JP2016208365A - Receiving device, control method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform control to prevent a user from being confused, even when a broadcast service of a guide destination is not receivable.SOLUTION: A receiving device comprises: a determination part for determining whether a broadcast service is receivable or not; and a switch control part which controls whether or not to switch from a first broadcast service selected presently to a second broadcast service, on the basis of a result of the determination by the determination part on whether the second broadcast service is receivable or not.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a receiving apparatus, a control method, and a program.

  There is a service called a CA alternative service that guides to a “guide channel” that provides contract guidance when a scrambled broadcasting service (paid channel, content-protected channel, etc.) is selected with an unsigned receiving device ( Non-patent document 1). This “Guide Channel” is broadcast in a non-scrambled or descrambleable state even if it is not contracted. For example, this CA alternative service is provided on a pay channel for BS digital broadcasting and a pay channel for CS digital broadcasting.

Radio Industry Association, “ARIB TR-B15 6.6 Edition BS / Broadband CS Digital Broadcasting Operation Rules”

  Conventionally, the CA alternative service was guidance in the BS channel or guidance in the CS channel, but there is a possibility that guidance from the BS channel to the CS channel or guidance from the CS channel to the BS channel will be performed in the future. There is. In this case, it is assumed that there are cases where it is impossible to receive the broadcast service of the guidance destination due to the specifications of the receiver, antenna, distributor, and the like. If the destination broadcast service is not receivable, the “Guide Channel” cannot be displayed, and information indicating that the broadcast cannot be received will be displayed instead. The service itself has changed, and there is a concern that it may confuse users.

  One aspect of the present invention is to provide a receiving device, a control method, and a program for controlling the user so as not to be confused even when the broadcasting service of the guide destination cannot be received. To do.

  According to one aspect of the present invention, the determination unit that determines whether or not the broadcast service is receivable and the determination unit determines whether or not to switch from the first broadcast service being selected to the second broadcast service. A switching control unit that controls based on a determination result of whether or not the determined second broadcast service is receivable.

  Further, according to one aspect of the present invention, in the reception device, the switching control unit may be configured such that the first broadcast service being selected is not contracted and a specific descriptor is included in the broadcast wave being selected. Then, it is controlled whether to switch from the first broadcasting service being selected to the second broadcasting service.

  Further, according to one aspect of the present invention, in the receiving device, the switching control unit may be configured such that the first broadcast service being selected is a broadcast service for advanced broadband satellite digital broadcasting, and the broadcast service is not contracted, In addition, when a specific descriptor is included in the broadcast wave being selected, whether to switch from the first broadcast service being selected to the second broadcast service is controlled.

  In addition, according to an aspect of the present invention, in the receiving device, when the determination unit determines that the second broadcast service is receivable by the determination unit, the switching control unit receives the first broadcast service from the first broadcast service. When the determination unit determines that the second broadcast service cannot be received, the first broadcast service is not switched to the second broadcast service.

  Further, according to one aspect of the present invention, when the reception device determines that the second broadcast service can be received by the determination unit, the first broadcast service to the second broadcast service is determined. A screen control unit that displays on the display unit an operator that accepts an operation that permits switching; and an operation input unit that accepts an operation on the operator displayed on the display unit, the switching control unit including the operation When the input unit receives an operation on the operation element, the input unit switches from the first broadcast service to the second broadcast service.

  Further, according to one aspect of the present invention, there is provided a screen control unit that causes the receiving device to display on the display unit an operator that accepts an operation of permitting switching from the first broadcast service to the second broadcast service. An operation input unit that receives an operation on the operation element displayed on the display unit, and the determination unit can receive the second broadcast service when the operation input unit receives an operation on the operation element. It is determined whether or not.

  Further, according to an aspect of the present invention, in the reception device, when the broadcast wave of the first broadcast service includes information indicating a link destination including information related to the contract of the first broadcast service, the switching is performed. When the determination unit determines that the second broadcast service is not receivable, the control unit switches to the information on the link destination connected via the communication network.

  In addition, according to one aspect of the present invention, when the first broadcast service being selected is not contracted and a specific descriptor is included in the broadcast wave being selected, A screen control unit that displays an operation element that accepts an operation for permitting switching to a broadcast service on a display unit, an operation input unit that accepts an operation on the operation element displayed on the display unit, and the operation input unit that performs the operation A switching control unit that switches from the first broadcasting service to the second broadcasting service when an operation on the child is accepted, and the screen control unit switches to the second broadcasting service by the switching control unit. If received, it is a receiving device that causes the display unit to display an operation element that accepts at least an operation of switching to the first broadcast service.

  One embodiment of the present invention is a control method in a reception device, in which a determination unit determines whether or not a broadcast service is receivable, and a switching control unit is a first channel being selected. A switching control process for controlling whether to switch from the second broadcast service to the second broadcast service based on a determination result of whether the second broadcast service determined by the determination unit is receivable; Is a control method including

  One embodiment of the present invention is a control method in a receiving device, in which the screen control unit includes a specific descriptor in a broadcast wave in which the first broadcast service being selected is not contracted and the channel being selected is selected. A screen control process for displaying on the display unit an operation element that accepts an operation for permitting switching from the first broadcast service to the second broadcast service, and an operation input unit is displayed on the display unit. An operation input process for receiving an operation on the operation element, and a switching control process for switching from the first broadcast service to the second broadcast service when the switching control unit receives an operation on the operation element. When the screen control unit is switched to the second broadcast service by the switching control unit, at least an operator for accepting an operation to switch to the first broadcast service A screen control process to be displayed on the display unit, a control method comprising.

  Further, according to one embodiment of the present invention, a determination procedure for determining whether or not a broadcast service is receivable is received by a computer, and whether or not to switch from the first broadcasting service being selected to the second broadcasting service. , A switching control procedure for performing control based on a determination result as to whether or not the second broadcast service determined by the determination procedure is receivable.

  In addition, according to one aspect of the present invention, when a first broadcast service being selected is not contracted and a specific descriptor is included in the broadcast wave being selected, A screen control procedure for displaying on the display unit an operator for accepting an operation permitting switching to the second broadcast service; an operation input procedure for accepting an operation on the operator displayed on the display; and the operation input procedure When an operation on the operation element is received, a switching control procedure for switching from the first broadcasting service to the second broadcasting service, and a switching to the second broadcasting service by the switching control procedure, at least A program for executing a screen control procedure for displaying an operator for accepting an operation of switching to the first broadcast service on the display unit. That.

  According to the present invention, it is possible to perform control so as not to confuse the user even when the broadcasting service of the guide destination cannot be received.

1 is a block diagram showing an example of a configuration of a digital broadcast system according to a first embodiment. The figure explaining the guidance of the broadcast service in CA alternative service. The figure which shows the example of a display screen displayed in the CA alternative service which concerns on 1st Embodiment. The block diagram which shows an example of a structure of the transmitter which concerns on 1st Embodiment. The figure which shows an example of a link descriptor. The block diagram which shows an example of a structure of the receiver which concerns on 1st Embodiment. 5 is a flowchart showing an example of CA alternative service processing according to the first embodiment. The figure which shows an example of an error screen. The figure which shows an example of the contract guidance screen displayed by "guidance channel." The flowchart which shows the specific example of CA alternative service processing at the time of the advanced wideband broadcast which concerns on 1st Embodiment. The flowchart which shows an example of the CA alternative service process at the time of the advanced wideband broadcast which concerns on 2nd Embodiment. The figure which shows an example of the poor reception screen which concerns on 2nd Embodiment. The figure which shows an example of the explanatory screen which concerns on 3rd Embodiment. The flowchart which shows an example of the CA alternative service process at the time of the advanced wideband broadcast which concerns on 3rd Embodiment. The flowchart which shows an example of the CA alternative service process at the time of the advanced wideband broadcast which concerns on 4th Embodiment. The figure which shows an example of the link descriptor which concerns on 5th Embodiment. The block diagram which shows an example of a structure of the receiver which concerns on 5th Embodiment. The flowchart which shows the example which applied the contract page display process to the CA alternative service process of 2nd Embodiment. The flowchart which shows the example which applied the contract page display process to the CA alternative service process of 3rd Embodiment. The flowchart which shows the example which applied the contract page display process to the CA alternative service process of 4th Embodiment. The flowchart which shows an example of the contract page display process which concerns on 5th Embodiment. The figure which shows an example of the display confirmation screen which concerns on 5th Embodiment. The figure which shows an example of the contract page screen which concerns on 5th Embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
[First embodiment]
First, a first embodiment of the present invention will be described.
(Outline of digital broadcasting system 1)
FIG. 1 is a block diagram illustrating an example of a schematic configuration of a digital broadcasting system 1 according to the present embodiment. As shown in the figure, the digital broadcast system 1 includes a transmission device 10, a broadcast satellite 15, and a reception device 20. The transmission device 10 is provided in a broadcasting station where a broadcaster broadcasts, and provides a broadcasting service by satellite digital broadcasting. For example, the transmission device 10 transmits a broadcast wave of satellite digital broadcast program data to the broadcast satellite 15 through the antenna 11 as a broadcast service.

  The broadcast satellite 15 includes BS (Broadcasting Satellite) which is a broadcast satellite dedicated to broadcasting and CS (Communication Satellite) which is a communication satellite used for communication. Whether to use BS or CS is determined in advance according to the group of frequency bands of broadcast waves. Here, one BS broadcasting satellite 15 (BS) and one CS broadcasting satellite 15 (CS) are illustrated, but the type and number of broadcasting satellites 15 are not limited thereto. In addition, although one BS transmission device 10 (BS) and one CS transmission device 10 (CS) are illustrated, the number of transmission devices 10 that broadcast using each broadcasting satellite 15 is generally Multiple. In the following description, the BS and CS are simply referred to as the transmission device 10 and the broadcast satellite 15 when there is no particular distinction between BS and CS.

  The receiving device 20 is an example of a receiving device that receives a broadcast wave broadcast in the digital broadcasting system 1. Here, one receiver 20 is illustrated, but the digital broadcast system 1 may include a plurality of receivers 20. For example, the receiving device 20 is a television receiver (television) including the display unit 218. The reception device 20 receives the broadcast wave transmitted from the transmission device 10 via the broadcast satellite 15 via the reception facility 30, decodes the program data included in the received broadcast wave, and outputs it as video and audio. .

  The reception facility 30 includes an antenna 31, a booster 32, a distributor 33, a cable 34, and an outlet 35. The antenna 31 receives a broadcast wave transmitted from the broadcast satellite 15, converts the received broadcast wave into an IF signal (hereinafter also simply referred to as “reception signal”), and outputs the IF signal to the booster 32. For example, the antenna 31 is designed and installed according to the type of the broadcast satellite 15, and there can be a broadcast wave that can be received and an impossible broadcast wave depending on the type. For example, the antenna 31 may be compatible or not compatible with the type of broadcast wave, such as a BS antenna, a CS antenna, or a BS / CS antenna. Further, even if the same type of broadcasting satellite 15 (for example, CS) is used, different antennas 31 need to be prepared if the positions of the satellites are different.

  The booster 32 is a signal amplifier that amplifies and outputs an input received signal. For example, the booster 32 amplifies the input received signal with a set gain and outputs it. The distributor 33 distributes the reception signal output from the booster 32 into a plurality of reception signals while preventing impedance matching from being disturbed. The cable 34 is a signal wiring that transmits a reception signal output from the distributor 33 to the reception device 20 via the outlet 35 or the like. The booster 32, the distributor 33, the outlet 35, and the like may be compatible or non-compatible depending on the type of broadcast wave, such as for BS, CS, or BS and CS.

  By the way, the broadcasting service broadcast from the transmission device 10 can be viewed with the scramble being released only when a contract is made (note that the contract includes registration and the like and is simply described as a contract). There are also scrambled broadcast services (paid channels, content-protected channels, etc.). For example, when a scrambled broadcasting service is selected by an uncontracted receiving device 20, there is a service that leads to a “guidance channel” for promotion that provides contract guidance. This service is defined in ARIB (Association of Radio Industries and Businesses) TR-B15 under the name “CA alternative service”, and is described using this name. Note that the scrambled broadcasting service includes a paid channel and a content-protected channel, but may be simply referred to as a paid channel below. In the case of the description, the scramble broadcasting service is not limited to the paid channel.

  The current BS / CS digital broadcasting CA alternative service is based on an uncontracted scrambled broadcasting service (hereinafter also referred to as “movement source broadcasting service”) to a “guide channel” (hereinafter referred to as “destination channel”). The guidance to the “broadcast service” is performed in the BS channel or the CS channel. However, in the future, guidance from the BS channel to the CS channel or guidance from the CS channel to the BS channel may be performed. For example, in a CA alternative service for advanced broadband satellite digital broadcasting that is currently under consideration for the standard, guidance from the BS channel to the CS channel or guidance from the CS channel to the BS channel may be performed.

Here, advanced broadband satellite digital broadcasting is defined in Chapter 5 Section 3 or Chapter 6 Section 5 of the standard system for transmission related to digital broadcasting among standard television broadcasting and the like (2011 Ministry of Internal Affairs and Communications Ordinance No. 87) Digital broadcasting using the advanced broadband transmission system. The BS channel in advanced broadband satellite digital broadcasting is a BS channel by advanced BS digital broadcasting, and the CS channel in advanced broadband satellite digital broadcasting is a CS channel by advanced broadband CS digital broadcasting. Advanced BS digital broadcasting is digital broadcasting based on an advanced broadband transmission system performed by a broadcasting satellite station that uses radio waves having a frequency exceeding 11.7 GHz and not exceeding 12.2 GHz. Advanced broadband CS digital broadcasting is digital broadcasting by an advanced broadband transmission system performed by a broadcasting satellite station that uses radio waves having a frequency of more than 12.2 GHz and less than or equal to 12.75 GHz.
In the following, “advanced broadband satellite digital broadcasting” is also abbreviated as “advanced broadband broadcasting”.

  FIG. 2 is a diagram for explaining the guidance of the broadcast service in the CA alternative service. In this figure, “BS right-handed” refers to a current BS digital broadcast in which the broadcast wave received by the receiving facility 30 uses right-handed polarization (right-handed circular polarization, right-handed polarization). Show. “CS right-handed” indicates current CS digital broadcasting in which the broadcast wave received by the receiving facility 30 uses right-handed polarization (right-handed circular polarization, right-handed polarization). Yes. On the other hand, “BS left-handed, advanced BS” indicates advanced BS digital broadcasting in which the broadcast wave received by the receiving facility 30 uses left-handed polarization (left-handed circularly polarized light, left-handed polarized wave). “CS left-handed, advanced broadband CS” indicates advanced broadband CS digital broadcasting in which the broadcasting wave received by the receiving facility 30 uses left-handed polarization (left-handed circularly-polarized, left-handed-polarized). Yes.

  The example shown in FIG. 2 (a) indicates that the current CA alternative service guides the source broadcast service to the destination broadcast service in the BS channel or the CS channel. The example shown in FIG. 2 (b) is a CA alternative service for advanced broadband broadcasting, and there is guidance within the CS channel of advanced broadband CS digital broadcasting. For example, from the BS channel of advanced BS digital broadcasting, advanced broadband CS digital broadcasting can be performed. This indicates that there is also a guidance to the CS channel. There may be guidance in the BS channel of advanced BS digital broadcasting, or guidance from the CS channel of advanced broadband CS digital broadcasting to the BS channel of advanced BS digital broadcasting.

  Here, as in the example shown in FIG. 2A, in the case of guidance within the BS channel or CS channel, if the source broadcast service can be received, the destination broadcast service can also be received. is there. On the other hand, as shown in FIG. 2B, in the case of guidance from the BS channel to the CS channel (or vice versa), even if the source broadcast service is receivable, the destination broadcast service is received. It is not always possible. For example, when any one or more of the antenna 31, the booster 32, the distributor 33, the outlet 35, and the reception device 20 or the reception device 20 is not compatible with the destination broadcast service, the reception device 20 transmits the destination broadcast. Service is poorly received.

  The example shown in FIG. 2 (c) shows a case where the broadcasting service at the movement destination is a reception failure in the CA alternative service for advanced broadband broadcasting. In the example shown in the figure, for example, the antenna 31 and the receiving device 20 are compatible with advanced broadband broadcasting. However, since the booster 32, the distributor 33, and the outlet 35 are conventional products, a high frequency of 2600 MHz or higher. The case where it is non-corresponding is shown. In this example, the advanced BS digital broadcast, which is the broadcasting service of the movement source, can be received, but reception may be poor in the advanced broadband CS digital broadcast having a higher frequency than the advanced BS digital broadcast.

  In the CA alternative service, if the destination broadcast service is receivable, the user can move to the destination service and display the “guidance channel” for promotion. However, when the destination broadcast service is not receivable, the destination broadcast service is moved, but the “guide channel” for promotion cannot be displayed. In this case, since the “guidance channel” is not displayed, even if the user tries to return to the source broadcasting service (for example, the advanced BS digital broadcasting channel), the user unintentionally moves to the destination broadcasting service (for example, , A high-broadband CS digital broadcasting channel), there is a concern that the user may be confused. Therefore, in this embodiment, the CA alternative service is configured to display an operation button for returning to the movement source broadcast service on the screen after moving to the movement destination broadcast service.

  Hereinafter, a display screen example displayed in the CA alternative service according to the present embodiment will be described with reference to FIG. FIG. 3 is a diagram illustrating an example of a display screen displayed on the receiving device 20 in the CA alternative service according to the present embodiment. The screen indicated by reference sign G10 is an example of a screen displayed on the display unit 128 by the receiving device 20 when a non-contracted advanced BS digital broadcast pay channel (that is, a source broadcast service) is selected. The screen indicated by reference sign G10 is a screen for confirming permission of the user to move to the “guide channel” (that is, the broadcast service at the destination), and is hereinafter also referred to as “movement confirmation screen G10”. On the movement confirmation screen G10, notification information K10 for notifying that a contract is required to view this pay channel (program), and an operation button B10 (“ Yes ") is displayed.

  When the operation button B10 is pressed on the movement confirmation screen G10, the destination broadcasting service (here, the “guide channel” of the pay channel of the advanced BS digital broadcasting provided by the advanced broadband CS digital broadcasting) can be received. In this case, for example, a contract guidance screen (hereinafter also referred to as “contract guidance screen G20”) indicated by reference numeral G20 is displayed. The contract guidance screen G20 shown in the figure includes contract guidance information K20 indicating contract guidance such as a channel name and a contract fee, and an operation button B20 ("Next") for proceeding to a contract screen for input processing for a contract. Is displayed. The information indicating the contract content includes the channel name of the pay channel of the advanced BS digital broadcasting (here, “baseball channel”), the screen for performing the contract procedure, information indicating the viewing fee, and the like. In addition, the contract guide screen G20 shown in the figure further displays an operation button B21 ("Return") for switching (returning) the channel to the source broadcast service (that is, the non-contracted advanced BS digital broadcast pay channel). Has been.

  On the other hand, when the destination broadcast service (here, the “guide channel” of the pay channel of the advanced BS digital broadcast provided by the advanced broadband CS digital broadcast) cannot be received, the movement confirmation screen G10 When the operation button B10 is pressed, for example, a reception failure screen (hereinafter, also referred to as “reception failure screen G30”) indicated by reference numeral B30 is displayed. The reception failure screen G30 shown in the figure includes warning information K30 including error information indicating that reception is not possible, help information indicating an example of a solution (here, “check antenna connection”), An operation button B21 ("Return") for switching (returning) the channel to the broadcast service (that is, the paid channel for the advanced BS digital broadcast that has not been contracted) is displayed.

  As described above, in the present embodiment, in the CA alternative service, the operation button B21 for returning to the movement source broadcast service is displayed when moving to the movement destination broadcast service. Even if the previous broadcast service is poorly received, the user can easily return to the original broadcast service, so that the user can be prevented from being confused. In the above description, the CA alternative service according to the present embodiment has been described by taking the case of advanced broadband broadcasting as an example. However, the CA alternative service according to the present embodiment is not limited to the case of advanced broadband broadcasting. The CA alternative service according to the present embodiment may be applied to (BS / CS digital broadcasting).

  In the example illustrated in FIG. 3, an example in which the operation button B21 for switching (returning) the channel to the source broadcast service is also displayed on the contract guidance screen G20 is not limited to this. . The operation button B21 is displayed on the poor reception screen G30 and may not be displayed on the contract guidance screen G20.

Hereinafter, the configuration of the digital broadcast system 1 according to the present embodiment will be described in detail.
(Configuration of transmitting apparatus 10)
First, with reference to FIG. 4, the structure of the transmission apparatus 10 with which the digital broadcasting system 1 is provided is demonstrated. FIG. 4 is a block diagram illustrating an example of the configuration of the transmission device 10 according to the present embodiment. The illustrated transmission apparatus 10 includes a program data generation unit 111, a configuration data generation unit 112, a multiplexing unit 114, and a transmission unit 115.

  The program data generation unit 111 acquires program data including video data indicating video configuring a broadcast program and audio data indicating sound configuring the broadcast program. For example, the program data generation unit 111 converts the input program data into a predetermined transmission method, for example, MPEG-2 TS (Transport Stream), and outputs the converted program data to the scramble unit 113. The TS is composed of a plurality of TS packets, and includes PES (Packetized Elementary Stream) storing video content and audio content, PSI (Program Specific Information), and SI information.

  The configuration data generation unit 112 acquires configuration information related to a broadcast service or a broadcast program transmitted by the transmission device 10, generates configuration data in a predetermined format from the acquired configuration information, and scrambles the generated configuration data. Output to. The configuration data in a predetermined format is included in, for example, PSI or SI. PSI includes PAT (Program Association Table), PMT (Program Map Table), CAT (Conditional Access Time), and the like. The SI includes a service description table (SDT), an event information table (EID), a time date table (TDT), a time offset table (TOT), and the like. For example, the configuration data includes information related to scrambled broadcasting, a link descriptor for identifying the presence or absence of a CA alternative service, and the like.

  For example, as the information related to the scrambled broadcast, the configuration data generation unit 112 includes ECM (Entitlement Control Message), which is common information including information related to the program and information related to the control on the receiving side, and the personal contract information and ECM encryption An EMM (Entitlement Management Message) that is individual information including information for solving the problem is generated. The ECM includes common information such as a work key and a scramble key, and the EMM includes individual information such as a card ID and message information displayed on the screen.

  Further, the configuration data generation unit 112 generates a link descriptor for identifying the presence / absence of a CA alternative service. FIG. 5 is a diagram illustrating an example of a link descriptor. The illustrated link descriptor (Linkage descriptor) includes an identification tag (descriptor_tag) for identifying the descriptor, a descriptor length (descriptor_length) indicating the byte length of the data portion of the descriptor, a transport stream identification (transport_stream_id), and the original Network identification (original_network_id), service identification (service_id), link type (linkage_type), and private data (private_data_byte) are included. The transport stream identification identifies a transport stream including the indicated information service. The original network identification serves as a label that defines the network identification of the original distribution system of the indicated information service. Service identification uniquely identifies an information service in the transport stream. The link type indicates the type of link in this link descriptor. For example, in the case of “linkage_type = 0x03”, it indicates a CA alternative service. Private data is individually defined for each link type. In the CA alternative service, a message displayed on the movement confirmation screen G10 (see FIG. 3) or the like is stored. In the CA alternative service, the transport stream identification, the original network identification, and the service identification described above indicate channel information of the broadcast service at the movement destination.

  Returning to FIG. 4, the scramble unit 113 assigns a scramble key to the program data including the video data and the audio data output from the program data generation unit 111 and the configuration data output from the configuration data generation unit 112. To scramble. Here, the scramble unit 113 executes the scramble process in the case of a scrambled broadcast program, and multiplexes the program data and the configuration data without executing the scramble process in the case of a non-scrambled broadcast program. Output to.

  The multiplexing unit 114 multiplexes the program data and the configuration data output from the scramble unit 113, and generates multiplexed data in a predetermined format (for example, TLV (Type Length Value) format). The multiplexing unit 114 outputs the generated multiplexed data to the transmission unit 115.

  The transmission unit 115 transmits the multiplexed data output from the multiplexing unit 114 to the reception device 20 via the broadcast satellite 15 that is a broadcast transmission path. Here, the transmitter 115 modulates multiplexed data, which is a baseband signal, by a predetermined modulation method, and radiates a radio wave (broadcast wave) in a channel band corresponding to the carrier frequency through the antenna 11.

(Configuration of receiving device 20)
Next, with reference to FIG. 6, the structure of the receiver 20 with which the digital broadcasting system 1 is provided is demonstrated. FIG. 6 is a block diagram illustrating an example of a configuration of the receiving device 20 according to the present embodiment. The reception device 20 includes a reception unit 211, a separation unit 212, a descrambling unit 213, an audio decoding unit 214, an audio output unit 215, a video decoding unit 216, a screen synthesis unit 217, a display unit 218, an operation input unit 221, and a card IF unit. 222, a storage unit 225, and a control unit 230.

  The receiving unit 211 receives the broadcast wave transmitted from the transmission device 10 via the broadcast satellite 15. The reception unit 211 receives a reception signal of a channel band corresponding to the broadcast channel selected based on the operation input input to the operation input unit 221, and receives a baseband signal by a demodulation method corresponding to the modulation method of the transmission device 10. Is demodulated into multiplexed data. Then, the reception unit 211 outputs the demodulated multiplexed data to the separation unit 212. The receiving unit 211 performs error correction processing after demodulation or at the time of demodulation.

  The separation unit 220 separates the multiplexed data output from the reception unit 211 into audio data, video data, and configuration data. Further, the separation unit 220 outputs the separated audio data, video data, and configuration data to the descrambling unit 213.

The descrambling unit 213 executes descrambling processing on audio data, video data, and configuration data of the scrambled broadcast. For example, the descrambling unit 213 generates a work key by descrambling the scrambled EMM (individual information) using the card ID of the IC card 25 attached to the receiving device 20. The descrambling unit 213 then descrambles the ECM (common information) scrambled using the generated work key to extract a scramble key, and uses the extracted scramble key to extract audio data, video data, and the like. Descramble the configuration data. The descrambling unit 213 outputs the descrambled audio data, video data, and configuration data to the audio decoding unit 214, the video decoding unit 216, and the control unit 230, respectively.
The descrambling unit 213 does not perform descrambling processing on the audio data, video data, and configuration data of the non-scrambled broadcast, and each of the audio decoding unit 214, the video decoding unit 216, and the control unit 230 Output.

Audio data is input from the descrambling unit 213 to the audio decoding unit 214. The input audio data is data encoded by a predetermined audio encoding method (for example, MPEG-2 audio). The audio decoding unit 214 decodes input audio data using a decoding method corresponding to the encoding method used for encoding, and generates decoded audio data. The decoded audio data is data indicating the audio level at each time. The audio decoding unit 214 outputs the decoded audio data to the audio output unit 215.
The audio output unit 215 outputs audio based on the audio data input from the audio decoding unit 214. The audio output unit 215 includes, for example, a speaker.

  Video data is input from the descrambling unit 213 to the video decoding unit 216. The input video data is data encoded by a predetermined video encoding method (for example, MPEG2 video). The video decoding unit 216 decodes input video data using a decoding method corresponding to the encoding method used for encoding, and generates decoded video data. The decoded video data is data indicating signal values forming a video (frame image) at each time. The video decoding unit 216 outputs the decoded video data to the screen synthesis unit 217.

  The screen composition unit 217 receives video data from the video decoding unit 216 and screen data (screen data including messages and operation buttons) from the control unit 230. The screen combining unit 217 generates display data by combining the video indicated by the input video data with the screen indicated by the screen data. The screen synthesis unit 217 outputs the display data obtained by the synthesis to the display unit 218.

  The display unit 218 receives display data from the screen composition unit 217. The display unit 218 displays a display screen based on the input display data. For example, the display unit 218 displays a display screen such as a display screen on which a video of a program of a non-scrambled broadcast channel is displayed or a movement confirmation screen G10 displayed when an unsigned scrambled broadcast channel is selected. . The display unit 218 includes a display, for example.

  The operation input unit 221 acquires an operation signal in response to a user operation input, and outputs the acquired operation signal to the control unit 230. The operation input unit 221 may include a dedicated member such as a switch, a knob, an infrared light receiving unit that receives an infrared signal from a remote controller, or the like as a member for receiving an operation input, or a touch sensor. A general-purpose member such as the above may be included. The operation input unit 221 may include an input / output interface for remote input.

  The card IF unit 222 includes a card slot in which the IC card 25 is mounted, and communicates with the mounted IC card 25. The IC card 25 is a card that is attached to the receiving device 20 and communicates with the receiving device 20, and is a card on which an IC chip storing a unique card ID is mounted.

  The storage unit 225 stores various data. The various data is, for example, screen data to be displayed on the display unit 218. The storage unit 225 includes a storage medium, for example, an HDD (Hard-disk Drive), a flash memory, a ROM (Read-only Memory), a RAM (Random Access Memory), or a combination thereof.

(Configuration of control unit 230)
Next, the configuration of the control unit 230 will be described. The control unit 230 includes a determination unit 231, a switching control unit 232, a screen control unit 233, and a channel selection unit 234.

  The determination unit 231 determines the type of the selected broadcast service (for example, whether it is an advanced broadband broadcast) and the broadcast form of the broadcast program (for example, whether it is a scrambled broadcast). Further, when a scrambled broadcast channel or broadcast program is selected, the determination unit 231 determines whether or not the broadcast channel or broadcast program has been contracted. If the contract is not made, the determination unit 231 determines whether or not a CA alternative service is provided.

  The determination unit 231 determines whether each broadcast service is receivable. For example, the determination unit 231 determines whether or not a broadcast service can be received at any time at a predetermined timing. Here, the predetermined timing is, for example, a preset timing such as once or a plurality of times a day, or a timing according to the use of the CA alternative service. The determination unit 231 determines whether or not each broadcast service is receivable by performing a channel selection search in the background at any time of the predetermined timing. Then, the determination unit 231 outputs the determination result to the switching control unit 232 and the screen control unit 233.

  The switching control unit 232 switches broadcast services based on the determination result of the determination unit 231. For example, the switching control unit 232 generates channel selection information indicating the destination broadcast service based on the determination result of the determination unit 231, and outputs the generated channel selection information to the channel selection unit 234.

  The screen control unit 233 generates screen data to be displayed on the display unit 218. Here, the screen data is not video data included in the program data, but includes messages and operation buttons such as a movement confirmation screen G10, a contract guidance screen G20, and a poor reception screen G30 (see FIG. 3). Display screen data. The screen control unit 233 outputs the generated screen data to the screen synthesis unit 217.

  The channel selection unit 234 indicates a broadcasting system, channel, program, etc. selected by the user based on an operation signal (for example, an operation signal indicating channel selection by remote control operation) input from the operation input unit 270 to the control unit 230. Generate tuning instruction information. Further, the channel selection unit 234 acquires the channel selection information output from the switching control unit 232, and generates channel selection instruction information indicating a broadcasting system, a channel, a program, and the like based on the acquired channel selection information. Then, the channel selection unit 234 outputs the generated channel selection instruction information to the reception unit 211. When receiving the channel selection instruction information output from the channel selection unit 234, the reception unit 211 receives a reception signal in a channel band corresponding to the channel selection instruction information.

(Operation of CA alternative service processing)
Next, with reference to FIG. 7 and FIG. 10, the operation of the CA alternative service process in the receiving device 20 according to the present embodiment will be described. In the following, an example of performing CA substitution service by guidance in the BS channel when not advanced broadband broadcasting, and performing CA substitution service by guidance from the BS channel to CS channel in the case of advanced broadband broadcasting. explain.

FIG. 7 is a flowchart showing an example of CA alternative service processing according to the present embodiment.
(Step S110) In the receiving device 20, the user selects a BS channel (broadcast service) by remote control operation or the like. The control unit 230 transmits channel selection instruction information indicating the broadcast service selected by the user to the reception unit 211. The receiving unit 211 receives a broadcast wave in a channel band corresponding to the channel selection instruction information, demodulates the received multiplexed data, and outputs the demodulated data to the separating unit 220. The separation unit 220 separates the multiplexed data output from the reception unit 211 into audio data, video data, and configuration data.

  (Step S112) The control unit 230 (determination unit 231) determines the contract status or the like of the received broadcast service based on the ECM included in the configuration data separated by the separation unit 220. For example, the control unit 230 determines that the received broadcast service is scrambled broadcast, and the contract status is based on the return code from the IC card 25 in response to the ECM reception command. If the control unit 230 determines that the contract status of the received broadcast service is not contracted, the control unit 230 advances the process to step S114.

  (Step S130) On the other hand, in step S112, the control unit 230 determines that the contract status of the received broadcast service is contracted, or determines that the received broadcast service is non-scrambled broadcast. If so, the reception process is performed. For example, the control unit 230 causes the descrambling unit 213 to execute descrambling processing when it is determined that the received broadcast service is scrambled broadcasting and has been contracted. In addition, when the control unit 230 determines that the received broadcast service is non-scrambled broadcast, the control unit 230 does not cause the descrambling unit 213 to execute the descrambling process. Thereby, the receiving device 20 outputs video data and audio data of the scrambled broadcast service in the case of scrambled broadcasting, and in the case of non-scrambled broadcasting, it is not necessary to release the scrambled video data and audio. Output data. That is, the video of the selected channel (broadcast service) is displayed on the display unit 218 of the receiving device 20. Thereby, the user can view the selected channel (broadcast service).

  (Step S132) In step S112, the control unit 230 determines that the contract status of the received broadcast service is not contracted or contracted, and that the received broadcast service is not non-scrambled broadcast. (Determined as other). The case of determining other is, for example, a state in which the selected channel cannot be received. In this case, the control unit 230 performs a reception disable process. For example, the control unit 230 (screen control unit 233) generates an error screen that notifies information indicating that reception is not possible. FIG. 8 is a diagram illustrating an example of an error screen. In the illustrated error screen G31, for example, warning information K30 including error information indicating that reception is not possible and help information indicating an example of a solution (here, “check antenna connection”) is displayed. Yes. The error screen G31 is combined with the video data by the screen combining unit 217 and displayed on the display unit 218.

  (Step S114) The control unit 230 (determination unit 231) determines whether or not the uncontracted broadcast service is an advanced broadband broadcast. For example, the control unit 230 determines based on whether or not the channel (broadcast service) selected by the user is a broadcast service for advanced broadband broadcasting. Note that the control unit 230 may determine whether the broadcast is an advanced broadband broadcast based on information (for example, network information) indicating a broadcast method of a broadcast service included in the received broadcast wave configuration data.

  If the control unit 230 determines in step S114 that the uncontracted broadcast service is an advanced broadband broadcast (YES), the control unit 230 advances the process to step S200. The process of step S200 is a CA alternative service process at the time of advanced broadband broadcasting, and will be described later with reference to FIG.

  On the other hand, if the control unit 230 determines in step S114 that the uncontracted broadcast service is not an advanced broadband broadcast (NO), the control unit 230 advances the process to step S116. The processes after step S116 are CA alternative service processes when the advanced broadband broadcasting is not performed, that is, when guidance in the BS channel or guidance in the CS channel is performed.

  (Step S116) The control unit 230 (determination unit 231) determines whether or not there is an arrangement of link descriptors in the configuration data of this uncontracted broadcast service. This link descriptor is the link descriptor described with reference to FIG. 5 and is the link descriptor of the CA alternative service (link descriptor of “linkage_type = 0x03”). When it is determined that the link descriptor is not arranged (NO), the control unit 230 executes the reception disable process in step S132. On the other hand, when it is determined that the link descriptor is arranged (YES), the control unit 230 advances the process to step S118.

  (Step S118) The control unit 230 (screen control unit 233) generates a movement confirmation screen G10 (see FIG. 3) based on message information and the like stored in the private data of the link descriptor. When message information or the like is not stored in the private data, the control unit 230 displays a movement confirmation screen based on the message information stored in the storage unit 225 (message information built in the receiving device 20). G10 may be generated. The control unit 230 displays the generated movement confirmation screen G10 on the display unit 218 via the screen synthesis unit 217. That is, on the display unit 218, a movement confirmation screen for confirming to the user that the user is moving to the “guide channel” (destination broadcasting service) (that is, confirming whether the user has an intention to make a contract). G10 is displayed.

  (Step S120) The control unit 230 (determination unit 231) determines whether the user has permitted the movement of the broadcast service. For example, the control unit 230 allows the user to move the broadcast service based on the operation signal acquired from the operation input unit 221 depending on whether or not the operation button B10 (see FIG. 3) on the movement confirmation screen G10 is pressed. It is determined whether or not. If the control unit 230 determines that the user has refused to move the broadcast service, the control unit 230 proceeds to the process of step S132 and executes a reception disable process. For example, the control unit 230 determines that the user has refused to move the broadcast service when a predetermined time or more (for example, 5 minutes or more) has passed without the operation button B10 being pressed, and the operation button B10 is hidden. Also good. In addition to the operation button B10, an operation button (for example, “No”) for rejecting the movement of the broadcast service may be displayed on the movement confirmation screen G10. In this case, the control unit 230 determines that the user has refused to move the broadcast service when the operation button for refusing is pressed.

  (Step S122) When the control unit 230 determines in step S120 that the user has permitted the movement of the broadcast service (that is, when the operation button B10 is pressed), the control unit 230 stops the output of the movement confirmation screen G10, and the link description Switch to the destination broadcast service specified by the child.

  Specifically, when the determination unit 231 determines that the user has permitted the movement of the broadcast service, the switching control unit 232 determines the destination specified by the link descriptor based on the determination result of the determination unit 231. The channel selection information indicating the broadcast service is generated, and the generated channel selection information is output to the channel selection unit 234. The channel selection unit 234 generates channel selection instruction information based on the channel selection information output from the switching control unit 232 and outputs the channel selection instruction information to the reception unit 211. As a result, the broadcast service received by the reception unit 211 is switched to the destination broadcast service. Here, since the source broadcast service is the BS channel, the destination broadcast service (that is, the “guide channel”) is also a BS channel and non-scrambled broadcast. As a result, the destination broadcast service (that is, the “guide channel”) is displayed on the display unit 218. FIG. 9 is a diagram showing an example of a contract guidance screen displayed at the “guidance channel” at this time. In the contract guide screen G21 shown in the figure, contract guide information K20 indicating contract guide such as a channel name and a contract fee, and an operation button B20 ("Next") for proceeding to a contract input screen for input processing for a contract. Is displayed. That is, the contract guide screen G21 is the same as the contract guide screen G20 shown in FIG. 3 except that the operation button B21 is not displayed.

  (Step S124) When the user intends to make a contract, the user inputs a contract operation in the “guide channel”. The control unit 230 (determination unit 231) determines whether or not the user has a contract intention based on the operation signal acquired from the operation input unit 221.

  (Step S126) When it is determined in Step 124 that the user has an intention to make a contract (YES), the control unit 230 executes a contract process. As a result, viewing of the source broadcast service (that is, the broadcast service selected by the user in step S110) becomes possible.

  (Step S128) On the other hand, when it is determined in Step 124 that the user does not intend to make a contract (for example, when the user further switches to another broadcasting service) (NO), the CA alternative service (For example, the broadcast service switched by the user is selected).

(Operation of CA alternative service processing during advanced broadband broadcasting)
Next, with reference to FIG. 10, the operation of the CA alternative service process at the time of advanced broadband broadcasting will be described. FIG. 10 is a flowchart showing a specific example of the CA alternative service process (the process of step S200) at the time of advanced broadband broadcasting according to the present embodiment. Here, it is assumed that the source broadcast service is a BS channel of advanced BS digital broadcasting.

  (Step S216) The control unit 230 (determination unit 231) determines whether or not the CA replacement service link descriptor is arranged in the configuration data of the non-contracted broadcast service. When it is determined that the link descriptor is not arranged (NO), the control unit 230 executes the reception disable process in step S132. On the other hand, when it is determined that there is an arrangement of the link descriptor (YES), the control unit 230 advances the process to step S218.

  (Step S218) The control unit 230 (screen control unit 233) generates a movement confirmation screen G10 (see FIG. 3) based on message information stored in the private data of the link descriptor, and generates the generated movement confirmation. The screen G10 is displayed on the display unit 218 via the screen composition unit 217.

  (Step S220) The control unit 230 (determination unit 231) determines whether or not the user has permitted the movement of the broadcast service based on whether or not the operation button B10 on the movement confirmation screen G10 has been pressed. If the control unit 230 determines that the user has refused to move the broadcast service, the control unit 230 proceeds to the process of step S132 and executes a reception disable process.

  (Step S222) When it is determined that the user has permitted the movement of the broadcast service (that is, when the operation button B10 is pressed), the control unit 230 stops the output of the movement confirmation screen G10 and is designated by the link descriptor. Switch to the destination broadcast service.

  (Step S224) The control unit 230 (screen control unit 233) generates an operation button B21 (see FIG. 3) for returning to the source broadcast service, and displays the operation button B21 on the display unit 218 via the screen composition unit 217. .

  Here, for example, it is assumed that the source broadcast service is the BS channel of advanced BS digital broadcasting, and the information indicating the destination broadcast service stored in the link descriptor is the CS channel of advanced broadband CS digital broadcast. . In this case, even if the advanced BS digital broadcast selected by the user in step S110 can be received, the advanced broadband CS digital broadcast is not necessarily received.

(Step S226) When the destination broadcast service is receivable, the destination broadcast service (that is, “guide channel”) and the operation button B21 (return button) are combined on the display unit 218. The contract guidance screen G20 (see FIG. 3) is displayed.
As a result, the user can operate the contract on the contract guide screen G20 when there is an intention to contract, and can only operate the operation button B21 when there is no intention to contract. Can return to the broadcasting service.

(Step S228) On the other hand, if the destination broadcast service is not receivable, the display unit 218 displays a reception failure screen G30 in which an error screen indicating that reception is not possible and the operation button B21 (return button) are combined. (See FIG. 3) is displayed.
Thereby, when the poor reception screen G30 is displayed, the user can return to the broadcast service of the movement source only by operating the operation button B21.

  (Step S230) In the contract guide screen G20, when the user has an intention to contract, the user inputs a contract operation in the “guide channel”. The control unit 230 (determination unit 231) determines whether or not the user has a contract intention based on the operation signal acquired from the operation input unit 221.

  (Step S232) If the control unit 230 determines in step S230 that the user has an intention to make a contract (YES), the control unit 230 stops the output of the operation button B21 (return button) and executes the contract process. As a result, viewing of the source broadcast service (that is, the broadcast service selected by the user in step S110) becomes possible.

  (Step S234) The control unit 230 (determination unit 231) determines whether or not the operation button B21 (return button) is pressed on the contract guidance screen G20 or the poor reception screen G30. The case where the operation button B21 (return button) is pressed on the contract guidance screen G20 is a case where it is not determined in step S230 that the user has an intention to contract (NO).

  (Step S236) When it is determined in step S234 that the operation button B21 (return button) is not pressed (NO), the control unit 230 receives the operation button B21 (return button) and the contract guidance screen G20 or reception. The display with the defective screen G30 is continued. On the other hand, when it is determined in step S234 that the operation button B21 (return button) is not pressed (YES), the control unit 230 stops the output of the operation button B21 (return button), and the movement source Switch (return) to broadcast service. That is, the process returns to the state of receiving the same broadcast service as the broadcast service selected by the user in the process of step S110 in FIG.

As described above, in the digital broadcasting system 1 according to the present embodiment, the receiving device 20 includes the screen control unit 233, the operation input unit 221, and the switching control unit 232. The screen control unit 233 includes a specific descriptor (for example, a link descriptor) in the broadcast wave being selected when the broadcast service of the movement source being selected (an example of the first broadcast service) is not contracted. In this case, an operator (for example, the movement shown in FIG. 3) that accepts an operation for permitting switching from the source broadcast service to the destination broadcast service (an example of the second broadcast service. For example, “guide channel”). The operation button B10) of the confirmation screen G10 is displayed on the display unit 218. The operation input unit 221 receives an operation on the operation element (for example, the operation button B10) displayed on the display unit 218. When the operation input unit 221 receives an operation on the operation element (for example, the operation button B10), the switching control unit 232 switches from the source broadcast service to the destination broadcast service.
When the switching control unit 232 switches to the destination broadcast service, the screen control unit 233 accepts at least an operation for switching to the source broadcast service (for example, the contract guidance screen G20 shown in FIG. 3 or reception). The operation button B21) of the defective screen G30 is displayed on the display unit 218.

  In this way, when the unsigned scrambled broadcast service is compatible with the CA alternative service, the receiving device 20 switches to the destination broadcast service when switching to the destination broadcast service (for example, “guide channel”). An operator for returning (for example, the operation button B10) is displayed. As a result, the receiving device 20 can control the user so that the user can easily return to the source broadcast service even when the destination broadcast service cannot be received. Therefore, the receiving apparatus 20 can control the CA alternative service so as not to confuse the user even when the guidance broadcast service cannot be received.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
Since the configurations of the transmission device 10 and the reception device 20 included in the digital broadcast system 1 according to the present embodiment are the same as those in the first embodiment, characteristic processing in the present embodiment will be described. In the present embodiment, the receiving device 20 performs control so as not to switch to the destination broadcast service when the destination broadcast service cannot be received in the CA alternative service.

  In the receiving apparatus 20 according to the present embodiment, the switching control unit 232 of the control unit 230 switches from the source broadcast service being selected to the destination broadcast service (ie, “guide channel”) in the CA alternative service. Whether or not to switch is controlled based on a determination result of whether or not the destination broadcast service determined by the determination unit 231 is receivable.

  For example, when the determination unit 231 determines that the destination broadcast service is receivable, the switching control unit 232 switches from the source broadcast service to the destination broadcast service. On the other hand, when the determination unit 231 determines that the destination broadcast service is not receivable, the switching control unit 232 does not switch from the source broadcast service to the destination broadcast service.

  In the present embodiment, when the operation input unit 221 receives an operation on the operation button B10 for permitting switching to the “guide channel” on the movement confirmation screen G10 (see FIG. 3), the determination unit 231 Then, it is determined whether or not the destination broadcast service is receivable. The operation of the CA alternative service process according to this embodiment will be described below.

The operation of the CA alternative service process according to the present embodiment is different from the CA alternative service process at the time of advanced wideband broadcasting in step S200 in the process shown in FIG. 7, and will be described with reference to FIG. .
FIG. 11 is a flowchart showing an example of CA alternative service processing during advanced broadband broadcasting according to the present embodiment. Here, as in the example of FIG. 10, it is assumed that the source broadcast service is the BS channel of advanced BS digital broadcasting.

  (Step S2100) The control unit 230 (determination unit 231) determines whether or not the CA replacement service link descriptor is arranged in the configuration data of the uncontracted broadcast service. When it is determined that the link descriptor is not arranged (NO), the control unit 230 executes the reception disable process in step S132. On the other hand, when it is determined that there is an arrangement of the link descriptor (YES), the control unit 230 advances the process to step S2102.

  (Step S2102) The control unit 230 (screen control unit 233) generates a movement confirmation screen G10 (see FIG. 3) based on the message information and the like stored in the private data of the link descriptor, and generates the generated movement confirmation. The screen G10 is displayed on the display unit 218 via the screen composition unit 217.

  (Step S2104) The control unit 230 starts a channel selection process for determining whether or not reception is possible by selecting a destination broadcast service in the background. In addition, in order to select the broadcast service of the movement destination in the background, for example, on the movement confirmation screen G10, the background is no video and there is no audio output.

  (Step S2106) The control unit 230 (determination unit 231) determines whether or not the user has permitted the movement of the broadcast service based on whether or not the operation button B10 on the movement confirmation screen G10 has been pressed. If the control unit 230 determines that the user has refused to move the broadcast service, the control unit 230 proceeds to the process of step S132 and executes a reception disable process.

  (Step S2108) Before the operation button B10 on the movement confirmation screen G10 is pressed (not input) in Step S2106, the control unit 230 can receive the broadcast service of the movement destination in the channel selection process started in Step S2104. It is determined whether or not. When it is determined that reception is possible, or when the channel selection process is not completed, the control unit 230 returns to the process of step S2106. On the other hand, when it is determined that reception is not possible, the control unit 230 advances the process to step S2114.

  (Step S2110) In Step 2106, when it is determined that the user has permitted the movement of the broadcast service during the channel selection process started in Step S2104 (that is, when the operation button B10 is pressed), the control unit 230 Then, the output of the movement confirmation screen G10 is stopped and the completion of the channel selection process is awaited. And the control part 230 will advance a process to step S2112, if a channel selection process is completed.

  (Step S2112) When it is determined that the destination broadcast service is receivable from the result of the channel selection process, control unit 230 advances the process to step S2122. The subsequent processes of steps S2122, S2124, S2126, and S2128 are the same as the processes of steps S122, S124, S126, and S128 of FIG. The process according to the intention of the user's contract is performed. On the other hand, when it is determined that the destination broadcast service is unreceivable based on the result of the channel selection process, the control unit 230 advances the process to step S2114.

  (Step S2114) When it is determined in step S2108 or step S2112 that the destination broadcast service cannot be received, the control unit 230 (screen control unit 233) cannot receive the “guide channel”. Is displayed on the display unit 218 via the screen composition unit 217. FIG. 12 is a diagram showing an example of a reception failure screen generated at this time. In the poor reception screen G40 shown in the figure, a subscription or registration is required to view this pay channel (program), and notification information K40 for notifying an inquiry destination and the “guide channel” cannot be received. Is displayed.

  As described above, in the digital broadcast system 1 according to the present embodiment, the receiving device 20 includes the determination unit 231 and the switching control unit 232. The determination unit 231 determines whether the broadcast service is receivable. Whether the switching control unit 232 switches from the broadcast service of the movement source being selected (an example of the first broadcast service) to the broadcast service of the movement destination (an example of the second broadcast service. For example, “Guide channel”). Whether or not the destination broadcast service determined by the determination unit 231 is receivable is controlled based on the determination result. Accordingly, the receiving device 20 changes from the source broadcast service (eg, BS channel) to the destination broadcast service (eg, CS channel) based on the reception status of the destination broadcast service (eg, CS channel). Can be controlled appropriately. Therefore, the receiving device 20 can perform control so as not to confuse the user even when the broadcast service of the guide destination cannot be received.

  For example, the switching control unit 232 selects a channel that is being selected when the broadcasting service being selected is not contracted and a broadcast wave being selected includes a specific descriptor (for example, a link descriptor). Controls whether to switch from the source broadcast service to the destination broadcast service. As a result, the receiving device 20 can select the CA alternative service when the broadcast service being selected is an uncontracted scrambled broadcast service (for example, BS channel) and the broadcast wave includes a link descriptor of the CA alternative service. The switching from the scrambled broadcasting service to the “guide channel” can be appropriately controlled based on the reception state of the “guide channel” (for example, the CS channel) provided by.

  As an example, the switching control unit 232 selects a specific descriptor (for example, a broadcast wave in which the broadcast service being selected is a high-broadband broadcast service and the broadcast service is not contracted and is being selected). , A link descriptor) is included, it is controlled whether or not switching is performed from the source broadcast service being selected to the destination broadcast service. As a result, the receiving device 20 is a scrambled broadcasting service (for example, an advanced BS channel) for advanced broadband broadcasting for which the selected broadcasting service is not subscribed, and the broadcast descriptor includes the link descriptor of the CA alternative service. In this case, switching from the scrambled broadcasting service to the “guide channel” can be appropriately controlled based on the reception state of the “guide channel” (for example, the advanced broadband CS channel) provided by the CA alternative service.

  Specifically, when the determination unit 231 determines that the destination broadcast service can be received, the switching control unit 232 switches from the source broadcast service to the destination broadcast service. On the other hand, when the determination unit 231 determines that the source broadcast service is not receivable, the switching control unit 232 does not switch from the source broadcast service to the destination broadcast service. Thereby, for example, when the scrambled broadcasting service being selected (for example, BS channel) is not contracted, the receiving device 20 can receive the “guide channel” (for example, CS channel) provided by the CA alternative service. It is possible to switch to the “Guide channel” only at certain times. Therefore, in this embodiment, the broadcast service is not switched when the “guide channel” cannot be received (for example, the BS is switched to the CS). Therefore, the receiving device 20 can perform control so as not to confuse the user even when the broadcast service of the guide destination cannot be received.

  The receiving device 20 further includes a screen control unit 233 and an operation input unit 221. The screen control unit 233 displays on the display unit 218 an operator (for example, the operation button B10 on the movement confirmation screen G10 shown in FIG. 3) that accepts an operation for permitting switching from the source broadcast service to the destination broadcast service. Let The operation input unit 221 receives an operation on the operation element (for example, the operation button B10) displayed on the display unit 218. When the operation input unit 221 receives an operation on the operation element (for example, the operation button B10), the determination unit 231 determines whether or not the destination broadcast service is receivable. That is, in this embodiment, the predetermined timing for confirming the reception status of the destination broadcast service is the timing according to the determination that the undesigned scrambled mobile service being selected includes a link descriptor. is there. Accordingly, the receiving device 20 confirms the reception state of the “guide channel” at the timing when the switching to the “guide channel” is permitted by the user, so that the “guide channel” is based on the current reception state. Can be reliably determined. Note that the order of the process of displaying the movement confirmation screen G10 in step S2102 of FIG. 11 and the process of starting channel selection for confirming the reception status of the broadcast service of the movement destination in step S2104 may be interchanged. It may be.

[Third embodiment]
Next, a third embodiment of the present invention will be described.
In this embodiment, the movement confirmation screen G10 (see FIG. 3) is displayed only when the destination broadcast service can be received in the CA alternative service. In the present embodiment, the movement confirmation screen G10 is not displayed when the destination broadcast service cannot be received. Therefore, as in the second embodiment, the destination broadcast service cannot be received. Will not switch to the destination broadcast service.

  For example, before displaying the movement confirmation screen G10, the receiving apparatus 20 displays an explanation screen explaining that a contract is required to view the selected channel (program), and then displays the destination screen. It is determined whether or not the broadcast service can be received. FIG. 13 is a diagram showing an example of an explanation screen displayed at this time. On the illustrated explanation screen G50, for example, explanation information K50 explaining that a contract or registration is required to view this pay channel (program) and the inquiry destination is displayed.

Next, the operation of CA alternative service processing according to the present embodiment will be described. The operation of the CA alternative service process according to the present embodiment is different from the CA alternative service process at the time of advanced broadband broadcasting in step S200 in the process shown in FIG. .
FIG. 14 is a flowchart showing an example of CA alternative service processing during advanced broadband broadcasting according to the present embodiment. Here, as in the examples of FIGS. 10 and 11, it is assumed that the source broadcast service is the BS channel of advanced BS digital broadcasting.

  (Step S2200) The control unit 230 (determination unit 231) determines whether or not the CA replacement service link descriptor is arranged in the configuration data of the uncontracted broadcast service. When it is determined that the link descriptor is not arranged (NO), the control unit 230 executes the reception disable process in step S132. On the other hand, when it is determined that there is an arrangement of the link descriptor (YES), the control unit 230 advances the process to step S2202.

  (Step S2202) The control unit 230 (screen control unit 233) generates an explanation screen G50 (see FIG. 3) based on the message information and the like stored in the private data of the link descriptor, and the generated explanation screen G50. Is displayed on the display unit 218 via the screen composition unit 217.

  (Step S <b> 2204) The control unit 230 starts a channel selection process for determining whether or not reception is possible by selecting a destination broadcast service in the background. In addition, in order to select the broadcast service of the moving destination in the background, for example, on the explanation screen G50, the background is no video and there is no audio output.

  (Step S2206) The control unit 230 waits for completion of the channel selection process started in step S2204. Then, when the channel selection process is completed, control unit 230 advances the process to step S2208.

  (Step S2208) When it is determined that the destination broadcast service cannot be received as a result of the channel selection process, control unit 230 advances the process to step S2210. On the other hand, when it is determined that the destination broadcast service is receivable based on the result of the channel selection process, the control unit 230 advances the process to step S2212.

  (Step S2210) When it is determined in step S2208 that the destination broadcast service cannot be received, the control unit 230 (screen control unit 233) stops outputting the explanation screen G50, and “guide channel” A reception failure screen G40 (see FIG. 12) indicating that reception is not possible is generated. Then, the control unit 230 causes the display unit 218 to display the generated poor reception screen G40 via the screen synthesis unit 217. Thereby, the display is changed from the explanation screen G50 to the poor reception screen G40.

  (Step S2212) When it is determined in step S2208 that the destination broadcast service can be received, the control unit 230 causes the control unit 230 (screen control unit 233) to stop the output of the explanation screen G50 and move. A confirmation screen G10 (see FIG. 3) is generated. Then, the control unit 230 displays the generated movement confirmation screen G10 on the display unit 218 via the screen synthesis unit 217. Thereby, the display is changed from the explanation screen G50 to the movement confirmation screen G10.

  After the movement confirmation screen G10 is displayed in step S2212, the subsequent processes in steps S2120, S2122, S2124, S2126, and S2128 are the same as the processes in steps S120, S122, S124, S126, and S128 in FIG. The description is omitted.

  As described above, in the receiving apparatus 20 according to the present embodiment, the screen control unit 233 receives the destination broadcast service (an example of the second broadcast service. For example, “Guide channel”) by the determination unit 231. If it is determined that it is possible, an operator (for example, a movement confirmation screen shown in FIG. 3) that receives an operation for permitting switching from the source broadcast service (an example of the first broadcast service) to the destination broadcast service. The operation button B10) of G10 is displayed on the display unit 218. The operation input unit 221 receives an operation on the operation element (for example, the operation button B10) displayed on the display unit 218. Then, when the operation input unit 221 receives an operation on the operation element (for example, the operation button B10), the switching control unit 232 switches from the source broadcast service to the destination broadcast service. As described above, the receiving device 20 displays the movement confirmation screen G10 only when the “guidance channel” can be received, and accepts an operation for allowing the user to move to the “guidance channel”. Therefore, the receiving device 20 can be controlled so as not to confuse the user without displaying the movement confirmation screen G10 even though the “guide channel” cannot be received.

  In the present embodiment, the predetermined timing for confirming the reception status of the destination broadcast service includes a link descriptor in the uncontracted scrambled mobile service being selected, as in the second embodiment. It is the timing according to the determination that it is present. Note that the process of displaying the explanation screen G50 in step S2202 of FIG. 14 and the process of starting channel selection for confirming the reception status of the destination broadcast service in step S2204 may be interchanged, or simultaneously. There may be.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described. As in the third embodiment, the present embodiment is configured such that the movement confirmation screen G10 (see FIG. 3) is displayed only when the destination broadcast service can be received in the CA alternative service. In the third embodiment, it is determined whether or not the destination broadcast service can be received in the CA alternative service process. At any time, it is determined whether or not the destination broadcast service can be received.

  For example, the other predetermined timing that is not related to the timing of the CA alternative service processing is once or a plurality of times at a time determined every day. The predetermined timing may be arbitrarily determined, for example, every hour, every 3 hours, or the like when a program is switched. In addition, since the source broadcast service is not selected at another predetermined timing not related to the timing of the CA alternative service processing, the receiving apparatus 20 has a plurality of “guide channels” corresponding to each pay channel. In some cases, it is determined whether or not a plurality of destination broadcast services can be received. The receiving device 20 stores a determination result as to whether or not each determined broadcast service is receivable, and reads and uses the result when performing CA alternative service processing.

Next, the operation of CA alternative service processing according to the present embodiment will be described. The operation of the CA alternative service process according to the present embodiment is different from the CA alternative service process at the time of advanced wideband broadcasting in step S200 in the process shown in FIG. 7, and the process will be described with reference to FIG. .
FIG. 15 is a flowchart showing an example of CA alternative service processing during advanced broadband broadcasting according to the present embodiment. Here, as in the examples of FIGS. 10, 11, and 14, it is assumed that the source broadcast service is a BS channel of advanced BS digital broadcasting. Further, it is assumed that the control unit 230 stores the determination result of the reception state determined at a predetermined timing (for example, once every time determined every day) in the storage unit 225.

  (Step S2300) The control unit 230 (determination unit 231) determines whether or not the CA replacement service link descriptor is arranged in the configuration data of the uncontracted broadcast service. When it is determined that the link descriptor is not arranged (NO), the control unit 230 executes the reception disable process in step S132. On the other hand, when it is determined that there is an arrangement of the link descriptor (YES), the control unit 230 advances the process to step S2302.

(Step S2302) The control unit 230 reads the determination result of the reception state of the destination broadcast service from the storage unit 225.
(Step S2304) When it is determined in the read determination result that the destination broadcast service cannot be received, the control unit 230 advances the process to step S2306. On the other hand, when it is determined in the read determination result that the destination broadcast service is receivable, the control unit 230 advances the process to step S22308.

  (Step S2306) If it is determined in step S2304 that the destination broadcast service cannot be received, the control unit 230 (screen control unit 233) indicates that the “guide channel” cannot be received. A reception failure screen G40 (see FIG. 12) is generated, and the generated reception failure screen G40 is displayed on the display unit 218 via the screen composition unit 217.

  (Step S2308) When it is determined in step S2208 that the destination broadcast service is receivable, the control unit 230 causes the control unit 230 (screen control unit 233) to display the movement confirmation screen G10 (see FIG. 3). The generated movement confirmation screen G10 is displayed on the display unit 218 via the screen composition unit 217.

  After the movement confirmation screen G10 is displayed in step S2308, the subsequent processes in steps S2320, S2322, S2324, S2326, and S2328 are the same as the processes in steps S120, S122, S124, S126, and S128 in FIG. The description is omitted.

  As described above, in the present embodiment, the predetermined timing for confirming the reception status of the destination broadcast service is the CA alternative service processing timing, for example, once or multiple times at a time determined every day. This is another predetermined timing not related to the above. The receiving device 20 stores the reception status determination result for each broadcast service determined at another predetermined timing that is not related to the timing of the CA alternative service process, and reads and uses the result when performing the CA alternative service process. .

  For example, the screen control unit 233 can receive the destination broadcast service based on the determination result of the reception state of the destination broadcast service (an example of the second broadcast service) determined in advance by the determination unit 231. If it is determined that there is an operator (for example, a movement confirmation screen G10 shown in FIG. 3) that accepts an operation for permitting switching from the source broadcast service (an example of the first broadcast service) to the destination broadcast service. The operation button B10) is displayed on the display unit 218. That is, the receiving device 20 displays the movement confirmation screen G10 only when the “guide channel” can be received, and accepts an operation for permitting the user to move to the “guide channel”. Therefore, the receiving apparatus 20 according to the present embodiment does not display the movement confirmation screen G10 even though the “guide channel” cannot be received, as in the third embodiment, and the user is not prompted. It can be controlled without causing confusion. Further, in the present embodiment, the receiving device 20 uses the determination result of the reception state of the destination broadcast service confirmed before the CA alternative service process, and therefore determines the reception state in the CA alternative service process. It is possible to provide a user with a convenient CA replacement service without causing a processing waiting time.

[Fifth Embodiment]
Next, a fifth embodiment of the present invention will be described.
In the present embodiment, a configuration will be described in which when a destination broadcast service cannot be received, a Web page is connected and displayed via a communication network. This Web page is, for example, a Web page on which information related to a broadcast service contract that can perform the same thing as a viewing contract (or registration) performed in a “guide channel” is described. In the following description, a Web page on which information related to the broadcast service contract is described is also referred to as a “contract page”.

  FIG. 16 is a diagram illustrating an example of a link descriptor according to the present embodiment. In the illustrated link descriptor, a location indicated by reference numeral f10 is defined so that a URL (Uniform Resource Locator) can be specified for the link descriptor shown in FIG. In the link descriptor for each pay channel, the URL of the contract page in which information related to the broadcast service contract is described can be described. When the URL length (URL_length) is 0, it is interpreted that no URL is described.

FIG. 17 is a block diagram illustrating an example of a configuration of the receiving device 20A according to the present embodiment.
The receiving device 20A is different from the configuration of the receiving device 20 shown in FIG. 6 in that the receiving device 20A includes a communication unit 223 for connecting to a communication network and the configuration of the control unit 230A. In FIG. 17, configurations corresponding to the respective units in FIG. 6 are denoted with the same reference numerals, and description thereof is omitted.

  The communication unit 223 includes, for example, a plurality of Ethernet (registered trademark) ports, a plurality of USB (Universal Serial Bus) digital input / output ports, and the like, and is connected to a server device (for example, a communication network). It communicates with the Web server that provides the contract page. The communication network is an information communication network including a WAN (Wide Area Network), a LAN (Local Area Network), and the like. The WAN includes, for example, a mobile phone network, a PHS (Personal Handy-phone System) network, a PSTN (Public Switched Telephone Network), a dedicated communication line network, a VPN (Virtual Private Network), and the like.

The control unit 230A includes a determination unit 231, a switching control unit 232, a screen control unit 233, a channel selection unit 234, and a browser unit 235. FIG. 6 shows that the control unit 230A includes a browser unit 235. This is different from the configuration of the control unit 230.
The browser unit 235 has a browser function for acquiring and displaying the contract page of the link destination of the specified URL via the communication unit 223. The contract page acquired by the browser unit 235 is displayed on the display unit 218 via the screen control unit 233 and the screen composition unit 217.

When the link descriptor included in the broadcast wave of the source broadcast service includes a URL (information indicating the link destination) as information related to the contract of the source broadcast service, the switching control unit 232 moves by the determination unit 231. When it is determined that the previous broadcast service cannot be received, the browser function of the browser unit 235 is used to switch to URL information connected via the communication network. As a result, even when the destination broadcast service cannot be received and the “guide channel” is not displayed, the user can make a contract from the contract page.
When the determination unit 231 determines that the destination broadcast service can be received, the switching control unit 232 switches to the destination broadcast service via the channel selection unit 234.

  Next, the operation of CA alternative service processing according to the present embodiment will be described. In the present embodiment, the contract page display processing for displaying the contract page when the destination broadcast service cannot be received can be applied to each of the second to fourth embodiments. Hereinafter, with reference to FIG. 18 to FIG. 20, application examples of the CA alternative service processes of the second to fourth embodiments will be described. In FIG. 18 to FIG. 20, illustration is omitted only for the application portion.

  FIG. 18 is a flowchart illustrating an example in which the contract page display process is applied to the CA alternative service process according to the second embodiment. This figure shows that the contract page display process (step S2500) according to the present embodiment is applied instead of the process of step S2114 of FIG. 11 (process of displaying the poor reception screen G40).

  FIG. 19 is a flowchart illustrating an example in which the contract page display process is applied to the CA alternative service process according to the third embodiment. In this figure, the contract page display process (step S2500) according to the present embodiment is applied instead of the process of step S2210 of FIG. 14 (process of displaying the poor reception screen G40).

  FIG. 20 is a flowchart illustrating an example in which the contract page display process is applied to the CA alternative service process according to the fourth embodiment. In this figure, the contract page display process (step S2500) according to the present embodiment is applied instead of the process of step S2306 (process for displaying the poor reception screen G40) in FIG.

Next, with reference to FIG. 21, the operation of the contract page display process according to the present embodiment will be described.
FIG. 21 is a flowchart illustrating an example of a contract page display process according to the present embodiment.

  (Step S2502) The control unit 230 (determination unit 231) determines whether or not the URL is described in the link descriptor of the CA alternative service in the configuration data of the uncontracted broadcast service. When it is determined that the URL is not described in the link descriptor (NO), the control unit 230 advances the process to step S2508. On the other hand, when it is determined that the URL is described in the link descriptor (YES), the control unit 230 advances the process to step S2504.

  (Step S2504) The control unit 230 checks in the background whether or not the URL contract page can be displayed. Specifically, the control unit 230 confirms whether or not the URL contract page can be displayed by confirming whether or not the URL contract page can be connected via the communication unit 223.

  (Step S2506) The control unit 230 determines whether or not the URL contract page can be displayed based on the confirmation result in step S2504. If it is determined that the URL contract page cannot be displayed, the control unit 230 advances the process to step S2508.

  (Step S2508) If it is determined in step S2502 that the URL is not described in the link descriptor, or if it is determined in step S2506 that the URL contract page cannot be displayed, the control unit 230 (screen control unit 233) generates a reception failure screen G40 (see FIG. 12) indicating that the “guide channel” cannot be received, and displays the generated reception failure screen G40 on the display unit 218 via the screen composition unit 217. Let

  (Step S2510) When it is determined in step S2506 that the URL contract page can be displayed, the control unit 230 (screen control unit 233) asks the user whether to permit the URL contract page display. A display confirmation screen for confirmation is generated, and the generated display confirmation screen is displayed on the display unit 218 via the screen composition unit 217. FIG. 22 is a diagram showing an example of a display confirmation screen displayed at this time. On the display confirmation screen G60 shown in the figure, notification information K60 for notifying that a contract is required to view this pay channel (program), and an operation button B60 for permitting switching to the contract page ("Yes" )) Is displayed. That is, the display unit 218 displays a display confirmation screen G60 for confirming with the user that the contract page is displayed (that is, confirming whether the user has an intention to contract).

  (Step S2512) The control unit 230 (determination unit 231) determines whether or not the user has permitted display of the contract page. For example, the control unit 230 determines whether or not the user has permitted the display of the contract page based on whether or not the operation button B60 on the display confirmation screen G60 has been pressed based on the operation signal acquired from the operation input unit 221. To do. If the control unit 230 determines that the user has refused to display the contract page, the control unit 230 proceeds to the process of step S132 and executes a reception disable process. For example, the control unit 230 determines that the user has refused to display the contract page when a predetermined time or more (for example, 5 minutes or more) has passed without the operation button B60 being pressed, and the operation button B60 is hidden. Also good. In addition to the operation button B60, an operation button (for example, “No”) for rejecting the display of the contract page may be displayed on the display confirmation screen G60. In this case, the control unit 230 determines that the user has refused to display the contract page when the operation button for refusing is pressed.

  (Step S2514) When the control unit 230 determines in step S2512 that the user has permitted the display of the contract page (that is, when the operation button B60 is pressed), the control unit 230 stops the output of the display confirmation screen G60, and the link description. The contract page of the URL specified by the child is displayed using the browser function. FIG. 23 is a diagram illustrating an example of a contract page screen on which a contract page is displayed. The contract page screen G70 shown in the figure has contract guide information K70 indicating contract guide such as channel name and contract fee, and an operation button B70 ("Next") for proceeding to a contract input page for input processing for contract. And are displayed.

  As described above, in the present embodiment, a link destination (for example, a contract page) in which the broadcast wave of the source broadcast service (an example of the first broadcast service) includes information related to the contract of the source broadcast service. (For example, the URL of the contract page) is included. For example, the link descriptor included in the broadcast wave of the source broadcast service includes the URL of the contract page including information related to the contract of the source broadcast service. In this case, when the determination unit 231 determines that the destination broadcast service is not receivable, the switching control unit 232 switches to link destination information (for example, a contract page) connected via the communication network.

  As a result, the receiving apparatus 20 is a scrambled broadcasting service (for example, BS channel) in which the selected broadcasting service is a non-contracted broadcasting service in the CA alternative service, and the destination broadcasting service “guide channel” (for example, CS channel) If the channel is not received, a contract page connected via the communication network can be displayed instead of the “guide channel”. Therefore, even when the destination broadcast service “guidance channel” cannot be received, the receiving device 20 informs the user that the source broadcast service is a channel that requires a contract, the contract method, and the like. You can be notified. In addition, the receiving device 20 can make it easy for the user to make a contract from a display screen (contract page) that displays the notification content.

  The first to third embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and the design does not depart from the gist of the present invention. Etc. are also included. For example, the functions and configurations described in the above first to fifth embodiments can be arbitrarily combined.

  In the above embodiment, the example in which the receiving device 20 is a television receiver (television) including the display unit 218 has been described. However, the receiving device 20 is a DVD (DV) having a function of receiving broadcast waves. A configuration in which the display unit 218 is not provided, such as an optical disc recorder such as a recorder or a BD (Blu-ray disc) recorder, an HDD (hard disc) recorder, or a set top box, may be used. That is, the display unit 218 may be configured as an external display device connected to the receiving device 20. The receiving device 20 may be a personal computer having a function of receiving broadcast waves.

  In the above-described embodiment, a case where a media transport method based on MPEG-2 TS (Transport Stream) is used as a transmission method for transmitting various data is exemplified. However, other transmission methods, for example, MMT, are used. (MPEG Media Transport) may be used. In addition, a data format, an encryption method, and an encoding method related to transmission may be a format or a method defined by the transmission method.

  In addition, you may make it implement | achieve a part or all function of the receiver 20 (20A) in embodiment mentioned above with a computer. In that case, a program for realizing the above-described function is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed to realize the above-described function. Also good. Here, the “computer system” is a computer system built in the terminal device, and includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” is a medium that dynamically holds a program for a short time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line, In this case, a volatile memory inside a computer system that serves as a server or a client may be included that holds a program for a certain period of time. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  Further, part or all of the receiving device 20 (20A) in the above-described embodiment may be realized as an integrated circuit such as an LSI (Large Scale Integration). Each functional block of the processing unit 100 (100A) may be individually made into a processor, or a part or all of them may be integrated into a processor. Further, the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. In addition, when an integrated circuit technology that replaces LSI appears due to the advancement of semiconductor technology, an integrated circuit based on the technology may be used.

  1 Digital Broadcasting System, 10 Transmitter, 11 Antenna, 15 Broadcast Satellite, 20, 20A Receiver, 25 IC Card, 30 Broadcast Equipment, 31 Antenna, 32 Booster, 33 Distributor, 34 Cable, 35 Outlet, 111 Program Data Generation 112, configuration data generation unit, 114 multiplexing unit, 115 transmission unit, 211 reception unit, 212 separation unit, 213 descrambling unit, 214 audio decoding unit, 215 audio output unit, 216 video decoding unit, 217 screen synthesis unit, 218 display unit, 221 operation input unit, 222 card IF unit, 223 communication unit, 225 storage unit, 230, 230A control unit, 231 determination unit, 232 switching control unit, 233 screen control unit, 234 channel selection unit, 235 browser unit

Claims (12)

A determination unit for determining whether the broadcast service is receivable;
Whether to switch from the first broadcasting service being selected to the second broadcasting service is controlled based on the determination result of whether the second broadcasting service determined by the determination unit is receivable. A switching control unit,
A receiving device. The switching control unit
When the first broadcast service being selected is not contracted and a specific descriptor is included in the broadcast wave being selected, the first broadcast service being selected is changed to the second broadcast service. Control whether to switch,
The receiving device according to claim 1. The switching control unit
When the first broadcast service being selected is a broadcast service for advanced broadband satellite digital broadcasting, the broadcast service is not contracted, and a specific descriptor is included in the broadcast wave being selected. Controlling whether to switch from the first broadcast service to the second broadcast service,
The receiving device according to claim 1. The switching control unit
When the determination unit determines that the second broadcast service is receivable, the first broadcast service is switched to the second broadcast service, and the determination unit can receive the second broadcast service. If it is determined that it is not, switching from the first broadcast service to the second broadcast service is not performed.
The receiving device according to any one of claims 1 to 3. When the determination unit determines that the second broadcast service is receivable, an operation element that receives an operation for permitting switching from the first broadcast service to the second broadcast service is displayed on the display unit. A screen control unit
An operation input unit that receives an operation on the operation element displayed on the display unit;
With
The switching control unit
When the operation input unit accepts an operation on the operation element, the first broadcast service is switched to the second broadcast service;
The receiving device according to any one of claims 1 to 4. A screen control unit that causes a display unit to display an operation element that accepts an operation of permitting switching from the first broadcast service to the second broadcast service;
An operation input unit that receives an operation on the operation element displayed on the display unit;
With
The determination unit
When the operation input unit receives an operation on the operation element, it is determined whether or not the second broadcast service is receivable.
The receiving device according to any one of claims 1 to 4. When the broadcast wave of the first broadcast service includes information indicating a link destination including information related to the contract of the first broadcast service,
The switching control unit
When the determination unit determines that the second broadcast service is not receivable, the information is switched to the link destination information connected via a communication network.
The receiving device according to any one of claims 1 to 6. Operation for permitting switching from the first broadcast service to the second broadcast service when the first broadcast service being selected is not contracted and the broadcast wave being selected includes a specific descriptor. A screen controller that displays on the display unit an operator for receiving
An operation input unit that receives an operation on the operation element displayed on the display unit;
A switching control unit for switching from the first broadcast service to the second broadcast service when the operation input unit receives an operation on the operator;
With
The screen control unit
When the switching control unit is switched to the second broadcasting service, at least an operation element that receives an operation to switch to the first broadcasting service is displayed on the display unit.
Receiver device. A control method in a receiving device,
A determination process in which the determination unit determines whether the broadcast service is receivable;
Determining whether or not the second broadcast service determined by the determination unit is receivable whether or not the switching control unit switches from the first broadcast service being selected to the second broadcast service A switching control process to control based on the results;
Control method. A control method in a receiving device,
When the first broadcast service being selected is not contracted and the broadcast wave being selected includes a specific descriptor, the screen control unit switches from the first broadcast service to the second broadcast service. A screen control process for displaying on the display unit an operator that accepts an operation that permits switching;
An operation input process in which an operation input unit receives an operation on the operation element displayed on the display unit;
A switching control process for switching from the first broadcast service to the second broadcast service when the operation input unit accepts an operation on the operator;
When the screen control unit is switched to the second broadcast service by the switching control unit, a screen control process for causing the display unit to display an operator that accepts at least an operation to switch to the first broadcast service;
Control method. On the computer,
A determination procedure for determining whether the broadcast service is receivable;
Whether to switch from the first broadcasting service being selected to the second broadcasting service is controlled based on the determination result of whether the second broadcasting service determined by the determination procedure is receivable. Switching control procedure to
A program for running On the computer,
Operation for permitting switching from the first broadcast service to the second broadcast service when the first broadcast service being selected is not contracted and the broadcast wave being selected includes a specific descriptor. A screen control procedure for displaying on the display unit an operator for receiving
An operation input procedure for accepting an operation on the operator displayed on the display unit;
A switching control procedure for switching from the first broadcast service to the second broadcast service when an operation on the operator is accepted in the operation input procedure;
A screen control procedure for displaying, on the display unit, an operator for accepting an operation for switching to at least the first broadcasting service when the switching control procedure is switched to the second broadcasting service;
A program for running

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