JP5615482B2 - Digital broadcast receiving apparatus, reception control method, and digital broadcast transmitting apparatus - Google Patents

Description

  The present invention relates to a digital broadcast signal receiving apparatus / broadcasting apparatus and a reception control method / broadcasting method in digital television broadcasting and digital audio broadcasting.

  Digital terrestrial television broadcasting operated in Japan is called ISDB-T (Integrated Services Digital Broadcasting for Terrestrial) system, and employs OFDM (Orthogonal Frequency Division Multiplexing) modulation system. This ISDB-T system divides the transmission band of one channel into 13 segments, and 1 segment (central segment number 0) is used for mobile terminals such as mobile phones and PDAs (Personal Digital Assistants). To terrestrial digital broadcasting, so-called one-segment broadcasting (one-segment broadcasting).

  As a broadcasting apparatus adopting the ISDB-T system, recently, for example, digital broadcasting waves of a plurality of broadcasting stations are received, each 1-segment broadcasting is extracted, they are connected, and the broadcasting station channel is There has been proposed a broadcasting apparatus that retransmits data on a predetermined channel different from the above. In addition to the 1-segment broadcasting extracted from the digital broadcasting wave of the broadcasting station, a broadcasting apparatus has also been proposed in which unique contents are connected and transmitted by limiting the area (area) using a predetermined channel. The region here includes, for example, an underground mall, a subway, a store, and the like, and the unique content refers to, for example, introduction of a new product or a campaign in the store (for these conventional technologies, Patent Documents 1 to 3).

JP 2004-260558 A JP 2005-341195 A JP 2006-279376 A

  As in the above patent document, in a limited area, each segment of a plurality of channels is configured by 1-segment broadcasting, and when the broadcast area changes when the area-specific content is added and broadcast on a predetermined channel, There is a high possibility that the original content and the segment arrangement will change. However, information regarding the unique content is not prepared in the user receiving terminal. Accordingly, the user accesses the website of the broadcasting station of the predetermined channel and acquires the segment arrangement information of the service, or scans the segment of the channel and grasps the segment arrangement of the service. There is a need. However, in order to obtain the service segment arrangement information from the website of the broadcasting station, it is necessary to access the website of the broadcasting station for each acquisition. The In other words, even if a user moves to an area where a completely unique service is broadcast, a technology for notifying the user of information regarding the content unique to the area and its existence without incurring trouble and communication charges has not been developed.

  Therefore, an object of the present invention is to provide a unique service of a broadcasting apparatus that broadcasts locally in a limited area without needless processing such as access to a website of a broadcasting station, channel scanning and segment scanning, and communication costs. An object is to provide a technique (broadcast / reception control method and broadcast receiving apparatus) capable of notifying the user of the existence of (unique content, original broadcast).

In order to solve the above-described problems, a digital broadcast receiving apparatus according to the present invention having a receiving unit for receiving wide-area and local digital broadcasting streams and a display unit is
An extraction unit that extracts a packet having a predetermined packet identifier from the stream received by the reception unit;
When the acquisition of the local digital broadcast data broadcasting module (control block) is completed based on the packet extracted by the extraction unit, the display unit is displayed to display that the local digital broadcast is received. A control unit to control;
It is characterized by comprising.

The digital broadcast receiving apparatus according to one embodiment of the present invention includes:
When the acquisition of the local digital broadcast data broadcast startup module (module # id = 0x0000) is completed , the control unit displays that the local digital broadcast data broadcast is being received. Controlling the display unit;
It is characterized by that.

In addition, a digital broadcast receiving apparatus according to another embodiment of the present invention includes:
The control unit completes the acquisition of the local digital broadcast data broadcast module from the packet extracted by the extraction unit until the acquisition of the local digital broadcast data broadcast startup module is completed. However, the display unit is (suppressed) so as not to display that the local digital broadcast is being received.
It is characterized by that.

A digital broadcast receiving apparatus according to a further embodiment of the present invention provides:
The extraction unit further extracts a packet having a packet identifier corresponding to a data broadcast content of a wide-area digital broadcast from the digital broadcast stream received by the reception unit,
The control unit completes acquisition of the wide-area digital broadcast data broadcast startup module and controls the display unit to display content corresponding to the wide-area digital broadcast data broadcast startup module. Controls the display unit not to display that the local digital broadcast is received even when acquisition of the data broadcast module for the local digital broadcast is completed ,
It is characterized by that.
(Note that the packet identifier corresponding to the data broadcasting content of the wide area digital broadcasting is obtained from the PMT (Program Map Table).)

  As described above, the solution of the present invention has been described as an apparatus. However, the present invention can be realized as a method, a program, and a storage medium storing the program, which are substantially equivalent thereto, and the scope of the present invention. It should be understood that these are also included.

For example, a reception control method for wide area and local digital broadcast streams according to another embodiment, in which the present invention is realized as a method,
Receiving the wide-area and local digital broadcast streams;
Extracting a packet having a predetermined packet identifier from the received stream;
When acquisition of the module for data broadcasting of the local digital broadcast is completed based on the extracted packet, a step of displaying that the local digital broadcast is received is included.
It should be noted that calculation means (processors such as a CPU, DSP, MPU) can be used as necessary for calculation and processing of each step.

Although the present invention has been described as a receiving apparatus on the receiving side and a method in the receiving apparatus, the present invention may be configured as a method in the broadcasting apparatus on the transmitting side. For example, a digital broadcast broadcast (transmission) device for transmitting wide-area and local digital broadcast streams according to another invention is as follows:
A receiver that receives a plurality of streams of the wide-area digital broadcast;
An acquisition unit for acquiring data broadcast content of the local digital broadcast;
A generating unit that generates a stream in which a null packet in a stream received by the receiving unit is replaced with a packet including data broadcasting content of a local digital broadcast acquired by the acquiring unit;
A transmission unit for transmitting the stream generated by the generation unit;
It is characterized by comprising.

Furthermore, a transmission control method for wide area and local digital broadcast streams according to another embodiment includes:
Receiving a plurality of streams of the wide area digital broadcast;
Obtaining data broadcast content of the local digital broadcast;
Generating a stream in which the acquired packet including the local digital broadcast data broadcast content is replaced with a null packet in the received stream and / or a packet including the wide area digital broadcast data broadcast content;
Transmitting the generated stream;
It is characterized by including.
It should be noted that calculation means (processors such as a CPU, DSP, MPU) can be used as necessary for calculation and processing of each step.

  According to the present invention, the existence of a unique service of a broadcasting apparatus that broadcasts in a limited area without accessing a broadcasting station website, wasteful processing such as channel scanning and segment scanning, and communication costs. The user can be notified.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, terms will be explained. “Unique broadcast (service) (unique program / independent program)” means an area-limited broadcast (local broadcast) that is created with or without the use of an existing broadcast station service other than an existing broadcast station It is a service (program) provided uniquely by a broadcasting apparatus that performs the above. For example, it refers to a service (program) that provides information on a limited area or facility such as a shopping street, an amusement park, or a museum. “Wide-area broadcasting” refers to digital broadcasting broadcast by an existing broadcasting station. “Local broadcast” refers to digital broadcast broadcast by a local broadcast device.

  FIG. 1 is a configuration diagram of a broadcasting system including a receiving apparatus to which the present invention is applied and a broadcasting apparatus that provides broadcast waves to the receiving apparatus. As shown in the figure, this broadcasting system includes a receiving device 100 and broadcasting devices 200 and 300. The broadcasting apparatus 200 is a broadcasting apparatus of a general wide-area digital broadcasting system, and uses one segment broadcasting, that is, digital broadcasting using a segment for partial reception that can be received by only one segment, and 12 segments. Digital broadcasting for terrestrial TV. The receiving device 100 according to the present invention can receive a digital broadcast broadcast from the broadcasting device 200 in a reception area covered by the broadcasting device 200. The broadcast device 300 broadcasts all or part of the service broadcast from the broadcast device 200 using a physical frequency band different from the physical frequency band used by the broadcast device 200. The broadcast device 300 also broadcasts a service different from the service broadcast by the broadcast device 200, for example, an original broadcast (original program / independent program). For example, when a user carrying the receiving device 100 enters a store or the like equipped with the broadcasting device 300, the receiving device 100 uses the broadcasting device 200 in addition to the general wide-area digital broadcasting. It is also possible to receive broadcasts. The receiving apparatus 100 according to the present invention is configured to perform an operation such as channel scanning on the presence of the unique broadcast by the broadcast apparatus 300 in the broadcast area of the broadcast apparatus 300 that broadcasts the service provided by the broadcast apparatus 200 and the unique broadcast locally. The user can be notified without performing the operation.

  FIG. 2 is a block diagram of the broadcasting device 300. As shown in the figure, the broadcasting device 300 includes a number of receiving units corresponding to the number of channels input from the plurality of broadcasting devices 200, that is, a chA receiving unit 310A, a chB receiving unit 310B, and a chZ receiving unit 310Z. . The broadcasting apparatus 300 further includes a multiplexing processing unit 320, a modulation unit 330, a transmission unit 340, an antenna 350, and a DSM-CC section creation unit 360. The chA receiving unit 310A, the chB receiving unit 310B, and the chZ receiving unit 310Z include TS signal receiving units 312A, 312B, and 312Z, and service information extracting units 314A, 314B, and 314Z, respectively.

  In this embodiment, the chA receiving units 310A and 310B correspond to existing physical channel broadcasting stations. Here, for the sake of convenience, it is assumed that the chA receiving unit 310A corresponds to, for example, an AAA television of the physical channel chA. The TS signal receiving unit 312A of the chA receiving unit 310A receives a chA TS (Transport Stream) signal transmitted via a transmission means such as an optical fiber from a content storage device of a corresponding broadcasting station, and a service information extracting unit At 314A, service information included in the TS signal is extracted. The chB receiving unit 310B also performs similar processing on the chB TS signal. Further, the chZ receiving unit 310Z corresponds to the original broadcast (service) of the broadcast device 300. The TS signal receiving unit 312Z of the chZ receiving unit 310Z receives a chZ TS signal transmitted from a corresponding content storage device or the like via a transmission means such as an optical fiber, and is included in the TS signal by the service information extracting unit 314Z. Extract service information. The service information extracted from the service information extraction units 314A, 314B, and 314Z is output to the DSM-CC section creation unit 360. The DSM-CC section creation unit 360 uses the service information output from each service information extraction unit or without using the service information. Data broadcast content) packet. In the case of using service information, for example, the original data broadcast content by the broadcasting device 300 can be created including information (service prize information, program program introduction, etc.) related to the service broadcasted by each broadcasting station. When the service information is not used, for example, the unique data broadcast content may be created so as to include only the campaign information of the store where the broadcasting device 300 is installed. The DSM-CC section creation unit 360 creates the unique data broadcast content in a section format compliant with DSM-CC (Digital Storage Media-Command and Control). This DSM-CC will be described later.

  The multiplexing processing unit 320 is the data (unique data broadcast content) created by the DSM-CC section creation unit 360, and is a null packet in the TS signal (stream) received by the reception unit of each channel or the stream of the original broadcast In this example, a packet including data broadcasting content in the existing DSM-CC section format in (corresponding to a chZ TS signal) is replaced and multiplexed so as to generate a new stream. At this time, a control signal or the like is added so as to conform to the digital broadcast signal. Modulation section 330 converts the multiplexed signal into an OFDM signal and sends it to transmission section 340. Transmitter 340 amplifies the OFDM signal to a set value and outputs the amplified signal from antenna 350.

  FIG. 3 is a diagram illustrating an example of a segment configuration of a channel transmitted by the broadcasting device 300. As shown in the upper part of the figure, the broadcasting apparatus 200 which is a normal broadcasting station uses the central segment number 0 for each physical channel for 1-segment broadcasting which is a segment for partial reception. Broadcast apparatus 300 broadcasts the services of segment number 0 for partial reception together in one physical channel. In addition, the broadcasting apparatus 300 can also arrange the unique program in an unused segment (eg, segment number 10 in FIG. 3) as a segment reception segment. A unique program is arranged in the segment number 0 in the center. As described above, the broadcasting apparatus 300 incorporates unique data broadcasting into a service broadcast by an existing wide-area broadcasting station, and retransmits the incorporated stream. At that time, the broadcasting apparatus 300 uniquely identifies a null packet included in the stream of the existing service. Since data broadcasting contents are included, the number of packets (TS packets) including contents of existing services is not changed.

  Here, the transmission mechanism of data broadcast contents in 1-segment broadcasting defined by ARIB STD-B24 will be described with reference to FIG. As shown in the figure, data broadcasting content in 1-segment broadcasting is transmitted repeatedly for a certain period by the DSM-CC data carousel method, and the receiving device acquires content data at an arbitrary timing. Can do. Content data is repeatedly transmitted in units called modules (control blocks), and a set of modules is called a carousel. The carousel includes DII (Download Info Indication: download information display) in which information of the carousel (for example, the number of modules included in the carousel, a module ID (module_id) described later, the size of the module, etc.) is described, and data broadcasting It consists of DDB (Download Data Block) including the content itself.

  Each 1-segment broadcasting service includes a plurality of components (audio, video, data broadcasting, etc.), and each component includes a plurality of modules. In the BML document describing the data broadcasting content, each module transmitted by the DSM-CC method is a descriptor used in various tables of program arrangement information (SI / PSI information), service_id, component_tag, and module_id. Can be uniquely identified. In other words, each service can be uniquely identified by the service ID (service_id), each component can be uniquely identified by the component tag value (component_tag), and each module can be uniquely identified by the module ID (module_id) within the component. . Here, service_id and module_id are an identifier of each service in the network and an identifier of each module in the carousel, and component_tag is a label for identifying a component (video, audio, etc.). As shown in FIG. 11, when the receiving apparatus receives a data stream transmitted by the carousel method for a while, it can complete each module constituting each component, and as a result, present (output) the component. become able to.

  Returning to the description of the broadcast (transmission) apparatus 300, transmission processing by the broadcast apparatus 300 will be described. As described above, the broadcasting device 300 according to the present invention is a packet including uniquely created data broadcast content, and is a null packet in a plurality of wide-area broadcast streams and / or the broadcasting device 300 previously creates a stream. A new stream is generated so as to replace the existing local digital broadcast packet that has been arranged, and the generated stream is transmitted / retransmitted. In other words, broadcast waves for partial reception that can be received by 1-segment broadcasting are extracted and collected, content of an original broadcast is added, and transmission / retransmission is performed on a channel different from the plurality of broadcasting apparatuses 200.

  FIG. 4 shows a flowchart of the transmission / retransmission processing of the broadcasting apparatus 300, and the explanation will be given based on this flowchart. First, in step S11, the DSM-CC section creation unit 360 creates a packet including unique data broadcast content. This packet is generated in the DSM-CC section format so that the component tag value 0x8C and a module ID which is an identifier corresponding to the number of modules to be generated are added and transmitted in the DSM-CC data carousel method. Thereafter, in step S12, each TS signal receiving unit 312A, 310B etc. receives a wide-area broadcast stream, and TS signal receiving unit 312Z receives a local broadcast stream, and each service information extracting unit 314A-314Z The PID of the packet included in the received stream is monitored, and a null packet or an existing data broadcast packet is extracted. In step S13, when a null packet is detected, multiplexing processing section 320 uses the packet containing the original data broadcast content in the DSM-CC section format created by DSM-CC section creation section 360 to generate the null packet. Replace the packet, create a new stream, and remultiplex. Thereafter, in step S <b> 14, the modulation unit 330 performs predetermined modulation processing, and the transmission unit 340 transmits the newly generated stream via the antenna 350.

  Thus, since the null packet in the stream broadcast by each broadcast station of the wide area broadcast is replaced with the content of the original broadcast, the data rate of the original broadcast wave stream is not changed. Therefore, since the service configuration of the original broadcast wave does not change and it is not necessary to rewrite the PMT, it does not take time for the user to newly acquire the PMT. If, in step S13, an existing local digital broadcast packet previously created by the broadcast apparatus 300 and placed in the stream is detected, and there are not enough null packets to be replaced The existing digital broadcast packet is replaced with a newly created original data broadcast packet. This is because the existing digital broadcast packet is repeatedly transmitted with the same data by the DSM-CC data carousel method, and it is highly likely that the packet has already been acquired on the receiving terminal side. Here, FIG. 5 shows a schematic diagram of replacing a wide-area broadcast stream packet with a unique data broadcast packet. As shown in the upper part of the figure, the broadcasting apparatus 300 is configured to newly create a null data packet P1 and / or an existing data broadcasting packet P2 among the packets included in the broadcast wave stream. Substitution with P1 ′ and P2 ′ generates a new stream as shown in the lower part of the figure. Then, the generated new stream is retransmitted. The original data broadcast created in the DSM-CC section format can include both carousel data (DII, DDB) and event messages.

  Next, a receiving apparatus according to the present invention will be described. FIG. 6 is a block diagram of a receiving apparatus according to an embodiment of the present invention. As shown in the figure, the receiving apparatus 100 includes a control unit 110, a tuner unit 120, a demodulation unit 130, an audio decoder unit 140, a video decoder unit 150, a data broadcast decoder unit 160, a screen control unit 170, a memory 180, and an extraction unit 190. And a timer TIM. The receiving apparatus 100 further includes an antenna ANT, a system bus SB, a speaker SP, a screen display unit DIS, and an input unit KEY.

  The function of each part of the receiving apparatus 100 will be described in detail. The receiving apparatus 100 receives an RF signal of digital broadcasting with an antenna ANT, and the received RF signal is tuned by the tuner section 120 based on a frequency (channel) designation command from the control section 110 that controls the entire apparatus. . The channel signal frequency-converted by the tuner unit 120 is demodulated into an MPEG TS signal by the demodulator unit 130, and an audio packet, a video packet, and a data broadcast packet are detected from the packets in the TS signal based on the packet ID. The packet is output to the audio decoder unit 140, the video decoder unit 150, and the data broadcast decoder unit 160. The audio decoder unit 140 decodes the audio data and outputs it to the speaker SP. The video decoder unit 150 decodes the video data and outputs it to the screen control unit 170. The data broadcast decoder unit 160 creates a data broadcast screen image based on BML (Broadcast Markup Language) included in the received data broadcast packet, and outputs it to the screen control unit 170. The screen control unit 170 outputs the data output from the video decoder unit 150 and the data broadcast decoder unit 160 to the screen display unit DIS. Further, the memory 180 stores a packet identifier (PID) of a packet including the unique data broadcast content.

  As described above, data broadcasting in 1-segment broadcasting is transmitted by a data carousel (DSM-CC) system. Here, the operation of the digital broadcast receiving apparatus at the start of data broadcast reception will be schematically described. First, the receiving apparatus describes the PID value of a PMT having a predetermined PID (components transmitted in one service (for example, each element such as video, audio, data, and subtitles) and the component tag value of each component. Get). Thereafter, the PID of the packet including the component with the component tag value 0x80 is read from the PMT, and the packet including the component with the component tag value 0x80 is filtered from the TS using the PID. Strictly speaking, a BML document “startup.bml” arranged in a startup module with a module_id “0x0000” included in a component whose component tag value is 0x80 is first acquired. This BML document is called a “startup BML document”, and describes a startup screen to be presented first after reception of data broadcasting is started.

  The acquired startup module is temporarily stored in a buffer, for example. At the same time, modules other than the start-up module that are repeatedly transmitted by the data carousel method are temporarily stored in the content buffer as much as possible. That is, DDBs for a plurality of modules are acquired simultaneously. When the acquisition of the startup module is completed, the startup BML document to be presented first is analyzed, and the data broadcast content is presented (output) on the screen. At this time, when image data or the like is referred to from the BML document, it is determined whether or not a module including the data is stored in the content buffer. If the module is already acquired, reading is performed from the content buffer. On the other hand, when a necessary module has not been acquired, the presentation (output) process is put on standby until acquisition from the data carousel is completed. When acquisition of all modules necessary for presentation (output) of the BML document is performed, data broadcast content is presented (output) based on the acquired modules.

  Hereinafter, when the receiving device 100 of the present invention receives a wide-area digital broadcast (ordinary data broadcast) broadcast from the broadcasting device 200, a user carrying the receiving device 100 of the present invention moves, for example. An embodiment of the receiving apparatus 100 according to the present invention when the receiving apparatus 100 according to the present invention enters the local broadcast area where the broadcasting apparatus 300 broadcasts the original data broadcast will be described. The receiving apparatus 100 according to the present invention displays a message to that effect on the display unit of the receiving apparatus 100 when entering a local broadcast area for broadcasting a unique data broadcast while receiving a wide area digital broadcast. The user is notified of the existence of the unique service of the broadcasting apparatus 300 that is broadcasting. FIG. 7 is an example of a transition diagram of the display screen of the receiving apparatus 100 when entering a local broadcast area that broadcasts only original data broadcast that does not provide video / audio service during reception of wide area digital broadcast.

  In the embodiment described below, the broadcast (transmission) apparatus 300 creates the component tag value of the unique data broadcast as 0x8C by the DSM-CC section creation unit 360. First, the receiving device 100 in the broadcasting area of the broadcasting device 200 starts viewing the wide area data broadcast based on, for example, a channel selection instruction from the user by the input unit KEY. That is, the extraction unit 190 of the receiving apparatus 100 extracts (acquires) a wide area data broadcast startup module (a module having the component tag value 0x80 and the module ID 0x0000) from the data carousel received by the antenna ANT, and stores it in the memory 180. To go. At this time, the screen display unit DIS displays a message indicating that the data broadcast is being received, for example, “Receiving data broadcast ...” on the screen D10 in FIG. When the acquisition of the wide area data broadcast startup module is completed, the data broadcast decoder unit 160 analyzes the startup BML document arranged in the startup module. The screen control unit 170 displays a wide area data broadcast startup screen on the screen display unit DIS based on the analysis result by the data broadcast decoder unit 160. An example of the screen display unit DIS at this time is shown in a screen D11. In the example of the screen D11, for example, a data broadcast of AAA television is received, and the contents are “program” “news” “weather” “stock price”.

  Thereafter, it is assumed that the user carrying the receiving apparatus 100 moves to a broadcasting area for local unique data broadcasting by the broadcasting apparatus 300. Then, the extraction unit 190 of the receiving apparatus 100 extracts (acquires) a startup module (a module having the component tag value 0x8C and the module ID 0x0000) of the unique data broadcast from the data carousel received by the antenna ANT, and stores it in the memory 180. To go. Thereafter, when the acquisition of the startup module for the unique data broadcast is completed, a text button R1 for notifying the user that the unique data broadcast exists, such as “with local area information”, is displayed as shown in the screen D12. . This text button R1 can be set so that the user can select it by a startup BML document of independent broadcasting. After that, when the button is selected by the user, a display screen of the unique data broadcast specified by the startup BML document of the unique broadcast, for example, a screen D13 is displayed. Note that the transition from the screen D12 to the screen D13 is performed when there is an explicit operation by the user such as selection of a button as described above, or when the user operates the original data broadcast for a certain period of time using the timer TIM ( The content creator of the original data broadcast can freely set by the description of the start-up BML so that a transition is made when an operation for clearly viewing or not viewing is not performed. In the case of the screen D13, for example, when the user selects the button “return to the normal data broadcast screen”, the screen display unit DIS returns to the wide area data broadcast display screen such as the screen D14. Similarly, the transition from the screen D13 to D14 can be freely set by the content creator of the original data broadcasting in the description of the BML document so as to be triggered by an explicit operation by the user or after a predetermined time has elapsed. be able to. Also, on the screen D14, even after viewing the local area information once, the fact that there is a unique broadcast is displayed with the text button R1 “local area information present” similar to the screen D12. For example, an icon is displayed at the top of the screen. It may be displayed.

  Note that the order of acquiring the startup modules for wide area data broadcasting and unique data broadcasting may be reversed. In this case, even if acquisition of the startup module of the independent data broadcasting is completed, notification that the original broadcasting exists is not performed as described above, and notification is made after acquisition of the startup module of wide area data broadcasting is completed. Assumed to be performed. That is, the acquired startup module of the unique data broadcast is stored in the memory 180 and waits for the acquisition of the startup module of the wide area data broadcast to be completed. In this case, the display on the screen display unit DIS transitions from the screen D10 to the screen D12. In other words, a start-up screen for wide area data broadcasting is displayed, and at the same time, notification of the existence of an original broadcast is displayed. As described above, since the control is performed so that the user is not notified of the existence of the unique broadcast before the wide area data broadcast is displayed, there is an advantage that the user is not confused with the wide area data broadcast and the unique broadcast.

  Next, another embodiment of the receiving apparatus 100 of the present invention will be described. In this embodiment, the receiving apparatus 100 notifies the user that there is a unique data broadcast when entering the local broadcast area that broadcasts the unique data broadcast and the video / audio service while receiving the wide area data broadcast. When the user performs an operation such as viewing an original data broadcast, a channel for broadcasting the original broadcast is automatically selected. FIG. 8 shows an example of a screen transition diagram of the screen display unit DIS when the present embodiment is applied. Screen transitions shown on the screens D20 to D22 are the same as the screen transitions shown on the screens D10 to D12 in FIG. That is, the receiving apparatus 100 acquires a wide area data broadcast startup module (a module having a component tag value 0x80 and a module ID 0x0000) and displays a wide area digital broadcast start-up screen. When the module having the value 0x8C and the module ID 0x0000 is acquired, the user is notified by displaying, for example, a text button R1 that “there is local area information”, that there is a data broadcast by an independent broadcast. In this example, the user is watching a broadcast including a data broadcast of AAA television broadcast on 13ch.

  Thereafter, the user clicks (selects) the text button R1 of “with local area information” via the input unit KEY in order to view the unique data broadcast. Then, the receiving apparatus 100 reads the BML document describing the acquired start-up module of the original broadcast by the data broadcast decoder unit 160 and notifies the screen control unit 170 when the reading is completed. In the present embodiment, the BML document describes a script for selecting a channel that broadcasts an independent broadcast when the BML document has been read. Accordingly, the screen control unit 170 controls the screen display unit DIS to switch to the channel that broadcasts the original broadcast when the data broadcast decoder unit 160 completes the reading of the BML document. An example of the screen display at that time is shown in a screen D23. Like the screen D23, a service video of the channel 30 that broadcasts the unique broadcast is displayed on the screen display unit DIS (audio is output), and a startup screen of the unique data broadcast is displayed (startup module). Until the analysis processing) is completed, a notification to the user that “data broadcasting is being received ...” is displayed. In the above description, the startup module reading process of the unique data broadcast is started by the user's operation via the input unit KEY. For example, a notification “local area information exists” is displayed using the timer TIM. If the user does not perform an operation related to data broadcasting for a certain period of time (an operation that clearly indicates whether to view or not), the reading process can be automatically started.

  The processing of the receiving apparatus 100 described above will be described using a flowchart. FIG. 9 is a flowchart illustrating an example of a data broadcast viewing process performed by the receiving apparatus 100. First, in step S21, when receiving an instruction to view a data broadcast via the input unit KEY, for example, from a user, the receiving apparatus 100 receives a wide-area or local data broadcast startup module. That is, the extraction unit 190 extracts a packet having a PID corresponding to a wide area broadcast having a component tag value 0x80 and a module ID 0x0000 and a packet having a PID corresponding to a local broadcast having a component tag value 0x8C and a module ID 0x0000. Receive. The PID is stored in the memory. Since the broadcasting device 200 does not modify the PMT, the component with the component tag value 0x8C is not described in the PMT. However, the receiving device 100 is set in advance to correspond to the component tag value 0x8C. A packet having the specified PID is monitored and received. Thereafter, the demodulation unit 130 and the data broadcast decoder unit 160 perform predetermined processing, extract a module from the received packet, and store (buffer) it in the memory 180 for each component (that is, for each component tag value).

  Next, in step S22, the screen control unit 170 determines which of the wide-area and local broadcast startup modules has been acquired first (whether the startup module has been completed). If the acquisition of the wide-area broadcast startup module (component tag value 0x80, module ID 0x0000) is completed, the process proceeds to step 23 and the screen display unit DIS is controlled to display the wide-area broadcast startup screen. To do. Here, in the BML document describing the start-up module for wide area broadcasting, for example, a screen different from the start-up screen is displayed so as to transit to another module (component tag value 0x80, for example, module ID 0x0001). If so, a screen based on the other module is displayed. Thereafter, in step S24, when acquisition of the local broadcast start-up module (component tag value 0x8C, module ID 0x0000) is completed, the screen control unit 170 displays a screen to notify the existence of the unique data broadcast by the local broadcast. The display unit DIS is controlled.

  On the other hand, if the acquisition of the local broadcast startup module is completed prior to the wide area broadcasting in step S11, the receiving apparatus 100 proceeds to step S25, and the local broadcast startup module such as display of the local broadcast startup screen is displayed. This process is not performed, and the process waits until acquisition of the wide-area broadcast startup module is completed. When the acquisition of the wide-area broadcast startup module is completed, the process proceeds to step S26, and the screen control unit 170 simultaneously notifies the start-up screen based on the wide-area broadcast startup module and the presence of the data broadcast by the local broadcast. To control.

  Next, the receiving apparatus 100 according to the present invention moves from the broadcasting area of the wide area digital broadcasting to an area where only the local broadcasting area by the broadcasting apparatus 300 can be received, and then can receive only the wide area digital broadcasting that cannot receive the local broadcasting. An embodiment of the receiving device 100 according to the present invention when moving to a broadcast area will be described. In this embodiment, when a local broadcast including an original broadcast is received, the presence of the original broadcast is notified to the user. However, when the user moves to an area where the local broadcast cannot be received, the notification or the Stop displaying content. FIG. 10 shows a schematic diagram of screen transition of the screen display unit DIS of the receiving apparatus 100 when the user moves between an area where only the wide area broadcast can be received and an area where only the local broadcast can be received. Screens D30 to D31 are transition diagrams from the acquisition of the wide-area digital broadcast startup module to the display of the wide-area digital broadcast startup screen, similar to the above-described processing, and are not described here. Thereafter, when the user moves to the local broadcast area, the receiving apparatus 100 selects a segment that broadcasts the same service as the service of the broadcast station received in the wide-area broadcast area in the local broadcast, and the content of the same service Is continuously displayed (screen D32). Thereafter, processing similar to that in the above-described embodiment is performed to acquire a start-up module for local broadcast, and display on the screen display unit DIS that the user is notified of the presence of the unique digital broadcast by local broadcast (screen D33). . Next, in this embodiment, it is assumed that the user performs a predetermined operation to view the unique data broadcast, and the unique data broadcast content is displayed on the screen display unit DIS as in the screen D34. After that, when the user of the receiving apparatus 100 moves to an area where the local broadcast cannot be received, the receiving apparatus 100 stops displaying the original data broadcast content that has been received so far, and is viewed before viewing the local broadcast. A wide-area broadcast that broadcasts the same service is selected, and only the content of the service broadcast in the wide-area broadcast is displayed on the screen display unit DIS (screen D35).

  The effect of the present invention will be described again. According to the present invention, access to a broadcasting station website, useless processing such as channel scanning and segment scanning, and the unique service of a local broadcasting device that broadcasts in a limited area without requiring communication costs. The presence can be notified to the user. In addition, since the unique data broadcast content is presented to the user after the wide-area data broadcast content is presented, there is an advantage that the user is not confused. In addition, local broadcasting that broadcasts in a limited area uses a physical frequency band that is different from wide-area broadcasting, and broadcasts by incorporating a unique local broadcasting service into wide-area broadcasting services. There is no need to change the service (component or stream configuration), and local broadcasting can be easily performed. Further, since the same DSM-CC data carousel method as that of the existing data broadcasting is used, the creator side of the original data broadcasting content can easily create the data broadcasting content. Further, the packet including the original data broadcast content to be broadcast is replaced with the null packet of the existing stream and / or the packet including the data broadcast content that has been transmitted previously, so that the existing wide area and / or local broadcast packet is replaced. This has the advantage that the configuration is not changed. In addition, the receiving apparatus can also view the original data broadcast content by the existing data broadcast analysis processing, and thus has an advantage that it is not necessary to change the configuration significantly.

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, the functions included in each component, each step, etc. can be rearranged so that there is no logical contradiction, and multiple components, steps, etc. can be combined or divided into one It is.

1 is a configuration diagram of a broadcasting system including a receiving device to which the present invention is applied and a broadcasting device that provides broadcast waves to the receiving device. 1 is a block diagram of a broadcasting device according to an embodiment of the present invention. It is a figure which shows the segment structural example of the channel which the broadcast apparatus 300 transmits. 6 is an example of a flowchart showing a transmission process by the broadcast device 300. It is the schematic explaining a mode that the broadcasting apparatus 300 substitutes TSP of original data broadcasting for the existing stream. It is a block diagram of the receiver by one embodiment of this invention. It is a screen transition diagram of the receiving device in one embodiment of the present invention. It is a screen transition diagram of the receiver in another embodiment of the present invention. 6 is an example of a flowchart showing a reception process by the reception device 100. It is a screen transition diagram of the receiving device in still another embodiment of the present invention. It is the schematic explaining the data transmission by a DSM-CC data carousel system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Receiver 110 Controller 120 Tuner 130 Demodulator 140 Audio decoder 150 Video decoder 160 Data broadcast decoder 170 Screen controller 180 Memory 190 Extractor 200,300 Broadcaster 310A chA receiver 310B chB receiver 310Z chZ receiver Unit 314A, 314B, 314Z service information extraction unit 320 multiplexing processing unit 330 modulation unit 340 transmission unit 350 transmission antenna ANT antenna KEY input unit SP speaker DIS screen display unit TIM timer SB system bus P1, P2, P1 ', P2' packet D10 to D14, D20 to D23, D30 to D35 screen

Claims (6)

A digital broadcast receiving apparatus having a receiving unit and a display unit for receiving wide-area and local digital broadcasting streams,
An extraction unit that extracts a packet having a predetermined packet identifier from the stream received by the reception unit;
A control unit that controls the display unit to display that the local digital broadcast is received when acquisition of the data broadcast module for the local digital broadcast is completed based on the packet extracted by the extraction unit When,
A digital broadcast receiver characterized by comprising: The digital broadcast receiver according to claim 1,
When the acquisition of the start-up module for data broadcasting of the local digital broadcasting is completed , the control unit controls the display unit to display that the local digital broadcasting is received.
A digital broadcast receiver characterized by that. The digital broadcast receiver according to claim 2,
The control unit completes the acquisition of the local digital broadcast data broadcast module from the packet extracted by the extraction unit until the acquisition of the local digital broadcast data broadcast startup module is completed. Control the display unit not to display that the local digital broadcast is received,
A digital broadcast receiver characterized by that. The digital broadcast receiver according to claim 2 or 3,
The extraction unit further extracts a packet having a packet identifier corresponding to a data broadcast content of a wide-area digital broadcast from the digital broadcast stream received by the reception unit,
The control unit completes acquisition of the wide-area digital broadcast data broadcast startup module and controls the display unit to display content corresponding to the wide-area digital broadcast data broadcast startup module. Controls the display unit not to display that the local digital broadcast is received even when acquisition of the data broadcast module for the local digital broadcast is completed ,
A digital broadcast receiver characterized by that. In a reception control method for a wide-area and local digital broadcast stream,
Receiving the wide-area and local digital broadcast streams;
Extracting a packet having a predetermined packet identifier from the received stream;
When the acquisition of the module for data broadcasting of the local digital broadcast is completed based on the extracted packet, displaying that the local digital broadcast is received;
A digital broadcast reception control method comprising: A digital broadcast transmission device for transmitting wide-area and local digital broadcast streams,
A receiver that receives a plurality of streams of the wide-area digital broadcast;
An acquisition unit for acquiring data broadcast content of the local digital broadcast;
A generating unit that generates a stream in which a null packet in a stream received by the receiving unit is replaced with a packet including data broadcasting content of a local digital broadcast acquired by the acquiring unit;
A transmission unit for transmitting the stream generated by the generation unit;
A digital broadcast transmitter characterized by comprising:

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