JPH10290171A - Dab reception system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save labor for operation due to a user at the time to start the desired program by improviding a digital audio broadcasting(DAB) reception system and proceeding automatic control. SOLUTION: Through the button operation of user interface 13, the user watches a program table extracted from a memory 12, inputs and reserves the title of desired program to reserve and its start time or the like. Then, a CPU 11 extracts current time from data received by DAB and at the reserved start time, the program or medium under outputting at present is recorded in the memory 12. After peripheral equipment is turned on, the CPU 11 changes over a switcher 21 to the DAB side, switches the program under reception at present to the reserved program and starts the reception and output of DAB. In this case, when recording is set in place of the output of DAB program by reservation setting operation, recording is performed by switching to a cassette recorder 24 through a changeover switch 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a DAB receiving system (DAB: Digital Audio Broadcasting, Digital Audi)
o Broadcasting).

[0002]

2. Description of the Related Art Recently, DAB systems using digital signals instead of analog signal broadcasting have been put to practical use.

[0003]

Conventionally, in a DAB receiving system, when a start time of a desired program comes, a user manually operates to receive the desired program.
In DAB, if the DAB wave deteriorates during reception, good output cannot be obtained. In this case, too, the user has manually switched to another medium.

SUMMARY OF THE INVENTION An object of the present invention is to improve the DAB receiving system to reduce the number of user operations by promoting automatic control by the DAB receiving system.

[0005]

According to the first aspect of the present invention, there is provided a DAB receiving system, comprising: input means for inputting reservation contents of a program to be reserved; There are provided means for recording the contents of the reservation input from the input means in the memory, and means for receiving and outputting the program reserved by the DAB receiver at the start time of the reserved program. According to the first aspect, a program can be reserved in the DAB receiving system, and the program is automatically output at the start time of the reserved program.

In a second aspect of the present invention, a DAB receiving system includes means for acquiring a DAB wave receiving state,
The output of the DAB receiver is connected to the output of other media,
A switch for switching and outputting between the output of the DAB receiver and the output of the other medium; and a DAB reception unit for the DAB reception when the reception status acquisition unit determines that the reception status of the DAB wave is degraded. Means for switching from the output of the device to the output of another medium.

According to the second aspect, when the reception condition of the DAB wave deteriorates, the output is automatically switched to another medium, so that the user does not have to switch the medium.

[0008]

FIG. 1 is a block diagram of a DA to which the present invention is applied.
It is a circuit diagram of a B receiving system. In the figure, 1 is DA
A B receiver, an RF receiver 3 connected to the antenna 2,
It has an FFT demodulation unit 4, an error correction decoding unit 5, an audio decoding unit 6, and a D / A converter 7, and a D / A converter 7
Are connected to speakers 9 and 10 via an amplifier 8. The DAB receiver 1 further includes an RF receiver 3, an FFT
Demodulation unit 4, error correction decoding unit 5, audio decoding unit 6
The CPU 11 is connected to the memory 1
2 and a user interface 13. The above-described circuit configuration of the DAB receiver 1 is well known, and a detailed description thereof will be omitted.

In this embodiment, a first switch 21 and a second switch 22 are provided between the D / A converter 7 and the amplifier 8.
Is inserted. The first switch 21 switches between the output of the D / A converter 7 of the DAB receiver 1 and the CD player 23, DAT 26, and cassette recorder 24 of other media, and outputs them to the amplifier 8 side. The second switch 22 is connected to the DA
The output of the D / A converter 7 of the B receiver 1 is switched to either the amplifier 8 or the cassette recorder 24 and output.

Further, the audio decoding unit 6 and the D / A
A first switch 25 is connected between the converters 7, and a second switch 27 is connected between the error correction decoding unit 5 and the audio decoding unit 6. The outputs of the first switch 25 and the second switch 27 and the information output of the CPU 11 are DA outputs.
It is input to T26. CD player 23, DAT
26, the activation instruction for the cassette recorder 24 is
11 is output.

Next, the operation of the DAB receiving system shown in FIG. 1 will be described. FIG. 2 is a flowchart showing an operation of accumulating data necessary to enable a reservation operation, and FIG.
FIG. 4 is a flowchart showing an operation of executing a reservation, and FIG.
5 is a flowchart showing the operation of the DAB receiving system after setting a reservation. The operation shown in the flowchart of FIG. 2 is executed as part of the initial setting operation in the CPU 11 when the main switch (not shown in FIG. 1) of the DAB receiving system is turned on. DAB in step S11
Is received, and in step S12, program information is extracted from the data. The program information includes the name of the program to be broadcasted in the future, the start time, and the like, which are necessary for the reservation.
This program information is stored in the “Program” in the DAB data.
Alternatively, data using a pair of the ID of each program, the start time, and the end time may be transmitted. In step S12, from the program information,
The information required for the reservation, such as the program ID, start time, and end time, is extracted. In step S13, the extracted information is stored in the memory 12.

FIG. 3 shows the execution operation of the reservation operation. Note that the flow used in this flow and the following description is a CP
This is included in the main loop of U11. The user operates a predetermined button such as a reservation button on the user interface 13 when starting a reservation. When the reservation start operation is performed, the process proceeds from step S21 to step S22, where the program guide is taken out from the memory 11 and displayed on the user interface 13.
The user looks at this display and inputs the name of the program to be reserved, the start time, and the like from the user interface 13 (step S23).

In step S23, the user inputs items other than the program name and start time described above.
Various items can be set. For example, it is possible to set whether to set the DAB receiving system in a standby state after setting an end time and setting a reservation. It is also possible to set whether to output the reserved program directly from the speakers 9 and 10 when the start time comes, or to notify the user of the arrival of the start time by voice, beep sound, screen display, or the like. . Further, when the start time comes, instead of outputting the DAB program, the cassette recorder 24 or the DAT 26
Can be set to record the program.

These set data are stored in the memory 11
(Step S24) The program name is recorded after being converted into a program ID. Then, in step S23, it is checked whether or not the setting for the standby state is set. If not, the display or the like is returned to the state before the start of the reservation. If the setting is made, the DAB receiving system is set. 1 is set in a standby state (step S26).

In the standby state (sleep mode) in this embodiment, only the RF receiver 3, the FFT demodulator 4, and the error correction decoder 5 are turned on, and the CPU 11 receives and analyzes only the FIC. Time information for starting a reserved program is obtained. As another example of the standby state, only the CPU 11 may be activated and time information may be obtained from an external clock (for example, an automobile clock). Then, when the reservation time comes, the CPU 11 turns on the power of the peripheral device to cancel the standby state. Thus, by putting the system in the standby state after the reservation input, it is possible to suppress power consumption.

FIG. 4 is a diagram showing the D reserved after the reservation setting shown in FIG.
It shows the operation leading to the output of AB. Step S3
At 1, it is checked whether the inhibit switch is on. This prohibition switch is attached to the user interface 13 of FIG. This prohibition switch is turned on when not switching to DAB even when the reserved time comes, for example, when it is not desired to interrupt the CD currently being listened to. If it is determined in step S31 that the prohibition switch is on, the process shown in FIG. 4 is skipped.

If the prohibition switch is off in step S31, the reserved time is retrieved from the memory 12 in step S32, and the current time is retrieved from the data received by the DAB in step S33. Then, step S34
Then, it is determined whether or not the current time has reached the reservation start time. In step S35, it is determined whether or not the current time has reached the reservation end time.

When the current time reaches the reservation start time, the process proceeds from step S34 to step S36, and the program or medium currently output (before the start time) is recorded in the memory 12. When a DAB program is currently output, the ID name of the program is recorded. When the program is output from another medium, for example, a CD player 22, the fact that the CD player 22 is a medium is recorded. If none is currently output, no data is recorded in the memory 12. Then, in step S37, the reserved DAB is started. At the start of the DAB, the CPU 11 turns on the peripheral device, then switches the switch 21 to the DAB side, and switches from the program currently being received (being decoded) to the reserved program,
DAB reception and output are started.

The reception and output of the DAB can be modified as follows. In the above-described reservation setting operation (step S23) in FIG.
If voice guidance, beep sound, or screen display is set instead of starting B, automatic switching to the reserved program is stopped. Then, the data stored in the memory 12 is taken out, converted to voice, and output to the speakers 9 and 10.
Outputs a voice or beep sound. Alternatively, the guidance is displayed on the display screen of the user interface 13 in the form of characters. When such a display is made, the user manually receives and outputs the reserved program as necessary. Note that guidance by voice or beep sound has an advantage that the driver can be notified even in a situation where the driver cannot see the display.

Further, in the above-described reservation setting operation (step S23) in FIG. 3, when the recording of the program is set instead of the output of the DAB program, the second switch 22 is set to the cassette recorder. 24, and the cassette recorder 24 is activated. Thus, the output of the DAB is recorded on the cassette recorder 24 as an analog signal.

In the above-mentioned reservation setting operation (step S23) in FIG. 3, the program recording method is as follows.
If digital signal recording is specified, the first
Is turned on, DAT is activated, and the output of the audio decoding unit 6
26. In this case, D
AB program is output from the speakers 9 and 10,
By configuring the switch 25 in the same manner as the second switch 22, the output of the DAB program can be stopped and recording can be performed. Conversely, the second switch 22 is connected to the first
With the configuration similar to that of the switch 25, the DAB program can be output from the speakers 9 and 10 while the analog signal is recorded in the cassette recorder 24.

It should be noted that recording by the cassette recorder 24 can be performed at low cost, and recording by the DAT 26 has the advantage that recording of good sound quality can be performed because it is not affected by noise. When recording a digital signal by the DAT 26, the DAT 26 not only records the program contents but also outputs a PAD (Program Associated Data) output from the audio decoding unit 6.
a) can be recorded at the same time. This P
By recording with the AD added, the identity of the recorded audio data can be checked later.

Further, by turning on the second switch 27 connected between the error correction decoding section 5 and the audio decoding section 6 and activating the DAT 26, the DAT 26 records the encoded audio encoded data. You can also In this case, the MPE
Since the G data is recorded, there is an advantage that the recording capacity can be reduced.

When recording a digital signal, program information (time, date, etc.) can be recorded from the CPU 11 at the beginning of the program. As a result, the information at the time of recording can be retrieved later, and this can be used as an index. As described above, D
If the reservation end time is set after the output or recording of the AB program is started, when the current time reaches the reservation end time, the process proceeds from step S35 to step S38, in which the DAB receiver is turned off and the DAB program is turned off. Terminates the output of When program recording is set,
These recordings are stopped.

Next, in step S39, the program or media output before the start of the reserved program is stored in the memory 12
Is recorded. If it has been recorded, in step S40, it is switched to the program ID recorded in the memory 12, or the switch 21 of FIG. 1 is switched to another medium to output or output the original DAB program. Output other media. If it is not recorded in the memory 12, the apparatus is stopped. This eliminates the need to manually switch to another program or another medium after the end of the reserved program.

Steps S39 and S40 are omitted, and
After the reservation is completed, the apparatus can be stopped in all cases. FIG. 5 is a circuit diagram of a second example of the DAB receiving system to which the present invention has been applied. 5, components having the same functions as those in FIG. 1 are denoted by the same reference numerals, and redundant description will be omitted.

A reception status acquisition unit 31 for detecting the reception status of the DAB wave is provided, and its output is input to the CPU 11. The CPU 11 controls the switching of the first switch 21 and the start / stop of the CD player 23 as another medium according to the output of the reception status acquisition unit 31. A prohibition switch 32 is inserted on the output side of the CPU 11.

FIGS. 6, 7 and 8 show the reception status acquisition unit 31.
An example of the configuration will be described. The reception status acquisition unit 31 shown in FIG.
The S level (signal level) is extracted from the F receiving unit 3 and input to one input terminal of the comparator 34 through the low-pass filter 33. A voltage 36 serving as a reference value is input to another input terminal of the comparator 34. According to this example, D
When the AB wave deteriorates and the signal level drops below a certain value, a signal is output from the comparator 34.

The reception status acquisition unit 31 shown in FIG. 7 extracts an error flag from the error correction decoding unit 5 and
To one input terminal of the comparator 34. According to this example, when the DAB wave deteriorates and the error continues for a predetermined time or more, a signal is output from the comparator 34. The reception status acquisition unit 31 shown in FIG. The reception status acquisition unit 31 performs a CRC check on the audio frame of the audio decoding unit 5, and
When the AB wave has deteriorated and the number of errors per unit time exceeds a threshold, it is determined that the DAB wave has deteriorated.

When a signal is output from the reception status acquisition unit 31 in FIGS. 6 to 8, the CPU 11 in FIG. 5 determines that the DAB wave has deteriorated, and switches the first switch 21 to the CD player 24 side. Then, the CD player 24 is activated. Therefore, when good reception becomes impossible due to deterioration of the DAB wave, the switching to the CD player 24 is automatically performed.
The user can save the trouble of switching to another medium. Note that other media other than the CD player 24 can be used.

In this embodiment, if it is not desired to switch to another medium even if the DAB reception condition is deteriorated, the prohibition switch 32 is turned on to switch the first switch 21 and switch the CD. DAB can be continuously output by prohibiting activation of the player 24. By providing the prohibition switch 32 in this manner, the options of the user can be expanded.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a DAB receiving system according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing a reservation data accumulation operation of the system of FIG. 1;

FIG. 3 is a flowchart showing a reservation setting operation of the system of FIG. 1;

FIG. 4 is a flowchart showing a reservation execution operation of the system of FIG. 1;

FIG. 5 is a block diagram showing a DAB receiving system according to a second embodiment of the present invention.

FIG. 6 is a block diagram showing a first configuration example of a reception status acquisition unit used in FIG. 5;

FIG. 7 is a block diagram showing a second configuration example of the reception status acquisition unit used in FIG. 5;

FIG. 8 is a block diagram showing a third configuration example of the reception status acquisition unit used in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... DAB reception system 3 ... RF reception part 4 ... FFT demodulation part 5 ... Error correction decoding part 6 ... Audio decoding part 7 ... D / A conversion part 8 ... Amplifier 9,10 ... Speaker 11 ... CPU 12 ... Memory 13 ... User Interfaces 21, 22 Switcher 23 CD player 24 Cassette recorder 25, 27 Switch 26 DAT 31 Reception status acquisition unit 33 Low-pass filter 34 Comparator 35 Integration circuit

Claims (15)

[Claims] 1. An input means for inputting a reservation content of a program to be reserved, a means for recording the reservation content inputted from the input means in a memory, and a DAB reception when a start time of the reserved program comes. Means for receiving and outputting a program reserved by the device. 2. The DAB receiving system according to claim 1, further comprising means for setting the receiving system in a standby state until the reservation time comes after the reservation content is inputted by said input means. 3. A program for recording an original program that was heard immediately before the start of the reserved program, wherein the program receiving and outputting the program includes:
3. The DAB receiving system according to claim 1, wherein the DAB receiving system switches and outputs the original program recorded in the recording unit. 4. An output terminal of the DAB receiver is connected to an output of another medium, and a switch is provided for switching and outputting between the output of the DAB program and the output of the other medium. The DAB receiving system according to claim 1, wherein the means for receiving the DAB switches the switch to the output side of the DAB receiver when the start time of the reserved program comes. 5. A means for recording the original medium that was heard immediately before the start of the reserved program, and a means for switching the switch to the original medium recorded on the recording means after the end of the reserved program. The DAB receiving system according to claim 4, further comprising: 6. The DAB receiving apparatus according to claim 1, further comprising means for prohibiting an operation of a means for receiving and outputting the program at a start time of the reserved program. system. 7. The apparatus according to claim 1, further comprising means for displaying on the display that the start time of the reserved program has been reached, in place of the means for receiving and outputting the program at the start time of the reserved program. The DAB receiving system according to claim 1. 8. The apparatus according to claim 1, further comprising means for displaying the start time of the reserved program by voice instead of the means for receiving and outputting the program at the start time of the reserved program.
7. The DAB receiving system according to any one of 6. 9. The recording apparatus according to claim 1, further comprising means for recording an analog signal output from a means for receiving and outputting the program in a recording device at a start time of the reserved program.
The DAB receiving system according to the paragraph. 10. The recording apparatus according to claim 1, further comprising means for recording a digital signal of program contents in a recording device at a start time of the reserved program by a means for receiving and outputting the program. DAB receiving system. 11. The DA according to claim 1, further comprising means for recording encoded audio data in a recording device at a start time of the reserved program.
B receiving system. 12. The DAB receiving system according to claim 11, wherein said recording means adds a PAD to a digital signal of the program. 13. The D according to claim 10, wherein said recording means simultaneously records program information of a program to be recorded.
AB receiving system. 14. A means for acquiring a reception status of a DAB wave, an output of a DAB receiver and an output of another medium are connected,
A switch for switching and outputting between the output of the DAB receiver and the output of the other medium; and a DAB reception unit for the DAB reception when the reception status acquisition unit determines that the reception status of the DAB wave is degraded. Means for switching from the output of the device to the output of another medium. 15. The DAB receiving system according to claim 13, further comprising means for prohibiting an operation of said switching means.