JPH11340792A - Receiver for digital audio broadcast - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a receiver for digital audio broadcast which can select a favorite broadcast program to be listened to without any troublesome operation. SOLUTION: A broadcast signal of DAB(digital audio broadcast) selected and received at a front end part 2 is demodulated and supplied to a selective decoding part 6. The selective decoding part 6 extracts one of broadcast programs multiplexed in the channel-selected broadcast signal of DAB according to program selection information which is stored in a program selection information memory 35 and which indicates a broadcast program to be selected preferentially and discrimination information on the broadcast program added to the channel-selected broadcast signal of DAB.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver suitable for receiving digital audio broadcasting.

[0002]

2. Description of the Related Art In recent years, digitalization of audio broadcasting has become active. In Europe, digital audio broadcasting (D-D) of European standard (Eureka 147) has been adopted.
AB: Digital Audio Broadcas
t) is being provided.

[0003] This digital audio broadcast can provide audio information with high quality sound quality without deteriorating the quality of the audio information, and multiplexes audio data and additional data of a plurality of broadcast programs into one broadcast wave. By broadcasting a so-called ensemble signal, it is possible to provide high value-added broadcasting such that one broadcast wave (ensemble signal) can provide more broadcast programs.

For example, news, traffic information, weather forecast,
Different broadcast programs such as sports programs, music programs (pops), and music programs (classical) are multiplexed to form an ensemble signal. In the ensemble signal, information on multiplexing indicating what kind of multiplexing was performed, information on each multiplexed broadcast program, and information such as identification information for identifying each broadcast program are also inserted. I have. By using a digital audio broadcast receiver, an ensemble signal can be received, and a desired broadcast program can be selected and listened to from among a plurality of broadcast programs multiplexed with the ensemble signal. It has been like that.

[0005]

By the way, in the case of digital audio broadcasting, since an ensemble signal in which a plurality of broadcast programs are multiplexed is broadcast as described above, a target ensemble signal is selected. After that, it is necessary to select a desired broadcast program from a plurality of broadcast programs multiplexed with the ensemble signal.

For this reason, in a digital audio broadcast receiver, the broadcast program multiplexed with the ensemble signal is used by using the identification information of the multiplexed broadcast program included in the selected ensemble signal. Is created and displayed on a display element such as an LCD (Liquid Crystal Display) provided in the receiver, and also receives a selection input of a broadcast program from a listener. The listener refers to the displayed list of broadcast programs and selects a desired broadcast program.

[0007] However, the listener must select one broadcast program from a large number of broadcast programs multiplexed in the ensemble signal, and the operation of selecting the program becomes complicated, and the desired broadcast program is selected. It is considered that it may take time and effort to select a program. In particular, when a digital audio broadcast receiver is mounted on a car, it is dangerous to perform a complicated broadcast program selection operation while driving while looking at the list of broadcast programs displayed on the display element of the receiver. is there.

In view of the above, it is an object of the present invention to provide a digital audio broadcast receiver capable of selecting and listening to a desired broadcast program without performing a complicated operation.

[0009]

According to a first aspect of the present invention, there is provided a digital audio broadcast receiver for multiplexing a plurality of broadcast programs and multiplexing each of the plurality of broadcast programs. A tuner section for receiving and selecting a digital audio broadcast signal to which identification information indicating the content of the digital audio broadcast signal is added, and a broadcast program to be preferentially selected from among the plurality of broadcast programs multiplexed on the digital audio broadcast signal A program selection information storage unit for storing and holding program selection information for instructing the digital audio broadcast signal received and tuned by the tuner unit, the program selection information storage unit for the program selection information storage unit, A program selection unit for extracting a broadcast program based on the identification information in the audio broadcast signal.

According to the digital audio broadcast receiver of the first aspect of the present invention, the digital audio broadcast signal received and selected by the tuner section is multiplexed together with a plurality of broadcast programs. The identification information indicating the content of each of the plurality of broadcast programs is added thereto, and is supplied to the program selection unit.

The program selection section includes program selection information stored in the program selection information storage section for indicating a broadcast program to be preferentially selected, and broadcast program identification information added to the digital audio broadcast signal. , One of the broadcast programs multiplexed with the digital audio broadcast signal selected and received is extracted. The extracted broadcast program is reproduced and provided to the listener.

[0012] Thereby, the listener can preferentially select a plurality of broadcast programs multiplexed on the digital audio broadcast signal based on the program selection information stored in the program selection information storage section. Automatically select programs,
You will be able to listen. Therefore, the listener does not have to perform a complicated operation to select one broadcast program from a plurality of broadcast programs.

A digital audio broadcast receiver according to a second aspect of the present invention is the digital audio broadcast receiver according to the first aspect, wherein the program selection information storage section stores a geographical condition. In this geographical situation, the correspondence with the broadcast program to be selected preferentially is stored as program selection information, and position information indicating the position of the transmitting station of the digital audio broadcast signal added to the digital audio broadcast signal Position information detecting means for detecting a position of the digital audio broadcast signal based on a detection output of the position information detecting means, and a correspondence between the position and the geographical condition is stored. Based on the received geographic information storage unit and the reception position detected by the reception position detection unit, from the geographic information storage unit to the reception position Geographical situation detecting means for detecting the corresponding geographical situation, and wherein the program selecting unit is configured to store the program in the program selecting information storage unit corresponding to the geographical situation detected by the geographical situation detecting means. A broadcast program is extracted from the digital audio broadcast signal based on the selection information and the identification information in the digital audio broadcast signal.

According to the digital audio broadcasting receiver of the present invention, the program selection information storage unit stores, for example, a geographical situation such as an urban area, a suburb, a mountain, and a coast, and each geographical situation. Are stored as program selection information. The geographic information storage unit stores the correspondence between the position and the geographical situation.

The position information of the transmitting station of the digital audio broadcast signal added to the digital audio broadcast signal selected and received by the tuner section is detected by the position information detecting means, and the receiving position is determined based on the position information. The receiving position of the listener who is tuned to the digital audio broadcast signal is detected by the detecting means. Based on the detected receiving position, the geographical condition detecting means detects the geographical condition of the receiving position stored in the geographic information storage unit.

[0016] The program selection section selects program selection information corresponding to the geographical situation at the reception position detected by the geographical situation detection means, among the program selection information stored in the program selection information storage section. Based on the identification information in the selected digital audio broadcast signal, a broadcast program according to the geographical situation around the reception position is automatically selected and can be heard.

[0017] Thus, the listener can understand the geographical location of the receiving position, for example, traffic information in a city area, a pop music program in a suburban area, or a classical music program in a mountain area. According to the situation, a broadcast program that is preferentially selected can be automatically selected and listened to.

A digital audio broadcast receiver according to a third aspect of the present invention is the digital audio broadcast receiver according to the first aspect, wherein the program selection information storage section stores information relating to time. The correspondence with a broadcast program selected preferentially at a time corresponding to the information on the time is stored as program selection information, and a current time detecting means for detecting a current time when receiving the digital audio broadcast signal is provided. The program selection unit, based on the program selection information of the program selection information storage unit corresponding to the current time detected by the current time detection unit, based on the identification information in the digital audio broadcast signal, A broadcast program is extracted from the digital audio broadcast signal.

According to the digital audio broadcast receiver of the present invention, the program selection information storage section stores, for example, information such as morning, afternoon, or from xx am to xx pm. Correspondence between information about a specific time and a broadcast program to be preferentially selected at a time corresponding to the information about the time is stored as program selection information.

The current time at the time of receiving the digital audio broadcast signal is detected by the current time detecting means. The program selection information corresponding to the detected current time is read from the program selection information storage unit, and based on the read program selection information and the identification information in the received and tuned digital audio signal, One broadcast program is extracted from the broadcast programs multiplexed with the digital audio broadcast signal selected and received.

Thus, the listener does not need to perform a complicated program selection operation, for example, according to the reception time, such as traffic information during the work hours, pops in the afternoon, and classics during the return time, for example. Broadcast programs that are preferentially selected are automatically selected and provided to the listener.

A digital audio broadcast receiver according to a fourth aspect of the present invention is the digital audio broadcast receiver according to the first aspect, wherein the program selection information storage section stores a geographical condition. Correspondence between a combination with time-related information and a broadcast program to be selected by priority determined by this combination is stored as program selection information, and the transmitting station of the digital audio broadcast signal added to the digital audio broadcast signal Position information detecting means for detecting position information indicating the position of the digital audio broadcast signal, based on a detection output of the position information detecting means, a position detecting means for detecting a receiving position of the digital audio broadcast signal; Based on the geographic information storage unit in which the correspondence with the situation is stored and the reception position detected by the reception position detection unit, The geographic information storage unit includes: a geographic situation detection unit that detects information indicating the geographic situation corresponding to the reception position; and a current time detection unit that detects a current time. The program selection information of the program selection information storage unit determined by the geographical situation detected by the target situation detection means and the current time detected by the current time detection means, and the identification in the digital audio broadcast signal. A broadcast program is extracted from the digital audio broadcast signal based on the information.

According to the digital audio broadcasting receiver of the present invention, the program selection information storage unit stores, for example, a news program in the morning in an urban area and a music program in the afternoon in an urban area. As described above, the correspondence between the combination of the information on the geographical situation and the time and the broadcast program to be selected by priority determined by this combination is stored. The geographic information storage unit stores the correspondence between the position and the geographical situation.

The position information of the transmitting station of the digital audio broadcast signal added to the digital audio broadcast signal selected and received by the tuner section is detected by the position information detecting means, and the receiving position is determined based on the position information. The receiving position of the listener who is tuned to the digital audio broadcast signal is detected by the detecting means. Based on the detected receiving position, the geographical condition detecting means detects the geographical condition of the receiving position stored in the geographic information storage unit. In addition, the current time when the digital audio broadcast signal is received is detected by the current time detection means.

Then, the program selection unit detects the geographical state of the reception position detected by the geographical state detection unit from the program selection information stored in the program selection information storage unit and the current time detection unit. Based on the program selection information corresponding to the combination with the current time and the identification information in the digital audio signal being received and tuned,
A broadcast program according to the geographical situation of the receiving position is automatically selected and can be listened to.

Thus, taking the case of the above-mentioned city area as an example, if the reception position is in the city area and the current time is in the morning, the listener will receive a news program, and if the reception position is in the city area, If is the afternoon, a classic music program will be automatically selected and listened to. That is, a broadcast program can be automatically selected based on the geographical situation and the current time.

A digital audio broadcast receiver according to a fifth aspect of the present invention is the digital audio broadcast receiver according to the second or fourth aspect, wherein the digital audio broadcast signal comprises a plurality of digital audio broadcast signals. A phase detecting unit detects a phase shift between the plurality of digital audio broadcast signals transmitted from the plurality of transmitting stations, which are transmitted from the plurality of transmitting stations selected and received by the tuner unit. A shift detecting unit is provided, and the receiving position detecting unit detects the receiving position from a detection output of the position information detecting unit and a detection output of the phase shift detecting unit.

According to the digital audio broadcast receiver of the invention described in claim 5, one digital audio broadcast signal is simultaneously transmitted from a plurality of transmitting stations. For this reason, even for the same digital audio broadcast signal using a carrier wave of the same frequency, the reception timing at the receiver is shifted due to the different transmission stations. The phase shift of the digital audio broadcast signal caused by the difference between the transmitting stations is detected by the phase shift detecting means.

Then, based on the phase shifts of the digital audio broadcast signals transmitted from the plurality of transmitting stations detected by the phase shift detecting means and the position information of each transmitting station,
The receiving position is detected by the receiving position detecting means.

As a result, the receiving position on the receiving side can be detected more accurately, and one of a large number of broadcast programs multiplexed on the digital audio broadcast signal can be detected by using a geographical situation corresponding to the accurate receiving position. One broadcast program can be selected.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a receiver according to the present invention will be described with reference to the drawings. In the following embodiments, European standards (Eureka 14)
The case where the present invention is applied to an in-vehicle receiver for receiving digital audio broadcast (hereinafter, abbreviated as DAB) of 7) will be described as an example.

[First Embodiment] FIG. 1 shows a digital audio broadcasting receiver (hereinafter, referred to as a receiver) according to the first embodiment.
FIG. 2 is a block diagram for explaining a receiver). FIGS. 2 and 3 are diagrams for explaining DAB broadcast signals received by the receiver according to the first embodiment. First, before describing the receiver of this embodiment,
The outline of the DAB will be described with reference to FIGS.

DAB transmits an ensemble signal formed by multiplexing audio data and additional data of a plurality of broadcast programs with one broadcast signal. The audio data of a broadcast program multiplexed with the ensemble signal is encoded with high efficiency (data compression) using Layer II of MPEG audio, which is an international standard, and transmitted using convolutional coding for error correction. The path encoding is performed.

In the case of DAB, an interleaved coded bit string is interleaved, and orthogonal frequency division multiplexing modulation (OFDM: Orthogonal Frequency) is performed.
ncy Division Multiplex modulation)
And have been sent.

FIG. 2 is a diagram for explaining a frame structure of a DAB ensemble signal, and FIG. 3 is a diagram for explaining a DAB ensemble signal in which audio data of a plurality of broadcast programs is multiplexed. is there. The DAB broadcast signal is transmitted in frame units. As shown in FIG. 2, each frame is composed of synchronization symbols, FIC (first information channel), and MSC (main data channel).

Two synchronization symbols are prepared for synchronization. The Null symbol includes identification information (transmission station identification information) of the transmission station of the broadcast signal of the DAB.

The FIC is provided with three symbols, and information on data multiplexing such as how data is multiplexed and multiplexing of news, weather forecast, sports, pops (music program), and the like. It has various information such as identification information (program type) of the broadcast program being converted, position information (latitude and longitude information) of the transmitting station corresponding to the transmitting station identification information (TII), and the like.

As shown in FIG. 2, the MSC has a data field such as a broadcast program multiplexed on a time axis. That is, a plurality of audio data multiplexed with the DAB ensemble signal are data of each data field of the MSC.

Therefore, as shown in FIG. 3, the MSC of the DAB ensemble signal has different program types such as news, sports, pops (music program), thrashic (music program), and rock (music program). Audio data of a plurality of broadcast programs is multiplexed.

The information such as the program type is
As described above with reference to FIG. 2, the ensemble signal is included in the FIC of each frame. For this reason, the DAB receiver uses the information on the program type and multiplexing included in the FIC to convert the ensemble signal in which the audio data of a plurality of broadcast programs is multiplexed into the target broadcast program. The audio data is extracted, reproduced, and listened to.

Next, referring to FIG. 1, as described above, a D in which audio data of a plurality of broadcast programs are multiplexed.
A receiver of this embodiment for receiving an AB broadcast signal will be described.

As shown in FIG. 1, the receiver according to the first embodiment includes an antenna 1, a front-end section (tuner section) 2, a quadrature demodulator 3, a differential demodulator 4, a synchronization processor 5, Decoding section 6, audio decoding section 7, D / A conversion section 8, amplification circuit 9, speaker 10, information extraction section 11,
The system includes a system control microcomputer (hereinafter abbreviated as a system microcomputer) 20, a key operation unit 31, a clock circuit 32, an LCD controller 33, an LCD 34, and a program selection information memory 35.

Although not shown, the system microcomputer 20
This is a microcomputer including a CPU, a ROM, a RAM, a nonvolatile memory, and the like, and controls each unit of the receiver of this embodiment. The key operation section 31 has various operation keys such as a power on / off key, an input operation key for channel selection information, and a volume adjustment key, and accepts an instruction input operation from an operator of the receiver of the present embodiment. . Instruction information from the operator input through the key operation unit 31 is supplied to the system microcomputer 20 so that each unit of the receiver can be controlled according to the instruction information from the operator.

The clock circuit 32 has a calendar function, and can provide the current time and manage the day of the week and the date. Also,
The LCD controller 33 sends various guidance messages and the like to the LCD under the control of the system microcomputer 20.
34. As will be described later, various information to be notified to the operator of the receiver, such as the frequency of the selected broadcast signal and the current time, can be displayed on the LCD 34.

The receiver according to the present embodiment provides program selection information for designating a broadcast program to be preferentially selected from a plurality of broadcast programs multiplexed in the tuned DAB ensemble signal. Is stored in a non-volatile program selection information memory 35. The receiver according to this embodiment selects a program selection information memory 35 from a plurality of broadcast programs multiplexed on a tuned ensemble signal.
On the basis of the program selection information stored in the program, a broadcast program that is preferentially selected is automatically selected, reproduced, and provided to the user. Thus, the program selection information memory 35 is used as a program selection information storage unit.

Then, the DA received by the antenna 1
The broadcast signal of B is supplied to the front end unit 2. The front end unit 2 receives a target DA from the received broadcast signal based on a channel selection instruction from the system microcomputer 20.
The broadcast signal of B is selected, and the selected broadcast signal is converted into an intermediate frequency signal and supplied to the quadrature demodulator 3.

The quadrature demodulator 3 demodulates the I component and Q component signals of the baseband signal from the intermediate frequency signal, and supplies the demodulated signals to a differential demodulator 4 having an FFT (fast Fourier transform) circuit. I do. In this case, the differential demodulator 4 includes
A baseband signal converted to a digital signal is supplied. The differential demodulator 4 converts the signals of the I component and the Q component into OF signals.
DM demodulation is performed, and the DAB broadcast signal (ensemble signal) obtained by demodulation is supplied to the selective decoding unit 6 and the information extracting unit 11.

The synchronous processor 5 is configured as a DSP (digital signal processor), and receives a signal from the differential demodulator 4 to perform processing such as calculating a frequency offset of an input signal. , AFC (Auto
Omatic Frequency Control)
A signal is formed and output, or an impulse response of a transmission line is obtained to obtain a CIR (Channel Impulse
(Response) signal is formed and output.

The information extracting section 11 extracts necessary information such as information related to multiplexing of audio data and a program type of a multiplexed broadcast program from the FIC of each frame of the demodulated ensemble signal. Is supplied to the system microcomputer 20.

The selective decoding section 6 performs deinterleaving and error correction to obtain an original ensemble signal. Then, the selective decoding unit 6 receives the supply of the program selection information stored in the program selection information memory 35 through the system microcomputer 20, and based on the program selection information and the program type extracted from the IFC, Then, audio data of one broadcast program is selectively extracted from an ensemble signal in which audio data of a plurality of broadcast programs are multiplexed, and the extracted audio data is supplied to the audio decoding unit 7.

FIG. 4 is a diagram for explaining an example of the program selection information stored in the program selection information memory 35 of the receiver according to this embodiment. In this embodiment, the program selection information memory 35 stores, as shown in FIG.
Information indicating a priority and a program type of a broadcast program which is information indicating a priority selection program corresponding to the priority are stored.

As shown in FIG. 4, the program selection information memory 3
5 stores the program type of the broadcast program in the order of priority in the order of news program, classical (music program), pops (music program)... in this case,
First, the system microcomputer 20 reads program selection information (program type) for instructing to select a news program with the highest priority from the program selection information memory 35.

The system microcomputer 20 includes an information extraction unit 11
A program for confirming whether or not a news program is included in the selected ensemble signal based on the information extracted and provided from the FIC, and instructing to select the news program when it is included, The selection information is supplied to the selection decoding unit 6. The selective decoding unit 6 extracts the audio data of the news program from the selected ensemble signal based on the program selection information from the system microcomputer 20, and supplies the extracted audio data to the audio decoding unit 7.

When the selected ensemble signal does not include a news program, the system microcomputer 2
0 indicates that the program selection information instructing to select the second classical music (music program) is read from the program selection information memory 35, and the selected ensemble signal is selected based on the information from the information extraction unit 11. It is checked whether or not a classic (music program) is included, and if it is included, program selection information instructing to select the classic (music program) is supplied to the selection decoding unit 6.

As described above, the system microcomputer 20 supplies the program selection information stored in the program selection information memory 35 to the selective decoding section 6. As a result, the selective decoding unit 6 outputs the program selection information memory 3 of the audio data of a plurality of broadcast programs multiplexed into the ensemble signal.
5, the audio data of the broadcast program corresponding to the program selection information is preferentially extracted from the ensemble signal, and the extracted audio data is extracted from the audio decoding unit 7 as described above.
To supply. That is, the selective decoding unit 6 has a function as a program selecting unit.

The audio decoding section 7 decompresses and decompresses the audio data which has been compressed by the MPEG audio system and multiplexed into the ensemble signal as described above, and supplies this to the D / A conversion circuit 8. The D / A conversion circuit 8 converts digital audio data into an analog signal, and supplies the analog signal to the speaker 10 through the amplification circuit 9. Thereby, based on the program selection information in the program selection information memory 35, the audio data of the broadcast program selected with priority is reproduced and emitted from the speaker 10.

FIG. 5 shows that, in the receiver of the first embodiment, one broadcast program is selected from the ensemble signal of the selected DAB by using the program selection information of the program selection information memory 35 as described above. It is a flowchart for demonstrating the automatic program selection process which selects automatically.

The processing shown in FIG. 5 is performed when the reception of the DAB broadcast signal is started, for example, when the power of the receiver of the first embodiment is turned on or when the selection of the DAB broadcast signal is changed. System microcomputer 2 when the received signal changes
0.

When the processing shown in FIG. 5 is started, the system microcomputer 20 sets the program selection information memory 35
, One program selection information is read out from the one with the highest priority (step S101), and it is determined whether or not the audio data of the target broadcast program indicated by the read out program selection information is present in the ensemble signal (step S101). Step S102).

When it is determined in the determination processing of step S102 that the audio data of the target broadcast program does not exist in the ensemble signal, the readout position is positioned at the program selection information having the next highest priority (step S1).
03), repeat the processing from step S101.

If it is determined in step S102 that the audio data of the target broadcast program is present in the ensemble signal, the program selection information read from the program selection information memory 35 is supplied to the selective decoding unit 6 ( Step S104), the processing shown in FIG. 5 ends.

As described above, the program selection information indicating the broadcast program to be selected preferentially, which is prepared in advance in the program selection information memory 35, is supplied to the selective decoding unit 6, and based on this program selection information, The decoding unit 6 automatically selects audio data of a target broadcast program from the ensemble signal, reproduces the audio data, and emits the audio data from the speaker 10.

In this case, the user of the receiver of the first embodiment presses the power on / off key of the first receiver to turn on the power, and the reception of the DAB broadcast signal is started. Or by pressing the channel selection operation key after the power is turned on to change the channel selection of the DAB broadcast signal, without performing complicated program selection, and without selecting a complicated program. , A broadcast program can be automatically selected based on the program selection information stored therein, and audio data of the broadcast program can be reproduced and listened to.

Therefore, when driving an automobile on which the receiver of the first embodiment is mounted, for example, a broadcast program displayed on the LCD 34 of the receiver of the first embodiment during driving. The DAB ensemble signal is received without performing an operation of selecting a target broadcast program while referring to the list, and a program selection information memory 35 is selected from a plurality of broadcast programs multiplexed with the ensemble signal. The broadcast program selected preferentially by the program selection information can be automatically selected and listened to.

[Modification of First Embodiment] A broadcast program to be preferentially selected from a plurality of broadcast programs multiplexed in a DAB ensemble signal is changed according to a reception time zone. For example, the broadcast program to be automatically selected can be changed according to the reception time. In this case, the program selection information considering the time information is stored in the program selection information memory 35.

FIG. 6 is a diagram for explaining an example of the program selection information stored in the program selection information memory 35 in which time information is taken into account. In the case of the example shown in FIG.
The correspondence between the time information indicating the time zone and the program type of the broadcast program selected preferentially in each time zone is stored in the program selection information memory 35 as the program selection information.

That is, as shown in FIG. 6, the program selection information memory 35 stores traffic information from 6:00 am to 9:00 am and pops (music program) from 9:00 am to 5:00 pm. , From 5pm to 7pm, news,
After 7:00 pm, program selection information for preferentially selecting a classic (music program) is stored.

As shown in FIG. 1, a clock circuit 32 is mounted on the receiver according to the first embodiment. Therefore, the system microcomputer 20 detects the current time from the clock circuit 32 immediately after turning on the power to the receiver or immediately after changing the channel selection of the DAB broadcast signal after turning on the power. Thus, the system microcomputer 2
“0” has a function as a current time acquisition unit that acquires the current time from the clock circuit 32.

The system microcomputer 20 reads out the program selection information from the program selection information memory 35 based on the detected current time, and supplies it to the selective decoding section 6. Thus, for example, when the current time is in the work hours from 7:00 am to 9:00 am, of the broadcast programs multiplexed with the ensemble signal of the selected DAB, the traffic information is given priority. And it is automatically selected.

Similarly, when the current time is from 9:00 am to 5:00 pm, the pop (music program) is displayed, and when the current time is from 5:00 pm to 7:00 pm, the news is transmitted. , After 7:00 pm, classical music programs will be given priority and
Selected automatically.

FIG. 7 shows a DAB selected by using the program selection information of the program selection information memory 35 in consideration of the reception time.
7 is a flowchart for describing an automatic program selection process for automatically selecting one broadcast program from the ensemble signal of FIG. The processing shown in FIG. 7 is also performed when the power of the receiver of the first embodiment is turned on or when the channel selection of the DAB broadcast signal is changed, similarly to the processing described with reference to FIG. , Is executed by the system microcomputer 20 when the reception of the DAB broadcast signal starts or when the received signal changes.

Then, when the processing shown in FIG. 7 is started,
First, the system microcomputer 20 detects the current time from the clock circuit 32 (step S201). Next, the system microcomputer 20 reads the program selection information from the program selection information memory 35 based on the detected current time (step S202), and the broadcast program indicated by the read program selection information is stored in the selected DAB. A search is made to determine whether the signal is multiplexed with the ensemble signal (step S203).

As described above, the system microcomputer 20
The information extraction unit 6 provides necessary information such as information on multiplexing of data included in the FIC of each frame of the ensemble signal and the program type of a multiplexed broadcast program. , It is possible to search whether the broadcast program indicated by the program selection information is multiplexed with the ensemble signal.

Then, it is determined whether or not the broadcast program indicated by the program selection information has been found, that is, whether the broadcast program indicated by the program selection information has been multiplexed (step S20).
4). If it is determined in step S204 that the broadcast program indicated by the program selection information has not been found, the processing from step S203 is repeated, and the search for the broadcast program indicated by the program selection information is continued.

When it is determined in step S204 that the broadcast program indicated by the program selection information has been found, the program selection information is supplied to the selection decoding section 7 (step S205), and the processing shown in FIG. .

Thus, in the selective decoding unit 7,
As described above, the original ensemble signal is obtained by performing deinterleaving and error correction, and audio data of one broadcast program is selectively extracted from the ensemble signal based on the program selection information from the system microcomputer 20, This is supplied to the audio decoding unit 7.

Then, in the audio decoding unit 7,
The audio data compressed by the MPEG audio system is decompressed and converted into an analog signal by a D / A conversion circuit 8, and is converted to an analog signal by an amplification circuit 9.
0, and the audio of the selected broadcast program is output to the speaker 1
Sound is emitted from 0.

As described above, based on the program selection information in the program selection information memory 35, it is possible to automatically select a broadcast program to be preferentially selected according to the time zone.
In this case, since different broadcast programs can be selected according to the time zone, more detailed automatic selection of the broadcast programs can be performed.

The receiver according to the first embodiment has
The user of the receiver can change the program selection information stored in the program selection information memory 35. Details of the change of the program selection information will be described later.

The receiver according to the first embodiment has
A list of broadcast programs multiplexed into the ensemble signal is displayed on the LCD 34 based on information on multiplexing of data extracted from the IFC of the ensemble signal, information on the program type of the multiplexed broadcast program, and the like. Through this list, the operator of the receiver of this embodiment can select a broadcast program.

The manual program selection performed by the operator of the receiver and the automatic program selection performed based on the program selection information in the program selection information memory 35 as described above can be switched and used. ing. The details of the use of the program selection and the automatic program selection in this manual will be described later in detail.

[Second Embodiment] As described above with reference to FIG. 2, the Null symbol of each frame of the DAB broadcast signal includes identification information of the transmitting station transmitting the ensemble signal (transmitting station). Identification information). In addition, the FIC of each frame of the DAB broadcast signal includes position information (latitude and longitude information) of a plurality of transmitting stations transmitting receivable broadcast signals, and the FIC includes null symbol transmitting station identification information. The location information of the specified transmitting station is also included.

Therefore, the transmitting station of the selected DAB broadcast signal can be specified based on the transmitting station identification information in the null symbol and the position information of the transmitting station in the FIC. In the case of DAB, a large number of transmitting stations transmitting low-power broadcast signals are arranged in a network, and broadcasting is performed. Based on the position of the transmitting station of the DAB broadcast signal selected and received. Thus, the approximate receiving position can be known.

Focusing on this point, the receiver according to the second embodiment detects, for example, the geographical condition of the reception position of the DAB broadcast signal. In order to select the news preferentially, and to select a classic (music program) preferentially in the suburbs, it is multiplexed with the DAB broadcast signal in consideration of the geographical situation of the receiving position. The selected broadcast program is automatically selected.

FIG. 8 is a block diagram for explaining a receiver according to the second embodiment. As shown in FIG.
The receiver according to the second embodiment includes an antenna 1, a front end unit 2, a quadrature demodulator 3, a differential demodulator 4, a synchronization processor 5, a selective decoding unit 6, an audio decoding unit 7,
/ A conversion section 8, amplification circuit 9, speaker 10, transmitting station identification information detection section 12, position information detection section 13, system control microcomputer (system microcomputer) 20, key operation section 31, clock circuit 32, LCD controller 33 ,
An LCD 34, a geographic information memory 36, and a program selection information memory 37 are provided.

As described above, the receiver according to the second embodiment includes a transmitting station identification information detecting section 12 and a position information detecting section 1.
3, geographic information memory 36, program selection information memory 37
The configuration is substantially the same as that of the receiver according to the first embodiment described above with reference to FIG. For this reason, in the case of the receiver of the second embodiment shown in FIG. 8, the same reference numerals are given to the same components as those of the receiver of the first embodiment, and Is omitted.

In the second embodiment, the transmitting station identification information detecting section 12 extracts the transmitting station identification information contained in the null symbol of the ensemble signal tuned and demodulated, and extracts this information from the system microcomputer. 20.

The position information detecting section 13 is used to transmit the position information of the transmitting station included in the FIC of the ensemble signal demodulated and demodulated, information on multiplexing of audio data, and the program type of the multiplexed broadcast program. And other necessary information, and supplies the extracted information to the system microcomputer 20.

Based on the transmission station identification information from the transmission station identification information detecting section 12 and the position information from the position information detecting section 13, the system microcomputer 20 allows the receiver of the second embodiment to select a receiving station. The position (latitude / longitude) of the transmitting station of the DAB broadcast signal is specified, and the receiving position of the receiver of the second embodiment can be detected based on the position of the transmitting station. You.

The receiver according to the second embodiment has
As described above, in order to automatically select a broadcast program from a DAB ensemble signal that has been selected and demodulated according to the geographical situation of the reception position, the system includes the geographic information memory 36 and the program selection information memory 37. These geographic information memories 36
The program selection information memory 37 is a non-volatile memory. FIG. 9 is a diagram for explaining the geographic information memory 36, and FIG. 10 is a diagram for explaining the program selection information memory 37.

As shown in FIG. 9, the geographic information memory 36 stores a geographic information database including position information (latitude and longitude information) and an information capital indicating the geographical situation corresponding to the position information. In the second embodiment,
The position information in the geographic information memory 36 does not simply indicate a point, but is so-called area information for specifying an area to which the reception position of the receiver of the second embodiment that receives the DAB broadcast signal belongs. It is.

Accordingly, the location information in the geographic information memory 36 is, for example, an area several kilometers in radius around the location information of the transmitting station of the broadcast signal of the DAB being selected and received.
Alternatively, it is information that can specify an area including a reception position of a receiver receiving a DAB broadcast signal, such as an area specified by longitude and latitude information of a plurality of points. The geographic situation is information indicating the geographic situation of an area (region) indicated by the position information (area information).

In the second embodiment, DAB
The receivable area of the broadcast signal transmitted from the transmitting station of
From the transmission power of the broadcast signal, etc., it is possible to know the approximate distance, and if the position of the transmitting station of the DAB broadcast signal selected and received by the receiver is known, the broadcast signal of the DAB is transmitted. The receiving position of the receiving receiver can be narrowed down to some extent.

As described above, the DAB employs a form in which a large number of transmitting stations for transmitting low-power broadcast signals are arranged in a network to perform broadcasting, and the geographical situation in the receivable area is also limited. Can be specified to some extent. Therefore, in the second embodiment, as shown in FIG. 9, information indicating a receivable area of a broadcast signal from a transmitting station of a DAB broadcast signal selected and received by a receiver is represented by position information. For the geographical situation, a geographical information database including information indicating the geographical situation of the receivable area indicated by the position information is created in the geographic information memory 36.

Thus, if the area to which the receiving position of the receiver belongs is specified based on the position (latitude and longitude) of the transmitting station of the DAB broadcast signal selected for reception, the area to which the receiving position belongs, That is, the geographical situation around the receiving position can be known from the information indicating the geographical information in the geographical information memory 36. In the second embodiment, as shown in FIG. 9, it is possible to detect a geographical situation around a reception position (current position) such as an urban area, a suburb, a mountain, a shore, and a plateau.

Further, in the second embodiment, as shown in FIG. 10, the program selection information memory 37 stores the geographical situation and the program type of the broadcast program to be preferentially selected in the geographical situation. Is stored as a program selection information.
Therefore, as described above, if the geographical condition around the receiving position is detected using the geographical information memory 36, the broadcast program to be preferentially selected according to the detected geographical condition around the receiving position. Can be read from the program selection information memory 37.

Then, by supplying the program selection information read out from the program selection information memory 37 to the selection decoding section 6, a broadcast program according to the geographical situation around the reception position is obtained.
It is preferentially selected and played as described above so that it can be heard.

Next, an automatic program selection process performed by the receiver according to the second embodiment for automatically selecting a broadcast program according to the geographical situation around the reception position with reference to the flowchart of FIG. Will be described.

The automatic program selection processing shown in FIG. 11 is performed when the power of the receiver of the second embodiment is turned on or when the DA is turned on, as in the case of the receiver of the first embodiment.
This is executed by the system microcomputer 20 when the reception of the DAB broadcast signal starts or when the received signal changes, such as when the selection of the B broadcast signal is changed.

When the processing shown in FIG. 11 is executed, the system microcomputer 20 outputs the broadcast signal of the selected DAB from the Null symbol of the tuned and demodulated ensemble signal through the transmitting station identification information detecting unit 12. Of the transmitting station is detected (step S301). Further, the system microcomputer 20 detects the position information (latitude / longitude information) of a plurality of transmitting stations included in the FIC of the tuned and demodulated ensemble signal through the position information detection unit 13 (step S302). ).

The system microcomputer 20 obtains, from the detected information, the position information of the transmitting station of the reception-selected DAB broadcast signal specified by the transmitting station identification information,
The receiving position (the area to which the receiving position belongs) of the receiver according to the second embodiment that receives the broadcast signal transmitted from the transmitting station is specified (step S303).

Then, based on the specified reception position, the system microcomputer 20 stores the geographic information memory 3 shown in FIG.
With reference to the geographic information database of No. 6, information (terrain information) indicating the geographical situation around the reception position is searched (step S304). Then, in the search processing of step S304, it is determined whether or not information indicating the geographical situation around the specified receiving position is found (step S305).
If it is determined that no data has been found, step S30
The processing from step 4 is repeated to continue searching for information indicating the geographical situation.

In the determination processing of step S305, when it is determined that the information indicating the geographical condition of the receiving position has been found, based on the information indicating the geographical condition of the receiving position found as a result of the search, the program selection information memory 37 is stored. With reference to the program selection database, program selection information of a broadcast program to be preferentially selected according to the geographical situation of the reception position is searched (step S306).

Then, in the search processing of step S304, it is determined whether or not the program selection information of the broadcast program to be preferentially selected according to the geographical situation of the reception position is found (step S307), and it is determined that it has not been found. If so, the processing from step S306 is repeated, and the search for the program selection information is continued.

If it is determined in step S307 that the program selection information has been found, the program selection information found as a result of the search is supplied to the selection decoding unit 6 (step S308), and the processing shown in FIG. 11 ends. I do.

Thus, as described above with reference to FIGS. 9 and 10, when the reception position is detected to be in an urban area, a news program is selected from the demodulated DAB ensemble signal. The selected program selection information is supplied to the selection demodulation unit 6. Similarly, when the reception position is detected to be a suburb, the classic (music program) is supplied to the selection decoding unit 6, and when the reception position is detected to be a mountain, program selection information for selecting a sports program is supplied to the selection decoding unit 6. Is done.

When the reception position is detected to be on the coast, the lock (music program) is selected, and when the reception position is detected to be a plateau, the program selection information for selecting pops (music program) is selectively decoded. Is supplied to the conversion unit 6.

As described above, the program selection information indicating the broadcast program to be preferentially selected is supplied from the system microcomputer 20 to the selection decoding section 6 in accordance with the geographical situation of the reception position. The audio data of the broadcast program is extracted from the tuned and demodulated DAB ensemble signal, reproduced, and listened to.

Thus, for example, when moving using an automobile equipped with the receiver of the second embodiment, a broadcast program corresponding to the geographical situation of the receiving position is automatically selected from the ensemble signal. You can listen to it.

[Modification of Second Embodiment] In addition to the geographical situation around the receiving position and the time of reception, the broadcasting program of a plurality of broadcast programs multiplexed with the DAB ensemble signal is also considered. Of these, the broadcast program to be preferentially selected can be changed.

FIG. 12 shows a program selection database formed in a program selection information memory 37 for changing a broadcast program to be preferentially selected according to a geographical situation around a reception position and a reception time. FIG.

As shown in FIG. 12, in the program selection information memory 37 of this example, information indicating a geographical situation, information indicating time in the morning and afternoon as information on time, information on the geographical information and information on time are stored. Are stored as program selection information.

That is, as shown in FIG. 12, for example, if the reception position is in an urban area and the reception time is in the morning, the broadcast program to be preferentially selected is news, and if the reception time is in the afternoon, The broadcast program to be preferentially selected is a classic (music program).

As described above, the program selection information memory 37 of the receiver of this example can change the program type of the broadcast program to be selected preferentially in the morning and in the afternoon for each different geographical situation. Has been. Of course, FIG.
In 2, it is also possible to select a broadcast program of the same program type in the morning and in the afternoon, as in the case of a suburban geographical situation.

In the case of the receiver according to the second embodiment, the program selection information memory 37 has both the program selection database shown in FIG. 10 and the program selection database shown in FIG. Based on settings from the user of the receiver according to the second embodiment, an automatic program selection process is performed in consideration of time and geographical conditions, or an automatic program selection process in accordance with only geographical conditions is performed. It is possible to switch whether to perform.

That is, each time the operator of the receiver according to the second embodiment presses the processing mode switching button key provided in the key operation section 31, the operator considers the time and the geographical situation. It is possible to switch between a first processing mode for performing the automatic program selection processing described above and a second processing mode for performing the automatic program selection processing considering only the geographical situation. In this case, so-called flag information indicating which processing mode is selected is stored and held in the nonvolatile memory of the system microcomputer 20.

When performing the automatic program selection process,
The system microcomputer 20 refers to the flag information stored and held in its own non-volatile memory and performs an automatic program selection process according to the selected processing mode.

FIG. 13 is a flowchart for explaining the automatic program selection processing executed in the system microcomputer 20 of the receiver of this example. Also in this example, the automatic program selection process is executed when the reception process of the DAB broadcast signal is started or when the channel selection of the DAB broadcast signal is changed.

When the processing shown in FIG. 13 is started, the system microcomputer 20 performs automatic program selection in consideration of time information by using flag information stored and held in its own nonvolatile memory. It is determined whether or not it has been performed (step S401).

If it is determined in step S401 that the time information is not taken into account, an automatic program selection process is performed according to only the geographical situation shown in FIG. 11 using the program selection database shown in FIG. 10 (step S401). S40
2). When it is determined in the determination processing of step S401 that time information is considered, an automatic program selection processing is performed using the program selection database of FIG. 12 and considering the time and the geographical situation shown in FIG. 14 ( Step S40
3).

FIG. 14 is a flowchart showing the operation of step S40 shown in FIG.
3 is a flowchart for explaining an automatic program selection process performed in Step 3 in consideration of time and a geographical situation. The processing in FIG. 13 is almost the same as the automatic program selection processing in which only the geographical situation shown in FIG. 11 is considered, but the reception time is detected and the time information shown in FIG. 12 is also considered. The difference is that a program selection database is used.

When the process shown in FIG. 14 is executed, the system microcomputer 20 transmits the selected and demodulated ensemble signal from the null symbol through the transmitting station identification information detecting unit 12 in the same manner as the process of FIG. 11 described above. , The transmitting station identification information of the transmitting station of the selected DAB broadcast signal is detected (step S501).
The position information (latitude and longitude information) of a plurality of transmitting stations included in the FIC of the tuned and demodulated ensemble signal is detected (step S502).

Next, the system microcomputer 20 obtains, from the detected information, the position information of the transmitting station of the reception-selected DAB broadcast signal specified by the transmitting station identification information, and transmits the information from the transmitting station. The position (reception position) of the receiver according to the second embodiment that receives the broadcast signal is specified (step S503).

Then, based on the specified reception position, the system microcomputer 20 stores the geographic information memory 3 shown in FIG.
With reference to the geographic information database of No. 6, information (terrain information) indicating the geographical situation around the receiving position is searched (step S504). Then, the search processing is performed until information indicating the geographical situation around the specified reception position is found by the search processing in step S304 (step S505).
If found, the system microcomputer 20 detects the current time from the clock circuit 32 (step S506).

Referring to the program selection database shown in FIG. 12 stored in the program selection information memory 37 based on the information indicating the geographical situation (topographic information) obtained as a result of the search and the detected current time. Then, program selection information of a broadcast program to be preferentially selected according to the geographical situation of the reception position and the reception time is searched (step S507).

Then, it is determined whether or not the program selection information of the broadcast program to be preferentially selected is found according to the geographical situation around the reception position searched in step S504 and the current time detected in step S506 ( In step S508), when it is determined that the program selection information has not been found, the processing from step S507 is repeated, and the search for the program selection information is continued.

When it is determined in step S508 that the program selection information has been found, the program selection information found as a result of the search is supplied to the selection decoding unit 6 (step S509), and the processing shown in FIG. 14 is ended. I do.

Thus, as described above with reference to FIG. 12, when the vicinity of the reception position is an urban area and the reception time is in the morning, a news program is automatically generated from the ensemble signal of the DAB which has been selected and demodulated. If the selected location is in an urban area around the reception location and the reception time is in the afternoon, the classic (music program) is automatically selected based on the geographical situation around the reception location and the reception time. Thus, it is possible to automatically select a broadcast program that has been preferentially selected.

Thus, when moving using an automobile equipped with the receiver according to the second embodiment, a broadcast program corresponding to the geographical situation around the reception position and the reception time is converted from the ensemble signal. You can select and listen automatically.

In the first and second embodiments, the automatic program selection processing is performed at the start of reception or at the time of changing the channel selection. The automatic program selection process is performed at predetermined timings, such as at predetermined time intervals, and the reception time, or the geographical situation around the receiving position, or the geographical situation around the receiving position and the change in the receiving time. Correspondingly, a broadcast program can be selected.

Further, for example, the automatic program selection process is executed at a predetermined timing, and when the previously detected transmitting station identification information is different from the newly detected transmitting station identification information, that is, the program is being received. When the transmitting station of the broadcast signal changes, the broadcast program can be selected according to the geographical condition around the receiving position or the geographical condition around the receiving position and the receiving time.

[Change of Program Selection Database]
In the receivers of the first and second embodiments described above,
The program selection information stored in the program selection information memories 35 and 37 can be changed by the user of the receiver according to the first and second embodiments.

That is, when the user of the receiver operates an operation key provided on the key operation section 31 of the receiver to request the change of the program selection information, the program selection information change processing is executed and the program selection information is changed. The program selection information stored in the memories 35 and 37 can be changed.

FIG. 15 shows the program selection information memories 35 and 37.
9 is a flowchart for explaining a process of changing the program selection information stored in the program. The process shown in FIG. 15 is executed by the system microcomputer 20 at each predetermined timing.

When the processing shown in FIG. 15 is executed, first, the system microcomputer 20 determines whether or not a request for changing program selection information has been input from the user via the key operation unit 31 (step S601). . Step S60
If it is determined in the determination process 1 that there is no request to change the program selection information, the process of changing the program selection information shown in FIG. 15 ends.

If it is determined in step S601 that there is a request to change the program selection information, the system microcomputer 20 determines whether there is a request for changing the program selection information in the program selection information memory 35 or the program selection database stored in the program selection information memory 37. The information is displayed on the LCD 34 through the LCD controller 33 (step S602).

The user of the receiver refers to the information of the program selection database displayed on the LCD 34 and operates the key operation unit 3.
Change information is input through one operation key group. The system microcomputer 20 receives the change information from the user,
Based on the received change information, the program selection information memory 3
5, or change the information in the program selection information memory 37 (step S603).

Thus, in the receiver according to the first embodiment, as shown in FIG. 4, the priority order and the priority-selected program corresponding to the priority order are stored in the program selection information memory 35. , The priority selection program corresponding to the priority order can be changed. Also, as shown in FIG. 6, when time information and information indicating a broadcast program to be selected preferentially (priority selected program) are stored in the program selection information memory, the time information may be changed. Alternatively, the correspondence between the time information and the priority selection information can be changed, for example, by changing the priority selection program corresponding to each time information.

As shown in FIG. 10, when the geographical situation and the preferentially selected program to be preferentially selected in the geographical situation are stored in the program selection information memory 37, the geographical situation Alternatively, the correspondence between the geographical situation and the priority-selected program can be changed by changing the priority-selected program.

Further, as shown in FIG. 12, when the program selection information memory 37 stores a geographical situation, information on time, and a preferentially selected program determined by the information on the geographical situation and time. Then, the correspondence between the information on the geographical situation and the time and the preferentially selected program can be changed by changing the information on the geographical situation and time or the preferentially selected program.

Thus, the broadcast program to be preferentially selected can be freely changed according to the preference of the user of the receiver, and the automatic selection of the broadcast program according to the demand of the user of the receiver is performed. be able to.

[Regarding Automatic Program Selection and Manual Program Selection] In the receivers of the first and second embodiments described above, only automatic program selection using program selection information stored in the program selection information memory is performed. Instead, it is also possible to receive input of program selection information from a user of the receiver and to select a program based on the input program selection information. That is, the receivers of the first and second embodiments described above are provided with an automatic program selection mode and a manual program selection mode, and these can be arbitrarily switched.

In this case, these modes are switched by
For example, each time the program selection mode switching button key of the key operation unit 31 is pressed, the mode can be switched between the automatic program selection mode and the manual program selection mode. The information on the program selection mode that can be changed by the user in this manner is stored and held in the nonvolatile memory of the system microcomputer 20.

When performing the program selection process, the system microcomputer 20 refers to the information of the program selection mode stored in its own non-volatile memory and selects a program in accordance with the selected program selection mode. Have been to do.

FIG. 16 is a flowchart for explaining a program selection process executed in the system microcomputer 20. This process is performed at the time of starting the reception process of the DAB broadcast signal or at the time of changing the channel selection of the DAB broadcast signal.

When the program selection process shown in FIG. 16 is executed, the system microcomputer 20 refers to the information of the program selection mode set in its own nonvolatile memory and selects the automatic program selection mode. It is determined whether or not it has been performed (step S701).

When it is determined in the determination processing of step S701 that the automatic program selection mode has been selected, the system microcomputer 20 performs the processing based on the program selection information stored in the program selection information memory as described above. An automatic program selection process for automatically selecting a broadcast program from the DAB ensemble signal is performed (step S702), and the process in FIG. 16 ends. Therefore, in this step S702, the automatic program selection processing described above with reference to FIG. 11, FIG. 13, or FIG. 14 is executed.

If it is determined in step S701 that the automatic program selection mode has not been selected, the system microcomputer 20 accepts input of program selection information from the user through the key operation unit 31. (Step S703), and supplies the received program selection information to the selective decoding unit 6 (Step S704). Thus, based on the program selection information input by the user, a broadcast program is extracted from the DAB ensemble signal,
This can be reproduced and provided.

As described above, the automatic program selection and the manual program selection can be selectively used. For example, when the vehicle equipped with the receivers of the first and second embodiments is stopped at a parking lot, In the case where the passenger or the passenger operates the receiver, manual program selection can be performed to select a desired broadcast program.

In a normal state, a broadcast program is selected in the automatic program selection mode. When a user manually inputs program selection information through the key operation unit 31, a program list is displayed. It is also possible to receive the input of the program selection information and select the program based on the input program selection information.

[Regarding accurate detection of reception position]
In the receiver according to the second embodiment described above, DAB
The approximate receiving position (reception range) is specified based on the transmitting station identification information included in the ensemble signal and the transmitting station, and the geographic information memory 36 is referred to using the specified receiving position. The system can detect the geographical situation of the receiving location.

However, as described above, in the case of DAB, broadcasting is performed by arranging a large number of transmitting stations for transmitting low-power broadcast signals in a network, and broadcasting is performed from a plurality of transmitting stations. Broadcast signals of the same frequency of DAB can be received.

FIG. 17 is a diagram for explaining the relationship between the DAB transmitting station and the receiving position (recipient position). FIG.
As shown in FIG. 7, the DAB is configured to perform the same broadcast with a small power from a plurality of transmitting stations arranged in a network, and the receiver includes a plurality of neighboring transmitting stations, in the case of FIG. 17, , Transmitting station ST1, transmitting station ST2, and transmitting station ST3.

In this case, even if the broadcast signal is the same DAB using the carrier wave of the same frequency, the reception timing of the DAB broadcast signal at the receiver is shifted due to the different transmitting station. D caused by this transmitting station being different
By detecting the phase shift of the AB broadcast signal, the receiving position can be obtained in more detail.

In the receiver according to the second embodiment, the synchronization processor 5 detects the phase shift of the received signal, and supplies the detected phase shift information to the system microcomputer 20. That is, the synchronization processor 5 has a function as a phase shift detecting unit.

Then, in the system microcomputer 20,
D transmitted from a plurality of transmitting stations from the synchronization processor 5
The receiving position is detected based on the phase shift of the AB broadcast signal and the position information of each transmitting station, for example, by using a three-point survey method. Thus, the system microcomputer 20
Has a receiving position detecting means for detecting a receiving position using the phase shift information from the synchronization processor 5 and a function of a manufacturer.

Thus, the receiving position can be detected more accurately. And based on a map etc., this range is a city area, this range is a suburb, and so on. Is stored in the geographic information memory 36, it is possible to more accurately detect the geographical state of the reception position according to the actual reception position. And according to the geographical situation of the actual receiving location,
A broadcast program that is preferentially selected according to a geographical situation can be automatically selected.

In the above-described first and second embodiments, the processing modes for performing the automatic program selection processing in consideration of the time information or performing the automatic program selection processing only in accordance with the geographical situation are described. Switching between the automatic program selection mode and the manual program selection mode has been described as being performed by operating a so-called direct key such as a processing mode switching button key or a program selection mode switching button key of the key operation unit 31. However, it is not limited to this.

For example, a menu display key is provided, and when the menu display key is depressed, a list of executable processes is displayed on the LCD 34, and a desired process is selected from the list. Various modes can be set, and the above-described process of changing the information in the program selection information memory can be performed, and the respective processes can be performed.

In the second embodiment, the geographic information memory 36 and the program selection information memory 37 are provided. However, the geographic information database stored in these memories and the program selection The database may be provided on the same memory. Also, the geographic information database and the program selection database may be combined into one. However, by separately creating the geographic information database and the program selection database, the amount of information can be reduced.

In the second embodiment, the program selection database according to the geographical situation shown in FIG. 10 and the program selection database according to the information about the geographical situation and time shown in FIG. Although the database has been described as being created in the program selection information memory 37,
It is not limited to this. For example, each database may be created in a different memory, and the memory to be accessed may be changed according to the automatic program selection process to be executed.

In the above-described embodiment, the program selection information memories 35 and 37 and the geographic information memory 36 have been described as being provided independently. However, for example, the non-volatile memory For example, a database may be created by storing information stored in the program selection information memories 35 and 37 and the geographic information memory 36 in an original memory or a memory used in other processing. Of course it is good.

In the above embodiment, the present invention is applied to a vehicle-mounted receiver. However, the present invention is not limited to a vehicle-mounted receiver, and a portable receiver or the like can be carried. The present invention can be applied to various receivers. Of course, the present invention can be applied to a so-called installation type receiver for home use.

In the above-described embodiment, D
Although the present invention has been described as being applied to an AB receiver, the present invention is not limited to this, and a broadcast signal in which a plurality of broadcast programs are multiplexed and identification information of the broadcast programs is added is broadcast. The present invention can be applied to various digital audio broadcast receivers.

[0165]

As described above, according to the digital audio broadcast receiver of the present invention, the digital audio broadcast signal is stored on the basis of the program selection information stored in the program selection information storage section. A broadcast program to be preferentially selected from among a plurality of broadcast programs multiplexed in the program can be automatically selected and listened to. This can prevent the listener from performing a complicated operation for selecting one broadcast program from a plurality of broadcast programs.

According to the digital audio broadcasting receiver of the present invention, a broadcast program that is preferentially selected is automatically selected according to the geographical situation of the receiving position. , You can listen.

According to the digital audio broadcast receiver of the present invention, for example, traffic information can be used during the work hours, pops in the afternoon, and return times during the home without any complicated program selection operation. Can automatically select and listen to a broadcast program that is preferentially selected according to the reception time, such as classical music.

According to the digital audio broadcasting receiver of the present invention, it is possible to automatically select and listen to a broadcast program based on the geographical situation and the current time. it can.

According to the digital audio broadcasting receiver of the present invention, the receiving position on the receiving side can be detected more accurately, and the digital audio broadcasting can be detected by using the geographical situation corresponding to the accurate receiving position. One broadcast program can be selected from many broadcast programs multiplexed on the audio broadcast signal.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an embodiment of a digital audio broadcast receiver according to the present invention.

[Fig. 2] Digital standard of European standard (Eureka 147)
FIG. 3 is a diagram for describing a frame structure of an ensemble signal of audio broadcasting (DAB).

FIG. 3 is a diagram illustrating a DAB ensemble signal in which audio data of a plurality of broadcast programs is multiplexed.

FIG. 4 is a diagram for explaining an example of program selection information stored in a program selection information memory shown in FIG.

FIG. 5 is a flowchart for explaining an automatic program selection process for automatically selecting one broadcast program from an ensemble signal of a selected DAB using program selection information in a program selection information memory 35;

6 is a diagram for explaining another example of the program selection information stored in the program selection information memory shown in FIG.

FIG. 7 is a flowchart for explaining an automatic program selection process of automatically selecting one broadcast program from an ensemble signal of a selected DAB using program selection information in a program selection information memory in consideration of a reception time. .

FIG. 8 is a block diagram for explaining another example of an embodiment of a digital audio broadcast receiver according to the present invention.

9 is a diagram for explaining the geographic information memory shown in FIG.

FIG. 10 is a diagram for explaining a program selection information memory shown in FIG. 8;

11 is a flowchart illustrating an automatic program selection process performed by the receiver illustrated in FIG. 8 to automatically select a broadcast program according to a geographical situation of a reception position.

FIG. 12 is a view for explaining a program selection database formed in a program selection information memory 37 for changing a broadcast program to be preferentially selected according to a geographical situation of a reception position and a reception time. FIG.

FIG. 13 is a flowchart illustrating an automatic program selection process performed in the receiver illustrated in FIG. 8;

FIG. 14 is a flowchart illustrating an automatic program selection process performed in the receiver illustrated in FIG. 8 in consideration of time and geographical conditions.

FIG. 15 is a flowchart for explaining a process of changing the program selection information stored in the program selection information memory shown in FIGS. 1 and 8;

FIG. 16 is a flowchart illustrating a program selection process executed in a receiver having an automatic program selection mode and a manual program selection mode.

FIG. 17: DAB transmitting station and receiving position (recipient position)
It is a figure for explaining the relation with.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Antenna, 2 ... Front end part, 3 ... Quadrature demodulator, 4 ... Differential demodulator, 5 ... Synchronous processor, 6 ... Selection decoding part, 7 ... Audio decoding part, 8 ... D / A conversion part,
9 amplifying circuit, 10 speaker, 11 information extraction unit, 2
0: system control microcomputer (system microcomputer), 31: key operation unit, 32: clock circuit, 33:
LCD controller, 34 LCD, 35 program selection information memory, 12 transmitting station identification information detection unit, 13 position information detection unit, 36 geographic information memory, 37 program selection information memory

Claims (8)

[Claims] Claims: 1. A plurality of broadcast programs are multiplexed,
A tuner section for receiving and selecting a digital audio broadcast signal to which identification information indicating the content of each of the plurality of broadcast programs is added; and among the plurality of broadcast programs multiplexed with the digital audio broadcast signal, A program selection information storage unit that stores and holds program selection information for instructing a broadcast program to be preferentially selected; and, from the digital audio broadcast signal received and selected by the tuner unit, the program selection information storage unit A digital audio broadcast receiver comprising: a program selection unit that extracts a broadcast program based on program selection information and the identification information in the digital audio broadcast signal. 2. The program selection information storage unit stores, as program selection information, a correspondence between a geographical situation and a broadcast program to be preferentially selected in the geographical situation. Position information detection means for detecting position information indicating the position of the added digital audio broadcast signal transmitting station; and detecting the reception position of the digital audio broadcast signal based on the detection output of the position information detection means. A receiving position detecting unit, a position, a geographic information storage unit in which a correspondence between the geographical situation is stored, and, based on the receiving position detected by the receiving position detecting unit, from the geographic information storing unit, A geographical situation detecting means for detecting the geographical situation corresponding to the receiving position, wherein the program selecting unit is detected by the geographical situation detecting means. Extracting a broadcast program from the digital audio broadcast signal based on the program selection information of the program selection information storage unit corresponding to the geographical situation and the identification information in the digital audio broadcast signal. The digital audio broadcast receiver according to claim 1. 3. The program selection information storage section stores, as program selection information, correspondence between time-related information and a broadcast program to be preferentially selected at a time corresponding to the time-related information. When receiving an audio broadcast signal, the program selection unit includes a current time detection unit that detects a current time, and the program selection unit stores the program selection in the program selection information storage unit corresponding to the current time detected by the current time detection unit. The digital audio broadcast receiver according to claim 1, wherein a broadcast program is extracted from the digital audio broadcast signal based on information and the identification information in the digital audio broadcast signal. 4. The program selection information storage unit stores, as program selection information, a correspondence between a combination of information on a geographical situation and time and a broadcast program to be selected by priority determined by the combination. Position information detecting means for detecting position information indicating the position of the transmitting station of the digital audio broadcast signal added to the digital audio broadcast signal; and the digital audio broadcast signal based on a detection output of the position information detecting means. Receiving position detecting means for detecting a receiving position of the geographical situation, a geographical information storage unit in which a correspondence between the position and the geographical condition is stored, and the geography based on the receiving position detected by the receiving position detecting means. A geographical situation detecting means for detecting information indicating the geographical situation corresponding to the reception position from an information storage unit; and detecting a current time. The program selection unit stores the program selection information determined by the geographical situation detected by the geographical situation detection means and the current time detected by the current time detection means. 2. The digital audio broadcast reception according to claim 1, wherein a broadcast program is extracted from the digital audio broadcast signal based on the program selection information of the section and the identification information in the digital audio broadcast signal. Machine. 5. The digital audio broadcast signal is transmitted from a plurality of transmitting stations using carrier waves of the same frequency, and is transmitted from the plurality of transmitting stations selected and received by the tuner section. A phase shift detecting unit configured to detect a phase shift of the plurality of digital audio broadcast signals, wherein the reception position detecting unit detects the reception based on a detection output of the position information detecting unit and a detection output of the phase shift detecting unit. The digital audio broadcast receiver according to claim 2, wherein a position is detected. 6. A change instruction input receiving means for receiving a change instruction input to the information in the program selection information storage section, and the program selection information storage section based on the change instruction input input through the change instruction input reception means. 2. A digital audio broadcast receiver according to claim 1, further comprising information changing means for changing the program selection information stored in the digital audio broadcast. 7. A change instruction input receiving means for receiving a change instruction input to information in the program selection information storage section, and the program selection information storage section based on the change instruction input input through the change instruction input reception means. 5. The digital audio broadcast receiver according to claim 2, further comprising information changing means for changing a correspondence or a combination of information stored in the digital audio broadcast. 8. A plurality of broadcast programs are multiplexed,
A receiver for a digital audio broadcast signal to which identification information indicating the content of each of the plurality of broadcast programs is added, wherein one broadcast from the plurality of broadcast programs multiplexed with the digital audio broadcast signal is provided. A tuner section having an automatic selection mode for automatically selecting a program, and a manual mode for selecting according to an instruction from an operator, and receiving and selecting a digital audio broadcast signal in which a plurality of broadcast programs are multiplexed; A program selection unit that extracts one broadcast program from the digital audio broadcast signal received and tuned by the tuner unit; and a priority is given to the plurality of broadcast programs multiplexed with the digital audio broadcast signal. A program selection information storage unit for storing and holding program selection information for designating a broadcast program to be selected, and selecting a broadcast program from an operator Selection instruction information receiving means for receiving an input of selection instruction information for performing selection, selection information receiving means for receiving an input of mode selection information from an operator, based on the selection information from the selection information receiving means,
A mode switching unit that switches between the automatic selection mode and the manual mode. When the mode switching unit is switched to the automatic selection mode, the program selection unit receives and selects a channel by the tuner unit. Extracting a broadcast program from the digital audio broadcast signal based on the program selection information in the program selection information storage unit and the identification information in the digital audio broadcast signal; When the program selection section is switched to the selection instruction information, the tuner section receives and selects the program based on the selection instruction information supplied from the selection instruction information receiving section and the identification information in the digital audio broadcast signal. A broadcast program is extracted from the broadcasted digital audio broadcast signal. Receiver for digital audio broadcasting, characterized by.