JP2015019135A - Digital broadcast receiving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital broadcast receiving device capable of improving convenience of channel selection.SOLUTION: In a case where a full-segment fixed mode is set, when selecting a channel while switching a broadcast station in a channel order, a reception state of a reception system for a digital broadcast wave transmitted by the next station is determined, and when in a reception state where full-segment broadcast cannot be received, it is excluded from output targets.

Description

  The present invention relates to a digital broadcast receiving apparatus that receives terrestrial digital broadcasts.

  Patent Document 1 generates a channel list in which information (radio wave conditions) related to each of 1-segment terrestrial digital broadcasting (hereinafter referred to as one-segment broadcasting) and 12-segment terrestrial digital broadcasting (hereinafter referred to as full-segment broadcasting) is mixed. However, a digital broadcast receiving apparatus that updates a list in response to an instruction from the outside is disclosed.

Japanese Patent No. 2008-136084

Conventionally, automatic switching mode that automatically switches between reception of 1Seg broadcasting and full Seg broadcasting according to the radio wave condition, and fixed mode that is fixed to receive either 1Seg broadcasting or Full Seg broadcasting regardless of the radio wave condition can be selected There is a digital broadcast receiver.
However, conventionally, even when the fixed mode as described above is set, when channel selection is performed with the channel switching button, the next station registered in the channel list is selected.
For example, when a fixed mode (hereinafter referred to as a full-segment fixed mode) that is fixed to receive full-segment broadcasting is set, even if the channel cannot receive full-segment broadcasting due to changes in radio wave conditions, this channel is not included in the channel list. Channels are selected according to the order of registration.
In this case, the user needs to switch to another channel that can be received from this channel, which is not convenient.

  Also, in the past, when full-segment fixed mode is set and the reception of full-segment broadcasting becomes impossible due to changes in radio wave conditions, the screen displaying the broadcast content only freezes or becomes a black screen. It was. For this reason, the user could not know whether or not one-segment broadcasting with the same broadcast content can be received.

Note that, as in Patent Document 1, it is possible to know which one of the one-segment broadcasting and the full-segment broadcasting can be received by using a channel list in which the radio wave conditions of the one-segment broadcasting and the full-segment broadcasting are mixed.
However, in this channel list, even if the full seg fixed mode is set, it is possible to select a channel by one seg broadcasting, and thus it is not possible to satisfy the user's desire to view only with high image quality.

  In Patent Document 1, the radio wave status of the channel list is updated when an instruction is given from the outside. For this reason, in consideration of the possibility that the radio wave condition may change between when the channel list is generated and when the user confirms the list, the radio wave condition must be updated each time the list is confirmed. Therefore, there is a problem that convenience is poor and a list update time is required every time the list is confirmed.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a digital broadcast receiving apparatus that can improve the convenience of channel selection.

  The digital broadcast receiving apparatus according to the present invention is a digital broadcast receiving apparatus having a reception system having a reception function of full-segment broadcasting and one-segment broadcasting, and when a full-segment fixed mode for fixing to reception of full-segment broadcasting is set. When switching the broadcasting station in the channel order and selecting a channel, the control unit determines the reception status of the digital broadcast wave transmitted by the next station according to the reception system, and excludes it from the output target if it is a reception status incapable of receiving full-segment broadcasting. Is provided.

  According to the present invention, there is an effect that the convenience of channel selection can be improved.

It is a block diagram which shows the structure of the digital broadcast receiver which concerns on Embodiment 1 of this invention. 3 is a flowchart showing an operation of the digital broadcast receiving apparatus according to the first embodiment. It is a flowchart which shows operation | movement of the digital broadcast receiver which concerns on Embodiment 2 of this invention. 10 is a diagram illustrating an example of an inquiry screen according to Embodiment 2. FIG. FIG. 10 is a diagram showing an example of a reception impossibility notification screen in the second embodiment. It is a block diagram which shows the structure of the digital broadcast receiver which concerns on Embodiment 3 of this invention. FIG. 23 is a diagram showing an example of a channel list in the third embodiment.

Embodiment 1 FIG.
1 is a block diagram showing a configuration of a digital broadcast receiving apparatus according to Embodiment 1 of the present invention. This digital broadcast receiving apparatus is a digital broadcast receiving apparatus that is mounted on a mobile body (for example, a vehicle) and has a function of receiving full-segment broadcasting and one-segment broadcasting of digital television broadcasting. As shown in FIG. 1, an antenna 10, a tuner unit 11, an OFDM (Orthogonal Frequency Division Multiplexing) demodulating unit 12, a decoder unit 13, a control unit 14, a display unit 15, and an input unit 16 are included. Is provided.
Although FIG. 1 shows the case where only one receiving system including the antenna 10, the tuner unit 11, the OFDM demodulating unit 12, and the decoder unit 13 is provided, it may have a plurality of receiving systems.

The antenna 10 is an antenna that receives a digital television broadcast.
The tuner unit 11 converts an RF (high frequency) band broadcast wave received by the antenna 10 into an IF (intermediate frequency) signal.
The OFDM demodulator 12 demodulates the digital signal of the IF signal output from the tuner unit 11 and outputs a TS (Transport Stream) signal.
The decoder unit 13 decodes the TS signal output from the OFDM demodulator 12 into video, audio, and data.

In the digital broadcast receiving apparatus according to the present invention, three reception modes, that is, an automatic switching mode, a full segment fixed mode, and a one segment fixed mode can be set. Here, the one-segment fixed mode is a reception mode that is fixed to reception of one-segment broadcasting.
The control unit 14 is a control unit that controls reception of the digital broadcast by the above-described reception system. In particular, when the full-seg fixed mode is set, when the broadcast station is switched and selected in the channel order, the next station The reception state of the digital broadcast wave to be transmitted by the reception system is determined, and if it is a reception state in which full-segment broadcasting cannot be received, it is excluded from the output target.
For example, it is determined from the RS (Reed-Solomon) decoding state in the demodulation processing of the OFDM demodulator 12 whether or not it is a receiving state in which full segment broadcasting can be received. 15 to be excluded from the target to be displayed in FIG.

The display unit 15 is a display unit that displays the video and data decoded by the decoder unit 13.
The display unit 15 also displays a screen that is instructed by the control unit 14 and decoded by the decoder unit 13. Examples of this screen include an inquiry screen described later in Embodiment 2 and a reception impossibility notification screen.
The input unit 16 is an input unit that receives a setting input from a user and sets the input content in the control unit 14. For example, it includes hardware for input such as operation keys, operation buttons, and a touch panel, and software that outputs an input signal input thereto to the control unit 14.

Next, the operation will be described.
FIG. 2 is a flowchart showing the operation of the digital broadcast receiving apparatus according to the first embodiment, and shows the operation of selecting a station by switching the broadcasting station in the channel order. Further, it is assumed that the full-segment fixed mode is set in the digital broadcast receiving apparatus.

  When the user performs channel switching using the input unit 16 (for example, pressing a channel switching button), the control unit 14 selects the next station in the preset channel order (step ST1). At this time, the next station is a so-called output target broadcast station that decodes the broadcast program from the received broadcast wave and displays it on the display unit 15.

  Next, the OFDM demodulation unit 12 demodulates the digital broadcast wave received from the next station using the antenna 10 and the tuner unit 11. At this time, the OFDM demodulator 12 determines an RS (Reed Solomon) decoding state with respect to the output of the tuner unit 11, and outputs the result to the controller 14 (step ST2). For example, the OFDM demodulator 12 demodulates the IF signal input from the tuner unit 11 to generate a TS signal, and performs RS (Reed Solomon) error correction processing on the TS packet in this TS signal. It can be determined from the error correction result (RS decoding state) whether or not it is in a receiving state in which full segment broadcasting can be received.

Based on the RS decoding state input from OFDM demodulator 12, control unit 14 determines whether or not it is in a reception state in which the next station can receive full-segment broadcasting (step ST3).
If it is determined that the next station cannot receive full-segment broadcasting (step ST3; NO), the control unit 14 excludes the next station from the output target, returns to step ST1, and further selects the next station on the channel. Channel selection is performed, and the above-described processing is repeated until the station is capable of receiving full-segment broadcasting.
As described above, in the first embodiment, when the full segment fixed mode is set, broadcast stations that cannot receive full segment broadcast are excluded from the output targets in channel switching and skipped. As a result, even if full-segment broadcasting cannot be received, a black screen is not displayed as an output target as in the conventional case, and an extra operation for switching this is also omitted.

  If it is determined that full-segment broadcasting of the next station can be received (step ST3; YES), the control unit 14 instructs the decoder unit 13 to decode the TS signal from this station (step ST4) and display it. To the unit 15. The display unit 15 displays a full-seg broadcast program (broadcast content) transmitted by the selected next station (step ST5). Thereby, the user can view a high-quality program by full segment.

  As described above, according to the first embodiment, when the full-seg fixed mode is set, when the broadcast station is switched in the channel order and selected, the digital broadcast wave received by the next station is received by the reception system. A control unit 14 is provided that determines the state and excludes it from the output target if it is in a reception state in which full-segment broadcasting cannot be received. With this configuration, a broadcasting station that cannot receive full-segment broadcasting at the time of channel selection is skipped. For this reason, a broadcasting station that cannot receive full-segment broadcasting as in the past is not selected, and the convenience of channel selection can be improved.

Embodiment 2. FIG.
In the second embodiment, the full seg fixed mode is set. However, the radio wave condition has changed and the reception of the full seg broadcast becomes impossible. However, when the one seg broadcast can be received, the broadcast is sent to the user. This is to select whether to continue outputting contents or to receive full-segment broadcasting. The digital broadcast receiving apparatus according to the second embodiment is basically the same as the configuration shown in FIG.

Next, the operation will be described.
FIG. 3 is a flowchart showing the operation of the digital broadcast receiving apparatus according to Embodiment 2 of the present invention, and shows the operation in the case where the full-seg broadcast that was being watched cannot be received due to a change in the radio wave condition. It is assumed that the full segment fixed mode is set in this digital broadcast receiving apparatus.

The control unit 14 instructs the tuner unit 11 to receive the one-segment broadcast (the same broadcast content in the simulcast) when reception of the full-segment broadcast is disabled based on the information regarding the reception state of the full-segment broadcast input from the OFDM demodulator 12. 1seg broadcasting).
Subsequently, the control unit 14 determines whether or not the one-seg broadcast can be received based on the information regarding the reception state of the one-seg broadcast input from the OFDM demodulator 12 (step ST1a).

  When the one-segment broadcasting can be received (step ST1a; YES), the control unit 14 instructs the decoder unit 13 to display an inquiry screen as shown in FIG. 4 on the display unit 15 (step ST2a). The inquiry screen in FIG. 4 is a screen for notifying the user that reception of full-segment broadcasting is disabled but reception is possible for one-segment broadcasting, and inquiring whether to switch reception to one-segment broadcasting.

  When the user presses the “one seg switching button” on the inquiry screen shown in FIG. 4 using the input unit 16 (step ST3a), the control unit 14 instructs the tuner unit 11 to switch to receiving one seg broadcasting ( Step ST4a). Thereby, the broadcast content of the one-segment broadcasting is decoded via the OFDM demodulating unit 12 and the decoder unit 13, and the display unit 15 displays the program of the one-segment broadcasting (step ST5a).

When watching full-segment broadcasting as described above, if full-segment broadcasting cannot be received due to changes in radio wave conditions, switching to one-segment broadcasting with the same broadcast content as this full-segment broadcasting generally occurs frequently. It becomes a so-called chattering state.
Therefore, even in the full segment fixed mode, when reception of full segment broadcasting is disabled, the user is inquired about whether to switch to one segment broadcasting, and switching is performed after confirming the user's intention. This eliminates the annoyance of switching between one-segment broadcasting and full-segment broadcasting regardless of the user's intention, and enables switching according to the user's intention.

After switching to reception of one-segment broadcasting in step ST5a, the control unit 14 instructs the tuner unit 11 to complete the full-segment broadcasting of the same broadcasting content as the one-segment broadcasting (originally). It is determined whether or not it is possible to receive (full-segment broadcasting that was being watched).
At this time, when reception of full segment broadcasting becomes possible, the control unit 14 instructs the tuner unit 11 to automatically switch to reception of this full segment broadcasting.
When the full segment fixed mode is set, priority can be given to reception of a full segment broadcast desired by the user.

  On the other hand, when the user presses the “affiliation station search button” shown in FIG. 4 using the input unit 16 or when no operation is performed for a certain time after the inquiry screen is displayed (step ST6a), the control unit 14 instructs the tuner unit 11 to search the affiliated station of the full-seg broadcasting that was being viewed (step ST7a).

When there is an affiliated station that can receive full-segment broadcasting (step ST8a; YES), the control unit 14 instructs the tuner unit 11 to select this affiliated station (step ST9a).
Thereby, the broadcast content of the full segment broadcast is decoded via the OFDM demodulator 12 and the decoder unit 13, and the display unit 15 displays the full segment broadcast program from the affiliated station (step ST5a).

When there is no affiliated station capable of receiving full-segment broadcasting (step ST8a; NO), the control unit 14 determines whether there is an affiliated station capable of receiving one-segment broadcasting among the affiliated stations of the full-segment broadcasting that has been viewed. (Step ST10a).
When it is determined that there is an affiliated station that can receive the one-segment broadcasting (step ST10a; YES), the process returns to step ST2a to inquire about switching to the reception of the one-segment broadcasting.

  When it is determined that there is no affiliated station capable of receiving the one-segment broadcasting (step ST10a; NO), the control unit 14 instructs the decoder unit 13 to display the reception impossibility notification screen illustrated in FIG. Step ST11a). Thereafter, the control unit 14 shifts to a waiting state for a certain time in anticipation of the radio wave condition changing (step ST12a). After the waiting time has elapsed, the process returns to step ST7a, and the affiliated station search is executed again.

In step ST2a and step ST11a, the screen is displayed on the display unit 15. However, it may be informed by voice that an inquiry or reception is impossible.
Further, the button operation in step ST3a and step ST6a may be a voice recognition operation.

  As described above, according to the second embodiment, when the control unit 14 cannot receive full-segment broadcasting but determines that the reception state is one-segment broadcasting reception, the control unit 14 notifies the user to that effect. To do. In this way, the user can grasp whether or not the user can continue watching with the one-segment broadcasting even if the reception of the full-segment broadcasting is impossible while watching the full-segment broadcasting program. Can do. Thereby, switching between one-segment broadcasting and full-segment broadcasting can be performed according to the intention of the user.

  Further, according to the second embodiment, when the control unit 14 can receive full-segment broadcasting after switching to reception of one-segment broadcasting in response to the above notification, Automatically switch to receiving full-segment broadcasting. In this way, when the full segment fixed mode is set, priority can be given to reception of the full segment broadcast desired by the user.

Embodiment 3 FIG.
FIG. 6 is a block diagram showing a configuration of a digital broadcast receiving apparatus according to Embodiment 3 of the present invention. This digital broadcast receiving apparatus is a digital broadcast receiving apparatus that is mounted on a mobile body (for example, a vehicle) and has a function of receiving full-segment broadcasting and one-segment broadcasting of digital television broadcasting. As shown in FIG. 6, unlike the first embodiment, a first reception system including an antenna 20, a tuner unit 21, an OFDM demodulation unit 22, and a decoder unit 23, an antenna 30, a tuner unit 31, an OFDM demodulation unit 32, and A second receiving system comprising a decoder unit 33;
A control unit 40, a display unit 50, and an input unit 60 are provided. In addition, you may provide the 3rd or more receiving system.

In the third embodiment, the control unit 40 instructs either one of the first and second reception systems to perform a periodic broadcast station search, and sets the reception status of the one-segment broadcasting and the full-segment broadcasting for each channel. Acquire and generate a channel list.
FIG. 7 is a diagram showing an example of a channel list in the third embodiment. The control unit 40 displays a channel list as shown in FIG. 7 on the display unit 50 to notify the user of the reception status of the one-segment broadcasting and the full-segment broadcasting for each channel.
In FIG. 7, the numerical value with the symbol a is the channel number, the column with the symbol b is the reception status of the full segment broadcast, the column with the symbol c is the reception status of the one-segment broadcast, and the numerical value with the symbol d is physical. The column with the channel number and symbol e is the broadcast station name, and the column with symbol f is the program title. Broadcast stations A to D are the stations with the best reception status among the affiliated stations.

  The user can know the reception states of the one-segment broadcasting and the full-segment broadcasting for each channel by referring to the channel list as shown in FIG. Thus, the user can switch channels while watching the reception status of each broadcast, and the convenience of channel selection can be improved.

  Further, when the full segment fixed mode is set, the control unit 40 may display only the channel of the broadcasting station capable of receiving full segment broadcasting on the display unit 50 in the channel list. This prevents the user from selecting a channel that cannot receive full-segment broadcasting.

Further, when the full-segment fixed mode is set, the control unit 40 displays different display modes in the channel list between the channel of the broadcasting station capable of receiving full-segment broadcasting and the channel of a broadcasting station capable of receiving only one-segment broadcasting. It is not necessary to accept the selection of a broadcasting station that can receive only one-segment broadcasting.
For example, a gray display is used in which the character color is changed in data of a broadcasting station that can receive only one-segment broadcasting (rows including codes a to f in FIG. 7). At this time, the control unit 40 does not accept channel selection using the input unit 60. In the case of FIG. 7, the data of channel “4” is displayed in different display modes. This can also prevent a channel that cannot receive full-segment broadcasting from being selected.

  In addition, when the radio wave condition changes during reception of full-segment broadcasting and this channel becomes a broadcasting station capable of receiving only one-segment broadcasting, when this station is selected using the input unit 60, The inquiry screen shown in FIG. 4 may be displayed on the display unit 50 to confirm whether or not to switch to the user.

  As described above, according to the third embodiment, a plurality of reception systems including the antennas 20 and 30, the tuner units 21 and 31, the OFDM demodulation units 22 and 32, and the decoder units 23 and 33 are provided. Each of the stations searches whether or not full-segment broadcasting and one-segment broadcasting can be received for each broadcasting station, and the control unit 40 confirms the reception status based on the search result of the broadcasting station, thereby broadcasting. The user is notified of the reception status of full-segment broadcasting and one-segment broadcasting for each station channel. With this configuration, the user can switch channels while viewing the reception status of each broadcast, and the convenience of channel selection can be improved.

Further, according to the third embodiment, the control unit 40 displays the channel list indicating the reception status of the full-segment broadcasting and the one-segment broadcasting for each channel of the broadcasting station on the display unit 41, and the full-segment fixed mode is set. In the channel list, only the channels of broadcasting stations that can receive full-segment broadcasting are displayed in the channel list, or broadcasting stations that can receive full-segment broadcasting and broadcasting stations that can receive only one-segment broadcasting. The channel is displayed in a different display mode, and channel selection of a broadcast station that can receive only one-segment broadcasting is not accepted.
In this way, it is possible to prevent a channel from being unable to receive full-segment broadcasting from being selected.

  In the present invention, within the scope of the invention, any combination of each embodiment, any component of each embodiment can be modified, or any component can be omitted in each embodiment. .

  10, 20, 30 antenna, 11, 21, 31 tuner unit, 12, 22, 32 OFDM demodulator unit, 13, 23, 33 decoder unit, 14, 40 control unit, 15, 50 display unit, 16, 60 input unit.

Claims (5)

A digital broadcast receiving device having a receiving system having a receiving function of full-segment broadcasting and one-segment broadcasting,
When the full-seg fixed mode for fixing full-seg broadcasting reception is set, when selecting a station by switching the broadcasting station in the channel order, the reception status of the digital broadcasting wave transmitted by the next station is determined by the receiving system, and the full-segment broadcasting is selected. A digital broadcast receiving apparatus including a control unit that is excluded from an output target if it is in a reception state where broadcast cannot be received.   2. The digital broadcasting according to claim 1, wherein the control unit notifies the user when it is determined that it is in a receiving state in which the full-segment broadcasting cannot be received but the one-segment broadcasting can be received. Receiver device.   The control unit controls the reception system to automatically switch to reception of the full segment broadcasting when the reception of the full segment broadcasting becomes possible after switching to the reception of the one segment broadcasting according to the notification. The digital broadcast receiving apparatus according to claim 2, wherein: A plurality of the receiving systems are provided,
A part of the plurality of receiving systems searches for each broadcasting station whether or not full-seg broadcasting and one-seg broadcasting can be received,
The control unit confirms a reception state based on a search result of the broadcast station, thereby notifying a user of a reception state of full-segment broadcasting and one-segment broadcasting for each channel of the broadcasting station. The digital broadcast receiver according to 1. The controller is
A channel list showing each reception status of full-segment broadcasting and one-segment broadcasting is displayed on the display unit for each channel of the broadcasting station.
When the full segment fixed mode is set, the channel list displays only the channels of broadcast stations capable of receiving full segment broadcasts, or the channels of broadcast stations capable of receiving full segment broadcasts and one segment. 5. The digital broadcast reception according to claim 4, wherein a channel of a broadcasting station capable of receiving only broadcasting is displayed in a different display mode, and channel selection of a broadcasting station capable of receiving only one-segment broadcasting is not accepted. apparatus.

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