JPH11312992A - Digital broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To preferentially receive a component which has language information of which the reception is desired by discriminating whether the component having the previously designated language information exists in a service or not and selecting the prescribed component based on the discrimination result. SOLUTION: When language information and a language filter mode to which a user gives priority are set on, a leading service in the order of a service id which is an audio service in an ensemble is retrieved. Then, it is discriminated whether the language information of a component set in the primary in this retrieved service coincides with a designated language or not and if they coincide, this component is selected and is outputted with a voice through a speaker. On the other hand, if they don't coincide, it is discriminated whether the language information of the next component (secondary) in this service coincides with the designated language or not.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcast receiver, and more particularly to a digital audio broadcast receiver which is already in practical use in Europe.
ng; hereinafter, referred to as DAB).

[0002]

2. Description of the Related Art As a system for transmitting and receiving a broadcast wave having a data signal of a predetermined format including a digital audio signal, a European standard (Eureka 14) is used.
There is a DAB system conforming to 7). In such a system, one ensemble is composed of a plurality of services, and each service is composed of a plurality of components such as English and German. Therefore, the user can obtain information on a plurality of services and components by selecting a certain ensemble, and can instantaneously switch to different services and components.

[0003]

In DAB broadcasting, information indicating in which language each component is broadcast is transmitted.
Such information is a type 0 field 5 (Type 0 field for exten
The data is transmitted in a format called sion 5), and using this information to determine a component to be selected from a plurality of components is considered as one of the uses of the DAB receiver.

Accordingly, it is an object of the present invention to provide a digital broadcast receiver capable of receiving components having language information desired by a user with priority.

[0005]

According to the first aspect of the present invention, there is provided a digital signal transmitting language information indicating the type of language used in each component constituting a service together with voice information of each component as a digital signal. A digital broadcast receiver that receives an audio broadcast, and when selecting a service, determines whether a component having language information specified in advance exists in the service, based on at least the determination result. And selecting a predetermined component.

According to the second aspect of the present invention, in the digital broadcast receiver according to the first aspect, when it is determined that the component having the predetermined language information does not exist in the service, And selecting a component defined as primary in the service.

According to the third aspect of the present invention, in the digital broadcast receiver according to the first aspect, when it is determined that the component having the predetermined language information is present in the service, A component having the language information specified in advance is selected.

According to the present invention, the ensemble is composed of a plurality of services, and linguistic information indicating the type of language used in each component constituting the plurality of services is included together with audio information of each of the components. A digital broadcast receiver for receiving a digital audio broadcast transmitted as a digital signal, and when selecting an ensemble, determines whether a component having language information specified in advance is present in the ensemble,
A predetermined component is selected based on at least the determination result.

According to a fifth aspect of the present invention, in the digital broadcast receiver according to the fourth aspect, the component having the language information specified in advance is not present in one of the services in the ensemble. When it is determined, it is determined whether or not a component having the language information specified in advance exists in another service in the ensemble.

According to a sixth aspect of the present invention, in the digital broadcast receiver according to the fourth aspect, the component having the language information specified in advance does not exist in any of the services in the ensemble. If it is determined that a component defined as a primary in any of the services in the ensemble is selected.

According to a seventh aspect of the present invention, in the digital broadcast receiver according to the fourth aspect, when it is determined that the component having the predetermined language information is present in the ensemble, A component having the language information specified in advance is selected.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 7 is a block diagram of a DAB receiver according to one embodiment of the present invention. The DAB receiver includes a DAB receiving unit 1, a DAB control unit 2, a system control unit 3, a display unit 4, a key input unit 5, an amplifier 6,
And a speaker 7.

The DAB receiving section 1 transmits the transmitted OFDM
It includes an FFT (Fast Fourier Transform) unit for demodulating waves, a Viterbi decoding unit for error correction, and an audio decoder for restoring compressed audio data to original audio data. And is not described in detail here.

The DAB control unit 2 controls the DAB receiving unit 1 and also controls the FIC demodulated by the DAB receiving unit 1.
(Fast Information Channel: high-speed information channel) is read. Such information includes:
Language information and program content identification information (PTy
Information).

The DAB control unit 2 further transmits necessary information to the system control unit 3 in response to a request from the system control unit 3.

Further, the system control unit 3 controls the entire receiver. Specifically, corresponding control is performed based on input information from key input unit 5. For example, amplifier 6
This corresponds to control of the sound volume, up / down of the frequency, and setting of a language filter described later. The system control unit 3 controls the display unit 4 and outputs display information to the display unit 4. The above is the outline of the DAB receiver.

First embodiment. Next, the operation of the system control unit 3 according to the present invention will be described in detail. FIG. 1 shows a system control unit 3 in the ensemble search of the present invention.
6 is a flowchart showing the operation of the first embodiment. This flowchart is executed when an ensemble search is designated from the key input unit 5.

At the time of normal reception (step S1), when an ensemble search is set by the user from the key input unit 5, the system control unit 3 proceeds to step S2 and returns to D
It instructs the AB control unit 2 to select another receivable ensemble. The DAB control unit 2 receiving this instruction changes the reception frequency to control the DAB reception unit 1 and select a receivable ensemble. When detecting the receivable ensemble, the DAB control unit 2 extracts information on each component constituting the ensemble and transmits the information to the system control unit 3.

Next, the system control unit 3 determines whether or not a language filter mode in which linguistic information is added to component selection conditions is set (step S3). Specifically, language information and information indicating whether or not the user turns on the language filter mode are input from the key input unit 5 and the system control unit 3 determines whether the input has been made. Thereby, the priority language information and the ON / OFF of the language filter mode are determined.

If the language filter mode is set to ON, in step S6 the audio service in the selected ensemble and the service Id
The first service is searched in the order of (SId).

Next, the process proceeds to step S7a, and it is determined whether or not the language information of the component set as the primary in the searched service matches the specified language.

If the linguistic information matches, the component is selected in step 8 and a sound is output via the speaker 7. On the other hand, if the language information does not match, it is determined whether the language information of the next component (secondary) of the service matches the specified language (step S7b).

When such processing is performed for each component, and it is determined that the language information does not match the specified language even for the component immediately before the primary of the service (step S7n), the processing in the service is performed. Assuming that the component of the specified language cannot be selected, the next service is searched in the order of service Id (SId) for the audio service in the selected ensemble (step S9), and steps S7a to S7n are similarly performed for the service. Is carried out.

The above steps S7a to S7
n, the loop of step 9 compares the linguistic information of each component in a certain ensemble with the specified linguistic information, and if there is a matching component, this is reproduced.

Therefore, even when the ensemble is changed, it is possible to preferentially provide components of a desired language to the user.

If it is determined in step S9 that a component having the corresponding linguistic information is not found even after searching for the last service, in step S10 the head audio service of the ensemble is selected,
The primary voice of the service is output from the speaker 7 (step S11).

On the other hand, if it is determined in step S3 that the language filter mode in which the linguistic information is added to the component selection condition is not set, the process proceeds to step S4, where the audio service in the selected ensemble is used. Then, the first service is searched in the order of service Id (SId), and the sound of the component set as the primary in the service is reproduced (step S5).

FIG. 2 is a diagram showing a state of a search by the ensemble search process shown in FIG. In FIG. 2, there is one ensemble in the frequency band before and after the ensemble being received (secondary component in service 1 of ensemble 2), each ensemble has two audio services, and each service has two audio services. It is described as having three components. FIG. 2A shows a state of the search when the language filter mode is not set, and FIG. 2B shows a state of the search when the language filter mode is set.

When the language filter mode is not set, as shown in FIG. 2A, the ensemble (ensemble 1 or 3) before (or after) the current ensemble.
Is selected, the component set as the primary among the components constituting the service is selected, and the sound is output.

On the other hand, when the language filter mode is set, as shown in FIG. 2B, first, the service 1 of the ensemble (ensemble 1 or 3) before (or after) the current ensemble is selected, It is determined whether the language information of each component constituting the service matches the designated language information. If they match, the component is played.

If the specified language information component does not exist in service 1, the next service (ensemble 1
Alternatively, the service 2) of 3 is selected, and similarly, it is determined whether or not the language information of each component constituting the service matches the designated language information. If the component of the specified language information does not exist in the service 2, it means that the component having the specified language information does not exist in the ensemble. Therefore, the primary of the audio service (service 1) at the head of the ensemble is selected and reproduced. Then, the search process ends.

Second Embodiment In the first embodiment, the ensemble change processing has been described. However, the use of linguistic information is not limited to this, and can be used in the service change processing. The second embodiment below shows an example in which language information is used for service switching. This flowchart is executed when service switching is designated from the key input unit 5.

At the time of normal reception (step S11), when service switching is set by the user from the key input unit 5, the system control unit 3 proceeds to step S12 and adds language information to the component selection conditions. It is determined whether the language filter mode has been set (step S12). Specifically, as in the first embodiment, language information that the user prefers and information indicating whether to turn on the language filter mode are input from the key input unit 5, and the system control unit 3 receives the input. By the determination, the priority language information and ON / OFF of the language filter mode are determined.

If the language filter mode is set to ON, the process goes to step S15 to search for an audio service next to the selected service.

Next, in step S16a, it is determined whether or not the language information of the component set as the primary in the searched service matches the specified language.

If the linguistic information matches, step S17
, The component is selected, and a sound is output via the speaker 7. On the other hand, if the language information does not match, the next component of the service (secondary)
It is determined whether or not the language information matches the specified language (step S16b).

The same processing is performed for each component, and when it is determined that the component immediately before the primary of the service does not match (step S1).
6n) determines that the component of the specified language in the service cannot be selected, and reproduces the sound of the component set as the primary of the selected audio service (step S18).

The above steps S16a to S1
6n, the linguistic information of each component in a certain service is compared with the specified linguistic information, and if there is a matching component, this is reproduced. Therefore, even at the time of service switching, it is possible to preferentially provide components of a desired language to the user.

On the other hand, if it is determined in step S12 that the language filter mode in which the linguistic information is added to the component selection conditions is not set, the process proceeds to steps S13 and S14, where the primary filter in the next audio service is set. Select and play the component set to.

FIG. 4 is a diagram showing a state of the search by the service switching process shown in FIG. In FIG. 4, it is assumed that there is one audio service before and after the selected service (secondary component in the service 2), and that each service has three components. FIG. 4A shows a state of the search when the language filter mode is not set.
(B) shows a state of the search when the language filter mode is set.

If the language filter mode is not set, the service (service 1 or 3) before (or after) the current service is selected as shown in FIG. The component set as primary in is played.

On the other hand, when the language filter mode is set, the service (service 1 or 3) before (or after) the current service is selected as shown in FIG. It is determined whether the language information of the component matches the specified language information. If they match, the component is played. If there is no component having the specified linguistic information in the services 1 and 3, there is no component having the specified linguistic information in the service. Therefore, the primary is selected and reproduced, and the search process is terminated.

Third Embodiment Next, a third embodiment according to the present invention will be described. In this example, the above-described language filter function is applied to a PTY search. The PTY search is a function in which a user specifies desired program contents and attempts to reproduce the program contents with priority, and is a function that has been put to practical use in RDS and the like. DAB
Then, the transmission format type 0 17 (extension1
The PTY (Program Type) of each service is encoded in 7 of type 0), and a PTY search can be performed by using this information. Note that this flowchart is also executed when the PTY search is designated from the key input unit 5.

FIG. 5 is a diagram showing the state transition of the PTY search. Here, a case where the PTY search key is set to ON while a certain service is selected will be described as an example.

When the PTY search key is pressed, as shown in step S32a, the P in the next service of the current service is set.
First, it is searched whether or not the TY matches the designated PTY.
If the PTY matches, the service is selected in step S40.

If it is determined in step S32a that the PTYs do not match, the same applies to the next service.
Y is compared (step 32b). If the PTY matches, the service is selected in step S40 as described above.

The same processing is repeated, and the last service (the service selected at the start of the PTY search)
If it is determined that the designated PTY is not found even if the search has proceeded to the service immediately before (step S32n),
Since there is no selectable service in the current ensemble, the DAB control unit 2 is instructed to change the frequency so as to search for the next ensemble. The DAB control unit 2 receives the command and controls the DAB receiving unit 1 so as to receive the next ensemble, and obtains from the FIC information on the next ensemble determined to be receivable through the channel selection processing. Is transmitted to the system control unit 3.

Next, it is determined whether or not the order of SId (Service Identifier) in the obtained information of the next ensemble matches the designated PTY for the first service (step S34a). If the PTY matches, the service is selected in step S40.

If it is determined in step S34a that the PTYs do not match, the same applies to the next service.
Y is compared (step S32b). If the PTY matches, the service is selected in step S40 as described above. The specified PTY is not found even if the search has proceeded to the service immediately before the last service (in this case, the service with the first order of SId) (step S32).
n; none), the same process is performed for the next ensemble.

Even if the entire receiving band is searched, the desired PTY
Is not obtained, an "error display" indicating this is displayed on the display unit 4 (step S35), and control is performed so as to select the last service (the service selected at the start of the PTY search) (step S35). S36).

At this time, if the last service still exists, the last component of the last service (P
At the start of the TY search, it is determined whether or not the selected component is present.

If there is a last component, the component is selectively reproduced (step S39). On the other hand, if there is no last component, a primary component is selected and reproduced (step S).
38).

This is because the end of the primary component means the end of the service, but the end of the secondary component does not necessarily mean the end of the service.
Plays the primary component.

Next, the language filter mode will be described. When the language filter mode is set to ON (step S41; ON), step S41 is executed.
At 43a, it is determined whether the language information of the component set as the primary in the selected service matches the specified language.

If the language information matches, step S44
, The component is selected, and a sound is output via the speaker 7. On the other hand, if the language information does not match, it is determined whether the language information of the next component (secondary) of the service matches the specified language (step S43b).

The same processing is performed for each component, and when it is determined that the component immediately before the primary of the service does not match (step S43).
n; none), it is determined that the component of the designated language cannot be selected in the audio service selected in step S40, and the component set as the primary is selected and reproduced (step S38).

The above steps S43a to S4
By 3n, the language information of each component in a certain service is compared with the designated language information, and if there is a matching component, this is reproduced. Therefore, at the time of the PTY search, it is possible to preferentially provide components of a desired language to the user.

On the other hand, if it is determined in step S41 that the language filter mode in which the linguistic information is added to the component selection condition is not set, the process proceeds to step S42, where the language filter mode is set as the primary in the audio service. And play the selected component.

FIG. 6 is a diagram showing a search flow of the PTY search process shown in FIG. In FIG. 6, the language filter is set to off, and there are two receivable ensembles in the reception band (each having three services). Currently, the secondary component in the service 2 of the ensemble 1 is reproduced. It is explained as being.

When the PTY search starts, first, it is searched whether or not the service next to the current service (service 3 in ensemble 1) matches the designated PTY.
If Y matches, the primary component is played.

If the specified PTY is not found even if the search proceeds to the service (service 1 in the ensemble 1) immediately before the last service (the service 2 in the ensemble 1), the DAB control unit 2 searches the next ensemble for the frequency. To change

Next, it is determined whether or not the order of SId in the information of the selected next ensemble (ensemble 2) matches the designated PTY for the first service (service 1). If the PTY matches, the sound of the component set as primary is played.

If it is determined that the PTY does not match,
The PTY is similarly compared for the next service, and the specified PTY is not found even if the search progresses to the service immediately before the last service (service 1 during search for a different ensemble) (service 3 in ensemble 2). In this case, since the entire reception band has been searched, an error display is displayed on the display unit 4, and the last service (secondary service of the service 2 of the ensemble 1) is selectively reproduced.

[0064]

As described above, according to the present invention,
It is possible to preferentially receive components having language information that the user desires to receive.

[Brief description of the drawings]

FIG. 1 is a flowchart for executing an ensemble search according to the present invention.

FIG. 2 is a diagram illustrating a search order of an ensemble search according to the present invention.

FIG. 3 is a flowchart for executing a service switching process of the present invention.

FIG. 4 is a diagram illustrating a search order of a service switching process according to the present invention.

FIG. 5 is a flowchart for executing a PTY search according to the present invention.

FIG. 6 is a diagram showing a search order of a PTY search of the present invention.

FIG. 7 is a block diagram of a DAB receiver.

[Explanation of symbols]

 1 DAB receiving unit 2 DAB control unit 3 System control unit 4 Display unit 5 Key input unit 6 AMP 7 Speaker

Claims (7)

[Claims] 1. A digital broadcast receiver for receiving a digital audio broadcast in which language information indicating a type of language used in each component constituting a service is transmitted together with audio information of each component as a digital signal. When selecting a digital broadcast, it is determined whether a component having language information specified in advance is present in the service, and a predetermined component is selected based on at least the determination result. Receiving machine. 2. If the component having the language information specified in advance is not present in the service, a component specified as primary in the service is selected. 1
Digital broadcast receiver as described. 3. The method according to claim 2, wherein when it is determined that the component having the predetermined language information exists in the service, the component having the predetermined language information is selected. 2. The digital broadcast receiver according to 1. 4. A digital audio broadcast in which an ensemble is composed of a plurality of services, and language information indicating the type of language used in each component constituting the plurality of services is transmitted as a digital signal together with audio information of each component. A digital broadcast receiver for receiving an ensemble, when selecting an ensemble, determines whether a component having language information specified in advance is present in the ensemble, and determines a predetermined A digital broadcast receiver characterized by selecting the following components: 5. When it is determined that the component having the language information specified in advance does not exist in one service in the ensemble, the component specified in the other service in the ensemble is specified. 5. The digital broadcast receiver according to claim 4, wherein it is determined whether a component having language information exists. 6. If it is determined that the component having the language information specified in advance does not exist in any of the services in the ensemble, the component is defined as primary in any of the services in the ensemble. 5. The digital broadcast receiver according to claim 4, wherein the selected component is selected. 7. When the component having the language information specified in advance is determined to be present in the ensemble, the component having the language information specified in advance is selected. 4. The digital broadcast receiver according to 4.