JP6044984B2 - Radio receiver - Google Patents

Description

  The present invention relates to a radio receiving apparatus that can receive both digital broadcasts and analog broadcasts in a predetermined frequency band and performs a seek operation to search for broadcast programs that are received by sequentially changing tuning frequencies.

  2. Description of the Related Art Conventionally, there is a radio receiving apparatus that can perform a seek operation to search for a broadcast program that is received by sequentially changing the tuning frequency (see, for example, Patent Document 1). In such a radio receiver, the user can output the sound of the broadcast program that is received by changing the tuning frequency in sequence without performing the tuning operation (tuning operation). Find programs faster.

JP-A-5-275980

  Incidentally, in recent years, digital broadcasting services using DRM (Digital Radio Mondiale) have been started in some countries. In this DRM, digital broadcasting by AM modulation is performed using a short wave band and a medium wave band. Thus, since digital broadcasting by DRM is broadcasting by AM modulation using the short wave band and medium wave band, the equipment of conventional analog broadcasting by AM modulation using the short wave band and medium wave band is similarly used as it is. Can be diverted. For this reason, it is conceivable that the same program from the same broadcasting station will be broadcast in the future by conventional analog broadcasting and DRM digital broadcasting using different frequencies. The actual DRM also defines MCS (Multi-Channel Simulcast) that distributes the digital broadcast frequency of the same program (content) adjacent to the existing analog broadcast frequency.

  In a radio receiver capable of receiving both analog broadcasts and digital broadcasts that are AM-modulated using the short wave band and the medium wave band, analog broadcasts and digital broadcasts of the same program from the same broadcast station are received at different frequencies. Therefore, a seek operation that is more favorable for the user is desired.

  The present invention has been made in view of the above circumstances, and enables a more preferable seek operation for a user in a radio receiver capable of receiving both digital broadcasts and analog broadcasts.

The radio receiver of the present invention is capable of receiving digital broadcasts and analog broadcasts in a predetermined frequency band, performs a seek operation to search for a broadcast program received by sequentially changing the tuning frequency according to a predetermined rule, A radio receiver for outputting sound of a broadcast program received by a seek operation, a storage means for storing a correspondence relationship between analog broadcast and digital broadcast of the same program from the same broadcast station, and Determination means for determining whether there is a digital broadcast of the same program from the same broadcast station as the analog broadcast in a state where the audio output of the program is made, based on the correspondence stored in the storage means; When the determination means determines that there is a digital broadcast of the same program from the same broadcast station as the analog broadcast, the tuning frequency of the analog broadcast program A seek operation control means for the changing the tuning frequency of the digital broadcast program regardless of the tuning frequency in the seek operation to the predetermined rule starting from the audio output of the digital broadcast program received by the seek operation In the seek operation that is started in a state in which the tuning operation is performed, a return seek operation control unit that changes a tuning frequency to a frequency after the tuning frequency of the analog broadcast according to the predetermined rule is provided.

With such a configuration, whether or not there is a digital broadcast of the same program from the same broadcast station as the analog broadcast while the audio output of the received analog broadcast program is being output is stored in the storage means Analog broadcast program when it is determined based on the correspondence between analog broadcast and digital broadcast of the same program from the same broadcast station, and it is determined that there is a digital broadcast of the same program from the same broadcast station as the analog broadcast Since the tuning frequency can be changed to the tuning frequency of a digital broadcast program regardless of a predetermined rule in the seek operation starting from the tuning frequency of the digital broadcast, the same program as the received analog broadcast program can be digitalized more quickly. It can be received by broadcasting. Further, in the seek operation started in a state where the audio output of the digital broadcast program received by the seek operation is being performed, the tuning frequency is changed to a tuning frequency after the analog broadcast tuning frequency. Even if a seek operation is performed after changing to the tuning frequency of digital broadcasting, the broadcasting stations are sequentially sought according to a predetermined rule starting from the frequency after the tuning frequency of analog broadcasting before changing the tuning frequency. It becomes possible to do.

  In the radio receiving apparatus of the present invention, the storage means can be configured to store both analog broadcast and digital broadcast tuning frequencies of the same program from the same broadcast station in association with each other.

  According to such a configuration, since the storage means stores both the analog broadcast and digital broadcast tuning frequencies of the same program from the same broadcast station in association with each other, the analog broadcast program and the digital of the same program from the same broadcast station are stored. It becomes possible to determine more quickly whether there is a broadcast program.

  The radio receiver according to the present invention includes jump seek storage means for storing jump seek information indicating that a seek operation has been performed from the analog broadcast program to the same digital broadcast program from the same broadcast station as the analog broadcast. The return seek operation control means includes a seek operation that is started in a state in which the received digital broadcast audio is being output when the jump seek information is stored in the jump seek storage means. The tuning frequency can be changed to a frequency after the tuning frequency of the analog broadcast according to the predetermined rule.

  According to such a configuration, reception is performed when jump seek information indicating that there has been a seek operation from an analog broadcast program to the same digital broadcast program from the same broadcast station as the analog broadcast is stored. In the seek operation that starts when the audio output of the digital broadcast is made, the tuning frequency is changed to a frequency after the tuning frequency of the analog broadcast according to a predetermined rule. Even if the seek operation is performed after changing to the frequency, only when the jump seek information is stored, the frequency after the tuning frequency of the analog broadcast before changing the tuning frequency is used as a starting point. It is possible to seek broadcast stations sequentially according to the rules.

  The radio receiver according to the present invention provides an analog broadcast and a digital broadcast of the same program from the same broadcast station based on the information of the receivable broadcast program obtained by sequentially changing the tuning frequency without outputting the sound of the broadcast program. It is possible to adopt a configuration having means for storing the correspondence relationship with the storage means in the storage means.

  According to such a configuration, analog broadcast and digital broadcast of the same program from the same broadcast station based on the information of receivable broadcast programs obtained by sequentially changing the tuning frequency without outputting the audio of the broadcast program Therefore, it is possible to receive more analog broadcast programs and the same programs as digital broadcasts while the audio output of the received analog broadcast programs is being performed.

  According to the radio receiver of the present invention, in a state where the audio of the received analog broadcast program is being output, whether or not there is a digital broadcast of the same program from the same broadcast station as the analog broadcast is stored Is determined based on the correspondence between the analog broadcast and the digital broadcast of the same program from the same broadcast station stored in the, and when it is determined that there is a digital broadcast of the same program from the same broadcast station as the analog broadcast, In the seek operation starting from the tuning frequency of the analog broadcast program, the tuning frequency is changed to the tuning frequency of the digital broadcasting program regardless of a predetermined rule, so that the same program as the received analog broadcasting program can be made more quickly. Because it can be received by digital broadcasting, a radio receiving apparatus capable of receiving both digital broadcasting and analog broadcasting is recommended for users. More preferably the seek operation becomes possible.

It is a block diagram which shows the structure of the radio receiver which concerns on embodiment of this invention. It is a figure which shows an example of the broadcast frequency of analog broadcasting and digital broadcasting. It is a flowchart which shows the process which acquires the information of the broadcast program of the broadcast station in the background of the control unit shown in FIG. The figure which shows the table which matched the frequency of the analog broadcast of the same broadcast program from the same broadcast station, and the frequency of digital broadcast which were acquired by the process which acquires the broadcast program of the broadcast station in the background shown in FIG. It is. It is a flowchart which shows the seek operation control process of the broadcasting station of the control unit shown in FIG.

  Embodiments of the present invention will be described with reference to the drawings.

  A radio receiver according to an embodiment of the present invention is configured as shown in FIG. The radio receiving apparatus 100 is capable of receiving an AM-modulated analog broadcast in the medium wave band and receiving an AM-modulated digital broadcast in the same medium wave band by DRM. It is assumed that the analog broadcast and the digital broadcast by DRM are performed at the frequency shown in FIG. 2, for example.

  In FIG. 2, an analog broadcast A1 is performed at a frequency f1 from an ABC station. A digital broadcast D2 is made from the DEF station at a frequency f2 higher than the frequency f1. The digital broadcast D3 is made from the UVW station at a frequency f3 higher than the frequency f2. Further, an analog broadcast A2 is performed from the DEF station at a frequency f4 higher than the frequency f3. An analog broadcast A3 is made from the XYZ station at a frequency f5 higher than the frequency f4. Then, the digital broadcast D1 is made from the ABC station at a frequency f6 higher than the frequency f5. A digital broadcast D4 is made from the GHI station at a frequency f7 higher than the frequency f6. As described above, the ABC station broadcasts the analog broadcast A1 and the digital broadcast D1, and the broadcast programs are the same, although the broadcast formats are different. Similarly, in the DEF station, the same program is broadcast by both the analog broadcast A2 and the digital broadcast D2.

  Among these frequencies, the frequency f1 is the lowest frequency, the frequency is higher in the order of the frequency f2, the frequency f3, the frequency f4, the frequency f5, and the frequency f6, and the frequency f7 is the highest frequency. . For example, a frequency that is higher than the frequency (f = f1) of the analog broadcast A1 by a predetermined frequency interval Δf (for example, 9 kHz) is represented by a frequency (f = f1 + Δf). The predetermined frequency interval Δf is always constant. For example, the frequency f2 at which the digital broadcast D2 is performed can be expressed as f1 + 20Δf. That is, the frequency at which these analog broadcasts and digital broadcasts are performed is a frequency obtained by adding a basic frequency f1 multiplied by a plurality of predetermined frequency intervals Δf.

  Returning to FIG. 1, the radio receiving apparatus 100 includes an AM tuner 11, a demodulation circuit 12, a digital broadcast processing unit 13, an analog broadcast processing unit 14, an output circuit 15, and a speaker 16. The radio receiving apparatus 100 further includes a processing unit 20, an operation unit 21, a display unit 22, a broadcast information extraction unit 23, and a storage unit 24.

  The AM tuner 11 receives a broadcast signal having a tuning frequency that is AM-modulated in the medium wave band, and the broadcast signal is demodulated by the demodulation circuit 12 to generate a reception signal that represents the actual broadcast content. The digital broadcast processing unit 13 processes the reception signal for the digital broadcast output from the demodulation circuit 12 to generate and output an audio signal. The analog broadcast processing unit 14 processes the reception signal for the analog broadcast output from the demodulation circuit 12 to generate and output an audio signal. The output circuit 15 performs processing such as amplification on the audio signal from the digital broadcast processing unit 13 or the analog broadcast unit 14, and drives the speaker 16 in accordance with the processed audio signal. Thereby, a sound based on the audio signal is emitted from the speaker 16.

  An operation unit 21, a display unit 22, a broadcast information extraction unit 23, and a storage unit 24 are connected to the control unit 20. The control unit 20 executes various control processes in accordance with operations on the operation unit 21. Under the control of the control unit 20 for the AM tuner 11, the digital broadcast processing unit 13, and the analog broadcast processing unit 14, reception and audio output of analog broadcast and digital broadcast and a seek operation as described later are performed. Under the control of the control unit 20, the broadcast information extraction unit 23 extracts broadcast information representing predetermined items about the broadcast program including the broadcast station name and the program name from the received signal output from the demodulation circuit 12, and the control unit 20 20 to provide. The broadcast station name extracted from the broadcast information provided to these control units 20, the frequency at which the broadcast is performed, the broadcast system (information indicating either digital broadcast or analog broadcast), and the like are stored in the storage unit 24. The In addition, the control unit 20 causes the display unit 22 to display the broadcast station name and broadcast information stored in the storage unit 24.

  Under the control of the control unit 20, the same broadcast station information from the same broadcast station is obtained on the basis of information on receivable broadcast programs obtained by sequentially changing the tuning frequency without outputting the broadcast program audio according to the procedure shown in FIG. Processing for storing the correspondence between analog broadcasting and digital broadcasting of the program (both tuning frequencies of analog broadcasting and digital broadcasting) in the storage unit 24 is performed. This process is performed as a background process of the radio receiving apparatus 100. When this process is being performed, the received broadcast program is not output as audio.

  In FIG. 3, under the control of the control unit 20, the AM tuner 11 searches for a broadcast station having a frequency f = f + Δf, for example (S11), and confirms reception of a broadcast program at the tuning frequency (S12). . For example, when an analog broadcast A1 (see FIG. 2) is received by this search, the control unit 20 transmits broadcast information that is information including a broadcast station name and a program name, a tuning frequency at which the broadcast is performed, and the broadcast program. Information indicating whether the broadcast type is analog broadcast or digital broadcast is stored in the storage unit 24 (S13). Then, after the processing of step S13 is performed, or when it is determined in step S12 that the broadcast program having the tuning frequency of step S11 cannot be received (NO in S12), the control unit 20 broadcasts all the tuning frequencies. It is determined whether or not the program search and reception process has been completed (S14).

  Accordingly, if it is determined that the search / reception process of the broadcast program with all the tuning frequencies is not completed (NO in S14), the control unit 20 returns to the process of step S11. At this time, for example, if the tuning frequency searched in step S11 described above is f1, the frequency to be searched next is f = f1 + Δf. In this way, the seek operation is performed based on a predetermined rule of searching stepwise for each frequency obtained by adding the predetermined frequency Δf to the tuning frequency (f). Based on such a predetermined rule, the control unit 20 repeats the processes from steps S11 to S14 described above for all tuning frequencies. When the search processing for all the tuning frequencies by the control unit 20 is completed (YES in S14), the control unit 20 creates an analog / digital correspondence table (S15) and ends the background processing.

  At this time, when analog broadcasting and digital broadcasting are performed at the frequency shown in FIG. 2, the analog / digital correspondence table stored in the storage unit 24 is as shown in FIG.

  In FIG. 4, the storage unit 24 stores the tuning frequency (fa) of analog broadcasting that broadcasts the same program from the same broadcasting station and the tuning frequency (fd) of digital broadcasting in a table format in association with each other. Yes. For example, in the ABC broadcasting station, the tuning frequency f1 of the analog broadcast A1 and the tuning frequency f6 of the digital broadcast D1 are stored in association with each other. In the DFE station, the tuning frequency f4 of the analog broadcast A2 and the tuning frequency f2 of the digital broadcast D2 are stored in association with each other. In this way, the analog / digital correspondence table stored in the storage unit 24 stores only the tuning frequencies of analog broadcasting and digital broadcasting that broadcast the same program by the same broadcasting station in association with each other. Yes. Note that all the broadcast information / analog broadcast / digital broadcast acquired in step S13 is stored, but after the analog / digital correspondence table is created, all of these stores may be deleted.

  Through the background processing as described above, both tuning frequencies of analog broadcasting and digital broadcasting are associated with each other and stored in the storage unit 24. In such a case, the radio reception of the radio receiver 100 itself and the seek operation during radio reception are performed as shown in FIG. This will be described in detail below.

  5, initially, under the control of the control unit 20 (S20), the AM tuner 11 receives, for example, an analog broadcast A1 (see FIG. 2) having a tuning frequency (f = f1), the demodulation circuit 12 and According to the processing in the analog broadcast processing unit 14, the audio of the program of the analog broadcast A 1 is output from the speaker 16, and the broadcast information about the analog broadcast A 1 extracted by the broadcast information extraction unit 23 is sent to the display unit 22. Is displayed. Then, the control unit 20 confirms whether or not the received broadcast program is an analog broadcast (S21). For example, if the tuning frequency (f = f1), the control unit 20 determines that the received broadcast program is the analog broadcast A1 (YES in S21), and the tuning frequency of the digital broadcast corresponding to the analog broadcast A1 is It is determined whether or not it is stored in the storage unit 24 (S22: determination means). Specifically, the control unit 20 outputs a digital broadcast of the same program from an ABC broadcast station, which is the same broadcast station as the analog broadcast A1 program, while the audio of the received analog broadcast A1 program is being output. Whether or not there is is determined by searching from an analog / digital correspondence table stored in association with the storage unit 24.

  As a result, the storage unit 24 stores the tuning frequency (f = f6) of the digital broadcast D1 that broadcasts the same program associated with the tuning frequency (f = 1) of the analog broadcast A1 by the ABC broadcast station. When the determination is made (YES in S22), the control unit 20 sets the jumping / seek flag to the ON state (S23: jump seek storage means), and the seek operation is stored in the storage unit 24. f = f6) (S24: seek operation control means). That is, the control unit 20 turns on the jumping / seek flag (jump seek information) indicating that the seek operation from the analog broadcast A1 program to the same program of the digital broadcast A1 from the same broadcast station ABC is performed. Regardless of the predetermined rule described above, the tuning frequency (f = f6) of the digital broadcast D1 program is set in the state (memory) and the seek operation is started from the tuning frequency (f = f1) of the analog broadcast A1 program. ). Then, the control unit 20 confirms reception of the broadcast program by a seek operation performed from the tuning frequency (f = f6) of the digital broadcast D1 (S25). Then, for example, when the reception of the broadcast program by the digital broadcast D1 is confirmed from the AM tuner 11 (YES in S25), the received broadcast program of the digital broadcast D1 is output as sound (S31).

  As a result, the user (user) digitally outputs the same program from the ABC broadcast station, which is the same broadcast station as the broadcast station that broadcasts the analog broadcast A1 program, while the audio of the analog broadcast A1 program is being output. A storage unit 24 that stores whether or not there is a broadcast D1 in association with a tuning frequency (f = f1) of an analog broadcast of the same program from an ABC broadcast station and a tuning frequency (f = f6) of a digital broadcast. Is determined based on the analog / digital correspondence table (see FIG. 4), and it is determined that there is a digital broadcast D1 of the same program from the ABC broadcast station that is the same broadcast station as the broadcast station that broadcasts the analog broadcast A1 program. Sometimes, in a seek operation started from the tuning frequency (f = f1) of the analog broadcast A1 program, the tuning frequency (f = f1) of the digital broadcast D1 is set regardless of a predetermined rule. Since changing the set of tuning frequency (f = f6), it is possible to receive a program of the same program analog broadcasting A1 being received at faster digital broadcasting D1.

  When the user further instructs a seek operation in a state where the broadcast program is broadcast by the digital broadcast D1 (S20), the control unit 20 confirms whether or not the received broadcast program is an analog broadcast. (S21). In this case, since it is determined that the received broadcast program is broadcast by the digital broadcast D1 (NO in S21), the control unit 20 determines whether or not the jumping / seek flag is in the ON state (S26). : Return seek operation control means). That is, it is determined whether or not there has been a seek operation from the analog broadcast A1 program to the same program of the digital broadcast D1 from the ABC station that is the same broadcast station as the analog broadcast A1. In this case, the control unit 20 determines that the jumping / seek flag is ON because the jumping / seek flag is ON in step S23 described above (YES in S26), and turns off the jumping / seek flag. The state is set (S27).

  The tuning frequency for performing the seek operation is changed from the current tuning frequency (f = f6) to the tuning frequency of the analog broadcast A1 stored in the storage unit 24 in association with the tuning frequency (f = f6) of the digital broadcast. The frequency is changed to (f = f1 + Δf) obtained by adding a predetermined frequency interval Δf to (f = f1) (S28: return seek operation control means). In other words, the seek operation is originally performed by searching from the frequency (f = f6 + Δf) obtained by adding the predetermined frequency interval Δf to the current tuning frequency (f = f6). In step S24 described above, the tuning frequency of the analog broadcast A1 is obtained. Since (f = f1) is changed to the tuning frequency (f = f6) of the digital broadcast D1, the broadcast is performed at any one of the tuning frequencies between the tuning frequency of the analog broadcast A1 and the tuning frequency of the digital broadcast D1. Since it becomes impossible to seek a broadcast program and a broadcast station that broadcasts the program, the frequency is changed to a frequency (f = f1 + Δf) after the tuning frequency (f = f1) of the analog broadcast A1.

  As a result, the user can change the tuning frequency (f = f6) to the tuning frequency (f = f6) of the analog broadcast A1 in the seek operation started in a state where the audio of the digital broadcast D1 program received by the seek operation is being output. f1) Since the frequency is changed to the subsequent frequency (f = f1 + Δf), the seek operation is performed after the tuning frequency (f = f1) of the analog broadcast A1 is changed to the tuning frequency (f = f6) of the digital broadcast D1. Even so, since the broadcasting station is sequentially sought according to a predetermined rule starting from the frequency (f = f1 + Δf) after the tuning frequency (f = f1) of the analog broadcast A1 before changing the tuning frequency, the analog broadcast A1 A broadcast program broadcast at any of the tuning frequencies between the tuning frequency (f = f1) and the tuning frequency (f = f6) of the digital broadcast D1; It is possible to prevent the broadcast station that broadcasts the program from being unable to seek.

  Then, the control unit 20 determines whether or not a broadcast program is received at the frequency (f = f1 + Δf) changed in step S28 (S30). In this case, referring to FIG. 2, since neither digital broadcasting nor analog broadcasting is performed (NO in S30), the control unit 20 further increases the searched frequency (f = f1 + Δf) according to a predetermined rule. The predetermined frequency interval Δf is added (S29), and it is determined whether or not the broadcast program is received again. The control unit 20 repeats such a seek operation (S29, S30). Upon confirming reception of a broadcast program by the digital broadcast D2 from the AM tuner 11 (YES in S30), for example, the received digital broadcast D2 (tuning frequency f) = B2) is broadcasted (S31).

  When the user further instructs a seek operation in a state where the broadcast program is being broadcast by the digital broadcast D2 (S20), the control unit 20 confirms whether or not the received broadcast program is an analog broadcast. (S21). In this case, since the received broadcast program is broadcast by the digital broadcast D2 (NO in S21), the control unit 20 determines whether or not the jumping / seek flag is in the ON state (S26). In this case, since the jumping / seek flag is in the OFF state, it is determined that the jumping / seek flag is in the OFF state (NO in S26), and the control unit 20 performs the digital broadcast D2 currently received according to a predetermined rule. The predetermined frequency interval Δf is further added to the tuning frequency (f = f2) (S29), and it is determined whether or not the broadcast program has been received again. The control unit 20 repeats such a seek operation (S29, S30). When the reception of a broadcast program by the digital broadcast D3, for example, is confirmed from the AM tuner 11 (YES in S30), the received digital broadcast D3 (tuning frequency f) = F3) is broadcasted (S31).

  When the user further instructs a seek operation in a state where the broadcast program is being broadcast by the digital broadcast D3 (S20), the control unit 20 confirms whether or not the received broadcast program is an analog broadcast. (S21). In this case, since the received broadcast program is broadcast by the digital broadcast D3 (NO in S21), the control unit 20 determines whether or not the jumping / seek flag is in the ON state (S26). In this case, since the jumping / seek flag is in the OFF state, it is determined that the jumping / seek flag is in the OFF state (NO in S26), and the control unit 20 performs the digital broadcast D3 currently received according to a predetermined rule. The predetermined frequency interval Δf is further added to the tuning frequency (f = f3) (S29), and it is determined whether or not the broadcast program has been received again. The control unit 20 repeats such a seek operation (S29, S30). When the reception of a broadcast program by the analog broadcast A2 is confirmed from the AM tuner 11 (YES in S30), the received analog broadcast A2 (tuning frequency f) = F4) is broadcasted (S31).

  When the user further instructs a seek operation in a state where the broadcast program is being broadcast by the analog broadcast A2 (S20), the control unit 20 confirms whether or not the received broadcast program is an analog broadcast. (S21). In this case, since the received broadcast program is broadcast by the analog broadcast A2 (YES in S21), it is determined whether or not the tuning frequency of the digital broadcast corresponding to the analog broadcast A2 is stored in the storage unit 24 ( S22). As a result, the storage unit 24 stores the tuning frequency (f = f2) of the digital broadcast D2 that broadcasts the same program associated with the tuning frequency (f = f4) of the analog broadcast A2 by the DEF broadcast station. When the determination is made (YES in S22), the control unit 20 turns on the jumping / seek flag (S23), and the seek operation is performed from the tuning frequency (f = f2) of the digital broadcast D2 stored in the storage unit 24. It changes so that it may perform (S24). Then, the control unit 20 confirms reception of the broadcast program by a seek operation performed from the tuning frequency (f = f2) of the digital broadcast D2 (S25). Then, for example, when the reception of the broadcast program by the digital broadcast D2 is confirmed from the AM tuner 11 (YES in S25), the received broadcast program of the digital broadcast D2 is output as sound (S31).

  When it is determined that the broadcast program cannot be received by the seek operation performed from the tuning frequency (f = f2) of the digital broadcast D2 (NO in S25), the control unit 20 proceeds to the process of step S26 described above. The process proceeds to check whether the jumping / seek flag is in the ON state (S26), and the above-described processing is repeated.

  When the user further instructs a seek operation in a state where the broadcast program is being broadcast by the digital broadcast D2 (S20), the control unit 20 confirms whether or not the received broadcast program is an analog broadcast. (S21). In this case, since the received broadcast program is broadcast by the digital broadcast D2 (NO in S21), the control unit 20 determines whether or not the jumping / seek flag is in the ON state (S26). In this case, the control unit 20 determines that the jumping / seek flag is ON because the jumping / seek flag is ON in step S23 described above (YES in S26), and turns off the jumping / seek flag. The state is set (S27).

  Then, the tuning frequency for performing the seek operation is changed from the current tuning frequency (f = f2) to the tuning frequency of the analog broadcast A2 stored in the storage unit 24 in association with the tuning frequency (f = f2) of the digital broadcast. The frequency is changed to (f = f4 + Δf) obtained by adding a predetermined frequency interval Δf to (f = f4) (S28). Then, the control unit 20 determines whether or not a broadcast program is received at the frequency (f = f4 + Δf) (S30). In this case, referring to FIG. 2, since neither digital broadcasting nor analog broadcasting is performed (NO in S30), the control unit 20 further increases the searched frequency (f = f4 + Δf) according to a predetermined rule. The predetermined frequency interval Δf is added (S29), and it is determined whether or not the broadcast program is received again. The control unit 20 repeats such a seek operation (S29, S30). When the reception of a broadcast program by the analog broadcast A3, for example, is confirmed from the AM tuner 11 (YES in S30), the received analog broadcast A3 (tuning frequency f) = F5) is broadcasted (S31).

  When the user further instructs a seek operation while the broadcast program is being broadcast by the analog broadcast A3 (S20), the control unit 20 confirms whether the received broadcast program is an analog broadcast or not. (S21). In this case, since the broadcast program to be received is broadcast by the analog broadcast A3 (YES in S21), it is determined whether or not the tuning frequency of the digital broadcast corresponding to the analog broadcast A3 is stored in the storage unit 24 ( S22: Determination means). In this case, since the tuning frequency of the digital broadcast corresponding to the analog broadcast A3 is not stored in the storage unit 24 (NO in S22), the control unit 20 determines whether or not the jumping / seek flag is in the ON state. (S26). In this case, since the jumping / seek flag is in the OFF state, it is determined that the jumping / seek flag is in the OFF state (NO in S26), and the control unit 20 performs the analog broadcast A3 currently received according to a predetermined rule. The predetermined frequency interval Δf is further added to the tuning frequency (f = f5) (S29), and it is determined whether or not the broadcast program has been received again. When the control unit 20 repeats such a seek operation (S29, S30) and confirms reception of a broadcast program by the digital broadcast D1 from the AM tuner 11 (YES in S30), the received digital broadcast D1 (tuning frequency f) = F6) is broadcasted (S31).

  When the user further instructs a seek operation in a state where the broadcast program is broadcast by the digital broadcast D1 (S20), the control unit 20 confirms whether or not the received broadcast program is an analog broadcast. (S21). In this case, since the received broadcast program is broadcast by the digital broadcast D1 (NO in S21), the control unit 20 determines whether or not the jumping / seek flag is in the ON state (S26). In this case, since the jumping / seek flag is in the OFF state, it is determined that the jumping / seek flag is in the OFF state (NO in S26), and the control unit 20 performs the digital broadcast D1 currently received according to a predetermined rule. The predetermined frequency interval Δf is further added to the tuning frequency (f = f6) (S29), and it is determined whether or not the broadcast program has been received again. The control unit 20 repeats such a seek operation (S29, S30). Upon confirming reception of a broadcast program by, for example, the digital broadcast D4 from the AM tuner 11 (YES in S30), the received digital broadcast D4 (tuning frequency f) = F7) is output as audio (S31).

  Thereafter, each time the user performs an operation on the seek operation with the control unit 20, the processing from the above-described steps S20 to S31 is repeated. Such a seek operation can be performed up to a predetermined upper limit frequency of the medium wave band.

  In the radio receiving apparatus 100 that performs the seek operation as described above, the audio from the analog broadcast A1 program is output (YES in S21), and the program is sent from the ABC broadcast station that is the same broadcast station as the analog broadcast A1 program. Whether or not there is a digital broadcast D1 of the same program is stored in association with the tuning frequency (f = f1) of analog broadcasting of the same program from the ABC broadcasting station and the tuning frequency (f = f6) of digital broadcasting. It is determined based on the analog / digital correspondence table of the storage unit 24 (S22), and it is determined that there is a digital broadcast D1 of the same program from the ABC broadcast station that is the same broadcast station as the broadcast station that broadcasts the analog broadcast A1 program. (YES in S22), the tuning frequency (f = f1) in the seek operation starting from the tuning frequency (f = f1) of the analog broadcast A1 program. Is changed to the tuning frequency (f = f6) of the program of the digital broadcast D1 regardless of a predetermined rule (S28). Therefore, the digital broadcast D1 that cannot be received unless the seek operation is performed at least five times. Can be received in one operation. Therefore, the same program as the analog broadcast A1 program being received can be received more quickly by the digital broadcast D1, and a seek operation more favorable to the user is possible.

  In addition, in the radio receiving apparatus 100 that performs the seek operation as described above, in the seek operation started in a state where the audio of the digital broadcast D1 program received by the seek operation is being output (NO in S21), the digital broadcast is performed. Since the tuning frequency (f = f6) of D1 is changed to the frequency (f = f1 + Δf) after the tuning frequency (f = f1) of the analog broadcast A1 (NO in S26, S27, S28), the tuning frequency of the analog broadcast A1 Even if the seek operation is performed after changing (f = f1) to the tuning frequency (f = f6) of the digital broadcast D1, the tuning frequency (f = f) of the analog broadcast A1 before the tuning frequency is changed. f1) Since the broadcast stations are sequentially sought in accordance with a predetermined rule starting from the subsequent frequency (f = f1 + Δf) (S29, S30), analog broadcasting A broadcast program broadcast at any of the tuning frequencies between the tuning frequency of A1 (f = f1) and the tuning frequency of digital broadcasting D1 (f = f6) and a broadcasting station that broadcasts the program can be sought. It can be prevented from disappearing. Therefore, it is not always desirable to receive a digital broadcast after receiving an analog broadcast, but a normal seek operation can be performed when a seek operation is performed again when searching for another broadcast. Become.

  Furthermore, in the radio receiving apparatus 100 that performs the seek operation as described above, it indicates that there was a seek operation from the analog broadcast A1 program to the same program of the digital broadcast D1 from the same ABC broadcast station as the analog broadcast A1. When the jumping / seek flag is in the ON state (YES in S26), in the seek operation started with the audio output of the received digital broadcast D1 being made, the tuning frequency (f = f6) is set according to a predetermined rule. Since the frequency is changed to the frequency (f = f1 + Δf) after the tuning frequency (f = f1) of the analog broadcast A1, only when the jumping seek flag is ON (jump seek information is stored) Between the tuning frequency (f = f1) of the broadcast A1 and the tuning frequency (f = f6) of the digital broadcast D1 It is possible to prevent the it becomes impossible to seek a broadcasting station that broadcasts a broadcast program and the program is broadcast in any of the tone frequency. Therefore, only when the jumping / seek flag is in the ON state, a normal seek operation can be performed when a seek operation is performed again when searching for another broadcast, and thus a seek operation more favorable to the user is possible.

  In the process in step S28, the tuning frequency for performing the seek operation is stored in the storage unit 24 in association with the tuning frequency (f = f6) of the digital broadcast D1 from the current tuning frequency (f = f6). The frequency is changed to a frequency (f = f1 + Δf) obtained by adding a predetermined frequency interval Δf to the tuning frequency (f = f1) of the analog broadcast A1. For example, in step S23, the tuning frequency (f = f1) of the analog broadcast A1 is changed. May be skipped to the tuning frequency (f = f6) of the program of the digital broadcast D1 changed to the tuning frequency (f = f6) of the program of the digital broadcast D1, and the seek operation may be performed. As a result, other broadcast stations can be searched without searching for the tuning frequency of the digital broadcast once sought, and in this case as well, a seek operation that is more preferable for the user is possible.

  In the above-described seek operation in the radio receiving apparatus 100, the tuning frequency is sequentially increased. However, the seek operation may be gradually decreased. For example, in a state where a broadcast program is being broadcast by the analog broadcast A2 (S20), when the user further instructs a seek operation, the control unit 20 stores the tuning frequency of the digital broadcast corresponding to the analog broadcast A2 in the storage unit 24. It is determined whether or not it is stored (YES in S21, S22). As a result, the storage unit 24 stores the tuning frequency (f = f2) of the digital broadcast D2 that broadcasts the same program associated with the tuning frequency (f = f4) of the analog broadcast A2 by the DEF broadcast station. When the determination is made (YES in S22), the control unit 20 turns on the jumping / seek flag (S23), and the seek operation is performed from the tuning frequency (f = f2) of the digital broadcast D2 stored in the storage unit 24. It changes so that it may perform (S24), and the audio | voice output of the broadcast program of the received digital broadcast D2 is carried out (it is YES at S25, S31). Even when the tuning frequency is sequentially lowered in this way, the processing as described above is performed.

  In the seek operation, the tuning frequency is sequentially changed step by step by the frequency interval Δf between the analog broadcast and the digital broadcast for the same program from the same broadcast station. The interval is not particularly limited as long as it is equal to or less than the minimum frequency interval of broadcasting made by a broadcasting station.

  The broadcast information displayed on the display unit 22 is not limited to the broadcast station name and the program name. If the information is about the broadcast program, the broadcast information includes other matters such as explanation of the broadcast content and broadcast time zone. Or only the other matter may be sufficient.

  As described above, the present invention has an effect of enabling a seek operation more preferable for the user in a radio receiver capable of receiving both digital broadcast and analog broadcast. Both can be received, and are useful as a radio receiver that performs a seek operation to search for a broadcast program to be received by sequentially changing the tuning frequency.

DESCRIPTION OF SYMBOLS 11 AM tuner 12 Demodulation circuit 13 Digital broadcast processing unit 14 Analog broadcast processing unit 15 Output circuit 16 Speaker 20 Control unit 21 Operation unit 22 Display unit 23 Broadcast information extraction unit 24 Storage part 100 Radio receiver

Claims (4)

A broadcast program that is capable of receiving a digital broadcast and an analog broadcast in a predetermined frequency band, performs a seek operation to search for a broadcast program received by sequentially changing the tuning frequency according to a predetermined rule, and is received by the seek operation A radio receiver that outputs the sound of
Storage means for storing the correspondence between analog broadcasting and digital broadcasting of the same program from the same broadcasting station;
Based on the correspondence stored in the storage means whether or not there is a digital broadcast of the same program from the same broadcasting station as the analog broadcast in a state where the audio output of the received analog broadcast program is being made. Determination means for determining;
When the determination means determines that there is a digital broadcast of the same program from the same broadcast station as the analog broadcast, the tuning frequency is set to the predetermined frequency in a seek operation started from the tuning frequency of the analog broadcast program. Seek operation control means for changing to the tuning frequency of the digital broadcast program regardless of the rules ;
In a seek operation started in a state where audio output of the digital broadcast program received by the seek operation is being performed, the tuning frequency is set to the analog frequency according to the predetermined rule.
And a return seek operation control means for changing the frequency to a frequency after the broadcast tuning frequency .   The radio receiving apparatus according to claim 1, wherein the storage means stores both tuning frequencies of analog broadcasting and digital broadcasting of the same program from the same broadcasting station in association with each other. Jump seek storage means for storing jump seek information indicating that there has been a seek operation from the analog broadcast program to the same digital broadcast program from the same broadcast station as the analog broadcast;
The return seek operation control means, in the seek operation started in a state in which the received digital broadcast audio is being output when the jump seek information is stored in the jump seek storage means, The radio receiver according to claim 1 or 2 , wherein the tuning frequency is changed to a frequency after the tuning frequency of the analog broadcast according to a rule. Based on information on receivable broadcast programs obtained by sequentially changing the tuning frequency without outputting the sound of the broadcast program, the storage means stores the correspondence between the analog broadcast and the digital broadcast of the same program from the same broadcast station. radio receiving apparatus according to any one of claims 1 to 3 comprising means to be stored in.

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