JP2014143622A - Digital broadcast receiver, channel preset list and channel switching method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a "digital broadcast receiver" which can easily select (channel selection) an appropriate channel even in a region where a region that can receive broadcast radio waves from a plurality of transmitter stations is complicated.SOLUTION: A digital broadcast receiver receives programs from a plurality of broadcast stations which are broadcast by using channels determined for the plurality of broadcast stations for each transmitter station from the plurality of transmitter stations. The digital broadcast receiver includes: a storage section 24 for storing a channel preset list showing the channels determined for the plurality of broadcast stations in accordance with the individual transmitter stations; and first channel selection control means (20:S14, S16) for selecting the channel of the broadcast station after switching as a receiving channel, which is made to correspond to the transmitter station to which the channel of the broadcast station before switching is made to correspond on the basis of the channel preset list.

Description

  The present invention relates to a digital broadcast receiver such as a digital terrestrial television broadcast receiver, a channel preset list used therein, and a channel switching method in the digital broadcast receiver.

  Conventionally, a terrestrial digital television receiver described in Patent Document 1 is known. This terrestrial digital television receiver is suitable for mounting a moving body such as a vehicle, and a transmitting station table showing correspondence between each transmitting station that broadcasts a program of each broadcasting station (broadcasting company) and a broadcasting area; Each broadcast area has a channel table that indicates correspondence between channels that can be received in the broadcast area. Then, from the information about the transmitting station extracted from the received broadcast radio wave, the broadcasting area where the current mobile unit is located is determined with reference to the transmitting station table, and further, with reference to the channel table, Channels that can be received in the broadcast area are registered as a preset table (channel preset table). Thereafter, tuning is performed according to the preset table.

  According to such a digital terrestrial television apparatus, an appropriate preset table can be registered regardless of the position of the moving body. As a result, according to the preset table, an appropriate channel can be selected (channel selection), and a program from a broadcast station can be always viewed in a good state.

JP 2007-336408 A

  However, in the conventional digital terrestrial television broadcast receiver described above, the broadcast wave from the transmitting station is always received from the received broadcast wave, and the radio wave received at the current position is broadcast from which transmitting station. Must be monitored, and the burden of the processing is heavy. In addition, in areas where the areas where broadcast waves from multiple transmission stations can be received are complicated, there is a possibility that broadcast waves from multiple transmission stations may be received. It is difficult to determine the table, and as a result, it is difficult to select an appropriate channel.

  The present invention has been made in view of such circumstances, and easily selects (selects) an appropriate channel even in a complex area where broadcast radio waves from a plurality of transmitting stations can be received. It is an object of the present invention to provide a digital broadcast receiving apparatus capable of performing the above.

  The present invention also provides a channel preset list used in such a digital broadcast receiving apparatus.

  Furthermore, the present invention provides a channel switching method in such a digital broadcast receiving apparatus.

  A digital broadcast receiving apparatus according to the present invention receives programs from a plurality of broadcasting stations, which are broadcast using a channel determined for each of the plurality of broadcasting stations for each transmitting station. A digital broadcast receiving apparatus, a storage unit for storing a channel preset list representing channels determined for each of the plurality of broadcast stations corresponding to each transmitting station, and a received broadcast program as one broadcast station When switching from another program to a program of another broadcasting station, based on the channel preset list stored in the storage unit, the switching associated with the transmission station associated with the channel of the broadcasting station before switching It has the structure which has the 1st channel selection control means which selects the channel of a subsequent broadcasting station as a receiving channel.

  With such a configuration, when a received program is switched from a program of one broadcast station to a program of another broadcast station, a channel determined for each of the plurality of broadcast stations corresponding to each transmitting station is set. Based on the channel preset list to be represented, the channel of the broadcasting station after switching associated with the transmitting station associated with the channel of the broadcasting station before switching is selected as the reception channel. If the program from the broadcasting station before switching is well received, the program from the broadcasting station after switching that is broadcast from the same transmitting station is received, so the program from the broadcasting station after switching is also good. Can be received.

  In the digital broadcast receiving apparatus according to the present invention, when a received program is switched from a program of one broadcast station to a program of another broadcast station, the switching is performed based on the channel preset list stored in the storage unit. A second channel selection control means for selecting one channel as a reception channel from the plurality of channels of the broadcast station after switching, which is associated with a plurality of transmission stations associated with channels of the previous broadcast station; be able to.

  With such a configuration, when a received program is switched from a program of one broadcast station to a program of another broadcast station, a channel determined for each of the plurality of broadcast stations corresponding to each transmitting station is set. On the basis of the channel preset list to be represented, one channel is selected as a reception channel from the plurality of channels of the broadcast station after switching associated with the plurality of transmitting stations associated with the channels of the broadcast station before switching. Of the multiple transmitting stations associated with the channel of the broadcasting station before switching, the channel of the broadcasting station after switching that is associated with the same transmitting station that broadcasts the program from the broadcasting station before switching is selected. Therefore, if the program from the broadcasting station before the switching is satisfactorily received, the program from the broadcasting station after the switching can be satisfactorily received.

  In the digital broadcast receiving apparatus according to the present invention, display control means for distinguishing the relationship between currently receivable broadcast stations and channels for each transmitting station and displaying them on the display unit based on the channel preset list stored in the storage unit It can be set as the structure which has these.

  With such a configuration, usage can be known for each transmitting station so as to know the relationship between a receivable broadcast station and a channel.

  The channel preset list according to the present invention is a digital that receives programs from a plurality of broadcasting stations that are broadcast using a channel determined for each of the plurality of broadcasting stations for each transmitting station. A channel preset list stored in a storage unit of a broadcast receiving device and used when selecting a channel corresponding to a broadcast station of a program to be received, each of the plurality of broadcast stations corresponding to each transmitting station It is possible to adopt a configuration that represents a channel determined for each.

  A channel switching method according to the present invention is a digital switching method for receiving a program from a plurality of broadcasting stations that is broadcast using a channel determined for each of a plurality of broadcasting stations for each transmitting station. A channel switching method performed in a broadcast receiving apparatus, which is received using a channel preset list that represents a channel that is stored in a storage unit and determined for each of the plurality of broadcasting stations in correspondence with each transmitting station. When a program to be switched from one broadcast station program to another broadcast station program is transmitted based on the channel preset list stored in the storage unit in association with the channel of the broadcast station before switching And a first channel selection control step of selecting a channel of the broadcast station after switching associated with a station as a reception channel.

  Further, in the channel switching method according to the present invention, when switching a received program from a program of one broadcasting station to a program of another broadcasting station, based on the channel preset list stored in the storage unit, A second tuning control step of selecting one channel as a receiving channel from the plurality of channels of the broadcasting station after switching, which is associated with a plurality of transmitting stations associated with the channel of the broadcasting station before switching; can do.

  According to the digital broadcast receiving apparatus according to the present invention, when a received program is switched from a program of one broadcast station to a program of another broadcast station, it is associated with each transmitting station stored in the storage unit in advance. Based on a channel preset list representing channels determined for each of the plurality of broadcasting stations, the channel of the broadcasting station after switching associated with the transmitting station associated with the channel of the broadcasting station before switching is received. Since it is selected as a channel, it is possible to easily select (tune to) an appropriate channel even in an area where the areas where broadcast radio waves from a plurality of transmitting stations can be received are complicated.

  Further, according to the channel preset list according to the present invention, when a received program is switched from a program of one broadcasting station to a program of another broadcasting station, the transmitting station associated with the channel of the broadcasting station before switching is associated. The channel of the broadcasting station after switching associated with can be easily selected as a receiving channel.

  Further, according to the channel switching method of the present invention, when the received program is switched from the program of one broadcast station to the program of another broadcast station, it is made to correspond to each transmitting station stored in the storage unit in advance. Based on the channel preset list representing the channels determined for each of the plurality of broadcasting stations, the channel of the broadcasting station after switching that is associated with the transmitting station associated with the channel of the broadcasting station before switching is Since it is selected as a reception channel, even if the area where broadcast radio waves from a plurality of transmission stations can be received is complicated, it can be easily switched to an appropriate channel.

It is a block diagram which shows the structure of the digital broadcast receiver which concerns on embodiment of this invention. It is a figure which shows the example of the area where one channel preset list is set. It is a figure which shows an example of the channel preset list set with respect to the area shown in FIG. It is a flowchart which shows the flow of the process which concerns on the channel switching performed by the control unit of the digital broadcast receiver shown in FIG. It is a figure which shows the 1st example of the procedure of the switching of a channel on a channel preset list. It is a figure which shows the 2nd example of the procedure of switching of a channel on a channel preset list.

  An embodiment of the present invention will be described with reference to the drawings.

  A digital broadcast receiving apparatus according to an embodiment of the present invention is configured as shown in FIG. The digital broadcast receiver shown in FIG. 1 is a digital terrestrial television broadcast receiver mounted on a vehicle. This digital terrestrial television broadcast receiver is broadcasted from a plurality of transmitting stations using channels determined for each of a plurality of broadcasting stations (broadcasting companies such as NHK General and NHK Education) for each transmitting station. Receiving a program from the plurality of broadcast stations and outputting video and audio of the program.

  In FIG. 1, the terrestrial digital television broadcast receiver includes a channel selection unit 11, a demodulation unit 12, a demultiplexing unit 13, a decoding unit 14, a video processing unit 15, an audio processing unit 16, a display unit 21, and a speaker 22. Yes. The channel selection unit 11 extracts a broadcast signal of a designated channel (physical channel) from broadcast radio waves received by the antenna (channel selection). The demodulation unit 12 demodulates the broadcast signal (modulated by OFDM) from the channel selection unit 11 to generate a digital signal corresponding to the broadcast signal. The broadcast signal includes various data (EPG, information necessary for channel selection, etc.) in addition to video and audio. The demultiplexing unit 13 separates a signal (TS packet) including video and audio from other signals. The decoding unit 14 decodes a signal (TS packet) including video and audio from the demultiplexing unit 13 to generate a video signal and an audio signal in a predetermined format. The video signal obtained by decoding by the decoding unit 14 is processed by the video processing unit 15, and a video based on the video signal is displayed on the display unit 21. Also, the audio signal obtained by decoding by the decoding unit 14 is processed by the audio processing unit 16, and audio based on the audio signal is output from the speaker 22.

  The digital terrestrial television broadcast receiving apparatus further includes a control unit 20, an operation unit 23, and a storage unit 24. The control unit 20 controls the operations of the channel selection unit 11, the demodulation unit 12, the demultiplexing unit 13, and the decoding unit 14 described above. The control unit 20 controls the video processing unit 15 to generate a video signal (character, table, image, etc.) based on the image information alone, or a video signal obtained by decoding by the decoding unit 14. Can be superimposed on the video of the broadcast program based on the above and displayed on the display unit 21. The operation unit 23 includes a remote controller, switches, a touch panel provided on the display unit 21, and the like, and sends operation information to the control unit 20. The storage unit 24 stores information necessary for processing of the control unit 20 and various information obtained by the processing. The storage unit 24 stores a channel preset list representing channels determined for broadcast stations (broadcasting companies) of programs that can be received in each of a plurality of areas. The control unit 20 performs channel selection control for the channel selection unit 11 based on the channel preset list stored in the storage unit 24.

  As described above, channel preset lists set for various areas are stored in the storage unit 24. For example, one channel preset list is set for the area E (within the thick rectangular frame) as shown in FIG. This area E can receive programs broadcast from the TTT relay station (transmitting station), programs broadcast from the MMM relay station (transmitting station), and programs broadcast from the NNN relay station (transmitting station). . Further, in detail, at the point P1 in the area E, only the program broadcast from the TTT relay station can be received, and at the point P2, the program broadcast from the TTT relay station and the program broadcast from the NNN relay station In addition, only the program broadcast from the MMM relay station can be received at the point P3. Further, at the point P4 in the area E, both the program broadcast from the TTT relay station and the program broadcast from the MMM relay station can be received. At the point P5, the program broadcast from the TTT relay station, Programs from the MMM relay station and programs broadcast from the NNN relay station can be received. At the point P6, only programs broadcast from the NNN relay station can be received.

  For example, the channel preset list set for this area E is configured as shown in FIG.

  In FIG. 3, this channel preset list includes 10 (multiple) broadcasting stations (broadcasting companies: AAA stations (for example, HNK general)) corresponding to each transmitting station (TTT relay station, MMM relay station, NNN relay station). , BBB station (for example, NHK education), CCC station, DDD station, EEE station, FFF station, GGG station, HHH station, JJ station, KKK station). For example, from the TTT relay station, the AAA station program is broadcast using channel “35”, the BBB station program is broadcast using channel “47”, and so on. Corresponding to the TTT relay station, the channel “35” is associated with the AAA station, the channel “47” is associated with the BBB station, and the like, and the channel is associated with each of the 10 broadcasting stations. From the MMM relay station, the AAA station program is broadcast using channel “27”, the BBB station program is broadcast using channel “26”, and so on. Correspondingly, the channel “27” is associated with the AAA station, the channel “26” is associated with the BBB station, and so on. Also, from the NNN relay station, the AAA station program is broadcast using channel “19”, the BBB station program is broadcast using channel “26” in the same manner as the MMM relay station, and so on. In the channel preset list, channel “19” is associated with AAA station, channel “26” is associated with AAA station, channel “26” is associated with each of 10 broadcast stations, and so on. ing.

  The control unit 20 uses the channel preset list stored in the storage unit 24 to execute processing related to channel switching, for example, according to the procedure shown in FIG.

  The control unit 20 acquires position information representing the position of the vehicle detected by the GPS unit of the navigation system mounted on the vehicle, and includes the position represented by the position information, for example, set in the area E shown in FIG. The channel preset list (see FIG. 3) is read from the storage unit 24. Then, the control unit 20 switches the reception channel of terrestrial digital broadcasting using this channel preset list.

  In FIG. 4, when a channel selection operation for receiving a program of a broadcasting station (for example, NHK synthesis) is performed on the operation unit 23 (for example, the touch panel of the display unit 21), the control unit 20 performs a predetermined method. Accordingly, the channel from which the program from the broadcasting station designated by the channel selection operation is favorably received is selected, and the channel selection unit 11 is controlled based on the selected channel (S11). By the processing in each of the demodulator 12, demultiplexer 13, decoder 14, video processor 16, and audio processor 16, the video of the broadcast station program corresponding to the selected (selected) channel is displayed. 21 and the sound of the program is output from the speaker 22.

  Thereafter, the control unit 20 repeatedly determines whether or not the reception channel is switched based on the channel selection operation performed again by the operation unit 23 (S12). In the process, when the channel selection operation for switching from the currently received broadcast station program to the different broadcast station program is performed in the operation unit 23 (YES in S12), the control unit 20 is shown in FIG. Based on the channel preset list, the channel of the broadcasting station after switching associated with the transmitting station associated with the channel of the broadcasting station before switching is acquired (S13).

  For example, when switching from the AAA station program to the DDD station program, as shown by the dashed arrow a in FIG. 5, if the AAA station channel before switching is “35”, the TTT corresponding to the channel “35” The channel “42” of the DDD station after switching associated with the relay station is acquired (for example, switching at the point P1 in FIG. 2). Similarly, when switching from the AAA station program to the DDD station program, as shown by the dashed arrow b in FIG. 5, if the AAA station channel before switching is “27”, it corresponds to the channel “27”. The channel “22” of the DDD station after switching associated with the MMM relay station is acquired (for example, switching at point P3 in FIG. 2).

  Further, for example, when switching from a program at the GGG station to a program at the BBB station, if the channel of the GGG station before switching is “23” as shown by the broken line arrows c and d in FIG. The channel “26” of the switched BBB station associated with the MMM relay station corresponding to “23”, and the MMM relay station of the switched BBB station associated with the NNN relay station corresponding to the channel “23”; The same channel “26” is acquired (for example, switching at point P5 in FIG. 2).

  Further, for example, when switching from an FFF station program to an AAA station program, if the channel of the FFF station before switching is “24”, as shown by the broken line arrow e in FIG. Corresponding to the channel “27” (for example, switching at the point P3 in FIG. 2) of the AAA station after switching associated with the MMM relay station and the channel “24” as shown by the broken line arrow f in FIG. The channel “19” of the AAA station after switching associated with the NNN relay station (for example, switching at point P6 in FIG. 2) is acquired.

  As described above, when the control unit 20 acquires the channel of the post-switching broadcast station associated with the transmitting station associated with the channel of the pre-switching broadcast station based on the channel preset list shown in FIG. (S13), it is determined whether a plurality of channels have been acquired (S14). When a single channel is acquired instead of a plurality of channels (YES in S14), for example, as shown in FIG. 5 (see dashed arrows a and b), an AAA station (channel “35” or “27”) When the channel “42” or “22” of the DDD station switched from is acquired (see broken line arrows a and b in FIG. 5), the control unit 20 changes the acquired channel “42” or “22”. The reception channel after switching is selected (S16) (S14 → S16: first tuning control means, first tuning control step).

  On the other hand, when the control unit 20 acquires a plurality of channels (YES in S14), the control unit 20 determines whether or not the plurality of channels are the same (S15). When the acquired plurality of channels are the same (YES in S15), for example, as shown in FIG. 5 (see broken line arrows c and d), the MMM relay station switched from the GGG station (channel “23”) When the channel “26” of the BBB station to be associated and the channel “26” of the BBB station to be associated with the NNN relay station switched from the GGG station (channel “23”) are acquired, the control unit 20 selects the acquired same channel “26” as the received channel after switching (S16) (S14 → S15 → S16: first tuning control means, first tuning control step).

  If the plurality of channels described above are not the same (NO in S15), for example, as shown in FIG. 6 (see broken line arrows e and f), the channel is associated with the MMM relay station switched from the FFF station (channel “24”). When the AAA station channel “27” and the AAA station channel “19” associated with the NNN relay station switched from the FFF station (channel “24”) are acquired, the control unit 20 One of the plurality of channels “27” and “19” is selected as a reception channel (S17), and it is determined whether or not the reception quality in the selected reception channel is good (S18). If the reception quality in the selected reception channel does not reach the predetermined quality (NO in S18), another channel is selected as the reception channel from the plurality of channels (S17: see broken line arrow g in FIG. 6), It is determined whether or not the reception quality on the selected reception channel is good (S18). By repeating such processing (S17, S18), a channel having good reception quality is selected as the final reception channel from the plurality of channels (YES in S17, S18) (NO in S14 → S15 → S17 → YES in S18: second tuning control means, second tuning control step).

  When the control unit 20 selects the channel of the broadcasting station after switching as a new reception channel as described above, the control unit 20 controls the channel selection unit 11 based on the selected channel (S11). Then, the broadcast station after switching corresponding to the newly selected (tuned) channel by processing in each of the demodulator 12, demultiplexer 13, decoder 14, video processor 16 and audio processor 16 Are displayed on the display unit 21 and the sound of the program is output from the speaker 22.

  In the digital terrestrial television broadcast receiving apparatus as described above, when a received program is switched from a program of one broadcasting station to a program of another broadcasting station, each transmitting station (TTT relay station, MMM relay station, NNN relay station) ) In accordance with a channel preset list (see FIG. 3) representing channels determined for each of a plurality (10) of the broadcasting stations, the transmitting station associated with the channel of the broadcasting station before switching. The channel of the broadcasting station after switching associated with is selected as a receiving channel (see broken arrows a, b, c, and d in FIG. 5). For this reason, if the program from the broadcasting station before switching is well received, the program from the broadcasting station after switching broadcast from the same transmitting station is received. The program can be received well. In this way, by using the channel preset list (see FIG. 3) indicating the channels determined for each of the plurality of broadcasting stations corresponding to each transmitting station, the channel (reception channel) of the broadcasting station after switching is used. ) Is selected, so even if the area in which broadcast radio waves from a plurality of transmitting stations can be received is complicated (for example, see FIG. 2), an appropriate channel can be easily selected (channel selection). )can do.

  Further, when the received program is switched from the program of one broadcasting station to the program of another broadcasting station, the channel of the broadcasting station before switching is associated with the channel preset list (see FIG. 3). When a plurality of channels of a broadcasting station after switching associated with a plurality of transmitting stations are acquired (for example, see broken arrows e and f in FIG. 6), the transmitting station after switching associated with the plurality of transmitting stations. One of the plurality of channels is selected as one receiving channel. If the transmitting station corresponding to the channel selected as the receiving channel is the same as the transmitting station to which the channel of the broadcasting station before switching is associated, the same as the program from the broadcasting station before switching, after the switching Programs from other broadcast stations can be received satisfactorily. If the transmitting station corresponding to the channel selected as the receiving channel is not the same as the transmitting station associated with the channel of the broadcasting station before switching, and the program from the broadcasting station after switching cannot be received well. Even so, it is only necessary to search for a channel with good reception within a limited range (a range of a plurality of acquired channels), and the processing is not greatly burdened.

  In the above-described digital terrestrial television broadcast receiving apparatus, the control unit 20 (display control means) controls the video processing unit 15 in accordance with the operation on the operation unit 23 and stores the channel preset list (stored in the storage unit 24). Based on FIG. 3, the relationship between the currently receivable broadcast stations and channels can be distinguished for each transmitting station and displayed on the display unit 21 in a predetermined format. In this case, the entire channel preset list can be displayed, or for example, a list of channels can be individually displayed for each transmitting station (TTT relay station, MMM relay station, NNN relay station). Thereby, the user can know the relationship between the receivable broadcast station and the channel from the information based on the channel preset list displayed on the display unit 21 by distinguishing it for each transmitting station.

  The format of the channel preset list is not limited to that shown in FIG. 3, and any channel preset list may be used as long as it represents a channel determined for each of the plurality of broadcasting stations corresponding to each transmitting station.

  Although a terrestrial digital television broadcast receiver has been described as an example of a digital broadcast receiver, the present invention is not limited to this, and other types of digital broadcast receivers may be used.

  The digital receiver according to the present invention has an effect that an appropriate channel can be easily selected (channel selection) even in an area where the areas where broadcast waves from a plurality of transmitting stations can be received are complicated. And is useful as a digital broadcast receiver such as a terrestrial digital television broadcast receiver.

DESCRIPTION OF SYMBOLS 11 Channel selection part 12 Demodulation part 13 Demultiplexing part 14 Decoding part 15 Video | video processing part 16 Audio | voice processing part 20 Control unit 21 Display part 22 Speaker 23 Operation part 24 Storage part

Claims (6)

A digital broadcast receiving apparatus that receives programs from a plurality of broadcasting stations that are broadcast using a channel determined for each of a plurality of broadcasting stations for each transmitting station from a plurality of transmitting stations,
A storage unit for storing a channel preset list representing channels determined for each of the plurality of broadcasting stations in correspondence with each transmitting station;
When switching a received program from a program of one broadcast station to a program of another broadcast station, the channel of the broadcast station before the switching is associated based on the channel preset list stored in the storage unit. And a first channel selection control means for selecting, as a reception channel, the channel of the broadcast station after switching associated with the transmitting station.   When switching a received program from a program of one broadcast station to a program of another broadcast station, the channel of the broadcast station before the switching is associated based on the channel preset list stored in the storage unit. 2. The digital broadcast receiving apparatus according to claim 1, further comprising second channel selection control means for selecting one channel as a reception channel from the plurality of channels of the broadcast station after switching associated with a plurality of transmission stations.   The digital control device according to claim 1 or 2, further comprising display control means for distinguishing the relationship between a currently receivable broadcasting station and a channel for each transmitting station based on a channel preset list stored in the storage unit and displaying the relationship on a display unit. Broadcast receiving device. Stored in a storage unit of a digital broadcast receiving apparatus that receives programs from the plurality of broadcasting stations broadcast from a plurality of transmitting stations using channels determined for each of the plurality of broadcasting stations for each transmitting station. A channel preset list used when selecting a channel corresponding to a broadcast station of a program to be received,
A channel preset list representing channels determined for each of the plurality of broadcasting stations corresponding to each transmitting station. A channel switching method performed by a digital broadcast receiving apparatus that receives programs from a plurality of broadcasting stations that are broadcast from a plurality of transmitting stations using a channel determined for each of the plurality of broadcasting stations for each transmitting station. Because
Stored in the storage unit, using a channel preset list representing channels determined for each of the plurality of broadcast stations corresponding to each transmitting station,
When switching a received program from a program of one broadcast station to a program of another broadcast station, the channel of the broadcast station before the switching is associated based on the channel preset list stored in the storage unit. A channel switching method comprising a first channel selection control step of selecting a channel of the broadcasting station after switching associated with a transmitting station as a receiving channel.   When switching a received program from a program of one broadcast station to a program of another broadcast station, the channel of the broadcast station before the switching is associated based on the channel preset list stored in the storage unit. 6. The channel switching method according to claim 5, further comprising a second channel selection control step of selecting one channel as a reception channel from the plurality of channels of the broadcasting station after switching associated with a plurality of transmitting stations.

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