JP3466407B2 - Broadcast receiver - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plurality of transmission systems such as DAB (Digital Audio Br).
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast receiver capable of receiving transmission signals of audcasting (digital audio broadcasting) and RDS (Radio Data System), and more particularly, to a broadcast receiver with improved interrupt information processing.

[0002]

2. Description of the Related Art DAB has been attracting attention as a radio broadcasting format that can cope with deterioration of sound quality due to interference caused by multi-channel FM broadcasting and difficulty in receiving high-quality signals by a mobile body. DA
B is being developed by EUREKA (European Advanced Technology Development Plan) and has already been specified. The modulation method is π / 4 shift DQPSK-OFDM.
(Differential Quadrature
Phase Shift Keying-Orthog
onal Frequency Division M
ultiplex: orthogonal frequency division multiplexing)
It is characterized by being less susceptible to fading and multipath, and uses MPEG layer II for high-efficiency voice coding for voice coding, enabling a large number of stereo and data broadcasts with a transmission bandwidth of 1.5 MHz. ing.

On the other hand, RDS is used as an existing radio broadcasting format.
Exists and AM and F as in present Japan
Like the radio that can receive both M broadcasting systems, RD
Radios capable of receiving both S and DAB broadcast formats have been developed. In addition, the broadcast waves of DAB and RDS include audio data and data relating to interrupt information, and when the interrupt information is received, the interrupt information is appropriately output as audio.

[0004]

A radio that receives both DAB and RDS is a DA that emits sound from a speaker or the like in the same manner as AM and FM radio.
The interruption information is switched to one of the B and RDS radio waves, and the interrupt information that is output is limited to the broadcast format of the person making sound from the speaker at that time. Also, CD
While playing (compact disc), the speaker etc. is C
Even if it is switched to D output and there is interrupt information,
It is difficult for the user to know the interrupt information.

An object of the present invention is to provide a broadcast receiver which can deal with such a problem.

[0006]

A broadcast receiver (40) of the present invention can receive a transmission signal transmitted by different transmission systems, and each transmission system has interruption information together with audio data.
It contains information . Then, the broadcast receiver (40) receives the transmission signal of the other transmission method together with the transmission signal of the transmission method during the audio output of the program of the predetermined transmission method, and the transmission signal of the transmission method and the transmission signal of the other transmission method. The interrupt information included in is properly made available for audio output.

The transmission format of the different types of transmission methods is not limited to radio waves, but includes other transmission formats such as electric signals by a cable and optical signals by an optical fiber.

The audio output includes not only a speaker but also a headphone, an earphone and the like.

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

According to another broadcast receiver (40) of the present invention, it is possible to receive transmission signals transmitted by different transmission systems,
Each transmission method includes interrupt information as well as audio data. Then, the broadcast receiver (40) receives the transmission signal of each transmission method and puts the interrupt information included in the transmission signal of the transmission method into an audio output state as appropriate while the audio player is operating.

Only a CD player can be used as an audio player.
Not encompasses MD player and a tape player or the like, all of the audio player that can play audio recorded. The operation of the audio player includes not only the reproduction operation but also the music selection and the tape rewinding.

In this way, the user can avoid missing the interruption information even while the audio player is operating, such as when the audio player is playing.

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 methods that permit output of interruption information (b) Audio output of interruption information of transmission signals related to the transmission method selected by the selection means (30) Audio output means (46)

The user can select only one or a plurality of transmission methods for outputting the interruption information by audio from a plurality of transmission methods and can hear only the desired interruption information.

In another broadcast receiver (40) of the present invention,
Further, the audio output means (46) outputs the audio to the predetermined type of interrupt information regardless of the selection by the selection means (30).

There are a plurality of types of interrupt information, for example, traffic information and alarms for transmitting emergency information such as a disaster occurrence. For example, since alarms have urgency and importance, the selecting means (30) is used. Regardless of the user's selection, audio output can be made to inform the user.

The other broadcast receiver (40) of the present invention further includes an interrupt mode display means (3) for displaying the transmission method selected by the selection means (30) as an interrupt mode.
2).

This allows the user to know which interrupt mode is currently in effect.

The other broadcast receiver (40) of the present invention further includes interrupt display means (32) for displaying that an interrupt is being performed while the audio output means (46) is outputting the interrupt information as audio. Have

The interrupt mode display means (32) and the interrupt display means (32) may be the same display device or different display devices. As an example of the interrupt display, there is also a display that indicates which transmission method the interrupt is from, such as "outputting interrupt information from RDS", in addition to simply "interrupting".

As a result, the user can know that the sound being played through the speaker or the like at that time is due to the interruption.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Figure 4 shows the DAB tuner 1
It is a system configuration diagram of 0. The DAB tuner 10 is equipped with a main body 12, a DAB control microcomputer 26 that is separate from the main body 12, and the like. In the main body 12, the DAB system microcomputer 14 has a memory 16 and has a plurality of ensembles (each ensemble is transmitted by a radio broadcast radio wave modulated by DQPSK-OFDM, and one ensemble has a bandwidth of about 1. 5 MHz, which usually includes 6 broadcast programs.) One ensemble is designated, and designation information is sent to the RF block 18. R
The F block 18 is an ensemble RF (Radio Freq) designated by the DAB system microcomputer 14.
uency) and sends it to the demodulation block 20. The demodulation block 20 demodulates the RF signal from the RF block 18, and the channel decoding block 22 demodulates the demodulation block 2
The demodulated signal by 0 is decoded. In this way, all digital signals of one ensemble designated from the DAB system microcomputer 14 to the RF block 18 are converted into the channel decoding block 2
Obtained in 2. Of the digital signals decoded in the channel decoding block 22, audio data is converted from the channel decoding block 22 to the audio decoding block 2
4 and FIG. 4 other than the audio data such as program type (FIG. Will be described later) is sent from the channel decoding block 22 to the DAB system microcomputer 14. The audio decoding block 24 receives the D data from the audio data input from the channel decoding block 22.
The audio data of the sub-channel instructed from the AB system microcomputer 14 is decoded, and the left and right speakers 54 are
(Fig. 5). The DAB control microcomputer 26
It has a memory 28 and exchanges data with the DAB system microcomputer 14 of the main body 12. The DAB control microcomputer 26 inputs an instruction from the user through the key 30 and outputs predetermined data to the display 32 to display the information and inform the user.

FIG. 5 is a block diagram of a DAB / RDS shared radio 40 mounted on a vehicle. CD player 42, RDS
The outputs of the tuner 44 and DAB tuner 10 are sent to the switch 48. The microcomputer 46 is the DAB system microcomputer 14 and the DAB control microcomputer 26 of FIG.
Which controls the connection between the volume 50 and the CD player 42, the RDS tuner 44, and the DAB tuner 10 via the switch 48, and selects from the outputs of the CD player 42, the RDS tuner 44, and the DAB tuner 10. To the volume 50. Volume 50 is
The volume of the sound emitted from the speaker 54 is adjusted, 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.

6 to 11, the communication protocols of various elements of the DAB such as transmission frames are appropriately described. For details, refer to the European Telecommunications Standards Institute.
animations Standards Insti
te) European Telecommunications Standard (European Telecommunicat)
ions Standard).

FIG. 6 shows the structure of a DAB transmission frame. Transmission frame (Transmission frame)
me) is a synchronization channel and FIC (Fast) in order from the front.
Information Channel), and M
It has an SC (Main Service Channel). The FIC further includes a plurality of FIBs (Fast
Information Block), M
The SC further includes a plurality of CIFs (Common Inte
released frame). The specifications of the DAB are determined from mode 1 to mode 3, and the duration of a transmission frame and the number of FIBs and CIFs within one transmission frame are different for each mode. For example, in mode 1, the time of one transmission frame is 96 ms, and the numbers of FIB and CIF in one transmission frame are 12 and 4, respectively.

FIG. 7 is an exemplary diagram of a DAB service structure. Ensemble label is DAB Ensemble 1 (DA
Ensemble, which is B ENSEMBLE ONE, has a service label of alpha 1
Radio (ALPHA 1 RADIO), Beta Radio (BETA RADIO), Alpha 2 Radio (ALP)
HA2 RADIO) and other services (Servi)
ce) is included. The user will hear the selected service from the DAB radio 10.

The alpha 1 radio has one main service component (Service components) and two sub service components, respectively. The main service component is audio, and the sub service component is a traffic message channel: TMC (Traf).
fic Message Channel) and service information: SI (Service Information)
Is. The audio component and the SI are transmitted on separate subchannels (SubCh) in the MSC, and the TMC is the 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 MSCs
Will be posted on the subchannel of.

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 of switches.

FIG. 8 is a structural diagram of the FIB. FIB is
It consists of 256 bits in total, and has a 30-byte FI at the front.
B data area (FIB data field) and a rear 16-bit CRC (Cyclic Redunda)
ncy Check word). The FIB data area further includes a plurality of FIGs (Fas (Fas) in order from the front.
t Information Group, one end marker, and one padding (put 0 in the remaining bits to fit the FIB data area into a byte). The portion of FIG is a useful data area (useful data fi
eld). Each FIG.
Type, Length (length: represents the bit length of the subsequent FIG data area), FIG data area (FIG.
data field). FIG type and L
The length constitutes the FIG header.

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

[0032] FIG. 10 of the FIG of Figure 9, Extens
ion is 18 (hereinafter, each FIG is referred to as FIG type and Ext
It is expressed as "fig0 / 18" with "ension". 3 is a structural diagram of a type 0 area of FIG. The type 0 area also includes multiple announcement supports (Announ).
cement support. Announcement = interrupt. ) Area. Each announcement support is based on SId (Service Identity
r), Asu_flags (Asu = Announce)
ment support) and data of Cluster_Id are included. SId indicates for which service. Each bit of Asu_flags corresponds to the type of interrupt information (eg, an alarm corresponds to bit 0 in the interrupt information), and Cluster_Id is
The cluster to which this SId belongs is shown. Cluster
SIds having the same r_Id share interrupt information.

FIG. 11 shows the extension of FIG. 9 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 switching (Announcement s).
Witching). Each announcement switching is Asw (Announcement sw).
itching) _flags, Cluster_I
d, SubChId and the like. Asw_flags
Has the same meaning as each bit of Asu_flags of FIG0 / 18, and corresponds to the type of interrupt information. Cluster_Id indicates a cluster, and Su
bChId indicates a sub-channel carrying interrupt information for this cluster. Reception of FIg0 / 19 means that an announcement (= interrupt) has occurred. From FIG0 / 18 and FIG0 / 19,
It is possible to detect which sub-channel an interrupt occurs and the content of the interrupt information is.

FIG. 1 is a flowchart of the interrupt processing allocation routine. In S60, it is determined whether or not there is an interrupt request. 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, and YE
If S, proceed to S86 to perform ALARM interrupt processing, and if NO, proceed to S64. In S64, it is determined whether or not the interrupt function is ON, that is, whether or not the user allows interrupt information when there is interrupt information, and 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 the interrupt is accepted from any of DAB and RDS. If YES, the process proceeds to S72, and if NO, the process proceeds to S68. . In S68, the interrupt mode is DAB
Whether or not _0NLY is set, that is, whether or not only the interrupt from the DAB is permitted is determined. If YES, the process proceeds to S76, and if NO, the process proceeds to S70. S7
In 0, it is determined whether the interrupt mode is RDS_0NLY, that is, whether only the interrupt from the RDS is accepted, and if YES, the process proceeds to S82 and NO.
If so, the routine ends. In S72, it is determined whether or not the CD is being played (reproduced). If YES, the process proceeds to S74, and if NO, the process proceeds to S78. S7
In 4, it is determined whether the band received before the reproduction of the CD is DAB or RDS. If it is DAB, the process proceeds to S76 and R
If DS, proceed to S80. In S76, it is determined whether or not it 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. S
At 80, it is judged whether the request is an RDS interrupt request,
If YES, then proceed to S82, and if NO, S60.
Return to. In S82, RDS interrupt processing is performed. S8
At 4, DAB interrupt processing is performed.

In the flowchart of FIG. 1, the AU of S66.
If YES in the determination as to whether the mode is the TO mode, S
It is designed to proceed to 72, but as another method,
If yes, then the interrupt is RDS or D
If it is an AB interrupt, and if it is an RDS interrupt, proceed to S82, perform RDS interrupt processing, and set DA
If it is a B interrupt, the process may proceed to S82 to set the DAB interrupt process.

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

FIG. 3 shows the details of the key 30 and the switching of the display on 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 each time the feed key is turned on, the display 3
The display of 2 is clockwise or counterclockwise, AUTO mode, D
The mode is switched to the AB_ONLY mode and the RDS_ONLY mode.

[Brief description of drawings]

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

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

FIG. 3 is a diagram showing details of keys and switching of display on a display unit when a feed key is turned on in a switching mode for switching between interrupt modes.

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

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

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

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

FIG. 8 is a structural diagram of FIB.

FIG. 9 is a structural diagram of a FIG data area of FIG. 8 whose FIG type is 0.

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 keys (selection means) 32 display (interruption mode display means interrupt display means) 40 car-mounted DAB / RDS shared radio (broadcast receiver) 46 microcomputer (audio output means)

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04H 1/00 H04B 1/06-1/18

Claims (6)

(57) [Claims] 1. A broadcast receiver (40) capable of receiving transmission signals transmitted by different transmission methods, each transmission method including interruption information, and transmitting the audio while a program of a predetermined transmission method is being output. Receiving means for receiving a transmission signal of another transmission method together with the transmission signal of the transmission method, selecting means for selecting one or a plurality of transmission methods permitting the output of interrupt information, and a transmission signal received by the receiving means. An audio output unit for outputting the interrupt information of the transmission signal according to the transmission method selected by the selection unit as an audio signal. 2. A broadcast receiver (40) capable of receiving transmission signals transmitted by different transmission methods, each transmission method including interrupt information, and transmitting signals of each transmission method during operation of an audio player. Receiving means, a selecting means for selecting one or a plurality of transmission methods that allow the output of interrupt information, and a transmission signal received by the receiving means for the transmission method selected by the selecting means. A broadcast receiver having audio output means for outputting the interrupt information of the transmission signal as an audio. 3. A broadcast receiver (40) capable of receiving transmission signals transmitted by different transmission systems, each transmission system including interrupt information, and receiving means for receiving the transmission signal of each transmission system. A determining unit that determines the type of interrupt information of the transmission signal received by the receiving unit; and an audio output unit that outputs predetermined interrupt information as audio based on the determination of the type of interrupt information by the determining unit. A broadcast receiver characterized by being installed. 4. A broadcasting receiver (40) capable of receiving transmission signals transmitted by different transmission methods, each transmission method including interrupt information, and transmitting the audio while a program of a predetermined transmission method is being output. Receiving means for receiving another transmission signal together with the transmission signal of the system, selecting means for selecting one or a plurality of transmission methods permitting output of interrupt information, and interruption information of the transmission signal received by the receiving means Determining means for determining the type of the interrupt information, and for the interrupt information determined to be interrupt information of a predetermined type by the determining means, an audio output means for outputting the interrupt information regardless of selection by the selecting means, A broadcast receiver characterized by having. 5. A broadcast receiver (40) capable of receiving transmission signals transmitted by different transmission methods, each transmission method including interrupt information, and transmitting signals of each transmission method during operation of an audio player. Receiving means for receiving the interrupt information, selecting means for selecting one or a plurality of transmission methods permitting the output of interrupt information, and determining means for determining the type of interrupt information of the transmission signal received by the receiving means, For the interrupt information determined to be the predetermined type of interrupt information by the determination means, there is provided audio output means for outputting the interrupt information regardless of the selection by the selection means. Broadcast receiver to do. 6. An interrupt mode display means (32) for displaying the transmission mode selected by the selection means (30) as an interrupt mode, according to claim 1, 2, 4 or 5. Broadcast receiver described.