JPH10209985A - Broadcasting receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely hear the interruption information sent from a DAB(digital audio broadcast) and an RDS(radio data system) by processing the interruption information received by a DAB/RDS sharing radio set that is mounted on a car in preference to other information. SOLUTION: A user previously selects a combination of broadcasting systems which allow the interruption. A microcomputer 46 controls the connection via a switch 48 between a volume 50 and a CD player 42 and also between an RDS tuner 44 and a DAB tuner 10. When the interruption information is produced from an RDS or a DAB, the microcomputer decides an interruption source and then decides a mode where the interruption is allowed to execute an interruption processing routine if approved. The connected player 42 or a tuner is cut and the tuner where the interruption information is produced is connected. Then the interruption information on the relevant broadcasting is outputted through a speaker 54.

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a plurality of transmission methods, for example, DA
B (Digital AudioBroadcasti)
ng: digital audio broadcasting) and RDS (Radi
The present invention relates to a broadcast receiver capable of receiving a transmission signal of an oData System (OData System), and more particularly, to a broadcast receiver having improved processing of interrupt information.

[0002]

2. Description of the Related Art DAB has attracted attention as a radio broadcast format capable of coping with deterioration of sound quality due to interference due to multi-localization of FM broadcasting and difficulty in receiving good quality on a mobile body. DA
B has been developed by EUREKA (European Advanced Technology Development Plan), and its specifications have already been defined. As a modulation method, π / 4 shift DQPSK-OFDM is used.
(Differential Quadrature
Phase Shift Keying-Orthog
onal Frequency DivisionMu
ltiplex: orthogonal frequency division multiplexing), which is characterized by being less susceptible to fading and multipath.
Using the PEG layer II, a large number of stereo broadcasts and data broadcasts are enabled with a transmission bandwidth of 1.5 MHz.

On the other hand, as an existing radio broadcast format, RDS
Exist, AM and F as in current Japan
RD as well as a radio that can receive both M broadcast systems
Radios capable of receiving both S and DBS broadcast formats have been developed. The DAB and RDS broadcast radio waves include data relating to interrupt information together with audio data. When interrupt information is received, the interrupt information is output as appropriate.

[0004]

A radio receiving both DAB and RDS, like an AM and FM radio, transmits a received radio wave to a DA which emits sound from a speaker or the like.
The signal is switched to one of B and RDS radio waves, and the interrupt information to be output is limited to the broadcast format in which the sound is output from the speaker at that time. Also CD
While playing (compact disc), the speaker etc. are C
D output, and even if there is interrupt information,
It is difficult for the user to know the interrupt information.

[0005] An object of the present invention is to provide a broadcast receiver capable of coping with such a problem.

A broadcast receiver (4) of the present invention is provided.
0) can receive transmission signals transmitted by different transmission methods, and each transmission method includes interrupt information data together with audio data. Then, during the audio output of the program of the predetermined transmission method, the broadcast receiver (40) receives the transmission signal of the other transmission method together with the transmission signal of the transmission method, and receives the transmission signal of the transmission method and the other transmission method. The interrupt information included in the information can be appropriately output as audio.

[0006] The transmission format of the different transmission systems is not limited to radio waves, but includes other transmission formats such as electric signals by cables and optical signals by optical fibers.

The audio output includes not only speakers but also headphones and earphones.

In this way, the user is not limited to the interrupt information from the transmission signal of the transmission method corresponding to the program being listened at that time, and can also hear the interruption information of the transmission signal of another transmission method which is not heard. become.

According to another broadcast receiver (40) of the present invention,
Transmission signals transmitted by different transmission methods can be received, and each transmission method includes interrupt information data together with audio data. Then, during operation of the audio player, the broadcast receiver (40) receives transmission signals of the respective transmission schemes, and appropriately sets audio output of interrupt information included in the transmission signals of the transmission schemes.

[0010] The audio player includes not only a CD player but also all audio players capable of reproducing recorded audio, such as an MD player and a tape player. The operation of the audio player includes not only the playback operation, but also music selection, tape rewinding, and the like.

In this manner, the user can avoid hearing interruption information even during operation of the audio player, such as during playback of the audio player.

Another broadcast receiver (40) of the present invention further has the following (a) and (b). (A) Selection means (30) for selecting one or a plurality of transmission schemes permitting output of interruption information (b) Audio output of transmission signal interruption information relating to the transmission scheme selected by selection means (30) Audio output means (46)

[0013] The user can select one or a plurality of transmission methods for outputting interrupt information as audio from a plurality of transmission methods, and listen to only desired interrupt information.

[0014] In another broadcast receiver (40) of the present invention, the audio output means (46) is provided for the predetermined type of interrupt information regardless of the selection by the selection means (30).
Output audio.

There are a plurality of types of interrupt information, such as traffic information and alarms for transmitting emergency information such as occurrence of disasters. For example, alarms have urgency and importance. Regardless of the user's selection, audio output can be made to notify the user.

Another broadcast receiver (40) according to the present invention further includes an interruption mode display means (32) for displaying the transmission mode selected by the selection means (30) as an interruption mode.

Thus, the user can know which interrupt mode is currently in operation.

Another broadcast receiver (40) of the present invention further comprises interrupt display means (32) for displaying that the interruption is being performed while the audio output means (46) outputs the interrupt information as audio. Have.

The interrupt mode display means (32) and the interrupt display means (32) may be the same display or separate displays. As an example of the interrupt display, there is also a display such as "outputting the interrupt information from the RDS", which indicates the transmission method from which the interrupt is issued, other than "interrupting".

Thus, the user can know that the sound flowing from the speaker or the like at that time is caused by the interruption.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. Figure 4 shows the DAB tuner 10
1 is a system configuration diagram of FIG. DAB tuner 10
2, and DAB control microcomputer 2 separate from main body 12
Equipped with 6 mag. In the main body 12, the DAB system microcomputer 14 has a memory 16 and a plurality of ensembles (each ensemble is transmitted by radio broadcast radio waves modulated by DQPSK-OFDM, and one ensemble has a bandwidth of about 1. 5 MHz, which usually includes six broadcast programs.)
The designated information is sent to the RF block 18. RF block 18
The RF (Radio Frequency) of the designated ensemble is extracted from the DAB system microcomputer 14 and sent to the demodulation block 20. In demodulation block 20, RF
The RF signal from the block 18 is demodulated, and the channel decoding block 22 decodes the demodulated signal from the demodulation block 20.
Thus, the DAB system microcomputer 14 sends the RF block
A full digital signal of one ensemble designated at 18 is obtained in the channel decoding block 22. Among the digital signals decoded in the channel decoding block 22, audio data is sent from the channel decoding block 22 to the audio decoding block 24, and FIG data such as program types other than the audio data (FIG is described later).
Is the DAB system microcomputer from the channel decoding block 22
Sent to 14. The audio decoding block 24 includes, among audio data input from the channel decoding block 22,
The sub-channel audio data specified by the DAB system microcomputer 14 is decoded and sent to the left and right speakers 54 (FIG. 5). The DAB control microcomputer 26 has a memory
28, and exchanges data with the DAB system microcomputer 14 of the main body 12. DAB control microcomputer 26
An instruction from the user is input through the key 30 and outputs predetermined data to the display 32 to display information and notify the user.

FIG. 5 is a block diagram of a DAB / RDS shared radio 40 mounted on a vehicle. Outputs of the CD player 42, the RDS tuner 44, and the DAB tuner 10 are sent to a switch 48. The microcomputer 46 is a DAB system microcomputer shown in FIG.
14 and DAB control microcomputer 26, switch
The connection between the volume 50 and the CD player 42, the RDS tuner 44, and the DAB tuner 10 is controlled via the
Player 42, RDS tuner 44, and DAB tuner 10
The selected one of the outputs is sent to the volume 50. The volume 50 adjusts the volume of the sound output from the speaker 54, and the output of the volume 50 is amplified by the amplifier 52 and then output from the speaker 54. The user operates the key 30 to make a predetermined input to the microcomputer 46, and the microcomputer 46 displays the data on the display 32.

In FIGS. 6 to 11, communication protocols of various elements of DAB such as a transmission frame will be described as appropriate. For details, see the European Telecommunications Standards Association (European Telecommunications).
nations Standards Insti
European Telecommunications Standard (European Telecommunications)
ionics Standard).

FIG. 6 shows the structure of a DAB transmission frame. Transmission frame (Transmission fra
me) is the synchronization channel, FIC (Fast)
Information Channel) and M
It has SC (Main Service Channel). The FIC further includes a plurality of FIBs (Fast
Information Block), MS
C is a plurality of CIFs (Common Inter
left Frame). The DAB has specifications from mode 1 to mode 3, and the transmission frame time (duration) and the number of FIBs and CIFs in one transmission frame are different for each mode. For example, in mode 1, the time of one transmission frame is 9
The number of FIBs and CIFs in one transmission frame of 6 ms is 12 and 4, respectively.

FIG. 7 is a view showing an example of the DAB service structure. Ensemble label is DAB Ensemble 1 (DA
B ENSEMBLE ONE) is an ensemble (Ensemble) whose service label is alpha1.
Radio (ALPHA1 RADIO), Beta Radio (BETA RADIO), Alpha 2 Radio (ALP)
HA2 RADIO) and other services (Servi
ce). The user hears the selected service from the DAB radio 10.

The alpha 1 radio has one main service component and two sub service components. The main service component is audio, and the secondary service component is a traffic message channel: TMC (Traf).
fic Message Channel and service information: SI (Service Information)
It is. The audio component and the SI are transmitted on separate subchannels (SubCh) in the MSC, and the TMC is transmitted in a FIDC (Fast Information Da) in the FIC.
ta Channel).

Beta radio has two service components.
Audio and secondary audio (secondary a
audio component), both of which are MS
On the C subchannel.

The alpha 2 radio has the same TMC and SI as the alpha 1 radio, and the audio may be the same as the alpha 1 radio depending on the switching.

FIG. 8 is a structural diagram of the FIB. FIB
A total of 256 bits, the first 30 bytes of FI
B data area (FIB data field) and rear 16-bit CRC (Cyclic Redunda)
ncy Check word). The FIB data area further includes a plurality of FIG (Fas
t Information Group), one end marker (Endmarker), and one padding (filling the remaining bits with 0s to fit the FIB data area to bytes). The part of FIG is a useful data area (useful data view).
ld). Each FIG is, in order from the beginning, a FIG type, a Length (length: represents a bit length of a subsequent FIG data area), and a FIG data area (FIG.
data field). Fig type and Le
ngth forms a FIG header.

FIG. 9 is a structural diagram of the FIG data area of FIG. 8 in which the FIG type is 0 (000 in 3-bit binary notation). The FIG data area further stores C / N
(Current / Next), OE (Other E)
nsemble), P / D (Programme / Da
ta), Extension, Type 0 area (Type
0 field). Extension is 1 to 4
And 7, when C / N = 0, it means the current multiplex structure, and when C / N = 1, it means the next multiplex structure. Also, C / N =
When it is 1, it means that the type 0 area is related to the following arrangement. Extension is 6, 9, 11, 1
In the case of 8, 21, 22, 23, 24, 25, 27, and 30, C / N indicates the version number of the type 0 area.
OE is Extension = 12, 16, 17, 21,
24, 30 are used, and OE = 0 indicates this type 0
The information of the area means that it is related to this ensemble, and OE = 1 means that it is related to another ensemble. P / D = 1 indicates SId of type 0 area
Is the 16-bit Sid used for program services
, And P / D = 0 indicates that S in the type 0 area
If Id is the 32 bit S indicator used for data service
Id. This P / D is Extnsi
It is used when on is 2, 9, 23, 24, and when it is not used, SId has a 16-bit format.

FIG. 10 Of the FIG. 9 in FIG.
on is 18 (hereinafter each FIG is referred to as a FIG type and an Exte
and nsion as shown in FIG. FIG. 2 is a structural diagram of a type 0 area. The type 0 area further:
Multiple announcement support (Announce)
ment support. Announcement = interrupt. ) Area. Each announcement support is SId
(Service Identifier), Asu_
flags (Asu = Announcement su
report_port) and Cluster_Id data. SId indicates which service it is. A
Each bit of su_flags corresponds to the type of interrupt information (for example, in the interrupt information, the alarm corresponds to bit 0), and Cluster_Id indicates the cluster to which this SId belongs. SIds having the same Cluster_Id share interrupt information.

FIG. 11 shows the Extends of FIG.
It is a structural diagram of the type 0 area | region where ion is 19 (FIG0 / 19). The type 0 area further includes a plurality of announcement switchings (Announcements).
switching). Each announcement switching is performed by Asw (Announcement sw
(itching) _flags, Cluster_I
d, and SubChId. Asw_flags
Have the same meaning as the bits of Asu_flags of FIG0 / 18, and correspond to the type of interrupt information. Cluster_Id indicates a cluster, Su
bChId indicates the sub-channel carrying the interrupt information for this cluster. Receipt of FIg0 / 19 means that an announcement (= interrupt) has occurred. From FIG0 / 18 and FIG0 / 19,
An interrupt is generated, and it is possible to detect which sub-channel the content of the interrupt information is in.

FIG. 1 is a flowchart of an interrupt processing assignment routine. In S60, it is determined whether or not an interrupt request has been made. If YES, the process proceeds to S62, and if NO, S60 is executed again. In S62, it is determined whether or not the interrupt is alarm (ALARM) information.
If it is S, the process proceeds to S86 to perform an ALARM interrupt process. If NO, the process proceeds to S64. In S64, it is determined whether or not the interrupt function is ON, that is, whether or not the user has accepted that the interrupt information is to be interrupted when there is. If YES, the process proceeds to S66. If NO, the process returns to S60. In S66, it is determined whether or not the interrupt mode is the AUTO mode, that is, whether or not any of DAB and RDS allows an interrupt. If YES, the process proceeds to S72, and if NO, the process proceeds to S68. . In S68, the interrupt mode is DAB
It is determined whether or not _0NLY is set, that is, whether or not only interruption from DAB is permitted. If YES, the process proceeds to S76, and if NO, the process proceeds to S70. S
At 70, it is determined whether or not the interrupt mode is set to RDS_0NLY, that is, whether or not only the interrupt from the RDS is permitted.
If O, the routine ends. In S72, the CD
Is determined (YES), the process proceeds to S74, and if NO, the process proceeds to S78. S
In 74, the band received before playing the CD is DAB
Is RDS, if it is DAB, proceed to S76,
If it is RDS, go to S80. In S76, it is determined whether or not the request is a DAB interrupt request. If YES, the process proceeds to S84, and if NO, the process returns to S60. In S78, it is determined whether the current reception band is DAB or RDS. If it is DAB, the process proceeds to S76, and if it is RDS, the process proceeds to S80.
In S80, it is determined whether or not the request is an RDS interrupt request. If YES, the process proceeds to S82, and if NO, the process proceeds to S82.
Return to 60. In S82, an RDS interrupt process is performed.
In S84, the DAB interrupt process is performed.

In the flowchart of FIG.
In the determination as to whether the mode is the TO mode or not, if YES, S
It goes to 72, but as another method,
If yes, then whether the interrupt is for RDS
It is determined whether it is of AB type, and if it is an RDS interrupt, the process proceeds to S82, where an RDS interrupt process is performed and DA
If the interrupt is a B interrupt, the process may proceed to S82 and set to execute a DAB interrupt process.

FIG. 2 is a flowchart of the interrupt mode switching routine. In S90, it is determined whether or not a switching mode for switching the interrupt mode is set. In S92, it is determined whether or not a feed key (FIG. 3; in FIG. 3, two feed keys are provided on the left and right sides, the feed key in S92 indicates that the right feed key has been operated). Is determined, if YES, proceed to S94, if NO,
The routine ends. In S94, it is determined whether or not the state before the key was turned on was the AUTO mode.
If so, the process proceeds to S98, and the mode is switched to the DAB_ONLY mode. If NO, the process proceeds to S96. In S96, it is determined whether or not the state before the key was turned on was the DAB_ONLY mode. If YES, the process proceeds to S100.
Switch to RDS_ONLY mode, if NO, S1
Go to 02 and switch to AUTO mode.

FIG. 3 shows the details of the key 30 and the switching of the display of the display 32 when the feed key is turned on in the switching mode for switching the interrupt mode. The key 30 has left and right feed keys, and every time the feed key is turned on, the display on the display 32 is clockwise or counterclockwise, in AUTO mode, DAB_O.
The mode is switched to the NLY mode and the RDS_ONLY mode.

[Brief description of the drawings]

FIG. 1 is a flowchart of an interrupt processing assignment routine.

FIG. 2 is a flowchart of an interrupt mode switching routine.

FIG. 3 is a diagram showing switching of the display of a display when a feed key is turned on in a switching mode for switching details of an interrupt mode and details of a key.

FIG. 4 is a system configuration diagram of a DAB tuner.

FIG. 5 is a block diagram of a DAB / RDS shared radio mounted on a vehicle.

FIG. 6 is a diagram showing the structure of a DAB transmission frame.

FIG. 7 is an exemplary diagram of a DAB service structure;

FIG. 8 is a structural diagram of an FIB.

FIG. 9 is a structural diagram of a FIG data area in which FIG type is 0 in FIG. 8;

FIG. 10 is a structural diagram of a type 0 region of FIG0 / 18.

FIG. 11 is a structural diagram of a type 0 region of FIG0 / 19.

[Explanation of symbols]

30 key (selection means) 32 display (interrupt mode display means interrupt display means) 40 DAB / RDS shared radio (broadcast receiver) mounted on car 46 microcomputer (audio output means)

[Procedure amendment]

[Submission date] February 20, 1997

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction contents]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plurality of transmission systems, for example, DAB (Digital Audio Bro).
advertising: digital audio broadcasting) and R
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast receiver that can receive a DS (Radio Data System) transmission signal, and more particularly to a broadcast receiver with improved interrupt information processing.

Claims (6)

[Claims] 1. A broadcast receiver (40) which can receive transmission signals transmitted by different transmission methods, and each transmission method includes interrupt information data together with audio data, wherein an audio output of a program of a predetermined transmission method is provided. The transmission signal of the other transmission method is also received together with the transmission signal of the transmission method, and the interruption information included in the transmission signal of the transmission method and the other transmission method is appropriately output as audio. Broadcast receiver. 2. A broadcast receiver (40), which can receive transmission signals transmitted by different transmission systems, each of which includes interrupt information data together with audio data. A broadcast receiver characterized in that it receives a transmission signal of a transmission system and appropriately outputs interrupt information included in the transmission signal of the transmission system as audio. And (b) selecting means for selecting one or a plurality of transmission schemes permitting output of interrupt information, and (b) selecting a transmission scheme selected by the selection means (30). 3. The broadcast receiver according to claim 1, further comprising audio output means for outputting the interruption information of the transmission signal as audio. 4. The audio output means (46) outputs audio for a predetermined type of interrupt information irrespective of selection by the selection means (30). Broadcast receiver. 5. An apparatus according to claim 3, further comprising an interruption mode display means for displaying a transmission mode selected by said selection means as an interruption mode.
The broadcast receiver as described. 6. An interruption display means (32) for displaying that interruption is being performed while the audio output means (46) outputs interruption information as audio. A broadcast receiver according to any one of claims 1 to 5.