JP2013168971A - Broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible for a plurality of broadcast receivers to secure an equivalent reception characteristic by creating a frequency table which is hardly influenced by a change in the reception state of digital broadcasting.SOLUTION: A broadcast receiver system 1 is a system constructed by communicatively connecting a master broadcast receiver 10 and slave broadcast receivers 20-50. The master broadcast receiver 10 receives scan results transmitted by the slave broadcast receivers 20-50, and statistically creates a frequency table on the basis of the received scan results and its own scan result. Because the master broadcast receiver 10 holds the created frequency table and also transmits it to the slave broadcast receivers 20-50 to have them hold it, each broadcast receiver device 10-50 holds the same frequency table, and thereby secures an equivalent reception characteristic.

Description

  The present invention relates to a broadcast receiving apparatus capable of creating an optimum frequency table that is not easily affected by changes in reception conditions.

  Conventionally, a frequency table (receivable frequency table) has been used to receive terrestrial digital broadcasts (terrestrial digital television broadcasts), the contents of which specify the frequency corresponding to each channel (service_id) of terrestrial digital broadcasts It is a list (service list). Such a frequency table is created based on a scan result of an initial scan (search for all receivable channels at a reception point) performed when the broadcast receiving apparatus is first installed. In addition, after the initial scan, the broadcast receiver has a rescan function so that it can cope with new opening, installation of a new relay station, frequency repacking, relocation of the broadcast receiver once installed, etc. The table can be changed (updated) as appropriate (see Non-Patent Document 1 below).

  In addition, in MFN (Multi-Frequency Network: a network that assigns different frequencies to transmitting stations with overlapping service areas) in terrestrial digital broadcasting, there are areas that can receive different physical channels with the same network_id, but in that case Non-Patent Document 1 below describes that a channel having a good reception C / N (power ratio of received noise) or BER (Bit Error Rate) should be stored in the frequency network. . In addition, when the broadcast receiving apparatus is a mobile / portable type, it is assumed that the reception state of radio waves changes frequently. Therefore, it is also possible to store a plurality of frequency tables according to the region, reception state, etc. It is described in Non-Patent Document 1.

  On the other hand, in the following Patent Document 1, when there is a channel that could not be selected at the time of scanning and channel selection, the cause that could not be selected from the transmission information related to that channel is specified, and according to the specified cause An invention that excludes the channel from the channel selection target is disclosed. Also, in Patent Document 2 below, when the reception level of a receiving broadcast station is reduced in a mobile broadcast receiving device, the current position is detected, and the same as the receiving broadcast station is detected based on the detected position information. An invention that searches for a broadcasting station of an affiliate, switches to the frequency of the broadcasting station of the same affiliate that has been searched, and then returns to the frequency of the original broadcasting station again when the reception level of the switched broadcasting station decreases. It is disclosed.

Japan Radio Industry Association “Digital Terrestrial Television Broadcasting Operation Regulations” Technical data [online], ARIB TR-B14 4.7 edition (first volume) (1/2), [Search January 18, 2012], Internet <URL: http://www.arib.or.jp/tyosakenkyu/kikaku_hoso/hoso_gijutsu_number.html> JP 2005-5894 A JP 2007-215138 A

  The reception situation of terrestrial digital broadcasting may change due to various causes, and causes of the change include the above-described new opening, installation of a new relay station, frequency repacking, and the like. In addition to these, the causes of temporary changes in reception conditions include the start of construction work for new buildings, temporary construction of large-scale works, etc. It is also conceivable that the broadcast is temporarily stopped due to a device failure, or that the attenuation of the broadcast wave temporarily changes in accordance with the change in the amount of moisture in the air due to the influence of the weather or the season. Further, these various causes may be entangled in a complex manner to change the reception status.

  On the other hand, when a plurality of television devices are installed as broadcast receiving devices in a certain area, for example, in one building, a mobile or portable broadcast receiving device (for example, around it) (for example, If there is an information terminal device equipped with a television function) and each of these broadcast receiving devices is a single tuner, scanning cannot be performed while the user is viewing, so scanning (channel search) is performed individually at different timings. Will be done. Therefore, as described above, when the reception status changes (including a case where the reception status changes temporarily), the scan result in each broadcast receiving device differs depending on the timing of scanning, and the contents of the frequency table based on the scan result also differ from each other. Each broadcast receiving apparatus is different. As a result, various problems arise with respect to the reception of digital terrestrial broadcasts between a plurality of broadcast receiving apparatuses located nearby.

  For example, assuming a situation in which a new station has been opened, a broadcast receiving apparatus that has already performed scanning can tune to a new broadcast frequency related to the new opening, but a broadcast receiving apparatus that has not yet performed scanning has a new Since the presence of the broadcast frequency cannot be recognized, there is a problem that a device that can be tuned to a new broadcast frequency and a device that cannot be tuned are generated between nearby broadcast receiving devices. In this case, as long as one user can view these broadcast receiving apparatuses as appropriate, one broadcast receiving apparatus can watch a TV program with a new broadcast frequency, and another broadcast receiving apparatus has a new one. Since it becomes a situation that a television program of a broadcast frequency cannot be seen, there is a possibility of giving a user a misunderstanding that a broadcast receiving apparatus that cannot watch a television program of a new broadcast frequency has failed.

  In addition, the reception status changes temporarily, and normally the broadcast wave of a channel that can be received well is temporarily stopped and cannot be received, instead, it is broadcast from a remote relay station that is difficult to receive normally Assuming that the broadcast receiver scans in a situation where the wave can be received accidentally due to down-fading or up-fading accompanying stoppage, in this case, the frequency of broadcast waves that can be received normally is normal A broadcast wave that is difficult to receive without being reflected on the table is placed on the frequency table. As a result, even if the reception situation that was temporarily stopped returns to the original state, this broadcast receiving apparatus will be synchronized with the broadcast wave that is farther than usual, and the reception of good TV broadcasts will be hindered. Occurs.

  The present invention has been made in view of such circumstances, and one of a plurality of broadcast receiving apparatuses connected to be communicable is a master broadcast receiving apparatus, and the rest is a slave broadcast receiving apparatus. Then, the scan results of each broadcast receiving device are aggregated into the master broadcast receiving device, a frequency table is created based on the aggregated scan results, and the same frequency table is held in all broadcast receiving devices, It is an object of the present invention to provide a broadcast receiving apparatus that can reduce the influence of changes in reception conditions and ensure good TV broadcast reception.

  In order to solve the above-described problems, a broadcast receiving apparatus system according to the present invention includes a receiving unit that receives a digital broadcast based on a frequency table, and a scanning unit that sequentially scans at a frequency corresponding to each channel of the digital broadcast. In a broadcast receiving device system in which a plurality of broadcast receiving devices connected to each other are communicably connected, one broadcast receiving device among the plurality of broadcast receiving devices is a master broadcast receiving device and the remaining other broadcast receiving devices The apparatus is a slave broadcast receiving device, and the slave broadcast receiving device includes means for transmitting a scan result including information on a receivable frequency determined by scanning to the master broadcast receiving device, The master broadcast receiving device receives the scan result transmitted from the slave broadcast receiving device and its own scan. A determination means for determining a frequency to be received, a table creation means for creating a frequency table including information relating to the determined frequency to be received, and transmitting the created frequency table to the slave broadcast receiving device. And means for performing.

  A method according to the present invention is a broadcast receiver system in which a plurality of broadcast receivers that receive a digital broadcast based on a frequency table and perform scanning in synchronization with a frequency corresponding to each channel of the digital broadcast are communicably connected. In the frequency table creating method for creating the frequency table, one broadcast receiving device among the plurality of broadcast receiving devices is a master broadcast receiving device, and the remaining other broadcast receiving devices are slave broadcast receiving devices. The slave broadcast receiving device includes a step of transmitting to the master broadcast receiving device a scan result including information relating to a receivable frequency determined by scanning, and the master broadcast receiving device includes: Based on the scan result transmitted from the slave broadcast receiver and its own scan result. Determining a frequency to be received, creating a frequency table including information on the determined frequency to be received, and transmitting the created frequency table to the slave broadcast receiving device. It is characterized by.

  A broadcast receiving apparatus according to the present invention includes a receiving means for receiving a digital broadcast based on a frequency table, a scanning means for sequentially scanning at a frequency corresponding to each channel of the digital broadcast, an external broadcast receiving apparatus, In a broadcast receiving device comprising communication means for communicating, a scan result including information relating to a receivable frequency found by scanning to an external broadcast receiving device, and a scan result according to the transmission of the scan result Comprising: a means for receiving a frequency table from an external broadcast receiving apparatus as a transmission destination; and an updating means for updating the frequency table to the received frequency table.

The broadcast receiving apparatus according to the present invention includes means for receiving a scan instruction from an external broadcast receiving apparatus, and transmits the scan result when the scan instruction is received. .
Furthermore, the broadcast receiving apparatus according to the present invention is characterized in that the scan result is transmitted in association with the time of scanning.
Furthermore, the broadcast receiving apparatus according to the present invention includes position information detection means for detecting position information, and transmits the scan result in association with the position information detected by the position information detection means. It is characterized by.

  A broadcast receiving apparatus according to the present invention includes a receiving means for receiving a digital broadcast based on a frequency table, a scanning means for sequentially scanning at a frequency corresponding to each channel of the digital broadcast, an external broadcast receiving apparatus, In a broadcast receiving device comprising communication means for communicating, means for receiving a scan result including information relating to a receivable frequency transmitted from an external broadcast receiving device, and the received scan result and its own scan result Based on the determination means for determining the frequency to be received, the table creation means for creating a frequency table including information on the determined frequency to be received, and the external frequency source of the received scan result Means for transmitting to the broadcast receiving apparatus.

Further, the broadcast receiving apparatus according to the present invention is characterized in that when there are a plurality of external broadcast receiving apparatuses, the broadcast receiving apparatus includes means for transmitting a scan instruction at a different time for each external broadcast receiving apparatus.
Furthermore, the broadcast receiving apparatus according to the present invention receives the scan result in association with the scan time, and determines the scan result belonging to one time zone based on the scan time. And means for adding weights to scan results belonging to one time zone, wherein the determining means determines a frequency to be received based on a plurality of scan results including the weighted scan results. It is made to do so.

Furthermore, the broadcast receiving apparatus according to the present invention is configured to receive the scan result in association with position information, and when receiving a plurality of scan results, the position information is associated with the scan result and position information. When the position information that is not associated with the position information is received, a weight is added to the scan result that is not associated with the position information, and the determination means includes a plurality of scans including the weighted scan result. The frequency to be received is determined based on the result.
In the broadcast receiving apparatus according to the present invention, the determining unit may determine a frequency to be received in order of decreasing receivable frequencies included in a plurality of scan results from frequencies corresponding to the same channel. It is characterized by that.

  In the present invention, the slave broadcast receiving apparatus transmits the scan result to the master broadcast receiving apparatus, and the master broadcast receiving apparatus uses the received scan result and its own scan result to calculate statistics from a plurality of scan results. Since the frequency table is created by determining the channel to be received based on the contents obtained and transmitted to the slave broadcast receiver, the frequency table used for reception is the master and slave all broadcasts. Common to receiving devices.

  Therefore, since the frequency table in each broadcast receiving device becomes the same, when there is a new opening, one broadcast receiving device can tune to a new broadcasting frequency related to the new opening, but another broadcast receiving The apparatus can prevent a situation in which it cannot be tuned to the new broadcast frequency. In addition, since scanning in each broadcast receiving device is performed at different timings depending on the user's viewing situation etc., the frequency table created is also statistically averaged reflecting the scan results of different time zones. Therefore, the contents of the frequency table that is made common are not easily affected by a temporary change in reception status.

  In the present invention, one broadcast receiving apparatus (for example, a master broadcast receiving apparatus) transmits a scan instruction to another broadcast receiving apparatus (slave broadcast receiving apparatus). By receiving the scan instruction, the scan is performed and the scan result is transmitted to one broadcast receiving apparatus. Therefore, if another broadcast receiving apparatus is configured to perform scanning based on a scan instruction and transmit a scan result, the scanning timing of the other broadcast receiving apparatus can be controlled by one broadcast receiving apparatus.

  Therefore, if one broadcast receiving device transmits a scan instruction at a different time for each of the other broadcast receiving devices, a frequency table can be created based on the scan results at various times, and temporary changes in the reception status The influence by can be further reduced. Also, the scan instruction can be used as a reminder by one broadcast receiving apparatus to a slave broadcast receiving apparatus that does not send a scan result.

  In the present invention, the other broadcast receiving devices transmit the scan time in association with the scan results, so that one broadcast receiving device displays the received scan results and its own scan results according to time zones. It is also possible to determine the frequency to be received after adding weighting to the scan results belonging to a specific time zone. As a result, if a specific time zone is set to a time zone in which the change in the reception status is unlikely to occur, an optimum frequency table that is less likely to be affected by the change in the reception status can be created.

  Further, in the present invention, at least one of the other broadcast receiving apparatuses includes a position information detecting unit, and the broadcast receiving apparatus including the position information detecting unit transmits the detected position information in association with the scan result. If one of the received scan results includes position information, the broadcast receiving apparatus can determine a channel to be received by adding a weight to the scan result not including the position information. Become. Accordingly, it is possible to determine the frequency to be received with emphasis on the scan result of the fixed (installation type) broadcast receiving apparatus that transmits the scan result not including the position information.

  That is, the fixed broadcast receiving apparatus generally does not include the position information detecting means, and the mobile / portable broadcast receiving apparatus normally includes the position information detecting means, so that the scan result not including the position information is weighted as described above. If this is added, the scan result of the fixed broadcast receiving apparatus will be emphasized. And since the reception status of mobile / portable broadcast receivers changes frequently with movement, the reception status of fixed broadcast receivers tends to be more stable. If importance is attached to the scan results of fixed broadcast receivers, it is possible to determine the frequency to be received by reducing the influence of frequent reception conditions associated with movement, thereby creating an optimal frequency table. .

Furthermore, in the present invention, the frequencies to be received are determined in the order of the highest frequency that can be received in accordance with the same channel included in the scan result. Accordingly, the frequency table can be created with a simple processing algorithm based on the statistically obtained result in the majority order.

  In the present invention, each device has the same frequency table created based on the scan results of the master broadcast receiving device (one broadcast receiving device) and the slave broadcast receiving device (other broadcast receiving device). As a result, an optimum frequency table in which the influence of the change in the reception status is reduced can be created in the area range where each device is located, and the situation where the channels that can be received differ among the devices can be prevented.

  In the present invention, in response to a scan instruction transmitted by one broadcast receiving device (master broadcast receiving device), other broadcast receiving devices (slave broadcast receiving devices) transmit scan results. A frequency table can be created without delay based on a plurality of scan instructions.

  Furthermore, in the present invention, each broadcast receiving device scans at different times and creates a frequency table based on such scan results, so avoid the influence of time zones where reception conditions tend to change. An optimal frequency table can be created.

  Furthermore, according to the present invention, the scan time is associated with the scan result, each scan result is discriminated by time zone, and the frequency table is created by adding weight to the scan result belonging to the specific time zone. Therefore, it is possible to create a frequency table with content that emphasizes scan results in a specific time zone, and if the time zone in which the reception status does not easily change is set as the specific time zone, it contributes to the creation of a stable frequency table it can.

  Further, in the present invention, if there is a scan result associated with position information in the scan result, a channel to be received is determined by adding weight to the scan result not associated with the position information. Basically, it is possible to determine the frequency to be received by placing importance on the scan results of fixed broadcast receivers that are not easily affected by changes in the reception status. Can be created.

Furthermore, in the present invention, the frequencies to be received are determined in the order of the highest receivable frequencies included in the scan result. Therefore, the optimum frequency table is created by determining the frequencies to be received in a majority manner. it can.

It is the schematic which shows the whole structure of the broadcast receiver apparatus system which concerns on embodiment of this invention. It is a block diagram which shows the internal structure of a fixed-type broadcast receiver. (A) is the schematic which shows a 1st menu image, (b) is the schematic which shows the image during a synchronization which is an example of an OSD image. (A) is a chart which shows the example of a frequency table, (b) is a conceptual diagram which shows the flow in which a frequency table is produced based on several scan results. (A) is a chart which shows the example of the scanning result by a fixed broadcast receiver, (b) is a chart which shows the example of the scanning result by a mobile and portable broadcast receiver. It is the schematic which shows a frequency change notification screen. It is a block diagram which shows the internal structure of a mobile broadcast portable receiver. It is a flowchart which shows the process sequence in the master and slave broadcast receiver which concerns on the frequency table preparation method. It is a flowchart which shows a part of process sequence which concerns on the frequency table preparation method of a modification.

  FIG. 1 is a schematic diagram showing an overall configuration of a broadcast receiving apparatus system 1 according to an embodiment of the present invention. The broadcast receiver system 1 of this embodiment includes a total of three fixed broadcast receivers 10, 20, and 30 installed in a building, and a total of two mobile / mobile broadcast receivers 40 and 50. It is configured to be communicable. These five broadcast receiving apparatuses 10, 20, 30, 40, and 50 function as television apparatuses, and can receive a digital terrestrial broadcast signal and display a program of each channel. In the present embodiment, one of the five broadcast receiving apparatuses 10, 20, 30, 40, and 50, which is installed in the building, is broadcasted as a master by a user setting described later. In addition to the receiving device (one broadcast receiving device), the remaining broadcast receiving devices 20, 30, 40, and 50 are slave broadcast receiving devices (other broadcast receiving devices).

  Broadcast receiving apparatuses 10, 20, and 30 installed in a building share an antenna provided in the building, and an antenna cable extending from the antenna is connected to each of the broadcast receiving apparatuses 10, 20, and 30. Further, these broadcast receiving apparatuses 10, 20, and 30 are connected to each other by a communication cable based on a well-known communication standard (for example, a LAN standard by IEEE or the like, a standard by DLNA or the like), and the broadcast receiving apparatuses 10, 20 and 20 are connected. , 30 can communicate with each other (in FIG. 1, illustration of a router or a DLNA server or the like is omitted for connection with a communication cable). In addition to wired communication, the broadcast receiving apparatuses 10 to 30 may be connected by wireless communication in accordance with a well-known wireless communication standard (for example, a wireless LAN standard such as IEEE or Bluetooth (registered trademark)). Is possible.

  The mobile / portable broadcast receivers 40 and 50 are information terminal devices that can be provided with various functions by installing various application software in addition to a telephone function called a so-called smartphone. Built-in tuner, demodulator, decoder, etc. necessary for digital broadcast reception. The mobile / portable broadcast receivers 40 and 50 are known wireless communication standards (for example, wireless LAN standards such as IEEE or Bluetooth (registered trademark)) or known infrared standards (IrDA-based standards, for example). IrSS, etc.) can be wirelessly connected to the fixed broadcast receivers 10, 20, and 30.

  FIG. 2 is a block diagram showing a main internal configuration of the master broadcast receiving apparatus 10. Since the master broadcast receiving apparatus 10 is structurally equivalent to the other fixed broadcast receiving apparatuses 20 and 30 serving as slaves, the master broadcast receiving apparatus 10 represents these fixed broadcast receiving apparatuses. The internal configuration of the devices 10, 20, and 30 will be described.

  The broadcast receiving apparatus 10 includes a preprocessing unit 11, a decoding unit 12, an infrared processing unit 13, a control unit 14, a first memory 15a, a second memory 15b, a communication unit 16a, a wireless communication unit 16b, a display output processing unit 17, and The audio output processing unit 18 and the like are connected by the internal connection line 10a. Each unit 11 described above transmits and receives signals to and from the control unit 14 through the internal connection line 10a. Each unit 11 transmits a signal indicating the current processing status to the control unit 14, and the control unit 14 The current processing status is ascertained based on the processing status transmitted from each section 11 and the like, and a control signal for controlling the next processing according to the grasped status is sent to each section 11 and the like. Hereinafter, details of each unit 11 and the like of the broadcast receiving apparatus 10 will be described.

  First, the preprocessing unit 11 corresponds to a reception unit for terrestrial digital broadcasting, and receives an RF signal (broadcast signal) acquired by an antenna and carried by an antenna cable, and includes a tuner unit 11a, an A / D conversion unit 11b, An orthogonal detection unit 11c, an FFT unit 11d, and a demodulation unit 11e are included. The tuner unit 11a of the preprocessing unit 11 receives an RF signal from an antenna cable, and converts the RF signal into an IF signal by performing frequency conversion based on a predetermined frequency according to the control of the control unit 14. Then, the data is transmitted to the A / D converter 11b. The A / D converter 11b converts the transmitted IF signal from an analog signal to a digital signal, and transmits the signal to the quadrature detector 11c. The quadrature detection unit 11c converts the transmitted digital signal into a baseband signal and transmits the baseband signal to the FFT unit 11d. The FFT unit 11d performs Fourier transform on the transmitted signal and transmits the signal to the demodulation unit 11e. The demodulator 11e performs equalization processing and error correction processing on the transmitted signal, converts the signal into a transport stream (TS), and transmits the transport stream (TS) to the decoding unit 12 that performs the next processing.

  The decoding unit 12 performs a decoding process on the transport stream demodulated by the preprocessing unit 11 and separates it into video, audio, and other data. Further, the decoding unit 12 performs video decoding processing on the separated video stream and outputs it to the display output processing unit 17, and performs audio decoding processing on the separated audio stream and outputs it to the audio output processing unit 18. To do.

  The display output processing unit 17 performs processing necessary for a predetermined video display to generate a video signal, and outputs the generated video signal to the display panel 10b, whereby the display panel 10b has a channel associated with a predetermined frequency. The video of the broadcast program corresponding to is displayed. The audio output processing unit 18 performs predetermined processing necessary for audio output such as amplification to generate an audio signal, and outputs the generated audio signal to the speaker 10c, so that the speaker 10c outputs a predetermined frequency. The sound of the broadcast program corresponding to the channel related to is output.

  On the other hand, as a part related to the interface system, the infrared processing unit 13 performs communication processing (signal / data transmission / reception processing) in accordance with a known infrared standard (for example, each standard of IrDA system). Then, a process of receiving an infrared ray including an operation signal emitted from the remote control device 10d that receives an operation from the user and transmitting the received infrared signal to the control unit 14 is performed. The infrared processing unit 13 also functions as a communication unit, can communicate with an information terminal device equipped with an infrared communication function, receives signals and data sent from the information terminal device, and receives these information terminal devices. Signals, data, etc. can also be transmitted based on the control instruction of the control unit 14.

  The control unit 14 plays a central role in executing various functions of the broadcast receiving device 10, and based on various processing contents defined in the program P stored in the first memory 15a. It functions as various means, and details will be described later.

  The broadcast receiving apparatus 10 includes a first memory 15a and a second memory 15b as memories (storage media), and the first memory 15a is basically a program (program, Menu image, OSD image, device identification information, etc.), while the second memory 15b is data generated after the user starts using it, for example, various data obtained through broadcasting, Tables (PAT, PMT, etc.) and the like, and various data tables created with use by the user are stored (saved), and an example of the stored table is a frequency table T. Since the frequency table T includes frequency information corresponding to the channel to be received, when the pre-processing unit 11 receives a desired channel, the frequency table T is based on the frequency included in the frequency table T. Processing for tuning to the frequency of the other channel is performed.

  The program P stored in the first memory 15a corresponds to firmware, a system program, and the like. Various programs for the control unit 14 necessary for the broadcast receiving apparatus 10 to function as a television apparatus (existing functions) are used. In addition to defining the process, various new processes related to the present invention are also defined. Examples related to various processes for realizing the existing functions include a process for receiving a broadcast program in synchronization with a predetermined frequency, a process for video display / audio output for a broadcast program, and a process for scanning (channel search). is there. Various new processes related to the present invention will be described later together with details of the control unit 14.

  The image table G stored in the first memory 15a stores a large number of images for various menus, images for OSD, and the like. FIG. 3A shows a first menu image 2 which is an example of a plurality of menu images stored in the image table G. The first menu image 2 includes “(1) connection recognition”, “(2) master / slave setting”, “(3) scan (channel search)”, “(4) scan result synchronization”, and “(5) A plurality of items such as “device report” are selectably included. These items are selected by the user operating the cursor 2a and the up and down keys provided on the remote control device 10d, and the remote control device 10d. When the user operates the determination key provided in the item 2, it is determined that the item on which the cursor 2a is located has been selected. Thereby, the control part 14 starts the process according to the determined item.

  FIG. 3B shows a synchronized presentation image 3 which is an example of a plurality of OSD images stored in the image table G. For example, “(4) Scan result synchronization” is selected in the above-described first menu image 2 in FIG. 3A, and the synchronization presentation image 3 is synchronized between the broadcast receiving apparatuses 10 to 50. When the process is started, it is read from the first memory 15a during the process and displayed on the display panel 10b. By displaying such a synchronized presentation image 3, the user can obtain a scan result. It can be understood that the synchronization process is in progress.

  FIG. 4A shows an outline of the contents of the frequency table T stored in the second memory 15b. The frequency table T is created by the characteristic processing of the present invention. The frequency table T is created by the master broadcast receiving device 10 and then transmitted to the slave broadcast receiving devices 20 to 50, so that the broadcast receiving device is obtained. It is held by all broadcast receiving apparatuses 10 to 50 of the system 1. As shown in FIG. 4B, the frequency table T is created based on the scan result t1 of the master broadcast receiver 10 and the scan results t2 to t5 of the slave broadcast receivers 20-50.

  The frequency table T corresponds to the channel (ch), frequency, company name (broadcaster name), etc., as appropriate for each service_id (identification value assigned to each service; unique value in digital terrestrial television broadcasting nationwide). Using the frequency table T, the broadcast receiving apparatus 10 uses the frequency table T to set a preset for assigning a predetermined frequency to each channel to a one-touch button (number buttons 1 to 12) provided on the remote control device 10d. Thus, the pre-processing unit 11 can receive the broadcast station desired by the user with one touch.

  In addition to the frequency table T, the second memory 15b stores the scan result t1 that is the result of the scan process until the next scan process is performed based on the control instruction of the control unit 14 in addition to the frequency table T. It is like that.

  FIG. 5A is a chart showing an outline of the contents of the scan result t1. The scan result t1 includes reception state information for each frequency corresponding to the scanned service_id, and the included frequency is determined as a receivable frequency. The content of the reception status information is information indicating reception intensity (a numerical value of 0 to 255) and the like. Further, the scan result t1 of the present embodiment includes identification information of the broadcast receiving apparatus 10 and information on the date and time (time) when the scan is started in association with information such as the frequency. FIG. 5B shows a scan result t4 by the mobile / portable broadcast receiving apparatus 40. This scan result t4 is information such as the frequency that is the content of the scan result t1 shown in FIG. The position information (latitude / longitude) related to the place where the scan was performed in association with is included. This position information is detected by the position detector 49 as will be described later.

  Returning to FIG. 2, the description of the internal configuration of the broadcast receiving apparatus 10 will be continued. The communication unit 16a corresponds to a communication unit, and performs wireless communication processing based on a known communication standard (for example, a LAN standard by IEEE or the like, or a standard by DLNA or the like) according to the control of the control unit 14, and includes a communication cable. Can be connected. The wireless communication unit 16b also corresponds to a communication unit, and performs wireless communication processing according to control of the control unit 14 according to a known wireless communication standard (for example, a wireless LAN standard such as IEEE or Bluetooth (registered trademark)). Therefore, it is possible to connect to a device that performs communication mainly by radio, such as a mobile / portable information terminal device.

  Next, various control processing contents relating to the present invention performed by the control unit 14 will be described. First, the control unit 14 performs processing (connection recognition processing) for recognizing other devices to which the broadcast receiving device 10 can connect through communication in order to construct a system. This process is started when, for example, the item “(1) Connection Recognition” is selected by the user in the first menu image 2 shown in FIG. When the connection recognition process is started, the control unit 14 performs control to transmit a connection confirmation signal (connection confirmation signal) through the communication unit 16a.

  When receiving the connection confirmation signal, the other broadcast receiving devices 20 to 50 that receive the connection confirmation signal described above receive a connection confirmation signal including a signal indicating that the connection can be made together with their own identification information. Control to send a reply to the broadcast receiving apparatus 10 of the signal transmission source is performed.

  When the broadcast receiving apparatus 10 is the transmission source of the connection confirmation signal, the control unit 14 determines whether or not the connectable signal has been received within a predetermined time after the connection confirmation signal is transmitted, and the connectable signal is transmitted. Upon reception, the broadcast receiving device that has returned the connectable signal is recognized as a device included in the system, and processing for transmitting the recognized device configuration to a device included in another system is also performed.

  The control unit 14 also performs processing related to master / slave setting. In this embodiment, this processing is basically performed based on the user's manual setting, and the item “Master / Slave Setting” is selected by the user in the first menu image 2 shown in FIG. Then, in the menu image (not shown) that opens thereafter, when the master decision is selected by the user, the control unit 14 performs processing so that a flag for setting the broadcast receiving device 10 as the master is stored in the second memory 15b. Do. Thereafter, the control unit 14 transmits an instruction signal (slave setting signal) for setting a slave to the other broadcast receiving apparatuses 20 to 50 included in the system. And the other broadcast receiving apparatuses 20-50 which received this slave setting signal perform the process which sets itself to a slave (performs the process which memorize | stores the flag set to a slave).

  Further, when set as the master, the control unit 14 recognizes the number of broadcast receiving devices included in the system (five in FIG. 1 in total) and schedules the times at which each broadcast receiving device performs scanning. A (scan schedule) is created, and control is performed to transmit a scan instruction to the broadcast receiving apparatus at each time specified by the schedule. As an example of a specific scan schedule, first, the self (broadcast receiving device 10) scans at 0:30 on a day, and the fixed broadcast receiving device 20 scans at 3:00. , The mobile / portable broadcast receiver 40 scans at 6:00, the fixed broadcast receiver 30 scans at 9:00, and the mobile / portable mobile device at 12:00. A broadcast schedule is set so that the broadcast receiving apparatus 50 performs scanning, and a scan instruction is transmitted according to this schedule. The contents of such a scan schedule are also stored in the second memory 15b.

  The slave broadcast receiving apparatuses 20 to 50 that receive the scan instruction start scanning upon reception of the scan instruction, and when the scan ends, scan results t2 to t5 are generated, and the master broadcast receiving apparatus 10 to send. In this case, each control unit of the slave broadcast receiving devices 20 to 50 functions as a means for transmitting the scan result. In addition to the case described above, the scan is also started when the “scan (channel search)” item of the first menu image 2 in FIG. 3A is selected by the user (manual scan).

  The processing content of the scan itself is to search each channel (for example, 13ch to 62ch) of terrestrial digital broadcasting, and scan in synchronization with the frequency corresponding to each channel. At the time of scanning, the control unit 14 functions as a scanning unit, determines whether or not reception is possible for each frequency while referring to reception intensity of a tuned frequency, and includes information related to the determined receivable frequency. A scan result will be created.

  Further, as a table creation means, when all the scan results t1 to t5 are prepared, the control unit 14 creates a frequency table T by performing statistical processing based on these scan results t1 to t5 as described above. As a specific content of this process, the control unit 14 specifies a channel (in this process, service_id is equivalent) to be received by points (points). First, the tuning included in the scan results t1 to t5. 1 point is given to each frequency received (received).

  Then, the control unit 14 performs processing related to weighting addition, determines a scan result belonging to a non-night time zone (one time zone) based on the time associated with the scan results t1 to t5, and enters the non-night time zone. As a weighting addition to the scan result to which it belongs, a process of multiplying the previously assigned 1 point by 1.5 is performed. In this embodiment, the night time zone is in the range of 0:00 to 4:59, and 18:00 to 24:00, and the non-night time zone is in the range of 5:00 to 17:59. Note that these time zones are examples, and the time ranges of the night time zone and the non-night time zone can be appropriately set according to the situation.

  In the scan schedule described above, the scan result t1 of the master broadcast receiver 10 that scans at 0:30 and the scan result t2 of the slave broadcast receiver 20 that scans at 3:00 belong to the night time zone. Therefore, each point given to other scan results t3 to t5 is multiplied by 1.5. The reason for performing weighting according to such a time zone is that, in general, the nighttime zone is often subjected to construction work and the reception status is often worse than that in other time zones. In addition, when performing weighting according to such a time zone, the control unit 14 determines the target to be weighted with reference to the time of the scan date and time included in each scan result t1 to t5.

  Furthermore, the control part 14 performs the process which multiplies the point which concerns on the scanning results t1-t3 by the fixed broadcast receiving apparatuses 10-30 by 1.5 as a further weighting addition. Such weighting is performed by weighting the scan results t1 to t3 not including the position information after the control unit 14 determines whether or not the position information is associated with the scan results t1 to t5. become.

  The process related to the above points will be described with a specific example. As an example, it is assumed that “xxx.01” is described as a frequency that can be tuned (received) with respect to service_id 01 in the scan result t1. Hereinafter, “xxx.55” is described in the frequency of service_id 01 in the scan result t2, “xxx.55” is described in the frequency of service_id 01 in the scan result t3, and the frequency of service_id 01 in the scan result t4 is It is assumed that “xxx.55” is described, and “xxx.01” is described in the frequency of service_id 01 in the scan result t5.

  First, since 1 point is given to each frequency, “frequency“ xxx.01 ”of service_id 01 of scan result t1” = “1 (meaning of point; the same applies hereinafter)”, “service_id of scan result t2” 01 frequency “xxx.55” ”=“ 1 ”,“ service_id 01 frequency “xxx.55” ”=“ 1 ”of scan result t3,“ frequency “xxx.55” of service_id 01 of scan result t4 ”= “1”, “frequency“ xxx.01 ”of service_id 01 of scan result t5” = “1”.

  Next, by the weighting relating to the time zone, “frequency“ xxx.55 ”of service_id 01 of scan result t3” = “1.5”, “frequency“ xxx.55 ”of service_id 01 of scan result t4” = “1” .5 ”,“ frequency “xxx.01” of service_id 01 of scan result t5 ”=“ 1.5 ”, and the point related to service_id 01 of scan results t1 and t2 remains“ 1 ”.

  Then, “frequency“ xxx.01 ”of service_id 01 of scan result t1” = “1.5”, “frequency“ xxx.55 ”of service_id 01 of scan result t2” = “1.5”, “frequency“ xxx.55 ”of service_id 01 of scan result t3” = “2.25”. It should be noted that “frequency“ xxx.55 ”of service_id 01 of scan result t4” = “1.5”, and “frequency“ xxx.01 ”of service_id 01 of scan result t5” = “1.5”.

  Then, after adding weighting as described above, the control unit 14 calculates the sum of points for each frequency. In the above example, the frequency “xxx.01” = “1, 5 (scan result t1) Point) ”+“ 1.5 (point of scan result t5) ”=“ 3.0 ”, and frequency“ xxx.55 ”=“ 1.5 (point of scan result t2) ”+“ 2.25 ( The sum of “point of scan result t3)” + “1.5 (point of scan result t4)” = “5.25” is obtained.

  Finally, the control unit 14 performs point comparison. In the above case, the frequency “xxx.55” is higher than the frequency “xxx.01” (5.25> 3.0). ), The control unit 14 performs a process of determining the frequency to be received for service_id 01 (corresponding to one channel) as “xxx.55” as a determination unit.

  Further, as a scan result on a different day from the above, “xxx.01” is described in the frequency of service_id 01 in the scan result t1, and “xxx.01” is described in the frequency of service_id 01 in the scan result t2. “Xxx.55” is described in the frequency of service_id 01 in the scan result t3, “xxx.55” is described in the frequency of service_id 01 in the scan result t4, and “ xxx.01 "is described.

  In the case of this day, each point is initially given, and “frequency_xxx.01” of “service_id 01 of scan result t1” = “1” and “service_id 01 of scan result t2” by weighting according to the time zone. Frequency “xxx.01” ”=“ 1 ”,“ frequency “xxx.55” of service_id 01 of scan result t3 ”=“ 1.5 ”,“ frequency “xxx.55” of service_id 01 of scan result t4 ”= “1.5”, “frequency“ xxx.01 ”of service_id 01 of scan result t5” = “1.5”.

  Then, “frequency“ xxx.01 ”of service_id 01 of scan result t1” = “1.5”, “frequency“ xxx.01 ”of service_id 01 of scan result t2” = “1.5”, “frequency“ xxx.55 ”of service_id 01 of scan result t3” = “2.25”, and “weight of service_id 01 of scan result t4“ xxx.55 ”” without weighting = “1.5”, “frequency“ xxx.01 ”of service_id 01 of scan result t5” = “1.5”.

  Then, the control unit 14 calculates the frequency “xxx.01” = “1, 5 (point of the scan result t1)” + “1.5 (point of the scan result t2)” + “1 as the sum of the points for each frequency. .5 (point of scan result t5) ”=“ 4.5 ”and frequency“ xxx.55 ”=“ 2.25 (point of scan result t3) ”+“ 1.5 (point of scan result t4) ) ”=“ 3.75 ”. In this case, since the frequency “xxx.01” has a higher point than the frequency “xxx.55” (4.5> 3.75), the control unit 14 uses service_id 01 (one (Corresponding to the channel) is determined to be “xxx.01” as the frequency to be received. Note that the multiple “1.5” related to weighting is an example, and it is of course possible to use a different multiple depending on the situation.

  The control unit 14 determines the frequency to be received (to be tuned) according to each channel (service_id) by performing the above-described frequency determination on all service_ids to be scanned, and determines the content of the determined content. A frequency table T including information is created. Then, the control unit 14 compares the determined frequency table T with the frequency table from the previous scan stored in the second memory 15b, and if the content is different, the previous frequency table is replaced with a new frequency. An update process of replacing with the table T is performed (a process of deleting the previous frequency table and storing a new frequency table T).

  In addition, when the control unit 14 is updated to a new frequency table T, as a means for transmitting the frequency table, the control unit 14 performs a process of transmitting the frequency table T to the slave broadcast receiving devices 20 to 50, and the slave broadcast receiving device. In 20 to 50, when the frequency table T is received, the previous frequency table is replaced with the new frequency table T and updated (in this case, the control unit of the slave broadcast receiving devices 20 to 50 receives the frequency table T). And functions as a means for updating the frequency table T). As a result of such processing, each of the broadcast receiving apparatuses 10 to 50 holds a common frequency table T, and these common frequency tables T have equivalent reception characteristics, so that broadcast stations that can be received, etc. No difference occurs.

  When the frequency table is updated in this way, the control unit 14 performs display processing of the frequency change notification screen 4 as shown in FIG. 6 and presents to the user that the frequency has been changed. The frequency change notification screen 4 is also displayed when the item “(5) Device Report” on the first menu screen 2 in FIG. 3A is selected by the user.

The contents of various processes (control processes) performed by the control unit 14 described above are defined by the program P stored in the first memory 15a of FIG. The slave fixed broadcast receiving devices 20 and 30 have the same configuration as that of the master broadcast receiving device 10 described above in the part related to the present invention, and are controlled by the master broadcast receiving device 10 as slaves. Will work. Furthermore, the slave mobile / portable broadcast receivers 40 and 50 have basically the same configuration as that of the master broadcast receiver 10 described above, except that a position detection unit is provided. Is mentioned.

  FIG. 7 shows a main internal configuration of the mobile / portable broadcast receiving apparatus 40, which is almost the same as the fixed broadcast receiving apparatus 10 shown in FIG. The difference is that the position detection unit 49 is provided. The position detection unit 49 functions as position information detection means, and performs processing related to GPS (Global Positioning System). The position detection unit 49 receives a signal from an artificial satellite for GPS and obtains current position information (latitude and longitude information). You can get it. For this reason, the program P ′ stored in the first memory 15a of the broadcast receiving apparatus 40 includes the processing content related to the position detection process by the position detection unit 49, and the control unit 44 detects the position along with the scan process. Processing is also performed so that position information is included in the scan result t4 (see FIG. 5B). The acquired position information is appropriately stored in the second memory 15b. The same applies to the other mobile / portable broadcast receiving apparatus 50.

  The flowchart shown in FIG. 8 shows the processing procedures of the master broadcast receiving apparatus 10 and the slave broadcast receiving apparatuses 20 to 50 as a frequency table creation method by arranging the above-described contents. Hereinafter, based on this flowchart, the flow of creation of the frequency table T in the broadcast receiving system 1 will be described. This flowchart assumes that the device recognition process, master / slave setting process, and previous scan process included in the system have been completed. It is assumed that the frequency table is stored. In this flowchart, it is assumed that the master broadcast receiving apparatus 10 issues a scan instruction according to the scan schedule of the above-described example, and the scan by the master broadcast receiving apparatus 10 itself has already been completed.

  First, the master broadcast receiving apparatus 10 determines whether a start condition is satisfied (S1). In this flowchart, the start condition is whether the current time is the time of the scan schedule (3:00, 6:00, 9:00, 12:00) of the master broadcast receiving apparatus 10 The control unit 14 makes a determination in comparison with the time counted by the built-in clock function. If the start condition is not satisfied, that is, if the current time has not reached any time in the scan schedule (S1: NO), the condition is waited for.

  When the start condition is satisfied, that is, when the current time reaches any time in the scan schedule (S1: YES), the control unit 14 of the master broadcast receiving apparatus 10 then sends all slaves. It is determined whether the scan results of the broadcast receiving devices 20 to 50 are received (S2). If all the scan results have not been received (S2: NO), the master broadcast receiving device 10 broadcasts the slave corresponding to the time coincident in the scan schedule at the stage of S1, based on the control of the control unit 14. A scan instruction is transmitted to the receiving device (for example, the broadcast receiving device 20 if the current time is 3:00) (S3). After transmitting the scan instruction, the process returns to the step S1 again, and the master pavement receiving apparatus 10 waits for the next start condition to be established.

  On the other hand, the slave broadcast receiving device (for example, the broadcast receiving device 20 receiving a scan instruction at 3:00) determines whether or not the start condition for the slave is satisfied (S10). In this case, the establishment of the start condition needs to satisfy two conditions: reception of a scan instruction and no use of a tuner unit (not watching a broadcast program). When the start condition is not satisfied, for example, when the current time is before 3:00 or when the user is watching (S10: NO), the start condition is awaited. When the start condition is satisfied (S10: YES), the slave broadcast receiving device (for example, the broadcast receiving device 20) scans (S11), creates a scan result (for example, the scan result t2), and creates the master. Transmit to the broadcast receiving apparatus (S12).

  The master broadcast receiving apparatus 10 repeats the processes of S1 to S3 in the master broadcast receiving apparatus 10 and the processes of S10 to S12 in the slave broadcast receiving apparatus 20 and the like, so that the master broadcast receiving apparatus 10 is slave broadcast receiving apparatuses 20 to 50. All the scan results t2 to t5 are received, and this corresponds to the case where all the scan results are received in the step S2 (S2: YES), and the process proceeds to the frequency table creation step (S4). At the stage of creating the frequency table, as described above, the control unit 14 performs a statistical calculation process based on the points for the scan results t1 to t5 including the scan result t1 and sets the service_id (equivalent to the channel) to be received. Corresponding frequencies are sequentially determined to create a frequency table T as shown in FIG.

  Then, the master broadcast receiving apparatus 10 compares the created frequency table T with the previously created frequency table and determines whether or not the contents match (S5). If the contents match (S5: YES), since there is no need to change the created frequency table T, "no update information" that informs the user that the update is not performed is transmitted to each of the slave broadcast receiving devices 20-50 (S6). ) The current frequency table creation process in the master broadcast receiving apparatus 10 is temporarily terminated.

  Also, when the created frequency table T is compared with the previously created frequency table and the contents do not match (S5: NO), the master broadcast receiving device 10 uses the created frequency table T as the slave broadcast receiving device. 20 to 50 (S7), the previous frequency table stored in the second memory 15b is replaced with the new frequency table T created this time and updated (S8).

  On the other hand, the slave broadcast receiving device (for example, the broadcast receiving device 20) determines whether or not the “no update information” is received after the scan result transmission (S12) (S13), and the “no update information” is displayed. When received (S13: YES), since the previous frequency table can be used as it is, the process of creating the current frequency table in the slave broadcast receiving apparatus is temporarily ended.

  If the “no update information” has not been received (S13: NO), the slave broadcast receiving device next determines whether or not the frequency table T sent from the master broadcast receiving device 10 has been received. (S14). When the frequency table T has not been received (S14: NO), the process returns to the step S13, and again waits for reception of “no update information” or reception of the frequency table T.

  When the frequency table T is received (S14: YES), the slave broadcast receiving apparatus replaces and updates the previous frequency table with the new frequency table T (S15). In each of the master and slave broadcast receiving apparatuses 10 to 50, when the frequency is updated to a new frequency table T (S8, S15), a frequency change notification screen 4 as shown in FIG. 6 is displayed to change the frequency to the user. Present that there was.

  When the processing of the above-described flowchart is completed, each of the master and slave broadcast receiving devices 10 to 50 holds a common frequency table T. Therefore, all the broadcast receiving devices included in the broadcast receiving device system 1 are Therefore, it is possible to prevent the occurrence of a situation in which a broadcast station that can be received by a broadcast receiving apparatus having the system cannot be received by another broadcast receiving apparatus of the system. In addition, the updated frequency table T is created based on a result of statistical determination based on points such as the scan time and whether or not the broadcast receiving apparatus is mobile / portable. It is possible to secure reception characteristics that are hardly affected by changes.

  The present invention is not limited to the above-described embodiment, and various modifications can be considered. For example, as a broadcast receiving device included in the broadcast receiving device system 1, a recording device capable of receiving a terrestrial digital television broadcast is applicable in addition to the television device. The number of broadcast receiving apparatuses included in the broadcast receiving apparatus system 1 is not limited to five, and a system can be constructed as long as two or more broadcast receiving apparatuses are used. In addition, as described above, as a broadcast receiving device used for system construction, only a fixed device or a mobile / portable device is used in addition to a case where a fixed device and a mobile / portable device are mixed. It is also possible to build a system with only

  Examples of fixed broadcast receiving devices that can be included in the broadcast receiving device system 1 include devices connected to the same router or the same DLNA server, devices connected by a shared antenna, and the like. In addition, as means for connecting these fixed broadcast receiving apparatuses so as to be communicable, in addition to the communication cable described above, if the broadcast receiving apparatus has a function of communicating with a shared antenna or a power line, the antenna line or the power line is provided. It is also possible to use.

  Furthermore, in order to include mobile / portable broadcast receivers in the system, the connection confirmation is performed as described above to determine whether these mobile / portable broadcast receivers can be recognized. In order to prevent self-moving / portable broadcast reception disputes from being taken into a system such as a fixed broadcast receiver installed in Thus, it is preferable to determine whether or not to include in the system. Specifically, if the device that was recognized at the time of connection confirmation when the system was first constructed via the communication network was a mobile / portable broadcast receiving device, the mobile device could recognize the acquisition of location information.・ A request is made to the portable broadcast receiving device, and the position information sent by the request is compared with its own position, and the position of the mobile / portable broadcast receiving device that can be recognized is around its own position. Determine if there is. By this determination, it can be determined that the mobile / portable broadcast receiving apparatus that has been recognized should not be included in the system in terms of location or the owner's relationship, and irrelevant apparatuses can be excluded based on the determination result.

  In determining whether to include the mobile / portable broadcast receiving apparatus in the system, for example, in order to provide an operation opportunity that the user can actively determine, the first connection recognition is performed by infrared communication (IrSS or the like). ), It is preferable that the dialog screen can be displayed so that it can be determined whether or not the recognized mobile / portable broadcast receiving apparatus is included in the system. In addition, mobile / portable broadcast receivers also recognize the location information of their systems if they recognize a system built in a fixed broadcast receiver as the connection destination during initial connection recognition. If it is detected by the detection unit 49 and stored in the second memory 15b, it is possible to smoothly perform the connection process when performing connection recognition again at that location.

  In the above-described embodiment, the master / slave setting is manually made by selecting the item “(2) Master / slave setting” in the first menu image 2 in FIG. However, it is also possible to introduce an algorithm that automatically compares the processing capabilities of the control units, etc., and automatically sets the broadcast processing device with the highest processing capability as the master during the initial connection recognition. It is. At this time, there are two methods that can be set as a master: a method that is limited to a fixed broadcast receiving device, or a method that targets all broadcast receiving devices included in the system as a master. You may apply.

  In other words, when a fixed broadcast receiving device is first set as a master, it becomes easier to respond flexibly even if the number of devices constituting the system increases or decreases, and recognition of devices included in the system in terms of time Etc. will be performed smoothly. In addition, if the setting target of the master is not limited, a smartphone with high processing capability can be set as a master as a mobile / portable broadcast receiver, and if the broadcast receiver included in the system is fluid, it can be moved -If a portable broadcast receiving apparatus is set as a master, it becomes possible to respond flexibly. If the system configuration is fluid, the information about the system is temporarily stored in the mobile / portable broadcast receiving device. It becomes easier to cope with changes in the system configuration.

  Further, in the above-described embodiment, the clock function incorporated in the control unit 14 of the master broadcast receiving apparatus 10 determines whether the current time is the time of the scan schedule as a trigger for starting the process of creating the frequency table T. However, the processing may be started manually by the user. When the processing is started manually, the user manually selects and determines the item “(4) Scan result synchronization” in the first menu image 2 in FIG. Upon selection, a scan instruction is sent from the master broadcast receiving device 10 to each of the slave broadcast receiving devices 20 to 50, and the slave broadcast receiving devices 20 to 50 send the scan results to the master broadcast receiving device 10. (If the scan has not been performed, the scan result is sent after the scan is performed).

  Furthermore, in addition to the above-described scan schedule, the trigger for automatically starting the frequency table T creation process is performed when each broadcast receiving device 10-50 included in the system performs a scan, The processing may be started when the frequency table stored at the time is compared and it is detected that the frequencies corresponding to the service_id (corresponding to the channel) to be received are different. In this case, if it is the master broadcast receiving apparatus that detects that the frequencies are different, this corresponds to the case where the start condition in the flowchart of FIG. 8 is satisfied (S1: YES). When the slave broadcast receiving devices 20 to 50 detect that the frequencies are different, the slave broadcast receiving device transmits a request signal for requesting the start of processing to the master broadcast receiving device 10. In this case, reception of the request signal by the master broadcast receiving apparatus 10 corresponds to the case where the start condition in the flowchart of FIG. 8 is satisfied (S1: YES).

  Furthermore, even when the frequency table T creation process is automatically started as described above, if each broadcast receiving device 10-50 includes a single pre-processing unit 11 (tuner unit 11a), there is a scan instruction. However, if the user is viewing (or recording), the scan cannot be performed, and the scan is performed after the end of the user's viewing and the like. As described above, it is possible to start the processing without providing a scan schedule. In this case, each of the broadcast receiving devices 10 to 50 is programmed to start scanning at the same time (for example, 0:30), but the user views at that time (0:30). Alternatively, if recording is being performed, programming is performed so that scanning starts after viewing or recording ends.

  The flow of processing in this case is shown in the flowchart of the modified example in FIG. In the flowchart of the modified example, the master broadcast receiving apparatus 10 determines whether or not the current time is the processing start time (for example, 0:30) as the start condition is satisfied (S1 ′), and reaches the processing start time. If not, the start condition is not satisfied (S1 ′: NO) and the condition is awaited. On the other hand, if the start condition is satisfied (S1 ′: YES), then the master broadcast receiving apparatus 10 determines whether or not all scan results have been received without transmitting a scan instruction (S2 ′). ). When all the scan results have not been received (S2 ′: NO), the scan result reception wait state is entered. When all the scan results have been received (S2 ′: YES), the next is the flowchart of FIG. The process proceeds to the step S4, and the subsequent processing in the master broadcast receiving apparatus 10 is the same as that after the step S4 in the flowchart of FIG. The master broadcast receiving apparatus 10 also performs scanning when the start condition is satisfied (S1 ′: YES). However, if the master broadcast receiving apparatus 10 is viewing or recording, the viewing or recording ends. A scan will be performed later.

  On the other hand, the slave broadcast receiving devices 20 to 50 first determine whether or not the start condition is satisfied (S10 ′). This start condition needs to satisfy two conditions that the current time is after the process disclosure time (for example, 0:30) and the user is not viewing or recording. When the scan start condition is not satisfied (S10 ′: NO), the condition waits for the condition to be satisfied. When the condition is satisfied (S10 ′: YES), scanning is performed (S11 ′), and then the scan result is broadcast to the master. The data is transmitted to the receiving device 10 (S12 '), and the subsequent processing in the slave broadcast receiving device is the same as the processing after the step S15 in the flowchart of FIG.

  In the flowchart of the modified example of FIG. 9, even if the master broadcast receiving apparatus 10 does not provide a scan schedule, the scan time is appropriately distributed according to the use situation of the user, so that the processing load can be reduced. Preferred. When transmitting the scan result to the master broadcast receiving apparatus 10, an icon indicating that transmission is being performed is displayed at the corner of the screen so that the user can present that effect even while viewing, to indicate that transmission is in progress. It may be presented to the user.

  Note that, as in the modification shown in FIG. 9, even when the broadcast receiving devices 10 to 50 start scanning at the same time (at the same time), the master broadcast receiving device 10 is connected to each of the slave broadcast receiving devices 20. ˜50 may be simultaneously transmitted to establish a start condition and perform scanning. Such a scan instruction at the same time is particularly suitable for an apparatus that may cause a difference in reception status due to a change in position, such as the portable broadcast receiving apparatuses 40 and 50. Furthermore, it is possible to simultaneously transmit each scan instruction at a plurality of times at different times, thereby enabling a flexible response even when the reception status changes from moment to moment.

  In addition, as an algorithm for creating the frequency table T based on the scan results t1 to t5, a plurality of scan results t1 are used in the frequency corresponding to the same service_id (channel), in addition to adding the weight as described above. The frequency of service_id (channel) to be received may be determined in the order of the most receivable frequencies included in t5 (majority decision).

  For example, “xxx.01” is described in the frequency of service_id 01 in the scan result t1, “xxx.01” is described in the frequency of service_id 01 in the scan result t2, and the frequency of service_id 01 in the scan result t3 is When “xxx.55” is described, “xxx.55” is described in the frequency of service_id 01 in the scan result t4, and “xxx.01” is described in the frequency of service_id 01 in the scan result t5, Since the number of “xxx.01” is “3” and the number of “xxx.55” is “2”, the frequency to be received for service_id 01 is determined to be “xxx.01”. In this way, when the frequency to be received is determined by majority decision, the calculation of the points described above becomes unnecessary, so that the processing algorithm is simplified and the processing load on the control unit 14 can be reduced.

  In the above-described embodiments and modifications of the present invention, the creation of the frequency table has been described as an example. However, the processing target of the present invention is not limited to the creation of the frequency table. 1 is widely applicable to various settings related to the broadcast receiving apparatus, such as a communication network setting in FIG. 1, an image quality setting related to a television screen, a user preference setting, various ID settings, and a recording or viewing reservation setting. Further, for the various processing objects such as the frequency table, the above-described embodiments and modifications of the present invention include BS / CS digital broadcasting, CATV digital broadcasting, IP broadcasting (Internet broadcasting), terrestrial digital broadcasting, The present invention can be widely applied to various digital broadcasts such as regional wireless LAN broadcasts.

  Since the present invention statistically creates a frequency table used for digital broadcast reception based on the scan result of each broadcast receiving apparatus in a system in which a plurality of broadcast receiving apparatuses are communicably connected, reception conditions that vary in various ways It can be suitably used for creating a frequency table that is easy to handle.

DESCRIPTION OF SYMBOLS 1 Broadcast receiving system 10 Master broadcast receiving apparatus 11 Pre-processing part 12 Decoding part 14 Control part 15a 1st memory 15b 2nd memory 20-50 Slave broadcast receiving apparatus 49 Position detection part T Frequency table t1-t5 Scan result

Claims (4)

In a broadcast receiving apparatus comprising: receiving means for receiving digital broadcast; scanning means for sequentially scanning at a frequency corresponding to each channel of digital broadcast; and communication means for communicating with an external broadcast receiving apparatus;
A broadcast receiving apparatus comprising: means for transmitting a scan result including information relating to a receivable frequency found by scanning to an external broadcast receiving apparatus in association with a time at which the scan is performed. A means for receiving a scan instruction from an external broadcast receiver;
The broadcast receiving apparatus according to claim 1, wherein when the scan instruction is received, the scan result is transmitted. Position information detecting means for detecting position information is provided,
The broadcast receiving apparatus according to claim 1 or 2, wherein the scan result is transmitted in association with the position information detected by the position information detecting means. Means for receiving a slave setting signal from an external broadcast receiving device;
The broadcast receiving apparatus according to any one of claims 1 to 3, further comprising: a unit configured to store a flag to be set as a slave when the slave setting signal is received.

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