JP2011193328A - Mobile digital broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the following problems:it takes a long time to update preset channels and a user cannot view a program when all channels for all the broadcasting stations are scanned after determining that the preset channel can be received or not. <P>SOLUTION: A mobile digital broadcast receiver includes: a tuning section for tuning to a broadcasting station of digital broadcast; a demodulating section for demodulating a digital broadcast signal; a decoding section 103 for decoding the demodulated digital broadcast signal and outputting information on whether the channel of the station can be received or not; a control section 105 for controlling the tuning section; a first storing section for storing preset information; and a second storing section for storing preset information of affiliated stations. When determining that a broadcasting station being tuned cannot be received, based on the information on whether the channel of the station can be received or not, the control section uses the preset information stored in the first storing section to search for an affiliated station and causes the tuning section to tune to the affiliated station, and causes the second storing section to store information on affiliated stations of another broadcasting station obtained in retrieving information of the affiliated station. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a mobile terrestrial digital broadcast receiver equipped with a preset function of a receivable broadcast station.

  A conventional mobile digital broadcast receiver presets broadcast stations that can be received in a predetermined channel in advance by a channel scan operation. If the broadcast area changes while moving, it will not be possible to receive broadcasts on preset channels. There is a technology for updating a group of channels. There is also a technique for determining whether or not a predetermined number of channels or more cannot be received as a means for determining whether or not the broadcast area has changed, and updating a preset channel group by performing a scanning operation (for example, Patent Documents). 1).

Japanese Patent Laid-Open No. 2002-176591

  However, in the configuration of the above-described conventional mobile digital broadcast receiver, when determining whether or not the preset channel can be received, all or a predetermined number of channels or more that a broadcasting station can exist are scanned, and the scanning result As a result, the preset channel group is updated, so that the time required for the update becomes longer, and the program cannot be viewed during that time.

  In view of the above problems, the present invention continues viewing by a mechanism for searching for a relay station or affiliated station when a broadcast being viewed becomes unviewable, and views according to information acquired at the time of the search. It is an object of the present invention to provide a mobile digital broadcast receiver capable of updating preset channel information other than channels.

  In order to solve the above-described conventional problems, a mobile digital broadcast receiver according to the present invention includes a channel selection unit that selects a digital broadcast signal, a storage unit that stores channel information of the received digital broadcast signal, and a currently viewing channel. A control unit that determines whether or not the digital broadcast can be received and searches for affiliated stations. When the control unit searches for a relay station or affiliated station of the digital broadcast being viewed, the searched channel is received, and preset channels other than viewing and viewing are received based on the information acquired at the time of the search. Update information.

  Further, by storing the preset information acquired by the search in an area different from the area for storing the current preset information, when the user switches to the predetermined channel by the channel selection operation, the predetermined channel that is currently preset is changed. When it is detected that reception is impossible, the channel information stored in another area is switched.

  As described above, the time required for updating the preset can be shortened and the time during which viewing cannot be performed can be shortened.

  According to the mobile digital broadcast receiver of the present invention, when the currently viewed broadcast cannot be received, the relay station or affiliated station that can be viewed is searched and continuously viewed, and at the same time, preset information of other channels is obtained. Since addition / update is performed, it is possible to update the preset information by moving the area while reducing the time during which viewing is not possible.

1 is a block diagram showing a configuration of a mobile digital broadcast receiver according to Embodiment 1 of the present invention. The figure which shows the memory | storage state of the memory | storage part A and the memory | storage part B in Embodiment 1 of this invention Block diagram showing a configuration of a mobile digital broadcast receiver according to Embodiment 2 of the present invention

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(Embodiment 1)
FIG. 1 shows the configuration of a mobile digital broadcast receiver according to Embodiment 1 of the present invention. A mobile digital broadcast receiver according to Embodiment 1 of the present invention includes a channel selection unit 101 that selects a digital broadcast station, a demodulation unit 102 that demodulates a signal selected by the channel selection unit 101, and a demodulated signal. Based on the information from the decoding unit 103, the storage unit A106 for storing the information (reception availability information) and the preset information acquired by the decoding unit 103 via the control unit 105, and the information from the UI unit 104 The control unit 105 executes the channel selection process by controlling 101, and the storage unit B 107 stores the information acquired by the channel selection process via the control unit 105.

  Hereinafter, preset information update processing in the present embodiment will be described. The preset information update process is executed by the control unit 105.

  When the control unit 105 obtains information about whether or not reception is possible based on the reception level or reception error information of the radio wave from the decoding unit 103 for the program of the channel (broadcasting station) currently being viewed, The channel selection unit 101 is controlled to search for a receivable broadcast station of the same or the same series as the currently watched broadcast station using the preset information in the storage unit A106 and switch to the broadcast station obtained by the search. Then, when searching for the same broadcast station or the same affiliated station, information on other broadcast stations acquired by channel selection of the channel selection unit 101 is stored in the storage unit B107 as shown in FIG. Note that the control unit 105 determines whether or not reception is possible based on position information acquired from a position information acquisition unit (not shown) such as a GPS, in addition to reception determination based on reception information acquired from the decoding unit 103. You may go.

  FIG. 2 is a diagram illustrating the relationship between the preset information stored in the storage unit A106 and the affiliated station information stored in the storage unit B107. In FIG. 2, when “Broadcasting station A” stored in preset “1” is selected as the currently viewed broadcasting station, control unit 105 determines that “Broadcasting station A” cannot be received. Then, the affiliated station “affiliated station A” is searched and selected by the channel selection unit 101, and from the preset “2” to the preset station “12”, “broadcast station B” to “broadcast station L” are stored. The corresponding affiliated station information is acquired, and the affiliated station information stored in the storage unit B107 is updated (changed).

  With the above processing, when the user switches from the broadcasting station currently being viewed through the UI unit 104 to another broadcasting station, the control unit 105 selects a broadcasting station preset in the storage unit A106. When the broadcast station that has been stationed cannot be received, the channel selection unit 101 is switched from the broadcast station (affiliation station) information stored in the storage unit B107 to the same broadcast station or the same affiliate station as the information selected by the user. Is possible. When the same channel is selected after the next time, it is possible to shorten the time during which the user cannot view by selecting the broadcast station information stored in the storage unit B107.

  In the present embodiment, information on broadcast stations across the country may be stored in advance in the storage unit B107 for each region. In this way, when the control unit 105 obtains information indicating whether or not reception is possible from the decoding unit 103 and determines that reception is not possible, the broadcast that can be received by the same broadcast station or the same affiliated station as the currently viewed broadcast station A process of searching for a station and switching to a broadcasting station obtained by searching the channel selection unit 101 can be performed at higher speed. Also, when the broadcasting area changes due to movement by searching for the broadcasting station group in the same area from the information of the selected broadcasting station from the storage unit B107 and updating the preset information in the storage unit A106, the preset information is also updated. It can be done smoothly.

(Embodiment 2)
FIG. 3 shows the configuration of a mobile digital broadcast receiver according to Embodiment 2 of the present invention. The mobile digital broadcast receiver according to the present embodiment is different from the mobile digital broadcast receiver according to the first embodiment in that a channel selection unit 108, a demodulation unit 109, and a decoding unit 110 are newly provided. To do. Components having the same reference numerals as those in FIG.

  In this embodiment, while watching the program being viewed by the channel selection unit 101, the demodulation unit 102, and the decoding unit 103, the other channel selection unit 108, the demodulation unit 109, and the decoding unit 110 are searched for broadcast stations that can be received. By storing the information acquired as a result of the search in the storage unit B107, when the user switches from the broadcasting station currently being viewed through the UI unit 104 to another broadcasting station, the control unit 105 selects one of the broadcasting stations. The station 101, the demodulation unit 102, and the composite unit 103 select a broadcast station preset in the storage unit A106, and the other channel selection unit 108, the demodulation unit 109, and the composite unit 110 select the same broadcast station. Move by switching the channel selection unit from the broadcast station information stored in the storage unit B acquired when the affiliated station is searched to the same broadcast or the same affiliated station as the information selected by the user It is possible that the user is to shorten the time that can not be watched.

According to the present invention, when a broadcast currently being viewed becomes unreceivable, a searchable relay station or affiliated station is searched for, and at the same time, the preset information of other channels is added / updated. It is possible to update the preset information by moving the area in a state where the time that cannot be performed is shortened, and it is useful as a digital broadcast receiver mounted on a portable terminal, a vehicle, an aircraft, or the like.

101, 108 Channel selection unit 102, 109 Demodulation unit 103, 110 Decoding unit 104 UI unit 105 Control unit 106 Storage unit A
107 Storage unit B

Claims (4)

A first channel selection section for selecting a digital broadcasting station;
A demodulator that demodulates the digital broadcast signal of the selected broadcast station;
A decoding unit that decodes the demodulated digital broadcast signal and outputs information indicating whether reception is possible;
A control unit that controls the first channel selection unit based on the information indicating whether or not reception is possible;
A first storage unit for storing preset information;
A second storage unit that stores preset information of affiliated stations,
The control unit uses the preset information stored in the first storage unit when the first channel selection unit determines that the broadcasting station being selected is incapable of reception based on the reception availability information. The affiliated station information of other broadcasting stations obtained when the affiliated station is searched, the searched station is selected by the first channel selection unit, and the affiliated station information is retrieved. A mobile digital broadcast receiver characterized in that the mobile digital broadcast receiver is stored in the second storage unit. A second channel selection unit for selecting a digital broadcast station;
The control unit uses the preset information stored in the first storage unit when the first channel selection unit determines that the broadcast station being selected is incapable of reception based on the reception availability information. In the preset information stored in the first storage unit, the selected station is selected by the first channel selection unit, and the second channel selection unit stores the selected station in the preset information stored in the first storage unit. Searching for an affiliated station of a broadcasting station other than the broadcasting station in the station, and storing the searched affiliated station information of a broadcasting station other than the selected broadcasting station in the second storage unit, The mobile digital broadcast receiver according to claim 1. The control unit uses the preset information of the affiliated station stored in the second storage unit to select a broadcast station other than the currently selected broadcast station. The mobile digital broadcast receiver according to claim 1, wherein the mobile digital broadcast receiver is a station. The second storage unit further stores preset information of affiliated stations in a plurality of regions,
A position information acquisition unit that acquires position information;
The control unit uses the preset information stored in the first storage unit when the first channel selection unit determines that the broadcasting station being selected is incapable of reception based on the reception availability information. The affiliated station is searched, the retrieved affiliated station is selected by the first channel selection unit, and the second storage unit responds according to the location information acquired by the location information acquisition unit. 2. The mobile digital broadcast reception according to claim 1, wherein preset information of an affiliated station to be acquired is acquired, and preset information in the first storage unit is updated based on the acquired preset information of the affiliated station. Machine.

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