JP2003037518A - Digital multiplex broadcast receiver and control method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cope with a service reconfiguration accurately which occurs in a currently selected ensemble in a DAB car radio 10 having a preset key capable of selecting a service by pressing a single button to reproduce the desired services after presetting. SOLUTION: When the service reconfiguration is detected from FIG 0/0, a service Sa after the service reconfiguration is checked based on the information of FIG 0/2. When Sa is not registered as a preset services Sb in a preset key, the keys are preset for the service added in the service reconfiguration.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to DAB (Digi).
The present invention relates to a receiving device for digital broadcasting such as tal audio broadcasting) and a control method thereof.

[0002]

2. Description of the Related Art In digital multiplex broadcasting such as DAB which is practically broadcasted in Europe, a plurality of services are grouped into one ensemble, and each ensemble is assigned a predetermined carrier frequency and transmitted from a transmitting station. Sent. For digital multiplexed broadcasting, multiplex reconfiguration of services (m
ultiplex re-configuratio
n), and multiple reconfiguration causes additions and deletions for services in the ensemble.

On the other hand, a digital multiplex broadcasting car radio is equipped with a plurality of preset keys. If the user presets a predetermined service in each preset key, the user can operate the preset key by one-touch operation. You can select a service and play it.

[0004]

In the conventional DAB car radio, if the service preset in the preset key disappears due to multiplex reconstruction, the service is not reproduced even if the user operates the preset key. There was a problem. It should be noted that Japanese Patent Laid-Open No. 2001-44867 discloses a receiving device for notifying that there is a program reconfiguration and displaying a program list after the program reconfiguration, but it has nothing to do with the preset key. is there.

SUMMARY OF THE INVENTION It is an object of the present invention to improve the convenience of a digital multiplexed broadcast receiving apparatus equipped with a preset operation member for presetting a service and a control method thereof by coping with service reconfiguration.

[0006]

According to the digital multiplexed broadcast receiver of the present invention, a preset operation member for receiving a broadcast signal in which a plurality of services are multiplexed and presetting a predetermined service is provided. By operating the preset operation member, the service preset in the preset operation member is selected and reproduced. The digital multiplexed broadcast receiving apparatus has the following. -Service reconfiguration detecting means for detecting service reconfiguration in the multiplexed broadcast signal-When service reconfiguration is detected, the service preset for the predetermined preset operation member is changed based on the service after service reconfiguration Preset service change means

In the present invention, a "service" is defined as a broadcast unit that a user can select so that the user can reproduce it on output means such as a speaker or a monitor. Although the names of services and service components are used in the DAB standard, the broadcasting unit in which the user can select reproduction in the output means is the service component in the DAB, and the service in the present invention is strictly the DAB. Service component, typically the primary service component (DAB
Since each service has only one primary service component and always has one audio primary service component, the service and the primary service component correspond to each other 1: 1. ) Corresponds to.

Digital multiplexed broadcasts include digital multiplexed broadcasts of radio, television, and / or data. The digital multiplex broadcast receiving apparatus includes not only a radio digital multiplex broadcast receiving apparatus but also a television digital multiplex broadcast receiving apparatus. The digital multiplex broadcast receiving device particularly includes a digital multiplex broadcast car radio. When service reconfiguration is detected, for example, change, addition, and / or the setting of the service performed based on the service after the service reconfiguration for a predetermined preset operation member.
Or there is deletion. That is, when a service is added due to service reconfiguration, (a) the additional preset operating member may be preset to a preset operating member for which no service has been preset.
(B) The preset operation member may be preset with a preset service, but after the service is reconfigured, the preset operation member with the service disappeared may be preset. (C) The preset operation member may be preset. Service is preset, and a predetermined preset operation member is selected from preset operation members in which the service is present even after the service is reconfigured, and the additional service is preset to the selected preset operation member. like,
The preset service for changing the existing service to the additional service may be changed.

According to the digital multiplexed broadcast receiving apparatus of the present invention, a broadcast signal obtained by multiplexing a plurality of services is received,
A preset operation member for presetting a predetermined service is provided, and a service preset in the preset operation member is selected and reproduced by a user operating the preset operation member. The digital multiplexed broadcast receiving device is proposed. -Service reconfiguration detecting means for detecting service reconfiguration in the multiplexed broadcast signal including the service being reproduced-When service reconfiguration is detected, the service multiplexed in the multiplexed broadcast signal after service reconfiguration is detected After the service is reconfigured, the preset operation member is missing in a preset operation member (hereinafter referred to as “service-missing preset operation member”) that is missing in the multiplexed broadcast signal after the service is reconfigured. Preset service changing means for presetting the service included in the multiplexed broadcast signal

According to the digital multiplexed broadcast receiving apparatus of the predetermined mode, the preset service changing means (a), when there is an added service in the multiplexed broadcast signal after the service reconstruction, adds the added service. , Preset to the operation member for service missing preset, and (b)
When there is no added service in the multiplexed broadcast signal after the service reconfiguration, the service included in the multiplexed broadcast signal different from the multiplexed broadcast signal is preset in the service lack preset operation member. Further, the preset service changing means presets a service of another multiplexed broadcast signal on the service missing preset operation member, and when another multiplexed broadcast signal has a service having the same ID as the missing service ID. , The service having the same ID is preferentially preset in the service lack preset operation member.

According to the control method of the digital multiplexed broadcast receiving apparatus of the present invention, a preset operation member for receiving a broadcast signal in which a plurality of services are multiplexed and presetting a predetermined service is provided, and the preset operation by the user is performed. A service preset in the preset operation member is selected and reproduced by operating the member. The control method of the digital multiplexed broadcast receiving apparatus has the following steps. -Service reconfiguration detecting step for detecting service reconfiguration in the multiplexed broadcast signal-When service reconfiguration is detected, the preset service for a predetermined preset operation member is changed based on the service after service reconfiguration Preset service change step

According to the control method of the digital multiplexed broadcast receiving apparatus of the present invention, the preset operation member for receiving the broadcast signal in which a plurality of services are multiplexed and presetting a predetermined service is provided, and the preset operation by the user is performed. A service preset in the preset operation member is selected and reproduced by operating the member. The control method of the digital multiplexed broadcast receiving apparatus has the following steps.・ Service reconfiguration detection step to detect service reconfiguration in the multiplexed broadcast signal including the service being reproduced ・ When service reconfiguration is detected, the service multiplexed in the multiplexed broadcast signal after service reconfiguration is detected The service detection step to be performed: • After the service is reconfigured, the preset service is missing in the preset operation member that is missing in the multiplexed broadcast signal after the service reconfiguration (hereinafter referred to as “service missing preset operation member”). Preset service change step for presetting the service included in the multiplexed broadcast signal of

According to the control method of the digital multiplexed broadcast receiving apparatus of the predetermined mode, in the preset service changing step, if there is a service added in the multiplexed broadcast signal after the service reconfiguration, the added service is added. ,
Preset to the operation member for service missing preset.
Further, in the preset service changing step, when there is no added service in the multiplexed broadcast signal after the service reconfiguration, the service included in the multiplexed broadcast signal different from the multiplexed broadcast signal is operated as a service missing preset operation. Preset to parts. Furthermore, in the preset service changing step, when presetting a service of another multiplexed broadcast signal to the operation member for service-missing preset,
In another multiplexed broadcast signal, the same I as the missing service ID
When there is a service of D, the service of the same ID is preferentially preset in the service missing preset operation member.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the structure of a DAB transmission frame. It should be noted that FIGS. 1 to 6 are known standard diagrams of DAB, and for details, refer to the standard of DAB. The transmission frame (Transmission frame) is a synchronization channel (Synchroniati) in order from the front.
on Channel), FIC (Fast Info)
direction Channel: First Information Channel), and MSC (Main Se)
rvice Channel (main service channel). The FIC further includes a plurality of FIBs (F
ast Information Block), and the MSC is further composed of a plurality of CIFs (CommonIn).
terrained Frame). DAB
Has specifications determined from mode 1 to mode 4, and the transmission frame time (durati
on) and the number of FIBs and CIFs in one transmission frame are different. For example, in mode 1, the time for one transmission frame is 96 ms, and FIB and CI within one transmission frame are set.
The numbers of F are 12 and 4, respectively.

FIG. 2 is an exemplary diagram of a DAB service structure. The user listens to each service by selecting the service. A plurality of services (Services) can be accessed by one ensemble, and each service has one or more service components (Service components). The main service component of each service component is called a primary service component, and each service has one primary service component. The primary service component is usually a program service component as audio, but may be a data service component. Ensemble label (ensemble name) is DAB Ensemble 1 (DAB
The ENSEMBLE ONE ensemble has a service label of Alpha 1 Radio (ALPHA1 RA).
It includes a plurality of services such as DIO), beta radio (BETARADIO), and alpha 2 radio (ALPHA2 RADIO).

The Alpha 1 radio is a primary (pri)
service component (service comp)
one onts, secondary (secondary)
It has two service components of y). The primary service component is audio (Audio), and the secondary service component is a traffic message channel: TMC (Traffic Message Ch).
and service information: SI (Service)
Information). Audio and service information is transmitted on a subchannel (SubCh) in the MSC, and the TMC is a FIDC (Fast I) in the FIC.
information data channel).

Beta radio has two service components.
Audio and secondary audio (secondary a
data), both of which can include data in a subchannel of the MSC.

The alpha 2 radio has one audio as a primary component and TMC as a secondary component.
And SI. The TMC and SI of the alpha 2 radio are the same as the TMC and SI of the alpha 1 radio. The audio of the alpha 2 radio can be switched to two audios, and one audio is the same as the audio of the alpha 1 radio. When the audio is switched in the alpha 2 radio, the information of multiple reconstruction is transmitted.

FIG. 3 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 (Endmarker), 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 area).
Id). Each FIG. Is, in order from the front, FIG type, Length (length: represents the bit length of the subsequent FIG data area), and FIG data area (FIG.
data field). Fig type and Le
ngth constitutes the FIG header.

FIG. 4 is a structural diagram of the FIG data area of FIG. 3 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. Extens
Ion is 6, 9, 11, 18, 21, 21, 23, 2
In the case of 4, 25, 27 and 30, C / N indicates the version number of the type 0 area. OE is Extension
= 12,16,17,21,24,30, OE = 0 means that the information of this type 0 area is related to this ensemble, and OE = 1 is related to another ensemble. It means that it is a thing. P / D =
0 means that the SId (service Id) of the type 0 area is a 16-bit SId used for the program service component, and P / D = 1 means that the SId of the type 0 area is SId.
Is the 32-bit SId used for the data service component
Means that. This P / D is Extensio
Used when n is 2, 9, 23, 24, SId is in 16-bit format when not used.

FIG. 5 is a structural diagram of the FIG0 / 0 region. In addition, the FIG type and Extensio of each FIG.
Let n and n be represented in the form of FIG type / Extension. Fig0 / 0 is the Fig type = 0,
And it means that Extension = 0. FIG0 / 0
The 1st and 2nd fields of the are a 16-bit ensemble Id (EId) and a 2-bit change flag (Change flag), respectively. The change flag has two bits b15 and b14, and b15 is "
When it is 1 ”, it indicates that the service has been reconfigured, and when b16 is“ 1 ”, it indicates that the MSC subchannel has been reconfigured. It is appropriately called "service reconfiguration". By monitoring the change flag, it is possible to detect whether service reconfiguration has occurred in the ensemble related to EId.

FIG. 6 is a structural diagram of the FIG0 / 2 area. FIG0 / 2 is an ensemble service organization (s
service organization),
All services included in the ensemble can be examined by examining the SId of FIG0 / 2.

FIG. 7 is a block diagram of the DAB car radio 10. The RF unit 11 selects a radio wave having a frequency designated by the CPU 13 from the radio waves entering the antenna 12, detects the amplified radio wave, and outputs an amplified analog signal to the demodulation unit 14. The demodulation unit 14 converts the analog signal from the RF unit 11 into a digital signal and further performs processing such as high-speed Fourier conversion, IQ demodulation, and DQPSK demodulation.
Data of the DAB transmission frame of No. 1 is generated and output to the channel decoder 15. Channel decoder 1
Reference numeral 5 includes a circuit for deinterleaving and error correction processing, and FIC and M from the transmission frame data from the demodulation unit 14
SC and the FIC data of FIG.
MS which is output to the CPU and instructed by the CPU 13
The audio decoder 16 converts the data of the C sub-channel.
Output to. The audio decoder 16 expands the audio data from the channel decoder 15 in accordance with MPEG, converts the audio data from digital to analog, and outputs it to the speaker 17. The CPU 13 receives an instruction corresponding to a user operation on the operation unit 18 from the user, and outputs data and a control signal to the display unit 19 so that predetermined information is displayed on the display unit 19. The operation unit 18 includes a plurality of preset keys, and the user can preset a desired service in each preset key. The user is aware that the service is preset in each preset key, but in reality, it is not the service itself but the primary service component of the service corresponding to the service 1: 1 (the primary service component is This is audio.) Is preset.

8 and 9 are flowcharts of the preset key setting change routine executed when multiple reconstruction occurs. In S30, it is determined whether or not the service reconfiguration has occurred based on the information of FIG0 / 0. If the determination is YES, the process proceeds to S31, and if NO, the routine ends. As described in FIG. 6, when service reconfiguration occurs in the selected ensemble, FIG.
The change flag b15 of 0/0 becomes "1". In S31, the service preset in the preset key (hereinafter, the service preset in the preset key is referred to as "service b". Note that b is taken from before b before the service reconfiguration). ) Is detected. In S32, the service included in the ensemble after the service reconfiguration (hereinafter, the service included in the ensemble after the service reconfiguration is referred to as “service a”: where a is aft after the service reconfiguration).
Taken from a of er. ) Is detected based on FIG0 / 2. In S33, all Sa and all Sb are compared. In S34, it is determined whether or not there is a Sb which is not included in Sa (hereinafter, referred to as “missing Sb”). If the determination is YES, the process proceeds to S35 and NO. If so, the routine ends. That is,
If there is no missing Sb, it is not necessary to change the service preset in the preset key, so the routine is ended.
Even if the user operates the preset key preset for b (hereinafter, appropriately referred to as “missing preset key”), the service is not output from the speaker 17.
Therefore, it is necessary to change the setting of the preset service in the preset key, and the processing from S35 is performed. In S35, it is determined whether or not there is a service added to the ensemble after the service reconfiguration,
If the determination is YES, the process proceeds to S36, and if the determination is NO, the process proceeds to S41. In S36, additional Sa is preset in the missing preset key, and the routine ends.
In this way, it is possible to prevent the situation where the service is not output from 17 even if the user operates it.

If there are a plurality of missing preset keys, a separate additional Sa is preset for each missing preset key. If the number of missing preset keys> the number of additional Sa, in S36, separate additional Sa are preset in the missing preset keys for the number of additional Sa, and then the routine proceeds to S41 without ending the routine. The remaining missing preset keys are subjected to the processing from S41.

In S41 of FIG. 10, ensemble seek is performed. In S42, as a result of the ensemble seek in S41, it is determined whether or not there is another ensemble. Then, if the determination is YES, the process proceeds to S43, N
If it is O, the routine ends. In S43, it is determined whether or not there is the same service as the missing Sb in another ensemble. A unique service ID is assigned to each service regardless of the ensemble.
Can be checked to see if there are identical services between different ensembles. If the determination in S43 is YES, the process proceeds to S44, and the same service of the other ensemble is preset in the missing preset key, and if NO, the process proceeds to S45 and an appropriate service of the other ensemble. To the missing preset key. As a result, it is possible to prevent a situation in which audio is not output from the speaker 17 even if the user operates a predetermined preset key.

[0027]

According to the present invention, with the occurrence of service reconfiguration in digital multiplex broadcasting, the service preset in the preset operation member can be appropriately changed based on the service after multiple reconfiguration.

[Brief description of drawings]

FIG. 1 is a diagram showing a structure of a DAB transmission frame.

FIG. 2 is an exemplary diagram of a service structure of DAB.

FIG. 3 is a structural diagram of FIB.

FIG. 4 is a structural diagram of an FIG data area of FIG.

FIG. 5 is a structural diagram of a FIG 0/0 region.

FIG. 6 is a structural diagram of a FIG 0/2 region.

FIG. 7 is a configuration diagram of a DAB car radio 10.

FIG. 8 is a first part of a flowchart of a preset key setting change routine that is executed when multiple reconstruction occurs.

FIG. 9 is a second part of a flowchart of a preset key setting change routine executed when multiple reconstruction occurs.

[Explanation of symbols]

10 DAB Car Radio 13 CPU 18 Operation part

Claims (10)

[Claims] 1. A preset operation member for receiving a broadcast signal in which a plurality of services are multiplexed and presetting a predetermined service, wherein the preset operation member is preset by a user operating the preset operation member. In a digital multiplex broadcast receiving apparatus in which a service is selected and reproduced, a service reconfiguration detecting means for detecting a service reconfiguration in a multiplexed broadcast signal, and a predetermined preset when the service reconfiguration is detected. And a preset service changing means for changing a service preset for the operating member based on the service after the service is reconfigured. 2. A preset operation member for receiving a broadcast signal in which a plurality of services are multiplexed and presetting a predetermined service, wherein the preset operation member is preset by an operation of the preset operation member by a user. In a digital multiplex broadcast receiving apparatus in which a service is selected and played, a service reconfiguration detecting means for detecting service reconfiguration in a multiplexed broadcast signal including a service being played, and service reconfiguration are detected. In this case, service detecting means for detecting a service multiplexed in the multiplexed broadcast signal after the service reconfiguration, and a preset operation member in which the preset service is missing in the multiplexed broadcast signal after the service reconfiguration (Hereinafter, referred to as “service missing preset operation member”.) Digital multiplexer broadcast receiving apparatus characterized in that it has preset service change means, a presetting service included in the multiplexed broadcasting signal after configuration. 3. The preset service changing means presets the added service to a service missing preset operation member when there is a service added in the multiplexed broadcast signal after the service reconfiguration. The digital multiplexed broadcast receiving apparatus according to claim 2. 4. The preset service changing means, when there is no added service in the multiplexed broadcast signal after the service reconfiguration, services the service included in the multiplexed broadcast signal different from the multiplexed broadcast signal. 3. A missing member presetting operation member is preset.
Alternatively, the digital multiplexed broadcast receiving device according to the above item 3. 5. The preset service changing means, when presetting a service of another multiplexed broadcast signal on a service missing preset operation member, a service of the same ID as the missing service ID in another multiplexed broadcast signal. 5. The digital multiplex broadcast receiving apparatus according to claim 4, wherein when there is such a service, the service having the same ID is preferentially preset in the service lack preset operation member. 6. A preset operation member for receiving a broadcast signal in which a plurality of services are multiplexed and presetting a predetermined service is provided, and the preset operation member is preset by an operation of the preset operation member by a user. In a method of controlling a digital multiplex broadcast receiving apparatus in which a service is selected and reproduced, a service reconfiguration detecting step of detecting service reconfiguration in a multiplexed broadcast signal, and when the service reconfiguration is detected, A preset service changing step for changing a service preset for a predetermined preset operation member based on the service after the service reconfiguration,
A method for controlling a digital multiplex broadcast receiver, comprising: 7. A preset operation member for receiving a broadcast signal in which a plurality of services are multiplexed and presetting a predetermined service is provided, and the preset operation member is preset by an operation of the preset operation member by a user. In a method of controlling a digital multiplex broadcast receiving apparatus in which a service is selected and played back, a service reconfiguration detection step for detecting service reconfiguration in a multiplexed broadcast signal including a service being played back, service reconfiguration When a service is detected, a service detection step of detecting a service multiplexed in the multiplexed broadcast signal after the service reconfiguration, and a preset in which the preset service is missing in the multiplexed broadcast signal after the service reconfiguration Operation member (hereinafter referred to as "service missing preset operation member") . In), the control method for a digital multiplexer broadcast receiving apparatus characterized in that it has a preset service change step, to preset the service included in the multiplexed broadcasting signal after service reconfiguration. 8. The preset service changing step, if there is a service added in the multiplexed broadcast signal after the service reconfiguration, adds the added service,
The method for controlling a digital multiplex broadcast receiving apparatus according to claim 7, wherein presetting is performed on an operation member for presetting a service lack. 9. In the preset service changing step, when there is no added service in the multiplexed broadcast signal after the service reconfiguration, a service included in a multiplexed broadcast signal different from the multiplexed broadcast signal is serviced. 9. The method for controlling a digital multiplex broadcast receiving apparatus according to claim 7, wherein the missing preset operation member is preset. 10. In the preset service changing step, when a service of another multiplexed broadcast signal is preset in the service missing preset operation member, a service having the same ID as the missing service ID is added to another multiplexed broadcast signal. 10. The control method of the digital multiplex broadcast receiving apparatus according to claim 9, wherein if there is any, the service having the same ID is preferentially preset in the service missing preset operation member.