JP4895779B2 - Transmission device, reception device, and transmission method - Google Patents

Description

  The present invention relates to a transmission device, a reception device, and a transmission method, and more particularly to a transmission device that retransmits a part of a digital broadcast, a reception device that receives a digital broadcast, and a transmission method executed by the transmission device.

  2. Description of the Related Art In recent years, transmission apparatuses equipped with a gap filler function for receiving radio waves in places where radio waves are easily reached, such as television broadcasting, and retransmitting them to places where radio waves are difficult to reach, have been distributed. Places where radio waves are difficult to reach are, for example, underground and in buildings. For example, in the retransmission method described in Japanese Patent Laid-Open No. 2005-341195, an OFDM (Orthogonal Frequency Division Multiplexing) terrestrial digital broadcast wave divided into 13 segments is received, and a predetermined terrestrial digital broadcast wave is received from the received terrestrial digital broadcast wave. One segment for partial reception is extracted. Then, the extracted one-segment signal is retransmitted to a partial receiver for partial reception existing in a specific area (park, station, train car, etc.).

However, broadcast signals that are retransmitted in places where radio waves are difficult to reach, such as underground, must be transmitted in the same frequency band as terrestrial broadcast signals, and since only a part of a wide frequency band is used, radio waves are used effectively. There is a problem that can not be done. On the other hand, broadcast signals that are retransmitted in places where radio waves are difficult to reach, such as underground, can be transmitted in a frequency band different from that of terrestrial broadcast signals, but mobile phones may specify the frequency band of underground broadcast signals. Since this is not possible, there is a problem that it is impossible to continuously receive the same broadcast signal as the broadcast signal received on the ground. You can search for all broadcast signals in the basement, but you cannot specify which frequency band is the same broadcast signal as the broadcast signal received on the ground. The user has to receive a broadcast signal in the frequency band and actually check the image by viewing it.
JP 2005-341195 A

  The present invention has been made to solve the above-described problems, and one of the objects of the present invention is to provide a transmission apparatus and a transmission method that effectively use radio waves.

  Another object of the present invention is to provide a receiving apparatus that prevents a video being viewed from being interrupted.

In order to achieve the above-described object, according to an aspect of the present invention, a transmission device receives one selected from a plurality of broadcast signals, and among a plurality of segments constituting the received broadcast signal. Receiving means for demodulating at least one predetermined segment and outputting data corresponding to the selected broadcast signal, and data corresponding to the selected broadcast signal output by the receiving means comprising a plurality of segments Broadcast signal generating means for allocating to any segment of a predetermined broadcast signal different from a plurality of broadcast signals, and sending means for transmitting the predetermined broadcast signal . The broadcast signal generating means includes: Broadcast information indicating which data corresponding to the selected broadcast signal to be output is assigned to which of a plurality of segments constituting the predetermined broadcast signal constitutes the predetermined broadcast signal. Including broadcast information generating means for assigning a predetermined segment as a segment of out strong bands of a plurality of segments.

  According to this aspect, since a predetermined broadcast signal composed of a plurality of segments is transmitted, a receiving device that receives the broadcast signal can receive the predetermined broadcast signal. Further, since a plurality of broadcast signals are assigned to a plurality of segments constituting a predetermined broadcast signal, radio waves can be used effectively. As a result, it is possible to provide a transmission device that effectively uses radio waves.

Also, broadcast information indicating to which of the plurality of segments constituting the predetermined broadcast signal the data corresponding to the selected broadcast signal is assigned to a segment predetermined as a strong band segment among the plurality of segments. It is done. Therefore, it is possible to a receiving apparatus for receiving a transmission signal release, it is possible to receive the broadcast information to the first and notifies the content of the segments included in a predetermined broadcast signal.

According to another aspect of the present invention, a receiving means for receiving at least one segment among a plurality of segments constituting a broadcast signal selected from a plurality of broadcast signals, and one of the plurality of broadcast signals. Selecting means for receiving by the receiving means, judging means for judging whether or not the segment received by the receiving means is reproducible, and when judging by the judging means that reproduction is not possible, Search means for searching for a reproducible broadcast signal from among a plurality of broadcast signals by searching for one segment predetermined as a strong band segment among a plurality of included segments, and reproducible by the search means When a broadcast signal is detected, a segment that causes the receiving means to receive one of a plurality of segments constituting the reproducible broadcast signal detected. Comprising a preparative receiving means, and storage means for storing a broadcast signal identification information for identifying a broadcast signal selected by the selection means before being judged unreproducible by determination means, segment receiving means is detected Based on the acquired broadcast information, broadcast information acquisition means for acquiring broadcast information indicating which of the plurality of broadcast signals is assigned to each of the plurality of segments constituting the reproducible broadcast signal, Segment determination means for determining a segment to which a broadcast signal identified by the stored broadcast signal identification information is assigned, and the broadcast information acquisition means is a strong one of the plurality of segments constituting the detected reproducible broadcast signal. The receiving unit receives one segment that is predetermined as a band segment, and broadcast information is acquired based on the data output by the receiving unit. That.

According to this aspect, it is determined whether or not the received segment is reproducible, and when it is determined that the replay is not possible, it is predetermined as a strong band segment among a plurality of segments included in each of the plurality of broadcast signals. By searching one segment, a reproducible broadcast signal is searched. One segment predetermined as a strong band segment among a plurality of segments constituting a reproducible broadcast signal is received, and broadcast information is acquired based on data output by the receiving means. Further, a segment to which a broadcast signal identified by the stored broadcast signal identification information is assigned is determined based on the broadcast information. For this reason, when the broadcast signal being received becomes unreproducible, another broadcast signal is received. Therefore, it is possible to provide a broadcast receiving apparatus that prevents the video being viewed from being interrupted.

According to still another aspect of the present invention, a transmission method includes a step of receiving a plurality of broadcast signals each composed of a plurality of segments, and configuring the broadcast signal for each of the plurality of received broadcast signals. Demodulating at least one predetermined segment among the plurality of segments, outputting data corresponding to the broadcast signal, and data corresponding to the plurality of broadcast signals each including a plurality of broadcast signals, Assigning to any segment of a predetermined broadcast signal different from the above, and transmitting the predetermined broadcast signal, wherein the assigning step assigns each of the data corresponding to the plurality of broadcast signals to the predetermined broadcast signal. broadcast information indicating whether allocated to any of a plurality of segments constituting, of strong bands of a plurality of segments constituting the predetermined broadcast signal Comprising assigning a predetermined segment as a segment.

According to this aspect, it is possible to provide a transmission method that effectively uses radio waves.
According to still another aspect of the present invention, a receiving method is a receiving device including receiving means for receiving at least one segment among a plurality of segments constituting a broadcast signal selected from a plurality of broadcast signals. A reception method to be executed, the step of selecting one of a plurality of broadcast signals, the step of determining whether or not the segment received in the step of receiving is reproducible, and the step of A broadcast signal that can be reproduced from a plurality of broadcast signals by searching for one segment predetermined as a strong band segment among a plurality of segments included in each of the plurality of broadcast signals when it is determined to be possible If a reproducible broadcast signal is detected in the searching step and the searching step, it is detected by the receiving means. And a segment reception step of receiving one of a plurality of segments constituting the renewable broadcast signal, for identifying a broadcast signal selected in the step of selecting before it is determined that the irreproducible in determining Storing the broadcast signal identification information, and the segment receiving step indicates which of the plurality of broadcast signals is assigned to each of the plurality of segments constituting the detected reproducible broadcast signal. Obtaining broadcast information, including: obtaining broadcast information; and determining a segment to which a broadcast signal identified by the stored broadcast signal identification information is assigned based on the obtained broadcast information. Is a strong-band segment among multiple segments that make up the detected reproducible broadcast signal. To receive one of the segments a predetermined to the receiving means, comprising the steps of acquiring a broadcast information based on the data output by the receiving means.
According to this aspect, it is possible to provide a reception method that prevents a video being viewed from being interrupted.

According to still another aspect of the present invention, the transmission program is a transmission program executed by a computer that controls the transmission device, and receives a plurality of broadcast signals each composed of a plurality of segments; For each of a plurality of received broadcast signals, demodulating at least one predetermined segment among a plurality of segments constituting the broadcast signal and outputting data corresponding to the broadcast signal; Each of the corresponding data is composed of a plurality of segments, and the computer executes the steps of assigning to any segment of a predetermined broadcast signal different from the plurality of broadcast signals, and sending the predetermined broadcast signal, The allocating step includes a plurality of segments each constituting data corresponding to a plurality of broadcast signals constituting a predetermined broadcast signal. Broadcast information indicating whether allocated in any case, it comprises assigning a predetermined segment as a segment of out strong bands of a plurality of segments constituting a predetermined broadcast signal.
According to this aspect, it is possible to provide a transmission program that effectively uses radio waves.
According to still another aspect of the present invention, the reception program is a reception program executed by a computer that controls the reception device , and the reception device constitutes a broadcast signal selected from a plurality of broadcast signals. Receiving means for receiving at least one segment of the plurality of segments, and selecting one of the plurality of broadcast signals and determining whether the received segment is reproducible in the receiving step And when determining that reproduction is impossible in the determining step, a plurality of segments included in each of the plurality of broadcast signals are searched for one segment predetermined as a strong band segment, thereby In the step of searching for a reproducible broadcast signal from the broadcast signals and the step of searching If raw possible broadcast signal is detected, and segment reception step of receiving one of a plurality of segments constituting the detected reproducible broadcast signal to the receiving steps, it is determined unreproducible in determining Storing the broadcast signal identification information for identifying the broadcast signal selected in the step of selecting before performing the process, and the segment receiving step includes a plurality of segments constituting the detected reproducible broadcast signal. Obtaining broadcast information indicating which broadcast signal of a plurality of broadcast signals is assigned to each of the segments, and a broadcast signal identified by stored broadcast signal identification information based on the obtained broadcast information Determining the allocated segment, and obtaining the broadcast information comprises detecting Step is received by the receiving means a single segment which is predetermined as a segment of out strong bands of a plurality of segments, and acquires the broadcast information based on the data output by the reception means constituting the renewable broadcast signal Including the receiving program.
According to this aspect, it is possible to provide a reception program that prevents the video being viewed from being interrupted.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

  FIG. 1 is a diagram showing an outline of a broadcasting system in an embodiment of the present invention. The broadcast system includes a broadcast device 400 that transmits a broadcast signal of terrestrial digital broadcast (hereinafter referred to as “terrestrial digital broadcast signal”), a transmission device 100, and the mobile phone 1. Broadcast apparatus 400 is installed in a terrestrial digital broadcast station, and transmits a terrestrial digital broadcast signal from antenna 401. The transmission apparatus 100 has a gap filler function, receives a terrestrial digital broadcast signal transmitted from the broadcast apparatus 400, includes a part of the received broadcast signal, and has the same segment structure as the terrestrial digital broadcast signal transmitted by the broadcast apparatus 400 Generate a new broadcast signal and send it underground. Here, a new broadcast signal transmitted from the transmission device 100 to the basement is referred to as a gap filler broadcast signal. When the mobile phone 1 is located on the ground, the mobile phone 1 receives and displays the terrestrial digital broadcast signal transmitted from the broadcast device 400, but receives the gap filler broadcast signal transmitted from the transmitter 100 when located on the underground. The frequency of the broadcast signal transmitted by the transmission device 100 in the basement may be the same as or different from the frequency of the broadcast signal transmitted by the broadcast device 400.

  In addition, although the example which installs the transmission apparatus 100 in order to transmit a gap filler broadcast signal to the underground which cannot receive a terrestrial digital broadcast signal here is demonstrated, if it is a place which cannot receive a terrestrial digital broadcast signal, for example, It may be in a building or in a mountainous area. In addition, when the frequency of the gap filler broadcast signal transmitted by the transmission apparatus 100 is different from the frequency of the terrestrial digital broadcast signal transmitted by the broadcast apparatus 400, the transmission apparatus 100 is capable of receiving the terrestrial digital broadcast signal. You may make it install in this area. The specific area is, for example, a store, a park, the inside of a vehicle such as a train, or the like.

  FIG. 2 is a block diagram illustrating an example of a functional outline of the transmission apparatus according to the present embodiment. Referring to FIG. 2, transmitting apparatus 100 is connected to antennas 101A to 112A, receives a terrestrial digital broadcast signal, and outputs a demodulated signal obtained by demodulating the first receiving unit 101 and a second receiving unit. Unit 102, third receiver 103,..., Twelfth receiver 112, and demodulated signals output from first receiver 101 to twelfth receiver 112, a new broadcast signal (gap filler broadcast signal) is generated. A combining unit 121 to be generated, a modulating unit 123 that modulates the gap filler broadcast signal generated by the combining unit, and a transmitting unit 125 that transmits the modulated gap filler broadcast signal from the antenna 127 are included.

  The first receiver 101 to the twelfth receiver 112 receive a plurality of terrestrial digital broadcast signals having different frequency bands. Here, an example is shown in which the transmission apparatus 100 receives digital terrestrial broadcast signals transmitted from 12 broadcast apparatuses 400 respectively provided in 12 broadcast stations. The terrestrial digital broadcast signals transmitted by the twelve broadcast apparatuses 400 have different frequency bands. A predetermined frequency band is assigned to each of the 12 broadcast stations, and each of the broadcast apparatuses 400 of the 12 broadcast stations transmits a broadcast signal of the predetermined frequency band. Here, the frequency band assigned to each of the 12 broadcast stations is referred to as a channel, and the first to twelfth channels are assigned to the first to twelfth broadcast stations. Further, each of the first to twelfth channels is identified by a channel number (broadcast signal identification information) assigned thereto. The terrestrial digital broadcast signal transmitted by each of the 12 broadcast apparatuses 400 includes 13 segments obtained by dividing the frequency band into 13. The segment is obtained by dividing the channel of the terrestrial digital broadcast signal into a plurality of frequency bands. The first receiving unit 101 to the twelfth receiving unit 112 have the same functions except for the frequency band (channel) of the received digital broadcast signal. Therefore, the first receiving unit 101 will be described as an example here.

  FIG. 3 is a block unit showing a detailed configuration of the first receiving unit. Referring to FIG. 3, first receiving section 101 includes tuner 131 connected to antenna 101A, demodulating section 133 that demodulates a broadcast signal received by the tuner, and data (demodulated signal) obtained by demodulation. And an extracting unit 135 for extracting a predetermined segment from the inside.

  The tuner 131 is connected to the antenna 101A, and receives a terrestrial digital broadcast signal received by the antenna 101A. The terrestrial digital broadcast signal is a high frequency digital modulation signal including video data and audio data. The tuner 131 extracts a high-frequency digital modulation signal of a predetermined channel from 12 channels (frequency bands) determined in advance for each of the 12 broadcasting stations from the high-frequency digital modulation signal input from the antenna 101A. To 133.

  The demodulation unit 133 includes a deinterleave circuit and an error correction circuit, demodulates the high-frequency digital modulation signal input from the tuner 131, and outputs data corresponding to the terrestrial digital broadcast signal received by the tuner 131 to the extraction unit 135. To do. The extraction unit 135 extracts predetermined segment data from the data corresponding to the terrestrial digital broadcast signal and outputs the data to the synthesis unit 121. The extracting unit 135 extracts data of a strong band segment that is predetermined as a segment that can be partially received in the terrestrial digital broadcast signal from among the 13 segment data included in the data corresponding to the terrestrial digital broadcast signal.

  The tuner 131 may receive a predetermined segment of the terrestrial digital broadcast signal using, for example, a band pass filter. In this case, the extraction unit 135 is unnecessary, and the tuner 131 receives a frequency band assigned to a predetermined segment among the 13 segments constituting the terrestrial digital broadcast signal.

  Returning to FIG. 2, the first reception unit 101 to the twelfth reception unit 112 receive the terrestrial digital broadcast signals transmitted by the broadcast apparatuses 400 of the 12 broadcast stations. In other words, the first receiver 101 to the twelfth receiver 112 receive different channels of the terrestrial digital broadcast signal. The synthesizer 121 receives data corresponding to a predetermined segment of the terrestrial digital broadcast signal from the first receiver 101 to the twelfth receiver 112, respectively. For example, when the first receiving unit 101 receives the terrestrial digital broadcast signal of the first channel, the synthesizing unit 121 has a strong band among the 13 segments constituting the terrestrial digital broadcast signal of the first channel from the first receiving unit 101. When the demodulated segment data is input and the second receiving unit 102 receives the terrestrial digital broadcast signal of the second channel, the synthesizer 121 configures the terrestrial digital broadcast signal of the second channel from the second receiving unit 102. When data obtained by demodulating a strong band segment among the 13 segments is input, and the twelfth receiving unit 112 receives a terrestrial digital broadcast signal of the twelfth channel, the synthesizer 121 receives the twelfth receiving unit 112 through the twelfth channel. Data obtained by demodulating the strong band segment among the 13 segments constituting the digital terrestrial broadcast signal of the channel It is.

  Here, the first receiving unit 101 to the 12th receiving unit 112 receive digital terrestrial broadcast signals transmitted from the broadcasting apparatuses 400 of 12 broadcasting stations, but the number of broadcasting stations is Without limitation, at least one is sufficient. The first receiving unit 101 to the twelfth receiving unit 112 may be provided in a number corresponding to the number of terrestrial digital broadcast signals (the number of channels to be received) transmitted from the broadcasting device 400 of the broadcasting station.

  The combining unit 121 generates data for generating a gap filler broadcast signal including 13 segments, and outputs the generated gap filler broadcast signal data to the modulation unit 123. The synthesizer 121 assigns broadcast information to the strong band segment of the gap filler broadcast signal. The broadcast information defines the association between information for identifying the terrestrial digital broadcast signal received by the first receiver 101 to the twelfth receiver 112 and the 13 segments constituting the gap filler broadcast signal. The information (broadcast identification information) for identifying the terrestrial digital broadcast signal is, for example, information (channel number) for identifying the broadcast station name and the frequency band assigned to the broadcast station. Here, an example in which a channel number is used as information (broadcast identification information) for identifying a terrestrial digital broadcast signal is shown.

  The broadcast information is, for example, data corresponding to the first channel terrestrial digital broadcast signal output from the first receiver 101 when the first receiver 101 receives the terrestrial digital broadcast signal of the first channel. Is assigned to the first segment, the channel number for identifying the first channel is associated with the first segment. The broadcast information includes channel numbers for identifying terrestrial digital broadcast signals received by all of the first receiving unit 101 through the twelfth receiving unit 112 and data output from the first receiving unit 101 through the twelfth receiving unit 112. Associate with the allocated segment.

  Broadcast information includes program specific information (PSI: Program Specific Information), program arrangement information (SI: Service Information), network-related setting management information (NIT: Network Information Table) included in a terrestrial digital broadcast signal, and broadcasters. Information (SDT: Service Description Table) may be included.

  Here, the data corresponding to the terrestrial digital broadcast signal output from each of the first receiver 101 to the twelfth receiver 112 is associated with any of the 13 segments constituting the gap filler broadcast signal. The unique data may be assigned to any of the 13 segments constituting the gap filler broadcast signal generated by the synthesis unit 121, regardless of the terrestrial digital broadcast signal transmitted by the apparatus 400. For example, when the transmission apparatus 100 is installed in a store, broadcast video data uniquely created by the store is assigned to any of 13 segments.

  When the mobile phone 1 searches for a gap filler broadcast signal, the mobile phone 1 first receives a strong band segment among the 13 segments constituting the gap filler broadcast signal. Since the mobile phone 1 searches for the gap filler broadcast signal and the segment of the gap filler broadcast signal received first includes broadcast information, the channel assigned to each of the 13 segments constituting the gap filler broadcast signal is determined. Can grasp immediately. Therefore, the mobile phone 1 can immediately determine to which segment of the gap filler broadcast signal the data corresponding to the desired terrestrial digital broadcast signal is assigned. Here, the combining unit 121 assigns broadcast information to the strong band segment of the gap filler broadcast signal, but the broadcast information may be assigned to an arbitrary segment of the gap filler broadcast signal. If the segment to which the broadcast information is assigned is determined in advance, the mobile phone 1 detects the strong band after searching for the gap filler broadcast signal, so the broadcast information is immediately assigned from the relative position from the strong band segment. Segments can be received.

  The transmission unit 125 is connected to the antenna 127 and transmits the gap filler broadcast signal modulated by the modulation unit 123 from the antenna 127.

  FIG. 4 is a perspective view showing an appearance of the mobile phone according to the embodiment of the present invention. Referring to FIG. 4, mobile phone 1 includes an operation side portion 3 and a display side portion 2. An operation key 14 such as a numeric keypad and a call key and a microphone 13 are arranged on the inner side surface of the operation side portion 3, and a camera 24 described later is arranged on the outer side surface opposite to the inner side surface. A liquid crystal display device (LCD) 16 and a first speaker 11 are disposed on the inner side surface of the display side portion 2. A second speaker 12 is disposed on the side surface of the display side portion 2. Although an example in which the mobile phone 1 includes the LCD 16 is shown here, an organic EL (ElectroLuminescence) display may be used instead of the LCD 16.

  The operation side unit 3 and the display side unit 2 are rotatably connected by a hinge mechanism, and the operation side unit 3 and the display side unit 2 can be opened and closed. When the mobile phone 1 is folded and the operation side portion 3 and the display side portion 2 are in the closed state, the state of the mobile phone 1 is the closed style, and the mobile phone 1 is opened to open the operation side portion 3 and the display side portion. The state of the mobile phone 1 when 2 is in the open state is the open style.

  FIG. 5 is a functional block diagram illustrating an example of functions of the mobile phone. Referring to FIG. 5, mobile phone 1 includes a control unit 21 for controlling the entire mobile phone 1, a radio circuit 22 connected to an antenna 22A, a codec unit 28 for processing audio data, Each of the microphone 13 and the first speaker 11 connected to the codec unit 28, the tuner 23 connected to the antenna 22A, the AV decoder 29, the camera 24, the operation unit 25 that receives input of a user operation, and the LCD 16 A display control unit 30 for controlling the display of the display, a RAM (Random Access Memory) 31 used as a work area of the control unit 21, and a flash ROM (Flush Read) for storing a program executed by the control unit 21 Only Memory) 32, vibration unit 26, card interface ( I / F) 27 and an external communication connection terminal 33 as a serial interface.

  The radio circuit 22 receives the radio signal received by the antenna 22 </ b> A and outputs an audio signal obtained by demodulating the radio signal to the codec unit 28. The radio circuit 22 receives the audio signal from the codec unit 28 and outputs a radio signal obtained by modulating the audio signal to the antenna 22A. The codec unit 28 decodes the audio signal input from the radio circuit 22, converts the decoded digital audio signal to analog, amplifies it, and outputs it to the first speaker 11. The codec unit 28 receives an analog audio signal from the microphone 13, converts the audio signal to digital, encodes it, and outputs the encoded audio signal to the radio circuit 22.

  The tuner 23 is connected to the antenna 22A, and receives a broadcast signal received by the antenna 22A. Broadcast signals received by the tuner 23 include digital broadcast signals and gap filler broadcast signals. The broadcast signal is a high frequency digital modulation signal including video data and audio data. The tuner 23 extracts a signal having a specific frequency from the high frequency digital modulation signal input from the antenna 22A. Further, the tuner 23 includes a deinterleave circuit and an error correction circuit, demodulates the extracted high frequency digital modulation signal of a specific frequency, and outputs code data obtained by the demodulation to the AV decoder 29. The AV decoder 29 includes a video decoder and an audio decoder, decodes the code data input from the tuner 23 to generate a video signal and an audio signal, and performs D / A (digital / analog) conversion on the video signal. The audio signal is output to the display control unit 30 and is D / A converted and provided to the second speaker 12. Although an example of receiving and reproducing a terrestrial digital broadcast signal is shown here, an analog television broadcast signal may be received and reproduced. Further, instead of the television broadcast or in addition to the television broadcast, the broadcast radio wave of the radio broadcast may be received and reproduced.

  The display control unit 30 is controlled by the control unit 21 and controls the LCD 16 according to an instruction input from the control unit 21 to display an image on the LCD 16. The image displayed on the LCD 16 includes a moving image and a still image.

  The camera 24 includes a lens and a photoelectric conversion element such as a CMOS (Complementary Metal Oxide Semiconductor) sensor, and focuses light collected by the lens on a CMOS sensor. The CMOS sensor photoelectrically converts the received light to convert image data. Output to the control unit 21. The camera 24 is controlled by the control unit 21, starts imaging in response to an instruction from the control unit 21, and outputs the obtained still image data or moving image data to the control unit 21. The camera 24 includes an image processing circuit that executes image processing for improving the image quality of photoelectrically converted image data, and an A / D conversion circuit that converts image data from analog to digital. The control unit 21 outputs the still image data or moving image data output from the camera 24 to the display control unit 30 and displays the still image data or moving image data on the LCD 16 or encodes the still image data or moving image data using the compression encoding method, and the flash ROM 32. Or it memorize | stores in the memory card 27A with which card | curd I / F27 was mounted | worn. Thereby, the video content is recorded on the memory card 27A.

  The operation unit 25 includes an operation key 14 and a lamp 25A. The operation key 14 receives an input of an operation by the user and outputs the received operation to the control unit 21. The lamp 25A emits light under the control of the control unit 21.

  A removable memory card 27A is attached to the card I / F 27. The memory card 27A is, for example, a CompactFlash, a SmartMedia (registered trademark), an SD (Secure Digital) memory card, a memory stick, an MMC (MultiMedia Card), an xD picture card, or the like.

  The control unit 21 can access the memory card 27A via the card I / F 27. When video content is recorded on the memory card 27A, the control unit 21 reads the video content from the memory card 27A and outputs code data included in the video content to the AV decoder 29. The AV decoder 29 decodes the code data input from the control unit 21 to generate a video signal and an audio signal, D / A (digital / analog) converts the video signal, and outputs the video signal to the display control unit 30. The signal is D / A converted and applied to the second speaker 12. Thereby, the video content is reproduced.

Here, an example in which a program to be executed by the control unit 21 is stored in the flash ROM 32 will be described. However, the program is stored in the memory card 27A, the program is read from the memory card 27A, and the control unit 21 is read out. May be executed. The recording medium for storing the program is not limited to the memory card 27A, but may be a flexible disk, a cassette tape, an optical disk (CD-ROM (Compact Disc).
-ROM) / MO (Magnetic Optical Disc) / MD (Mini Disc) / DVD (Digital Versatile Disc)), a semiconductor memory such as an optical card, a mask ROM, and an EPROM. Alternatively, the mobile phone 1 may be connected to the Internet via the wireless circuit 22, and a program may be downloaded from a computer connected to the Internet and executed by the control unit 21. The program here includes not only a program directly executable by the control unit 21 but also a source program, a compressed program, an encrypted program, and the like.

  FIG. 6 is a diagram showing an example of the segment structure of each of the first to twelfth channel terrestrial digital broadcast signals. Referring to FIG. 6, terrestrial digital broadcast signals 201 to 212 of the first channel (ch) to the twelfth channel are transmitted as signals in a frequency band of 64 MHz, and this frequency band is divided into 13 segments. Here, when the 64 MHz frequency band is divided into 13, they are referred to as a first segment, a second segment,.

  Of the 13 segments, the segment including the center frequency of the terrestrial digital broadcast signal is a strong band segment. Each of the broadcast signals 201 to 212 of the first channel (ch) to the twelfth channel can modulate the strong band segments 231 to 242 and the segments other than the strong band with different modulation schemes. Therefore, it is possible to partially receive the strong band segments 231 to 242. Here, in each of the terrestrial digital broadcast signals 201 to 212, the strong band segments 201 to 212 are modulated by QPSK (Quadrature Phase Shift Keying), and the non-strong band segments are modulated by OFDM (Orthogonal Frequency Division Multiplexing). Shall.

  FIG. 7 is a diagram illustrating an example of a segment structure of a gap filler broadcast signal. Referring to FIG. 7, gap filler broadcast signal 300 is transmitted as a signal of a frequency band of 64 MHz, and this frequency band is composed of first segment 231 to thirteenth segment, and the terrestrial digital broadcast signal shown in FIG. The segment structure is the same. Therefore, the tuner 23 of the mobile phone 1 can receive the gap filler broadcast signal in addition to the terrestrial digital broadcast signal. The seventh segment 301 at the center of the gap filler broadcast signal 300 is a strong band segment. In the gap filler broadcast signal 300, the data corresponding to the strong band segments 231 to 236 of the first to sixth channels are allocated to the first to sixth segments, the broadcast information is allocated to the seventh segment 301, the first Data data corresponding to the strong band segments 237 to 242 of the seventh to twelfth channels are allocated to the seventh to twelfth segments, respectively.

  FIG. 8 is a flowchart illustrating an example of the flow of gap filler processing executed by the transmission apparatus. Referring to FIG. 8, transmitting apparatus 100 receives a terrestrial digital broadcast signal of a plurality of channels (step S101). Here, the first to twelfth receiving units 101 to 112 receive the terrestrial digital broadcast signals of the first to twelfth channels, respectively. Then, the terrestrial digital broadcast signal of a plurality of channels is demodulated (step S102). Here, the first to twelfth receiving units 101 to 112 demodulate the terrestrial digital broadcast signals of the first to twelfth channels, respectively. Thereby, data corresponding to each of the terrestrial digital broadcast signals of the first to twelfth channels is obtained. Further, segment data of a strong band is extracted for each of a plurality of channels (step S103). Here, the first to twelfth receiving units 101 to 112 correspond to the strong band segments among the 13 segments constituting each terrestrial digital broadcast signal from the data corresponding to the terrestrial digital broadcast signals of the first to twelfth channels, respectively. Data to be extracted.

  Next, broadcast information is generated (step S104). Specifically, broadcast information in which the first to twelfth channels and 13 segments constituting the gap filler broadcast signal are associated is generated. Here, broadcast information is generated in which the channel numbers of the first to sixth channels are associated with the first to sixth segments, respectively, and the channel numbers of the seventh to twelfth channels are associated with the eighth to thirteenth segments. .

  Next, the broadcast information is assigned to the strong band segment of the gap filler broadcast signal (step S105). Here, broadcast information is assigned to the seventh segment. In step S103, the data of the strong band segment extracted for each of the plurality of channels is assigned to the remaining segments of the gap filler broadcast signal. This allocation follows the broadcast information generated in step S104. Here, data corresponding to the strong band segments 231 to 236 of the first to sixth channels are assigned to the first to seventh segments of the gap filler broadcast signal, respectively, and the strong band segments 237 to 237 of the seventh to twelfth channels are assigned. Data corresponding to 242 is assigned to the seventh to twelfth segments of the gap filler broadcast signal.

  Then, the gap filler broadcast signal to which data and broadcast information corresponding to the first to twelfth channels are assigned is modulated (step S107), and the modulated gap filler broadcast signal is transmitted (step S108).

  FIG. 9 is a flowchart showing an exemplary flow of a broadcast signal reception process. This broadcast signal reception process is a process executed by the control unit 21 when the control unit 21 of the mobile phone 1 executes a broadcast reception program. Referring to FIG. 9, channel selection is accepted (step S01). Specifically, the user operates the operation key 14 to accept an input channel number selection instruction. Then, a channel list including the accepted channel number is created and stored in the flash ROM 32 (step S02). The channel number is information for identifying the channel of the terrestrial digital broadcast signal.

  Next, the control unit 21 receives a terrestrial digital broadcast signal (step S03). Specifically, the tuner 23 is made to take out the terrestrial digital broadcast signal of the channel identified by the channel number received in step S01. As a result, the terrestrial digital broadcast signal of the channel selected in step S01 is received and demodulated. Then, it is determined whether or not the terrestrial digital broadcast signal can be reproduced (step S04). The control unit 21 compares the bit error rate of the data obtained by demodulating the terrestrial digital broadcast signal with a predetermined threshold value, and determines whether or not reproduction is possible. If reproducible, the process proceeds to step S05. If not reproducible, the process proceeds to step S06. If the terrestrial digital broadcast signal is not reproducible, it is determined that the terrestrial digital broadcast signal has moved to a place where radio waves do not reach. If the radio wave of the terrestrial digital broadcast signal does not reach, gap filler reception processing is executed in step S06. If the transmitter 100 transmits a gap filler broadcast signal in a place where radio waves of the terrestrial digital broadcast signal do not reach, the broadcast signal can be received.

  In step S05, it is determined whether an instruction to turn off the mobile phone 1 has been received. If an instruction to turn off the power is accepted, the process is terminated; otherwise, the process proceeds to step S03. The instruction to turn off the power is assigned to the operation key 14 in response to the instruction to stop the reception of the broadcast signal in addition to the case where the user detects pressing of the power OFF key assigned to the operation key 14 in advance. This includes a case where the pressed key is detected, or a case where the voltage of the secondary battery which is the power source of the mobile phone 1 is lowered.

  After the gap filler reception process executed in step S06, it is determined in step S07 whether the result of the gap filler reception process is an error. Although details of the gap filler reception process will be described later, the process is a process of receiving a gap filler broadcast signal transmitted by the transmission device 100. If the gap filler broadcast signal cannot be received, the processing result is an error. If the execution result of the gap filler reception process is an error, the process proceeds to step S07; otherwise, the process returns to step S02. In step S07, an error message is displayed on LCD 16, and the process ends. The error message is, for example, a message such as “Cannot receive broadcast signal”.

  FIG. 10 is a flowchart illustrating an example of the flow of gap filler reception processing. The gap filler reception process is a process executed in step S06 of FIG. Referring to FIG. 10, control unit 21 searches for a gap filler broadcast signal transmitted by transmitting apparatus 100 (step S11). When the frequency band of the gap filler broadcast signal is determined in advance, the tuner 23 receives the gap filler broadcast signal in that frequency band. Otherwise, the frequency is changed in order, and the tuner 23 is made to receive at a frequency different from the frequency received so far. It is determined whether a refillable gap filler broadcast signal has been received by the tuner 23 (step S12). If a gap filler broadcast signal reproducible by tuner 23 is received, the process proceeds to step S13, and if not, the process proceeds to step S20. Whether or not the data can be reproduced is determined to be reproducible if the bit error rate of the demodulated data is lower than a predetermined threshold value. In step S20, “error” is set as the return value, and the process returns to the broadcast signal reception process.

  In step S13, the gap filler broadcast signal transmitted by the transmission device 100 is received. And broadcast information is acquired (step S14). Broadcast information is acquired from a segment of a strong band among the 13 segments constituting the gap filler broadcast signal. And it is judged whether the terrestrial digital broadcast signal received previously exists in a gap filler broadcast signal (step S15). The channel number of the terrestrial digital broadcast signal received previously is stored as a channel list in the flash ROM 32 in step S02 of the broadcast reception process of FIG. Therefore, it is determined whether or not the same channel number as the channel number included in the channel list is included in the broadcast information acquired in step S14. If the same channel number as the channel number stored in the channel list is included in the broadcast information, it is determined that the previously received digital terrestrial broadcast signal exists in the gap filler broadcast signal, and the process proceeds to step S16. If not, the process proceeds to step S17.

  In step S16, the segment to which the previously received digital terrestrial broadcast signal is assigned is set as the segment to be received. Specifically, the segment associated with the channel number stored in the channel list and the broadcast information is set as a segment to be received, and the process proceeds to step S18. In step S18, a segment reception process is executed, and the process proceeds to step S19. In step S19, the process returns to the broadcast signal reception process. Thereby, among the gap filler broadcast signals, the segment to which the previously received terrestrial digital broadcast signal is assigned is received. For this reason, since the data corresponding to the terrestrial digital broadcast signal viewed on the ground is received underground, the user does not need to select a channel number.

  In step S17, a segment to which a broadcast signal similar to the previously received digital terrestrial broadcast signal is assigned is set as a received segment. If the channel list and the broadcast information include program identification information, program arrangement information, network related setting management information or broadcaster information, the channel list and the broadcast information are compared with each other, and the channel list is compared. It is determined that a segment associated with broadcast information and information similar to the information included corresponds to a broadcast signal similar to the terrestrial digital broadcast signal received previously. Information similarity is determined to be similar when, for example, the program genre is the same and the broadcasters are the same.

  Then, from among the 13 segments constituting the gap filler broadcast signal, a segment to which a broadcast signal similar to the previously received terrestrial digital broadcast signal is assigned is set as a received segment, and the process proceeds to step S18. . As a result, among the 13 segments constituting the gap filler broadcast signal, a segment to which transmission / reception similar to the terrestrial digital broadcast signal received earlier is assigned is received. For this reason, since a broadcast signal similar to the terrestrial digital broadcast signal viewed on the ground is received underground, the user does not need to select a channel.

  FIG. 11 is a flowchart illustrating an example of the flow of segment reception processing. The segment reception process is a process executed in step S18 of FIG. Referring to FIG. 11, a segment set as a receiving segment among the 13 segments constituting the gap filler broadcast signal is received (step S21). Specifically, the tuner 23 is caused to receive a gap filler broadcast signal having a set segment frequency. A video included in the data corresponding to the gap filler broadcast signal of the segment set as the segment to be received is displayed on the LCD 16 and sound is output from the first speaker 11 or the second speaker 12. Thereby, the same or similar data as the data corresponding to the terrestrial digital broadcast signal of the channel identified by the previously selected channel number can be displayed or output as audio. As a result, since the video of the digital broadcast signal received on the ground is continuously displayed on the LCD 16, the user does not need to select a channel in order to receive the gap filler broadcast signal.

  In the next step S22, as in step S05 of FIG. 9, it is determined whether or not an instruction to turn off the power has been received. If an instruction to turn off the power is accepted, the process is terminated; otherwise, the process proceeds to step S23.

  In step S23, it is determined whether a channel change instruction for changing the channel number has been received. If the user presses a channel selection key assigned in advance to the operation key 14, a channel change instruction is accepted. If a channel change instruction is accepted, the process proceeds to step S24; otherwise, the process proceeds to step S25. Here, the changeable channel number is one of the channel numbers defined in the broadcast information acquired in step S10 of FIG.

  In step S24, the segment associated with the changed channel number and the broadcast information is set as the segment to be received, and the process returns to step S21. Thereby, the broadcast signal of the segment linked | related with the channel number after a change and broadcast information is received (step S21).

  In step S25, as in step S04 of FIG. 9, it is determined whether or not the gap filler broadcast signal can be reproduced. If reproduction is possible, the process returns to step S21, and reception of the received segment is continued. However, if playback is not possible, the process proceeds to step S26. If the gap filler broadcast signal is not reproducible, it is highly likely that the user has moved to a place where the terrestrial digital broadcast signal can be received. For this reason, the terrestrial digital broadcast signal is received in the processing after step S16.

  In step S26, it is determined whether the segment received from the segment set in step S16 of FIG. 10 has been changed. If the received segment has been changed, the process proceeds to step S27, and if not changed, the process proceeds to step S30. After the gap filler broadcast signal is received, the segment to which the terrestrial digital broadcast signal previously received in step S16 in FIG. 10 is assigned is set as the segment to be received. Judge whether or not. When the change is made by the user's intention (step S23), and when the same broadcast signal as the terrestrial digital broadcast signal received earlier is not present in the gap filler broadcast signal, the mobile phone 1 performs a similar broadcast. And changing to a signal (step S17 in FIG. 10).

  In step S27, it is determined whether there is a digital terrestrial broadcast signal identical to the broadcast signal received after the segment is changed. Specifically, it is determined whether there is a terrestrial digital broadcast signal of the channel identified by the channel number associated with the segment after the change and the broadcast information. If it exists, the process proceeds to step S28; otherwise, the process proceeds to step S29. In step S28, the channel number associated with the changed segment and the broadcast information is selected as a channel number for identifying the channel of the next terrestrial digital broadcast signal to be received, and the process returns to the broadcast signal reception process. In step S30, the channel number stored in the channel list is selected as the channel number for identifying the channel of the next terrestrial digital broadcast signal to be received, and the process returns to the broadcast signal reception process. As a result, the digital terrestrial broadcast signal identified by the channel number associated with the broadcast information and the segment received among the plurality of segments constituting the gap filler broadcast signal is received, so the same digital terrestrial broadcast signal is continued. Can be received.

  On the other hand, in step S29, as in step S17 of FIG. 10, the channel number of the information similar to the information associated with the changed segment and the broadcast information is identified, and the channel of the terrestrial digital broadcast signal to be received next is identified. The channel number is selected to return to the broadcast signal reception process. Thereby, the digital terrestrial broadcast signal of the channel of the information similar to the information linked | related with the segment and broadcast information which were received among the some segments which comprise a gap filler broadcast signal is received. For this reason, since the terrestrial digital broadcast signal similar to the broadcast signal viewed in the basement is received, the user does not need to select a channel.

  As described above, the transmitting apparatus 100 according to the present embodiment receives the terrestrial digital broadcast signals of the first to twelfth channels by the first receiving unit 101 to the twelfth receiving unit 112, respectively, and the first receiving unit 101 to A gap filler broadcast signal in which each of the strong band segment data output by each of the twelfth receivers 112 is assigned to any of the 13 segments is generated and transmitted. For this reason, the mobile phone 1 as a receiving device that receives the terrestrial digital broadcast signal can receive the gap filler broadcast signal without changing the tuner 23 provided therein. Further, since each of the strong band segments of the terrestrial digital broadcast signal of the first channel to the twelfth channel is assigned to each of the 12 segments other than the strong band of the gap filler broadcast signal, the radio wave can be used effectively. As a result, it is possible to provide a transmission device that effectively uses radio waves.

  The broadcast information indicating which of the 12 segments other than the strong band of the gap filler broadcast signal each of the strong band segments of the first to twelfth channel broadcast signals is the strong band of the gap filler broadcast signal. Assigned to the segment. For this reason, the mobile phone 1 that receives the gap filler broadcast signal immediately determines which of the 13th segment constituting the gap filler broadcast signal is assigned to the 1st to 12th channel broadcast signals. Can do.

  Also, the cellular phone 1 determines whether or not the received terrestrial digital broadcast signal is reproducible, and if it is determined that the replay is impossible, the mobile phone 1 searches for a reproducible gap filler broadcast signal. When a reproducible gap filler broadcast signal is detected, any of the 13 segments constituting the reproducible gap filler broadcast signal is received. Also, it is determined whether or not the gap filler broadcast signal can be reproduced. If it is determined that the gap filler broadcast signal cannot be reproduced, a searchable terrestrial digital broadcast signal is searched. When a reproducible terrestrial digital broadcast signal is detected, the reproducible terrestrial digital broadcast signal is received. For this reason, when one of the terrestrial digital broadcast signal or the gap filler broadcast signal being received becomes unreproducible, the other is replayed, and the video is not interrupted.

  Further, when receiving the terrestrial digital broadcast signal, the mobile phone 1 stores a channel number for identifying the channel of the terrestrial digital broadcast signal in the channel list. When the terrestrial digital broadcast signal cannot be reproduced and a gap filler broadcast signal is received, broadcast information is acquired from the strong band segment. Then, a segment associated with the channel number stored in the channel list and broadcast information is determined and received. For this reason, the digital terrestrial broadcast signal which became impossible to reproduce can be continuously reproduced. As a result, the user does not need to select a channel.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a figure which shows the outline of the broadcast system in embodiment of this invention. It is a block diagram which shows an example of the function outline | summary of the transmitter in this Embodiment. It is a block part which shows the detailed structure of a 1st receiving part. It is a perspective view which shows the external appearance of a mobile telephone. It is a functional block diagram which shows an example of the function of a mobile telephone. It is a figure which shows an example of the segment structure of each terrestrial digital broadcast signal of 1st channel-12th channel. It is a figure which shows an example of the segment structure of a gap filler broadcast signal. It is a flowchart which shows an example of the flow of the gap filler process performed with a transmitter. It is a flowchart which shows an example of the flow of a broadcast signal reception process. It is a flowchart which shows an example of the flow of a gap filler reception process. It is a flowchart which shows an example of the flow of a segment reception process.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Mobile phone, 2 Display side part, 3 Operation side part, 11 1st speaker, 12 2nd speaker, 13 Microphone, 14 Operation key, 16 LCD16, 21 Control part, 22 Radio circuit, 22A Antenna, 23 Tuner, 24 Camera , 25 operation unit, 25A lamp, 26 vibration unit, 27 card I / F, 27A memory card, 28 codec unit, 29 AV decoder, 30 display control unit, 31 RAM, 32 flash ROM, 33 external communication connection terminal, 100 transmission Device 101-112 first receiver-twelfth receiver, 101A-112A, 127 antenna, 121 combiner, 123 modulator, 125 transmitter, 131 tuner, 133 demodulator, 135 extractor, 201-212 broadcast signal 231 to 242 Strong band segment 300 Yappufira broadcast signal, 400 a broadcast device, 401 an antenna.

Claims (6)

Receiving one selected from a plurality of broadcast signals, demodulating at least one predetermined segment from a plurality of segments constituting the received broadcast signal, and selecting the selected broadcast signal Receiving means for outputting corresponding data;
Broadcast signal generating means for allocating data corresponding to the selected broadcast signal output by the receiving means to any one segment of a predetermined broadcast signal different from the plurality of broadcast signals. ,
Sending means for sending the predetermined broadcast signal,
The broadcast signal generation unit is configured to transmit broadcast information indicating to which of the plurality of segments constituting the predetermined broadcast signal data corresponding to the selected broadcast signal output from the reception unit is the predetermined A transmission apparatus, comprising: broadcast information generating means for assigning to a segment predetermined as a strong band segment among the plurality of segments constituting the broadcast signal. Receiving means for receiving at least one segment among a plurality of segments constituting a broadcast signal selected from a plurality of broadcast signals;
Selecting means for selecting one of the plurality of broadcast signals and causing the receiving means to receive;
Determining means for determining whether the segment received by the receiving means is reproducible;
The plurality of broadcast signals are searched by searching for one segment predetermined as a strong band segment among the plurality of segments included in each of the plurality of broadcast signals when the determination unit determines that the reproduction is impossible. Search means for searching for a reproducible broadcast signal,
A segment receiving means for causing the receiving means to receive one of a plurality of segments constituting the detected reproducible broadcast signal when a reproducible broadcast signal is detected by the search means;
Storage means for storing broadcast signal identification information for identifying the broadcast signal selected by the selection means before being determined to be unplayable by the determination means ;
The segment receiving means acquires broadcast information indicating which broadcast signal of the plurality of broadcast signals is allocated to each of a plurality of segments constituting the detected reproducible broadcast signal; and ,
Segment determining means for determining a segment to which a broadcast signal identified by the stored broadcast signal identification information is assigned based on the acquired broadcast information;
The broadcast information acquisition means causes the reception means to receive one segment predetermined as a strong band segment among the plurality of segments constituting the detected reproducible broadcast signal, and the reception means outputs A receiving device that acquires the broadcast information based on data to be received. Receiving a plurality of broadcast signals each composed of a plurality of segments;
Demodulating at least one predetermined segment of the plurality of segments constituting the broadcast signal for each of the received plurality of broadcast signals, and outputting data corresponding to the broadcast signal;
Assigning each of the data corresponding to the plurality of broadcast signals to a segment of a predetermined broadcast signal different from the plurality of broadcast signals, each of which is composed of a plurality of segments;
Sending the predetermined broadcast signal, and
In the assigning step, broadcast information indicating to which of the plurality of segments constituting the predetermined broadcast signal each of data corresponding to the plurality of broadcast signals is assigned to the plurality of segments constituting the predetermined broadcast signal. A transmission method including a step of assigning a predetermined segment as a strong band segment . A reception method executed by a receiving device including a receiving unit that receives at least one segment among a plurality of segments constituting a broadcast signal selected from a plurality of broadcast signals,
Selecting one of the plurality of broadcast signals;
Determining whether the received segment is reproducible in the receiving step;
When it is determined in the determining step that reproduction is impossible, the plurality of broadcasts are searched by searching for one segment predetermined as a strong band segment among the plurality of segments included in each of the plurality of broadcast signals. Searching for a reproducible broadcast signal from the signals;
A segment receiving step of causing the receiving means to receive one of a plurality of segments constituting the detected reproducible broadcast signal when a reproducible broadcast signal is detected in the searching step;
Storing broadcast signal identification information for identifying the broadcast signal selected in the selecting step before it is determined that reproduction is not possible in the determining step,
The segment receiving step acquires broadcast information indicating which broadcast signal of the plurality of broadcast signals is assigned to each of a plurality of segments constituting the detected reproducible broadcast signal;
Determining a segment to which a broadcast signal identified by the stored broadcast signal identification information is assigned based on the acquired broadcast information,
The step of acquiring the broadcast information causes the receiving means to receive one segment predetermined as a strong band segment among the plurality of segments constituting the detected reproducible broadcast signal, and the receiving means A receiving method including the step of acquiring the broadcast information based on the data output by. A transmission program executed by a computer that controls the transmission device,
Receiving a plurality of broadcast signals each composed of a plurality of segments;
Demodulating at least one predetermined segment of the plurality of segments constituting the broadcast signal for each of the received plurality of broadcast signals, and outputting data corresponding to the broadcast signal;
Assigning each of the data corresponding to the plurality of broadcast signals to a segment of a predetermined broadcast signal different from the plurality of broadcast signals, each of which is composed of a plurality of segments;
Sending the predetermined broadcast signal to a computer,
In the assigning step, broadcast information indicating to which of the plurality of segments constituting the predetermined broadcast signal each of data corresponding to the plurality of broadcast signals is assigned to the plurality of segments constituting the predetermined broadcast signal. A transmission program comprising a step of assigning a predetermined segment as a strong band segment . A receiving program executed by a computer that controls the receiving device,
The receiving device includes receiving means for receiving at least one segment among a plurality of segments constituting a broadcast signal selected from a plurality of broadcast signals ,
Selecting one of the plurality of broadcast signals;
Determining whether the received segment is reproducible in the receiving step;
When it is determined in the determining step that reproduction is impossible, the plurality of broadcasts are searched by searching for one segment predetermined as a strong band segment among the plurality of segments included in each of the plurality of broadcast signals. Searching for a reproducible broadcast signal from the signals;
A segment receiving step of causing the receiving step to receive one of a plurality of segments constituting the detected reproducible broadcast signal when a reproducible broadcast signal is detected in the searching step;
Storing the broadcast signal identification information for identifying the broadcast signal selected in the selecting step before it is determined that reproduction is not possible in the determining step;
The segment receiving step acquires broadcast information indicating which broadcast signal of the plurality of broadcast signals is assigned to each of a plurality of segments constituting the detected reproducible broadcast signal;
Determining a segment to which a broadcast signal identified by the stored broadcast signal identification information is assigned based on the acquired broadcast information,
The step of acquiring the broadcast information causes the receiving means to receive one segment predetermined as a strong band segment among the plurality of segments constituting the detected reproducible broadcast signal, and the receiving means A receiving program comprising the step of acquiring the broadcast information based on the data output by.

Images