JP2000349669A - Broadcast signal receiver - Google Patents

Abstract

(57) [Summary] In receiving a digital audio broadcast signal, selection of audio program data or general program data based on the digital audio broadcast signal has a relatively large degree of freedom and a wider selection. It can be done in any way. A control unit (50) for controlling at least operations of a data reproducing unit (23) and a memory unit (43), and an input operation unit (42) for inputting a keyword to the operation control unit (50) are provided. An operation of storing character information data included in control information data obtained from the data reproducing unit 23 and character information data included in selected program data obtained from the data reproducing unit 23 in the memory unit 43, and an input operation When a keyword is input from the section 42, the input keyword is checked against the character information data stored in the memory section 43, and based on the result, the program selecting section 29 is executed.
Controls the selection of program data according to.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The invention described in the claims of the present application receives a broadcast signal (digital audio broadcast signal) under digital audio broadcast (DAB),
The present invention relates to a broadcast signal receiving apparatus that reproduces program data and control information data selected from a received digital audio broadcast signal and obtains a reproduced audio signal based on the reproduced program data.

[0002]

2. Description of the Related Art Audio broadcasting, which is often referred to as "radio broadcasting", has been used for many years for AM audio broadcasting in which audio information signals are transmitted as amplitude-modulated (AM) audio signals, and audio information signals are frequency-modulated (FM). ) F to be transmitted as an audio signal
Digital audio broadcasting, which has been regarded as analog audio broadcasting such as M audio broadcasting, but in recent years, in order to improve the quality of audio information transmitted and received under the analog audio broadcasting, the audio information signal is transmitted as a digital audio signal. It has been proposed that Especially in Europe,
In part, digital audio broadcasting has been
gital Audio Broad-casting) has already been put to practical use.

A digital audio broadcast signal transmits not only audio information data forming a digital audio signal but also general information data containing, for example, weather forecast, traffic information, and the like as program information data. Further, the receiving side reproduces the audio information data and the general information data, and reproduces the control information data necessary for obtaining a digital audio signal based on the audio information data or general data based on the general information data. The audio information data is usually obtained as including a plurality of audio program data representing a plurality of audio programs, respectively. The general information data is also usually obtained as including a plurality of general program data representing a plurality of general programs, respectively.

[0004] The audio information data and general information data transmitted by the digital audio broadcast signal have been subjected to time interleave processing in order to minimize adverse effects due to data bit loss, data bit change, and the like occurring during transmission. It is assumed. The audio information data and the general information data are transmitted in a mode in which unit sections called logical frames having a time length of 24 ms (24 milliseconds) are consecutively connected, for example. Is, for example, 16 consecutive
The audio information data and general information data for 16 consecutive logical frames subjected to time interleaving processing are performed by using 16 logical frames as interleaved complete divisions. Is formed.

A digital audio broadcast signal transmitted in such a digital audio broadcast is received using a digital audio broadcast signal receiving device. In the digital audio broadcast signal receiving apparatus, a digital audio broadcast signal transmitted from each broadcasting station that performs digital audio broadcast is selectively received by a channel selection operation, and demodulation processing is performed on the received digital audio broadcast signal. As a result, audio information data and general information data subjected to the time interleave processing and control information data not subjected to the time interleave processing are obtained. Then, for the audio information data and the general information data subjected to the time interleaving processing, the time interleaving processing applied to the audio information data and the general information data is released, and the time information for the original audio information data and the general information data is obtained. Deinterleave processing is performed.

Then, under the control information data, time-interleaved audio information data and audio program data based on general information data and general program data are obtained separately, A digital audio signal is reproduced by performing a decoding process on the program data, and a reproduced audio signal is obtained based on the digital audio signal. A decoding process on the general program data is performed to obtain reproduced general data. Can be

The audio information data obtained from the digital audio broadcast signal received by the digital audio broadcast signal receiving apparatus usually includes a plurality of audio program data, and the general information data obtained from the received digital audio broadcast signal. Also usually includes a plurality of general program data. The control information data and the audio information data obtained from the received digital audio broadcast signal include a plurality of audio programs each represented by a plurality of audio program data included in the audio information data,
In addition, various types of character information data related to a plurality of general programs each represented by a plurality of general program data included in the general information data are included with a predetermined character number limit.

For example, the control information data includes service component label data representing a label (sign) for each of a plurality of voice programs or general programs, and a plurality of voice programs or a plurality of general programs. , And character information data such as ensemble label data representing an ensemble label including a plurality of voice programs or a plurality of general programs. Further, the audio information data includes character information data such as dynamic label data representing information related to each audio program.

[0009]

Under such circumstances, in a digital audio broadcast signal receiving apparatus, one of a plurality of audio program data included in audio information data obtained from a received digital audio broadcast signal is provided. The user selects one of the plurality of general program data included in the general information data obtained from the received digital audio broadcast signal. The selection of such audio program data or general program data is in accordance with the intention of the user of the device, but in that case, conventionally, the control information data obtained from the received digital audio broadcast signal includes Ensemble label data, service label data, and the like are used.

As described above, the selection of audio program data or general program data by the user of the apparatus, which is performed by using ensemble label data, service label data, and the like included in the control information data, is performed by selecting the selection. Lack of freedom in manner, so to speak
The range of choices will be narrow. Therefore, in the digital audio broadcast signal receiving apparatus, when selecting audio program data or general program data in accordance with the intention of the user of the apparatus, the user of the apparatus may be dissatisfied with the selection method. It is not uncommon to be imitated.

In view of the above, the invention described in the claims of the present application selectively receives a digital audio broadcast signal, and outputs audio information data, general information data, and control information from the received digital audio broadcast signal. Data and a reproduced audio signal based on a selected one of a plurality of audio program data included in the reproduced audio information data, or a plurality of general program data included in the reproduced general information data In obtaining general data based on the selected one of the above, it is possible to select voice program data or general program data with a relatively large degree of freedom and a wider selection method. Broadcast signal receiving apparatus.

[0012]

A broadcast signal receiving apparatus according to one of the first to fourth aspects of the present invention is a receiving section for selectively receiving a digital audio broadcast signal. And, includes a program selection unit for selecting the program data obtained based on the digital audio broadcast signal received by the receiving unit,
A data reproducing unit for reproducing the selected program data and control information data, an audio signal output unit for obtaining a reproduced audio signal based on the selected program data obtained from the data reproducing unit, and a control obtained from the data reproducing unit And a memory unit for storing character information data included in the application information data and character information data included in the selected program data obtained from the data reproduction unit, and at least operation control of the data reproduction unit and the memory unit. An operation control unit, comprising: an input operation unit capable of inputting a keyword to the operation control unit, wherein the operation control unit includes character information data and data included in control information data obtained from the data reproduction unit. An operation of storing character information data included in the selected program data obtained from the reproducing unit in the memory unit, In addition, when a keyword is input from the input operation unit, the matching of the input keyword is performed on the character information data stored in the memory unit, and based on the result of the matching, the program selection unit selects the program data. Is performed.

[0013] In the broadcast signal receiving apparatus according to any one of the first to fourth aspects of the present invention configured as described above, the data reproduction unit receives the broadcast signal. When the control information data and the program data selected by the program selection section are reproduced based on the digital audio broadcast signal received by the section, the operation control section includes the control information data included in the control information data obtained from the data reproduction section. The character information data included in the selected program data obtained from the data reproducing unit and the character information data included in the control information data. And character information data included in the selected program data. When a keyword is input from the input operation unit, the operation control unit executes a check on the character information data stored in the memory unit for the input keyword, and, based on the result of the check, a program selection unit. Controls the selection of program data according to.

In this case, the operation control unit may be, for example,
As in the case of the broadcast signal receiving apparatus according to the invention described in (1), as a result of collation of the keyword input from the input operation unit with the character information data stored in the memory unit, the character information data stored in the memory unit When a keyword that matches the keyword input is detected, the program selection unit is caused to perform an operation for selecting program data corresponding to the keyword.

According to the broadcast signal receiving apparatus according to any one of claims 1 to 4 in the claims of the present application, the user can use the apparatus according to his or her own intention. The selected program data can be selected by a keyword search method of inputting a keyword from the input operation unit. Therefore, the degree of freedom can be compared with the selection of program data such as voice program data and general program data. It can be done with a large and wide selection.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a broadcast signal receiving apparatus according to any one of the first to fourth aspects of the present invention. In this example, the digital audio broadcast signal transmitted from the broadcasting station and captured by the receiving antenna 21 is transmitted to the channel selection receiving unit 2.
2 is selectively received by the channel selection operation.

The digital audio broadcast signal selectively received by the channel selection receiving section 22 includes, for example, digital data in which an orthogonal frequency division multiplex modulation (Orthogonal Frequency Division) is used.
The signal is a modulated wave signal obtained by modulating by the onMultiplexing (OFDM) method, and the digital data is composed of a series of frame units called a transmission frame.

Each transmission frame has a time length of, for example, 96 ms, as shown in an example of FIG. 2A, and includes a portion of a synchronization channel, a portion of a fast information channel (FIC), and , The main service channel (MSC).

The MSC portion includes a plurality of common interleaved frames (C) as shown in FIG.
IF). Each CIF is
The whole consists of 55,296 bits, and a total of 864 capacity units (CU) from 0 to 863 are connected as shown in FIG. 2C. Each capacity unit is 64 bits of unit data. The MSC transmits the program information data, which is audio information data and general information data. The audio information data transmitted by the MSC includes a plurality of audio program data, and the general information data transmitted by the MSC includes a plurality of general program data.

Each of the plurality of audio program data included in the audio information data transmitted by the MSC forms a series of audio frames, and each audio frame has a total of 24 ms as shown in FIG. 3, for example. In this case, the data includes audio data and undefined-length program-related data X-PAD and fixed-length program-related data F-PAD provided in a portion following the audio data. Note that ScF-CRC in the audio frame shown in FIG.
Is an error detection word (not shown) for scale factor data included in an audio frame.

Further, as shown in FIG. 2B, the FIC portion is constituted by a series of a plurality of fast information blocks (FIBs). Each F
The IB consists of 256 bits, as shown in FIG. 2C, and includes an FIB data field and an error detection word CR.
C (Cyclic Redundancy Check). Further, as shown in FIG. 2D, each FIB data field is constituted by a series of a plurality of fast information groups (FIGs).
G indicates the FIG header and the FIG header as shown in FIG.
And data fields. Then, by such FIC, multiplex configuration information (Multi-plex Configur
ation Information: Control information data representing MCI) and other information is transmitted.

The data transmitted by the FIC and the MSC also include character information data representing character information related to the voice program and the general program, which represent the voice program data and the general program data transmitted by the MSC, respectively. ing. Such character information data is, for example, an ensemble label including a plurality of audio programs or general programs, that is, ensemble label data indicating an ensemble label, service label data indicating a service label which is a label of each audio program or a general program. , Service component label data representing a service component label which is a label for each audio program or general program portion,
Character information data such as dynamic label data representing a dynamic label, which is information related to each audio program.

FIG. 4 shows an ensemble label represented by the ensemble label data, a service label represented by the service label data, a service component label represented by the service component label data, and a dynamic label represented by the dynamic label data. As shown in the figure, the ensemble label has a top-level hierarchy.
The ensemble label data, service label data, and service component label data are F
The dynamic label data is transmitted by an IC, whereas the dynamic label data is transmitted as undefined length program-related data X-PAD in an audio frame formed by each of a plurality of audio program data included in the audio information data in the MSC.

The tuning receiver 22 performs an amplification process, a frequency conversion process, and the like on the digital audio broadcast signal selected and received, and generates an intermediate frequency (IF) signal SID for the digital audio broadcast signal selectively received. The IF signal SID is formed and supplied to the data reproducing unit 23.

In the data reproducing section 23, the IF signal SID from the tuning receiving section 22 is converted into an analog / digital (A
/ D) is supplied to the conversion unit 25, and the A / D conversion unit 25
A digital IF signal DID corresponding to the F signal SID is obtained and supplied to the quadrature demodulation unit 26. The quadrature demodulation unit 26 performs quadrature demodulation processing on the digital IF signal DID, thereby obtaining a quadrature demodulation output signal DQX.

The quadrature demodulation output signal DQX obtained from the quadrature demodulation unit 26 is supplied to a fast Fourier transform (FFT) differential demodulation unit 27. In the FFT differential demodulation unit 27,
The time domain signal of the quadrature demodulation output signal DQX is converted from a frequency domain signal into a frequency domain signal. From the FFT differential demodulation unit 27, control information data transmitted by the FIC in each transmission frame of the quadrature demodulation output signal DQX The composite data DCX formed by the program information data transmitted by the MSC is obtained. The composite data DCX obtained from the FFT differential demodulation unit 27 is subjected to a frequency deinterleaving process for canceling the frequency interleaving state in the frequency deinterleaving unit 28 to become composite data DCX ′, and then the program selection unit 29 Supplied to

The program selection section 29 is also supplied with a program selection control signal CPR from a control unit 50 forming an operation control section. Then, the program selection unit 29
In the above, the program information data, which is audio information data or general information data transmitted by the MSC forming the composite data DCX ', and the control information data transmitted by the FIC are separated, and the program selection control signal CPR In accordance with, a program selection for selecting one of a plurality of voice program data or a plurality of general program data included in the separated voice information data or the general information data is performed, and the selected program is selected. Selected program data DPD, which is audio program data or general program data, is obtained, and separated control information data is obtained as control information data DCD.

Thus, the selected program data DPD obtained in the program selecting section 29 is
It is assumed that time interleave processing has been performed. Such program data DPD corresponds to a common interleaved do frame (CIF), for example,
A logical frame having a time length of 24 ms is sequentially connected, and the time interleaving process performed on the logical frame is, for example, 16 consecutive logical frames.
The frame is performed as an interleaved completion section. Each logical frame is composed of 864 capacity units (CU) forming unit data.

Then, the program data DPD obtained from the program selector 29 is supplied to the time deinterleaver 30. The time deinterleave unit 30 performs a time deinterleave process on the program data DPD. In that case, for example, first,
Of the successive logical frames formed by the program data DPD, for each of the 16 consecutive sets forming each interleave completion section, a plurality of capacities in each of the 16 logical frames are set.
The units are sequentially connected to the time deinterleave unit 30.
It is written and stored in a memory built in the.

Subsequently, after all of the plurality of capacity units in each of the 16 logical frames are stored in the memory, the plurality of capacity units stored in the memory are read by a predetermined readout. The program data DPD ′ in 16 new logical frames that are read from the memory in a manner and successively connected
Are taken out to form As a result, the time deinterleaving section 30 obtains the selected audio program data or service program data which has been subjected to the time deinterleaving processing for canceling the time interleaving processing, and the selected program data DPD '. Is supplied to the Viterbi decoding unit 31.

On the other hand, the control information data DCD obtained from the program selecting section 29 is not subjected to the time interleave processing and is directly supplied to the Viterbi decoding section 31. In the Viterbi decoding unit 31, the program selecting unit 2
9 for the control information data DCD from the C.9 and the program data DPD 'from the time deinterleave unit 30 are subjected to error correction by the likelihood maximum decoding method. As a result, the selected program data DPD 'subjected to the error correction processing and the control information data DCD subjected to the error correction processing are obtained from the Viterbi decoding unit 31.

As described above, the data reproducing unit 2 including the A / D conversion unit 25 to the Viterbi decoding unit 31
3 is a program data DP selected based on the digital audio broadcast signal received by the tuning receiver 22.
An operation of reproducing D ′ and the control information data DCD is performed. Then, the Viterbi decoding unit 3 in the data reproducing unit 23
1 selected program data DPD 'obtained from
Is supplied to the program selection unit 32, and the control information data DCD obtained from the Viterbi decoding unit 31 in the data reproduction unit 23 is supplied to the control unit 50.

The program selection section 32 has a data selection control signal CAS from the control unit 50 in addition to the program data DPD 'selected from the Viterbi decoding section 31.
Is supplied. And from the program selection unit 32,
Under the control of the data selection control signal CAS, when the selected program data DPD ′ subjected to the error correction processing from the Viterbi decoding unit 31 is the audio program data, the audio program data DAD is derived,
When the program data DPD 'subjected to the error correction processing from the Viterbi decoding unit 31 is general program data, the general program data DSD is derived.

The audio program data DAD derived from the program selection section 32 is supplied to a high efficiency decoding section 33. The high-efficiency decoding unit 33 performs high-efficiency decoding processing on the audio program data DAD,
The data compressed by the high-efficiency encoding process is decompressed,
Decoded audio data DA is obtained. Further, from the high-efficiency decoding unit 33, program-related data DPA included in the audio program data DAD is obtained and supplied to the control unit 50. Such program-related data D
The PA includes the unfixed-length program-related data X-PAD and the fixed-length program-related data F-PAD.

The decoded audio data DA obtained from the high efficiency decoding section 33 is digital / analog (D /
A) The data is supplied to the conversion unit 34 and converted into an analog signal, and the D / A conversion unit 34 forms a reproduced audio signal SA corresponding to the audio data DA, which is transmitted from the output terminal of the D / A conversion unit 34. Under these circumstances, the high-efficiency decoding unit 33
And a D / A conversion unit 34 constitute an audio signal output unit for obtaining a reproduced audio signal SA based on the audio program data DAD derived from the program selection unit 32.

The reproduced audio signal SA sent from the output terminal of the D / A converter 34 is supplied to an audio reproducing unit including, for example, a speaker, and is based on audio information represented by the audio program data DAD. Used for audio playback.

The general program data DSD derived from the program selection section 32 is supplied to a decoding section 35. In the decoding unit 35, decoding processing is performed on the general program data DSD to obtain reproduction general data DS based on the general program data DSD.
It is sent from the output end of the decoding unit 35.

Control unit 50 forming an operation control unit
Are the control information data DCD from the Viterbi decoding unit 31,
Program-related data DP from the high-efficiency decoding unit 33
A, a control command CR corresponding to the remote control signal SR from the receiving unit 41 that receives the remote control signal SR from the remote operation control unit 40, or a control command according to the operation from the input operation unit 42 According to CX or the like, a program selection control signal CPR, a program selection control signal CAS, and control data DVD are formed.
The program selection control signal CPR is transmitted to the program selection unit 29.
Then, the program selection control signal CAS is sent to the program selection unit 32, and the control data DVD is sent to the Viterbi decoding unit 3.
1 to control the operation of the program selection unit 29, the program selection unit 32, and the Viterbi decoding unit 31. The input operation unit 42 includes, for example, a keyboard, and allows the user in the example shown in FIG. 1 to input a keyword.

The control information data DCD supplied from the Viterbi decoding unit 31 to the control unit 50 includes ensemble label data, service label data, and service component label data, which are character information data transmitted by the FIC. In addition, the high efficiency decoding unit 3
The program-related data DPA supplied to the control unit 50 from the control unit 3 is dynamically transmitted as undefined-length program-related data X-PAD in an audio frame formed by each of a plurality of audio program data included in the audio information data in the MSC. Contains label data.

In the control unit 50, a character data capturing unit incorporated therein detects ensemble label data, service label data or service component label data included in the control information data DCD from the Viterbi decoding unit 31, and Detecting the dynamic label data included in the program-related data DPA from the high-efficiency decoding unit 33, and connecting the detected ensemble label data, service label data, service component label data or dynamic label data to the control unit 50. An operation of storing the information as character information data DCH in the memory unit 43 is performed. The writing of the character information data DCH to the memory unit 43 by the character data capturing unit built in the control unit 50 is performed in the example shown in FIG. This is performed as needed under the condition that the obtained program data DPD ′ and control information data DCD are obtained.

A display unit 44 for displaying images is connected to the control unit 50. The display unit 44 includes display data DS supplied from the control unit 50.
According to L, an image is displayed according to the operation state of the control unit 50.

Under these circumstances, for example, the user in the example of FIG. 1 inputs a search keyword from the input operation unit 42 in order to perform a keyword search on voice program data or general program data. Control command C supplied to control unit 50 from
When X represents a search keyword, in the control unit 50, a keyword matching unit incorporated therein detects and holds the search keyword represented by the control command CX supplied from the input operation unit 42. At the same time, the character information data DCH stored therein is appropriately read from the memory unit 43, and the ensemble label data, the service label data, and the service component represented by the character information data DCH read from the memory unit 43 for the input search keyword Executes collation with label data or dynamic label data.

The matching of the ensemble label data, the service label data, the service component label data, or the dynamic label data with respect to the inputted search keyword by the keyword matching unit built in the control unit 50 is performed by using an ensemble label, The search keyword is hierarchically formed into ensemble label data, service label data, service component label data, or dynamic label data according to a hierarchical relationship as shown in FIG. 4 formed by the service label, the service component label, and the dynamic label. This is performed by collating.

That is, first, the input search keyword is collated with the ensemble label data included in the control information data DCD obtained from the Viterbi decoding unit 31 at that time. As a result, when the search keyword does not match the ensemble label, the search keyword is collated with a plurality of service label data respectively representing a plurality of service labels lower than the ensemble label. As a result, if the search keyword does not match any of the plurality of service labels, the search keyword is compared with a plurality of service component label data respectively representing a plurality of service component labels lower than the service label. As a result, when the search keyword does not match any of the plurality of service component labels, the search keyword is compared with a plurality of dynamic label data respectively representing a plurality of dynamic labels further lower than the service component label.

If the search keyword does not match any of the plurality of dynamic labels, the keyword matching unit in the control unit 50 outputs the display data DSL for displaying an image indicating that the keyword search was not successful. It is supplied to the display unit 44. As a result, an image is displayed on the display unit 44 indicating that the keyword search was not successful.

On the other hand, as a result of the collating operation by the keyword collating unit in the control unit 50, the retrieval keyword matches any one of a plurality of dynamic labels, any one of a plurality of service component labels, or any one of a plurality of service labels. In this case, the program selection control unit incorporated in the control unit 50 controls the voice program data or the general program data to which the dynamic label, the service component label, or the service label matching the search keyword is attached, that is, the input search. Voice program data or general program data corresponding to the keyword is selected in the program selection unit 29 and the program data DPD is selected.
And the audio program data DA based thereon
A program selection control signal CPR and a program selection control signal CAS for forming D or general program data DSD from the program selection unit 32 are formed and supplied to the program selection unit 29 and the program selection unit 32, respectively. I do. As a result, in the program selecting section 29, the voice program data or general program data corresponding to the input search keyword is selected as the program data DPD, and the voice program data DAD or general program data DSD based on the program data is selected. 32.

The input search keyword is the control information data DC obtained from the Viterbi decoding unit 31 at that time.
If the ensemble label data included in D matches the represented ensemble label, the search keyword is further collated with a plurality of service label data respectively representing a plurality of service labels below the ensemble label. As a result, when the search keyword matches any one of the plurality of service labels, the program selection control unit built in the control unit 50 sends the voice program data or the general program data with the service label matching the search keyword. That is, voice program data or general program data corresponding to the input search keyword is selected in the program selecting section 29 and the program data DPD
And the audio program data DA based thereon
A program selection control signal CPR and a program selection control signal CAS for forming D or general program data DSD from the program selection unit 32 are formed and supplied to the program selection unit 29 and the program selection unit 32, respectively. I do. Thereby, in the program selecting section 29, the audio program data or the general program data corresponding to the search keyword is selected as the program data DPD, and the audio program data DAD or the general program data DSD based thereon is obtained from the program selecting section 32. Will be.

On the other hand, when the input search keyword does not match any of the plurality of service labels, the keyword matching unit in the control unit 50 converts the display data DSL corresponding to the plurality of service label data. Is supplied to the display unit 44. As a result, a plurality of service labels, each of which is represented by a plurality of service label data, is displayed on the display unit 44 as an image, and the user in the example of FIG. An operation to select the item is required.

The user in the example of FIG. 1 operates the input operation unit 42 within a predetermined time,
When any one of the plurality of service labels image-displayed on the display unit 44 is selected, the program selection control unit built in the control unit 50 outputs the audio program data or the voice program data with the selected service label. General program data is selected by the program selection unit 29 and obtained as program data DPD,
A program selection control signal CP for allowing audio program data DAD or general program data DSD based thereon to be obtained from program selection unit 32.
R and a program selection control signal CAS are formed and supplied to the program selection unit 29 and the program selection unit 32, respectively. Thereby, in the program selecting section 29, the audio program data or the general program data to which the selected service label is attached is selected as the program data DPD, and the audio program data DAD or the general program data DSD based thereon is selected by the program selecting section. 32.

If the user in the example of FIG. 1 does not select any of the plurality of service labels image-displayed on the display unit 44 within a predetermined time, the control unit 50 The keyword matching unit
The display data DSL for displaying an image indicating that the keyword search was not successful is supplied to the display unit 44. As a result, an image is displayed on the display unit 44 indicating that the keyword search was not successful.

Thus, in the example shown in FIG. 1, the user searches the input operation section 42 for a selection of voice program data or general program data according to his / her own intention. Keyword search can be performed by inputting a keyword. Therefore, selection of program data such as music program data and general program data can be made with a relatively large degree of freedom and a wider selection. It can be done in a way.

FIG. 5 shows that the control unit 50 in the example shown in FIG. 1 as described above uses a keyword search method to select voice program data or general program data under the configuration using a microcomputer. To be performed when done,
4 shows a flowchart illustrating an example of a control program. This flowchart is applied when a keyword search for selecting audio program data or general program data is started in a state in which the example of FIG. 1 is receiving a specific ensemble. .

In the flowchart shown in FIG. 5, after starting, in step 61, it is determined whether or not a search keyword has been input. As a result, if the search keyword has not been input, the determination in step 61 is repeated. If the result of determination in step 61 is that a search keyword has been entered, step 6
2, the input search keyword is held, and the search keyword is compared with the ensemble label data included in the control information data DCD obtained from the Viterbi decoding unit 31 at that time, that is, the current ensemble label data. It is determined whether the searched search keyword matches the current ensemble label.

If the result of determination in step 62 is that the search keyword does not match the ensemble label, in step 63, a plurality of service label data representing a plurality of service labels lower than the ensemble label are stored in the memory unit 43. The read keyword is checked against a plurality of service label data to determine whether the search keyword matches any of the plurality of service labels. As a result, if the search keyword does not match any of the plurality of service labels, in step 64, the memory unit 43 stores a plurality of service component label data respectively representing a plurality of service component labels lower than the service label.
, And matches the search keyword with a plurality of service component label data to determine whether the search keyword matches any of the plurality of service component labels.

If the result of determination in step 64 is that the search keyword does not match any of the plurality of service component labels, then in step 65 each of the plurality of dynamic labels whose search keyword is lower than the service component label is assigned. The dynamic label data represented is read from the memory unit 43, and the search keyword is collated with a plurality of dynamic label data. As a result, if the search keyword does not match any of the plurality of dynamic labels, display data DSL for displaying an image indicating that the keyword search was not successful is displayed as a search result signal in step 66. It is sent to the unit 44 and returns to step 61. As a result, an image is displayed on the display unit 44 indicating that the keyword search was not successful.

On the other hand, if the result of the judgment in step 63 indicates that the search keyword matches any of the plurality of service labels, the result of the determination in step 64 indicates that the search keyword matches any of the plurality of service component labels Alternatively, if the result of determination in step 65 is that the search keyword matches any of the plurality of dynamic labels, a service label, service component label, or dynamic label that matches the search keyword is added in step 67. Voice program data or general program data, that is, voice program data or general program data corresponding to the search keyword is selected in the program selection unit 29 and obtained as the program data DPD, and based on that, A program selection control signal CPR and a program selection control signal CAS for making the audio program data DAD or the general program data DSD obtainable from the program selection unit 32 are sent to the program selection unit 29 and the program selection unit 32, respectively. Then, the process returns to step 61. Thereby, in the program selecting section 29, the audio program data or the general program data corresponding to the search keyword is selected as the program data DPD, and the audio program data DAD or the general program data DSD based thereon is obtained from the program selecting section 32. Will be.

If the result of determination in step 62 is that the search keyword matches the ensemble label,
In step 68, a plurality of service label data, each of which represents a plurality of service labels whose search keywords are below the ensemble label, are read from the memory unit 43, and the search keyword is collated with the plurality of service label data. It is determined whether it matches any of the service labels. As a result, if the search keyword matches any one of the plurality of service labels, the process proceeds from step 68 to step 67, and in step 67, voice program data or general program data to which a service label matching the search keyword is attached, That is, the voice program data or general program data corresponding to the search keyword is
A program selection control signal CPR and a program selection control signal which are selected by the program selection unit 29 and obtained as the program data DPD so that the audio program data DAD or the general program data DSD based on the program data DPD are obtained from the program selection unit 32 The CAS is sent to the program selector 29 and the program selector 32, respectively. Thereby, in the program selecting section 29, the audio program data or the general program data corresponding to the search keyword is selected as the program data DPD, and the audio program data DAD or the general program data DSD based thereon is obtained from the program selecting section 32. Will be.

On the other hand, if the result of determination in step 68 is that the search keyword does not match any of the plurality of service labels, then in step 69, display data D
The SL corresponds to a plurality of service label data, and display data DSL for displaying a service label list is transmitted to the display unit 44. As a result, a service label list including a plurality of service labels, each of which is represented by a plurality of service label data, is displayed on the display unit 44 as an image, and the user in the example of FIG.
Is required to select one of a plurality of service labels in the service label list displayed as an image.

Subsequently, in step 70, it is determined whether or not any of a plurality of service labels in the service label list has been selected. As a result, when none of the plurality of service labels in the service label list is selected, step 71
In step, it is determined whether a predetermined time has elapsed since the transmission of the display data DSL in step 69.

As a result of the determination at step 71, step 6
If the predetermined time has not elapsed since the transmission of the display data DSL in step 9, the process returns to step 70, whereas if the predetermined time has elapsed since the transmission of the display data DSL in step 69, Proceed to step 66.

If the result of determination in step 70 is that any one of a plurality of service labels in the service label list has been selected, then in step 72 voice program data or general program data corresponding to the selected service label is selected. The data is selected by the program selection unit 29 and the program data DPD
And the audio program data DA based thereon
D or the general program data DSD from the program selection unit 32 to obtain a program selection control signal CPR and a program selection control signal CAS.
Are sent to the program selection unit 29 and the program selection unit 32, respectively, and the process returns to step 61. Thereby, in the program selecting section 29, the audio program data or the general program data corresponding to the selected service label is selected as the program data DPD, and the audio program data DAD or the general program data DSD based thereon is selected by the program selecting section 32. It will be obtained from.

[0062]

As is apparent from the above description, in the broadcast signal receiving apparatus according to any one of the first to fourth aspects of the present invention, a data reproducing unit is provided. In the above, when the control information data and the program data selected by the program selection unit are reproduced based on the digital audio broadcast signal received by the reception unit, the operation control unit obtains the control information obtained from the data reproduction unit. An operation of storing the character information data included in the data and the character information data included in the selected program data obtained from the data reproducing unit in the memory unit, whereby the memory unit includes the character information data included in the control information data. Character information data and character information data included in the selected program data are stored. When a keyword is input from the input operation unit, the operation control unit executes a check on the character information data stored in the memory unit for the input keyword, and, based on the result of the check, a program selection unit. Controls the selection of program data according to.

In this case, the operation control unit may be, for example,
As in the case of the broadcast signal receiving apparatus according to the invention described in (1), as a result of collation of the keyword input from the input operation unit with the character information data stored in the memory unit, the character information data stored in the memory unit When a keyword that matches the keyword input to the keyword is detected, the program selecting unit is caused to perform an operation for selecting program data corresponding to the keyword.

According to the broadcast signal receiving apparatus according to any one of claims 1 to 4 in the claims of the present application, which operates as described above, the user can use his / her own intention. The selection of the program data along the line can be performed by a keyword search method performed by inputting a keyword from the input operation unit. It can be done with a relatively large and widened selection method.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a broadcast signal receiving apparatus according to any one of claims 1 to 4 of the present application.

FIG. 2 is a signal format used for explaining a digital audio broadcast signal received by the example shown in FIG. 1;

FIG. 3 is a data format for explaining audio program data obtained in the example shown in FIG. 1;

FIG. 4 is a conceptual diagram showing a hierarchical relationship among ensemble label data, service label data, service component label data, and dynamic label data transmitted by the digital audio broadcast signal received according to the example shown in FIG.

FIG. 5 shows a control unit in the example shown in FIG.
FIG. 5 is a flowchart showing an example of a control program executed when selection of audio program data or general program data is performed by a keyword search method under the configuration using a microcomputer. FIG.

[Explanation of symbols]

21: receiving antenna, 22: tuning receiver,
23 ... data reproduction unit, 25 ... A / D conversion unit,
26: Quadrature demodulation unit, 27: FFT differential demodulation unit, 28: Frequency deinterleave unit, 29
... Program selection unit, 30 ... Time deinterleave unit, 31 ... Viterbi decoding unit, 32
..Program selection section, 33 high-efficiency decoding section,
34 ... D / A conversion unit, 35 ... Decoding unit,
40 ... remote operation control unit, 41 ... receiving unit, 4
2 ・ ・ ・ Input operation unit, 43 ・ ・ ・ Memory unit, 44 ・
..Display unit, 50 control unit

Claims (4)

[Claims] A receiving section for selectively receiving a digital audio broadcasting signal; and a program selecting section for selecting program data obtained based on the digital audio broadcasting signal received by the receiving section. A data reproducing unit that reproduces data and control information data; an audio signal output unit that obtains a reproduced audio signal based on selected program data obtained from the data reproducing unit; and control information that is obtained from the data reproducing unit. A memory unit for storing character information data included in the data and character information data included in the selected program data obtained from the data reproducing unit; and controlling at least operations of the data reproducing unit and the memory unit An operation control unit; and an input operation capable of inputting a keyword to the operation control unit. The operation control unit converts the character information data included in the control information data obtained from the data reproduction unit and the character information data included in the selected program data obtained from the data reproduction unit to the When an operation to be stored in the memory unit and a keyword is input from the input operation unit,
Broadcast signal characterized by executing a collation of the input keyword with the character information data stored in the memory unit, and controlling the selection of the program data by the program selection unit based on the result of the collation. Receiver. 2. The broadcast signal receiving apparatus according to claim 1, wherein the operation control section hierarchically collates the input keyword with the character information data stored in the memory section. 3. As a result of the collation of the input keyword with the character information data stored in the memory unit, the operation control unit detects a match of the keyword in the character information data stored in the memory unit. 3. The broadcast signal receiving apparatus according to claim 1, wherein when the program is selected, the program selecting unit is operated to select program data corresponding to the keyword. 4. When the operation control unit receives a keyword from an input operation unit, and the operation control unit performs collation of the input keyword with character information data stored in a memory unit, the operation control unit performs 4. The broadcast signal receiving apparatus according to claim 1, further comprising a display unit for displaying an image related to an operation state of the broadcast signal.