JPWO2019220573A1 - Broadcast receiver and broadcast reception method - Google Patents

Abstract

A second demodulator (107) that sequentially selects a plurality of physical channels and acquires digital information from the received signal of the broadcast wave transmitted on the selected physical channel, analyzes the acquired digital information, and broadcasts. A broadcast station database generator (108) that extracts broadcast signal information including information that identifies a station and generates a broadcast station database using the extracted broadcast signal information, and is generated when a channel scan request is input. It is provided with a broadcasting station list generation unit (109) that generates a broadcasting station list by referring to a broadcasting station database.

Description

The present invention relates to a technique for generating information indicating a receivable broadcasting station.

A digital broadcast receiver that receives digital broadcasts receives and demolishes broadcast signals for each physical channel at the position where it exists, confirms the presence or absence of broadcast signals, and identifies the broadcasting station. There is a function called channel scan that acquires broadcast signal information including. Here, the physical channel is assigned a specific number corresponding to a specific frequency range defined by each digital broadcasting standard.
The broadcast signal information indicating the receivable broadcast signal obtained as a result of the channel scan is usually written and stored in the non-volatile memory in the broadcast receiver. When the user gives a channel selection instruction by operation input using a remote controller or the like, the broadcast receiver performs tuning or other channel selection processing based on the stored broadcast signal information.
If it is necessary to execute a channel scan, if the broadcast signal information is not saved in the broadcast receiver, such as at the time of initial setting immediately after purchase, or if the broadcast receiver moves or the surrounding environment changes, the broadcast can be received. The waves may have changed. In particular, the latter situation occurs in mobile broadcast receivers used as mobile devices or in-vehicle devices.

Conventionally, in a mobile broadcast receiver, a channel scan is executed in response to a user's operation input, and broadcast signal information of a broadcast wave determined to be receivable by the channel scan is created, for example, as a broadcast station list. Was there.
However, the above-mentioned conventional broadcasting station list generation method has a problem that it is necessary to perform a channel scan in a place where the reception state of the broadcasting wave is good. In addition, the conventional method for generating a list of broadcasting stations has a problem that it takes time to scan all broadcast waves.
While performing a channel scan, the broadcast receiver used to search for each physical channel cannot be used to watch the program. Therefore, it is desirable that the time required for the channel scan is short.

As a technique for solving the above-mentioned problems, for example, in Patent Document 1, the first demographic unit selects a channel for program viewing, and the second demographic unit sequentially selects a physical channel and receives the channel scan. A broadcast receiver that detects a possible physical channel, generates a receivable physical channel, and broadcast service information regarding the broadcast content of the physical channel, and displays it as a broadcast station list is disclosed.

Japanese Unexamined Patent Publication No. 2011-61753

However, in the broadcast receiver described in Patent Document 1 described above, since the second demodulation unit periodically updates the broadcasting station list in parallel with the channel selection for program viewing by the first demodulation unit, The effect of reducing the time required for channel scanning or the time required for creating a list of broadcasting stations is limited. For example, if the broadcast receiver is located in a tunnel, underground parking lot, or other location where broadcast waves cannot be temporarily received, and the second demodulator cannot detect a receivable physical channel, the broadcast station list. Has been deleted and the list of broadcasting stations cannot be presented. In addition, after the broadcast receiver moves from a point where the broadcast wave cannot be temporarily received to a point where the broadcast wave can be received, the receivable physical channel is again selected by the channel scan of the second demodulation unit. It takes time to detect.

The present invention has been made to solve the above problems, shortening the time required from the request for executing the channel scan to generating the broadcasting station list, and displaying the broadcasting station list quickly. The purpose is to control the operation.

The broadcast receiver according to the present invention has a demodulator that sequentially selects a plurality of physical channels and acquires digital information from a received signal of a broadcast wave transmitted on the selected physical channel, and a digital information acquired by the demodulator. Is analyzed, broadcast signal information including information that identifies the broadcast station is extracted, and the broadcast station database generator that generates the broadcast station database using the extracted broadcast signal information, and when a channel scan request is input, broadcast. It includes a broadcasting station list generation unit that generates a broadcasting station list by referring to the broadcasting station database generated by the station database generation unit.

According to the present invention, the time required from the request for executing the channel scan to the generation of the broadcasting station list can be shortened, and the broadcasting station list can be displayed quickly.

It is a block diagram which shows the structure of the broadcast receiver which concerns on Embodiment 1. FIG. 2A and 2B are diagrams showing a hardware configuration example of the broadcast receiver. It is a flowchart which shows the operation of the channel selection process of the broadcast receiver of the invention which concerns on Embodiment 1. FIG. It is a flowchart which shows the back search processing of the broadcast receiver of the invention which concerns on Embodiment 1. FIG. It is a flowchart which shows the operation of the broadcasting station database generation processing of the broadcasting receiver of the invention which concerns on Embodiment 1. FIG. It is a figure which shows an example of the broadcasting station database generated by the broadcasting station database generation part of the broadcasting receiver which concerns on Embodiment 1. FIG. It is a flowchart which shows the broadcasting station list generation processing of the broadcasting receiver of the invention which concerns on Embodiment 1. FIG. It is a figure which shows an example of the broadcasting station list generated by the broadcasting station list generation part of the broadcasting receiver which concerns on Embodiment 1. FIG. It is a block diagram which shows the structure of the broadcast receiver which concerns on Embodiment 2. FIG. It is a flowchart which shows the operation of the broadcasting station database generation processing of the broadcasting receiver which concerns on Embodiment 2. FIG. It is a flowchart which shows the operation of the update processing of the broadcasting station list by the broadcasting station list generation unit of the broadcasting receiver which concerns on Embodiment 2. FIG. It is a figure which shows an example of the broadcasting station list updated by the broadcasting station list generation part of the broadcasting receiver which concerns on Embodiment 2. FIG. It is a flowchart which shows the operation of the broadcasting station database generation processing of the broadcasting receiver which concerns on Embodiment 3. FIG. It is a flowchart which shows the operation of the update processing of the broadcasting station list by the broadcasting station list generation unit of the broadcasting receiver which concerns on Embodiment 3. FIG. It is a figure which shows an example of the broadcasting station list updated by the broadcasting station list generation part of the broadcasting receiver which concerns on Embodiment 3. FIG. It is a flowchart which shows the operation of the broadcasting station database generation processing of the broadcasting receiver which concerns on Embodiment 4. FIG. It is a flowchart which shows the operation of the update processing of the broadcasting station list by the broadcasting station list generation unit of the broadcasting receiver which concerns on Embodiment 4. FIG. It is a block diagram which shows the structure of the broadcast receiver which concerns on Embodiment 5. It is a flowchart which shows the operation of the update processing of the broadcasting station list by the broadcasting station list generation unit of the broadcasting receiver which concerns on Embodiment 5.

Hereinafter, in order to explain the present invention in more detail, a mode for carrying out the present invention will be described with reference to the accompanying drawings.
Embodiment 1.
FIG. 1 is a block diagram showing a configuration of a broadcast receiver 1 according to the first embodiment.
The broadcast receiver 1 includes an operation reception unit 101, a channel selection control unit 102, a first demodulation unit 103, a data separation unit 104, a timer control unit 105, a scan control unit 106, and a second demodulation unit (demodulation unit) 107. It includes a broadcasting station database generation unit 108, a broadcasting station list generation unit 109, an audio decoding unit 110, a video decoding unit 111, a display control unit 112, and a storage unit 113.

Further, the broadcast receiver 1 is connected to an input device 2, a first antenna 3, a second antenna 4, an audio output device 5, and a video output device 6. The input device 2 is composed of, for example, an operation button, a touch panel, or a remote controller, and receives a user's operation input. The input device 2 receives, for example, an operation input of a user's broadcasting station selection instruction and a broadcasting station list generation instruction, and outputs the received channel selection instruction and generation instruction to the broadcast receiver 1. The first antenna 3 receives the broadcast wave of the selected broadcasting station. The second antenna 4 receives the broadcast wave of the selected frequency. The audio output device 5 is composed of, for example, a speaker, and outputs audio based on the decoded audio signal. The video output device 6 is composed of, for example, a display, and outputs video based on the decoded video signal.

Next, the details of the broadcast receiver 1 will be described.
The operation receiving unit 101 receives a user operation via the input device 2. The operation reception unit 101 outputs the received operation signal of the user operation to the channel selection control unit 102 or the broadcasting station list generation unit 109. The channel selection control unit 102 analyzes the operation signal input from the operation reception unit 101 and selects a broadcasting station. The channel selection control unit 102 outputs a control signal instructing the channel selection of the broadcasting station to the first demodulation unit 103. The first demodulation unit 103 selects a broadcasting station corresponding to the control signal input from the channel selection control unit 102. The first antenna 3 receives the broadcast wave of the broadcasting station selected by the first demodulation unit 103. The first demodulation unit 103 converts the received signal received by the first antenna 3 into digital information. The first demodulation unit 103 outputs the digital information of the converted received signal to the data separation unit 104.

The data separation unit 104 separates the digital information input from the first demodulation unit 103 into video data, audio data, and additional information. The data separation unit 104 outputs audio data to the audio decoding unit 110 and outputs video data to the video decoding unit 111. Further, the data separation unit 104 extracts information satisfying preset conditions from the separated additional information and stores it in the storage unit 113.

The timer control unit 105 includes a periodic timer for generating a broadcasting station list by back search, and controls on / off of the periodic timer. Here, the back search is a process of receiving a broadcast wave by using the second antenna 4 and the second demodulation unit 107. When the broadcast receiver 1 is activated, the timer control unit 105 turns on the periodic timer and starts counting. Further, the timer control unit 105 instructs the scan control unit 106 to start the back search when the count time of the periodic timer expires. The scan control unit 106 sets the frequency to be selected when the start instruction of the back search process is input from the timer control unit 105. The scan control unit 106 specifies a frequency to be selected to the second demodulation unit 107, and outputs a control signal so as to sequentially select each physical channel within the broadcasting range.

The second demodulation unit 107 selects a frequency corresponding to the control signal input from the scan control unit 106. The second antenna 4 receives a broadcast wave having a frequency selected by the second demodulation unit 107. The second demodulation unit 107 converts the received signal of the broadcast wave received by the second antenna 4 into digital information. The second demodulation unit 107 outputs the digital information of the converted received signal to the broadcasting station database generation unit 108. The broadcasting station database generation unit 108 analyzes the input digital information and extracts broadcasting signal information including information for identifying the broadcasting station. The broadcasting station database generation unit 108 generates a broadcasting station database using the extracted broadcast signal information, and stores the generated broadcasting station database in the storage unit 113. The broadcasting station list generation unit 109 analyzes the operation signal input from the operation reception unit 101, and when a channel scan request is input, refers to the broadcasting station database stored in the storage unit 113 to display the broadcasting station list. Generate. The broadcasting station list generation unit 109 outputs the generated broadcasting station list to the display control unit 112.

The voice decoding unit 110 decodes the voice data input from the data separation unit 104 and outputs the voice data to the voice output device 5. The video decoding unit 111 decodes the video data input from the data separation unit 104 and outputs the video data to the video output device 6. The display control unit 112 outputs control information to the video output device 6 so as to display the broadcast station list input from the broadcast station list generation unit 109. The storage unit 113 is a storage area for storing the broadcasting station database generated by the broadcasting station database generation unit 108.

Next, a hardware configuration example of the broadcast receiver 1 will be described.
2A and 2B are diagrams showing a hardware configuration example of the broadcast receiver 1.
Operation reception unit 101, channel selection control unit 102, first demodulation unit 103, data separation unit 104, timer control unit 105, scan control unit 106, second demodulation unit 107, broadcasting station database generation unit in the broadcast receiver 1. Each function of 108, the broadcasting station list generation unit 109, the audio decoding unit 110, the video decoding unit 111, and the display control unit 112 is realized by the processing circuit. That is, the broadcast receiver 1 includes a processing circuit for realizing each of the above functions. The processing circuit may be a processing circuit 100a which is dedicated hardware as shown in FIG. 2A, or may be a processor 100b which executes a program stored in the memory 100c as shown in FIG. 2B. Good.

As shown in FIG. 2A, an operation reception unit 101, a channel selection control unit 102, a first demodulation unit 103, a data separation unit 104, a timer control unit 105, a scan control unit 106, a second demodulation unit 107, and a broadcasting station database. When the generation unit 108, the broadcasting station list generation unit 109, the audio decoding unit 110, the video decoding unit 111, and the display control unit 112 are dedicated hardware, the processing circuit 100a may be, for example, a single circuit, a composite circuit, or a program. A processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-programmable Gate Array), or a combination thereof is applicable. Operation reception unit 101, channel selection control unit 102, first demodulation unit 103, data separation unit 104, timer control unit 105, scan control unit 106, second demodulation unit 107, broadcasting station database generation unit 108, broadcasting station list The functions of the generation unit 109, the audio decoding unit 110, the video decoding unit 111, and the display control unit 112 may be realized by a processing circuit, or the functions of each part may be collectively realized by one processing circuit. ..

As shown in FIG. 2B, the operation reception unit 101, the channel selection control unit 102, the first demodulation unit 103, the data separation unit 104, the timer control unit 105, the scan control unit 106, the second demodulation unit 107, and the broadcasting station database. When the generation unit 108, the broadcasting station list generation unit 109, the audio decoding unit 110, the video decoding unit 111, and the display control unit 112 are the processor 100b, the functions of each unit are realized by software, firmware, or a combination of software and firmware. Will be done. The software or firmware is described as a program and stored in the memory 100c. The processor 100b reads and executes the program stored in the memory 100c, so that the operation reception unit 101, the channel selection control unit 102, the first demodulation unit 103, the data separation unit 104, the timer control unit 105, and the scan control unit The functions of 106, the second demodulation unit 107, the broadcasting station database generation unit 108, the broadcasting station list generation unit 109, the audio decoding unit 110, the video decoding unit 111, and the display control unit 112 are realized. That is, the operation reception unit 101, the channel selection control unit 102, the first demodulation unit 103, the data separation unit 104, the timer control unit 105, the scan control unit 106, the second demodulation unit 107, the broadcasting station database generation unit 108, and broadcasting. When the station list generation unit 109, the audio decoding unit 110, the video decoding unit 111, and the display control unit 112 are executed by the processor 100b, each step shown in FIGS. 3-5 and 7 described later is eventually executed. A memory 100c for storing a program to be used is provided. Further, these programs include an operation reception unit 101, a channel selection control unit 102, a first demodulation unit 103, a data separation unit 104, a timer control unit 105, a scan control unit 106, a second demodulation unit 107, and a broadcasting station database. It can be said that the computer is made to execute the procedure or method of the generation unit 108, the broadcasting station list generation unit 109, the audio decoding unit 110, the video decoding unit 111, and the display control unit 112.

Here, the processor 100b is, for example, a CPU (Central Processing Unit), a processing device, an arithmetic unit, a processor, a microprocessor, a microcomputer, a DSP (Digital Signal Processor), or the like.
The memory 100c may be, for example, a non-volatile or volatile semiconductor memory such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable ROM), and EPROM (Electrically EPROM). However, it may be a magnetic disk such as a hard disk or a flexible disk, or an optical disk such as a mini disk, a CD (Compact Disc), or a DVD (Digital Versatile Disc).

The operation reception unit 101, the channel selection control unit 102, the first demodulation unit 103, the data separation unit 104, the timer control unit 105, the scan control unit 106, the second demodulation unit 107, the broadcasting station database generation unit 108, and broadcasting. Some of the functions of the station list generation unit 109, the audio decoding unit 110, the video decoding unit 111, and the display control unit 112 may be realized by dedicated hardware, and some may be realized by software or firmware. .. As described above, the processing circuit in the broadcast receiver 1 can realize each of the above-mentioned functions by hardware, software, firmware, or a combination thereof.

Next, the operation of the broadcast receiver 1 will be described with reference to FIGS. 3 to 8. The operation of the broadcast receiver 1 will be described separately for channel selection processing, back search processing, broadcasting station database generation processing, and broadcasting station list generation processing.
First, the operation of the channel selection process of the broadcast receiver 1 will be described with reference to FIG.
FIG. 3 is a flowchart showing the operation of the channel selection process of the broadcast receiver 1 according to the first embodiment.
The operation reception unit 101 receives a user operation for selecting a broadcasting station via the input device 2 (step ST1). The operation reception unit 101 outputs the operation signal of the user operation received in step ST1 to the channel selection control unit 102.

The channel selection control unit 102 outputs a control signal instructing the channel selection of the broadcasting station indicated by the operation signal input from the operation reception unit 101 to the first demodulation unit 103 (step ST2). The first demodulation unit 103 selects a broadcasting station corresponding to the control signal output in step ST2 (step ST3). The first demodulation unit 103 acquires the reception signal of the broadcast wave of the broadcasting station selected in step ST3 received by the first antenna 3 (step ST4). The first demodulation unit 103 converts the received signal acquired in step ST4 into digital information (step ST5). The first demodulation unit 103 outputs the converted digital information to the data separation unit 104.

The data separation unit 104 separates the digital information input from the first demodulation unit 103 into audio data, video data, and additional information (step ST6). The data separation unit 104 outputs the audio data separated in step ST5 to the audio decoding unit 110, and outputs the video data to the video decoding unit 111 (step ST7). Further, the data separation unit 104 extracts the necessary information set in advance from the additional information separated in step ST5, and stores the extracted data in the storage unit 113 (step ST8).

The voice decoding unit 110 decodes the voice data input from the data separation unit 104 and outputs the voice data to the voice output device 5 (step ST9). The video decoding unit 111 decodes the video data input from the data separation unit 104, outputs the video data to the video output device 6 (step ST10), and ends the process.

Next, the operation of the back search process of the broadcast receiver 1 according to the first embodiment will be described with reference to FIG.
FIG. 4 is a flowchart showing a back search process of the broadcast receiver 1 according to the first embodiment.
Hereinafter, it is assumed that the periodic timer included in the timer control unit 105 is in the ON state. The periodic timer is turned on, for example, when the broadcast receiver 1 is activated, or when the scan control unit 106 finishes selecting all frequencies within the broadcast range.

The timer control unit 105 refers to the count of the periodic timer and determines whether or not the count time has expired (step ST21). If the count time has not expired (step ST21; NO), the flowchart repeats the determination process of step ST21. On the other hand, when the count time has expired (step ST21; YES), the timer control unit 105 turns off the periodic timer and instructs the scan control unit 106 to start the back search (step ST22). The scan control unit 106 sets the frequency to be selected based on the back search start instruction input from the timer control unit 105 (step ST23). The scan control unit 106 controls the second demodulation unit 107 so as to sequentially select the frequencies set in step ST23 (step ST24).

When the received signal of the broadcast wave received by the second antenna 4 is input (step ST25), the second demodulation unit 107 converts the input received signal into digital information (step ST26). The second demodulation unit 107 outputs the digital information converted in step ST26 to the broadcasting station database generation unit 108. The broadcasting station database generation unit 108 analyzes the input digital information and generates a broadcasting station database (step ST27). The details of the broadcasting station database generation process will be described later. The broadcasting station database generation unit 108 stores the generated broadcasting station database in the storage unit 113 (step ST28).

The scan control unit 106 determines whether or not all frequencies within the broadcast range have been selected (step ST29). If all frequencies have not been selected (step ST29; NO), the process returns to step ST23. On the other hand, when all frequencies are selected (step ST29; YES), the scan control unit 106 instructs the timer control unit 105 to start the timer (step ST30). After that, the flowchart proceeds to the process of step ST21.
By the above-described processing, periodic back search processing is performed, and a broadcasting station database that can be received by the broadcasting receiver 1 can be generated.

Next, the process of generating the broadcasting station database shown in step ST27 of the flowchart of FIG. 4 described above will be described with reference to the flowchart of FIG.
FIG. 5 is a flowchart showing the operation of the broadcasting station database generation processing of the broadcasting receiver 1 according to the first embodiment.
The broadcasting station database generation unit 108 acquires the broadcasting station database stored in the storage unit 113 (step ST41). The broadcasting station database generation unit 108 determines whether or not a broadcast wave having a frequency indicated in the digital information input from the second demodulation unit 107 can be received (step ST42). When the broadcast wave can be received (step ST42; YES), the broadcast station database generation unit 108 determines whether or not the broadcast station of the receivable broadcast wave is recorded in the broadcast station database acquired in step ST41. (Step ST43). When recorded in the broadcasting station database (step ST43; YES), the broadcasting station database generation unit 108 sets the life count of the broadcasting station to the initial value (step ST44).

Here, the life count is a counter value for determining whether or not the broadcasting station can receive the signal. The broadcasting station database generation unit 108 sets an initial value (for example, 180 (3 minutes)) when the reception of the broadcasting station is detected, and when the reception failure of the broadcasting station is detected, the counter value is periodically set. Start subtraction (eg, subtraction every second). The broadcasting station database generation unit 108 refers to the life count counter, and determines that the corresponding broadcasting station can receive the data during the period when the counter is not "0". Further, the broadcasting station database generation unit 108 refers to the life count counter, and when the counter is periodically subtracted to "0", the corresponding broadcasting station has a preset period (the above-mentioned initial value). (For example, 180)), it is determined that reception is not possible. This makes it possible to distinguish between a temporarily unreceivable state of the broadcast receiver due to, for example, passing through a tunnel of a vehicle, and a unreceivable state due to the broadcast receiver completely moving out of the reception area due to the movement of the vehicle.

On the other hand, when it is not recorded in the broadcasting station database (step ST43; NO), the broadcasting station database generation unit 108 adds the newly detected broadcasting station to the broadcasting station database and sets the life count of the broadcasting station to the initial value. (Step ST45). When the process of step ST44 or step ST45 is completed, the flowchart proceeds to the process of step ST28 of the flowchart of FIG.

If the broadcast wave is not receivable (step ST42; NO), the broadcast station database generation unit 108 determines whether or not the broadcast station corresponding to the frequency of the broadcast wave is recorded in the broadcast station database acquired in step ST41. Is determined (step ST46). If it is not recorded in the broadcasting station database (step ST46; NO), the flowchart proceeds to the process of step ST28 of the flowchart of FIG.

On the other hand, when it is recorded in the broadcasting station database (step ST46; YES), the broadcasting station database generation unit 108 starts subtracting the life count of the broadcasting station (step ST47). The broadcasting station database generation unit 108 refers to the counter value of the life count and determines whether or not the counter value is “0” (step ST48). If the counter value is not "0" (step ST48; NO), the flowchart proceeds to the process of step ST28 of the flowchart of FIG. On the other hand, when the counter value is "0" (step ST48; YES), the broadcasting station database generation unit 108 deletes the broadcasting station from the broadcasting station database (step ST49). After that, the flowchart proceeds to the process of step ST28 of the flowchart of FIG.
By processing the flowchart of FIG. 4 described above, a broadcasting station database that can be received by the broadcasting receiver 1 can be created.

FIG. 6 is a diagram showing an example of a broadcasting station database generated by the broadcasting station database generation unit 108 of the broadcasting receiver 1 according to the first embodiment.
The broadcasting station database is list information that stores information indicating a broadcasting station detected by the back search process shown in the flowcharts of FIGS. 4 and 5 described above. The list information of the broadcasting station database is composed of number 201, channel information 202, broadcasting station name 203, life count counter value 204, broadcasting station list display threshold 205, and broadcasting station list display presence / absence 206. The channel information 202 and the broadcasting station name 203 are information transmitted from each broadcasting station. The broadcasting station database shown in FIG. 6 is an example, and the information constituting the database can be added and deleted as appropriate.

The life count counter value 204 starts subtraction when the broadcasting station database generation unit 108 detects that the broadcasting station cannot be received, and decreases periodically. The display threshold value 205 of the broadcasting station list is a value for determining whether or not to display each broadcasting station in the broadcasting station list. Broadcasting stations whose life count counter value 204 is less than the display threshold value 205 of the broadcasting station list are excluded from the display target in the broadcasting station list.

Next, the operation of the broadcasting station list generation processing of the broadcasting receiver 1 according to the first embodiment will be described with reference to FIG. 7.
FIG. 7 is a flowchart showing a broadcasting station list generation process of the broadcasting receiver 1 according to the first embodiment.
The operation reception unit 101 receives a user operation (channel scan request) instructing the start of the channel scan via the input device 2 (step ST51). The operation reception unit 101 outputs the operation signal of the user operation received in step ST51 to the broadcasting station list generation unit 109.

The broadcasting station list generation unit 109 acquires the current broadcasting station database from the storage unit 113 in response to the operation signal input from the operation reception unit 101 (step ST52). The broadcasting station list generation unit 109 generates a broadcasting station list to be presented to the user based on the broadcasting station database acquired in step ST52 (step ST53). The broadcasting station list generation unit 109 outputs the generated broadcasting station list to the display control unit 112 (step ST54), and ends the process.

By processing the flowchart of FIG. 7 described above, when a user operation instructing the start of channel scanning is received, a receivable broadcast generated in advance by back search is performed without actually executing the channel scanning operation. A broadcasting station list is generated from the station database and presented to the user.

FIG. 8 is a diagram showing an example of a broadcasting station list generated by the broadcasting station list generation unit 109 of the broadcasting receiver 1 according to the first embodiment.
The broadcasting station list is list information of broadcasting stations presented to the user, which is generated by the broadcasting station list generation process shown in the flowchart of FIG. 7 described above.
The broadcasting station list 600 is composed of channel information 601 and broadcasting station name 602. The channel information 601 and the broadcasting station name 602 are information acquired from the list information of the broadcasting station database. The list of broadcasting stations shown in FIG. 8 is an example, and the information constituting the list can be added and deleted as appropriate.

As described above, in the first embodiment, the second demodulator 107 for sequentially selecting a plurality of physical channels and acquiring digital information from the received signal of the broadcast wave transmitted on the selected physical channels, A broadcast station database generation unit 108 that analyzes the acquired digital information, extracts broadcast signal information including information that identifies the broadcast station, and generates a broadcast station database using the extracted broadcast signal information, and a channel scan request. When input, it is configured to include a broadcasting station list generation unit 109 that generates a broadcasting station list by referring to the generated broadcasting station database.

As a result, when a channel scan request is input, a broadcasting station list can be generated from the broadcasting station database generated in advance by the back search without executing the channel scanning operation. As a result, it is possible to shorten the time from the input of the channel scan request to the generation of the broadcasting station list, and it is possible to control the display of the broadcasting station list quickly. It is possible to present the user with a list of stations that can be received at the current position of the broadcast receiver.

Embodiment 2.
In the second embodiment, when the information of the broadcasting station is deleted in the generation process of the broadcasting station database, the user can recognize the deletion of the information of the broadcasting station.
FIG. 9 is a block diagram showing the configuration of the broadcast receiver 1a according to the second embodiment.
The broadcast receiver 1a of the second embodiment replaces the broadcast station database generation unit 108 and the broadcast station list generation unit 109 of the broadcast receiver 1 shown in the first embodiment with the broadcast station database generation unit 108a and the broadcast station list. A generation unit 109a is provided and configured. In the following, the same or corresponding parts as the components of the broadcast receiver 1 according to the first embodiment are designated by the same reference numerals as those used in the first embodiment, and the description thereof will be omitted or simplified. ..

In addition to the processing shown in the first embodiment, the broadcasting station database generation unit 108a notifies the broadcasting station list generation unit 109a of the information of the deleted broadcasting station when the broadcasting station is deleted from the broadcasting station database. When the broadcasting station list generation unit 109a receives the notification of the deleted broadcasting station information, the broadcasting station list is updated in order to notify the user of the deletion of the broadcasting station. The broadcasting station list generation unit 109a outputs the updated broadcasting station list to the display control unit 112.

Since the hardware configuration example of the broadcast receiver 1a of the second embodiment is the same as that of the first embodiment, the description thereof will be omitted.

Next, the operation of the broadcast receiver 1a according to the second embodiment will be described.
FIG. 10 is a flowchart showing the operation of the broadcasting station database generation processing of the broadcasting receiver 1a according to the second embodiment.
In FIG. 10, the same steps as the flowchart of the first embodiment shown in FIG. 5 are designated by the same reference numerals, and the description thereof will be omitted.
When the broadcasting station database generation unit 108a determines that the counter value is "0" by referring to the counter value of the life count (step ST48; YES), the broadcasting station database generation unit 108a deletes the corresponding broadcasting station from the broadcasting station database (step ST49). ). The broadcasting station database generation unit 108a notifies the broadcasting station list generation unit 109a of the information of the broadcasting station deleted in step ST49 (step ST61). After that, the flowchart proceeds to the process of step ST28 of the flowchart of FIG.

FIG. 11 is a flowchart showing the operation of the broadcast station list update process by the broadcast station list generation unit 109a of the broadcast receiver 1a according to the second embodiment.
The broadcasting station list generation unit 109a receives the information of the deleted broadcasting station notified from the broadcasting station database generation unit 108a (step ST71). The broadcasting station list generation unit 109a determines whether or not the deleted broadcasting station information exists in the broadcasting station list currently displayed on the video output device 6 (step ST72). If the deleted broadcasting station information does not exist in the broadcasting station list (step ST72; NO), the process ends. On the other hand, when the deleted broadcasting station information exists in the broadcasting station list (step ST72; YES), the broadcasting station list generation unit 109a updates the broadcasting station list (step ST73). The broadcasting station list generation unit 109a outputs the updated broadcasting station list to the display control unit 112 (step ST74), and ends the process.

FIG. 12 is a diagram showing an example of a broadcasting station list updated by the broadcasting station list generation unit 109a of the broadcasting receiver 1a according to the second embodiment.
The broadcasting station list 600 is composed of channel information 601 and broadcasting station name 602. Further, the broadcasting station list 600 includes an icon display 603 indicating that the broadcasting station cannot be received and a grayout display 604 indicating that the broadcasting station cannot be received. The icon display 603 is displayed after the broadcasting station name 602 of the broadcasting station that cannot be received. The grayout display 604 displays the channel information 601 and the broadcasting station name 602 in gray color, for example, as shown in FIG. The icon display 603 and the grayout display 604 shown in FIG. 12 are examples, and can be appropriately changed as long as the display allows the user to recognize that the information of the broadcasting station has been deleted.
By updating the broadcasting station list generation unit 109a to perform the icon display 603 and the grayout display 604, the user can easily recognize the broadcasting station that can no longer be received.

As described above, in the second embodiment, the broadcasting station database generation unit 108a analyzes the digital information, and there is a broadcasting station that cannot be received for a preset period, and the broadcasting station is stored in the broadcasting station database. If it is recorded, the broadcasting station is deleted from the broadcasting station database, the deletion of the broadcasting station is notified to the broadcasting station list generation unit 109a, and the broadcasting station list generation unit 109a is preset based on the notification. It is configured to perform display control indicating that reception is not possible in the broadcasting station list of broadcasting stations that cannot be received during the period.

As a result, the user can determine that the corresponding broadcasting station cannot receive the signal. As a result, it is possible to prompt the user to input an operation instructing the start of the channel scan. Further, even when the frequency of the broadcasting station is changed, it is possible to prompt the user to input an operation instructing the start of channel scanning of the broadcasting receiver.

Embodiment 3.
In the third embodiment, when the information of the broadcasting station is added in the generation process of the broadcasting station database, the user can recognize the addition of the information of the broadcasting station.
Since the configuration of the broadcast receiver 1a according to the third embodiment is the same as the configuration of the broadcast receiver 1a according to the second embodiment, the description of the block diagram is omitted. Further, in the following, the same or corresponding parts as the components of the broadcast receiver 1a according to the second embodiment are designated by the same reference numerals as those used in the second embodiment, and the description thereof will be omitted or simplified. ..

In addition to the processing shown in the first embodiment, the broadcasting station database generation unit 108a notifies the broadcasting station list generation unit 109a of the information of the added broadcasting station when the broadcasting station is added to the broadcasting station database.
When the broadcasting station list generation unit 109a receives the notification of the information of the added broadcasting station, the broadcasting station list is updated in order to notify the user of the addition of the broadcasting station. The broadcasting station list generation unit 109a outputs the updated broadcasting station list to the display control unit 112.

Since the hardware configuration example of the broadcast receiver 1a of the third embodiment is the same as that of the first embodiment, the description thereof will be omitted.

Next, the operation of the broadcast receiver 1a according to the third embodiment will be described.
FIG. 13 is a flowchart showing the operation of the broadcasting station database generation processing of the broadcasting receiver 1a according to the third embodiment.
In FIG. 13, the same steps as those in the flowchart of the first embodiment shown in FIG. 5 are designated by the same reference numerals, and the description thereof will be omitted.
When the broadcasting station database generation unit 108a is added to the broadcasting station database as a newly detected broadcasting station in step ST45, the information of the added broadcasting station is notified to the broadcasting station list generation unit 109a (step ST62). After that, the flowchart proceeds to the process of step ST28 of the flowchart of FIG.

FIG. 14 is a flowchart showing the operation of the broadcast station list update process by the broadcast station list generation unit 109a of the broadcast receiver 1a according to the third embodiment.
The broadcasting station list generation unit 109a receives the information of the added broadcasting station notified from the broadcasting station database generation unit 108a (step ST81). The broadcasting station list generation unit 109a updates the broadcasting station list by adding the broadcasting station information (step ST82). The broadcasting station list generation unit 109a outputs the updated broadcasting station list to the display control unit 112 (step ST83), and ends the process.

FIG. 15 is a diagram showing an example of a broadcasting station list updated by the broadcasting station list generation unit 109a of the broadcasting receiver 1a according to the third embodiment.
The broadcasting station list 600 is composed of channel information 601 and broadcasting station name 602. Further, the broadcasting station list 600 includes an icon display 611 indicating that information on broadcasting stations can be added and displayed. The icon display 611 displays a number indicating the number of additional broadcasting stations that can be additionally displayed, as shown in FIG. 15, for example. The icon display 611 shown in FIG. 15 is an example, and can be appropriately changed as long as the display allows the user to recognize that the information of the broadcasting station has been added.
By updating the broadcasting station list generation unit 109a by adding the icon display 611 and displaying it, the user can easily recognize that there is a broadcasting station that can be received.
In the above, the case where only the icon display 611 is performed is shown. The broadcast station that has become receivable is actually added to the broadcast station list when the user inputs an operation instructing the start of the channel scan and the broadcast station list is updated.

As described above, in the third embodiment, the broadcasting station database generation unit 108a analyzes digital information, a newly detected broadcasting station exists, and the broadcasting station is not recorded in the broadcasting station database. In the case, the broadcasting station is added to the broadcasting station database, the addition of the broadcasting station is notified to the broadcasting station list generation unit 109a, and the broadcasting station list generation unit 109a newly detects the addition in the broadcasting station list based on the notification. It is configured to perform display control indicating that the added broadcasting station can be added.

This makes it possible for the user to determine that the new broadcasting station is receivable, thereby prompting the user to input an operation instructing the start of channel scanning of the broadcasting receiver.

In addition, the above-described third embodiment shows a case where the broadcast receiver 1 according to the first embodiment is added with a configuration for controlling the addition of information of the broadcasting station so as to be recognizable by the user. However, the present invention is not limited to this configuration, and a configuration may be added to the broadcast receiver 1a according to the second embodiment to control the addition of broadcasting station information so that the user can recognize it.

Embodiment 4.
In the second embodiment described above, a configuration is shown in which the user can recognize that the broadcasting station in the broadcasting station list cannot be received. Further, in the third embodiment described above, a configuration is shown in which the user can recognize that a newly detected broadcasting station can be added to the broadcasting station list.
In the fourth embodiment, a configuration in which a broadcasting station that cannot be received is automatically deleted from the broadcasting station list and a configuration in which a new broadcasting station that can be newly received is automatically added to the broadcasting station list are configured. Shown.
Since the configuration of the broadcast receiver 1a according to the fourth embodiment is the same as the configuration of the broadcast receiver 1a according to the second embodiment and the third embodiment, the description of the block diagram is omitted. Further, in the following, the same or corresponding parts as the components of the broadcast receiver 1a according to the second and third embodiments are designated by the same reference numerals as those used in the second and third embodiments. The explanation is omitted or simplified by adding.

In addition to the processing shown in the first embodiment, the broadcasting station database generation unit 108a notifies the broadcasting station list generation unit 109a of the information of the deleted broadcasting station when the broadcasting station is deleted from the broadcasting station database. Further, when a broadcasting station is added to the broadcasting station database, the broadcasting station database generation unit 108a notifies the broadcasting station list generation unit 109a of the information of the added broadcasting station. When the broadcasting station list generation unit 109a receives the notification of the information of the deleted broadcasting station, the broadcasting station list generation unit 109a updates to delete the corresponding broadcasting station from the broadcasting station list. Further, when the broadcasting station list generation unit 109a receives the notification of the information of the added broadcasting station, the broadcasting station list generation unit 109a updates to add the corresponding broadcasting station to the broadcasting station list. The broadcasting station list generation unit 109a outputs the updated broadcasting station list to the display control unit 112.

Since the hardware configuration example of the broadcast receiver 1a of the fourth embodiment is the same as that of the first embodiment, the description thereof will be omitted.

Next, the operation of the broadcast receiver 1a according to the fourth embodiment will be described.
FIG. 16 is a flowchart showing the operation of the broadcasting station database generation processing of the broadcasting receiver 1a according to the fourth embodiment.
In FIG. 16, the same steps as the flowcharts of the first to third embodiments shown in FIGS. 5, 10 and 13 are designated by the same reference numerals, and the description thereof will be omitted.
When the broadcasting station database generation unit 108a is added to the broadcasting station database as a newly detected broadcasting station in step ST45, the information of the added broadcasting station is notified to the broadcasting station list generation unit 109a (step ST62). After that, the flowchart proceeds to the process of step ST28 of the flowchart of FIG.

On the other hand, when the broadcasting station database generation unit 108a determines that the counter value is "0" by referring to the counter value of the life count (step ST48; YES), the broadcasting station database generation unit 108a deletes the corresponding broadcasting station from the broadcasting station database (step ST48; YES). Step ST49). The broadcasting station database generation unit 108a notifies the broadcasting station list generation unit 109a of the information of the broadcasting station deleted in step ST49 (step ST61). After that, the flowchart proceeds to the process of step ST28 of the flowchart of FIG.

FIG. 17 is a flowchart showing an operation of updating the broadcasting station list by the broadcasting station list generation unit 109a of the broadcasting receiver 1a according to the fourth embodiment.
In FIG. 17, the same steps as the flowcharts of the second and third embodiments shown in FIGS. 11 and 14 are designated by the same reference numerals, and the description thereof will be omitted.
When the broadcasting station list generation unit 109a receives the notification from the broadcasting station database generation unit 108a (step ST91), the broadcasting station list generation unit 109a determines whether or not the notification is a notification for adding information of the broadcasting station (step ST92). In the case of a notification for adding broadcasting station information (step ST92; YES), the broadcasting station list generation unit 109a adds the corresponding broadcasting station to the broadcasting station list (step ST93). The broadcasting station list generation unit 109a outputs the updated broadcasting station list to the display control unit 112 (step ST94).

On the other hand, if it is not a notification to add broadcasting station information (step ST92; NO), the broadcasting station list generation unit 109a further determines whether or not the notification is a notification to delete the broadcasting station information (step ST95). .. If it is not a notification to delete the information of the broadcasting station (step ST95; NO), the process ends. On the other hand, in the case of a notification for deleting the information of the broadcasting station (step ST95; YES), the broadcasting station list generation unit 109a displays the information of the deleted broadcasting station in the broadcasting station list currently displayed in the video output device 6. It is determined whether or not it exists in (step ST96). If the deleted broadcasting station information does not exist in the broadcasting station list (step ST96; NO), the process ends. On the other hand, when the deleted broadcasting station information exists in the broadcasting station list (step ST96; YES), the broadcasting station list generation unit 109a deletes the corresponding broadcasting station from the broadcasting station list (step ST97). After that, the flowchart proceeds to the process of step ST94.

When the update process for deleting the information of the broadcasting station is performed according to the flowchart of FIG. 17, the broadcasting station that cannot receive the information for a predetermined time immediately receives the operation input for instructing the start of the channel scan from the user. , Can be automatically removed from the list of stations.
Further, when the update process for adding the broadcasting station information is performed according to the flowchart of FIG. 17, the added broadcasting station immediately lists the broadcasting stations even if there is no operation input instructing the user to start the channel scan. Can be added automatically to.

As described above, in the fourth embodiment, the broadcasting station database generation unit 108a analyzes digital information, and there is a broadcasting station that cannot be received for a preset period, and the broadcasting station is stored in the broadcasting station database. If it is recorded, the broadcasting station is deleted from the broadcasting station database, the deletion of the broadcasting station is notified to the broadcasting station list generation unit 109a, and the broadcasting station list generation unit 109a is notified from the broadcasting station list based on the notification. , It is configured to delete a broadcasting station that cannot be received for a preset period.
As a result, a broadcasting station that cannot be received for a predetermined time can be automatically deleted from the broadcasting station list immediately even if there is no operation input from the user instructing the start of channel scanning.

Further, in the fourth embodiment, the broadcasting station database generation unit 108a analyzes digital information and broadcasts when a newly detected broadcasting station exists and the broadcasting station is not recorded in the broadcasting station database. The broadcasting station is added to the station database, the addition of the broadcasting station is notified to the broadcasting station list generation unit 109a, and the broadcasting station list generation unit 109a notifies the newly detected broadcasting to the broadcasting station list based on the notification. Configured to add stations.
As a result, the broadcast stations that have become receivable can be automatically added from the broadcast station list immediately even if there is no operation input instructing the user to start the channel scan. As a result, the broadcasting station can be selected even when the broadcasting receiver moves in the receiving area.

In the fourth embodiment described above, the broadcast receiver 1a includes both a configuration for deleting a broadcasting station that cannot be received for a preset period and a configuration for adding a newly detected broadcasting station. showed that. However, the broadcast receiver 1a may have only one of the configurations.

Embodiment 5.
In the fifth embodiment, a configuration is shown in which it is determined whether or not to automatically delete a broadcasting station from the broadcasting station list according to the current position of the broadcasting receiver.

FIG. 18 is a block diagram showing the configuration of the broadcast receiver 1b according to the fifth embodiment.
The broadcast receiver 1b of the fifth embodiment is configured by adding the position information acquisition unit 114 and the map information storage unit 115 to the broadcast receiver 1a shown in the fourth embodiment. Further, the broadcast receiver 1b of the fifth embodiment is configured by providing a broadcast station list generation unit 109b in place of the broadcast station list generation unit 109a of the broadcast receiver 1a shown in the fourth embodiment. In the following, the same or corresponding parts as the components of the broadcast receiver 1 according to the fourth embodiment are designated by the same reference numerals as those used in the fourth embodiment, and the description thereof will be omitted or simplified. ..

The position information acquisition unit 114 acquires position information indicating the current position of the broadcast receiver 1b based on, for example, a GPS signal received from a GPS receiver (not shown). The position information acquisition unit 114 outputs the acquired position information to the broadcasting station list generation unit 109b. The position information acquisition unit 114 may periodically acquire the position information at preset intervals, or may acquire the position information in response to an acquisition request input from the broadcasting station list generation unit 109b.
The map information storage unit 115 is a storage area for storing map information. The map information storage unit 115 may be configured as a storage area outside the broadcast receiver 1a.

In the broadcasting station list generation unit 109b, the broadcast receiver 1b temporarily transmits a broadcast wave based on the position information of the broadcast receiver 1b acquired by the position information acquisition unit 114 and the map information stored in the map information storage unit 115. It is determined whether or not it is located at a point where it cannot be received. Here, the point where the broadcast wave cannot be temporarily received is, for example, in a tunnel or an underground parking lot.
When the broadcasting station list generation unit 109b receives the notification of the broadcasting station information deleted from the broadcasting station database generation unit 108a, the broadcasting station list generation unit 109b acquires the position information of the broadcast receiver 1b from the position information acquisition unit 114. The broadcasting station list generation unit 109b refers to the map information stored in the map information storage unit 115, and if the position information of the broadcasting receiver 1b is not a point at which the broadcasting wave cannot be temporarily received, the broadcasting station information is input. Remove from the station list. This is a process in which the broadcasting station list generation unit 109b automatically deletes the broadcasting station information from the broadcasting station list without performing the channel scan. On the other hand, when the position information of the broadcast receiver 1b is a point where the broadcast wave cannot be temporarily received, the broadcast station list generation unit 109b does not delete the broadcast station information from the broadcast station list.

Further, when the broadcasting station list generation unit 109b receives the notification of the broadcasting station information added from the broadcasting station database generation unit 108a, the broadcasting station list generation unit 109b adds the broadcasting station information to the broadcasting station list. This is a process in which the broadcasting station list generation unit 109b automatically adds the broadcasting station list without performing channel scanning.

Next, a hardware configuration example of the broadcast receiver 1b will be described. Since the diagram showing the hardware configuration example of the broadcast receiver 1b of the fifth embodiment is the same as those of FIGS. 2A and 2B shown in the first embodiment, the illustration is omitted. Further, the description of the same configuration as that of the first embodiment will be omitted.
The position information acquisition unit 114 and the broadcast station list generation unit 109b in the broadcast receiver 1b may be a processing circuit 100a which is dedicated hardware as shown in FIG. 2A, or may be stored in the memory 100c as shown in FIG. 2B. It may be a processor 100b that executes a stored program.

Further, as shown in FIG. 2B, when the position information acquisition unit 114 and the broadcasting station list generation unit 109b are processors 100b, the functions of the location information acquisition unit 114 and the broadcasting station list generation unit 109b are software, firmware, or software. It is realized by the combination of and firmware. The software or firmware is described as a program and stored in the memory 100c. The processor 100b realizes the functions of the position information acquisition unit 114 and the broadcasting station list generation unit 109b by reading and executing the program stored in the memory 100c. That is, the position information acquisition unit 114 and the broadcasting station list generation unit 109b are a memory for storing a program in which each step shown in FIG. 19 described later will be executed as a result when executed by the processor 100b. It is equipped with 100c. Further, it can be said that these programs cause the computer to execute the procedure or method of the position information acquisition unit 114 and the broadcasting station list generation unit 109b.

The functions of the position information acquisition unit 114 and the broadcasting station list generation unit 109b may be partially realized by dedicated hardware and partly realized by software or firmware. As described above, the processing circuit 100a in the broadcast receiver 1b can realize each of the above-mentioned functions by hardware, software, firmware, or a combination thereof.

Next, the processing operation of the broadcast receiver 1b will be described.
FIG. 19 is a flowchart showing an operation of updating the broadcasting station list by the broadcasting station list generation unit 109b of the broadcasting receiver 1b according to the fifth embodiment. In FIG. 19, the same steps as the flowchart of the first embodiment shown in FIG. 17 of the fourth embodiment are designated by the same reference numerals, and the description thereof will be omitted.
The process of adding a broadcasting station to the broadcasting station list by the broadcasting station list generation unit 109b is the same as that of the fourth embodiment.

On the other hand, when it is a notification to delete the information of the broadcasting station (step ST95; YES), and when the information of the deleted broadcasting station exists in the broadcasting station list (step ST96; YES), the broadcasting station list generator 109b acquires the position information of the broadcast receiver 1b from the position information acquisition unit 114 (step ST101). The broadcasting station list generation unit 109b refers to the map information stored in the map information storage unit 115, and the current position of the broadcasting receiver 1b indicated by the position information acquired in step ST101 temporarily receives the broadcasting wave. It is determined whether or not the point cannot be reached (step ST102). When the current position of the broadcast receiver 1b is a point where the broadcast wave cannot be temporarily received (step ST102; YES), the broadcast station list generation unit 109b ends the process.

On the other hand, when the current position of the broadcast receiver 1b is not a point where the broadcast wave cannot be temporarily received (step ST102; NO), the broadcast station list generation unit 109b deletes the broadcast station from the broadcast station list (step ST103). After that, the flowchart proceeds to the process of step ST94.

As described above, in the fifth embodiment, the position information acquisition unit 114 for acquiring the position information indicating the current position of the broadcast receiver 1b is provided, and the broadcasting station list generation unit 109b includes the acquired position information and the map. If it is determined based on the information that the broadcast receiver 1b is not located at a point where the broadcast wave of the broadcast station cannot be temporarily received, the broadcast station is deleted from the broadcast station list and the broadcast receiver 1b broadcasts. When it is determined that the station is located at a point where it cannot temporarily receive the broadcast wave of the station, the broadcast station is not deleted from the broadcast station list.
As a result, when the broadcast receiver 1b moves from a point where the broadcast wave of the broadcast station cannot be temporarily received to a point where the broadcast wave can be received, the broadcast station does not have to wait for the rediscovery of the broadcast station by the back search process. Can be tuned in.

In the above-described 4th and 5th embodiments, whether or not to automatically delete a broadcasting station that cannot be received for a predetermined time from the broadcasting station list in the back search process can be determined by setting a menu or the like. The configuration may be determined by the user.
Similarly, when a new broadcasting station is detected in the back search process, whether or not to automatically add the broadcasting station to the broadcasting station list may be determined by the user by menu setting or the like. Good.

Further, in the above-described first embodiment, the broadcast receivers 1, 1a, 1b are configured to include the storage unit 113, but the storage unit 113 is in a storage area outside the broadcast receivers 1, 1, 1b. It may be configured.

In addition to the above, the present invention allows any combination of embodiments, modifications of any component of each embodiment, or omission of any component in each embodiment within the scope of the invention. It is possible.

The broadcast receiver according to the present invention is a mobile receiver used as a portable device, an in-vehicle device, or the like, and the broadcast wave that can be received changes due to the movement of the receiver or a change in the surrounding environment. It is preferable to apply.

1,1a, 1b Broadcast receiver, 101 operation reception unit, 102 channel selection control unit, 103 first demodulation unit, 104 data separation unit, 105 timer control unit, 106 scan control unit, 107 second demodulation unit, 108 , 108a Broadcast station database generation unit, 109,109a, 109b Broadcast station list generation unit, 110 audio decoding unit, 111 video decoding unit, 112 display control unit, 113 storage unit, 114 position information acquisition unit, 115 map information storage unit.

The broadcast receiver according to the present invention has a demodulator that sequentially selects a plurality of physical channels and acquires digital information from a received signal of a broadcast wave transmitted on the selected physical channel, and a digital information acquired by the demodulator. Is analyzed, broadcast signal information including information that identifies the broadcast station is extracted, and the broadcast station database generator that generates the broadcast station database using the extracted broadcast signal information, and when a channel scan request is input, broadcast. The broadcasting station list generation unit includes a broadcasting station list generation unit that generates a broadcasting station list by referring to the broadcasting station database generated by the station database generation unit, and a display control unit that outputs a display of the broadcasting station list. , A broadcast receiver characterized in that the displayed list of broadcast stations includes a display indicating that the change is made in response to a change in the broadcast station database .

Claims (7)

A demodulation unit that sequentially selects a plurality of physical channels and acquires digital information from the received signal of the broadcast wave transmitted on the selected physical channel.
A broadcasting station database generation unit that analyzes digital information acquired by the demodulator, extracts broadcast signal information including information that identifies a broadcasting station, and generates a broadcasting station database using the extracted broadcasting signal information.
A broadcast receiver including a broadcasting station list generation unit that generates a broadcasting station list by referring to a broadcasting station database generated by the broadcasting station database generation unit when a channel scan request is input. The broadcasting station database generation unit analyzes the digital information acquired by the demographic unit, and when there is a broadcasting station that cannot be received for a preset period and the broadcasting station is recorded in the broadcasting station database. , Delete the broadcasting station from the broadcasting station database, notify the broadcasting station list generation unit of the deletion of the broadcasting station, and
Based on the notification from the broadcasting station database generation unit, the broadcasting station list generation unit performs display control indicating that reception is not possible on the broadcasting station list of the broadcasting station that cannot be received for the preset period. The broadcast receiver according to claim 1, wherein the broadcast receiver is to be performed. The broadcasting station database generation unit analyzes the digital information acquired by the demographic unit, and if a newly detected broadcasting station exists and the broadcasting station is not recorded in the broadcasting station database, the broadcasting station The broadcasting station is added to the database, and the addition of the broadcasting station is notified to the broadcasting station list generation unit.
The broadcasting station list generation unit is characterized in that it performs display control indicating that the newly detected broadcasting station can be added to the broadcasting station list based on the notification from the broadcasting station database generation unit. The broadcast receiver according to claim 1 or 2. The broadcasting station database generation unit analyzes the digital information acquired by the demographic unit, and when there is a broadcasting station that cannot be received for a preset period and the broadcasting station is recorded in the broadcasting station database. , The broadcasting station is deleted from the broadcasting station database, and the deletion of the broadcasting station is notified to the broadcasting station list generation unit.
The broadcasting station list generation unit deletes a broadcasting station that cannot be received for a preset period from the broadcasting station list based on a notification from the broadcasting station database generation unit. The broadcast receiver described. A position information acquisition unit for acquiring position information indicating the current position of the broadcast receiver is provided.
The broadcast station list generation unit is not located at a point where the broadcast receiver cannot temporarily receive the broadcast wave of the broadcast station based on the position information acquired by the position information acquisition unit and the map information. When it is determined that the broadcasting station is deleted from the broadcasting station list and the broadcasting receiver is located at a point where the broadcasting wave of the broadcasting station cannot be temporarily received, the broadcasting station is determined. The broadcast receiver according to claim 4, wherein the broadcast station is not deleted from the list. The broadcasting station database generation unit analyzes the digital information acquired by the demographic unit, and if a newly detected broadcasting station exists and the broadcasting station is not recorded in the broadcasting station database, the broadcasting station The broadcasting station is added to the database, and the addition of the broadcasting station is notified to the broadcasting station list generation unit.
Claims 1 and 4 are characterized in that the broadcasting station list generation unit adds the newly detected broadcasting station to the broadcasting station list based on a notification from the broadcasting station database generation unit. And the broadcast receiver according to any one of claim 5. A step in which the demodulation unit sequentially selects a plurality of physical channels and acquires digital information from the received signal of the broadcast wave transmitted on the selected physical channel.
A step in which the broadcasting station database generation unit analyzes the acquired digital information, extracts broadcasting signal information including information for identifying the broadcasting station, and generates a broadcasting station database using the extracted broadcasting signal information.
A broadcasting receiving method including a step in which a broadcasting station list generation unit generates a broadcasting station list by referring to the generated broadcasting station database when a channel scan request is input.

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