JP2006165670A - Digital broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile digital broadcast receiver capable of simplifying user's operations in the case of returning from a non-viewing mode to a viewing mode. <P>SOLUTION: A tuner section receives a broadcast wave of digital broadcasting. An output section outputs video and audio of a program included in the broadcast wave from the broadcast wave received by the tuner section. A mode switching section switches between the viewing mode for outputting the video and audio of the program and the non-viewing mode wherein the output of the video and audio of the program is stopped. When the receiver shifts from the viewing mode into the non-viewing mode, a related information storage section stores program related information obtained from the broadcast wave received by the tuner section in the non-viewing mode. A display control section displays the program related information stored in the related information storage section in the non-viewing mode in a prescribed timing after the non-viewing mode is shifted to the viewing mode. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a digital broadcast receiving apparatus, and more particularly to a digital broadcast receiving apparatus having a viewing mode for viewing a program and a non-viewing mode (for example, a power saving mode) for not viewing a program.

  In recent years, digital broadcasting in which television broadcasting signals are digitized has become widespread. In Japan, satellite digital broadcasts using broadcast satellites and terrestrial digital broadcasts instead of analog broadcasts are being broadcast and are spreading. In digital terrestrial broadcasting, in addition to indoor stationary digital broadcast receivers, portable digital broadcast receivers that can be easily carried and viewed outdoors are being developed.

Conventionally, there are portable electronic devices having a power saving mode for the purpose of reducing the power consumption of the portable electronic device. For example, an audio processing unit that decodes compressed audio data to obtain original audio data, a video processing unit that decodes compressed video data to obtain original video data, an audio unit that outputs original audio data, and original video data There is a technology for reducing power consumption in an audio / video reproduction device having a display unit that outputs a signal (see, for example, Patent Document 1). In this audio / video reproduction apparatus, power consumption can be suppressed by adopting a configuration in which the decoding process of the compressed video data in the video processing unit is stopped while the display unit is in an inoperative state.
JP 2003-87369 A

  With respect to the above-described portable digital broadcast receiving apparatus (hereinafter referred to as a portable digital broadcast receiving apparatus), a transition is made temporarily to the power saving mode while viewing a digital broadcast program, and then the viewing mode is restored. The situation can be considered. For example, a usage scene is expected in which a program is watched while on a train, and when changing trains, viewing is paused and set to a power saving mode, and viewing is resumed after changing trains. . In such a use scene, when viewing resumed after returning from the power saving mode after changing trains, a certain amount of time has passed since the previous viewing. A situation such as “the user loses interest in the program”, (2) “the program being watched ends”, and (3) “the broadcast area changes” can be considered. When such a situation occurs, the user must perform a channel selection operation to search for a program that suits the taste. Here, it is known that in digital broadcasting, it takes time to select a channel from the broadcasting format. Therefore, in the digital broadcast receiving apparatus, it takes a very long time for the user to select a program that suits his taste while performing a channel selection operation. This is inconvenient for the user.

  In the portable digital broadcast receiving apparatus, a channel list indicating channels that can be received at the present time is held. When the portable digital broadcast receiver detects that the broadcast area has changed, the channel list is updated. Here, when the situation (3) occurs in the power saving mode, the conventional portable digital broadcast receiver cannot recognize that the broadcast area has changed. Therefore, when returning from the power saving mode, the channel list before the power saving mode is retained, and as a result, the contents of the channel list may not be appropriate. At this time, the user has to search for a receivable channel by himself by selecting a channel or updating the channel list.

  Note that the above problem occurs not only when the power saving mode returns to the viewing mode, but also when returning to the viewing mode from a non-viewing mode other than the power saving mode. For example, the same problem as described above also occurs when the mode is changed to another mode because an e-mail arrives or a phone call is received while the program is being viewed, and then the mode is restored.

  SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a portable digital broadcast receiver capable of simplifying user operations when returning from the non-viewing mode to the viewing mode.

The present invention employs the following configuration in order to solve the above problems.
That is, the first invention includes a tuner unit that receives a broadcast wave of a digital broadcast, an output unit that outputs video and audio of a program included in the broadcast wave from the broadcast wave received by the tuner unit, and a video of the program And a mode switching unit that switches between a viewing mode in which audio is output and a non-viewing mode in which video and audio output of the program is stopped, and a tuner unit that shifts from the viewing mode to the non-viewing mode in the non-viewing mode. A related information storage unit for storing program related information obtained from the received broadcast wave, and a program stored in the related information storage unit at the predetermined timing after the transition from the non-viewing mode to the viewing mode A portable digital broadcast receiving apparatus including a related information display control unit for displaying related information.

  In the second invention, the digital broadcast receiving apparatus may further include a list storage unit that stores a channel list indicating channels that can be received by the tuner unit. At this time, in the non-viewing mode, the tuner unit receives broadcast waves of each channel included in the channel list in a time division manner.

  In the third invention, the digital broadcast receiving apparatus specifies a channel that can be received by the tuner unit in the non-viewing mode, and updates the channel list so that the channel list is configured by the specified channel. May be further provided. At this time, when the channel list is updated by the list update unit, the tuner unit receives broadcast waves of each channel included in the updated channel list in a time division manner.

  In the fourth invention, the broadcast wave received by the tuner unit may include area identification information. At this time, in the non-viewing mode, the list update unit specifies channels that can be received by the tuner unit based on the area identification information included in the broadcast wave received by the tuner unit.

  In the fifth invention, the related information display control unit causes the display device to display the information stored in the related information storage unit at the timing immediately after the transition from the non-viewing mode to the viewing mode. May be.

    In the sixth invention, the related information display control unit causes the display device to display the information stored in the related information storage unit in the non-viewing mode at a timing when the user selects a channel in the viewing mode. May be.

  In the seventh invention, the related information storage unit may store electronic program information acquired by analyzing a section included in a broadcast wave received by the tuner unit as program related information. At this time, the related information display control unit causes the display device to display the electronic program information stored in the related information storage unit.

  In the eighth invention, the electronic program information may include at least information indicating a program end time. At this time, in the non-viewing mode, the digital broadcast receiving apparatus is based on information indicating the end time of the program included in the latest electronic program information for a predetermined channel among the electronic program information stored in the related information storage unit. The tuner unit further includes a time determination unit that determines a time at which the broadcast wave of the predetermined channel should be received next.

  In the ninth invention, the related information storage unit may store a section included in a broadcast wave received by the tuner unit. At this time, the related information display control unit causes the display device to display the electronic program information obtained by analyzing the section stored in the related information storage unit.

  According to a tenth aspect of the present invention, there is provided a tuner unit that receives a broadcast wave of a digital broadcast, an output unit that outputs video and audio of a program included in the broadcast wave from the broadcast wave received by the tuner unit, and a tuner unit A mode that switches between a list storage unit that stores a channel list indicating receivable digital broadcast channels, a viewing mode in which program audio and video are output, and a non-viewing mode in which program audio and video output is stopped A portable digital broadcast receiver further comprising: a switching unit; and a list updating unit that identifies a channel that can be received by the tuner unit in the non-viewing mode and updates the channel list so that the channel is configured by the identified channel. It is.

  In the eleventh aspect, the list updating unit may identify channels that can be received by the tuner unit by detecting whether or not all channels that can be received are receivable.

  In the twelfth aspect of the invention, the broadcast wave received by the tuner unit may include area identification information. At this time, in the non-viewing mode, the list update unit specifies channels that can be received by the tuner unit based on the area identification information included in the broadcast wave received by the tuner unit.

Further, the present invention may be provided as a program related information display method executed in the above digital broadcast receiving apparatus.
That is, the thirteenth invention is used in a portable digital broadcast receiving apparatus having a viewing mode in which video and audio of a digital broadcast program are output and a non-viewing mode in which output of video and audio of the program is stopped. When a transition is made from the viewing mode to the non-viewing mode, a digital broadcast broadcast wave is received, program-related information obtained from the broadcast wave received in the non-viewing mode is stored, and the viewing from the non-viewing mode is performed. This is a program related information display method in which program related information stored in the non-viewing mode is displayed at a predetermined timing after shifting to the mode.

  The fourteenth invention is used in a portable digital broadcast receiving apparatus having a viewing mode in which video and audio of a digital broadcast program are output and a non-viewing mode in which output of video and audio of the program is stopped. The digital broadcast receiving apparatus includes a list storage unit that stores a channel list indicating digital broadcast channels that can be received by the tuner, and specifies a channel that can be received by the tuner in the non-viewing mode. Then, the channel list is updated so that the channel list is updated to include the specified channels.

  According to the first aspect, by acquiring the program related information of each broadcasting station during the non-viewing mode, the program related information can be presented to the user at a predetermined timing when returning to the viewing mode. Therefore, the user can easily find a favorite program after returning to the viewing mode by referring to the presented program related information. Since the user does not need to select each channel in the brute force manner in order to search for a favorite program, the user can easily and quickly perform an operation when returning from the non-viewing mode to the viewing mode.

  Further, according to the second aspect, since not all channels that can be received are selected, the process of selecting each channel can be performed quickly.

  Further, according to the third aspect, since the channel list is updated even in the non-viewing mode, the receivable channel can be specified accurately. Therefore, it is possible to prevent channel selection processing from being performed unnecessarily for a channel that cannot be received.

  Further, according to the fourth invention, a receivable channel can be easily specified by using the area identification information.

  In addition, according to the fifth aspect, program related information can be presented to the user at the timing when the non-viewing mode returns to the viewing mode.

  According to the sixth aspect, program related information can be presented at a timing required by the user.

  Further, according to the seventh aspect, since the section is analyzed in the non-viewing mode, the process for returning to the viewing mode is simplified.

  According to the eighth aspect of the invention, since the electronic program information is acquired at the timing when the electronic program information is updated, the same electronic program information can be acquired many times, or the updated electronic program information can be obtained. Electronic program information can be efficiently acquired without being acquired.

  Further, according to the ninth aspect, since it is not necessary to perform the process of analyzing the section in the non-viewing mode, power consumption in the non-viewing mode can be reduced.

  Further, according to the tenth aspect, by specifying the receivable channels in the non-viewing mode, it is possible to maintain an accurate channel list when returning to the viewing mode. Therefore, since the user does not need to reconstruct the channel list when returning to the viewing mode, the operation when returning from the non-viewing mode to the viewing mode is simplified.

  Further, according to the eleventh aspect, since it is determined whether or not all the receivable channels are actually receivable, the receivable channels can be accurately specified.

  According to the twelfth aspect, the receivable channel can be easily specified by using the area identification information.

(First embodiment)
FIG. 1 is a diagram showing a configuration of a portable digital broadcast receiving apparatus according to the first embodiment of the present invention. The portable digital broadcast receiving terminal includes a tuner unit 1, a demodulation unit 2, a transport decoder unit 3, a related information storage unit 4, an audio decoding unit 5, an audio output unit 6, a video decoding unit 7, a section An analysis unit 8, a display unit 9, a mode switching unit 10, and a related information display control unit 11 are provided. The portable digital broadcast receiver shown in FIG. 1 receives a digital broadcast broadcast wave and outputs a digital broadcast program as video and audio.

  Here, the portable digital broadcast receiver according to the first embodiment has a viewing mode and a non-viewing mode. The viewing mode is a mode in which a digital broadcast is received using a tuner and the program is viewed by outputting the digital broadcast program in video, audio, or video and audio. On the other hand, the non-viewing mode is a mode in which a digital broadcast is not received using a tuner. In the non-viewing mode, the broadcast program is not viewed. For example, the power saving mode corresponds to the non-viewing mode. The power saving mode is a mode in which power consumption is reduced by stopping power to a display device (display unit 9), a speaker (audio output unit 6), and the like included in the portable digital broadcast receiving device. In the portable digital broadcast receiver according to the first embodiment, it is assumed that a power saving mode is prepared as a non-viewing mode. The non-viewing mode is not limited to the power saving mode as long as it is a mode in which digital broadcasting is not received using a tuner. For example, when the mobile digital broadcast receiving device has a function as a mobile phone, the mobile digital broadcast receiving device has a mode for editing and sending / receiving e-mails and a mode for making a phone call. It is.

  First, the operation of the mobile digital broadcast receiver in the viewing mode will be described. The tuner unit 1 tunes a designated broadcasting station among 13 to 63 channel broadcasting stations on which digital broadcasting is broadcast, and receives a digital broadcasting wave, for example, an OFDM demodulated broadcasting wave. The demodulator 2 demodulates the broadcast wave (for example, OFDM broadcast wave) received by the tuner unit 1 to construct a transport stream. The transport decoder unit 3 separates the audio stream, the video stream, and the section included in the transport stream constructed by the demodulating unit 2 and constructs each.

  The audio stream constructed by the transport decoder unit 3 is a compressed audio stream typified by MPEG2-AAC and is decoded by the audio decoding unit 5. The decoded sound data is output as audible sound by the sound output unit 6. The video stream constructed by the transport decoder unit 3 is a compressed video stream represented by MPEG2 and the like, decoded by the video decoding unit 7, and output (displayed) as visible information by the display unit 9.

  The section analysis unit 8 receives and analyzes the section constructed by the transport decoder unit 3. The analysis result is an electronic program guide (hereinafter referred to as EPG), which is converted into appropriate video data and then output (displayed) as visible information by the display unit 9.

  The display unit 9 converts the video data obtained from the liquid crystal display and the control unit for driving the video display unit 7 or the section analysis unit 8 into a predetermined format (for example, the NTSC format that can be displayed on the liquid crystal display). It consists of a data format conversion unit to convert. The display unit 9 may include an OSD plane for displaying the video data obtained from the video decoding unit 7 and the video data obtained from the section analysis unit 8 in a superimposed manner.

  As described above, in the viewing mode, the broadcast wave of the digital broadcast is received by the tuner unit 1 and the video and audio of the program included in the broadcast wave received by the tuner unit 1 are output. As a result, the user can view the program. On the other hand, in the power saving mode, viewing of the program is stopped. Hereinafter, the operation in the power saving mode will be described.

  The mode switching unit 10 switches between the viewing mode and the power saving mode on condition that a predetermined mode switching condition is satisfied. As a mode switching condition (power saving mode switching condition) when switching from the viewing mode to the power saving mode, for example, the power saving button of the portable digital broadcast receiving apparatus is operated by the user, or the display unit 9 is visible information Is stopped. In addition, when the portable digital broadcast receiving device has an open / close configuration and does not display a screen in the closed state, the power-saving mode switching condition is that the portable digital broadcast receiving device is in a closed state. Also good. On the other hand, as a mode switching condition (viewing mode switching condition) when switching from the power saving mode to the viewing mode, for example, the return button of the portable digital broadcast receiving device is operated by the user, or the display unit 9 is informed with visible information. Is resumed. Further, when the portable digital broadcast receiving apparatus is of an openable / closable type, the viewing mode switching condition may be that the portable digital broadcast receiving apparatus is in an open state. Note that the mode switching conditions listed here are merely examples, and any method may be used for switching between the viewing mode and the non-viewing mode as long as it is possible to detect whether the digital broadcast is being viewed.

  When the power saving mode switching condition is satisfied in the viewing mode, the mode switching unit 10 temporarily stops the operation for outputting the video and audio of the program. When the demodulator 2, the transport decoder 3, the related information storage 4, the audio decoder 5, the audio output 6, the video decoder 7, the section analyzer 8, and the display 9 are called output units, The switching unit 10 pauses at least part of the operation of the output unit. The mode switching unit 10 controls each unit during the power saving mode. On the other hand, when the viewing mode switching condition is satisfied in the power saving mode, the mode switching unit 10 resumes the operation of the output unit that has been paused.

  The related information storage unit 4 stores program related information obtained from broadcast waves received by the tuner unit 1 in the power saving mode when the viewing mode is shifted to the power saving mode. Here, the program-related information refers to image information related to a program, for example, EPG information of a program or video information of a program. In the first embodiment, the related information storage unit 4 temporarily stores the EPG analyzed by the section analysis unit 8. In another embodiment, the related information storage unit 4 may store the video stream constructed by the transport decoder unit 3 instead of the EPG (second embodiment to be described later). Note that the format for storing the EPG of each broadcasting station is not particularly specified, and if the correspondence between the broadcasting station and the EPG is correctly stored and the EPG of an appropriate broadcasting station can be read as necessary, Any format is acceptable.

  The related information display control unit 11 is a program related information (EPG in the first embodiment) stored in the related information storage unit 4 at a predetermined timing after the transition from the power saving mode to the viewing mode. Information) is displayed (see FIGS. 5 and 10 to be described later). In the first embodiment, the predetermined timing is a timing immediately after the transition from the power saving mode to the viewing mode. That is, in the first embodiment, the EPG is displayed for receivable channels in response to the return from the power saving mode to the viewing mode. Therefore, the user can know the program contents of each channel at the time of returning from the power saving mode to the viewing mode without performing a channel selection operation. Therefore, according to the first embodiment, the user's operation when returning from the power saving mode to the viewing mode can be simplified.

  The portable digital broadcast receiving apparatus may be configured by a computer having a CPU and a memory, and the functions of the respective units may be realized by the CPU executing a predetermined program. For example, some of the components other than the tuner unit 1, the audio output unit 6, and the display unit 9 (including the time determination unit 12, the time storage unit 13, the list storage unit 14, and the list update unit 15 in the embodiment described later) Or all may be implement | achieved by CPU and memory.

  Next, detailed operation of the portable digital broadcast receiving apparatus in the power saving mode will be described. FIG. 2 is a flowchart showing a flow of processing in the power saving mode of the portable digital broadcast receiving apparatus according to the first embodiment. Note that the flowchart shown in FIG. 2 is started when the predetermined power saving mode switching condition is satisfied in the viewing mode.

  In the power saving mode, first, the mode switching unit 10 pauses at least a part of the operation of the output unit (step S1). Specifically, the mode switching unit 10 pauses the operations of the audio decoding unit 5, the audio output unit 6, the video decoding unit 7, and the display unit 9. In the power saving mode, after step S1, the processes of steps S2 to S8 are repeated until the viewing mode switching condition is satisfied. Note that FIG. 2 does not show the return timing from the power saving mode to the viewing mode, but the return to the viewing mode is actually realized by an interrupt, and the process of returning to the viewing mode at any step from S1 to S9. Is executed.

  After step S1, the tuner unit 1 selects channel i (i is an integer from 13 to 63) and receives a broadcast wave of channel i (step S2). Here, the tuner unit 1 selects one channel in one step S2, and selects each channel from channel 13 to channel 63 as channel i in order one by one. Therefore, the tuner unit 1 receives broadcast waves of each channel in a time division manner. Further, in the next step S2 when the channel is selected up to the 63th channel, the 13th channel is selected again, and thereafter the 13th to 63th channels are repeatedly selected in order. In this example, the channels are selected from the 13th channel to the 63rd channel in ascending order, but may be selected in descending order. Further, a channel list indicating channels that can be received by the tuner unit 1 may be prepared, and channel selection may be performed only for the channels indicated in the channel list. If the channel to be selected is determined by an arbitrary method, Good.

  After step S2, the portable digital broadcast receiving apparatus acquires an EPG from the broadcast wave of channel i selected and received in step S2 (step S3). Specifically, after the broadcast wave is demodulated by the demodulating unit 2 and a transport stream is constructed, the transport decoder unit 3 constructs the transport stream by separating it into an audio stream, a video stream, and a section. . Further, the EPG is acquired by the section analysis unit 8 from the constructed section. After step S3, the related information storage unit 4 stores the EPG acquired in step S3 (step S4). The EPG stored in step S4 is stored in association with channel i. Note that the processes in steps S3 and S4 described above are executed when the broadcast wave of channel i can be received in step S2, and the EPG is not stored if the broadcast wave cannot be received. .

  After step S4, the mode switching unit 10 determines whether or not all channels from channel 13 to channel 63 have been selected (step S5). If there is a channel that is not selected as a result of the determination in step S5, the processes in steps S2 to S4 are repeated until all channels are selected. On the other hand, when all channels are selected, the mode switching unit 10 shifts to the power saving mode (step S6). The power saving mode is a mode in which power consumption is further reduced as compared with the power saving mode described above by not receiving digital broadcasting. The power saving mode is also one of the non-viewing modes. In step S6, the mode switching unit 10 pauses the operations of the tuner unit 1, the demodulation unit 2, and the transport decoder unit 3.

  After step S6, the mode switching unit 10 waits for a predetermined time T1 that is set in advance (step S7). The predetermined time T1 is a time during which the power saving mode continues. Following step S7, the mode switching unit 10 switches the mode from the power saving mode to the power saving mode (step S8). Specifically, the mode switching unit 10 restarts the operations of the tuner unit 1, the demodulation unit 2, and the transport decoder unit 3. After step S8, the process returns to step S2.

  FIG. 3 is a diagram illustrating a broadcast wave reception state in the power saving mode. In FIG. 3, it is assumed that the viewing mode has shifted to the power saving mode at the time t1 when viewing the 13th channel. After the time t1, the portable digital broadcast receiving apparatus sequentially selects channels from the 13th channel to the 63rd channel, and acquires EPGs for receivable channels (steps S2 to S4). Then, after tuning to channel 63, the mode shifts to the power saving mode at time t2 (S6). At time t3 when only a predetermined time T1 has elapsed since the transition to the power saving mode, channel 13 is selected again, and thereafter, channels are sequentially selected up to channel 63. Note that the length of time in the power saving mode (predetermined time T1) can be arbitrarily determined. Increasing the power saving mode time improves the power saving efficiency. On the other hand, when the power saving mode time is lengthened, there is a high possibility that the updated EPG will be broadcast during that time. If the EPG is updated and broadcast during the power saving mode, if the mobile phone returns to the viewing mode from the power saving mode, the latest EPG is not acquired by the portable digital broadcast receiver. Become. That is, when returning to the viewing mode, the old EPG may be displayed. A method for solving this problem will be described in detail in the third embodiment.

  Next, the operation of the portable digital broadcast receiving apparatus when returning from the power saving mode (or the most power saving mode) to the viewing mode will be described. FIG. 4 is a flowchart showing a flow of processing when returning from the power saving mode to the viewing mode in the first embodiment. Note that the flowchart shown in FIG. 4 is started when a predetermined viewing mode switching condition is satisfied in the power saving mode.

  In the power saving mode, first, the related information display control unit 11 designates a channel i (i is an integer from 13 to 63) (step S11). Here, the tuner unit 1 selects one channel in one step S11, and selects each channel from the 13th channel to the 63rd channel as a channel i one by one in order. In this example, the channels are selected from the 13th channel to the 63rd channel in ascending order, but may be selected in descending order. In another embodiment, channels that can be received by the tuner unit 1 in the power saving mode may be stored, and channel selection may be performed only for receivable channels. When channel selection is performed only for receivable channels, the processing in step S12 shown below is unnecessary.

  Following step S11, the related information display control unit 11 determines whether or not the EPG for the channel i designated in step S11 is stored in the related information storage unit 4 (step S12). If the EPG for channel i is stored in the determination in step S12, the related information display control unit 11 determines the display position and the size of the display area of the EPG for channel i (step S13). Here, the EPG of the channel received immediately before shifting to the power saving mode is relatively large in the upper left portion of the screen of the display unit 9. In addition, the EPGs of the other channels are arranged relatively small in the right part or the lower part of the screen (see FIG. 5 described later). Note that any method may be used for determining the display position and the size of the display area. On the other hand, if the EPG for channel i is not stored in the determination at step S12, the process at step S13 is skipped and the process at step S14 is performed.

  If the determination in step S12 is negative, or after step S13, the related information display control unit 11 determines whether or not all receivable channels (channels 13 to 63) have been designated (step S13). S14). If there is a channel that is not specified as a result of the determination in step S14, the processes in steps S11 to S13 are repeated until all the channels are specified. On the other hand, when all the channels are designated, the mode switching unit 10 returns the operation of the display unit 9 (step S15). Next, the related information display control unit 11 causes the display unit 9 to display the EPG of each channel stored in the related information storage unit 4 at the display position and size determined in step S13 (step S16).

  FIG. 5 is a diagram illustrating an example in which program-related information is displayed on the portable digital broadcast receiver according to the first embodiment. In FIG. 5, the EPG information 21 of the broadcasting station that was viewed immediately before shifting to the power saving mode is displayed on the display unit 9 of the portable digital broadcast receiving apparatus in the upper left part. On the right side and the lower side of the EPG information 21, EPG information 22 to 26 of other broadcasting stations from which EPG information can be acquired are displayed so as to surround the EPG information 21. The

  Although FIG. 4 does not show the processing after step S16, after step S16, the mobile digital broadcast receiving apparatus accepts a channel selection operation by the user and selects one of the channels on which the EPG is displayed. Wait for one channel to be selected by the user. When the channel is selected by the user, the tuner unit 1 starts to receive the broadcast wave of the selected channel, and the operation of each unit that has been suspended in the power saving mode is resumed. That is, the mode switching unit 10 resumes the operations of the audio decoding unit 5, the audio output unit 6, and the video decoding unit 7 that have been suspended in step S1. As a result, viewing of the program can be started.

  As described above, according to the first embodiment, the EPG acquired during the power saving mode is automatically displayed in response to the return from the power saving mode to the viewing mode (see FIG. 5). . Therefore, since the user can select a favorite program with reference to the displayed EPG, it is not necessary to search for a favorite program by selecting each channel in a brute force manner. It can be carried out.

  In FIG. 2, all channels from channel 13 to channel 63 are selected and then the mode is shifted to the power saving mode. However, every time one channel is selected, the mode is shifted to the power saving mode. You may make it do. FIG. 6 is a flowchart showing a flow of processing in the power saving mode in the modification of the first embodiment. Note that steps that perform the same processing as the steps in FIG. 2 are given the same step numbers as in FIG. As shown in FIG. 6, in this modification, after acquiring the EPG of one channel, the mode shifts to the power saving mode (step S6). Then, it waits for a predetermined time T2 (step S7), and returns to the power saving mode (step S8). FIG. 7 is a diagram showing a broadcast wave reception state in the power saving mode when the processing shown in FIG. 6 is performed. As shown in FIG. 7, in this modification, the time from when the EPG is acquired for one channel until the EPG is acquired for the next channel is a predetermined time T2.

  In the first embodiment, in the power saving mode, the section obtained from the transport decoder unit 3 is analyzed by the section analysis unit 8, and the analyzed EPG is stored in the related information storage unit 4. Here, in another embodiment, the section is stored in the related information storage unit 4 without being analyzed by the section analysis unit 8 during the power saving mode, and when returning from the power saving mode to the viewing mode, The section stored in the related information storage unit 4 may be analyzed by the section analysis unit 8. This also makes it possible to display the EPG when returning from the power saving mode to the viewing mode. Further, since it is not necessary to operate the section analysis unit 8 in the power saving mode, the power consumption can be further reduced by pausing the section analysis unit 8 in the power saving mode.

(Second Embodiment)
A portable digital broadcast receiver according to the second embodiment of the present invention will be described below. The second embodiment differs from the first embodiment described above in that the program related information is a video stream. The configuration of the portable digital broadcast receiving apparatus according to the second embodiment is the same as that shown in FIG.

  FIG. 8 is a flowchart showing the flow of processing in the power saving mode of the portable digital broadcast receiver according to the second embodiment. Note that the flowchart shown in FIG. 8 is started when the power saving mode switching condition is satisfied in the viewing mode, as in the first embodiment. Further, in FIG. 8, steps that perform the same processing as in the first embodiment are denoted by the same step numbers as in FIG. 2, and detailed description thereof is omitted.

  In the second embodiment, when the broadcast wave of channel i is received in step S2, the process of step S21 is performed. That is, the portable digital broadcast receiving apparatus acquires a video stream from the broadcast wave of channel i selected and received in step S2 (step S21). Specifically, after the broadcast wave is demodulated by the demodulating unit 2 and a transport stream is constructed, the transport decoder unit 3 constructs the transport stream by separating it into an audio stream, a video stream, and a section. . Thereby, a video stream can be obtained. After step S21, the related information storage unit 4 stores the video stream acquired in step S21 (step S22). In step S22, a video stream having a predetermined amount of data for a predetermined time is stored. The predetermined time may be any length, for example, a still image for one frame may be stored. Further, the video stream stored in step S22 is stored in association with channel i. Note that the processes in steps S21 and S22 described above are executed when the broadcast wave of channel i can be received in step S2, and the video stream is stored if the broadcast wave cannot be received. Not. Processes in steps S6 to S8 after step S22 are the same as those in the first embodiment.

  FIG. 9 is a flowchart showing a flow of processing when returning from the power saving mode to the viewing mode in the second embodiment. Note that the flowchart shown in FIG. 9 is started when the viewing mode switching condition is satisfied in the power saving mode, as in the first embodiment. Also, in FIG. 9, steps that perform the same processing as in the first embodiment are denoted by the same step numbers as in FIG. 4, and detailed description thereof is omitted.

  In the second embodiment, after step S11, the related information display control unit 11 determines whether a video stream is stored in the related information storage unit 4 for the channel i specified in step S11 (step S25). ). When the video stream for channel i is stored in the determination in step S25, the related information display control unit 11 determines the display position of the video stream and the size of the display area for channel i (step S26). The method for determining the size of the display position and the display area may be the same method as in step S13 of the first embodiment. On the other hand, if the video stream for channel i is not stored in the determination at step S25, the process at step S26 is skipped and the process at step S14 is performed. The process in step S14 is the same as that in the first embodiment.

  In the second embodiment, when it is determined in step S14 that all channels have been designated, the mode switching unit 10 returns the operations of the video decoding unit 7 and the display unit 9 (step S27). In the second embodiment, since the target to be displayed after returning to the viewing mode is a video stream, the operation of the video decoding unit 7 is started in addition to the display unit 9. Next, the related information display control unit 11 causes the video decoding unit 7 to decode the video stream of each channel stored in the related information storage unit 4, and then displays each video stream at the display position and size determined in S26. Is displayed on the display unit 9 (step S28). At this time, if the video decoding unit 7 cannot process a plurality of video streams at a time, it is processed in a time division manner for each broadcasting station. The operation after the video stream is displayed is the same as that in the first embodiment.

  FIG. 10 is a diagram illustrating an example in which program-related information is displayed on the portable digital broadcast receiver according to the second embodiment. In FIG. 10, the video stream of each channel that could be received during the power saving mode is displayed on the display unit of the portable digital broadcast receiver. Note that the display position and size of the video stream of each channel are the same as in the first embodiment.

  As shown in the above second embodiment, the program-related information displayed when returning from the power saving mode to the viewing mode may be a video stream of a program. Also in the second embodiment, as in the first embodiment, the user can select a favorite program with reference to the displayed video stream, so that the user can easily and quickly select a channel.

  In the second embodiment, the storage area of the related information storage unit 4 is a ring buffer, and when the video stream to be recorded exceeds the capacity of the storage area, the old data is discarded and stored. Also good. This makes it possible to display the latest video stream when returning from the power saving mode to the viewing mode.

(Third embodiment)
Hereinafter, a portable information terminal according to the third embodiment of the present invention will be described. Note that the third embodiment differs from the first embodiment described above in that the timing (time) at which the broadcast wave is received for the second and subsequent times for each channel in the power saving mode is the contents of the EPG acquired earlier. It is a point to decide based on.

  FIG. 11 is a diagram showing a configuration of a portable digital broadcast receiving apparatus according to the third embodiment. The configuration shown in FIG. 11 is the same as the configuration shown in FIG. 1 except that the time determination unit 12 and the time storage unit 13 are further provided. Therefore, the same components as those shown in FIG. Reference numerals are assigned and detailed description is omitted. The time determination unit 12 determines the time at which the tuner unit 1 should next receive the broadcast wave of the channel based on the content of the EPG of a certain channel stored in the related information storage unit 4 in the power saving mode. . The time storage unit 13 stores the time determined by the time determination unit 12 in association with the corresponding channel.

  Next, processing in the power saving mode in the third embodiment will be described. FIG. 12 is a flowchart showing the flow of processing in the power saving mode of the portable digital broadcast receiving apparatus according to the third embodiment. Note that the flowchart shown in FIG. 12 is started when the power saving mode switching condition is satisfied in the viewing mode, as in the first embodiment. Also, in FIG. 12, steps that perform the same processing as in the first embodiment are denoted by the same step numbers as in FIG. 2, and detailed description thereof is omitted.

  In the third embodiment, after step S4, the time determination unit 12 determines the time (update time) ti for the next update of the EPG of channel i based on the EPG stored in step S4 ( Step S31). Specifically, the time determination unit 12 acquires the end time of the currently broadcast program by analyzing the content of the EPG stored in step S32. The acquired end time becomes the start time of the next program, that is, the update time ti. The update time ti is stored in the time storage unit 13 in association with the corresponding channel i. As a result, when the determination in step S5 becomes affirmative, the time when the EPG should be updated next is calculated for the channel that can receive the broadcast wave.

  In the third embodiment, after step S6, the mode switching unit 10 waits until the latest update time (step S32). Here, the latest update time is an update time closest to the current time among the update times stored in the time storage unit 13. In the third embodiment, when the current time becomes the latest update time, the process of step S7 is performed, and the process returns from the power saving mode to the power saving mode (step S8).

  After step S8, the tuner unit 1 selects a channel (channel j, where j is an integer from 13 to 63) whose current time is the update time, and receives the broadcast wave of channel j. (Step S33). Next, the portable digital broadcast receiving apparatus acquires an EPG from the broadcast wave of channel j selected and received in step S33 (step S34). The EPG acquisition method is the same as that in step S3 described above. Following step S34, the related information storage unit 4 stores the EPG acquired in step S34 (step S35). Following step S35, the time determination unit 12 determines a time (update time) tj for updating the EPG of channel j next based on the EPG stored in step S35 (step S36). The method for determining the update time in step S36 is the same as in step S31 described above. When the update time tj is determined in step S36, the update time of channel j stored in the time storage unit 13 is updated to tj. Thereby, the update time can be determined based on the latest EPG. Thereafter, the latest EPG can be acquired by repeating the processes of steps S6 to S35.

  When the broadcast wave of channel j cannot be received in step S33, the time determination unit 12 may delete the update time of channel j from the time storage unit 13. In this case, since there is a possibility that the broadcast area has changed, it is possible to return to step S2 and reselect all the receivable channels.

  FIG. 13 is a diagram illustrating a broadcast wave reception state in the power saving mode according to the third embodiment. In FIG. 13, it is assumed that the viewing mode has shifted to the power saving mode at the time t1 when viewing the 13th channel. After the time t1, the portable digital broadcast receiving apparatus tunes in order from the 13th channel to the 63rd channel, and acquires EPG for receivable channels (steps S2 to S5). As a result, the time at which the EPG should be updated next is calculated for the channel that can receive the broadcast wave. As a result, in FIG. 13, it is assumed that the latest update time is t14 (corresponding to 14 channels). Therefore, the portable digital broadcast receiving apparatus acquires EPG for 14 channels at time t14 (step S34). Further, a new update time (denoted as t14 'in FIG. 13) is determined for the 14 channels (step S36). Thereafter, every time the current time becomes the latest update time, the portable digital broadcast receiving apparatus repeats the process of acquiring the EPG of the channel corresponding to the latest update time. The process when shifting from the power saving mode to the viewing mode is the same as that in the first embodiment.

  As described above, according to the third embodiment, since the EPG acquisition process is performed when necessary, it is possible to efficiently switch to the power saving mode. Therefore, it is possible to prevent the EPG from being erroneously displayed by always obtaining the latest EPG while improving the power saving efficiency by making the time of the power saving mode as long as possible.

  In addition to the currently broadcasted programs, there are cases where a plurality of programs scheduled to be broadcast in the EPG are recorded in the order of broadcast. In such a case, the end time of each program may be stored as the update time. Furthermore, in this case, the update time before the current time may be deleted.

(Fourth embodiment)
Hereinafter, a portable information terminal according to the fourth embodiment of the present invention will be described. The fourth embodiment aims to maintain a correct channel list when returning from the power saving mode to the viewing mode.

  FIG. 14 is a diagram showing a configuration of a portable digital broadcast receiving apparatus according to the fourth embodiment. The configuration shown in FIG. 14 is the same as the configuration shown in FIG. 1 except that it further includes a list storage unit 14 and a list update unit 15. Therefore, the same components as those shown in FIG. Reference numerals are assigned and detailed description is omitted. The list storage unit 14 stores a channel list indicating digital broadcast channels that can be received by the tuner unit 1. The list update unit 15 identifies channels that can be received by the tuner unit 1 in the power saving mode. Further, the channel list is updated so as to be configured with the specified channels. Note that, in the fourth embodiment, as in the second and third embodiments, the process for viewing a program in the viewing mode is the same as that in the first embodiment.

  Next, processing in the power saving mode of the portable digital broadcast receiving apparatus in the fourth embodiment will be described. FIG. 15 is a flowchart showing the flow of processing in the power saving mode of the portable digital broadcast receiving apparatus according to the fourth embodiment. Note that the flowchart shown in FIG. 15 is started when the power saving mode switching condition is satisfied in the viewing mode, as in the first embodiment. In FIG. 15, steps that perform the same processing as in the first embodiment are denoted by the same step numbers as in FIG. 2, and detailed description thereof is omitted.

  In the fourth embodiment, first, the list storage unit 14 stores the area identification information of the channel received in the immediately preceding viewing mode (step S41). The area identification information is information included in the broadcast wave and is information that can identify the area where the broadcast is performed. Using this area identification information, it is possible to detect that the user has moved from one broadcast area to another broadcast area.

  In the fourth embodiment, the process of step S42 is performed instead of the process of step S2. In step S <b> 42, the tuner unit 1 selects one channel i from the channels indicated by the channel list stored in the list storage unit 14. Here, the channel i is selected one by one from the channels in the channel list in order, and one channel is selected in one step S42. That is, the tuner unit 1 selects a channel in the channel list in a time division manner.

  Following step S4, the portable digital broadcast receiving apparatus acquires area identification information (step S43). Specifically, the area analysis information can be acquired by the section analysis unit 8 analyzing the section constructed by the transport decoder unit 3 in step S3.

  Following step S43, the list update unit 15 determines whether or not the broadcast area has changed (step S44). This determination can be performed using the area identification information acquired in step S43. That is, the area indicated by the area identification information stored in step S41 is compared with the area indicated by the area identification information acquired in step S43. If both are the same, it is determined that the broadcast area has not changed. be able to. Conversely, if both are different, it can be determined that the broadcast area has not changed. Even if they are different, if it can be determined that the broadcast area has not changed (for example, “Osaka” and “Kinki”), it is determined that the broadcast area has not changed. May be.

  If it is determined in step S44 that the broadcast area has changed, the list update unit 15 updates the contents of the channel list stored in the list storage unit 14 (step S45). Here, in the portable digital broadcast receiver, it is assumed that the correspondence between the broadcast area and the channel list indicating the channels that can be received in the broadcast area is prepared in advance. Therefore, in step S45, the list update unit 15 updates the content stored in the list storage unit 14 to the content of the channel list corresponding to the changed broadcast area. That is, in the fourth embodiment, the contents of the channel list are updated assuming that “the channel included in the channel list corresponding to the broadcast area after the change is a channel that can be received at that time”.

  When the channel list is updated by the list updating unit 15, one channel is selected from the channels included in the updated channel list in subsequent step S42. In step S45, the contents of the area identification information stored in step S41 are updated to the contents of the area identification information acquired in the immediately preceding step S43.

  On the other hand, if it is determined in step S44 that the broadcast area has not changed (that is, if the determination is negative), the process in step S45 is skipped. If the determination in step S44 is negative, or after step S45, the process of step S5 is performed. The processes after step S5 are the same as those in the first embodiment.

  According to the fourth embodiment described above, even if the broadcast area changes during the power saving mode, the change can be detected by acquiring the area identification information during the power saving mode. Therefore, the portable digital broadcast receiving apparatus can maintain an appropriate channel list even if the broadcast area changes during the power saving mode. Therefore, it is not necessary to construct a correct channel list when shifting from the power saving mode to the viewing mode. Note that, in the fourth embodiment, the processing when shifting from the power saving mode to the viewing mode is the same as in the first embodiment.

  In the fourth embodiment, the channel list only needs to match the actual broadcast area when shifting from the power saving mode to the viewing mode, and the program related information is displayed when the viewing mode is restored. It does not have to be displayed. That is, the mobile digital broadcast receiver according to the fourth embodiment may be configured not to include the related information display control unit 11 and may not execute steps S3 and S4 in FIG. Even when the program-related information is not displayed when returning to the viewing mode, the channel list is updated when returning to the viewing mode, thereby providing the following advantages, for example. That is, when the portable digital broadcast receiver has a button for performing processing for selecting the previous channel or selecting the next channel, an appropriate channel list is created when the viewing mode is restored. This process can be performed correctly. The process of selecting the previous channel is a process of selecting the channel immediately before the currently selected channel among the channels in the channel list. Further, the process of selecting the next channel is a process of selecting the channel immediately after the currently selected channel among the channels in the channel list.

  In the fourth embodiment, the list updating unit 15 determines channels that can be received by the tuner unit 1 using the area identification information included in the broadcast wave. Here, in another embodiment, the list update unit 15 can receive broadcast waves of each channel by causing the tuner unit 1 to actually select all channels (13 to 63 channels) that can be received. It may be determined whether or not there is. Specifically, in step S42 shown in FIG. 15, the tuner unit 1 selects all the receivable channels (channels 13 to 63). When the step S5 shown in FIG. 15 is completed, the list update unit 15 sets a channel list constituted by channels (that is, receivable channels) from which the EPG has been acquired as a new channel list. At this time, it is not necessary to execute the processing of steps S43 to S45 shown in FIG.

  As described above, according to the first to fourth embodiments, by receiving the broadcast by the tuner unit 1 even during the power saving mode, the EPG or the like is displayed when the viewing mode is returned from the power saving mode, It is possible to maintain the channel list with appropriate contents. Therefore, the user's operation when returning from the non-viewing mode to the viewing mode can be simplified.

  In the first to fourth embodiments, the program related information is displayed at the timing immediately after returning from the power saving mode to the viewing mode. Here, in another embodiment, program related information may be displayed in response to the user performing a channel selection operation after returning from the power saving mode to the viewing mode. Specifically, when the program returns from the power saving mode to the viewing mode, the program of the channel that was viewed immediately before the transition to the power saving mode is output. Then, the execution of the process shown in FIG. 4 is started with the user performing a channel selection operation while viewing the program.

  In the first to fourth embodiments, the case where the non-viewing mode is the power saving mode has been described as an example. However, the non-viewing mode is not limited thereto. For example, when the portable digital broadcast receiving apparatus has a function for editing and transmitting / receiving mail, the non-viewing mode may be a mode (mail mode) for editing and transmitting / receiving electronic mail. This is because it is conceivable that the portable digital broadcast receiving apparatus receives an electronic mail during the viewing mode. When the non-viewing mode is the mail mode, the condition for shifting from the viewing mode to the mail mode is, for example, that a mail has been received. In this case, the condition for shifting from the mail mode to the viewing mode is, for example, that the user has operated a button for returning to the viewing mode.

  When the portable digital broadcast receiving apparatus has a telephone function, the non-viewing mode may be a mode for making a call (call mode). When the non-viewing mode is the call mode, when the viewing is resumed even in a situation where the viewing is interrupted because the call is received while the program is being watched and the viewing is resumed after hanging up. Program related information can be displayed on the screen. The condition for shifting from the viewing mode to the call mode is, for example, that a call has been received. Further, the condition for shifting from the call mode to the viewing mode is, for example, that the telephone is hung up. Note that, when the display unit 9 and the audio output unit 6 need to be operated even in the non-viewing mode as in the mail mode and the call mode, the process of step S1 in FIG. 2 may not be executed. Alternatively, only necessary components may be operated.

  In addition to the above, the non-viewing mode may be, for example, a mode (charging mode) in which the portable digital broadcast receiving device is charged with a charger. The condition for shifting from the viewing mode to the charging mode is, for example, that the portable digital broadcast receiving device is attached to the charger. In addition, the condition for shifting from the charging mode to the viewing mode is, for example, that the portable digital broadcast receiving device is removed from the charger.

  As described above, the digital broadcast receiving apparatus according to the present invention is useful because it can be used for the purpose of simplifying user operations when returning from the non-viewing mode to the viewing mode.

The figure which shows the structure of the portable digital broadcast receiver which concerns on 1st Embodiment. The flowchart which shows the flow of a process in the power saving mode of the portable digital broadcast receiver in 1st Embodiment. The figure which shows the reception situation of the broadcast wave at the time of power saving mode The flowchart which shows the flow of a process at the time of returning from power saving mode to viewing-and-listening mode in 1st Embodiment. The figure which shows an example by which the program relevant information was displayed on the portable digital broadcast receiver which concerns on 1st Embodiment The flowchart which shows the flow of a process of the power saving mode in the modification of 1st Embodiment. The figure which shows the reception condition of the broadcast wave at the time of the power saving mode in the case of performing the process shown in FIG. The flowchart which shows the flow of a process in the power saving mode of the portable digital broadcast receiver which concerns on 2nd Embodiment. The flowchart which shows the flow of a process at the time of returning from power saving mode to viewing-and-listening mode in 2nd Embodiment. The figure which shows an example by which the program relevant information was displayed on the portable digital broadcast receiver which concerns on 2nd Embodiment The figure which shows the structure of the portable digital broadcast receiver which concerns on 3rd Embodiment. The flowchart which shows the flow of a process in the power saving mode of the portable digital broadcast receiver which concerns on 3rd Embodiment. The figure which shows the reception condition of the broadcast wave at the time of power saving mode in 3rd Embodiment The figure which shows the structure of the portable digital broadcast receiver which concerns on 4th Embodiment The flowchart which shows the flow of a process in the power saving mode of the portable digital broadcast receiver which concerns on 4th Embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tuner part 2 Demodulator part 3 Transport decoder part 4 Memory | storage part 5 Audio | voice decoding part 6 Audio | voice output part 7 Video | video decoding part 8 Section analysis part 9 Display part 10 Mode switching part 11 Related information display control part 12 Time determination part 13 Time storage Unit 14 List storage unit 15 List update unit

Claims (14)

A tuner for receiving broadcast waves of digital broadcasting;
An output unit for outputting video and audio of a program included in the broadcast wave received by the tuner unit;
A mode switching unit that switches between a viewing mode in which video and audio of the program are output and a non-viewing mode in which output of video and audio of the program is stopped;
A related information storage unit that stores program related information obtained from a broadcast wave received by the tuner unit in the non-viewing mode when the viewing mode is shifted to the non-viewing mode;
And a related information display control unit that displays the program related information stored in the related information storage unit at the predetermined timing after the transition from the non-viewing mode to the viewing mode. Digital broadcast receiver. A list storage unit that stores a channel list indicating channels that can be received by the tuner unit;
The digital broadcast receiving apparatus according to claim 1, wherein the tuner unit receives broadcast waves of each channel included in the channel list in a time division manner in the non-viewing mode. In the non-viewing mode, the tuner further includes a list update unit that identifies a channel that can be received and updates the channel list so that the channel is configured by the identified channel.
3. The digital broadcast receiving apparatus according to claim 2, wherein the tuner unit receives broadcast waves of each channel included in the updated channel list in a time division manner when the channel list is updated by the list update unit. The broadcast wave received by the tuner unit includes area identification information,
The list update unit specifies a channel that can be received by the tuner unit based on region identification information included in a broadcast wave received by the tuner unit in the non-viewing mode. The digital broadcast receiving apparatus as described.   The related information display control unit causes the display device to display program related information stored in the related information storage unit at the timing immediately after the transition from the non-viewing mode to the viewing mode. Item 2. The digital broadcast receiver according to Item 1.   The related information display control unit causes the display device to display program related information stored in the related information storage unit in the non-viewing mode at a timing when a user selects a channel in the viewing mode. The digital broadcast receiver according to 1. The related information storage unit stores electronic program information acquired by analyzing a section included in a broadcast wave received by the tuner unit as the program related information,
The digital broadcast receiving device according to claim 1, wherein the related information display control unit causes the display device to display electronic program information stored in the related information storage unit. The electronic program information includes at least information indicating the end time of the program,
In the non-viewing mode, the digital broadcast receiving apparatus is based on information indicating an end time of a program included in the latest electronic program information regarding a predetermined channel among the electronic program information stored in the related information storage unit. The digital broadcast receiving apparatus according to claim 7, further comprising a time determining unit that determines a time at which the tuner unit should next receive a broadcast wave of the predetermined channel. The related information storage unit stores a section included in a broadcast wave received by the tuner unit,
The digital broadcast receiving device according to claim 1, wherein the related information display control unit causes the display device to display electronic program information obtained by analyzing a section stored in the related information storage unit. A tuner for receiving broadcast waves of digital broadcasting;
An output unit for outputting video and audio of a program included in the broadcast wave received by the tuner unit;
A list storage unit for storing a channel list indicating channels of digital broadcasting receivable by the tuner unit;
A mode switching unit for switching between a viewing mode in which audio and video of the program are output and a non-viewing mode in which output of audio and video of the program is stopped;
In the non-viewing mode, a portable digital broadcast receiving apparatus further comprising a list updating unit that specifies a channel that can be received by the tuner unit and updates the channel list so that the channel is configured by the specified channel.   The digital broadcast receiving apparatus according to claim 10, wherein the list updating unit identifies a channel that can be received by the tuner unit by detecting whether or not all the channels that can be received are receivable. The broadcast wave received by the tuner unit includes area identification information,
The list update unit specifies a channel receivable by the tuner unit based on area identification information included in a broadcast wave received by the tuner unit in the non-viewing mode. The digital broadcast receiving apparatus as described. A method used in a portable digital broadcast receiver having a viewing mode in which video and audio of a digital broadcast program are output and a non-viewing mode in which output of video and audio of the program is stopped,
When transitioning from the viewing mode to the non-viewing mode, receiving a broadcast wave of digital broadcasting,
Storing program related information obtained from broadcast waves received in the non-viewing mode;
A display method of program related information, wherein the stored program related information is displayed at a predetermined timing after the transition from the non-viewing mode to the viewing mode. A method used in a portable digital broadcast receiver having a viewing mode in which video and audio of a digital broadcast program are output and a non-viewing mode in which output of video and audio of the program is stopped,
The digital broadcast receiving apparatus includes a list storage unit that stores a channel list indicating channels of digital broadcast that can be received,
In the non-viewing mode, specify the receivable channel,
A channel list update method, wherein the channel list is updated so as to be configured by the specified channels.

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