JP2009260812A - Digital broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To adopt a digital broadcast receiver for efficiently scanning channels by excluding channels which is unnecessary when scanning channels. <P>SOLUTION: A digital broadcast receiver includes: a reception unit for receiving a terrestrial digital broadcast from a broadcast station; a tuner for selecting and receiving a prescribed channel from the terrestrial digital broadcast received by the reception unit; a channel list for storing channels selectable for the tuner; and a scan control unit which performs control to scan the terrestrial digital broadcast in order to determine selectable channels in the terrestrial digital broadcast. The scan control unit performs control to make a scan for determining selectable channels except the channels stored in the channel list. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a digital broadcast receiving apparatus.

  2. Description of the Related Art Conventionally, digital broadcast receivers that receive terrestrial digital broadcasts transmitted from broadcast stations are known. First, a conventional terrestrial digital broadcasting system will be described with reference to FIG. As shown in FIG. 10, in the terrestrial digital broadcasting, a band having a width of 6 HMz per channel is divided into 13 segments of “0” to “12” by 428 KHz.

  In recent years, devices capable of receiving terrestrial digital broadcasts in mobile devices such as mobile phones and car navigation devices are known. In the case of these movable digital broadcast receiving apparatuses, the receivable broadcasting stations (channels) differ depending on the position of the apparatus. Therefore, it is necessary to check broadcast stations (channels) that can be received by the digital broadcast receiving apparatus.

  At this time, for example, when the user selects a location where the terminal is currently located, a channel list that can be received corresponding to the selected location is selected, or the digital broadcast receiving device scans all channels. Thus, a method for detecting a channel that can be received as a digital broadcast is known (for example, see Non-Patent Document 1).

  As an example, the case of one-segment broadcasting that is broadcasting for mobile terminals will be described. In the case of one-segment broadcasting, the center segment (segment 0) of terrestrial digital broadcasting is used. Therefore, a method is adopted in which segment 0 is searched for each channel and the presence / absence of a broadcast channel is determined. If there is a broadcast channel, it is stored in the channel list as a receivable channel. When the user selects a channel, the user can easily select a channel that can be received by the device by referring to the channel list.

On the other hand, a segment separation broadcasting system is known as an extension of the terrestrial digital broadcasting system. The segment separation broadcasting system is different from the above-described one-segment broadcasting, and a broadcasting service can be configured by any segment from “0” to “12” segments.
(For example, see Non-Patent Document 2)
Instruction Manual FOMA SH905i, [online], NTT DOCOMO, http://www.nttdocomo.co.jp/binary/pdf/support/trouble/manual/download/905i/sh905i/SH905i_E_14.pdf NHK One-Seg consolidated retransmission broadcast, http://www.nhk.or.jp/strl/publica/giken_dayori/jp2/rd-0702-2.html

  Here, in order to find a broadcasting service of the broadcasting system, a receiver corresponding to the segment separation broadcasting system described above needs to scan all 13 segments for each channel. In this case, there is a problem that it takes a maximum 13 times the scanning time theoretically compared with the method of searching only segment 0 according to the conventional method.

  In view of this, it is currently under consideration to provide a content broadcasting service provided locally in a part of the terrestrial digital broadcasting service area by using a segment separation broadcasting system. In this case, the frequency channel already used in the conventional terrestrial digital broadcasting (one-segment broadcasting) is not used, and it is expected to broadcast using an empty channel at that location in order to prevent interference.

  When scanning segmented broadcasting, it has been necessary to scan a one-seg broadcasting channel, which is assumed not to be segmented broadcasting, in the conventional method. As a result, it is necessary to scan extra channels, and it takes time to scan a desired broadcast service.

  Therefore, in view of the above-described problems, the present invention aims to apply a digital broadcast receiving apparatus that can efficiently perform channel scanning by excluding channels that do not require scanning when scanning channels. That is.

  In view of the above-described problems, a digital broadcast receiving apparatus of the present invention includes a receiving unit that receives a digital broadcast from a broadcasting station, a tuner that selects and receives a channel from the digital broadcast received by the receiving unit, and A channel list that stores channels that can be selected by the tuner unit; and a scan control unit that performs control to scan the digital broadcast in order to determine channels that can be selected in the digital broadcast. The control unit performs scanning control to determine a channel that can be selected by excluding channels stored in the channel list.

  Further, in the digital broadcast receiving apparatus of the present invention, the scan control unit searches for one segment from a plurality of segments included in the channel to determine whether or not the channel can be selected. It is characterized by determining.

  In the digital broadcast receiving apparatus of the present invention, the scan control unit further includes determining a segment to be searched according to a type of terrestrial digital broadcast received by the receiving unit.

  In the digital broadcast receiving apparatus of the present invention, the scan control unit determines a width of an increment to a frequency to be searched next in the scan in accordance with contents of a broadcast signal received by the scan. .

  Further, in the digital broadcast receiving apparatus of the present invention, the channel list further stores the received intensity of the channel received by the tuner as a discriminant value, and the scan control unit determines whether the received intensity of the channel at the current position is If it is less than or equal to the discriminant value described in the channel list, a channel having a reception intensity less than or equal to the discriminant value is set as a scan target.

  The digital broadcast receiver according to claim 1, wherein the scan control unit includes a segment-separated broadcast channel discovered by a previous scan as a scan target.

  The digital broadcast receiving apparatus of the present invention includes a receiving unit that receives a terrestrial digital broadcast in which one channel is composed of 13 segments from a broadcasting station, and a specified channel from the terrestrial digital broadcast received by the receiving unit. A tuner unit that receives a 0 segment, a channel list that stores channels that can be selected by the tuner unit, and a channel that can be selected in the terrestrial digital broadcast, in order to determine a channel that can be selected, A scan control unit that searches for each channel by searching for a segment, and the scan control unit excludes the channels stored in the channel list and determines channels that can be selected It is characterized by performing scanning control.

  As described above, according to the present invention, a tuner unit that receives terrestrial digital broadcast from a broadcast station and selects and receives a predetermined channel from the received terrestrial digital broadcast, and the tuner unit selects the channel. A digital broadcast reception comprising: a channel list that stores channels that can be stationed; and a scan control unit that controls scanning of the terrestrial digital broadcast in order to determine a channel that can be selected in the terrestrial digital broadcast. With respect to the apparatus, scanning control is performed to determine channels that can be selected by excluding channels stored in the channel list. Therefore, the required time can be greatly reduced as compared with the case where the digital broadcasting apparatus newly scans all channels and registers channels.

  The best mode for carrying out the present invention will be described below with reference to the drawings. In the present embodiment, as an example, a case where the digital broadcast receiving apparatus according to the present invention is applied to a mobile phone having a terrestrial digital broadcast receiving function will be described.

  FIG. 1 is a diagram showing the appearance of the mobile phone 1. The mobile phone 1 includes a display unit 50, an input unit 60, a speaker 75, and a microphone 85. Further, a terrestrial digital broadcast receiving antenna 38 for receiving terrestrial digital broadcast is connected.

  FIG. 2 is a diagram for explaining a functional configuration of the mobile phone 1. As shown in FIG. 2, the mobile phone 1 is connected to the control unit 10 via the bus, the communication control unit 20, the decoder unit 30, the storage unit 40, the display unit 50, the input unit 60, and the voice decoding unit 70. Are connected to the speech encoding unit 80. Further, a communication antenna 28 is connected to the communication control unit 20 via the communication RF unit 25, and a terrestrial digital broadcast reception antenna 38 is connected to the decoder unit 30 via the TV RF unit 35. ing.

  In addition, a speaker 75 is connected to the audio decoding unit 70, and a microphone 85 is connected to the audio encoding unit 80.

  The control unit 10 (scan control unit) is a functional unit that performs various operations and controls of the mobile phone 1. Further, it is a functional unit that implements each process by reading and executing various programs stored in the mobile phone 1.

  The communication control unit 20 controls the communication RF unit 25 to perform transmission and reception of communication signals related to the mobile phone via the communication antenna 28. In addition, the control used in the telephone call / communication in the cellular phone 1 is an existing CDMA2000 (Code Division Multiple Access 2000) method, W-CDMA (Wideband Code Division Multiple Access) method, GSM (Global System for Mobile Communications), etc. Any of these methods may be used, and detailed description thereof is omitted.

  The RF unit for TV 35 receives the terrestrial digital broadcast transmitted from the broadcast station by OFDM modulation via the terrestrial digital broadcast receiving antenna 38. Then, the TV program unit 35 selects a desired program (channel) from the received broadcast wave by the built-in tuner unit, and outputs it to the decoder unit 30 as a transport stream (TS).

  The decoder unit 30 is a functional unit that decodes the transport stream (TS) input from the TV RF unit. Video data, audio data, and the like are decoded from the transport stream (TS). The video data is output to the display unit 50, and the audio data is output to the audio decoding unit 70.

  The storage unit 40 is a memory that can be written at any time to store programs, data, various settings, and the like in the mobile phone 1. The storage unit 40 is configured by a storage device such as a semiconductor memory (for example, a DRAM or a memory card). In the present embodiment, a channel list 42 is stored in the storage unit 40.

  The channel list 42 is a list that stores reception channels when the mobile phone 1 receives terrestrial digital broadcasting. Here, the channel list 42 includes a one-seg channel list 422 and a segment-separated broadcast channel list 424.

  The one-segment channel list 422 is a channel list that is referred to when the mobile phone 1 receives a one-segment broadcast. As shown in FIG. 3, the one-segment channel list 422 stores a channel number (eg, “13”) and a broadcasting station name (eg, “ΔΔ broadcast”) in association with each other.

  The segment separated broadcast channel list 424 is a channel list that is referred to when the mobile phone 1 receives a segment separated broadcast. As shown in FIG. 4, the segment separated broadcasting channel list 424 includes a channel number (for example, “18”), a segment (for example, “3”), a broadcasting station name (for example, “Δ □ local broadcasting”), and the like. Are stored in association with each other.

  The display unit 50 is a functional unit for displaying various character strings and videos on the mobile phone 1. Here, the display unit 50 is realized by a TFT (Thin Film Transistor) liquid crystal, an organic EL (electroluminescence) display, or the like.

  The input unit 60 is a functional unit for transmitting an operation input from the user to the control unit 10. Here, as shown in FIG. 1, the input unit 60 is described as an example using a button in the present embodiment, but it is needless to say that the input unit 60 can also be realized in a touch panel or the like.

  The audio decoding unit 70 is a functional unit that decodes input audio data and outputs the audio data to the speaker 75 as an audio signal. The speaker 75 outputs the audio signal input from the audio decoding unit 70. In the present embodiment, a speaker is used as an example of an audio output device, but other similar devices such as an earphone may be used.

  The audio encoding unit 80 is a functional unit that encodes an audio signal input from the microphone 85 and outputs the audio signal as audio data.

[Process flow]
Next, processing in the mobile phone 1 will be described using the operation flow of FIGS. 5 and 6.

  First, the control unit 10 detects various events after completing the activation process (step S10). Here, the event refers to, for example, a case where a key input event is detected from the input unit 60 or a case where a call incoming event is detected by the communication control unit 20. When an event is detected (step S10; Yes), the type of the detected event is determined.

  First, when the event is a scan instruction (trigger) in terrestrial digital broadcasting (terrestrial digital broadcasting) (step S12; Yes), that is, an operation of activating the one-segment function in the application of the mobile phone 1 and performing channel scanning. If so, the control unit 10 instructs the TV RF unit 35 to scan in the terrestrial digital broadcast reception mode (step S14).

  Here, the “terrestrial digital broadcast reception mode” refers to a tuner control mode in which the tuner is controlled to search only the segment 0 in each channel in order to receive the one-segment broadcast in the terrestrial digital broadcast.

  In this embodiment, “scan” is used when examining a plurality of segments and channels, and “search” is called “search” when examining a specific segment (one segment). And

  The RF unit for TV 35 scans only the segment 0 divided into 13 segments numbered 0 to 12 in each channel from “13” ch of the UHF band to “62” ch in order. Execute. When a broadcast wave can be received by the tuner during the search (when the tuner can be locked), the received transport stream (TS) is delivered to the decoder unit 30.

  As a result of the analysis of the transport stream (TS) by the decoder unit 30, when a broadcast service is found in the channel being scanned (step S16; Yes), the control unit 10 displays the found broadcast in the one-segment channel list 422. The service broadcasting station name and the channel number are stored in association with each other (step S18).

  After registering a channel in the one-segment channel list 422, the control unit 10 determines whether the channel is the last channel (“62” ch) (step S20). If the channel is not the last channel (step S20; No), the setting of the TV RF unit 35 is incremented to the segment 0 of the next channel (that is, increased by 6 MHz) and the process is executed from step S14 (step S14). S22 → step S14).

  On the other hand, if the channel is the last channel (step S20; Yes), it is determined that the scan in the terrestrial digital broadcast reception mode is completed, and the process shifts to the event waiting state in step S10.

  If the broadcast service is not found in step S16 (step S16; No), the control unit 10 moves to step S20 without performing anything and checks whether the channel is the last channel. Connected with The processing after moving to step S20 is the same as when the broadcast service is found.

  Next, when the detected event is a scanning event (trigger) in segment separation broadcasting (step S12; No → step S22; Yes), that is, the segment separation broadcasting reception function is activated by the application of the mobile phone 1. When an operation for performing scanning is performed, the process proceeds to step S30 in FIG.

  When the detected event is neither “scan with terrestrial digital” nor “scan with segmented broadcasting” (step S12; No → step S22; No), the control unit 10 detects the detected event. The process corresponding to is executed, and a transition is made to a wait state for detecting the next event (step S24 → step S10).

  Next, processing from step S30 when an event of a scan in segment separation broadcasting is detected will be described with reference to FIG.

  The “segment separated broadcast reception mode” refers to a tuner control mode in which the tuner is controlled to search for an arbitrary segment in each channel in order to receive the segment separated broadcast.

  The control unit 10 instructs the TV RF unit 35 to scan in the segment separation broadcast reception mode, and is stored in the channel list 42 of the storage unit 40 and used for the one-segment function until just before. With reference to the channel list 422, it is determined whether or not the channel being scanned is a channel existing in the one-segment channel list 422 (step S30).

  Here, if the channel being scanned is included in the one-seg channel list 422 to be referred to (step S30; Yes), the control unit 10 determines that segment separation broadcasting is not performed on the channel. (Step S32), the channel (that is, scanning for 13 segments) is skipped, and the process proceeds to S30.

  If the channel being scanned is not included in the one-seg channel list (step S30; No), it is next determined by the user whether or not there is a segment number setting for the application to be scanned. Confirm (step S34).

  When there is no segment number setting of the scan target by the user (step S34; No), the scan target segment in the channel currently being scanned is set to “0” to “12”, and the scan operation is executed for all the segments. To do. That is, in the channel being scanned, the presence / absence of the segment separation broadcasting service is confirmed one by one (that is, in units of 428 kHz) for 13 segments in an arbitrary order.

  Here, the band of one segment is 428 kHz because 13 of 6 MHz divided per channel (6 MHz ÷ 14≈428 kHz) is 13 for broadcasting and the other one is to prevent interference with adjacent channels. This is because it is configured as a guard band.

  On the other hand, when the segment number is set by the user (step S34; Yes), the scan operation is executed by searching only the segment of the set number (step S38).

  When the segment separated broadcast service is detected as a result of the scan (step S40; Yes), the control unit 10 associates the broadcast station of the found broadcast service with the channel and segment number in the segment separated broadcast channel list 424. Register (step S42).

  Subsequently, the control unit 10 determines whether the channel is the last channel (step S44). If the channel is not the last channel (step S44; No), the channel to be scanned is incremented, and the processing is repeated from step S30 (step S46 → step S30). On the other hand, if the channel is the last channel (step S44; Yes), the scan in the segment separation broadcast mode is completed, and the process transitions to step 10 in FIG.

[Operation example]
Specifically, the operation of the mobile phone 1 will be specifically described with reference to the drawings. FIG. 7 is a diagram showing an example of a display screen W100 displayed on the display unit 50 of the mobile phone 1.

  The content of the one-seg channel list 422 is displayed on the display screen W100. In step S14 of FIG. 5, the segment 0 is searched, and the channel where the broadcast service is found is stored in the one-segment channel list 422. The channel number and the broadcast station name stored in the one-segment channel list 422 are displayed on the display screen W100.

  The user can select a desired channel with reference to the channel list displayed on the display screen W100.

  Subsequently, the display screen W102 of FIG. 8 is a diagram illustrating an example in the case of displaying a channel list for segment separation broadcasting. For example, the one-segment channel list 422 used in the terrestrial digital (one-segment) reception mode before scanning in the segment separation broadcast reception mode is as shown in FIG. 7, for example. Therefore, it can be seen that in the one-segment broadcasting area where the mobile phone 1 is located, the one-segment broadcasting is configured in the frequencies of “13” ch to “17” ch, and the frequency is used.

  In this state, when scanning is performed in the segment separated broadcast reception mode, “empty channels” (“18” ch to “62”) in the broadcast area excluding the one-segment broadcasting channels “13” to “17” ch. ch), the segment separation broadcasting service is scanned, and “13” ch to “17” ch are skipped. Accordingly, the time required for scanning can be shortened by eliminating the channels stored in the one-segment channel list 422. A new channel is stored in the segment separated broadcast channel list 424, and the channel list stored in the segment separated broadcast channel list 424 is displayed on the display screen W102 of FIG.

  Here, according to the display screen W102, five segment separate broadcasting services of “18” channel segment numbers “3” and “10” and “20” channel segment numbers “0”, “4” and “9” are provided. It shows that it was memorized as.

  As described above, according to the present embodiment, when a new channel that can be received by the digital broadcast receiving device is detected, the channels that have been set to be receivable by the digital broadcast receiving device up to that time (in the one-seg channel list 422). By excluding the described channels), the required time can be shortened as compared with the case of scanning all the channels.

[Modification]
As described above, in the present embodiment, the case where the digital receiver is applied to a mobile phone has been described. However, the applicable device is not limited to a mobile phone. For example, the present invention can also be applied to other devices having a function of receiving terrestrial digital broadcasting, such as a car navigation system having a terrestrial digital broadcast receiving function, a computer, and a PDA (Personal Digital Assistant).

  Further, the increment width when searching for a channel may be changed according to each broadcast data. The operation in this case will be described with reference to FIGS. 11 and 12 describe the contents related to the specific processing in the operation flow of FIGS. 5 and 6, and the same processes as those in FIGS. 5 and 6 are denoted by the same reference numerals and description thereof is omitted. To do.

  First, it is determined whether or not the detected event is a scanning operation (step S50). Here, in the case of a scanning operation (step S50; Yes), only the segment with number 0 is searched (step S52).

  Here, as a method of operating a segment in segment separation broadcasting, when one of the channels shown in FIG. 10 is used for segment separation broadcasting, a broadcasting service using segment 0 is always provided first. It will be done. Furthermore, if the broadcasting service in segment 0 does not function as a channel guide, the presence of broadcasting service in the channel (broadcasting in other segments) can be performed by searching segment 0 first, as in the scanning of one-segment broadcasting. This is because the possibility of the existence of the service can be confirmed.

  Subsequently, when it is determined that the broadcasting system is terrestrial digital (step S54; Yes), the increment width to the frequency to be searched next may be from segment 0 to segment 0 of the adjacent channel. Based on this width, a search is performed for each channel (step S56). Here, the increment range may be set by the user, set in advance, or automatically set each time. And the process from step S16 is performed.

  On the other hand, when it is determined that the broadcast system is segment separation broadcasting (step S54; No-> step S58; Yes), the process is executed from step S70. If it is determined that the broadcast system is not segment-separated broadcasting (step S54; No-> step S58; No), it is determined that there is no broadcast, and the process is repeatedly executed from step S50.

  Next, processing from step S70 will be described. First, the increment width is set for each segment (step S70). Then, a segment other than segment 0 is scanned (step S72).

  If a broadcast service is detected in the segment, it is registered in the segment separated broadcast channel list 424 (step S40; Yes → step S42).

  If the channel is not the last segment (step S74; No), the processing target is moved to the next segment according to the increment width (step S76), and the processing is repeatedly executed from step S72.

  In the case of the last segment in the channel (step S74; Yes), it is determined whether or not it is the last channel (step S44). Here, if it is not the last channel (step S44; No), the processing target is moved to the segment 0 of the next channel, and the processing is executed from step S54 (step S78 → step S54).

  As described above, as a result of searching for segment 0, if one broadcasting system such as one-segment broadcasting or segment separation broadcasting is identified from information such as NIT (Network Information Table), the frequency to be searched next in the scan being executed is determined. The increment range can be determined. As a result, users can scan in the order of frequency channels in a mixed broadcasting format without being conscious of whether to scan in "terrestrial digital broadcast reception mode" or "segment separated broadcast reception mode". It becomes.

  For example, when scanning in “broadcasting system mixed mode” in order of frequency channels from 13 ch to 62 ch, when there is a terrestrial digital broadcasting service from 13 to 17 ch, the TS can be decoded within this channel range. Since the information is identified as terrestrial digital broadcasting, the width of the increment to the next frequency to be searched may be the channel width (6 MHz). Next, when the frequency to be searched is incremented to the segment 0 of 18ch, and it can be identified that the 18ch is the segment separated broadcast in the segment 0, in order to scan the other segment of the 18ch, the increment width is set to the segment. The unit (428 kHz) is set, and scanning is performed in the order of 9 → 7 →... 1 → 2 →.

  When the scan of all the 18ch segments is completed, the frequency is incremented to search for the 19ch segment 0, and the broadcast system of the broadcast service being performed on the 19ch is identified. If neither one-segment or segment-separated broadcasting services can be confirmed on 19ch, the frequency is incremented by 6 MHz and the next search target is set to segment 20 on 20ch.

  As described above, according to the above-described method, it is not necessary for the user to perform scanning in consideration of the broadcasting system, and a service of a plurality of broadcasting systems can be obtained by performing only one scanning of the frequency 13 to 62 ch once. It is possible to provide a scanning method capable of finding out.

  In addition, when scanning in the area of strong terrestrial digital (1 seg) radio waves, it seems that the purpose is to search for local broadcasts such as area portals. Since there is a case of searching, for example, the reception intensity may be stored in the channel list together.

  Specifically, in step S18 of FIG. 5, when a one-seg broadcast channel list is acquired and registered by scanning, the received intensity of the received channel is associated with the channel and stored in the one-seg channel list 422.

  When searching for segmented broadcasts, in the case of a channel existing in the one-segment channel list 422 in step S30 of FIG. 6, instead of step S32, first, the reception intensity at the current position of the channel is measured. If the received intensity is greater than the discriminant value, the channel is skipped and the process proceeds to the next channel. On the other hand, if the received intensity at the current position of the channel is equal to or smaller than the determination value, the process is executed from step S34.

  In this way, if the current position of the terminal changes and it is uncertain whether the one-segment broadcasting channel list matches the current position, it is a one-segment broadcasting channel that is not originally scanned, but the one-segment broadcasting channel at the current position of the terminal It is determined whether the reception intensity of the broadcast channel (which is assumed to be present) is greater than the discrimination value.

  If the received intensity of the channel is equal to or lower than the discriminant value, when the segment separation broadcast scan is executed at the current position, the weak electric field or broadcast of the broadcast service of the one-segment broadcast channel list is included by including the channel in the scan target. This makes it possible to prevent a segment separation broadcast from being missed by scanning a broadcast service outside the area.

  Here, as the discriminant value of the channel reception strength, it is conceivable as an example that the lowest one of the reception strengths of all the channels obtained by the one-segment broadcasting scan is used as the discriminant value.

  In addition, the operation mode of segment separation broadcasting provides local content (for example, floor guidance at a department store, area map at a theme park, distribution of congestion, etc.) in a local area smaller than the broadcasting area of one-segment broadcasting. It is assumed that Therefore, it is expected that the corresponding local broadcast service cannot be received immediately after leaving the local area. On the other hand, it is fully considered that a different local broadcast exists in the same segment of the same channel. It is done.

  For example, segment separated broadcasting using 20ch is provided in a certain theme park and its surrounding area, and the user stores a channel list of the segment separated broadcasting in the terminal by executing a scan. When a user leaves the theme park and stops by a department store on the way home, the user scans again when the department store is provided with department store floor guidance and in-store advertising, etc. If the channel list obtained in the vicinity of the theme park is removed from the scan target, the broadcast contents of the department store cannot be obtained / received.

  For this reason, among the channel lists acquired in the previous scan execution, in the segment separation broadcast list, by preventing the user from being excluded from the scan target in the next scan, a broadcast service limited to the local area can be provided. A scanning method that can be easily found can be provided.

  At this time, the segment separated broadcast channel list acquired around the theme park may not be discarded from the terminal. In the portable terminal having the GPS function, when the channel list is acquired, the GPS function is used to acquire the position information of the terminal at that time, and the terminal is associated with the channel list and stored in the terminal. Convenience of prompting the user to reuse the channel list without repeating the scan by notifying the user that the channel list is available when the local area is approached Can be provided.

  Further, in the above-described embodiment, the way of holding the channel list is described as being divided into two ways: the one-segment channel list and the segment separated broadcast channel list. However, how to hold a channel list is not limited to each broadcasting system, and it is obtained by scanning it using a channel list prepared in the terminal and the system of the present invention. You may have it divided like a channel list. Especially in the latter case, when linking and storing the location information of the terminal at the time of scanning and the channel list, the channel list (local broadcast list) obtained by scanning at a certain location is displayed. It becomes easy to display on the part.

  In the above-described embodiment, the terminal that receives the one-segment broadcasting and the segment separation broadcasting is described. However, the broadcasting that the terminal receives is not limited thereto. Instead of terrestrial digital broadcasting such as one-segment broadcasting, satellite digital broadcasting may be used, or one type of system (for example, only one-segment broadcasting or only full-segment broadcasting) may be used.

  In particular, the present invention is suitable for a terminal that detects a broadcast with a small service area when broadcasts with different service areas are mixed. The reason for this is that broadcasts with a small service area (for example, segment-separated broadcasts. Generally, broadcast output is weak and the channel list is not always maintained). This is because the broadcast output is generally strong and the channel list is prepared), and it is expected that the broadcast will be performed avoiding the frequency used. As a result, even if the channels described in the channel list (for example, one-segment broadcasting channels) are excluded and scanned, it is considered that all broadcasts having a small service area (for example, segment separation broadcasting) are scanned.

  In the above-described embodiment, the case where the one-seg channel list to be referred to as a comparison target has been used up to immediately before is described. It is only an example of a list of channels that are expected to be received. In particular, since the current location of the mobile phone changes frequently due to the movement of the user, the channel list used immediately before is not necessarily matched with the channel list of the one-segment broadcasting area at the current location of the mobile phone. .

  Therefore, in a receiver terminal equipped with a communication function or GPS, such as a mobile phone, the position information that can be obtained from the communication base station or the position information by GPS is used to determine the one-segment broadcasting area to which the receiver terminal currently belongs. It is also possible to identify and refer to an appropriate one-seg channel list for comparison. Further, when the control unit 10 detects a scan event in segment separation broadcasting (Step S12; No → Step S22; Yes), the control unit 10 prompts the user to select or confirm the one-segment channel list before performing the scan. A prompt message may be displayed on the display unit 50, and the one-seg channel list may be selected according to the user's operation input from the input unit 60.

  Further, in the above-described embodiment, it has been described that, in step S34, when there is no segment designation from the user, all segments are scanned in step S36. However, by searching only the segments that are initially set, The channel may be scanned.

  For example, as a method of operating a segment in segment separation broadcasting, among segments 1 shown in FIG. 10, segment 0 functions as a channel guide for explaining the broadcast service contents and segment configuration of other segments of the channel The channel guide obtained by scanning only segment 0 is stored in the terminal. If the broadcast service contents of other segments are described in the information (for example, NIT: Network Information Table) obtained by decoding the TS of the channel guide, the broadcast service contents of other segments are grasped by this. Therefore, it is not necessary to scan other segments, and the scanning efficiency can be further improved.

  In the above-described embodiment, the tuner control mode is distinguished from the “terrestrial digital broadcast reception mode” and the “segment separated broadcast reception mode”, and the case where the channel list is created separately for each broadcasting system has been described. If the user wants to search for broadcast services in order of frequency by creating a channel list in which multiple types of broadcasts are mixed in order of frequency by scanning in order of frequency without making the user aware of the broadcast system, the list It is good also as making it display based on.

  For example, the display screen W110 in FIG. 9 is a diagram illustrating an example of a case where broadcast services are listed and displayed in order of frequency across such a plurality of types of broadcast systems.

  In addition, even when acquiring the channel list separately for each broadcasting system by distinguishing the control form of the tuner, even when acquiring a channel list in which a plurality of broadcasting systems are scanned together and the broadcasting systems are mixed in order of frequency, It is possible to switch the display method such as a method of displaying a channel list for each broadcasting method or a method of displaying a channel list by sorting in order of frequency without dividing by broadcasting method. By providing such a function as a user interface of a mobile phone application, it is possible to improve user convenience.

  In the above-described embodiment, when performing a scan in the segment separation broadcast reception mode, referring to the one-segment channel list 422, if the channel is described in the one-segment channel list 422, the segment separation broadcast is immediately performed. The case where it is determined that there is no broadcasting service in the system and the corresponding channel is skipped from the scan target has been described. However, when the one-segment channel list 422 is created by scanning, the reception strength of the channel received by the tuner is It may be recorded for each channel and used to determine whether or not the channel is a scan target during the segment separation broadcast reception mode scan.

  According to this aspect, even if the channel is listed in the one-seg channel list, the recorded channel reception strength and the reception strength of the same channel in the scan of the segment separation broadcast reception mode being executed If the current reception strength is less than a certain level, the segment separation broadcasting is performed in the weak electric field area of one-segment broadcasting such as prefectural borders by incorporating it into the scan target of the segment separation broadcasting reception mode. It is possible to perform a segment separation broadcasting scan without overlooking the possibility of the existence of the service.

It is a figure which shows the external appearance of the mobile telephone in this embodiment. It is a figure which shows the structure of the mobile telephone in this embodiment. It is a figure which shows an example of the data structure of the channel list for 1seg in this embodiment. It is a figure which shows an example of the data structure of the channel list | wrist for segment isolation | separation broadcasting in this embodiment. It is a figure which shows the operation | movement flow of the mobile telephone in this embodiment. It is a figure which shows the operation | movement flow of the mobile telephone in this embodiment. It is a figure which shows an example of the display screen of the mobile telephone in this embodiment. It is a figure which shows an example of the display screen of the mobile telephone in this embodiment. It is a figure which shows an example of the display screen of the mobile telephone in this embodiment. It is a figure for demonstrating terrestrial digital broadcasting. It is a figure which shows the operation | movement flow of the mobile telephone in a modification. It is a figure which shows the operation | movement flow of the mobile telephone in a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile phone 10 Control part 20 Communication control part 25 Communication RF part 28 Communication antenna 30 Decoder part 35 TV RF part 38 Terrestrial digital broadcast receiving antenna 40 Storage part 42 Channel list 422 One-segment channel list 424 Segment separation broadcasting Channel list 50 display unit 60 input unit 70 audio decoding unit 75 speaker 80 audio encoding unit 85 microphone

Claims (7)

A receiver for receiving a digital broadcast from a broadcasting station;
A tuner unit that selects and receives a channel from the digital broadcast received by the receiving unit;
A channel list for storing channels that can be selected by the tuner unit;
In the digital broadcast, a scan control unit that performs control to scan the digital broadcast in order to determine a channel that can be selected,
With
The digital broadcast receiving apparatus according to claim 1, wherein the scan control unit performs scanning control to determine a channel that can be selected by excluding a channel stored in the channel list.   2. The scan control unit according to claim 1, wherein the scan control unit determines whether the channel can be selected by searching for one segment from a plurality of segments included in the channel. The digital broadcast receiver described.   The digital broadcast receiving apparatus according to claim 1, wherein the scan control unit further comprises determining a segment to be searched according to a type of terrestrial digital broadcast received by the receiving unit. .   The digital broadcast receiving apparatus according to claim 1, wherein the scan control unit determines a width of an increment to a frequency to be searched next in the scan according to a content of a broadcast signal received by the scan. The channel list further stores the received intensity of the channel received by the tuner as a discrimination value,
The scan control unit, if the reception intensity of a channel at a current position is equal to or less than a determination value described in the channel list, scans a channel having a reception intensity equal to or less than the determination value. Item 4. The digital broadcast receiver according to Item 1.   The digital broadcast receiving apparatus according to claim 1, wherein the scan control unit includes a segment-separated broadcast channel discovered by a previous scan as a scan target. A receiving unit for receiving terrestrial digital broadcasting in which one channel is composed of 13 segments from a broadcasting station;
A tuner unit that receives a 0 segment of a designated channel from the terrestrial digital broadcast received by the receiving unit;
A channel list for storing channels that can be selected by the tuner unit;
In the terrestrial digital broadcast, in order to determine a channel that can be selected, a scan control unit that performs a control to search each channel by searching for the 0 segment of the terrestrial digital broadcast;
With
The digital broadcast receiving apparatus according to claim 1, wherein the scan control unit performs scanning control to determine a channel that can be selected by excluding a channel stored in the channel list.