation of a reception control unit in the second operation example.

FIG. 9 is a flowchart showing an operation of a reception control unit in the second operation example.

FIG. 10 is an explanatory diagram showing a menu displayed on a display unit in a second operation example.

FIG. 11 is a block diagram showing a configuration of a receiving side system in a third operation example.

FIG. 12 is an explanatory diagram showing a menu displayed on a display unit in a third operation example.

[Explanation of symbols]

101 transmitter 102 receiver 103 input device 104 signal synthesis coding unit 105 transmitter 106 program storage unit 107 Transmission control unit 108 Receiver 109 signal separator 110 Decoding unit 111 display 112 Received Signal Storage Unit 113 user operation input section 114 reception control unit

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI H04N 7/081 (72) Inventor Masayasu Futagawa 4026 Kujimachi, Hitachi City, Ibaraki Hitachi Ltd. Hitachi Research Laboratory (72) Inventor Tanifuji Shinya 4026 Kuji Town, Hitachi City, Ibaraki Prefecture In Hitachi Research Laboratory, Hitachi, Ltd. (72) Inventor Atsushi Kawabata 4026 Kuji Town, Hitachi City, Hitachi City, Ibaraki Hitachi Ltd., Hitachi Research Laboratory (72) Inventor, Norito Watanabe Hitachi City, Ibaraki Prefecture Kujimachi 4026, Hitachi, Ltd., Hitachi Research Laboratory (72) Inventor Kazushige Maeda, 1-15-4 Honmachi, Higashi-ku, Osaka-shi, Osaka (56) Reference, Japanese Patent Laid-Open No. 61-49574 (Hitachi, Ltd.) JP, A) JP 61-65346 (JP, A) JP 63-193683 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04N 7 / 00-7/088 H04N 5/38-5/46 H04H 1/00

Claims (5)

(57) [Claims] 1. A digital device having a plurality of programs and control information.
A receiving unit that receives a broadcast signal, an operation input unit that receives a user's instruction, and a digital broadcasting signal received by the receiving unit.
Displays programs selected by the user via the input unit
And a processing section for outputting to the section, the program is attached with identification information, and is encoded.
The control information indicates the contents of each of the plurality of programs.
Including information to identify and encoding
The processing unit is provided with a plurality of decoding handsets corresponding to different encoding systems.
Has a stage, and specifies the contents of each of the plurality of programs included in the control information.
A menu screen containing information for setting is displayed on the display section.
Shows one program from the user via the operation input unit.
The number of information that is selected by the user through the operation input unit is accepted.
Uses the identification information corresponding to the information to identify the contents of the set
And extracting the program from the digital broadcast signal
Both are included in the control information among the plurality of decoding means.
Use the decoding means according to the information about
The extracted program can be decrypted and displayed on the display unit.
And a television broadcast signal receiving device characterized by: 2. A television broadcast signal reception according to claim 1.
In the device, the information regarding the encoding is the code used for encoding the program.
Television characterized in that it is information representing an encoding system
Broadcast signal receiver. 3. A television broadcast signal reception according to claim 2.
In the apparatus , the run length method or the DCT method is used as the encoding method.
Television broadcasting signal receiving device characterized by being included
Place 4. A device according to any one of claims 1 to 3.
In the digital broadcast signal receiving device, the information for specifying the content of the program is the program
Television broadcast signal characterized by being a title
Receiver. 5. Identification information is added and encoded.
Multiple programs and the content of each of the multiple programs
Control information including information for encoding and encoding
And a step of receiving a digital broadcast signal including: and a content of each of the plurality of programs included in the control information.
Display a menu screen containing information for setting on the display.
The contents of one program from the user via the operation input section.
The step of accepting the selection of the information for setting, and the number of the selection accepted by the user via the operation input unit
Uses the identification information corresponding to the information to identify the contents of the set
And extracting the program from the digital broadcast signal
In both cases, the control information among the decryption means prepared in advance is used.
Decoding procedure according to the encoding information included in the information
Stage to decode the extracted program and display it on the display.
A television set having the steps of:
Broadcast signal reception method.