JP5194877B2 - Terrestrial digital broadcast receiving apparatus, terrestrial digital broadcast receiving method, and terrestrial digital broadcast receiving program - Google Patents

Description

  The present invention relates to a terrestrial digital broadcast receiving apparatus, a terrestrial digital broadcast receiving method, and a terrestrial digital broadcast receiving program.

Conventionally, there has been known a terrestrial digital broadcast receiving apparatus capable of acquiring in advance program information related to programs provided from all viewable broadcast stations (see, for example, Patent Document 1). As a result, if it is a terrestrial digital broadcast receiving apparatus that can simultaneously tune a plurality of broadcast stations, one tuner can be allocated for viewing and another tuner can be used for program information during that time. Therefore, the program information can be presented to the viewer without losing the image and sound (image sound).
JP 2004-207978 A

  However, when only one broadcasting station can be tuned at the same time in the terrestrial digital broadcast receiving apparatus described in the above-mentioned patent document, in order to obtain program information of all the broadcasting stations, the presentation of image sounds to viewers is stopped during that time. There was an inconvenience that had to be done. Moreover, it takes a lot of time to acquire program information of all broadcasting stations. For this reason, the image and sound stop time hinders the viewer from enjoying smooth image and sound.

  Also, in a mobile terrestrial digital broadcast receiving apparatus, the presentation format when the viewer receives the presentation of program information is a radio TV column (late column) that is published in the TV column of a newspaper called a program guide. Many expressions are used. A display screen in a mobile terrestrial digital broadcast receiver often uses a smaller screen than a fixed screen. Therefore, the amount of program information that can be displayed on one screen is significantly limited with respect to the program information of all broadcast stations that can be viewed. The viewer can correctly find a favorite program if the information in the currently displayed program guide is always the latest information. However, as in the above-mentioned patent document, receiving program information of all broadcast stations in advance means that the program information may always change due to the convenience of the broadcast station. Are not efficient because they cannot see the latest information.

  In the case of a mobile terrestrial digital broadcast receiver, the strength of the received radio waves changes every moment due to movement. Therefore, even if the viewer finds a favorite program based on the program information received in advance, the degree of the quality of the reception situation, including whether or not it can newly receive the image sound of the broadcasting station, I couldn't judge until I tried. When the reception situation is extremely bad and the presentation of the image sound cannot be received, the viewer receives the presentation of the program information again and has to search for another favorite program. Such actions are time consuming and very annoying. At this time, if the viewer can grasp the reception status of the program information in real time, the viewer can be presented with the program information again and can save the trouble of searching for another program.

An object of the present invention is to enable a viewer to grasp the reception status of program information in real time.

In order to solve the above-described problem, a terrestrial digital broadcast receiver according to claim 1 is provided.
A receiving unit for receiving a plurality of broadcast signals transmitted from each of a plurality of broadcasting stations;
Based on each broadcast signal received by the receiver, a measurement unit that measures the reception status of each broadcast signal in real time;
A display for displaying information;
A discriminating unit for discriminating whether or not the reception status measured by the measuring unit is not good;
The display color of each program information added to each broadcast signal is changed according to the reception status measured by the measurement unit and displayed on the display unit, and the reception status is determined to be not good by the determination unit. A control unit that prohibits viewing of a program corresponding to program information whose reception status is not good .

According to a second aspect of the invention, the terrestrial digital broadcasting receiving apparatus according to claim 1,
It has an input part to input information,
The controller is
The selection input of program information whose reception status is not good is prohibited through the input unit.

According to a third aspect of the present invention, there is provided a terrestrial digital broadcast receiving method.
A receiving step for receiving a plurality of broadcast signals transmitted from each of a plurality of broadcast stations;
Based on each broadcast signal received by the reception step, a measurement step for measuring the reception status of each broadcast signal in real time;
A determination step for determining whether or not the reception status measured by the measurement step is not good,
The display color of each program information added to each broadcast signal is changed according to the reception status measured in the measurement step and displayed on the display unit, and the reception status is determined to be not good by the determination step. A control step of prohibiting viewing of a program corresponding to program information whose reception status is not good .

The terrestrial digital broadcast program according to the invention of claim 4
Computer
A receiving unit for receiving a plurality of broadcast signals transmitted from each of a plurality of broadcasting stations;
Based on each broadcast signal received by the receiving unit, a measurement unit that measures the reception status of each broadcast signal in real time,
A discriminating unit for discriminating whether or not the reception status measured by the measuring unit is not good;
The display color of each program information added to each broadcast signal is changed in accordance with the reception status measured by the measurement unit and displayed on the display unit, and the reception status is determined to be not good by the determination unit. In this case, the control unit is configured to function as a control unit that prohibits viewing of a program corresponding to program information with poor reception status .

According to the present invention, the viewer can grasp the reception status of the program information in real time.

  Embodiments according to the present invention will be described below in detail with reference to the accompanying drawings. However, the scope of the invention is not limited to the illustrated examples.

  First, the device configuration of the terrestrial digital broadcast receiving device 1 will be described with reference to FIG. The terrestrial digital broadcast receiver 1 is a portable terrestrial digital broadcast receiver. The terrestrial digital broadcast receiving apparatus 1 includes a main control unit 11 as a measurement unit and a control unit, a ROM (Read Only Memory) 12, a RAM (Random Access Memory) 13, and an input device 14 as an input unit. An antenna 15 as a unit, a tuner unit 16, a demodulation unit 17, a video / audio output device 18, a display device 19 as a display unit, a speaker unit 20, and a current position detection unit 21 are configured. Is done.

  The main control unit 11 includes a CPU (Central Processing Unit), and centrally controls each unit of the terrestrial digital broadcast receiving apparatus 1. The ROM 12 is a memory from which information can be read, and particularly stores a program guide display program to be described later. The RAM 13 is a volatile memory for storing and has a work area for developing various programs and various data.

  The main control unit 11 reads a program specified from the system program and various application programs stored in the ROM 12 and data stored in the RAM 13, expands the data in the RAM 13, and stores the programs and data expanded in the RAM 13. Various processes are executed in cooperation with the CPU.

The main control unit 11 measures the reception status of each broadcast signal in real time based on each broadcast signal received by the antenna 15 in cooperation with the program guide display program, and responds to the measured reception status. Information indicating the reception status of each broadcast signal is output.
Here, measuring the reception status of each broadcast signal in real time means whether or not the program information of each broadcast station can be acquired based on the broadcast signal received from each broadcast station in real time (the broadcast signal from the broadcast station). (When receiving). The reception status of each broadcast signal is measured based on, for example, a BER (Bit Error Rate) or C / N (Carrier to Noise) ratio acquired from the demodulator 17 when demodulating the broadcast signal. Further, in the decoding of image and program information, image quality, sound quality, the degree of lack of program information, and the like may be acquired from the video / audio output device 18 and measured.
The information indicating the reception status of each broadcast signal is information indicating the reception status of program information added to each broadcast signal, or the reception status of each broadcast signal by displaying an antenna mark or the like outside the program table 22 described later. This means information etc. Here, the program information is information added to each broadcast signal and refers to information on a program broadcast on each broadcast station. For example, it corresponds to a program name, a program broadcast time, and the like.
In addition, outputting the information indicating the reception status of each broadcast signal according to the reception status means, for example, changing the display mode of each program information to be displayed on the display device 19 according to the reception status. Changing the display mode of each program information according to the reception status means, for example, changing the display color of each program information according to the reception status to display on the display device 19.

  The input device 14 includes, for example, various keys for inputting various operation signals, and outputs various operation signals to the main control unit 11 when operated by a viewer.

  The antenna 15 receives a broadcast wave (broadcast signal) of terrestrial digital broadcasting. Then, a terrestrial digital broadcast signal (RF (Radio Frequency) signal) is output to the tuner unit 16.

  The tuner unit 16 includes a mixer, a channel selection circuit, an A / D conversion circuit (all not shown), and the like. Specifically, the tuner 16 selects a broadcast signal of a channel that broadcasts a program desired by the viewer from the RF signal input from the antenna 15 by a mixer, a channel selection circuit, and the like, and the selected broadcast signal is IF. Convert to (Intermediate Frequency) signal. Then, the IF signal is converted into digital data by the A / D conversion circuit. The converted digital data is output to the demodulator 17.

  The demodulation unit 17 performs demodulation processing on the digital data from the tuner unit 16. Then, the demodulated demodulated signal is output to the main control unit 11. The demodulated signal is output to the video / audio output device 18 via the main control unit 11. Further, the demodulator 17 includes all demodulators capable of demodulating video / audio data of a broadcasting system corresponding to the terrestrial digital broadcast receiver 1 and data relating to a broadcast program.

  The video / audio output device 18 decodes (converts) the demodulated signal output by the main control unit 11 into visible video or visible sound. Then, the converted video is output to the display device 19 and the converted audio is output to the speaker unit 20.

  The display device 19 includes, for example, an LCD (Liquid Crystal Display), a PDP (Plasma Display Panel), and the like, and displays the video output from the video / audio output device 18.

  The speaker unit 20 includes a speaker and the like, and outputs the sound output from the video / audio output device 18.

  The current position detection unit 21 includes, for example, a gyro sensor, a GPS positioning unit, and the like, detects current position information of the terrestrial digital broadcast receiver 1 itself, and performs main control on a current position detection signal based on the detected current position information. To the unit 11.

  Next, the program table 22 displayed on the display device 19 will be described with reference to FIG. The program guide 22 is composed of all or part of program information. Specifically, the program table 22 forms a grid with the horizontal axis as broadcasting stations and the vertical axis as broadcasting time. An area where the time (broadcast time) intersects with the grid of the broadcast station indicates program information (program name, broadcast time).

  In the case of the program table 22 shown in FIG. 2, “PM1” to “PM4” representing 1 to 4 pm for three broadcasting stations “A broadcasting station”, “B broadcasting station”, and “C broadcasting station” on one screen. "" Is displayed. A cursor is placed on the program guide 22 for viewer operation. For example, it is assumed that the viewer is watching “Entertainment XX” of “B broadcast station” (that is, the B broadcast station is selected), and the display of the program guide is performed from that state. In this case, the initial position of the cursor is assumed to be “Entertainment OO”. At this time, in addition to the currently selected “B broadcast station”, “A broadcast station” and “C broadcast station” are also displayed in the program table 22.

  Next, the program guide 31 displayed on the display device 19 will be described with reference to FIG. The program table 31 shows an example of displaying the display mode of each program information according to the measurement result when the reception status of the broadcast signal for broadcasting each program is measured. For example, “B broadcasting station” is displayed in the same manner as when the program guide is first displayed (when the program guide 22 is displayed). This indicates that the reception status is currently good and that a good image sound can be continuously presented to the viewer.

  Here, regarding “A broadcast station”, the background color for displaying the program information changes from when the program guide is first displayed (when the program guide 22 is displayed). This indicates that the reception status is currently bad and program information cannot be acquired. As for “C broadcast station”, the background color for displaying program information changes when the program guide is first displayed (when the program guide 22 is displayed) and is different from “A broadcast station”. It is a color. This indicates that the reception status is currently not good and the program information can be acquired, but a good image sound cannot be presented to the viewer. The change in the background color of the program information reflects the measurement result of the reception status, and the measurement and the display of the measurement result are repeatedly performed.

  Next, with reference to FIG. 4, the program guide display process executed by the main control unit 11 of the terrestrial digital broadcast receiving apparatus 1 will be described. The program guide display process is a process for causing the display device 19 to display program information of each broadcasting station according to the reception status.

  For example, the program table display program read from the ROM 12 and appropriately expanded in the RAM 13 triggered by the input of the execution instruction of the program table display process by the user via the input device 14, and the main control unit 11. The program guide display process is executed in cooperation with.

  Here, a receivable broadcast station is searched in advance upon initial power-on or by a viewer's operation, and information on the receivable broadcast station frequency and broadcast station is stored in a table (receivable frequency table) in the RAM 13. It is assumed that The receivable frequency table is used for specifying a channel selection destination at the time of channel switching (channel selection) by a viewer. A channel is selected by the viewer via the input device 14, and program information of the selected channel is stored in the RAM 13. The program guide display process under the above conditions will be described.

  First, a program guide is displayed based on program information (accumulated information) accumulated in the past (step S11). Specifically, a program guide is created based on the program information stored in the RAM 13 at the present time, and the created program guide is displayed on the display device 19.

  Then, the list of broadcast stations and the time zone currently displayed are stored (step S12). For example, it is assumed that “A broadcasting station”, “B broadcasting station”, “C broadcasting station”, and time zones “PM1” to “PM4” are currently displayed. In this case, “A broadcast station”, “B broadcast station”, “C broadcast station” information as a list of broadcast stations, and “PM1” to “PM4” as time zones are recorded (stored) in the RAM 13. Thereby, for example, when acquiring program information of other stations, the stored broadcast station list and time zone are referred to, so that the broadcast station and the time zone whose reception status should be measured are clarified.

  After execution of step S12, program information acquisition and reception status measurement are started (step S13). That is, measurement of program information and reception status of each broadcast station in the list of broadcast stations stored in the RAM 13 is started.

  Then, the list is referred to, and the next broadcast station is selected (step S14). Specifically, in step S12, a list of broadcast stations stored in the RAM 13 is referred to, and a broadcast station different from the currently selected broadcast station is selected from the list. Here, the broadcasting stations may be selected from the list stored in the RAM 13 in order, or a certain broadcasting station is weighted, and the tuning is performed in the order of the weighted broadcasting stations. But you can.

  After execution of step S14, the reception status of the selected broadcast station is measured, and program information in the time zone described in the program guide is acquired (step S15). The reception status may be measured by demodulating the broadcast signal from the BER or C / N ratio acquired from the demodulator 17, or in the decoding of image and program information, image quality, sound quality, program The degree of information loss may be measured. Here, the measurement of the reception state is performed in real time (at the time of receiving a broadcast signal from a broadcast station). Moreover, regarding the acquisition of program information, it is possible to speed up the transition to the next processing by limiting to the time zone described in the program guide, but other time zones may be acquired. If only the reception status is updated without updating the program information, the program information may not be acquired.

  Then, it is determined whether or not the program information has been acquired (step S16). Specifically, for example, “the worst state in which even program information cannot be acquired” “the program information can be acquired but the BER is not good and is not suitable for image sound presentation” “the program information can be acquired and the BER is good Based on the three criteria “state suitable for sound presentation”, it is determined whether or not the program information has been acquired by determining the result of the reception status.

  If it is determined in step S16 that the program information could not be acquired (step S16; NO), the program table is updated according to the acquired reception status “worst” (“worst state where even program information cannot be acquired”) ( Step S21). That is, the program table is updated to a display mode indicating that the program information cannot be acquired because the reception status is currently bad, and the updated program table is displayed on the display device 19. This step corresponds to the display mode of program information at “C broadcasting station” in the program guide 31 of FIG. After execution of step S21, the process proceeds to step S20 described later.

  If it is determined in step S16 that the program information has been acquired (step S16; YES), the program guide is updated with the newly acquired program information (step S17). Then, it is determined whether or not the measurement result of the reception status is good (“the program information can be acquired and the BER is good and suitable for image presentation”) (step S18). That is, it is determined whether or not the measurement result of the reception status is good based on a broadcast signal that broadcasts a newly acquired program information program.

  If it is determined in step S18 that the measurement result of the reception status is not good (step S18; NO), the acquired reception status “bad” (“program information can be acquired, but the BER is not good, and is suitable for presenting image and sound. The program table is updated in accordance with “No state”) (step S22). In other words, the program table is updated to a display mode indicating that the reception status is currently bad and the image sound cannot be presented, and the updated program table is displayed on the display device 19. This step corresponds to the display mode of the program information at “A broadcasting station” in the program guide 31 of FIG. After execution of step S22, the process proceeds to step S20 described later.

  If it is determined in step S18 that the measurement result of the reception status is good (step S18; YES), the program guide is updated with the acquired reception status (step S19). That is, the program table is updated to a display mode indicating that the reception status is currently good and the image sound can be presented, and the updated program table is displayed on the display device 19. This step corresponds to the display mode of program information at “B broadcasting station” in the program guide 31 of FIG.

  After execution of step S19, it is determined whether or not an end instruction has been received via the input device 14 by the viewer's input (step S20). If it is determined that an end instruction has not been received (step S21; NO), an operation instruction for cursor movement is received via the input device 14 (step S23). After execution of step S23, the process proceeds to step S12.

  Here, for example, the display screen 31 shown in FIG. 3 is displayed on the display device 19, and an operation of moving the cursor to the right via the input device 14 (operation corresponding to step S23) is received from the viewer. To do. In this case, the display screen 51 shown in FIG. That is, the program information of “D broadcasting station” appears in the right column. And it transfers to step S12 and the information of "D broadcasting station" is memorize | stored in a list | wrist. And the process of step S13-S20 is performed similarly.

  Here, in the display screen 51 shown in FIG. 5, since the program information of “C broadcasting station” has the worst reception status, the viewer cannot receive the program image sound. Further, the program information of “C broadcasting station” is not the latest program information. For this reason, for example, even if the viewer moves the cursor to the program information “Merengue XX” and receives the presentation of the image sound, the image sound cannot be presented (see FIG. 5). In this case, for example, the display screen 61 shown in FIG.

  The display screen 61 is a screen indicating that viewing of a program corresponding to program information with poor reception status is prohibited when the reception status is not good (for example, when the reception status is worst). For example, in the display screen 61, it is assumed that “C broadcasting station” is the broadcasting station with the worst reception status. In this case, the viewer cannot select and input program information of “C broadcasting station” with the cursor. Specifically, the selection input of the program information of “C broadcast station” whose reception status is not good is prohibited through the input device 14, and the viewing of the program of “C broadcast station” is prohibited. In this case, when the viewer operates the cursor via the input device 14 to select and input program information of “C broadcast station”, the program information of the cursor “D broadcast station” (for example, the program information “king-like” Go to XX ”). Thereby, it can prevent that a viewer selects the program which cannot present an image sound accidentally.

  If it is determined in step S20 that an end instruction has been received (step S20; YES), the program information display process is ended.

  As described above, according to the present embodiment, the main control unit 11 outputs each program information added to each broadcast signal according to the reception status. Thereby, since the program information is output according to the reception status measured in real time, the viewer can grasp the reception status of the program information in real time by referring to the output program information. In addition, when there is a favorite program in the program information, the viewer can easily know the reception status regarding the favorite program.

  Moreover, the display mode of each program information can be changed according to the reception status and displayed on the display device 19. Specifically, the display color of each program information can be changed on the display device 19 according to the reception status.

  Also, viewing of a program corresponding to program information whose reception status is not good is prohibited. As a result, it is possible to prevent the viewer from erroneously selecting or reserving a program with poor reception status.

  In addition, selection input of program information with poor reception status can be prohibited via the input device 14.

The description in the above embodiment is an example of the terrestrial digital broadcast receiving apparatus, the terrestrial digital broadcast receiving method, and the terrestrial digital broadcast receiving program according to the present invention, and is not limited thereto.

  For example, in the above embodiment, the viewer is notified of the reception status by a display form that changes the display color (background color) of the program guide. However, the present invention is not limited to this. For example, a display form such as an antenna bar, a bar graph, or a decibel display as displayed on a display unit of a mobile phone may be used. Specifically, according to the reception status, an antenna mark or the like corresponding to the reception status may be displayed outside the program guide 22 to indicate the reception status of each broadcast signal. Further, instead of the screen display, the viewer may be notified of the reception status by sound (voice guidance or beep sound level) when the cursor moves.

  Further, in step S16 of the program information display process, “the worst state in which even program information cannot be acquired” “the program information can be acquired but the BER is not good and is not suitable for image display” “program information can be acquired and the BER It is determined whether or not the program information has been acquired based on the three criteria of “a state that is good and suitable for presentation of image sound”, but is not limited to this. For example, the determination may be performed using other criteria, or the number of steps to be determined may be further increased or decreased.

  In the above embodiment, when there is a broadcasting station having the worst reception status (“C broadcasting station”), the selection input of program information of “C broadcasting station” is prohibited by the cursor. However, the present invention is not limited to this. It is not something. For example, a message such as “Reservation of program of“ C broadcast station ”, restriction of recording reservation of program of“ C broadcast station ”,“ May not be viewable ”when selecting“ C broadcast station ”, etc. Display a message that recommends viewing a program of another broadcasting station of the same series that may be received, present a location and orientation that can be viewed with a cursor, and broadcast using a telephone network or the Internet network It is good also as switching to. Thereby, since the alternative viewing means of the broadcasting station that can be received can be provided, the viewer can view the receivable broadcasting station.

  In addition, the detailed configuration and detailed operation of the terrestrial digital broadcast receiving apparatus 1 in the above embodiment can be changed as appropriate without departing from the spirit of the present invention.

It is a block diagram of the terrestrial digital broadcast receiver which concerns on this invention. It is the figure which showed the display screen. It is the figure which showed the display screen after reception condition measurement. It is a flowchart which shows the flow of a program schedule display process. It is the figure which showed the display screen after cursor movement operation. It is the figure which showed the display screen after cursor movement operation.

Explanation of symbols

1 Terrestrial digital broadcast receiver 11 Main controller 12 ROM
13 RAM
14 Input Device 15 Antenna 16 Tuner 17 Demodulator 18 Video / Audio Output Device 19 Display Device 20 Speaker Unit 21 Current Position Detection Unit

Claims (4)

A receiving unit for receiving a plurality of broadcast signals transmitted from each of a plurality of broadcasting stations;
Based on each broadcast signal received by the receiver, a measurement unit that measures the reception status of each broadcast signal in real time;
A display for displaying information;
A discriminating unit for discriminating whether or not the reception status measured by the measuring unit is not good;
The display color of each program information added to each broadcast signal is changed according to the reception status measured by the measurement unit and displayed on the display unit, and the reception status is determined to be not good by the determination unit. A control unit that prohibits viewing of the program corresponding to the program information with poor reception status ,
A terrestrial digital broadcast receiver. It has an input part to input information,
The controller is
The terrestrial digital broadcast receiving apparatus according to claim 1, wherein selection input of program information with poor reception status is prohibited via the input unit. A receiving step for receiving a plurality of broadcast signals transmitted from each of a plurality of broadcast stations;
Based on each broadcast signal received by the reception step, a measurement step for measuring the reception status of each broadcast signal in real time;
A determination step for determining whether or not the reception status measured by the measurement step is not good,
The display color of each program information added to each broadcast signal is changed according to the reception status measured in the measurement step and displayed on the display unit, and the reception status is determined to be not good by the determination step. A control process for prohibiting viewing of the program corresponding to the program information with poor reception status;
Including terrestrial digital broadcasting. Computer
A receiving unit for receiving a plurality of broadcast signals transmitted from each of a plurality of broadcasting stations;
Based on each broadcast signal received by the receiving unit, a measurement unit that measures the reception status of each broadcast signal in real time,
A discriminating unit for discriminating whether or not the reception status measured by the measuring unit is not good;
The display color of each program information added to each broadcast signal is changed in accordance with the reception status measured by the measurement unit and displayed on the display unit, and the reception status is determined to be not good by the determination unit. A control unit that prohibits viewing of a program corresponding to program information with poor reception status;
Terrestrial digital broadcast reception program to function as.

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