JP5545657B2 - Digital broadcast receiver - Google Patents

Description

  The present invention relates to a digital broadcast receiving apparatus, and more particularly to a digital broadcast receiving apparatus suitable for reproducing broadcast contents of a broadcast station selected by operating a preset button.

  Conventionally, in a digital broadcast receiving apparatus mounted on a moving body such as a vehicle, a receivable broadcasting station in an area where the moving body is located is transmitted from a plurality of physical channels (for example, 13 to 62 ch in terrestrial digital broadcasting). A preset is performed in which the detected receivable broadcasting station is registered in association with a preset button after being found by channel scanning. This preset is normally performed at the initial setting when the digital broadcast receiving apparatus is used for the first time.

  Specifically, in the preset, the identification information of the physical channel assigned to the broadcasting station (for example, the channel number and frequency) and the identification information of the broadcasting station (for example, the name of the broadcasting station) are used as the identification information of the preset button. The preset information is recorded in the storage unit of the digital broadcast receiving apparatus in association with (for example, a preset button number).

  Then, by operating a preset button in which such a preset is performed, a broadcast station preset (registered) in association with the preset button is immediately selected, and the broadcast contents of the broadcast station can be quickly viewed. It was possible to do.

  By the way, this type of digital broadcast receiving apparatus has a configuration mounted on a mobile body, so that a broadcast station (hereinafter referred to as a viewing station) corresponding to the broadcast content currently being viewed (reproduced) as the mobile body moves. It is not uncommon for the broadcast content of the viewing station not to be received (viewed).

  FIG. 5 shows channel assignment fields corresponding to areas A and B different from each other as an example of such a case. As shown in FIG. 5, the channel assignment field for area A shows a predetermined physical of a plurality of physical channels when a mobile body (such as a vehicle) equipped with a digital broadcast receiving device is located in area A. Each of the broadcast stations that can be received in the area A to which the channel is assigned is preset in association with a preset button having a predetermined number. Specifically, the column is divided into squares corresponding to the corresponding physical channels. The squares to which the broadcasting stations are preset are assigned the number of the corresponding preset button, and the broadcasting station Different patterns are hatched. More specifically, in FIG. 5, among the 13 to 62 ch of terrestrial digital broadcasting, each broadcasting station to which physical channels 13, 14, 16, 18, 20, and 22 ch are assigned in area A is shown. The preset buttons (numbers 1, 2, 4 to 6 and 8) corresponding to the numbers are preset.

  From this state, when the moving object leaves area A and enters area B, as shown in the channel assignment column for area B in FIG. The station is different from the area A. Here, among the squares that are hatched in the channel assignment column of area B, the physical channels that are different from the squares that are hatched in the same pattern in the channel assignment column of area A are as follows: A broadcasting station, that is, an affiliated station, of the same series as the broadcasting station on the area A side corresponding to the squares that are hatched in the same pattern. On the other hand, among the squares that are hatched in the channel assignment column of area B, the same physical channel as that of the squares that are hatched in the same pattern in the channel assignment column of area A is as follows: The same station as the broadcast station on the area A side corresponding to the squares that are hatched in the same pattern is shown. For example, in area B, 24 channels are allocated to affiliated stations of the broadcasting stations to which 18 channels are allocated in area A. That is, the same broadcast content that is broadcast in 18 channels in area A is broadcast in 24 channels in area B. On the other hand, the same broadcast content that is being broadcast on channel 13 in area A will continue to be broadcast on the same channel and broadcast station in area B.

  In such an example, for example, the user operates the preset button No. 4 in the area A, and views a broadcast program using a preset broadcast station to which 18ch corresponding thereto is assigned as a viewing station. When entering the area B as the moving object moves from the state, the preset information associated with the No. 4 preset button is not accompanied by an entity. That is, in the area B, the viewing station in the area A is outside the broadcasting area, so that the broadcast program having the same content as the viewing station in the area A can be viewed with the preset button 4 selected. I can't continue. In the example of FIG. 5, in the area A, only the broadcast program having the same content as the broadcast program of the broadcast station to which the preset 13ch is assigned in association with the second preset button is assigned in the area B. You can watch with the preset button.

  Therefore, conventionally, in order to cope with the problem caused by the movement of the mobile body outside the broadcasting area, in the digital broadcast receiving apparatus, when the viewing station cannot be received due to the movement of the mobile body, By searching for a receivable affiliated station corresponding to the viewing station, the same broadcast content as that currently being viewed can be continuously viewed.

  In the example of FIG. 5, the receivable affiliated stations are searched in order of channel number (ascending order) starting from 18ch assigned to the viewing station in area A, and the affiliated stations (24ch in area B are The search ends when the assigned station is found. If the affiliated station is found, the affiliated station is replaced with the viewing station and preset (updated) in association with the preset button having the same number as the viewing station.

  FIG. 6 shows the channel assignment field in area B after the affiliated station search and affiliated station preset have been completed. As shown in FIG. 6, in area B, a broadcast station to which channel 13 is assigned as the same channel and the same channel is assigned to area A, and 24 channels newly preset by affiliated station search are assigned. You will be able to continue to watch existing broadcast stations using the preset buttons with the same number.

  As a conventional technique related to a digital broadcast receiving apparatus that searches for such affiliated stations, techniques shown in, for example, Patent Document 1 and Patent Document 2 have been proposed.

JP 2008-148197 A JP 2008-263504 A

  By the way, as described above, when the viewing station is out of the broadcast area (unreceivable), there is a high possibility that preset broadcast stations other than the viewing station are also out of the broadcast area.

  However, in the conventional digital broadcast receiving apparatus, only the affiliated station of the viewing station is a search target when the viewing station becomes unreceivable, and the user applies to other preset stations other than the viewing station. When the channel is switched to the other station by operating the preset button, it is confirmed that the other station cannot be received, and the affiliate station is instructed to search for the affiliate station of the other station. I was supposed to do a search.

  As a result, for preset broadcast stations other than the viewing station, there has been a problem that the affiliated stations cannot be quickly selected outside the broadcast area.

  Therefore, the present invention has been made in view of such problems, and it is possible to quickly select affiliated stations outside the broadcasting area for preset broadcasting stations other than the broadcasting station that is reproducing the broadcast content. An object of the present invention is to provide a digital broadcast receiving apparatus capable of performing the above.

  In order to achieve the above-described object, a digital broadcast receiving apparatus according to the present invention includes a plurality of preset buttons mounted on a mobile body and capable of selective operation, and corresponding physical channels in a plurality of predetermined physical channels. The preset means for registering the receivable broadcast station to which the broadcast station is assigned in association with the preset button, and the broadcast station registered by the preset means for the operation of the preset button associated with the broadcast station. Corresponding to the channel selection means for selecting the channel, the reproduction means for reproducing the broadcast contents of the broadcast station received from the broadcast station selected by the channel selection means, and the broadcast contents being reproduced by the reproduction means When the first broadcast station becomes unreceivable, the second of the plurality of physical channels that can be received in the same series as the first broadcast station. The broadcast station is searched in order of channel number starting from the first physical channel assigned to the first broadcast station during reproduction of the broadcast contents of the first broadcast station, and the second broadcast station is found. If the second affiliated station is found by the first affiliated station search means that terminates the search at that time, and the first affiliated station search means, the preset means The second broadcast station is associated with the first preset button that has been registered in association with the first broadcast station during reproduction of the broadcast contents of the first broadcast station in the plurality of preset buttons. A digital broadcast receiving device comprising preset control means for performing control for registration, wherein the first preset button in the plurality of preset buttons during reproduction of the broadcast content of the first broadcast station. When there is at least one third broadcasting station registered in association with a preset button other than the reset button, during the search period of the second broadcasting station, the same series as the third broadcasting station. A second broadcast station that can be received is searched in the order of the channel numbers in parallel with the search of the second broadcast station, using the same physical channel as the search destination of the second broadcast station as the search destination. Affiliate station search means, and when the fourth broadcast station is found by the second affiliate station search means, the preset control means Is controlled in association with a preset button other than the first preset button registered in association with the third broadcasting station.

  According to such a configuration, when the first broadcasting station that is reproducing the broadcast content becomes unreceivable, not only the second broadcasting station that is an affiliated station of the first broadcasting station, The fourth broadcast station that is an affiliated station of the preset third broadcast station other than the first broadcast station is also searched for and newly associated with the preset button associated with the third broadcast station. Since presetting can be performed, it is possible to quickly select affiliated stations outside the broadcasting area even for preset broadcasting stations other than the broadcasting station that is reproducing the broadcast content.

  Further, the second affiliated station search means may not complete the search of the fourth broadcast station with all of the plurality of physical channels as search destinations during the search period of the second broadcast station. In a predetermined period from a predetermined switching point of the broadcast content after the start of reproduction of the broadcast content of the second broadcast station, the fourth broadcast station is connected to the fourth physical channel in the plurality of physical channels. A search is made with a remaining physical channel that has not been searched for a broadcasting station as a search destination, and a channel starts with a third physical channel corresponding to the channel number next to the second physical channel assigned to the second broadcasting station as a starting point. It may be possible to search again in numerical order.

  According to such a configuration, even after the search period of the second broadcast station, the fourth broadcast with the remaining physical channel that has not been searched for the fourth broadcast station in this period as the search destination. Since a new opportunity for searching for a station can be provided in a period in which the broadcast content of the second broadcast station has little influence on the broadcast time, the reproduction quality of the broadcast content of the second broadcast station is maintained. The possibility of finding the fourth broadcasting station can be increased.

  Further, the second affiliated station search means is configured to search for all of the remaining physical channels during the first predetermined period after the start of reproduction of the broadcast content of the second broadcasting station. If the search for the broadcast station is not completed, the new predetermined value after the first predetermined period until the search for the fourth broadcast station with all the remaining physical channels as search destinations is completed. At each time period, the fourth broadcasting station is set as the search destination for the remaining physical channels that have not been searched for the fourth broadcasting station in the remaining physical channels, and the fourth broadcasting station during the previous predetermined period. The search is repeated again in the order of the channel numbers starting from the fifth physical channel corresponding to the channel number next to the fourth physical channel that is the last search destination in the search for the four broadcast stations. Succoth may be that there is possible.

  According to such a configuration, the fourth broadcast station of which search destinations are all of the remaining physical channels that have not been searched for the fourth broadcast station during the search period of the second broadcast station. Since the search can be intermittently repeated over a plurality of periods with little influence on the broadcast time of the broadcast content of the second broadcast station, the search quality can be maintained while maintaining the reproduction quality of the broadcast content of the second broadcast station. The possibility of finding four broadcast stations can be further increased.

  Furthermore, the switching time point includes a switching time point from the broadcast program of the second broadcasting station to the CM, and the predetermined period corresponding to the switching time point to the CM may be a broadcasting period of the CM. Good.

  According to such a configuration, a new opportunity to search for the fourth broadcast station after the search period of the second broadcast station is provided in a period that does not conflict with the broadcast time of the broadcast program of the second broadcast station. Therefore, the reproduction quality of the broadcast program of the second broadcast station can be reliably maintained.

  According to the present invention, even for preset broadcast stations other than the broadcast station that is reproducing the broadcast content, it is possible to quickly select affiliate stations outside the broadcast area.

The block diagram which shows embodiment of the digital broadcast receiver concerning this invention The schematic diagram which shows a preset button in embodiment of the digital broadcast receiver which concerns on this invention The conceptual diagram which shows preset information in embodiment of the digital broadcast receiver which concerns on this invention Process drawing which shows embodiment of the digital broadcast receiver concerning this invention Conceptual diagram showing channel assignment status according to area Conceptual diagram showing the results of a conventional affiliated station search

  Embodiments of a digital broadcast receiving apparatus according to the present invention will be described below with reference to FIGS.

  The digital broadcast receiving apparatus in this embodiment is mounted on a moving body such as a vehicle. In addition, when mounting a digital broadcast receiver in a vehicle, you may comprise integrally with vehicle equipment, such as a navigation apparatus.

  As shown in FIG. 1, the digital broadcast receiving apparatus 1 according to the present embodiment has a tuner 3 as a channel selection means to which an antenna 2 is connected. This tuner 3 is received via the antenna 2. A signal corresponding to the frequency of the selected broadcasting station is extracted from the radio wave of terrestrial digital broadcasting and output to the subsequent stage. Note that broadcasting station tuning is performed in various cases, such as when performing channel scanning for presets, which will be described later, operating a preset button, and searching for affiliated stations.

  Further, as shown in FIG. 1, a demodulator 4 is connected to the subsequent stage of the tuner 3, and a signal output from the tuner 3 is input to the demodulator 4. Then, the demodulator 4 obtains a transport stream by OFDM demodulating the input signal, and outputs the obtained transport stream to the subsequent stage.

  Further, as shown in FIG. 1, an error correction unit 5 is connected to the subsequent stage of the demodulation unit 4, and the transport stream output from the demodulation unit 4 is input to the error correction unit 5. It has become. Then, the error correction unit 5 outputs the input transport stream to the subsequent stage after performing known error correction as necessary.

  Furthermore, as shown in FIG. 1, a demultiplexer unit 6 is connected to the subsequent stage of the error correction unit 5, and the transport stream output from the error correction unit 5 is input to the demultiplexer unit 6. It has come to be. Then, the demultiplexer unit 6 acquires the program related information together with the video stream and the audio stream by demultiplexing the input transport stream. The program related information may be PSI (Program Specific Information) / SI (Service Information).

  As shown in FIG. 1, a video decoder 7 and an audio decoder 8 are connected to the subsequent stage of the demultiplexer unit 6, and a video stream output from the demultiplexer unit 6 is connected to the video decoder 7 as an audio signal. The audio stream output from the demultiplexer unit 6 is input to the decoder 8. The video decoder 7 decodes the input video stream to generate a video signal, and outputs the video signal to the display 10 via the image synthesis unit 9. The audio decoder 8 decodes the input audio stream to generate an audio signal, and outputs the audio signal to the speaker 11. In this way, the broadcast content (program or CM) of the selected broadcast station is played back (display / audio output). The components 4 to 11 after the demodulator 4 constitute a reproducing unit.

  Further, as shown in FIG. 1, the digital broadcast receiving apparatus 1 has an operation screen drawing unit 12, and the operation screen drawing unit 12 performs operations for performing various operations related to viewing of the terrestrial digital broadcast. The screen is displayed on the display 10 via the image composition unit 9. Some operation screens are displayed in a state of being combined with broadcast video during reproduction of the broadcast content.

  One of such operation screens is a screen 13 on which preset buttons PB having numbers (1 to 12) as shown in FIG. 2 are arranged. The broadcast video I is also displayed on the screen 13 in FIG. Each preset button PB can be selectively operated by an operating means (not shown) such as a touch panel or a remote controller.

  Furthermore, as shown in FIG. 1, the digital broadcast receiving apparatus 1 has a channel selection control unit 14, and this channel selection control unit 14 controls various channel selections for the tuner 3. It has become. As one of them, the channel selection control unit 14 performs channel selection control for channel scanning to find a broadcast station that can be received in the area where the mobile unit is located. According to this tuning control, the tuner 3 sequentially selects (scans) a plurality of physical channels (13 to 62ch) in ascending order of channel numbers, and a broadcasting station assigned to each physical channel is found. In this case, this is extracted each time. Then, for example, the channel selection control unit 14 acquires the reception field strength of the extracted broadcast station from the tuner 3, and based on the acquired reception field strength, whether or not the extracted broadcast station is receivable. By sequentially determining whether or not, a receivable broadcasting station is found. At this time, the channel selection control unit 14 can acquire specific information of receivable broadcasting stations from the demultiplexer unit 6 as program related information. Other modes of channel selection control will be described later.

  As shown in FIG. 1, the digital broadcast receiving apparatus 1 has a preset unit 15 as preset means. The preset unit 15 performs a preset for registering a receivable broadcasting station found by channel scanning in association with the preset button PB. For example, as shown in FIG. 3, the preset includes preset information in which a preset button PB number, a physical channel (may be a frequency) assigned to a broadcasting station, and a broadcasting station name are associated with each other in FIG. The preset information storage unit 16 shown in FIG. The broadcast station name and physical channel may be extracted from the program related information acquired by the channel selection control unit 14. In addition, it is sufficient to determine which number of preset buttons the broadcast station is associated with and preset based on information specifying the number of the preset button included in the program-related information or user operation.

  The channel scan as described above and the preset based on the result may be performed according to the screen operation corresponding to the setting guide at the time of initial setting.

  Further, in the present embodiment, when the user operates the preset button PB after such a preset by the preset unit 15 is performed, the channel selection control unit 14 reads the operated preset button from the preset information storage unit 16. Preset information corresponding to the PB number is read out. The channel selection control unit 14 performs channel selection control on the tuner 3 so as to select a broadcast station to which a physical channel corresponding to the read preset information is assigned. In accordance with this channel selection control, the tuner 3 selects a broadcast station associated with the operated preset button PB. Thereby, the broadcast signal of the broadcasting station associated with the preset button PB is received by the tuner 3, and the broadcast content is reproduced (display / audio output) through demodulation, error correction, demultiplexing and decoding. become.

  Furthermore, in this embodiment, the tuning control unit 14 and the tuner 3 function as first affiliated station search means. That is, the channel selection control unit 14 indicates that the viewing station that is reproducing the broadcast content as the first broadcast station selected by the operation of the preset button PB as described above cannot receive, for example, The detection is made based on the fact that the received electric field strength of the viewing station acquired from the tuner 3 is less than the threshold value. In this case, the channel selection control unit 14 selects a second affiliated station (second broadcast station) that can receive the same series as the viewing station from the physical channels (13 to 62ch) by channel selection control for the tuner 3. ) To search. This affiliated station (hereinafter referred to as a viewing station affiliated station) search (hereinafter referred to as a first affiliated station search) is performed by the physical channel (the first channel assigned to the viewing station during reproduction of the broadcasting content of the viewing station). Starting from the physical channel) in ascending order of the channel number. In the first affiliated station search, the broadcast station program-related information sequentially selected by the tuner 3 is compared with the preset information of the viewing station to determine whether the broadcast station is the affiliated station of the viewing station. It is to judge whether. At this time, the fact that the affiliated station is receivable may be determined based on the fact that the received electric field strength of the affiliated station is greater than or equal to the threshold value. When a viewing station affiliated station is found by such a first affiliated station search, the channel selection control unit 14 ends the first affiliated station search at that time. Even when the viewing station affiliated station is not found, if the completion of the first affiliated station search using all physical channels as a search destination is detected, the first affiliated station search may be terminated.

  As shown in FIG. 1, the digital broadcast receiver 1 has a preset control unit 17 as preset control means. When the preset station 17 finds the viewing station affiliated station by the first affiliated station search, the preset control unit 17 selects the viewing station affiliated station for the preset station 15 and the broadcast contents of the viewing station at the plurality of preset buttons PB. Control for presetting in association with a preset button PB (first preset button) that has been preset in association with a viewing station during reproduction is performed. When such control is performed, the preset unit 15 presets the viewing station affiliated station in association with the preset button PB associated with the viewing station instead of the viewing station. . The preset at this time may be performed by updating and recording predetermined preset information (see FIG. 3) regarding the viewing station affiliated station in the preset information storage unit 16 as in the case of the initial preset.

  In addition to the above-described configuration, the digital broadcast receiving apparatus 1 further includes a configuration specific to the present embodiment.

  That is, in the present embodiment, the tuning control unit 14 and the tuner 3 function as second affiliated station search means. Specifically, the channel selection control unit 14 is preset in association with a preset button PB other than the preset button PB that is preset in association with the viewing station during reproduction of the broadcast content of the viewing station. When there is at least one broadcasting station (hereinafter referred to as a non-viewing registration station) as a broadcasting station, the second affiliated station is selected by tuning control for the tuner 3 during the first affiliated station search period. Search is to be performed. However, the second affiliated station search means a search for a receivable affiliated station (fourth broadcast station) corresponding to a non-viewing registration station (the same applies hereinafter). Further, the channel selection control unit 14 can confirm the presence of the non-viewing registration station by the preset information.

  Here, the second affiliated station search is performed in ascending order of the channel numbers in parallel with the first affiliated station search, using the same physical channel as the search destination in the first affiliated station search as the search destination. Yes. The second affiliated station search is similar to the first affiliated station search in that the preset information of the non-viewing registration station is compared with the program-related information of the selected broadcast station, and the selected broadcast station is selected. This is performed based on the received electric field strength. The second affiliated station search during the first affiliated station search is started at the same time as the first affiliated station search after the viewing station becomes unable to receive, for example, It ends at the end of the affiliated station search. However, if receivable affiliated stations corresponding to all non-viewing registered stations (hereinafter referred to as non-viewing registered affiliated stations) are found before the end of the first affiliated station search, The affiliated station search may be terminated.

  When a non-viewing registration station affiliated station is found by such a second affiliated station search, the preset control unit 17 makes the non-viewing registration station affiliated station correspond to the non-viewing registration station affiliated station. Control is performed for presetting in association with a preset button PB (a preset button other than the first preset button) preset in association with the viewing registration station. When such control is performed, the preset unit 15 associates a non-viewing registration station affiliated station with a preset button PB that has been preset in association with the non-viewing registration station instead of the non-viewing registration station. To be preset.

  In addition to the above configuration, in the present embodiment, the channel selection control unit 14 and the tuner 3 use all of the plurality of physical channels (13 to 62 ch) as search destinations during the first affiliated station search period. If the second affiliated station search has not been completed, during a predetermined period (hereinafter referred to as a search resuming period) from a predetermined switching point of the broadcast content after the start of reproduction of the broadcast content of the viewing station affiliated station. The second affiliated station search is resumed. However, when all non-viewing registered station affiliate stations are found by the second affiliate station search during the first affiliate station search, the second affiliate station search need not be resumed.

  Here, in the second affiliated station search during the search resumption period, the remaining affiliated channels for which the second affiliated station search is not executed in the plurality of physical channels (13 to 62ch) are set as search destinations to the viewing station affiliated stations. The physical channel (third physical channel) corresponding to the channel number next to the assigned physical channel (second physical channel) is set in ascending order of channel numbers. The second affiliated station search during such a search resuming period starts simultaneously with the start of the search resuming period triggered by the detection of a change in the broadcast content of the viewing station affiliated station, and simultaneously with the end of the period. It is supposed to end. However, if all of the remaining non-viewing registered affiliated stations are found before the end of the search resumption period, or if a search with all the remaining physical channels as search destinations is completed, the second The affiliated station search may be terminated. Note that the channel selection control unit 14 may detect the change in the broadcast content of the viewing station affiliated station based on the program related information. As an example of this switching, there is switching from a broadcast program of a viewing station affiliated station to CM, and in this case, from switching to the CM (start of CM) to returning to the broadcast program (end of CM). This time, that is, the CM broadcast period may be set as the search resumption period. However, the channel selection control unit 14 may detect the start of CM by detecting the switching between subtitled and non-subtitled and the switching between bilingual broadcasting and stereo / monaural broadcasting based on the broadcast wave. Good. Alternatively, based on the EPG (Electronic Program Guide), the time of a predetermined time before the start time of the broadcast program (for example, 15 seconds to 1 minute before) is grasped, and the fact that the grasped time has been reached is determined by the CM. You may impersonate the start. Furthermore, if information indicating the start of CM is added to the broadcast wave in the future, the start of CM may be detected by acquiring such information. On the other hand, regarding the end of the CM, since the CM broadcast time is at least about 15 seconds, it can be assumed that the end of the CM is 15 seconds after the start of the CM detected or simulated as described above. Good. However, in this case, a time longer than 15 seconds (for example, 30 seconds) may be set by the user setting. If information indicating the end of CM is added to the broadcast wave in the future, the end of CM may be detected by acquiring such information. In addition to this, as the switching of the broadcasting contents of the viewing station affiliated station, it is possible to adopt switching without interposing the CM from the previous program to the next program. In this case, a predetermined time (for example, 30 seconds) from the start time of the next program can be set as the search resumption period. Note that the subsequent handling of the non-viewing registered station affiliated station found by the second affiliated station search during the search resumption period is found by the second affiliated station search during the first affiliated station search period. This is similar to the non-viewing registration station affiliated station (preset in association with the corresponding preset button).

  In addition to the above-described configuration, in the present embodiment, the channel selection control unit 14 and the tuner 3 all of the remaining physical channels during the initial search resumption period after the reproduction of the broadcast content of the viewing station affiliated station is started. If the second affiliated station search is not completed, the second affiliated station search is completed until the second affiliated station search is completed with all the remaining physical channels as the search destination. The restart is repeated. However, if all the non-viewing registered station affiliated stations are found during the search resumption period, the second affiliated station search may be terminated at that time even if there are remaining search destinations.

  Here, in the second affiliated station search that is repeatedly resumed, the second affiliated station search up to the previous time in the remaining physical channel is not performed every time a new search is resumed after the initial search resumed period. Corresponding to the channel number next to the physical channel (fourth physical channel) that is the last search destination in the second affiliated station search during the previous search resumption period, with the remaining physical channel of execution as the search destination. A physical channel (fifth physical channel) is used as a starting point, and the processing is performed in the order of channel numbers. Regarding the subsequent handling of the non-viewing registered station affiliate station found by the second affiliated station search during the second and subsequent search resumption periods, the second affiliated station during the first affiliated station search period will be described. It is the same as the non-viewing registration station affiliated station found by the search.

  Next, FIG. 4 shows a specific example of the operation of the digital broadcast receiving apparatus 1 in the same channel assignment column as in FIGS. The details of the channel assignment column in FIG. 4 are basically the same as those shown in FIG. 5 and FIG. 6, and therefore, explanations are omitted or simplified except for parts specific to this embodiment.

  First, in step 1 (ST1) of FIG. 4, the moving body is located in area A, and physical channels are assigned to broadcasting stations similar to those shown in FIG. At this time, it is assumed that the 18ch broadcasting station preset in association with the No. 4 preset button by the preset unit 15 is viewing the broadcast content as a viewing station. Therefore, the broadcasting stations preset in association with preset buttons (1, 2, 5, 6, and 8) other than No. 4 in Step 1 (ST1) are non-viewing registration stations.

  Next, when the mobile body leaves area A and enters area B, as shown in step 2 (ST2), the viewing station is out of the broadcast area and cannot be received. At this time, non-viewing registration stations other than the 13ch non-viewing registration station preset in association with the second preset button cannot be received in the same manner as the viewing station.

  Next, in step 3 (ST3), the first affiliated station search and the second affiliated station search are performed in the manner described above, when the channel selection control unit 14 and the tuner 3 cannot receive the viewing station. Both searches are terminated when a viewing station affiliated station is found. In the example of FIG. 4, both searches are performed in ascending order of channel numbers starting from 18ch corresponding to the viewing station.

  Next, in step 4 (ST4), the preset control unit 17 controls the viewing station affiliated station and the non-viewing registered affiliated station found in step 3 (ST3) in association with the preset buttons of the corresponding numbers. To do. Here, as can be seen from step 4 (ST4), the first affiliated station search and the second affiliated station search in the example of FIG. 4 are performed from 18ch corresponding to the viewing station to 24ch corresponding to the viewing station affiliated station. Each physical channel is used as a search destination. Among the physical channels in the meantime, 19ch non-viewing registration station affiliated station corresponding to the non-viewing registration station assigned 16ch in area A and non-viewing registration assigned 20ch in area A There are 21ch non-viewing registered station affiliated stations corresponding to the stations. Therefore, in the second affiliated station search in step 3 (ST3), these two non-viewing registration station affiliated stations are found, and in step 4 (ST4), as shown in the drawing, these two non-viewing registration station affiliated stations. Stations are newly preset in association with preset buttons (No. 6, No. 8) having the same numbers as the corresponding non-viewing registration stations. The preset of the non-viewing registered station affiliated station may be performed after completion of the first affiliated station search, or may be performed every time it is found.

  Here, since the second affiliated station search in step 3 (ST3) is not performed using all physical channels (13 to 62ch) as search destinations, the second affiliated station search has not been executed yet. There are physical channels (25-62, 13-17ch). Therefore, if the switching from the broadcast program to CM is detected for the first time based on the broadcast wave after starting the viewing of the broadcast program of the viewing station affiliated station in area B, as shown in step 5 (ST5). Then, the channel selection control unit 14 and the tuner 3 perform the second affiliated station search during the first CM period as the first search resuming period. The second affiliated station search in step 5 (ST5) is performed in ascending order of channel numbers starting from the next 25 ch that is the last search destination in step 3 (ST3). If the end of the first CM period is detected, the second affiliated station search in step 5 (ST5) is ended.

  Next, in step 6 (ST6), under the control of the preset control unit 17, the non-viewing registered station affiliate station found in step 5 (ST5) is preset in association with the preset button of the corresponding number. Here, as can be seen from step 6 (ST6), in the second affiliated station search of step 5 (ST5), 28ch non-viewing registration station corresponding to the non-viewing registration station to which 22ch was allocated in area A. An affiliated station is found, and in step 6 (ST6), as shown in the figure, this 28ch non-viewing registered station affiliated station is newly associated with the preset button (number 5) of the same number as the corresponding non-viewing registered station. Is preset.

  Here, the second affiliated station search in step 5 (ST5) searches all remaining physical channels (25 to 62, 13 to 17ch) for which the second affiliated station search in step 3 (ST3) has not been executed. Since it was not performed first, physical channels (for example, 51 to 62, 13 to 17 ch) in which the second affiliated station search has not been performed remain. In addition, a non-viewing registration station affiliated station corresponding to a non-viewing registration station to which 14ch is assigned in area A has not yet been found.

  Therefore, after the end of the first CM period, when switching to the CM from the broadcast program is detected again after resuming the viewing of the broadcast program of the viewing station affiliated station, as shown in step 7 (ST7). Then, the channel selection control unit 14 and the tuner 3 perform a second affiliated station search during the second CM period. The second affiliated station search during the second CM period starts from the physical channel (for example, 51ch) next to the physical channel (for example, 50ch) that was the last search destination in step 5 (ST5). Perform in ascending order of channel numbers. At this time, if the search destination reaches 62ch, the search in ascending order is continued from the first 13ch. If the end of the second CM period is detected, the second affiliated station search in step 7 (ST7) is ended.

  Next, in step 8 (ST8), under the control of the preset control unit 17, the non-viewing registration station affiliated station found in step 7 (ST7) is preset in association with the corresponding preset button. Here, as can be seen from step 8 (ST8), in the search of step 7 (ST7), a 17-ch non-viewing registration station affiliated station corresponding to the non-viewing registration station assigned 14ch in area A is found. In step 8 (ST8), as shown in the figure, the 17ch non-viewing registration station affiliated station is newly preset in association with the preset button (No. 1) having the same number as the corresponding non-viewing registration station. .

  In this way, it is possible to preset non-viewing registration station affiliated stations corresponding to all non-viewing registration stations.

  As described above, according to the present embodiment, when the viewing station becomes unable to receive, not only the viewing station affiliated station but also the non-viewing registered station affiliated station is searched, and the corresponding non-viewing registered Since a new preset can be made in association with the preset button having the same number as the station, an affiliated station can be quickly selected outside the broadcast area even for a non-viewing registered station.

  In addition, this invention is not limited to embodiment mentioned above, A various change can be made in the limit which does not impair the characteristic of this invention.

  For example, the present invention can be effectively applied to known digital television broadcasts other than terrestrial digital broadcasts.

  In addition to the vehicle, for example, a mobile phone can be applied as the moving body.

DESCRIPTION OF SYMBOLS 1 Digital broadcast receiver 3 Tuner 4 Demodulation part 5 Error correction part 6 Demultiplexer part 7 Video decoder 8 Audio decoder 9 Image composition part 10 Display 11 Speaker 14 Channel selection control part 15 Preset part

Claims (4)

Mounted on mobile objects,
Multiple preset buttons that can be selectively operated,
Preset means for registering a receivable broadcasting station to which a corresponding physical channel is assigned in a plurality of predetermined physical channels in association with the preset button;
Channel selection means for selecting the broadcast station registered by the preset means according to the operation of the preset button associated with the broadcast station;
Reproduction means for reproducing the broadcast contents of the broadcast station received from the broadcast station selected by the channel selection means;
When the first broadcast station corresponding to the broadcast content being played back by the playback means becomes unreceivable, the first of the plurality of physical channels that can be received in the same series as the first broadcast station. 2 broadcast stations are searched in order of channel numbers starting from the first physical channel assigned to the first broadcast station during the reproduction of the broadcast content of the first broadcast station, and the second broadcast station A first affiliated station search means for ending the search at that time if found,
When the second affiliated station is found by the first affiliated station search means, the second broadcast station is assigned to the preset means by the first broadcast station in the plurality of preset buttons. A digital broadcast receiving apparatus comprising: preset control means for performing control for registering in association with the first preset button that has been registered in association with the first broadcasting station during reproduction of broadcast content. ,
When there is at least one third broadcast station registered in association with a preset button other than the first preset button in the plurality of preset buttons during reproduction of the broadcast content of the first broadcast station. During the search period of the second broadcast station, the fourth broadcast station of the same series as that of the third broadcast station is searched for the same physical channel as the search destination of the second broadcast station. First, the second affiliated station search means for searching in the order of the channel numbers in parallel with the search for the second broadcasting station,
When the fourth broadcast station is found by the second affiliated station search means, the preset control means sets the fourth broadcast station to the third broadcast station with respect to the preset means. A digital broadcast receiving apparatus characterized by performing control for registering in association with a preset button other than the first preset button registered in association with the first preset button. The second affiliated station search means, when the search of the fourth broadcast station with all of the plurality of physical channels as a search destination is not completed during the search period of the second broadcast station. The fourth broadcast station is connected to the fourth broadcast station in the plurality of physical channels during a predetermined period from the predetermined switching time of the broadcast content after the start of reproduction of the broadcast content of the second broadcast station. The remaining physical channels that have not been searched for are set as search destinations, and the third physical channel corresponding to the channel number next to the second physical channel assigned to the second broadcasting station is set as the starting point in order of the channel numbers. The digital broadcast receiver according to claim 1, wherein the search can be performed again. The second affiliated station search means includes the fourth broadcasting station that uses all of the remaining physical channels as a search destination during the first predetermined period after the start of reproduction of the broadcast content of the second broadcasting station. If the search of the fourth broadcasting station with all the remaining physical channels as search destinations is completed, the search for the new predetermined period after the first predetermined period is completed. Each time the fourth broadcast station is used as the search destination for the remaining physical channel that has not been searched for the fourth broadcast station in the remaining physical channel, the fourth broadcast station during the previous predetermined period of time. Repeat the process of searching again in order of channel number starting from the fifth physical channel corresponding to the channel number next to the fourth physical channel that is the last search destination in the search for the broadcasting station. Possible that it is a digital broadcast receiving apparatus according to claim 2, wherein. The switching time includes a switching time from the broadcast program of the second broadcasting station to CM,
The digital broadcast receiving apparatus according to claim 2 or 3, wherein the predetermined period corresponding to the switching time to the CM is a broadcast period of the CM.

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