JP2010130640A - Digital broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To remedy operability confusion or trouble due to retransmission by BS, when receiving a safety net as countermeasures against viewing difficulties of terrestrial digital broadcast. <P>SOLUTION: A digital receiver holds beforehand-tuning information to be used for performing tuning by a tuner 16. In the tuning information, a retransmission service by the BS for a viewing difficulty area of digital broadcast is stored as a service of terrestrial digital broadcast. Thus, when an operation instructing tuning is input to a remote controller 10, the retransmission service by the BS can be tuning-instructed as a service of terrestrial digital broadcast. Furthermore, when an electronic program guide is displayed by using the tuning information, retransmission service by the BS is also displayed as an electronic program guide of terrestrial digital broadcast. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a digital broadcast receiver, and more particularly to a digital broadcast receiver that supports retransmission of terrestrial digital broadcasts to difficult viewing areas.

  The frequency band that can be used for satellite broadcasting in Japan is the 11.72 to 12.00 GHz band (first, third, fifth, seventh, ninth, eleventh, thirteenth, fifteenth) at the World Radiocommunications Administration Conference in 1977 (8 analog channels in total), and at the 2000 World Wireless Communication Conference, the digital 8 channels of this channel and the 12.00-12.20 GHz band (17th, 19, 21, 23 total channels) A total of 12 digital channels were allocated.

  Currently, of these, five transponders (trapons) Nos. 1, 3, 9, 13, and 15 are used in BS (Broadcasting Satellite) digital broadcasting, and Nos. 5, 7, and 11 are used in analog broadcasting. Yes. Also, within FY2009, the 17th Trapon is scheduled to be retransmitted (safety net) using terrestrial digital broadcasting as a countermeasure against the difficulty in viewing terrestrial digital broadcasting. Such hard-to-view countermeasures can be applied to areas where digital terrestrial broadcasting cannot be received or reception conditions are poor (difficult to watch) depending on the position of the antenna of the installed broadcasting station when switching from terrestrial analog broadcasting to terrestrial digital broadcasting. In other words, the terrestrial digital broadcasting is retransmitted to the difficult viewing area by using the BS.

  The safety net is intended for residents in difficult-to-view areas, and is scrambled by a B-CAS (BS Conditional Access Systems) card and can be viewed by the same means as pay broadcasting by notification from the target household. The B-CAS card records contract information for descrambling TS packets that have been scrambled during broadcasting. By this measure, people in difficult viewing areas can watch the safety net with a commercial receiver. Ordinary people who do not fall into the difficult viewing area cannot view the safety net with a commercial receiver.

For example, Non-Patent Document 1 describes transport stream identification (transport_stream_id, hereinafter referred to as TS_id) allocation as shown in Table 40 of FIG.
In Table 40, the TMCC signal refers to a Transmission and Multiplexing Configuration Control signal (Transmission Multiplex Control signal). In addition, (Note 1) describes that “use of 9 channels starts from December 1, 2007”. (Note 2) states that “channels 5, 7, and 11 are assumed to be used for digital broadcasting when analog broadcasting ends.” (Note 3) “bit (8) is“ 0 ”. However, there is a further channel addition. On the other hand, when operation is performed with the same network ID (network_id), bit (8) is set to “1”, and the channel number is combined with bit (7-4). It shall be shown. Is stated.

  In Non-Patent Document 1, “0x0000 and 0xFFFF are not assigned as TS_id in Table 40. In the future, for example, when a relay to which a certain TS is transmitted is changed, ID However, the default TS IDs (0x40f1 and 0x40f2) required for the initial setting of the receiver are not changed, and the default TS IDs required for the initial setting of the receiver are unified among manufacturers. It is desirable to measure and post on TR. "

As a digital broadcast receiving apparatus, Patent Document 1 discloses a digital broadcast receiving apparatus in which a digital broadcast that is simply frequency-converted and retransmitted is selected by an electronic program guide, PAT, or NIT. . Here, based on the information of the storage means for storing the transport stream number of digital broadcasting described in NIT, the transmission frequency information, and the reception frequency information which is the retransmitted frequency, the control unit of the digital broadcast receiving apparatus Controls the tuner section.
JP 2000-333136 A "BS / Broadband CS digital broadcasting operation regulation technical data ARIB TR-B15 4.0 edition", Japan Radio Industry Association, May 29, 2007

  A digital broadcast receiving apparatus such as a television apparatus uses a remote control as its operation means. FIG. 12 schematically shows an example of operation buttons on the remote controller. The remote controller 10 is provided with a one-touch button 10a, and the user can select a broadcast service assigned to the one-touch button 10a by operating the one-touch button 10a. The remote controller 10 transmits an operation signal corresponding to the operated one-touch button 10a to the digital broadcast receiving device, and the digital broadcast receiving device receives and analyzes the operation signal, and uses the broadcast service instructed by the operation signal to the tuner. It is set and selected.

  Here, in the remote controller 10, a channel selection for the one-touch button 10a is assigned for each reception mode. As the reception mode, for example, three reception modes of terrestrial digital (terrestrial D), BS, and CS are set, and the reception mode can be arbitrarily switched by the broadcast switching button 10b. When the user operates the one-touch button 10a, the broadcast service assigned to the one-touch button 10a is selected according to the currently selected reception mode. The number of one-touch buttons 10a is twelve, and the remote controller 10 can assign 12 types of broadcast services to the one-touch buttons 10a for each reception mode.

  FIG. 13 is a flowchart for explaining an example of network determination processing in a conventional digital broadcast receiving apparatus. The digital broadcast receiving apparatus acquires information for channel selection from the NIT of the received broadcast signal. Here, it is determined whether or not the network ID (network_id) of the broadcast service is “4” (step S41). If the network ID is “4”, the reception mode is determined as BS. On the other hand, if the network ID is not “4”, it is further determined whether the network ID is “6” or “7” (step S43).

If the network ID is “6” or “7”, the reception mode is determined as CS (step S44). If it is not “6” or “7”, the network ID is 0x7B00 or more and 0x7FF0 or less. Is determined (step S45). If the network ID is 0x7B00 or more and 0x7FF0 or less, the reception mode is determined as the ground (step S46), and if not, the reception mode of the broadcast service is unknown (step S47).
As described above, in the conventional digital broadcast receiving apparatus, the reception mode (BS, CS, terrestrial) of the broadcast service is uniformly determined based on the network ID acquired from the NIT. That is, even a safety net that is a terrestrial digital retransmission has been determined as a BS based on the network ID.

FIG. 14 is a diagram showing an example of assignment of a broadcast service to a conventional one-touch button. The number of a one-touch button (single touch number) for each reception mode (terrestrial D, BS, CS) and the service assigned to the one-touch button ID. The service ID assigned to the one-touch button is a three-digit number assigned to digital broadcasting.
When the safety net is implemented as a countermeasure for difficult viewing as described above, terrestrial digital broadcasting cannot be received in the difficult viewing area. Therefore, there is no service ID assigned to the one-touch button of the remote control in the reception mode of terrestrial D. All the one-touch keys in are free. As for CS, currently provided services are assigned to CS mode one-touch buttons.

Twelve broadcast services are already assigned and buried in the one-touch button 10a corresponding to the BS reception mode of the remote controller 10. This is because the service IDs “101”, “102”, “103”, “141”, “151”, “161”, “171”, “181”, “191”, “ This is because the BS digital broadcasting service of “200”, “211”, and “222” is provided.
In other words, even if the terrestrial digital broadcast is retransmitted by the BS using the safety net, the safety net service cannot be assigned to the one-touch button in the BS reception mode.

  In addition, even when an electronic program guide (EPG) is obtained from a digital broadcast and displayed, the retransmitted program is a digital terrestrial broadcast program because the safety net is retransmitted by the BS. Nevertheless, it is displayed as a BS program guide, which causes problems in terms of operability.

Patent Document 1 discloses a receiving apparatus related to a system for converting and retransmitting a physical channel of digital terrestrial broadcasting. Here, since the signal is not modified on the transmission side, the frequency received on the receiver side is stored, and the frequency stored at the time of reception is used at the time of channel selection without using the frequency information described in the NIT. It is something to try.
The technique of Patent Document 1 is applied to a system in which only the frequency is converted and retransmitted without modifying the signal on the transmission side, and as described above, the signal is modified on the transmission side, Is not applicable to a system that retransmits the signal as a BS signal.

  The present invention has been made in view of the above-described circumstances, and has improved operability confusion and malfunction caused by re-transmission by a BS when receiving a safety net as a countermeasure for difficult viewing of digital terrestrial broadcasting. The object is to provide a receiving device.

  In order to solve the above-described problem, the first technical means of the present invention includes a channel selection unit that selects a received digital broadcast and a channel selection information that is used for channel selection by the channel selection unit. A digital broadcast receiving apparatus comprising a station information storage unit and a user operation means for receiving an operation input by a user, wherein the channel selection information storage unit provides a re-transmission service by a BS for a difficult viewing area of the digital broadcast. This is characterized in that it is possible to instruct the re-transmission service by the BS as a terrestrial digital broadcast service when performing an operation input for instructing channel selection to the user operation means. is there.

  In the first technical means, when the channel selection information to be stored in the channel selection information storage unit is created in the first technical means, the broadcast service is broadcast by the terrestrial digital broadcast with TS_id included in the received NIT of the digital broadcast. It is characterized by being stored in the channel selection information storage unit as a service.

  In the first technical means, when the channel selection information to be stored in the channel selection information storage unit is created in the first technical means, the 8th bit to the 5th bit from the lower order of TS_id included in the NIT of the received digital broadcast (11-9) is characterized in that the broadcast service is stored in the channel selection information storage unit as a broadcast service based on digital terrestrial broadcasting.

  In the first technical means, when the channel selection information to be stored in the channel selection information storage unit is created in the first technical means, the 8th bit to the 5th bit from the lower order of TS_id included in the NIT of the received digital broadcast (11-9) is stored in the channel selection information storage unit as a broadcast service based on terrestrial digital broadcasting.

  According to a fifth technical means, in any one of the first to fourth technical means, a program information storage unit that stores program information related to a broadcast service of digital broadcasting received by the broadcast receiving unit, and a program information storage unit that stores the program information. Electronic program guide generating means for generating an electronic program guide from the program information, and the electronic program guide generating means receives the channel selection information when an operation input for displaying the electronic program guide is performed on the user operation means. According to the channel selection information stored in the storage unit, the BS retransmission service is recognized as a terrestrial digital broadcasting service, and the electronic program guide of the retransmission service is displayed as an electronic program guide of the terrestrial digital broadcasting. .

  ADVANTAGE OF THE INVENTION According to this invention, when receiving the safety net as a countermeasure against difficult viewing of digital terrestrial broadcasting, it is possible to improve operability confusion and malfunction caused by retransmission by the BS.

  The digital broadcast receiving apparatus according to the present invention may be any apparatus provided with broadcast receiving means for receiving a digital broadcast and capable of outputting audio or video and audio and data from the digital broadcast. For example, a digital television apparatus, a recorder, Various devices such as a tuner, an STB (Set Top Box), and a digital radio receiver can be applied.

  Hereinafter, as a digital broadcast receiving apparatus according to the present invention, a digital TV apparatus (hereinafter simply referred to as “TV apparatus”) will be described as an example, but the same description can be applied to other devices. For example, in a device that does not include a video display device, such as a recorder, a tuner, and an STB, and that is connected to the video display device, in the following description, the processing may be terminated by outputting a video signal to the video display device. In addition, a device that does not perform video output, such as a digital radio device, corresponds to a device in the following television device that excludes the description of the parts related to reception and display of video signals. In addition, display of menu images, program information, and the like on a device that does not output video may be performed on a display unit such as a display window provided. Further, in the following description, it is assumed that the broadcast receiving means has a configuration capable of receiving BS digital broadcast, and can also receive retransmission of terrestrial digital broadcast using BS digital broadcast.

  FIG. 1 is a block diagram illustrating a configuration example of a television device according to an embodiment of the present invention, in which 1 is a television device and 10 is a remote controller. 1 includes a key input processing unit 11, a menu processing unit 12, a channel selection processing unit 13, an EPG information processing unit 14, an SN reception setting unit 15, a tuner 16, a demultiplexer (DEMUX) 17, and video. An audio processing unit 18, a video output unit 19, and an audio output unit 20 are provided. A part of each unit, for example, the menu processing unit 12, the channel selection processing unit 13, and the EPG information processing unit 14 (and the SN reception setting unit 15) may be configured as one system microcomputer. The television device 1 is assumed to include a video display device connected to the video output unit 19 and a speaker connected to the audio output unit 20 (not shown).

  The remote controller 10 has the configuration shown in FIG. 12 and includes a one-touch button (direct channel selection button) 10a for directly selecting a channel and a broadcast switching button 10b for switching a reception mode. The broadcast switching button 10b includes BS, CS, and terrestrial D (terrestrial digital) buttons. By operating each button, a reception mode corresponding to the button is selected. When the one-touch button 10a is operated, a broadcast service set according to the selected reception mode is selected.

  In addition, the remote controller 10 includes a power button 10c, a direction button 10d, an enter button 10e, and the like. Further, the remote controller 10 has a menu button for displaying a menu screen for performing various settings of the television apparatus 1, an EPG button for displaying an EPG, a direct channel selection button (channel button) corresponding to the number of the one-touch button, and a three-digit channel. UP / DOWN channel selection button for selecting a broadcast service (broadcast channel) corresponding to a number by UP / DOWN, 3-digit input button for starting input of 3-digit channel number Program for displaying individual program information Various buttons (keys) such as an information button and an input switching button for switching an input source can be provided (not shown).

  The remote controller 10 is operated by the user of the television apparatus 1 and transmits an operation signal corresponding to the operation to the television apparatus 1. An operation signal from the remote controller 10 is received by a receiving unit provided in the key input processing unit 11. The key input processing unit 11 analyzes the received operation signal and outputs a control signal corresponding to the operation signal to one or more of the menu processing unit 12, the channel selection processing unit 13, and the EPG information processing unit 14.

  The remote controller 10 and the key input processing unit 11 are an example of a user operation unit that receives a channel selection operation and a display operation of program information (individual program information or EPG) from a user for a digital broadcast received by the broadcast receiving unit. . As another example of the user operation means provided in the television apparatus 1, a key or a button attached to the main body of the television apparatus 1 can be cited. These keys or buttons may be provided together with the remote controller 10 and the key input processing unit 11.

  The menu processing unit 12 receives the control signal from the key input processing unit 11 when the user presses the menu button of the remote controller 10. Then, the menu processing unit 12 instructs the video output unit 19 to display an OSD (On Screen Display) menu image in response to the control signal. The menu processing unit 12 receives a control signal corresponding to the operation signal from the remote controller 10 until the display is finished after the menu screen is displayed by the menu image, and changes the menu image and various setting values. Process. The set value may be stored in a rewritable manner in a nonvolatile memory such as an EEPROM (Electrically Erasable and Programmable Read Only Memory) provided inside or outside the menu processing unit 12.

  When the user specifies a broadcast service that the user wants to watch by operating the one-touch button, the UP / DOWN channel selection button, the 3-digit input button, the numeric button, or the like of the remote controller 10, the channel selection processing unit 13 determines the channel number of the broadcast service. Is received from the key input processing unit 11. Then, the channel selection processing unit 13 converts the service ID (service_id) according to the control signal.

  The channel selection processing unit 13 is instructed by a user operation from channel selection information indicating a correspondence relationship between a service ID, a frequency, TS_id, and the like, which is acquired from a network information table (NIT) and stored in the internal memory in advance. The service number frequency TS_id is obtained, and the obtained frequency and TS_id are set in the tuner 16. As a result, the transport stream (TS) signal of the set TS_id is output from the tuner 16. Then, PSI (Program Specific Information), which will be described later, is output from the DEMUX 17 to the channel selection processing unit 13, and information for designating an audio stream and a video stream related to the service ID to be selected is obtained. By setting the DEMUX 17 with this value, an audio stream and a video stream related to service_id to be selected are output to the video / audio processing unit 18. The channel selection processing unit 13 instructs the video / audio processing unit 18 to start / stop processing associated therewith, and instructs the video output unit 19 and the audio output unit 20 to output / not output video and audio. . The internal memory for storing the tuning information corresponds to the tuning information storage means of the present invention.

  The tuner 16 is connected to an antenna (not shown) having a frequency converter, for example. The antenna receives a digital broadcast signal broadcast from the BS in the TS packet format, and outputs a frequency-converted signal to the tuner 16. The tuner 16 includes a demodulation circuit, a deinterleave circuit, an error correction circuit, and the like, and extracts a TS signal specified by a specific frequency (specific transmission channel) from a high-frequency digital modulation signal including data such as video / audio. Execute the process. In addition, re-transmission of terrestrial digital broadcasting by BS digital broadcasting can be similarly received by this broadcasting receiving means. The channel selection processing unit 13 and the tuner 16 correspond to the channel selection means of the present invention.

  The DEMUX 17 separates the MPEG (Moving Picture Experts Group) -2 TS packet stream output from the tuner 16 into a video (video) stream, an audio (audio) stream, a data stream, and a control stream. The DEMUX 17 outputs the audio stream and video stream of the specified service_id to the video / audio processing unit 18 in accordance with the instruction from the channel selection processing unit 13. Since the specification of the audio stream and the video stream is described in Non-Patent Document 1, it will be omitted.

The data stream is composed of SI (Service Information) TS packets, and program information used mainly for generating EPG images is mainly received as EIT (Event Information Table) TS packets.
Here, in the case of BS digital broadcasting, program information of all broadcasting stations is included in SI, and in the case of normal terrestrial digital broadcasting that is not retransmitted, program information of each broadcasting station is included in SI. The control stream is received as a PSI TS packet. The DEMUX 17 outputs the data stream to the EPG information processing unit 14 and outputs the control stream to the channel selection processing unit 13.

  The PSI includes the above NIT, and further includes specific information of TS packets to be processed by the video / audio processing unit 18. The information in the SI is mainly used by the EPG information processing unit 14 for use in displaying the EPG. Note that the control stream and data stream may be collectively referred to as PSI / SI. Since the PSI / SI TS packet does not need to be descrambled, the information in the TS packet can be acquired and used in the subsequent stage of the DEMUX 17 regardless of the contract information of the B-CAS card.

The EPG information processing unit 14 receives the control signal from the key input processing unit 11 when the user performs an EPG image display operation such as pressing the EPG button with the remote controller 10. Then, the EPG information processing unit 14 obtains program information from the SI in accordance with the control signal, generates an EPG image from the program information for all broadcast services, and displays the OSD display of the EPG image on the video output unit 19. Instruct. In the configuration capable of receiving BS digital broadcasting as in the television apparatus 1, this OSD display can be performed even for retransmission of terrestrial digital broadcasting regardless of whether or not it is a difficult viewing area as described above.
The EPG information processing unit 14 receives a control signal corresponding to the operation signal from the remote controller 10 until the display is terminated after the EPG screen is displayed by the EPG image, and performs a recording reservation process (however, the TV device 1 records the EPG image). In the case where the apparatus is provided or connected), viewing reservation processing, EPG image change processing, and the like are performed.

  In order to acquire program information, the EPG information processing unit 14 has a decoder for program information. Then, the EPG information processing unit 14 takes in TS packets related to the EIT of SI among TS packets output from the tuner 16 via the DEMUX 17, decodes it with a decoder for program information, and stores it in the internal memory. In the case of BS digital broadcasting, since all broadcast service program information is transmitted at once, all program information can be stored in the internal memory at one time. The program information accumulated for all broadcasting services in this way is hereinafter referred to as an EPG database (EPG DB). This EPG DB is rewritten, for example, on a daily basis. In one EIT, information on a program broadcasted for a certain period related to one service ID is described, and further, a value of TS_id corresponding to the corresponding service ID is described. This TS_id value is also stored in the EPG DB.

  Further, the EPG information processing unit 14 performs individual program information directly from SI or from EPG DB in the case of BS digital broadcasting as a process in response to pressing of a program information button for displaying individual program information. Take out. The EPG information processing unit 14 outputs the extracted program information to the video output unit 19 and instructs the video output unit 19 to perform OSD display of individual program information images. The EPG information processing unit 14 corresponds to the electronic program guide generation unit of the present invention, and the internal memory that stores the EPG DB corresponds to the program information storage unit of the present invention.

  The video / audio processing unit 18 includes, for example, a video decoder (video decoder) for MPEG-2, an audio decoder (audio decoder), a video processing circuit, an audio processing circuit, and the like. In the video / audio processing unit 18, the input audio TS packet stream is decoded by an audio decoder to generate an audio signal. After various audio processing is performed by an audio processing circuit, the audio signal is output to the audio output unit 20. . The audio output unit 20 performs D / A conversion on the audio signal, generates, for example, a right (R) sound analog signal and a left (L) sound analog signal, amplifies, and outputs the amplified signal to a speaker. As a result, sound is generated from the speaker.

  Also, the video / audio processing unit 18 generates a video signal by decoding the TS packet stream of the input video by a video decoder, performs various video processing by the video processing circuit, and then sends the video signal to the video output unit 19. Output. It is assumed that synchronization with audio is performed during this output. The video output unit 19 generates a video signal to be displayed on the video display device based on the video signal from the video / audio processing unit 18. Therefore, the video output unit 19 includes, for example, a scaler, an OSD processing unit, a frame memory, and the like. Scaling, conversion to a video signal (for example, a composite video signal) that can be displayed on a video display device, and generation of an OSD image Then, processing such as superposition is performed, and the video signal is output to the video display device.

  The OSD processing unit generates an OSD image signal based on instructions from the menu processing unit 12, the channel selection processing unit 13, the EPG information processing unit 14, and the like, and superimposes the OSD image signal on the video signal input from the video / audio processing unit 18. Output to video display device. The instructions from the menu processing unit 12 include instructions for displaying a menu screen and changing the display according to the operation. The instruction from the channel selection processing unit 13 includes an instruction to display the number of the selected broadcast service (channel). The instructions from the EPG information processing unit 14 include instructions for generating an EPG image and an image showing individual program information, and changing the display of the image according to the operation.

The S / N reception setting unit 15 is used to set ON / OFF the process of assigning the safety net to the terrestrial digital, which is a feature of the embodiment according to the present invention. The S / N reception setting unit 15 switches between ON and OFF according to a user operation. Can be set. A user in a difficult viewing area turns on the S / N reception setting unit, and a user outside the difficult viewing area turns off.
If the S / N reception setting unit 15 is set to ON, the safety net service retransmitted by the BS is assigned to the terrestrial digital mode of the one-touch button of the remote controller, and the safety net is displayed when the electronic program guide is displayed. Is created and displayed as a digital terrestrial program. In addition, when the S / N reception setting unit is set to OFF, it is assumed that it is not a difficult viewing area and the conventional operation is performed.

The safety service assignment process to the one-touch button and the electronic program guide creation / display process, which are the main features of the present invention, executed in the television apparatus 1 configured as described above will be described.
FIG. 2 is a diagram showing a temporal transition of a frequency allocation table in BS digital broadcasting. FIG. 2 illustrates that a plurality of broadcasting services of TS_id indicated by “0x...” Are provided for each transmission frequency (transmission channel) corresponding to the trapon at each period. Note that “0x” indicates that the subsequent integer literal (in this case, a 4-digit number) is in hexadecimal notation. The first transmission channel of the frequency allocation table 31 will be described. In the first transmission channel, there are two TSs whose TS_ids are indicated by “0x4010” and “0x4011”, respectively. A plurality of services can be included in one TS. Here, for example, in the case of high-definition television broadcasting (high-definition broadcasting) with TS_id “0x4010”, one broadcasting service is provided using service IDs “151”, “152”, and “153”. In the case of broadcasting, three different broadcasting services can be provided with service IDs “151”, “152”, and “153”.

  FIG. 3 is a diagram showing a transport stream identification (TS_id) allocation table in BS digital broadcasting, and shows guidelines according to the BS / broadband CS digital broadcasting operation specification ARIB TR-B15. The value of bit (11-9) in 16 bits of TS_id, together with the value of bit (8) (= 0), corresponds to the lower third digit value of “0x...” In FIG. . Furthermore, as shown in the allocation table 40 of FIG. 3, the value of bit (11-9) is “001” as an initial value for the TS_id of a newly commissioned broadcaster that has been added since 2008. A value obtained by sequentially adding 1 is assigned to each time.

  As shown in the frequency allocation table 31 in FIG. 2, on December 1, 2007, the ninth trapon is digitized by the current method, and the first, third, ninth, thirteenth, and fifteen transmission channels 31a are digitized. It has become a state. In these five transmission channels 31a, the value of bit (11-9) in 16 bits of TS_id is “000” based on Table 40 of FIG.

  Further, as shown in the frequency allocation table 32, in March 2010, re-transmission of digital terrestrial broadcasting is started on the seventeenth transmission channel 32b as a safety net for countermeasures to difficult viewing. Based on Table 40, the value of bit (11-9) is “001” for the transmission channel 32b. Here, it is determined that the bit (11-9) is “001” for the safety net service started in 2010.

  Further, as shown in the frequency allocation table 33, in 2011, the fifth, seventh, and 17th transmission channels on which analog services were broadcasted in the stage of March 2010 were switched to BS digital broadcasting. The BS digital broadcasting service is started on the 19th, 21st, and 23rd transmission channels that are idle at the month. In the transmission channel 33c, the value of bit (11-9) is “010” obtained by adding 1 to “001” based on Table 40.

  As described above, the service whose TS_id bit (11-9) is “001” is limited to the service of the safety net that is terrestrial digital retransmission, and the TS_id bit (11-9) value is “ Whether or not the service is a BS digital broadcast safety net service can be determined based on whether or not it is “001”.

FIG. 4 is a diagram for explaining a correspondence relationship between the safety net TS_id and the service ID. The TS_id of the broadcast service transmitted as described above is confirmed, and if the bit (11-9) is “001”, it can be determined that the service is a terrestrial digital broadcast retransmission service by the safety net. In this case, as shown in the example of FIG. 4, if TS_id is “0x4310”, the service ID is 291, 292, 294, and if TS_id is “0x4311”, the service ID is 295, 296. 297,298. These seven service IDs are defined as retransmission services for terrestrial digital broadcasting (Kanto) of seven key stations.
The association between the broadcast service number (service_id) and TS_id is described in the NIT described above, and may be stored in the channel selection processing unit 13 together with the frequency information when acquired.

FIG. 5 is a diagram for explaining an example of assigning a safety net to a remote controller according to an embodiment of the present invention. One touch button number (single touch number) for each reception mode (terrestrial D, BS, CS) It shows the service ID assigned to the one-touch button.
As described above, since the terrestrial digital (terrestrial D) broadcast cannot be received in the difficult viewing area, the one-touch button of the conventional remote control does not have the allocation service in the terrestrial D mode. In the BS mode, the service allocation for the one-touch button is already full, and a new service cannot be allocated.

  Here, in the embodiment according to the present invention, as shown in FIG. 5, the safety net broadcasting service retransmitted by the BS is allocated to the one-touch button on the ground D that is free to be allocated. That is, when the terrestrial digital broadcast is retransmitted by the BS through the safety net, the safety net service is assigned to the one-touch button in the terrestrial D mode instead of the BS mode of the remote controller. As a result, the one-touch button in the BS mode maintains the assignment of the 12 types of broadcasting services as usual, and the service IDs “291”, “292”, “294” to “298” of the safety net in the terrestrial D mode. Can be assigned. Since retransmission by BS actually retransmits a digital terrestrial broadcast program, the user can operate the one-touch button in the terrestrial D mode without feeling uncomfortable.

  In order to perform the assignment as described above, a condition for determining that the service is a safety net service is required. As this condition, as described above, bit (11-9) of TS_id of the broadcast service is “ If it is “001”, it is determined that the service is a safety net service, and otherwise, it is determined that the service is not a safety net service. This determination is executed by the channel selection processing unit 13 of the digital broadcast receiver.

  FIG. 6 is a diagram illustrating an example of the NIT used as information for channel selection. The NIT is included in the PSI as described above. In NIT, information including TS_id (transport Stream id), network ID (original network id), frequency (frequency), modulation method (modulation), service ID (service id), service type, and the like is described for each TS_id. Yes.

  In the digital broadcast receiving apparatus, when the NIT is received when the reception mode is BS, the TS_id bit (11-9) included in the NIT is confirmed, and if the Bit (11-9) is “001”, the terrestrial It is determined that the service is a digital service, and if it is not “001”, it is determined that the service is a BS service.

  FIG. 7 is a flowchart for explaining an example of network determination processing in the digital broadcast receiving apparatus of the present invention. In the digital broadcast receiving apparatus, when the remote controller is operated by the user and the control signal is received, the channel selection information in the channel selection information database stored in advance in the internal memory is referred to, and a specific service ID is determined according to the channel selection information. Select a broadcast. The flow of FIG. 7 shows an example of the network determination process executed when creating the channel selection information database, and shows the process when the SN reception setting unit 15 of the digital broadcast receiving apparatus is set to ON. Yes. When the SN reception setting unit 15 is OFF, since it is not a difficult viewing area, processing is performed according to the flow shown in FIG.

  In FIG. 7, the digital broadcast receiving apparatus first acquires information for channel selection from the NIT of the received broadcast signal. Here, it is determined whether or not the network ID (network_id) of the broadcast service is “4” (step S1). The network ID is described in the NIT, and the channel selection processing unit 13 of the digital broadcast receiver determines the network ID from the received NIT of the broadcast service.

  If the network ID is “4”, the reception mode is BS, but the channel selection processing unit 13 further determines whether the bit (11-9) of TS_id is “001” (step S2). If bit (11-9) of TS_id is not “001”, it is not a safety net (that is, not a retransmission of digital terrestrial broadcasting) (step S3). If it is “001”, BS It can be determined that the service is a safety net service (that is, on the ground) transmitted at step S4.

  On the other hand, if the network ID is not “4” in step S1, the channel selection processing unit 13 further determines whether the network ID is “6” or “7” (step S5). If the network ID is “6” or “7”, it is a CS broadcast service (step S6). If it is not “6” or “7”, the reception mode of the broadcast service is unknown (step S6). Step S7).

FIG. 8 is a diagram illustrating an example of channel selection information created by the digital broadcast receiving apparatus. When the channel selection processing unit 13 of the digital broadcast receiver determines the reception mode by the network determination based on the network ID and TS_id as described above, the channel selection information as shown in FIG. 8 is created as a table and stored in the internal memory. Save as tuning information database.
The channel selection information includes information acquired from the NIT such as service type, service ID (service id), network ID (original network id), frequency (frequency), modulation method (modulation), TS_id (transport Stream id), It is classified and recorded by reception mode.

  In this case, the safety net service is retransmitted by the BS, but is determined to be “ground” by the service determination process of FIG. Therefore, in the channel selection information shown in FIG. 8, safety net services (service IDs “291”, “292”, “294” to “298”) are classified into the “terrestrial” reception mode. As a result, the safety net service is assigned to “terrestrial” in the channel selection information. In addition, as the channel selection information, a CS reception mode (not shown) is also created.

FIG. 9 is a flowchart for explaining a processing example when the one-touch button is operated in the embodiment of the digital broadcast receiving apparatus according to the present invention. The channel selection processing unit 13 of the digital broadcast receiving apparatus selects a service according to the reception mode using the channel selection information when the one-touch button of the remote controller is operated.
Here, when the one-touch button control signal is received by the digital broadcast receiving device in response to a user operation on the one-touch button of the remote control, the channel selection processing unit 13 of the digital broadcast receiving device reads the reception mode (step S11). ). Here, the reception mode is any one of the terrestrial D, BS, and CS, and the digital broadcast receiving apparatus stores information on the broadcast switching button that was last operated by the remote controller. Read the reception mode corresponding to the broadcast switching button.

  And the channel selection process part 13 performs the conversion process from a one-touch button to service ID (step S12). This is a process of converting the signal of the one-touch button transmitted from the remote controller into a service ID for selecting a service corresponding to the one-touch button. Thereafter, the channel selection processing unit 13 performs channel selection processing for a service corresponding to the one-touch button, using the converted service ID (step S13).

  FIG. 10 is a flowchart for explaining in more detail an example of the conversion process from the one-touch button to the service ID, and more specifically shows the conversion process in step S12 of FIG. After the channel selection processing unit 13 of the digital broadcast receiving apparatus reads the current reception mode, if the reception mode is BS (step S21-Yes), conversion is performed in the BS table (step S22). The BS table is a BS mode table of the three tables as shown in FIG. 5, and the channel selection processing unit 13 uses this BS table to convert the one-touch button number into the service ID of the BS. .

  When the reception mode is not BS (step S21-No) but CS (step S23-Yes), the channel selection processing unit 13 performs conversion in the CS table (step S24). The CS table is a CS mode table of the three tables shown in FIG. 5, and the channel selection processing unit 13 uses this CS table to convert the one-touch button number into a CS service ID.

Further, when the reception mode is not CS (step S23-No) and terrestrial digital (terrestrial D) (step S25-Yes), the channel selection processing unit 13 performs conversion using the terrestrial D table (step S26). . The terrestrial D table is a terrestrial D mode table among the three tables shown in FIG. 5, and the channel selection processing unit 13 uses this terrestrial D table to change the number of the one-touch button to the terrestrial digital service ID. Convert.
If the reception mode is not terrestrial D (step S25-No), conversion to a service ID cannot be performed as not applicable.

Through the processing as described above, a service ID corresponding to the remote control one-touch button is obtained. The channel selection processing unit 13 refers to the channel selection information database shown in FIG. 8 and performs channel selection using the channel selection information corresponding to the service ID.
For example, when the current reception mode is the ground D and the number of the one-touch button operated by the user is “4”, “294” is obtained as the service ID from the conversion table of the ground D. According to the service ID, the channel selection processing unit 13 performs channel selection processing using the channel selection information of the service ID “294” from the channel selection information table shown in FIG. In other words, in this case, it becomes possible to select “294” of the safety net assigned to the one-touch button of the ground D mode of the remote controller by the user operating the one-touch button “4” in the ground D mode. .

FIG. 11 is a flowchart for explaining an example of processing when an electronic program guide is displayed by the digital broadcast receiving apparatus of the present invention.
In the embodiment of the digital broadcast receiving apparatus according to the present invention, when displaying the electronic program guide (EPG) of the safety net retransmitted by the BS, the EPG of the service transmitted on the safety net is used as a digital terrestrial program. Can be displayed.

When the user performs an operation to display the EPG with the remote controller, in the digital broadcast receiving apparatus, the EPG information processing unit 14 receives the control signal and refers to the channel selection information database (DB) to determine the corresponding reception mode. All service IDs are read (step S31). The channel selection information DB holds channel selection information as shown in FIG.
The EPG can be displayed on the screen by operating the EPG button of the remote control while receiving the digital broadcast. In this case, the corresponding reception mode is a reception mode of the digital broadcast being received. The reception mode for displaying the EPG can be switched by operating the broadcast switching button on the remote controller. In this case, the switched reception mode is the corresponding reception mode.

  Then, the EPG information processing unit 14 reads program information (individual EPG data) corresponding to the service ID read in step S31 from the EPG DB stored in the internal memory (step S32), and displays the EPG (step S32). S33). If processing of all services read in step S31 is completed (step S34-Yes), the processing is ended. If not completed (step S34-No), the process returns to step S32 to read EPG data. To continue.

In this case, since the safety net service is assigned to the ground reception mode in the channel selection information shown in FIG. 8, when the reception mode is the ground or when it is switched to the ground by the broadcast switching button, EPG information in the safety mode can be displayed as EPG of terrestrial digital broadcasting.
That is, when the reception mode is the ground in the difficult viewing area, the service IDs “291”, “292”, “294” to “298” of the safety net are read out in step S31, and the service ID is supported in step S32. Thus, the EPG data of the safety net can be read out and displayed as the reception mode of the ground D. Thereby, even if it is retransmission by BS, the user can use an electronic program guide as terrestrial digital broadcasting, and can improve operativity.

It is a block diagram which shows the example of 1 structure of the television apparatus which concerns on one Embodiment of this invention. It is a figure which shows the time transition of the frequency allocation table | surface in BS digital broadcasting. It is a figure which shows the transport stream identification (TS_id) allocation table in BS digital broadcasting. It is a figure for demonstrating the correspondence of TS_id of a safety net, and service ID. It is a figure for demonstrating the example of allocation of the safety net to the remote control by embodiment of this invention. It is a figure which shows an example of NIT used as information for channel selection. It is a flowchart for demonstrating the example of a determination process of the network in the digital broadcast receiver of this invention. It is a figure which shows an example of the channel selection information produced with a digital broadcast receiver. It is a flowchart for demonstrating the process example when the one touch button is operated in embodiment of the digital broadcast receiver which concerns on this invention. It is a flowchart for demonstrating in detail the example of a conversion process from a one touch button to service ID. It is a flowchart for demonstrating an example of the process at the time of displaying an electronic program guide with the digital broadcast receiver of this invention. It is a figure which shows roughly the example of the operation button of a remote control. It is a flowchart for demonstrating the example of a determination process of the network in the conventional digital broadcast receiver. It is a figure which shows the example of allocation of the broadcast service to the conventional one-touch button.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Television apparatus, 10 ... Remote control, 10a ... One touch button, 10b ... Broadcast switching button, 10c ... Power button, 10d ... Direction button, 10e ... Decision button, 11 ... Key input processing part, 12 ... Menu processing part, 13 ... Channel selection processing unit, 14 ... EPG information processing unit, 15 ... N reception setting unit, 16 ... tuner, 17 ... DEMUX, 18 ... video / audio processing unit, 19 ... video output unit, 20 ... audio output unit, 31a ... transmission channel 32b, transmission channel, 33c, transmission channel.

Claims (5)

Channel selection means for selecting a received digital broadcast, channel selection information storage unit for holding channel selection information used for channel selection by the channel selection means, and user operation means for receiving an operation input by a user A digital broadcast receiving device comprising:
The channel selection information storage unit stores a retransmission service by a BS for a difficult viewing area of digital broadcast as a service of digital terrestrial broadcasting, and when performing an operation input instructing channel selection to the user operation means, A digital broadcast receiver characterized in that a retransmission service by a BS can be instructed as a terrestrial digital broadcast service.   2. The digital broadcast receiving apparatus according to claim 1, wherein when the channel selection information to be stored in the channel selection information storage unit is created, the broadcast service is converted into a broadcast service by terrestrial digital broadcast using TS_id included in the received NIT of the digital broadcast. The digital broadcast receiving device is stored in the channel selection information storage unit as described above.   2. The digital broadcast receiving apparatus according to claim 1, wherein when creating channel selection information to be stored in the channel selection information storage unit, the 8th to 5th bits from the lower order of TS_id included in the NIT of the received digital broadcast. (11-9) A digital broadcast receiver characterized in that a broadcast service is stored in the channel selection information storage unit as a broadcast service based on terrestrial digital broadcasting.   2. The digital broadcast receiving apparatus according to claim 1, wherein when creating channel selection information to be stored in the channel selection information storage unit, the 8th to 5th bits from the lower order of TS_id included in the NIT of the received digital broadcast. (11-9) A digital broadcast receiving apparatus that stores a broadcast service in which “001” is “001” in the channel selection information storage unit as a broadcast service based on digital terrestrial broadcasting. 5. The digital broadcast receiving apparatus according to claim 1, wherein the program information storage unit stores program information related to a broadcast service of the digital broadcast received by the broadcast receiving unit, and the program information storage unit stores the program information. Electronic program guide generating means for generating an electronic program guide from program information,
The electronic program guide generating means provides a re-transmission service by the BS according to the tuning information stored in the tuning information storage section when an operation input for displaying the electronic program guide is performed on the user operating means. A digital broadcast receiving apparatus which is recognized as a terrestrial digital broadcast service and displays an electronic program guide of the retransmission service as an electronic program guide of the terrestrial digital broadcast.

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