JP4553039B2 - Digital radio receiver and time display method - Google Patents

Description

  The present invention relates to a digital radio receiver and a time display method for displaying time information on a display screen when FM broadcast is received with a battery attached.

  Conventionally, a digital radio receiver capable of reserving a program by receiving DAB (Digital Audio Broadcast) including time information that has been put into practical use in accordance with European standards is known (see Patent Document 1). ).

JP-A-10-290171

  In such a digital radio receiver, time information included in the DAB is extracted and the extracted time information is displayed.

  According to the inventor's study on the time display of the digital radio receiver, as a digital broadcast, not only DAB including time information but also two-band digital radio reception capable of receiving FM broadcast not including time information Considering the machine, in order to always display the time information, after turning on the power of the digital radio receiver, starting the DAB broadcast, receiving the DAB once and acquiring the time information, the acquired time You may need to display information about.

  That is, in such a two-band digital radio receiver, even if the FM broadcast is started up after turning on the power switch of the digital radio receiver main body, the FM broadcast does not include time information. There is a possibility that it cannot be displayed.

  Therefore, in such a two-band digital radio receiver, even a listener who mainly listens to FM broadcasts must start up DAB instead of the desired FM broadcast in order to display time information. May be uncomfortable.

  According to further studies on the digital radio receiver of the present inventor, there is an increasing demand from the industry for a digital radio receiver that can reduce discomfort given to listeners who mainly listen to FM broadcasts. .

  Therefore, an object of the present invention is to provide a digital radio receiver and a time display method that can reduce discomfort given to listeners who mainly listen to FM broadcasting.

  The gist of the present invention is that “when the battery is attached to the digital radio receiver main body and the power is turned on, the band switching means is switched to receive the FM broadcast by the operation input. Received and extracted the time information included in the DAB, and the extracted time information is displayed on the display means for displaying the time information ”, the uncomfortable feeling given to listeners mainly listening to FM broadcasts It is to achieve an effect peculiar to the present application that enables mitigation.

A first aspect of the present invention is a power switch for turning on the power of the digital radio receiver body, a first receiving means for receiving the FM broadcast, a second receiving means for receiving the DA B, the first receiver A band switching means for switching between an FM broadcast reception band received by the means and a DAB reception band received by the second reception means in response to an operation input; A battery for supplying power to the first receiving means and the second receiving means in a state where it is mounted on the receiver body, and a state where the battery is mounted on the digital radio receiver body and the power is turned on for the first time. When the band switching means is switched to receive FM broadcast by the operation input, DAB is received by the second receiving means and included in DAB The time information is extracted, the extracted time information is displayed on the display means for displaying the time information , the battery is mounted on the digital radio receiver body, and the power is turned on for the second time or later. In the state, when the reception band received when the power was last turned on is FM broadcasting, the second message is displayed on the display means while displaying a message indicating that preparation for performing time display is made. The receiving means receives the DAB, extracts the time information included in the DAB, and displays the extracted time information on the display means. The display control means executes the processing, and the first receiving means receives the DAB . The digital radio receiver includes an output unit that receives an FM broadcast and outputs data of the received FM broadcast.

In the second aspect of the present invention, the reception band is switched so as to receive FM broadcasting by an operation input in a state where the battery is attached to the digital radio receiver main body and the digital radio receiver main body is turned on for the first time . In this case, the DAB receiving process for receiving the DAB, the time extracting process for extracting the time information included in the DAB received in the DAB receiving process, and the time information extracted in the time extracting process are displayed as the time information. A first time information display step for displaying on the display means, an FM broadcast reception step for receiving FM broadcast and outputting the received FM broadcast data, and the battery is mounted on the digital radio receiver body. And, when the power is turned on after the second time and the reception band received when the power was turned on last time is FM broadcasting The DAB is received while displaying on the display means a message indicating that it is preparing to display the time, the time information included in the DAB is extracted, and the extracted time information is displayed on the display means. A time display method including two time display steps .

  Here, from the viewpoint of simplifying the description, only the invention expressed as “device” and “method” of the present invention has been described. However, the present invention is not limited to this, and the gist of the present invention is changed. Needless to say, it may be expressed as an arbitrary category such as “program” and “recording medium” within the range.

  According to the present invention, it is possible to reduce the discomfort given to listeners who mainly listen to FM broadcasts.

  Hereinafter, the best mode of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic diagram showing an example of the overall configuration of a digital radio receiver 1 according to the present invention.

  The digital radio receiver 1 according to the present embodiment includes DAB including time information that has been put into practical use in compliance with European standards, and FM broadcasting other than RDS (Radio Data System) broadcasting that does not include time information. This is a digital radio receiver that can be selectively switched by an operation input by an operator.

  In the digital radio receiver 1 according to the present embodiment, the band changeover switch 1b does not include time information by an operation input in a state where a battery (not shown) is attached to the digital radio receiver main body 1 and the power is turned on. When switching to receive FM broadcast, DAB including time information is received, the time information included in DAB is extracted, and the extracted time information is displayed on the display unit 1o for displaying the time information. This is a digital radio receiver that receives an FM broadcast that does not include time information after being displayed on a display screen (not shown) included in and outputs the received FM broadcast data to the outside.

  The digital radio receiver 1 according to the present embodiment includes a power switch unit 1a, a band switching switch unit 1b, a DAB front end 1c, an A / D conversion unit 1d, a fast Fourier transform unit 1e, and a Viterbi decoding unit. 1f, audio decoder unit 1g, FM front end 1h, FM detection unit 1i, storage unit 1j, control unit 1k, output data switching unit 1l, amplifier unit 1m, speaker unit 1n, display Part 1o.

  The power switch 1a is a switch for turning on the power of the digital radio receiver 1 main body. When the power switch unit 1a is turned on by an operator's operation, a power-on signal indicating that the power of the digital radio receiver 1 body is turned on is output to the control unit 1k.

  The band switching switch unit 1b is a switch that switches which band of DAB and FM is received according to the operation input of the operator. When the band changeover switch unit 1b is switched to a state of receiving DAB, a DAB reception request indicating that there is a request to receive DAB from the operator is output to the control unit 1k. When the band changeover switch unit 1b is switched to a state of receiving FM, an FM reception request indicating that there is a request to receive FM from the operator is output to the control unit 1k.

  The DAB front end 1c performs tuning control with the DAB station, receives a DAB wave transmitted from the DAB station, and outputs an analog signal of the received DAB wave to the A / D converter 1d. To do.

  The A / D conversion unit 1d converts the analog signal output from the DAB front end 1c into a digital signal, and outputs the digital signal obtained as a result of the conversion to the fast Fourier transform unit 1e.

  The fast Fourier transform unit 1e demodulates the OFDM wave included in the digital signal output from the A / D conversion unit 1d, and outputs a signal obtained as a result of the demodulation to the Viterbi decoding unit 1f.

  The Viterbi decoding unit 1f receives the signal output from the fast Fourier transform unit 1e, corrects the error of the received signal, and then obtains FIC (Fast Information Channel) data and MSC (Fast Information Channel) data from the obtained signal. Main Service Channel) data is extracted, and FIC data is output to the control unit 1k, and MSC data is output to the audio decoding unit 1g.

  The audio decoding unit 1g decompresses the MSC data output from the Viterbi decoding unit 1f, restores the original audio data from the decompressed signal, and outputs the resulting audio data as output data Output to the switching unit 1l.

  The FM front end unit 1h performs tuning control to the FM station, receives an FM signal transmitted from the FM station, and outputs the received FM signal to the FM demodulation unit 1i.

  The FM demodulator 1i amplifies the intermediate frequency signal included in the signal output from the FM front end 1h, detects the composite signal from the signal obtained as a result of amplification, and outputs the obtained audio signal as output data Output to the switching unit 1l.

  The storage unit 1j includes information on available services included in DAB broadcasting, information on services, components, links between subchannels, information on FM stations, information indicating whether a specific program is supported, information on specific programs Information for determining the start, information on the band, broadcast station, program, etc. selected by the operator immediately before turning off the power when the power is turned off are stored.

  The control unit 1k includes a DAB front end 1c, an A / D conversion unit 1d, a fast Fourier transform unit 1e, a Viterbi decoding unit 1f, an audio decoder unit 1g, an FM front end 1h, and an FM detection unit 1i. A battery (not shown) is attached to the digital radio receiver main body 1 according to the operation input of the storage unit 1j, output data switching unit 11, amplifier unit 1m, speaker unit 1n, and display unit 1o. When the band changeover switch 1b is switched to receive an FM broadcast that does not include time information by an operation input with the power turned on, the DAB including the time information is received and included in the DAB. Time information is extracted, and the extracted time information is displayed on a display screen (not shown) of the display unit 1o for displaying the time information. The receiving the FM broadcast containing no, has the functions of controlling to output the data of the FM broadcast received externally.

  Among these functions, the functions particularly relevant to the present invention are the following functions.

  The first power on / off determination function switches the power of the digital radio receiver 1 body to the on state when a battery (not shown) is attached to a battery box (not shown) provided in the digital radio receiver 1 body. This is a function to determine whether or not

  When the first power supply control function determines that the power source of the digital radio receiver 1 is turned on by the first power on / off determination function described above, the DAB front end 1c, This function controls a battery (not shown) so as to supply power to the A / D conversion unit 1d, the fast Fourier transform unit 1e, the Viterbi decoding unit 1f, and the audio decoder unit 1g.

  The first DAB reception control function is a DAB radio wave transmitted from a broadcasting station when it is determined by the first power on / off determination function that the power source of the digital radio receiver 1 is switched on. The DAB is received by the DAB front end unit 1c by scanning.

  The first time extraction function receives the error-corrected DAB data received from the Viterbi decoder 1f, and extracts time information included in the received DAB data, thereby acquiring time information from the DAB data. It is a function.

  The first time display control function is a function for displaying time information extracted from DAB data by the time extraction function on a display screen (not shown) of the display unit 1o.

  The first FM broadcast reception determination function is a function for determining whether the reception band selected by the operation input of the band changeover switch unit 1b has been switched to FM broadcast.

  When the first FM broadcast reception control function determines that the reception band selected by the operation input of the band changeover switch unit 1b is switched to the FM broadcast by the first FM broadcast reception determination function described above, the FM front This is a function for causing the end unit 1h to receive FM broadcasts.

  The first power-off process execution function is a function for executing the process of turning off the power of the digital radio receiver 1 as it is when it is determined that the power switch unit 1a is switched to the off state.

  In the second power on / off determination function, is the power of the digital radio receiver 1 main body turned off after the process of turning off the power of the digital radio receiver 1 main body is executed by the power off processing execution function? It is a function to determine.

  The previous reception band determination function determines whether the band received last time is FM broadcasting when it is determined by the second power on / off determination function described above that the power source of the digital radio receiver 1 has been switched on. It is a function.

  When the time display preparation screen display control function determines that the previously received band is an FM broadcast by the previous reception band determination function, the time display preparation screen display control function indicates that preparation for performing time display is being performed ““ Clock setting ”. Is displayed on the display screen of the display unit 1o.

  When the second time extraction function determines that the previously received band is DAB by the previous reception band determination function, the second time extraction function receives DAB and receives the time from the DAB data received from the Viterbi signal decoding unit 1f. This is a function for acquiring time information by extracting information.

  The second time display control function is a function for displaying the time information acquired by the second time extraction function described above on the display screen of the display unit 1o.

  The third time extraction function displays on the display screen of the display unit 1o a display ““ Clock setting ”” indicating that preparation for performing time display is being performed by the time display preparation screen display control function described above. During this time, the DAB front-end unit 1c receives the DAB and extracts the time information from the DAB data received from the Viterbi signal decoding unit 1f, thereby acquiring the time information.

  The third time display control function is a function for displaying the time information acquired by the third time extraction function described above on the display screen of the display unit 1o.

  The FM reception process control function is a function for causing the FM front end unit 1h to execute a reception process for receiving an FM broadcast.

  The second DAB reception control function scans DAB radio waves transmitted from a broadcast station when the DAB front is connected to the DAB front when an external power source such as an AC adapter (not shown) is connected to the digital radio receiver 1 main body. This is a function for the end unit to receive.

  The fourth time extraction function receives DAB data after error correction received from the Viterbi decoding unit 1f, and extracts time information included in the received DAB data, thereby acquiring time information from the DAB data. It is a function.

  The fourth time information display control function is a function for displaying the time information extracted from the DAB data by the fourth time extraction function on the display screen of the display unit 1o.

  In the second power on / off determination function, the digital radio receiver 1 main body is turned on after the time information is displayed on the display screen of the display unit 1o by the above-described fourth time information display control function. This is a function for determining whether switching has been performed.

  The third DAB reception control function scans the DAB radio wave transmitted from the broadcasting station when the power source of the digital radio receiver 1 is switched on by the second power on / off determination function described above. By doing so, the DAB is received by the DAB front end unit 1c.

  The fifth time information display control function receives the DAB data after error correction received from the Viterbi decoding unit 1f, received by the third DAB reception control function, and extracts the time information included in the received DAB data Thus, the time information is acquired from the DAB data, and the time information acquired by extracting from the DAB data is displayed on the display screen of the display unit 1o.

  In the second FM broadcast reception determination function, after the time information is displayed on the display screen of the display unit 1o by the fifth time information display control function, the reception band selected by the operation input of the band changeover switch unit 1b is FM. This is a function for determining whether switching to broadcasting has been performed.

  When the second FM broadcast reception control function determines that the reception band selected by the operation input of the band changeover switch unit 1b is switched to the FM broadcast by the second FM broadcast reception determination function described above, the FM broadcast This is a function for causing the FM front end unit 1h to execute a reception process for receiving.

  The sixth time information display control function is a function for displaying the time information on the display screen of the display unit 1o after receiving the FM broadcast by the above-described second FM broadcast reception control function.

  The power-off determination function is a function that determines whether or not the power switch unit 1a has been switched off after the time information is displayed on the display screen of the display unit 1o by the sixth time information display control function.

  The second power-off process execution function is a function for executing the process of turning off the power of the digital radio receiver 1 as it is when it is determined that the power switch unit 1a is switched to the off state.

  The output data switching unit 1l selects DAB broadcast data or FM broadcast data and audio data read from other externally connected media such as a CD or a cassette tape in accordance with a predetermined priority order. To selectively switch and output.

  The amplifier 1m amplifies the audio data output from the output data switching unit 11 and outputs it to the speaker 1n.

  The speaker 1n outputs the audio data output from the amplifier 1m as sound to the outside.

  The display unit 1o includes a display screen that displays time information.

  Next, execution processing executed by the digital radio receiver configured as described above will be described with reference to the drawings.

  2 and 3 are flowcharts for explaining execution processing executed by the digital radio receiver 1 when the digital radio receiver according to the present embodiment is powered by a battery.

  First, execution processing executed by the digital radio receiver 1 when the digital radio receiver 1 according to the present embodiment is powered by a battery will be described.

  When a battery (not shown) is attached to a battery box (not shown) provided in the digital radio receiver 1 main body according to the present embodiment (A1), the control unit 1k is in a state where the power of the digital radio receiver 1 main body is on. (A2).

  If it is determined in step A2 that the power source of the digital radio receiver 1 is switched on (A2: Yes), the control unit 1k determines the DAB front end 1c and the A / D conversion unit 1d. Then, power is supplied to the fast Fourier transform unit 1e, the Viterbi decoding unit 1f, and the audio decoder unit 1g (A3).

  On the other hand, when it is determined that the power source of the radio receiver 1 main body has not been switched on in step A2 (A2: No), the control unit 1k turns on the power source of the digital radio receiver 1 main body. The determination process regarding whether or not the switch has been turned on is repeated.

  In step A4, the control unit 1k causes the DAB front end unit 1c to receive DAB by scanning the DAB radio wave transmitted from the broadcasting station.

  In step A5, the control unit 1k receives the DAB data after error correction received from the Viterbi decoding unit 1f, and extracts time information included in the received DAB data, thereby obtaining time information from the DAB data. To do.

  In step A6, the control unit 1k displays the time information extracted from the DAB data on the display screen of the display unit 1o.

  In step A7, the control unit 1k determines whether the reception band selected by the operation input of the band changeover switch unit 1b has been switched to FM broadcasting.

  If the control unit 1k determines that the reception band selected by the operation input of the band changeover switch unit 1b in step A7 has been switched to FM broadcast (A7: Yes), the FM broadcast to the FM front end unit 1h. Is received (A8).

  On the other hand, when the control unit 1k determines that the reception band selected by the operation input of the band switching switch unit 1b in step A7 is not switched to FM broadcasting (A7: No), the power switch unit 1a Is switched to the off state (A9).

  In step A10, the control unit 1k displays the time information acquired from the DAB data on the display screen of the display unit 1o.

  If it is determined in step A9 that the power switch unit 1a is switched to the off state (A9: Yes), the control unit 1k executes a process of turning off the power of the digital radio receiver 1 itself.

  On the other hand, when the control unit 1k determines that the power switch is not switched to the OFF state in the above-described step A9 (A9: No), the reception selected by the operation input of the band switching switch unit 1b described above. A determination process regarding whether the band has been switched to FM broadcasting is executed.

  In step A11, the control unit 1k determines whether the power switch unit 1a has been switched to an off state.

  When it is determined that the power switch unit 1a is switched to the off state in the above-described step A11 (A11: Yes), the control unit 1k executes a process of turning off the power source of the digital radio receiver 1 as it is. .

  On the other hand, if it is determined in step A11 that the power switch unit 1a has not been switched off (A11: No), the control unit 1k has switched the power switch unit 1a to the off state. The determination process related to is repeated.

  In step A12, the control unit 1k determines whether or not the power source of the main body of the digital radio receiver 1 has been switched on.

  When determining that the power source of the digital radio receiver 1 is switched to the on state in the above-described step A12 (A12: Yes), the control unit 1k determines whether the previously received band is FM broadcast ( A13).

  On the other hand, if the control unit 1k determines that the power source of the digital radio receiver 1 main body has not been switched on in step A12 (A12: No), the power source of the digital radio receiver 1 main body is turned on. The determination process regarding whether or not the switch has been turned on is repeated.

  When the control unit 1k determines that the previously received band is FM broadcast in the above-described step A13 (A13: Yes), it is referred to as ““ Clock setting ”” indicating that it is preparing to display the time. The display is displayed on the display screen of the display unit 1o (A14).

  On the other hand, if the control unit 1k determines that the previously received band is DAB in the above-described step A13 (A13: No), the control unit 1k receives the DAB and uses the DAB data received from the Viterbi signal decoding unit 1f. The time information is obtained by extracting the time information (A15).

  In step A16, the control unit 1k causes the DAB front end unit 1c to receive DAB.

  In step A17, the control unit 1k displays the time information acquired in step A15 described above on the display screen of the display unit 1o.

  In step A18, the control unit 1k acquires time information by extracting time information from DAB data received from the Viterbi signal decoding unit 1f.

  In step A19, the control unit 1k determines whether the power switch unit 1a has been switched to an off state.

  When it is determined that the power switch unit 1a is switched to the off state in the above-described step A19 (A19: Yes), the control unit 1k executes the process of turning off the power of the digital radio receiver 1 as it is. The execution process ends.

  If it is determined in step A19 that the power switch 1a has not been switched off (A19: No), the controller 1k causes the DAB front end 1c to receive the DAB as it is. Continue.

  In step A20, the control unit 1k displays the time information acquired in step A18 described above on the display screen of the display unit 1o.

  In step A21, the control unit 1k causes the FM front end unit 1h to execute reception processing for receiving FM broadcasts.

  In step A22, the control unit 1k determines whether the power switch unit 1a has been switched to an off state.

  If it is determined in step A22 that the power switch 1a has been switched to the off state (A22: Yes), the controller 1k executes the process of turning off the power of the digital radio receiver 1 itself. .

  On the other hand, if it is determined in step A22 that the power switch unit 1a has not been switched off (A22: No), the control unit 1k receives the above-described DAB as it is in the DAB front end unit 1c. Continue processing.

  Through the series of processes described above, the digital radio receiver 1 according to the present embodiment ends the execution process that is executed when the digital radio receiver 1 is powered by a battery.

  Next, execution processing executed by the digital radio receiver 1 when the digital radio receiver 1 according to the present embodiment is powered by an external power source such as an AC adapter (not shown) will be described.

  FIG. 4 is a flowchart for explaining execution processing executed by the digital radio receiver 1 when the digital radio receiver 1 according to the present embodiment is powered by an external power source such as an AC adapter.

  First, when an external power source such as an AC adapter (not shown) is connected to the digital radio receiver 1 body according to the present embodiment (B1), the control unit 1k scans the DAB radio waves transmitted from the broadcasting station. Thus, DAB is received by the DAB front end unit 1c (B2).

  In step B3, the control unit 1k receives the error-corrected DAB data received from the Viterbi decoding unit 1f, and obtains time information from the DAB data by extracting the time information included in the received DAB data. To do.

  In step B4, the control unit 1k displays the time information extracted from the DAB data on the display screen of the display unit 1o.

  In step B5, the control unit 1k determines whether or not the power source of the main body of the digital radio receiver 1 has been switched on.

  When the power source of the digital radio receiver 1 is switched on in step B5 described above (B5: Yes), the control unit 1k scans the DAB radio wave transmitted from the broadcasting station, DAB is received by the DAB front end unit 1c (B6).

  On the other hand, if it is determined in step B5 that the power source of the radio receiver 1 main body has not been switched on (B5: No), the control unit 1k turns on the power source of the digital radio receiver 1 main body. The determination process regarding whether or not the switch has been turned on is repeated.

  In step B7, the control unit 1k receives the error-corrected DAB data received from the Viterbi decoding unit 1f, and obtains time information from the DAB data by extracting the time information included in the received DAB data. The time information acquired by extracting from the DAB data is displayed on the display screen of the display unit 1o.

  In step B8, the control unit 1k determines whether the reception band selected by the operation input of the band changeover switch unit 1b has been switched to FM broadcasting.

  When the control unit 1k determines that the reception band selected by the operation input of the band changeover switch unit 1b in Step B8 is switched to FM broadcasting (B8: Yes), the control unit 1k performs processing for receiving FM broadcasting. The front end unit 1h is executed (B9).

  On the other hand, if the control unit 1k determines that the reception band selected by the operation input of the band switching switch unit 1b in step B8 is not switched to FM broadcasting (B8: No), the power switch unit 1a Is switched to the off state (B10).

  If it is determined in step B10 that the power switch unit 1a has been switched to the off state (B10: Yes), the control unit 1k executes the process of turning off the power of the digital radio receiver 1 itself.

  On the other hand, when it is determined in step B10 that the power switch unit 1a has not been switched to the off state (B10: No), the control unit 1k selects according to the operation input of the band switching switch unit 1b. A determination process regarding whether the received band is switched to FM broadcasting is executed.

  In step B11, the control unit 1k displays time information on the display screen of the display unit 1o.

  In step B12, the control unit 1k determines whether the power switch unit 1a has been switched to the off state.

  If it is determined in step B12 that the power switch unit 1a has been switched to the off state (B12: Yes), the control unit 1k performs the process of turning off the power of the digital radio receiver 1 itself.

  On the other hand, if the control unit 1k determines that the power switch unit 1a has not been switched to the off state in step B12 described above (B12: No), the control unit 1k relates to whether the power switch unit 1a has been switched to the off state. Repeat the determination process.

  In step B13, the control unit 1k determines whether or not the power source of the main body of the digital radio receiver 1 has been switched on.

  When the control unit 1k determines that the power source of the digital radio receiver 1 is switched on in the above-described step B13 (B13: Yes), the control unit 1k is transmitted from the broadcasting station as in the above-described step B2. The DAB front end unit 1c is caused to perform processing for receiving DAB by scanning the DAB radio wave.

  On the other hand, if the control unit 1k determines in step B13 described above that the power source of the digital radio receiver 1 main body has not been switched on (B13: No), the process ends.

  Through the series of processes as described above, the digital radio receiver 1 according to the present embodiment ends the execution process that is executed when the digital radio receiver 1 is powered by an external power source such as an AC adapter.

  As described above, according to the digital radio receiver 1 according to the present embodiment, the FM broadcast is received by the operation input in a state where the battery is attached to the digital radio receiver main body and the power is turned on. When the reception band is switched, the DAB is received, the time information included in the DAB is extracted, and the extracted time information is displayed on the display screen of the display unit 1o for displaying the time information. Therefore, the listener does not have to bother to operate the switch and receive DAB when listening to the FM broadcast.

  As a result, it is possible to reduce the discomfort given to listeners who mainly listen to FM broadcasts.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention in the implementation stage. Further, the above embodiment includes inventions at various stages, and various inventions can be generated by appropriately combining a plurality of disclosed constituent elements. For example, when an invention is generated by omitting some requirements from all the constituent requirements shown in the embodiment, the omitted portion is supplemented by a well-known common technique at the stage of implementing the generated invention. It is.

  In addition, the present invention can be implemented with various modifications without departing from the scope of the invention.

It is a schematic diagram which shows an example of the whole structure of the digital radio receiver 1 which concerns on this invention. It is a flowchart for demonstrating the execution process which the said digital radio receiver 1 performs, when it supplies with electric power with respect to the digital radio receiver 1 which concerns on this Embodiment with a battery. It is a flowchart for demonstrating the execution process which the said digital radio receiver 1 performs, when it supplies with electric power with respect to the digital radio receiver 1 which concerns on this Embodiment with a battery. 6 is a flowchart for explaining execution processing executed by the digital radio receiver 1 when the digital radio receiver 1 according to the present embodiment is powered by an external power source such as an AC adapter.

Explanation of symbols

1 digital radio receiver, 1a power switch, 1b band changeover switch, 1c DAB front end, 1d A / D converter, 1e fast Fourier transform, 1f Viterbi decoder, 1g audio decoder, 1h FM front end 1i FM detection unit, 1j storage unit, 1k control unit, 1l output data switching unit, 1m amplifier unit, 1n speaker unit, 1o display unit

Claims (2)

A power switch to turn on the digital radio receiver body,
First receiving means for receiving FM (Frequency Modulation) broadcasting;
Second receiving means for receiving DAB (Digital Audio Broadcast);
Band switching means for switching between an FM broadcast reception band received by the first reception means and a DAB reception band received by the second reception means in response to an operation input;
A battery that is detachable from the digital radio receiver body, and that supplies power to the first receiving means and the second receiving means in a state of being attached to the digital radio receiver body;
When the battery is mounted on the digital radio receiver main body and the power is turned on for the first time , and the band switching means is switched to receive the FM broadcast by the operation input, the first Receiving the DAB by the receiving means 2, extracting the time information included in the DAB, displaying the extracted time information on a display means for displaying the time information, and receiving the digital radio from the battery Time display is performed when the reception band received when the power was turned on last time was FM broadcasting with the power supply turned on for the second time or later. While the DAB is received by the second receiving means while displaying a message indicating that it is preparing, the time included in the DAB Display control means for extracting the broadcast, the extracted time information to perform a process of displaying on the display means,
A digital radio receiver comprising: an output means for receiving the FM broadcast received by the first receiving means and outputting data of the received FM broadcast. DAB is received when the battery is attached to the digital radio receiver body and the reception band is switched to receive FM broadcast by operation input with the digital radio receiver body turned on for the first time. DAB receiving process to
A time extracting step of extracting time information included in the DAB received in the DAB receiving step;
A first time information display step of displaying the time information extracted in the time extraction step on a display means for displaying the time information;
FM broadcast receiving process for receiving FM broadcast and outputting the received FM broadcast data ;
When the battery is mounted on the digital radio receiver body and the power is turned on after the second time, the reception band received when the power was turned on last time was FM broadcasting. In this case, while displaying on the display means a message indicating that it is preparing to display the time, the DAB is received, the time information included in the DAB is extracted, and the extracted time information is displayed on the display means. A time display method including a second time display step of displaying.

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