JP2009017088A - Broadcast receiving method, broadcast receiving system, personal computer and broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a broadcast receiving method ensuring visibility of text information of emergency broadcast, and also to provide a broadcast receiving system, a personal computer and a broadcast receiver. <P>SOLUTION: This broadcast receiving method has a configuration in which a tuner module for receiving digital mode broadcast is externally mounted on an image display device, and if emergency broadcast occurs during digital broadcast reception in one-segment broadcast, the emergency broadcast is detected, and the reception is switched to reception of multi-segment broadcast or switched to a magnified display of only text information included in the emergency broadcast. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a broadcast receiving method capable of receiving a digital broadcast, a broadcast receiving system, a personal computer, and a broadcast receiving apparatus (tuner module).

  In recent years, since advanced AV [Audio Visual] functions are installed in personal computers, it is possible to view broadcast program content on a display by connecting a tuner module for receiving TV broadcasts. In addition, broadcast program content can be recorded on a recording medium such as an HDD (hard disk drive).

  Also, TV broadcasts are shifting from analog broadcasts to digital broadcasts, and digital broadcast reception models are beginning to be put into practical use for tuner modules that are connected to personal computers.

  In Japanese terrestrial digital broadcasting, one channel is divided into 13 “segments”, and several of these are bundled to transmit video, data, audio, and the like. For example, a high-definition broadcast requires 12 segments, but a standard-definition broadcast requires only 4 segments, so three different programs can be broadcast simultaneously on one channel.

  In high-definition broadcasting of digital terrestrial broadcasting, MPEG [Moving Picture Expert Group] -2 is adopted as the video coding standard, and AAC [Advanced Audio Coding] is adopted as the audio coding standard. Has been. In addition, data broadcasting is also multiplexed in high-definition broadcasting.

  Broadcasting using one of the above segments is one segment broadcasting (so-called one-segment broadcasting). In 1-segment broadcasting, the bandwidth is as narrow as 1/4 of normal broadcasting, so only low-resolution images of QVGA [Quarter Video Graphics Array] (320 × 240 pixels) size can be transmitted, but compared to high-definition broadcasting using 12 segments. It is characterized by being easily received by a mobile body such as a mobile phone.

  In the one-segment broadcasting, the simulcast that mainly plays the same program as the normal terrestrial broadcast is mainly performed. In 1-segment broadcasting, H.264 is used as a video encoding standard. H.264 (MPEG-4 AVC [Advanced Video Coding]) is adopted, and the above-mentioned AAC is adopted as an audio coding standard. In addition, data broadcasting is multiplexed in one segment broadcasting.

  The external tuner modules for personal computers are mainly one-segment broadcasting tuner modules. However, in the future, external tuner modules for 4-segment broadcasting and 12-segment broadcasting will also be put into practical use. it is conceivable that.

As related arts related to the above, for example, the received digital broadcast signal is selected, demodulated, code error corrected to generate broadcast program content, encrypted and transmitted to a personal computer, and multiplexed to the digital broadcast signal. A digital broadcast receiving apparatus including a tuner module that performs mutual authentication with a personal computer using the authentication parameters that have been described is disclosed (see Patent Document 1).
JP 2006-74666 A

  However, in the digital broadcast receiving apparatus, when an emergency broadcast is received in a state where a one-segment broadcast is received (or in a state where video is displayed in a narrow area of the display), the emergency broadcast is received. In some cases, the visibility of broadcast text information and the like is not sufficient. In other words, when one-segment broadcasting is being received, the image quality is not sufficient, so the visibility of text information and the like broadcast in emergency broadcasting may not be sufficient, and the video may be displayed in a narrow area of the display. In the displayed state, since the displayed character information is small, there is a case where the visibility of the character information or the like broadcast in the emergency broadcast is not sufficient.

  That is, when an emergency broadcast occurs during reception of a one-segment broadcast, the display area of the screen is narrow in the one-segment broadcast, so it is difficult to notice the occurrence of emergency information itself, and when confirming the content of the emergency broadcast itself Compared with 12-segment broadcasting, the information is expected to be very small.

  The present invention has been made in view of the above problems, and provides a broadcast receiving method, a broadcast receiving system, a personal computer, and a broadcast receiving apparatus capable of ensuring the visibility of text information and the like of emergency broadcasts. The purpose is to do.

  In order to achieve the above object, a broadcast receiving method according to the present invention provides an emergency broadcast when a digital broadcast is received as a one-segment broadcast by externally attaching a tuner module for receiving a digital broadcast to an image display device. When this occurs, it is detected and switched to reception of a multi-segment broadcast, or only text information included in the emergency broadcast is extracted and displayed in an enlarged manner (first configuration).

  In the broadcast receiving method having the first configuration, the multi-segment broadcast may be a 4-segment standard-definition broadcast or a 12-segment high-definition broadcast (second configuration).

  In the broadcast receiving method having the first or second configuration, the image display device may be a personal computer including a display (third configuration).

  The broadcast receiving system according to the present invention can be connected to a tuner module that receives a digital broadcast and the tuner module, and a digital broadcast signal is input from the tuner module. An image display device capable of viewing a digital broadcast, and when an emergency broadcast occurs when a digital broadcast is received as a one-segment broadcast, this is detected and switched to the reception of a multi-segment broadcast, or the emergency broadcast Only the character information included in the broadcast is extracted and the enlarged display is performed (fourth configuration).

  In the broadcast receiving system having the fourth configuration, the multi-segment broadcast may be a 4-segment standard-definition broadcast or a 12-segment high-quality broadcast (fifth configuration).

  In the broadcast receiving system having the fourth or fifth configuration, the image display device may be a personal computer including a display (sixth configuration).

  The personal computer according to the present invention has a tuner module for receiving a digital broadcast, and detects an emergency broadcast when a digital broadcast is received as a one-segment broadcast. Switching to reception is performed, or only character information included in the emergency broadcast is extracted and displayed in an enlarged manner (seventh configuration).

  In the personal computer having the seventh configuration, the multi-segment broadcast may be a 4-segment standard-definition broadcast or a 12-segment high-quality broadcast (eighth configuration).

  The broadcast receiving apparatus according to the present invention is a broadcast receiving apparatus that is communicably connected to a personal computer equipped with a monitor, receives a digital television broadcast, and outputs it to the monitor. Receiving means for selecting and receiving one of the multi-segment broadcasts, broadcast determining means for determining whether there is an emergency broadcast that can be received via the receiving means, and emergency broadcast receivable by the broadcast determining means When it is determined that there is a reception unit, the reception unit is configured to have a reception form changing unit that receives a multi-segment broadcast (the ninth configuration).

  In the broadcast receiving apparatus having the ninth configuration, the multi-segment broadcast may be a 4-segment standard-definition broadcast or a 12-segment high-definition-quality broadcast (tenth configuration).

  In the broadcast receiving apparatus having the tenth configuration, the broadcast determining means determines whether there is an emergency broadcast that can be received based on TMCC (Transmission and Multiplexing Configuration Control) (eleventh configuration). ).

  The broadcast receiving apparatus having any one of the ninth to eleventh configurations receives a predetermined area preset in the monitor when it is determined by the broadcast determining means that there is an emergency broadcast that can be received. It is preferable to have a configuration (a twelfth configuration) including video display control means for outputting instruction information to the personal computer to display the recorded video.

  The broadcast receiving device having any one of the ninth to twelfth configurations is a channel having a frequency band in which an emergency broadcast that can be received is present when the broadcast determination unit determines that there is an emergency broadcast that can be received. It is preferable to adopt a configuration (a thirteenth configuration) including channel specifying means for specifying.

  In the broadcast receiving apparatus having the thirteenth configuration, the channel specifying means specifies a channel on which an emergency broadcast that can be received is broadcast based on a PMT [Program Map Table] received by the receiving means. A configuration (fourteenth configuration) is preferable.

  The broadcast receiving apparatus having the thirteenth or fourteenth configuration may be configured to include channel setting means (fifteenth configuration) that causes the receiving means to set the channel specified by the channel specifying means. .

  In addition, the broadcast receiving device having any one of the ninth to fifteenth configurations, when it is determined that there is an emergency broadcast that can be received by the broadcast determination means, the characters included in the emergency broadcast via the reception means Character acquisition means for acquiring information, and character information acquired by the character acquisition means for the personal computer to display on the monitor in a predetermined area with a predetermined character size And a character display control means for outputting the instruction information (a sixteenth configuration).

  Alternatively, a broadcast receiving apparatus according to the present invention is a broadcast receiving apparatus that is communicably connected to a personal computer equipped with a monitor, receives a digital television broadcast, and outputs it to the monitor. Receiving means for selecting and receiving one of the multi-segment broadcasts, broadcast determining means for determining whether there is an emergency broadcast that can be received via the receiving means, and emergency broadcast receivable by the broadcast determining means When it is determined that there is a character acquisition unit that acquires character information included in the emergency broadcast via the reception unit, and the character information acquired by the character acquisition unit is preset in the monitor Character display control means for outputting instruction information to the personal computer to display in a predetermined area in a predetermined character size; It has a configuration comprising (Configuration 17).

  In the broadcast receiving apparatus having the seventeenth configuration, the character acquisition means includes character information included in the emergency broadcast via the reception means only when a one-segment broadcast is received by the reception means. (18th configuration).

  According to the broadcast receiving method, the broadcast receiving system, and the personal computer according to the present invention, when an emergency broadcast occurs when a digital broadcast is received as a one-segment broadcast, this is detected and switched to the reception of a plurality of segment broadcasts. Alternatively, since only the character information included in the emergency broadcast can be extracted and displayed in an enlarged manner, it is possible to ensure the visibility of the emergency broadcast character information and the like.

  Further, according to the broadcast receiving apparatus having the ninth configuration, whether the receiving unit selects and receives one-segment broadcasting or multi-segment broadcasting, and is there an emergency broadcast that can be received through the receiving unit? It is determined whether or not. And when it is determined that there is an emergency broadcast that can be received, a multi-segment broadcast is received via the receiving means, so it is possible to display a video with sufficient image quality, such as text information of emergency broadcast, etc. Visibility can be ensured.

  Also, according to the broadcast receiving apparatus having the tenth configuration, the multi-segment broadcast is a 4-segment standard-definition broadcast or a 12-segment high-definition broadcast, so that the visibility of emergency broadcast text information, etc. is ensured. It becomes possible to do.

  That is, when it is determined that there is an emergency broadcast that can be received, a 4-segment standard-definition broadcast or a 12-segment high-definition broadcast is received. It becomes possible.

  Further, according to the broadcast receiving apparatus having the eleventh configuration, since it is determined whether there is an emergency broadcast that can be received based on TMCC, it is possible to accurately determine whether there is an emergency broadcast. .

  That is, based on the TMCC, it is determined whether there is an emergency broadcast that can be received. Since the TMCC includes information indicating whether the emergency broadcast is being performed, it is determined whether there is an emergency broadcast. It can be determined accurately.

  According to the broadcast receiving apparatus having the twelfth configuration, when it is determined that there is an emergency broadcast that can be received, the personal computer displays the received video in a predetermined area set in advance on the monitor. Since the instruction information is output, the visibility of the emergency broadcast text information and the like can be ensured.

  That is, when it is determined that there is an emergency broadcast that can be received, instruction information is output to the personal computer to display the received video in a predetermined area set in advance on the monitor. In addition, by setting the predetermined area to a sufficiently wide area necessary for ensuring visibility, it is possible to ensure the visibility of text information and the like of emergency broadcasts.

  In other words, when it is determined that there is an emergency broadcast that can be received, the video with sufficient image quality is enlarged and displayed in a sufficiently wide area, so that the visibility of text information and the like of the emergency broadcast can be ensured. .

  Further, according to the broadcast receiving apparatus having the thirteenth configuration, when it is determined that there is a receivable emergency broadcast, a channel that is a frequency band in which the receivable emergency broadcast is present is specified. Can be watched.

  That is, when it is determined that there is a receivable emergency broadcast, a channel in a frequency band with a receivable emergency broadcast is specified. Therefore, the user can watch the emergency broadcast by selecting the specified channel. It can be done.

  Further, according to the broadcast receiving apparatus having the fourteenth configuration, the emergency broadcast can be accurately broadcast because the receivable emergency broadcast channel is specified based on the PMT received by the receiving means. Can be identified.

  That is, the channel on which the emergency broadcast that can be received is broadcasted is specified based on the PMT received by the receiving means, and the PMT includes information indicating the channel on which the emergency broadcast is broadcast. It is possible to identify the channel on which the emergency broadcast is broadcast.

  Further, according to the broadcast receiving apparatus having the fifteenth configuration, since the emergency broadcast is broadcast to the receiving means, the user needs to select the channel on which the emergency broadcast is broadcast. Therefore, emergency broadcasts can be viewed with good convenience.

  Further, according to the broadcast receiving device having the sixteenth configuration, when it is determined that there is an emergency broadcast that can be received, the character information included in the emergency broadcast is acquired via the receiving unit, and the acquired character is acquired. Since the instruction information is output to the personal computer to display the information in a predetermined character size set in advance on the monitor, the visibility of the character information of the emergency broadcast is further ensured. Can do.

  That is, when it is determined that there is an emergency broadcast that can be received, the text information included in the emergency broadcast is acquired via the receiving means, and the acquired text information is set in a predetermined area set in advance on the monitor. Since the instruction information is output to the personal computer to display the displayed character size, the predetermined area is set to a sufficiently wide area, and the character size to be displayed is set to a sufficient size. The visibility of the emergency broadcast text information can be further ensured.

  Further, according to the broadcast receiving device having the above-described seventeenth configuration, whether one of the one-segment broadcast and the multi-segment broadcast is selected and received by the receiving means, and there is an emergency broadcast that can be received via the receiving means It is determined whether or not. When it is determined that there is an emergency broadcast that can be received, the text information included in the emergency broadcast is acquired via the receiving means, and the acquired text information is stored in a predetermined area set in advance on the monitor. Since the instruction information is output to the personal computer to display with the set character size, the visibility of the emergency broadcast character information can be ensured.

  That is, when it is determined that there is an emergency broadcast that can be received, the text information included in the emergency broadcast is acquired via the receiving means, and the acquired text information is set in a predetermined area set in advance on the monitor. Since the instruction information is output to the personal computer to display the displayed character size, the predetermined area is set to a sufficiently wide area, and the character size to be displayed is set to a sufficient size. The visibility of the emergency broadcast text information can be ensured.

  Further, according to the broadcast receiving device having the above-described eighteenth configuration, the character information included in the emergency broadcast is acquired via the receiving means only when the one-segment broadcast is received by the receiving means. It is possible to reduce the processing load required to ensure the visibility of the emergency broadcast.

  That is, when a multi-segment broadcast is received by the receiving means, it is possible to ensure the visibility of text information and the like of the emergency broadcast by viewing the video, and in this case, it is included in the emergency broadcast Since character information is not acquired, the processing load required to ensure the visibility of emergency broadcasts can be reduced.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an example of the configuration of a digital broadcast receiver according to the present invention. A digital broadcast receiver 1 (corresponding to a broadcast receiving apparatus) is an external tuner module, and is communicably connected to the personal computer 2.

  The digital broadcast receiver 1 receives an operation input from a user via the personal computer 2, receives a digital television broadcast based on the received operation input, and receives received video information, audio information, etc. Is output to the personal computer 2.

  The digital broadcast receiver 1 includes a receiving unit 11, a CPU 12, a RAM 13, a USB interface unit 14, a card interface unit 15, and a bus 16.

  A receiving unit 11 (corresponding to a receiving unit) receives and demodulates a digital television broadcast, and generates a transport stream (hereinafter referred to as TS [ Transport Stream]] is output to the personal computer 2 via the USB interface unit 14, and the antenna unit 111, the tuner unit 112, the demodulation unit 113, the descrambling processing unit 114, and the encryption unit 115 are provided. I have. In addition, the receiving unit 11 is a one-segment broadcast (hereinafter referred to as “one-segment broadcasting”) in accordance with an instruction transmitted from the CPU 23 of the personal computer 2 (a reception type changing unit 234 described later with reference to FIG. 2) via the CPU 12. ) And one of the multi-segment broadcasts is selected and received.

  As an example of the above-mentioned multi-segment broadcasting, 4-segment standard image quality broadcasting (SD [Standard Definition Television] broadcasting) or 12-segment high-quality image broadcasting (HD [High Definition Television] broadcasting, so-called high-vision broadcasting). Can be mentioned.

  The antenna unit 111 receives a television broadcast wave (for example, a terrestrial digital broadcast wave). The tuner unit 112 selects a broadcast of a target channel set in advance via the personal computer 2 from the television broadcast wave received by the antenna unit 111. One-segment broadcasting and multi-segment broadcasting are multiplexed on the selected signal here, and either one can be selected. The demodulation unit 113 demodulates the signal selected by the tuner unit 112 and performs error code correction processing and the like.

  The descrambling processing unit 114, when the output information output from the demodulation unit 113 is information that has been subjected to scramble processing (for example, when the received broadcast is a pay scrambled broadcast), the card interface unit 15 Based on the information stored in the IC card 3 attached to the card, the output information output from the demodulator 113 is descrambled. The encryption unit 115 adds a predetermined encryption process (for example, an encryption process based on DES [Data Encryption Standard] or AES [Advanced Encryption Standard]) to the output information output from the descrambling process unit 114. ) And output to the personal computer 2 via the USB interface unit 14.

  The CPU [Central Processing Unit] 12 controls the operation of the entire digital broadcast receiver 1 based on a command given from the personal computer 2. The CPU 12 also performs mutual authentication processing between the digital broadcast receiver 1 and the personal computer 2. A RAM [Random Access Memory] 13 stores various information such as channel information. The USB [Universal Serial Bus] interface unit 14 communicates with the personal computer 2 by the USB method. The card interface unit 15 is configured such that the IC card 3 is detachable, and reads information (key information or the like) used in the descrambling processing unit 114 from the mounted IC card 3. The bus 16 is for transmitting information between the devices arranged in the digital broadcast receiver 1.

  Next, the operation when the digital broadcast receiver 1 receives a broadcast will be described. First, the transmitted digital broadcast wave is received by the antenna unit 111. When a channel selection operation is accepted via the personal computer 2, switching of the transponder [Transponder] received by the tuner unit 112 is performed. The received digital broadcast wave is demodulated by the demodulation unit 113. The information demodulated by the demodulation unit 113 is descrambled by the descrambling unit 114, encrypted by the encryption unit 115, and output to the personal computer 2 via the USB interface unit 14. The

  On the other hand, the personal computer 2 outputs audio and video corresponding to audio information and video information input from the digital broadcast receiver 1, and includes an interface controller 20, a display 21, a speaker 22, a CPU 23, and a memory 24. , HDD 25, keyboard 26, I / O controller 27, PCI bridge 28, and bus 29.

  The interface controller 20 is means for controlling transmission / reception of signals between the digital broadcast receiver 1 and the personal computer 2.

  The display 21 (corresponding to a monitor) includes an LCD [Liquid Crystal Display], a PDP [Plasma Display Panel], and the like, and displays an image corresponding to the image information input from the digital broadcast receiver 1 so as to be visible from the outside. Is. The display controller 211 displays a video corresponding to the video information input from the digital broadcast receiver 1 on the display 21. The VRAM 212 is means for temporarily storing display data processed by the display controller 211. The speaker 22 outputs sound corresponding to the sound information input from the digital broadcast receiver 1. The sound controller 221 outputs sound corresponding to the sound information input from the digital broadcast receiver 1 to the speaker 22.

  The CPU 23 controls the operation of the entire personal computer 2, and further controls the operation of the entire digital broadcast receiving system including the digital broadcast receiver 1. In addition, although the instruction | indication with respect to each part (for example, receiving part 11) of the digital broadcast receiver 1 is indirectly transmitted from CPU23 via CPU12 of the digital broadcast receiver 1, the structure of this invention is to this. The configuration is not limited, and the CPU 23 may directly transmit an instruction to each unit of the digital broadcast receiver 1.

  The memory 24 is composed of RAM, ROM [Read Only Memory], and the like, and stores various information. The HDD [Hard Disk Drive] 25 stores video information received by the digital broadcast receiver 1.

  The keyboard 26 includes various keys such as a numeric keypad and an alphabet key, receives an operation input from the user, and outputs a signal corresponding to the received operation input to the CPU 23 via the I / O controller 27. . The I / O [Input / Output] controller 27 is interposed between the HDD 25 and keyboard 26 and the bus 29 and controls input / output operations of the HDD 25 and keyboard 26 in accordance with instructions from the CPU 23. The PCI [Peripheral Component Interconnect] bridge 28 is a circuit for connecting the CPU 23, the display controller 211, and the audio controller 221 to the bus 29 so that they can communicate with each other. The bus 29 is for transmitting information between the devices arranged in the personal computer 2.

  When viewing broadcast program content, the personal computer 2 configured as described above receives the encrypted TS from the digital broadcast receiver 1 via the interface controller 20, and uses the CPU 23 to perform predetermined control installed in the HDD 25. Run the program (software for receiving digital broadcasts). Thereby, the encryption decryption process is performed as a software process, and then the decode process is performed as a software process. At this time, MPEG-2 decoding is performed for HD broadcasting (12-segment broadcasting), and H.264 for 1-segment broadcasting. H.264 decoding is performed.

  In the above description, the encryption decryption processing and the configuration in which the decoding processing is implemented as software processing have been described as an example. However, the configuration of the present invention is not limited to this, and is dedicated. If the above hardware is added, the above-described processing can be performed as hardware processing.

  Thereafter, the decoded data is subjected to filtering processing (selection processing of various data), and the video data is input to the display controller 211 and then displayed on the display 21. Also, after the audio data is input to the audio controller 221, the speaker 22 is caused to ring through digital / analog conversion processing, amplification processing, and the like. Further, data for a broadcast program guide (EPG [Electronic Program Guide]) is analyzed by the CPU 23, then multiplexed with video data by a GUI (Graphical User Interface) processing means (not shown), and synthesized into video. It is displayed on the display 21.

  On the other hand, when the broadcast program content is recorded, in addition to the above-described operation, the encrypted TS input to the interface controller 20 is recorded on the HDD 25 via the I / O controller 27.

  When the broadcast program content is played back, the TS recorded in the HDD 25 is sent to the descrambling processing unit 114 via the I / O controller 27, the interface controller 20, and the USB interface unit 14, and the descrambling processing is performed. Done. The encryption processing unit 115 performs a predetermined encryption process on the output information output from the descrambling processing unit 114 and then outputs the output information to the personal computer 2 again via the USB interface unit 14. Thereafter, the personal computer 2 performs the same processing as when viewing the broadcast program content described above.

  In addition to the viewing operation, recording operation, and playback operation of the broadcast program content as described above, the present invention provides a richer amount of information when an emergency broadcast occurs when receiving a 1-segment broadcast. It is characterized in that the broadcast reception mode is automatically switched or the character information is enlarged (or displayed at maximum) so that it can be viewed in the data format of a multi-segment broadcast. Hereinafter, a configuration for realizing the above characteristic operation will be described in detail.

  FIG. 2 is a block diagram showing an example of the functional configuration of the main part in the digital broadcast receiving system according to the present invention. The CPU 23 of the personal computer 2 functionally includes a broadcast determination unit 231, a channel identification unit 232, a channel setting unit 233, a reception form change unit 234, a video display control unit 235, a character acquisition unit 236, and a character display control unit 237. The memory 24 functionally includes a reception condition storage unit 241.

  Here, the CPU 23 reads out and executes the control program installed in the HDD 25, whereby the broadcast determination unit 231, the channel specifying unit 232, the channel setting unit 233, the reception form changing unit 234, the video display control unit 235, character acquisition It functions as functional units such as the unit 236 and the character display control unit 237 and also causes the memory 24 to function as functional units such as the reception condition storage unit 241.

  Of various data stored in the memory 24, data that can be stored in a removable recording medium is read by a drive such as a hard disk drive, an optical disk drive, a flexible disk drive, a silicon disk drive, or a cassette medium reader. In this case, the recording medium is, for example, a hard disk, an optical disk, a flexible disk, a CD [Compact Disc], a DVD [Digital Versatile Disc], a semiconductor memory, or the like.

  The reception condition storage unit 241 is set in the reception unit 11 (not shown in FIG. 2) of the digital broadcast receiver 1 when the broadcast determination unit 231 determines that there is an emergency broadcast that can be received. The segment information indicating whether to receive the segment broadcast or the multi-segment broadcast and the channel information indicating the channel being received are stored, and the position where the received video is displayed on the display 21 of the personal computer 2 is stored. The display position information to be displayed and the display size information to indicate the size to be displayed are stored.

  The segment information, channel information, display position information, and display size information stored in the reception condition storage unit 241 are written by the broadcast determination unit 231, and the channel setting unit 233, the reception form change unit 234, and the video display control unit 235. Is read out.

  The broadcast determination unit 231 (corresponding to the broadcast determination unit) receives emergency broadcasts that can be received via the reception unit 11 at a predetermined cycle (hereinafter referred to as “confirmation cycle”: for example, a 10-second cycle). It is determined whether or not there is. More specifically, the broadcast determination unit 231 determines whether there is an emergency broadcast that can be received based on TMCC [Transmission and Multiplexing Configuration Control] received via the reception unit 11. Here, TMCC includes information indicating whether or not an emergency broadcast is being performed.

  When the broadcast determination unit 231 determines that there is a receivable emergency broadcast (= emergency broadcast has started), the broadcast condition determination unit 231 receives the segment information and channel information set in the reception unit 11. The display position information and the display size information on the display 21 of the personal computer 2 are written into the reception condition storage unit 241 as well as being written into the 241.

  The channel specifying unit 232 (corresponding to the channel specifying means), when the broadcast determining unit 231 determines that there is an emergency broadcast that can be received (= emergency broadcast has started), the frequency at which the emergency broadcast can be received. A channel that is a band is specified. Specifically, the channel specifying unit 232 specifies a channel on which a receivable emergency broadcast is broadcast based on the PMT [Program Map Table] received by the receiving unit 11. Here, the PMT includes information indicating a channel on which an emergency broadcast is broadcast.

  The channel setting unit 233 (corresponding to a channel setting unit) determines whether there is an emergency broadcast that can be received by the broadcast determination unit 231 (= emergency broadcast has started). The channel specified by the specifying unit 232 is set. That is, the channel setting unit 232 sets the channel of the receiving unit 11 so that the channel specified by the channel specifying unit 232 is received via the receiving unit 11.

  Further, the channel setting unit 233 stores the reception condition storage unit 241 in the reception unit 11 when it is determined by the broadcast determination unit 232 that there is no receivable emergency broadcast (= emergency broadcast has ended). The channel corresponding to the received channel information (= the channel set before receiving the emergency broadcast) is set.

  When the broadcast determination unit 231 determines that there is an emergency broadcast that can be received (= emergency broadcast has started), the reception form change unit 234 (corresponding to the reception form change unit) A multi-segment broadcast (here, SD broadcast or HD broadcast) is received.

  In addition, when the broadcast determination unit 231 determines that there is no emergency broadcast that can be received (= emergency broadcast has ended), the reception form change unit 234 stores the reception condition change unit 234 in the reception condition storage unit 241. The broadcast is received in a broadcast form (1-segment broadcast or multi-segment broadcast) corresponding to the stored segment information.

  The video display control unit 235 (corresponding to the video display control unit) is preset in the display 21 when the broadcast determination unit 231 determines that there is an emergency broadcast that can be received (= emergency broadcast has started). The instruction information is output to the display controller 211 in order to display the received video on the predetermined area (here, the video display unit 431 set on the right side of the screen of the display 21 shown in FIG. 6B). Is.

  The video display control unit 235 also displays the display position information stored in the reception condition storage unit 241 and the display position information when the broadcast determination unit 231 determines that there is no emergency broadcast that can be received (= emergency broadcast is terminated). Based on the display size information, a display controller for displaying a video on the display 21 with a corresponding position and size (here, the video display unit 401 set at the upper right of the screen of the display 21 shown in FIG. 5A). The instruction information is output to 211.

  The character acquisition unit 236 (corresponding to the character acquisition unit), when the broadcast determination unit 231 determines that there is an emergency broadcast that can be received (= emergency broadcast has started), the emergency broadcast via the reception unit 11 The character information contained in is acquired.

  The character display control unit 237 (corresponding to the character display control means) displays the character information acquired by the character acquisition unit 236 on the display 21 in a predetermined area (here, FIG. 6B). The instruction information is output to the display controller 211 so as to be displayed in a predetermined character size (for example, a size of 5 mm × 5 mm) on the character display unit 432 set at the upper right of the display 21. is there.

  The character display control unit 237 terminates the display of character information on the display 21 when the broadcast determination unit 231 determines that there is no emergency broadcast that can be received (= emergency broadcast has ended). is there.

  3 and 4 are flowcharts showing an example of the operation of the digital broadcast receiving system (mainly the CPU 23). Here, for the sake of convenience, a case will be described in which the receiving unit 11 selects and receives one of high-quality image broadcasting (= HD broadcasting) that is 1-segment broadcasting and 12-segment broadcasting. First, the broadcast determination unit 231 determines whether it is a confirmation cycle (= whether it is a timing for determining whether there is an emergency broadcast) (S101).

  If it is determined that the period is not the confirmation cycle (NO in S101), the process is set to a standby state. When it is determined that it is the confirmation cycle (YES in S101), the broadcast determination unit 231 determines whether or not the emergency broadcast is started (S103). If it is determined that the emergency broadcast has not started (NO in S103), the process returns to step S101, and the processes after step S101 are repeatedly executed. If it is determined that the emergency broadcast has been started (YES in S103), the broadcast determination unit 231 sets the segment information, channel information, display position information on the display 21 of the personal computer 2, The display size information is stored in the reception condition storage unit 241 (S105).

  Then, the channel on which the emergency broadcast is started is specified by the channel specifying unit 232 (S107). Next, the channel of the receiving unit 11 is set by the channel setting unit 233 to receive the channel specified in step S107 (S109). Next, the reception form changing unit 234 determines whether or not one-segment broadcasting is received via the receiving unit 11 (S111). If it is determined that the 1-segment broadcast is not received (= the HD broadcast is received) (NO in S111), the process proceeds to step S115 shown in FIG. When it is determined that the 1-segment broadcast is received (YES in S111), the reception form changing unit 234 receives the HD broadcast via the receiving unit 11 (S113).

  In the case of NO in step S111 or when the process of step S113 is completed, as shown in FIG. 4, a predetermined area (here, FIG. 6) set in advance on the display 21 by the video display control unit 235. Instruction information is output to the display controller 211 to enlarge and display the received video on the video display unit 431 set on the right side of the screen of the display 21 shown in (b) (S115). Then, the character acquisition unit 236 acquires character information included in the emergency broadcast via the receiving unit 11 (S117). Next, the character information acquired in step S117 is set by the character display control unit 237 in a predetermined area on the display 21 (here, the upper right of the screen of the display 21 shown in FIG. 6B). Instruction information is output to the display controller 211 so as to be enlarged and displayed at a character size set in advance (for example, a size of 5 mm × 5 mm) on the character display unit 432 (S119).

  Next, the broadcast determination unit 231 determines whether or not it is a confirmation cycle (= whether or not there is an emergency broadcast at a determination timing) (S121). If it is determined that it is not the confirmation cycle (NO in S121), the process returns to step S115, and the processes after step S115 are repeatedly executed. When it is determined that it is the confirmation cycle (YES in S121), the broadcast determination unit 231 determines whether or not the emergency broadcast is ended (S123). If it is determined that the emergency broadcast has not ended (NO in S123), the process returns to step S115, and the processes after step S115 are repeatedly executed. If it is determined that the emergency broadcast has ended (YES in S123), the character display control unit 237 ends the display of the character information on the display 21 (S125).

  Then, the video display control unit 235 sets the position and size respectively corresponding to the display position information and the display size information stored in the reception condition storage unit 241 (here, set at the upper right of the screen of the display 21 shown in FIG. 5A). The instruction information is output to the display controller 211 to display the video in the selected area 401) (S127). Next, the reception form change unit 234 receives the broadcast form (1-segment broadcast or multi-segment broadcast) corresponding to the segment information stored in the reception condition storage unit 241 via the reception unit 11 (S129). Next, the channel setting unit 233 sets the channel corresponding to the channel information stored in the reception condition storage unit 241 (= the channel set before receiving the emergency broadcast) for the receiving unit 11 (S131). ), The process is returned to step S101 shown in FIG. 3, and the processes after step S101 are repeatedly executed.

  5 and 6 are screen diagrams showing examples of screens displayed on the display 21 in steps S115 to S117 shown in FIG. FIG. 5A shows a screen 400 displayed on the display 21 when the emergency broadcast is not received, and FIG. 6B shows a screen displayed on the display 21 when the emergency broadcast is received. 5B and FIG. 6A are other forms of screens 410 and 420 displayed on the display 21 when an emergency broadcast is received.

  As shown in FIG. 5A, when the emergency broadcast is not received, a video display unit 401 is displayed on the upper right part of the screen 400. The video display unit 401 is a narrow area (for example, 40 mm × 60 mm) that suitably displays video when a 1-segment broadcast is received via the receiving unit 11.

  As shown in FIG. 6B, when the emergency broadcast is received, the video display unit 431 is displayed on the right side of the screen 430, and the character display unit 432 is displayed on the upper part of the video display unit 431. ing. The video display unit 431 is a wide area (for example, 200 mm × 300 mm) that suitably displays video when an HD broadcast is received via the receiving unit 11. The character display unit 432 displays character information included in the emergency broadcast in a preset character size (for example, a size of 5 mm × 5 mm).

  As shown in FIG. 5B or 6A, when an emergency broadcast is received, a screen 410 or a screen 420 is displayed instead of the screen 430 shown in FIG. 6B. Also good. On the screen 410 shown in FIG. 5B, a video display unit 411 is displayed on the right side. The video display unit 411 is a wide area (for example, 200 mm × 300 mm) that suitably displays video when an HD broadcast is received via the receiving unit 11.

  On the screen 420 shown in FIG. 6A, a video display unit 421 is displayed on the upper right part, and a character display unit 422 is displayed on the lower side of the video display part 421. The video display unit 421 is a narrow area (for example, 40 mm × 60 mm) that suitably displays video when a 1-segment broadcast is received via the receiving unit 11. The character display unit 422 displays character information included in the emergency broadcast with a preset character size (for example, a size of 5 mm × 5 mm).

  In this way, whether or not there is an emergency broadcast that can be received by the receiving unit 11 by selecting one of the one-segment broadcasting and the multi-segment broadcasting (= SD broadcasting or HD broadcasting) and receiving via the receiving unit 11. Is determined. When it is determined that there is an emergency broadcast that can be received, a multi-segment broadcast is received via the receiving unit 11, so that an image with sufficient image quality can be displayed. The visibility of information and the like can be ensured.

  Further, since the multi-segment broadcast is a 4-segment standard-definition broadcast (= SD broadcast) or a 12-segment broadcast high-definition image quality broadcast (= HD broadcast), it is possible to ensure the visibility of text information and the like of emergency broadcasts. It becomes possible.

  That is, when it is determined that there is an emergency broadcast that can be received, a 4-segment standard-definition broadcast or a 12-segment high-definition broadcast is received via the receiving unit 11, so that visual information such as emergency broadcast text information can be viewed. It becomes possible to ensure the property.

  Furthermore, since it is determined whether there is an emergency broadcast that can be received based on the TMCC, it is possible to accurately determine whether there is an emergency broadcast.

  That is, based on TMCC, it is determined whether or not there is an emergency broadcast that can be received. Since TMCC includes information indicating whether or not the emergency broadcast is being performed, whether or not there is an emergency broadcast. It can be accurately determined.

  In addition, when it is determined that there is an emergency broadcast that can be received, the received video is displayed in a predetermined area (here, the video display unit 431 shown in FIG. 6B) set on the display 21. Therefore, since the instruction information is output to the display controller 211, the visibility of the emergency broadcast text information and the like can be ensured.

  That is, when it is determined that there is an emergency broadcast that can be received, instruction information is output to the display controller 211 in order to display the received video in a predetermined area set in advance on the display 21. By setting the predetermined area set in advance to a sufficiently wide area necessary for ensuring the visibility, the visibility of the emergency broadcast text information and the like can be ensured.

  That is, when it is determined that there is an emergency broadcast that can be received, a video with sufficient image quality is enlarged and displayed in a sufficiently wide area, so that the visibility of text information and the like of the emergency broadcast can be ensured. .

  In addition, when it is determined that there is a receivable emergency broadcast, a channel having a frequency band in which the receivable emergency broadcast is present is specified, so that the emergency broadcast can be viewed.

  That is, when it is determined that there is a receivable emergency broadcast, a channel in a frequency band with a receivable emergency broadcast is specified. Therefore, the user can watch the emergency broadcast by selecting the specified channel. It can be done.

  Further, since the channel on which the emergency broadcast that can be received is broadcasted is specified based on the PMT received by the receiving unit 11, the channel on which the emergency broadcast is broadcast can be accurately specified.

  That is, the channel on which the emergency broadcast that can be received is broadcasted based on the PMT received by the receiving unit 11 is specified, and the PMT includes information indicating the channel on which the emergency broadcast is broadcast. It is possible to accurately identify the channel on which the emergency broadcast is broadcast.

  In addition, since the user is not required to select a channel on which the emergency broadcast is broadcast because the emergency broadcast is set for the receiving unit 11, the user can view the emergency broadcast with good convenience. be able to.

  In addition, when it is determined that there is an emergency broadcast that can be received, character information included in the emergency broadcast is acquired via the reception unit 11, and the acquired character information is stored in a predetermined region ( Since the instruction information is output to the display controller 211 so as to be displayed in a preset character size (here, a size of 5 mm × 5 mm) on the character display unit 432) illustrated in FIG. The visibility of the character information can be ensured more reliably.

  That is, when it is determined that there is an emergency broadcast that can be received, the text information included in the emergency broadcast is acquired via the receiving unit 11, and the acquired text information is stored in a predetermined area set in advance on the display 21. Since instruction information is output to the display controller 211 to display in a preset character size, a predetermined area is set to a sufficiently large area, and a character size to be displayed is set to a sufficient size. By doing so, the visibility of the emergency broadcast text information can be more reliably ensured.

  In addition to the flowcharts shown in FIG. 3 and FIG. 4, the flowchart shown in FIG. 7A and FIG. It is good to follow.

  FIGS. 7A and 7B are flowcharts showing another example of the operation of the digital broadcast receiving system (mainly the CPU 23). FIG. 7 (a) is for explaining the automatic switching process of the reception mode at the time of emergency broadcast reception, and FIG. 7 (b) explains the automatic enlargement display process of character information at the time of emergency broadcast reception. Is to do.

  As shown in FIG. 7A, in step S201, in order to periodically monitor the occurrence of emergency broadcasts, a determination is made as to whether or not a predetermined confirmation cycle has been reached. Here, when it is determined that the predetermined confirmation period is reached, the flow proceeds to step S202. On the other hand, when it is determined that it is not the predetermined confirmation cycle, a series of flows is ended.

  If it is determined in step S201 that the predetermined confirmation cycle has been reached, it is determined in step S202 whether or not an emergency broadcast is occurring. If it is determined that an emergency broadcast is being generated, the flow proceeds to step S203. On the other hand, if it is determined that the emergency broadcast is not occurring, the flow proceeds to step S206.

  If it is determined in step S202 that an emergency broadcast is occurring, it is determined in step S203 whether or not the emergency information bit is “1”. Here, when it is determined that the emergency information bit is not “1”, the emergency broadcast that is currently being generated is in a state in which the visibility is improved by the automatic switching process of the reception mode (that is, reception of the multi-segment broadcast). Under the recognition that the user is not confirmed, the flow proceeds to step S204. On the other hand, if it is determined that the emergency information bit is “1”, the emergency broadcast currently being generated has already been confirmed by the user in a state where the visibility has been enhanced by the automatic switching process of the reception mode. A series of flows is completed with the recognition that it is a thing.

  If it is determined in step S203 that the emergency information bit is not “1”, in step S204, it is determined whether or not the current broadcast reception mode is the 1 segment mode (a mode for receiving 1 segment broadcast). . If it is determined that the current broadcast reception mode is the 1 segment mode, the flow proceeds to step S205. On the other hand, if it is determined that the current broadcast reception mode is not the 1-segment mode, the current broadcast reception mode is already a multi-segment mode (a mode for receiving a multi-segment broadcast), and it is not necessary to switch the reception mode. A series of flows is terminated.

  If it is determined in step S204 that the broadcast reception mode is the 1-segment mode, the broadcast reception mode is automatically switched from the 1-segment mode to the multi-segment mode in step S205, and the emergency information bit is set to “1”. After that, a series of flow is finished. By such automatic switching processing of the reception form, it becomes possible to ensure the visibility of the emergency broadcast text information and the like.

  Further, by setting the emergency information bit to “1” in accordance with the automatic switching process of the reception form, it is possible to leave a history of confirming the current emergency broadcast in the multi-segment mode. In the configuration using such an emergency information bit (emergency broadcast confirmation flag), the user performs an operation of selecting another channel after the automatic switching process of the reception mode is performed with the occurrence of the emergency broadcast. Even if the 1-segment broadcast is received again, the above-described automatic switching process of the reception mode is not repeated, which is convenient for the user.

  On the other hand, if it is determined in step S202 that no emergency broadcast has occurred, in step S206, the emergency information bit is set to “0”, and then the series of flows is terminated.

  Note that the basic flow (steps S201 to S203 and step S206) is the same as that in FIG. 7A in the case of performing automatic enlargement display processing of character information at the time of emergency broadcast reception. As shown in b), in step S204 ′, it is determined whether or not the enlarged display of the character information is being performed for the emergency broadcast that is currently occurring. In step S205 ′, it is sufficient to extract only character information from the emergency broadcast that is currently being generated and to perform an enlarged display thereof.

  Moreover, this invention is applicable also to the following forms (A)-(E).

  (A) In the above embodiment, the case where the broadcast receiving device is the digital broadcast receiver 1 that receives only the digital television broadcast has been described. However, the broadcast receiving device is a digital television broadcast and analog. It may be a broadcast receiver that receives both types of television broadcasts.

  (B) In the above embodiment, the case where the digital broadcast receiver 1 is a separate housing from the personal computer 2 has been described. However, the digital broadcast receiver 1 may be configured integrally with the personal computer 2. . In this case, since the communication between the digital broadcast receiver 1 and the personal computer 2 is not necessary, the processing is simplified.

  FIG. 8 is a block diagram showing an example of a configuration in the case where the digital broadcast receiver is configured integrally with a personal computer. 8 that are the same as those shown in FIG. 1 are given the same reference numerals, and descriptions thereof are omitted. As shown in FIG. 8, in the case of the present embodiment (B), the bus 16 and the bus 29 shown in FIG. 1 are connected to form an integrated bus 29A. Further, the functions of the CPU 12 and the CPU 23 are all realized by the CPU 23A. That is, functional units such as the broadcast determination unit 231, the channel specification unit 232, the channel setting unit 233, the reception form change unit 234, the video display control unit 235, the character acquisition unit 236, and the character display control unit 237 of the CPU 23 are realized by the CPU 23 </ b> A. Has been. Also, functional units such as the reception condition storage unit 241 of the memory 24 are realized by the memory 24A. Information stored in the RAM 13 is stored in the memory 24A.

  (C) In the above embodiment, the CPU 23 determines the broadcast determination unit 231, the channel specification unit 232, the channel setting unit 233, the reception form change unit 234, the video display control unit 235, the character acquisition unit 236, the character display control unit 237, etc. However, the broadcast determination unit 231, the channel specification unit 232, the channel setting unit 233, the reception form change unit 234, the video display control unit 235, the character acquisition unit 236, and the character display control unit are described. Of 237, at least one functional unit may be configured by hardware such as a circuit.

  (D) In the above embodiment, the digital broadcast receiver 1 will be described by taking as an example a configuration in which one of the 1-segment broadcast and the multi-segment broadcast is selected and decoded and transferred to the personal computer 2 as an example. However, the configuration of the present invention is not limited to this, and by changing the hardware configuration, the digital broadcast receiver 1 decodes both 1-segment broadcasting and multi-segment broadcasting at the same time. It is also possible to transfer to the personal computer 2.

  (E) In the above-described embodiment, the CPU 23 mounted on the personal computer 2 is mainly used to perform automatic switching processing of the reception mode at the time of emergency broadcast reception or automatic enlargement display processing of character information (in other words, this book Detailed description has been given by taking as an example a configuration in which means for realizing various functions according to the invention are collected on the personal computer 2 side, but the configuration of the present invention is not limited to this, and a digital broadcast receiver 1 may be externally attached to the personal computer 2, and the same processing as described above may be performed mainly by the CPU 12 mounted in the digital broadcast receiver 1.

  When the form (E) is adopted, the broadcast determination unit 121, the channel, and the like are used in the form shown in FIG. 9 by using the CPU 12 mounted on the digital broadcast receiver 1 instead of the CPU 23 mounted on the personal computer 2. Functional units such as the specifying unit 122, the channel setting unit 123, the reception form changing unit 124, the video display control unit 125, the character acquisition unit 126, and the character display control unit 127 are realized. The information stored in the memory 24 is stored in the RAM 13. That is, using the RAM 13, functional units such as the reception condition storage unit 131 are realized in the form shown in FIG.

  That is, the CPU 12 reads and executes a control program stored in advance in a ROM (not shown) or the like, thereby executing a broadcast determination unit 121, a channel specifying unit 122, a channel setting unit 123, a reception form changing unit 124, and a video display control unit. 125, functions as a function unit such as a character acquisition unit 126, a character display control unit 127, and the like, and causes the RAM 13 to function as a function unit such as a reception condition storage unit 131.

  In short, when the present invention is implemented, the main body that performs the automatic switching processing of the reception mode at the time of emergency broadcast reception or the automatic enlargement display processing of character information is either the digital broadcast receiver 1 or the personal computer 2. In addition to an external tuner module (broadcast receiving device), a broadcast receiving method, a broadcast receiving system, and a personal computer that can realize each of the above-described processes and a personal computer (a tuner module is connected and a TV control program is installed) It can be said that all of the above are within the technical scope of the present invention.

  The present invention can be used for a broadcast receiving method, a broadcast receiving system, a personal computer, and a broadcast receiving apparatus (tuner module) capable of receiving a digital broadcast.

These are block diagrams which show an example of a structure of the digital broadcast receiver which concerns on this invention. These are block diagrams which show an example of a function structure of the principal part in the digital broadcast receiving system which concerns on this invention. These are flowcharts (first half part) which show an example of operation | movement of a digital broadcast receiving system (mainly CPU23). These are flowcharts (latter half part) which show an example of operation | movement of a digital broadcast receiving system (mainly CPU23). These are screen figures which show an example of the screen displayed on the display 21 in step S115-S117 shown in FIG. These are screen figures which show another example of the screen displayed on the display 21 in step S115-S117 shown in FIG. These are flowcharts which show another example of operation | movement of a digital broadcast receiving system (mainly CPU23). These are block diagrams which show an example of a structure in case a digital broadcast receiver is comprised integrally with a personal computer. These are block diagrams which show another example of the function structure of the principal part in the digital broadcast receiving system which concerns on this invention.

Explanation of symbols

1 Digital broadcast receiver (broadcast receiver)
11 Receiver (Receiving means)
112 Tuner 12 CPU
13 RAM
2 Personal computer 21 Display (monitor)
22 Speaker 23 CPU
231 Broadcast determination unit (broadcast determination means)
232 Channel identification part (channel identification means)
233 channel setting section (channel setting means)
234 Reception form changing unit (Reception form changing means)
235 Video display control unit (video display control means)
236 Character acquisition unit (character acquisition means)
237 Character display control unit (character display control means)
24 Memory 241 Reception Condition Storage Unit 26 Keyboard

Claims (10)

  An external tuner module for receiving a digital broadcast is externally attached to the image display device, and when an emergency broadcast occurs when the digital broadcast is received as a one-segment broadcast, this is detected and switched to the reception of a multi-segment broadcast. Alternatively, a broadcast receiving method, wherein only character information included in the emergency broadcast is extracted and displayed in an enlarged manner.   The broadcast receiving method according to claim 1, wherein the multi-segment broadcast is a 4-segment standard-definition broadcast or a 12-segment high-definition broadcast.   The broadcast receiving method according to claim 1, wherein the image display device is a personal computer including a display.   A tuner module that receives a digital broadcast, and an image display device that can be connected to the tuner module and that can receive a digital broadcast by inputting a digital broadcast signal from the tuner module. If an emergency broadcast occurs when a digital broadcast is received as a one-segment broadcast, this is detected and switched to the reception of a multi-segment broadcast, or only character information included in the emergency broadcast is extracted. A broadcast receiving system characterized by performing the enlarged display.   5. The broadcast receiving system according to claim 4, wherein the multi-segment broadcast is a 4-segment standard-definition broadcast or a 12-segment high-definition broadcast.   6. The broadcast receiving system according to claim 4, wherein the image display device is a personal computer provided with a display.   Built-in tuner module for receiving digital broadcasting, and if an emergency broadcast occurs while receiving a digital broadcast as a one-segment broadcast, this is detected and switched to the reception of a multi-segment broadcast, or the emergency broadcast A personal computer characterized by extracting only the character information contained in and performing an enlarged display thereof.   8. The personal computer according to claim 7, wherein the multi-segment broadcast is a 4-segment standard-definition broadcast or a 12-segment high-definition broadcast. A broadcast receiving device that is communicably connected to a personal computer equipped with a monitor, receives a digital television broadcast, and outputs it to the monitor,
Receiving means for selecting and receiving one of one-segment broadcasting and plural-segment broadcasting;
Broadcast determination means for determining whether there is an emergency broadcast that can be received via the reception means;
When it is determined that there is an emergency broadcast that can be received by the broadcast determination unit, the reception mode changing unit that causes the reception unit to receive a multi-segment broadcast;
A broadcast receiving apparatus comprising: A broadcast receiving device that is communicably connected to a personal computer equipped with a monitor, receives a digital television broadcast, and outputs it to the monitor,
Receiving means for selecting and receiving one of one-segment broadcasting and plural-segment broadcasting;
Broadcast determination means for determining whether there is an emergency broadcast that can be received via the reception means;
When it is determined that there is an emergency broadcast that can be received by the broadcast determination means, character acquisition means for acquiring text information included in the emergency broadcast via the reception means;
Character display control means for outputting instruction information to the personal computer so that the character information acquired by the character acquisition means is displayed on the monitor in a predetermined area with a predetermined character size. When,
A broadcast receiving apparatus comprising:

Images