JP2001086017A - Digital broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit a user to efficiently select a secondary program service component with respect to a DAB car radio. SOLUTION: When the same service has primary and secondary program service components, the primary program service component and the secondary program service component belonging to service similar to it are preset in the preset key 21 of an operation part 20. An output from a speaker 17 is set as the primary program service component which is preset in the preset key 21 is the initial operation of the preset key 21. When the preset key 21 is operated continuously, the primary and secondary program service components belonging to the same service are alternately switched at every operation, in the second and subsequent operations.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to, for example, DAB
(Digital Audio Broadcasti
The present invention relates to a digital broadcast receiver for receiving digital broadcasts such as ng), and more particularly, to a digital broadcast receiver in which the switching between primary and secondary service components is improved.

[0002]

2. Description of the Related Art In DAB as digital radio broadcasting, a program service component exists as an output unit from a service component output means such as a speaker, and each program service component is classified into a primary or secondary service component, and the same service component is provided. In addition, one or a plurality of secondary service components may belong in addition to one primary service component.

On the other hand, in the DAB car radio, each program service component of the DAB is preset to a plurality of preset keys, and when the user presses the preset key, the program service component preset to the preset key is selected. I can do it.

[0004]

In many cases, the primary and secondary program service components belonging to the same service are related, and the user is required to change the program service component currently output from the speaker.
It may be desired to switch to another primary or secondary program service component belonging to the same service as the program service component. In such a conventional DAB car radio, in such a case, it is necessary for the user himself to find and press the relevant preset key, and the program service component belonging to the same service as the program service component currently being output from the speaker is required. It is necessary to remember which preset key is preset, which is complicated.

It is an object of the present invention to provide a digital broadcast receiver which overcomes the above-mentioned problems.

[0006]

According to the digital broadcast receiver (10) of the present invention, the same service includes a primary service component and a secondary service component,
The primary or secondary service component selected by the user is output from the service component output means (17). In the digital broadcast receiver (10), when the primary / secondary switching operation member is operated, the output from the service component output means (17) is changed from the service component output means (17) to the service currently being output. The output is switched to the output of the other primary or secondary service component to which it belongs.

[0007] Digital broadcasting includes not only digital radio broadcasting but also digital television broadcasting.
The digital broadcast receiver (10) particularly includes a digital car radio, and includes not only a digital radio broadcast receiver but also a digital television broadcast receiver.

[0008] The secondary service component must be able to be output from the service component output means (17) common to the primary service component. When the digital broadcast is a digital radio broadcast, the secondary service component is an audio service component, and the service component output means (17) is a sound output means such as a speaker or an earphone. If the digital broadcast is a digital television broadcast, the secondary service component is AV (Aud
io & Video) service component, and the service component output means (17) includes both audio output means and video output means such as a monitor.

Although the number of primary service components belonging to the same service is 1, the number of secondary service components belonging to the same service is (a) 0, (b)
1 or (c) plural. Service component output means (17)
In the case where the service component currently being output is primary, in the case of (a), the service component output means is provided despite the operation of the primary / secondary switching operation member.
It is difficult to switch the output from (17). In the case of (b), the output of the service component output means (17) is switched to the secondary service component, and in the case of (c), the service component output means. The output of (17) is switched to a predetermined service component among a plurality of secondary service components. When the service component currently being output from the service component output means (17) is secondary, the service component output means (1
The output from 7) is a primary service component in the case of (b), but is not limited to the primary service component in the case of (c), and may be another secondary service component.

[0010] Primary and secondary service components belonging to the same service can be easily detected from information included in digital broadcasting. For example, in DAB, the service ID is the same, that is, FIG. 0/2 includes information on all primary and secondary service components belonging to the same service.

The user sometimes wants to listen to or view another service component belonging to the same service as the service component currently being output from the service component output means (17). In such a case, the user simply operates the primary / secondary switching operation member to transfer the output from the service component output means (17) to another service component belonging to the same service as the service component currently being output. Switching can be performed efficiently.

According to the digital broadcast receiver (10) of the present invention (corresponding to FIG. 10), the primary / secondary switching operation members are each composed of one primary service component selection operation member and one secondary service component selection operation member. The primary and secondary service components belonging to the same service are included in the primary service component selecting operating member and the secondary service component selecting operating member of each set. Each is preset.

When the user wants the primary and secondary service components belonging to the same service to be output from the service component output means (17), the primary service component selecting operation member and the secondary service component selecting component constituting the set are output. This can be achieved by manipulating the operating member. The configuration of the set of the primary service component selecting operation member and the secondary service component selecting operation member may be, for example, a method in which a plurality of primary service component selecting operation members are arranged in the first stage of the operation unit, and the second stage. , A plurality of secondary service component selecting operation members are arranged, and the primary service component selecting operation members and the secondary service component selecting operation members located in opposite positions, that is, in the same arrangement order, constitute a set.

According to the digital broadcast receiver (10) of the present invention (corresponding to FIG. 11), the same service includes a primary service component and a secondary service component,
The primary or secondary service component selected by the user is output from the service component output means (17). In this digital broadcast receiver (10), a plurality of primary service components are preset in each preset operation member (21) so that the output from the service component output means (17) can be appropriately switched by a user operation. In advance, when the primary / secondary switching operation member is operated, the output from the service component output means (17) is changed from the service component output means (17) to the same service as the currently output primary service component. The service component is switched to the secondary service component to which it belongs.

It is assumed that the primary / secondary switching operation member does not need to be provided exclusively. For example, an already provided up / down key may be used (in FIG. 11, this means that the primary / secondary switching key 22 is made up of two keys, an up key and a down key). For example, the service component output means (1
If the service component being output from 7) is primary, the output from the service component output means (17) is operated by operating the down key, and the secondary service component belonging to the same service as the primary service component being output is output. When the down key is further pressed, the service component is switched to the next primary service component in descending order (predetermined order is assigned to the primary service components). When the service component being output from the service component output means (17) is secondary, the output from the service component output means (17) is the same as the secondary service component being output by operating the up key. Is switched to the primary service component belonging to the service,
By pressing the up key, it is possible to switch to the next primary service component in ascending order.

In this manner, the user operates the primary / secondary switching operation member to output the output from the service component output means (17) to the secondary service belonging to the same service as the primary service component currently being output. It is possible to efficiently switch to the components.

According to the digital broadcast receiver (10) of the present invention (corresponding to FIG. 11), the user operates the primary / secondary switching operation member (in FIG. 11, the primary / secondary switching operation member is the primary / secondary switching key). twenty two
Corresponding to ), The output from the service component output means (17) is one and the same as one primary service component belonging to the same service for each operation of the primary / secondary switching operation member. Switching to a plurality of secondary service components is performed alternately or cyclically.

Although the service component of the secondary audio or AV belonging to one service is usually one,
In some cases, two or more secondary audio or AV service components belong to one service. In this case, one primary service component and two or more secondary service components are preset in one preset operation member (21).
Secondary audio or A belonging to one service
In the case where the number of service components of V is one, the output from the service component output means (17) is set to one primary service component and the secondary service component belonging to the same service for each operation of the primary / secondary switching operation member. Alternately with the service component. Further, when the number of secondary audio or AV service components belonging to one service is two or more, the number of service components belonging to one service becomes three or more, and each time the primary / secondary switching operation member is operated. Then, the output from the service component output means (17) is cyclically switched to the three or more service components.

In this way, every time the primary / secondary switching operation member is operated, the service component output from the service component output means (17) is alternately switched between primary and secondary, switched to the secondary service component, and then again. The output from the service component output means (17) can be efficiently returned to the primary service component belonging to the same service as the secondary service component.

According to the digital broadcast receiver (10) of the present invention (corresponding to FIG. 12), the primary and secondary service components belonging to the same service are preset on the same preset operation member (21), and the first and second service components are preset. In the operation of the preset operation member (21) according to the operation mode of (1), the output from the service component output means (17) is
In the operation of the preset operation member (21) according to the second operation mode which is output as a predetermined one service component preset in (21) and is distinguished from the first operation mode, primary / secondary switching is performed. The same function as that of the operation of the operating member is provided.

For example, if the first operation mode is the first pressing operation of the preset operation member (21) for less than a predetermined time, the second operation mode is (a) the same preset operation member (21). And (b) pressing for more than a predetermined time,
And (c) there are two successive push operations within a predetermined time, such as a double click versus a single click.

When the preset operation member (21) is a primary /
By also functioning as a secondary switching operation member,
The disabling of the primary / secondary switching operation member can be omitted.

According to the digital broadcast receiver (10) of the present invention (corresponding to FIG. 12), the primary and secondary service components belonging to the same service are preset on the same preset operation member (21), First and second operation modes that can be distinguished for the operation of the operation member (21) are set, and in the operation of the preset operation member (21) according to the first operation mode, the output from the service component output unit (17) is performed. Is switched to the output of the primary service component preset in the preset operation member (21). In the operation of the preset operation member (21) according to the second operation mode, the service component output means (17) Is switched to the output of the secondary service component preset in the preset operation member (21).

In this way, the primary and secondary service components can be read out as outputs from the service component output means (17) by operating the preset operation member (21) in the first and second operation modes, respectively.
The user can select the primary and secondary service components from the beginning.

According to the digital broadcast receiver (10) of the present invention, when the primary and secondary service components belonging to the same service are automatically preset on the same preset operation member (21), first, each preset is used. The primary service component is preset in the operating member (21). After presetting all the primary service components in the same ensemble to each preset operating member (21), the same service as the primary service component preset to each preset operating member (21) is determined, and the service is determined. The secondary service component belonging to the preset operation member (21) is preset.

Thus, each preset operation member (21)
In addition, primary and secondary service components belonging to the same service can be efficiently preset.

[0027]

Embodiments of the present invention will be described below with reference to the drawings. Figure 1 shows a DAB car radio 10
It is a block diagram of. DAB tuner 11 has antenna 12
From among the received signals received in step (1), a received signal having an ensemble frequency including a service component designated by the CPU 13 is selected, detected, and output to the analog-digital converter 14. Analog-digital converter 14
Converts the analog detection signal from the DAB tuner 11 into a digital signal and outputs it to the DSP 15. DSP15
Performs decoding including error correction and the like, generates an audio bit stream of a service component instructed to be output from the CPU 13, and outputs the audio bit stream to the digital-analog converter 16. The digital-analog converter 16 converts a digital signal from the DSP 15 into an analog signal,
Converts an input signal from the digital-analog converter 16 into audio of a predetermined volume and outputs the audio. Operation unit 20
Is provided with a plurality of preset keys 21.
An instruction is issued to the CPU 13 through the operation of the 20 preset keys 21 and the like.

In FIGS. 2 to 6, communication protocols of various elements of DAB such as a transmission frame are described as appropriate. For details, see the European Telecommunications Standards Association (European Telecommunications).
indications Standards Institute
European Telecommunications Standard (European Telecommunications)
ionics Standard).

FIG. 2 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 specifications of DAB are determined from mode 1 to mode 4, 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. 3 is a view showing an example of the DAB service structure. The ensemble (Ensemble) whose ensemble label (ensemble name) is DAB ENSEMBLE ONE has a service label of Alpha 1 Radio (ALPHA1 RADIUS).
O), a plurality of services such as beta radio (BETA RADIO) and alpha 2 radio (ALPHA2 RADIO). The user hears the selected service from the DAB car radio 10.

[0031] The alpha 1 radio is a primary (pri
service component (Service comp)
onent) and one secondary (secondar)
It has two service components of y). The primary service component is audio, and the secondary service component is alpha TMC (Tr
Affiliate Message Channel) and Alpha SISIS Service In
formation: service information). Audio and SI are on separate subchannels (SubC
h), and the TMC is transmitted in the FIDC (Fas
t Information Data Channel
1).

Beta radio has two service components.
Primary audio and secondary audio (2
nd-ry Audio), both of which are placed on a sub-channel of the MSC.

The alpha 2 radio has the same alpha TMC and alpha SI as the alpha 1 radio, in addition to having its own audio as a primary service component,
By switching the switch, the audio can be made the same as the alpha 1 radio.

FIG. 4 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. 5 is a structural diagram of the FIG data area of FIG. 4 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
Id is the 32-bit Sid used for data service
Means that This P / D is Extension
Are 2, 9, 23 and 24, and when not used, SId is in 16-bit format.

FIG. 6 is a structural diagram of FIG. 0/2. Note that each FIG is represented by the FIG type and the Extension as FIG0 / 2. The type 0 area has a plurality of service (v... K... T) areas. The service ID (SI
d) together with the number of service components (Number ofc
components), service component description (Servi
ce comp. (description) is written. FIG. 0/2 includes the number of service component descriptions by the number of service components. Then, in the service component description, when TMId = 00 (MSC stream audio) and P / S (Primary / Secondary: Primary / Secondary) = 0, the service component may be a secondary audio broadcast. I understand. Therefore, for all the service component descriptions included in FIG0 / 2, the TMId and P / S are checked, and the number of service component descriptions for which TMId = 00 and P / S = 0 is counted, and the number is included in this service. This is the total number of secondary audio broadcasts. Further, the subchannel of the MSC carrying the secondary service component can be grasped from the SubChld of FIG0 / 2, and by decoding this subchannel, the secondary audio broadcast can be output to a speaker or the like.

In this way, the DAB can detect primary and secondary service components belonging to the same service from the information of FIG0 / 2. In addition,
In the flowchart described later, the service component preset to the preset key 21 of the operation unit 20 is limited to the program service component, and the data service component is not preset to the preset key 21.

FIG. 7 is a flowchart of a program for individually presetting service components in the preset keys 21 of the operation unit 20. This program is executed when the user designates an individual preset from the operation unit 20. Note that in the flowcharts of FIG. 7 and subsequent drawings, even if simply described as “service component”, it means “program service component” and excludes the data service component. S3
In the case of 0, the program service component being output from the speaker 17 is preset to a predetermined preset key 21, for example, a preset key 21 that has not been preset or has a preset permission, if any. Note that the program service component currently being output from the speaker 17 is not limited to the primary program service component, but may be a secondary program service component. S
At 31, it is determined whether or not there is another program service component belonging to the same service as the program service component preset at S30.
If S, the process proceeds to S32. If NO, the program ends. In S32, another program service component found in S31 is preset to the preset key 21 preset in S30. Each service always has only one primary program service component, but the secondary program service component may not have one, may have only one, or may have two or more. . Therefore, by executing the program, the preset key 21 preset in S30 has one primary program service component and 0
One, one, or a plurality of secondary program service components are commonly preset.

FIG. 8 shows a program service component that can be output from the speaker 17 at this time.
3 is a flowchart of a program for automatically presetting a program. This program is executed when the user instructs the automatic preset from the operation unit 20. In S40,
It is determined whether an ensemble that has not yet been searched has been detected (searched) in the current automatic search and automatic preset, and if the determination is YES, the process proceeds to S41 and N
If O, the program ends. In S41, S
In the ensemble searched in 40, it is determined whether or not a service that has not been searched has been detected (searched). If the determination is YES, the process proceeds to S42. If the service has been searched, the process returns to S40. S4
In 2, it is determined whether or not there is a preset key 21 for preset permission. If the determination is YES, the process proceeds to S43 and N
If O, the program ends. Note that the preset key 21 that permits presetting includes both a preset key 21 that has not been preset and a preset key 21 that has been preset but may change the program service component to be preset. S43
Then, all the program service components belonging to the service searched in S41 are preset in the preset permission preset key 21 found in S42. After the process in S43, the process returns to S41. Thus, as long as there is a preset key 21 that allows presetting, the primary service and the secondary of all the program service components of all the ensembles that can be heard at the current point belong to the same service. Is done.

FIG. 9 is a flowchart of a program for operating the preset key 21. In S50, it is determined whether or not the user has operated the preset key 21, and if the determination is YES, the process proceeds to S51, and if the determination is NO, the program ends. In S51, the program service component currently being output from the speaker 17 (this program service component may be primary or secondary) is replaced with the preset key operated in S50.
21. That is, it is determined whether or not it is one of the program service components preset in the preset key 21 operated in S50. If the determination is YES, the process proceeds to S52, and if NO, If there is, go to S54. S5
In 2, it is determined whether the secondary program service component is preset in the preset key 21 operated in S50. If the determination is YES, the process proceeds to S53, and if the determination is NO, the process proceeds to S54. In S53, the primary and secondary program service components output from the speaker 17 are switched. That is, if the program service component output from the speaker 17 is the primary one up to the present, the program service component output from the speaker 17 is switched to the secondary program service component of the same hitting service, and the output from the speaker 17 is the current output. If the current program service component is secondary, the program service component output from the speaker 17 is switched to the primary program service component of the same service. In S54, the program service component output from the speaker 17 is set as the primary program service component preset in the preset key 21 operated in S50. Thus, from speaker 17
The program service component being output is (a) a program service component different from the program service component preset in the preset key 21 operated in S50, and (b) an operation performed in S50. If the secondary program service component has not been preset in the preset key 21, the program service component from the speaker 17 is switched to the primary program service component preset in the preset key 21 operated in S50. If the program service component currently being output from the speaker 17 is (c) the program service component preset in the preset key 21 operated in S50, it is currently output from the speaker 17. The program service component is transferred to another program service component belonging to the same service as the program service component, that is, if the program service component currently output from the speaker 17 is the primary program service component, the program service component is To the secondary program service component belonging to the same service,
When the output program service component is the secondary program service component, the output is switched to the primary program service component belonging to the same service as the program service component.

FIG. 10 shows a preset key on the operation unit 20.
21 shows an example of arrangement. The preset keys 21 are a primary preset key 21a1-an of a series in which a primary service component is preset, and a secondary preset key of a series in which a secondary service component is preset.
21b1-bn, the same number of primary preset keys 21a1-an and secondary preset keys 21b1-bn,
Each row extends in the horizontal direction at equal intervals. The corresponding ones of the primary preset key 21a1-an and the secondary preset key 21b1-bn are aligned in the horizontal direction and form a set, and the primary service component and the secondary service component belonging to the same service are respectively preset. It has become so. As previously mentioned,
In DAB, the primary service component has only one audio, while the secondary service component may include two or more audio service components. (I
1) When there is one secondary service component of audio belonging to the same service, the secondary service component is set to one predetermined secondary preset key 21.
Although preset to b1-bn, (i2) when there are two or more secondary service components of audio belonging to the same service, those secondary service components are assigned to a predetermined secondary preset key 21b1-bn. Preset in common. The primary / secondary changeover switch 22 is arranged near a row of the primary preset keys 21a1-an and the secondary preset keys 21b1-bn. When the user presses one of the primary preset keys 21a1-an and the secondary preset keys 21b1-bn in which the desired service component is preset, the sound of the service component is output from the speaker 17. In this state, the user sets the primary / secondary switch 22
Each time is pressed, in the case of (i1), the secondary service component or the primary service component belonging to the same service as the primary service component or the secondary service component that has been output so far is output from the speaker 17, Primary / secondary switch 22
Each time is pressed, the sound output from the speaker 17 is alternately switched to the primary service component and the secondary service component. In the case of (i2), every time the user presses the primary / secondary changeover switch 22, the service component of one primary and a plurality of secondary belonging to the same service as the service component currently being output from the speaker 17 is displayed. The output from the speaker 17 is cyclically switched to one of them.

In FIG. 10, the primary / secondary changeover switch 22 can be omitted. In this case, the user directly presses one of the primary preset keys 21a1-an and the secondary preset keys 21b1-bn corresponding to the primary or secondary service components of the service desired to be heard. Thereby, the audio of the service component corresponding to the preset keys 21a1-an and 21b1-bn is output from the speaker 17. further,
In the case of (i2), each time the user presses the same secondary preset key 21b1-bn, one of a plurality of secondary service components belonging to the same service as the service component currently being output from the speaker 17 is output. The output from the speaker 17 is cyclically switched. As shown in FIG. 10, when there is a primary / secondary changeover switch 22,
Even if the user does not know, for example, which service the service component output from the speaker 17 belongs to, the primary / secondary changeover switch can be used.
As long as 22 is pressed, another primary or secondary service component belonging to the same service as the service component currently output from the speaker 17 can be output from the speaker 17.

FIG. 11 shows a preset key on the operation unit 20.
21 shows another arrangement example of 21. Preset key 21c1-cn
Are arranged in a row in the horizontal direction at equal intervals, and primary and secondary audio service components belonging to the same service are commonly preset in each preset key 21c1-cn. In the case of (i2) above, one primary service component and a plurality of audio secondary service components are commonly preset by the preset key 21c1-cn related to the service. When the user first presses any of the preset keys 21c1-cn (hereinafter referred to as “the preset key” in this paragraph), the primary service component preset to the preset key is output from the speaker 17. The user
If the user presses the preset key twice, three times,... Continuously without pressing another preset key, the aforementioned (i1)
In the case of (1), the service component output from the speaker 17 alternates between primary and secondary, and in the case of (i2), one service component belonging to the same service as the service component currently being output from the speaker 17 is used. The output from the speaker 17 is cyclically switched to one of the primary and a plurality of secondary service components.

FIG. 12 shows a preset key on the operation unit 20.
21 shows still another arrangement example of 21. The difference from FIG. 11 is that the primary / secondary switch 22 in FIG. 10 is omitted. The first to third operation methods can be set as the operation method in the operation unit 20.

In the first operation method, when the user first presses any one of the preset keys 21c1-cn (hereinafter, referred to as "the preset key" in this paragraph), the preset key is preset. The primary service component is output from the speaker 17. When the user presses the preset key twice, three times,... Without pressing another preset key, in the case of (i1), the service component output from the speaker 17 is: The primary and secondary are alternately repeated, and the above (i2)
In the case of, the speaker 17 is assigned to one of the primary and the plurality of secondary service components belonging to the same service as the service component currently being output from the speaker 17.
Output is cyclically switched.

In the second operation mode, the preset key 21c1
For the operation of -cn, first and second push operations that can be distinguished from each other are defined. The first pressing operation is a pressing operation of the preset key for less than a predetermined time and the first pressing operation. The second operating mode is as follows: (a) the pressing of the second and subsequent preset keys when the same preset key is continuously operated; , (B)
The pressing operation is performed twice or more within a predetermined time, such as pressing for a predetermined time or more, or (c) double clicking for a single click. When the user selects one of the preset keys 21c1-cn (hereinafter, in this paragraph, "the preset key"
Say ) Is pressed for the first time, a primary service component preset to the preset key is output from the speaker 17. The user presses the preset key with a second pressing operation without pressing another preset key.
Subsequently, when the user presses once, twice,..., In the case of (i1), the service component output from the speaker 17 is:
The primary and the secondary are alternately repeated, and the (i
In the case of 2), the output from the speaker 17 is cyclically output to one of the primary and multiple secondary service components belonging to the same service as the service component currently being output from the speaker 17. Is switched to

In the third operation mode, similarly to the second operation mode, first and second pressing operations that can be distinguished from each other are defined for the operation of the preset keys 21c1-cn. When the user performs a first push operation on any of the preset keys 21c1-cn, the primary service component preset for the preset key is output from the speaker 17. When the user presses any of the preset keys 21c1-cn by the second pressing operation, the secondary service component preset to the preset key is output from the speaker 17. Assuming that the preset key that has been pressed the second time is the preset key, the user subsequently presses the preset key twice, three times, without pressing another preset key.
..., in the case of (i2) above, the secondary service component currently being output from the speaker 17 and one of a plurality of secondary service components belonging to the same service are transmitted from the speaker 17 to the secondary service component. The output is switched cyclically.

FIG. 13 shows preset keys on the operation unit 20.
21 shows still another arrangement example of 21. The operation unit 20 is provided with one primary preset key 21d and one secondary preset key 21e. A plurality of primary service components are preset in the primary preset key 21d. Every time the user presses the primary preset key 21d, the primary service component output from the speaker 17 is cyclically switched. When the user presses the secondary preset key 21e while the primary service component is being output from the speaker 17, a secondary service component belonging to the same service as the primary service component output from the speaker 17 is output from the speaker 17 at that time. Will be output. When there are a plurality of audio secondary service components belonging to the same service, each time the user successively presses the secondary preset key 21e, the plurality of secondary service components belonging to the same service are cyclically switched. Output from the speaker 17.

FIG. 14 is a flowchart of another automatic search and automatic preset program different from FIG. FIG.
The program is applied to the operation unit 20 having the key arrangement of the operation unit 20 in FIGS. 11 and 12, that is, the key arrangement in which the primary / secondary switch 22 is omitted. S6
At 0, ensemble detection is instructed to the 11 PLLs. 15 analyzes whether an ensemble is detected based on the input from 11 (S61), and when an ensemble is detected (S62), presets primary service components of all services included in the ensemble to each preset key 21. (S63). Next, in S64, S63
For each primary service component preset in each preset key 21, it is detected whether or not the service including the primary service component includes a secondary service component. Preset the service component to its primary service component. Thus, each preset key 21 has one primary service component, zero (a) if the service does not include any audio service components and no secondary service components, and (b) if the service does not include any audio service components. 1 if only one service component is included
(C) If the service also includes a plurality of audio service components, the secondary service components are preset in common. In S65,
It is determined whether there is any other ensemble that can be preset in the preset key 21. If the determination is YES, the process proceeds to S66. If the determination is NO, the program ends. In S66, it is determined whether or not the preset key 21 in which the primary service component has not been preset remains, and if not, the program ends, and if it remains, the process returns to S60.

[Brief description of the drawings]

FIG. 1 is a block diagram of a DAB car radio.

FIG. 2 is a diagram illustrating a structure of a DAB transmission frame.

FIG. 3 is an exemplary diagram of a DAB service structure;

FIG. 4 is a structural diagram of an FIB.

FIG. 5 is a structural diagram of a FIG data area in which the FIG type in FIG. 4 is 0 (000 in 3-bit binary notation).

FIG. 6 is a structural diagram of FIG0 / 2.

FIG. 7 is a flowchart of a program for individually presetting service components on preset keys of the operation unit.

FIG. 8 is a flowchart of a program for automatically presetting a program service component that can be output from a speaker at a present time to a preset key of an operation unit.

FIG. 9 is a flowchart of a program for operating a preset key.

FIG. 10 is a diagram showing an example of the arrangement of preset keys on an operation unit.

FIG. 11 is a diagram showing another example of the arrangement of preset keys on the operation unit.

FIG. 12 is a diagram showing still another example of the arrangement of preset keys on the operation unit.

FIG. 13 is a diagram illustrating an example of the arrangement of preset keys on an operation unit.

FIG. 14 is a flowchart of another automatic search and automatic preset program.

[Explanation of symbols]

 10 DAB Car Radio (Digital Broadcast Receiver) 17 Speaker (Service Component Output Means) 21 Preset Key (Preset Operating Member)

Claims (7)

[Claims] 1. A digital broadcast wherein the same service includes a primary service component and a secondary service component, and a primary or secondary service component selected by a user is output from a service component output means (17). In the receiver (10), when the primary / secondary switching operation member is operated, the output from the service component output means (17) is output from the service component output means (17) to another service belonging to the service currently being output. A digital broadcast receiver adapted to switch to output of a primary or secondary service component. 2. The primary / secondary switching operating member includes a plurality of sets, each set including one primary service component selecting operating member and one secondary service component selecting operating member. The primary and secondary service components belonging to the same service are preset in the primary service component selection operation member and the secondary service component selection operation member of each set, respectively. Digital broadcast receiver as described. 3. A digital broadcast wherein the same service includes a primary service component and a secondary service component, and the primary or secondary service component selected by the user is output from the service component output means (17). In the receiver (10), a plurality of primary service components are preset in each preset operation member (21) so that the output from the service component output means (17) can be appropriately switched by a user operation, When the primary / secondary switching operation member is operated, the output from the service component output means (17) is output from the service component output means (17) to the secondary service belonging to the same service as the primary service component currently being output. A digital broadcast receiver characterized by switching to a service component. 4. When the user continuously operates the primary / secondary switching operation member, the output from the service component output means (17) is the same for each operation of the primary / secondary switching operation member. 4. The digital broadcast receiver according to claim 3, wherein the digital broadcast receiver alternately or cyclically switches between one primary service component and one or a plurality of secondary service components belonging to one of the services. . 5. The primary and secondary service components belonging to the same service are preset on the same preset operation member (21), and when the preset operation member (21) is operated in the first operation mode, the service component output is performed. means
The output from (17) is the output of a predetermined one service component preset in the preset operation member (21), and is used for the preset operation in the second operation mode that is distinguished from the first operation mode. In the operation of the operation member (21), the primary /
4. The digital broadcast receiver according to claim 3, wherein the digital broadcast receiver has the same function as that of operating the secondary switching operation member. 6. The primary and secondary service components belonging to the same service are preset on the same preset operation member (21), and the preset operation member (2
First and second operation modes that can be distinguished for the operation of 1) are set, and the preset operation member according to the first operation mode is set.
In the operation of (21), the output from the service component output means (17) is switched to the output of the primary service component preset in the preset operation member (21), and the second
In the operation of the preset operation member (21) according to the operation mode, the output from the service component output means (17) is switched to the output of the secondary service component preset in the preset operation member (21). The digital broadcast receiver according to claim 3, wherein: 7. When automatically presetting primary and secondary service components belonging to the same service on the same preset operation member (21), first, the primary service component is assigned to each preset operation member (21). After presetting all the primary service components in the same ensemble to each preset operating member (21), the same service as the primary service component preset to each preset operating member (21) is performed. The digital broadcast receiver according to any one of claims 3 to 5, wherein a secondary service component belonging to the service is determined and preset to each of the preset operation members (21). .