JPH1198095A - Multiple broadcasting receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multiple broadcasting receiver which facilitates content grasp of a receiving program and improves operability. SOLUTION: A DAB (digital audio broadcasting) receiver 1 consists of a front end part 4, a DAB decoding part 6, an audio decoding part 8, a controlling part 16, a text and sound synthesizing part 18 and an operating part 40. When a user operates the part 40 to instruct receiving service switching, the part 16 specifies service that is a destination to be switched based on a service list which is included in a fast information channel FIC that is outputted from the part 6 and extracts label data for display which are prepared for display. The part 18 converts the label data into a voice signal and outputs each service name by voice.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a multiplex broadcast receiver for selecting any one of a plurality of programs multiplexed on carrier waves of different frequencies.

[0002]

2. Description of the Related Art Today, digital audio is generally recognized for its excellent characteristics and ease of use, and is rapidly spreading. Against this background, digitalization of audio broadcasting has become active, and digital audio broadcasting DAB (Digital Audio Broadcasting) has been put to practical use in Europe.

[0003] Such a DAB receiver (DAB receiver) has a considerably complicated configuration as compared with a normal VHF / FM receiver, but has many advantages that can be compensated for. For example, in a moving car, sound quality comparable to a CD can be secured, many broadcast programs can be received, programs can be broadcast in multiple languages, weather and traffic information can be received continuously, and audio and video advertisements can be received. There are advantages such as.

[0004] Currently, each broadcast channel of DAB uses a vacant frequency between reception frequencies allocated to each channel of television broadcasting, and a total of 64 channels are prepared. A carrier frequency group corresponding to each broadcast channel is called an ensemble, and 6 to 8 broadcast programs (services) are multiplexed on each ensemble.

[0005] Switching of a received program in such a DAB receiver is performed in response to an operation of a predetermined operation key by a user. For example, each time the user presses the “up” key or the “down” key, various programs (services) multiplexed in each ensemble are sequentially selected. Further, the DAB receiver has a function of displaying the name given to the service in parallel with the reception operation of such various services, and displays character data indicating the name of the service being received on a display unit provided. Can be displayed.

[0006]

By the way, as described above, the DAB receiver displays character data indicating the content of the service being received, and the user can see the service being received by viewing this display. , It is possible to determine whether the service is the desired service. However, when operating an in-vehicle DAB receiver or operating a remote DAB receiver using a remote control (remote control) unit, the user often operates without looking at the display. In some cases, the contents cannot be confirmed. In such a case, the user must listen to the received service for a while to determine the content in order to determine whether the service is the desired service. Considering the case of switching, the service selection took a lot of time and effort and the operability was poor.

[0007] The present invention has been made in view of the above points, and an object of the present invention is to provide a multiplex broadcast receiver capable of easily grasping the contents of a received program and improving operability. It is in.

[0008]

In order to solve the above-mentioned problems, a multiplex broadcast receiver according to the present invention uses program content data extracting means to extract program content data representing the content of a program received by the program receiving means. The content audio output means outputs the audio indicating the program content based on the program content data, so that it is easy to grasp the content when selecting and switching to the received program. The operability can be improved without unnecessary labor. In particular, since the contents of the received program can be grasped without looking at the display unit, this is effective when it is not easy to carefully check the display contents, such as a vehicle-mounted multiplex broadcast receiver.

[0009] Further, an operating means for instructing the reception of the program is further provided, and when the instruction for receiving the program is issued by the operating means, the sound of the contents of the program is output.
Each time the user performs an operation for selecting a program, the content of the program to be switched can be grasped each time, so that it is easy to select a program while grasping the content, and operability can be improved. .

[0010] Further, in the case of performing the audio output of the program contents described above, by using the same language as the language of each program,
Even when a plurality of programs using various languages are mixed, necessary information can be transmitted to the user. Especially,
If audio output is performed in a language that the user cannot understand, the program using this language will be excluded from the selection target. It is preferable to notify the user in the language used in.

When the multiplex broadcasting receiver is for digital audio broadcasting, label data included in a high-speed information channel of a received signal frame can be used as program content data. By performing the text-to-speech synthesis processing, an audio signal indicating the content of the received program can be easily generated.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A DAB receiver according to an embodiment to which a multiplex broadcast receiver of the present invention is applied receives a label using display label data included in control information (high-speed information channel) of a DAB signal. It is characterized by outputting a sound indicating the contents of a program. Each of the DAB services corresponds to the program described above. Hereinafter, a DAB receiver according to an embodiment will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention.
It is a figure showing the composition of AB receiver. The DAB receiver 1 shown in FIG. 1 includes an antenna 2, a front end unit (F / E)
4, DAB decoding section 6, audio decoding section 8, digital-analog converter (D / A converter) 10, amplifier 12, speaker 14, control section 16, text-to-speech synthesis section 18, operation section 40, display section 42, The switch unit 44 is included. The above-described text-to-speech synthesis unit 18 includes a dictionary ROM 20, a language processing unit 22, and a speech unit RO.
M24, a voice synthesis unit 26, a voice storage unit 28, and a D / A converter 30.

The front end unit 4 extracts a desired reception frequency (tuning frequency) component from a signal received via the antenna 2 and converts an intermediate frequency signal obtained by performing frequency conversion on the extracted signal. Output. DA
The B decoding unit 6 performs quadrature demodulation processing, FFT (fast Fourier transform) demodulation processing, and decoding processing on the intermediate frequency signal output from the front end unit 4 to demodulate the interleaved transmission data. After deinterleaving and returning to the original data string, error detection and correction processing is performed, and the high-speed information channel FIC and decoded data (MPEG audio data) including the service list of each ensemble indicating the symbol position of the multiplexed broadcast program are displayed. ) Is output.

The audio decoding unit 8 performs a decompression process for restoring the decoded data (MPEG audio data) output from the DAB decoding unit 6, and outputs decompressed PCM audio data. The D / A converter 10 converts the PCM audio data output from the audio decoding unit 8 into an analog signal and outputs the analog signal. The analog audio signal is input to the amplifier 12 via the switch unit 44, amplified, and output from the speaker 14.

The control unit 16 controls the entire DAB receiver 1 by performing frequency tuning control by the front end unit 4 and instructing the DAB decoding unit 6 to switch services. Further, the control unit 16 extracts label data and language code of each service included in the high-speed information channel FIC of the DAB signal, and the extracted various data is input to the text-to-speech synthesis unit 18.

The dictionary ROM 20 stores dictionaries corresponding to various languages such as English and Japanese, and switches the dictionary to be used based on a language code output from the control unit 16. The language processing unit 22 receives label data (text data) output from the control unit 16, analyzes the label data based on the dictionary data stored in the dictionary ROM 20, and converts continuous label data to meaning. Break it down into a word.

The phoneme ROM 24 stores phoneme data corresponding to various languages, and switches the phoneme data to be used based on the language code output from the control unit 16. The speech synthesis unit 26 receives the label data of each word decomposed by the language processing unit 22 and inputs the speech data RO.
Based on the phoneme piece data stored in M24, phoneme piece data for each sounding unit is stored in the voice storage unit 28, and voice data sequentially stored are superimposed to perform voice synthesis. The voice data synthesized in this way is D
The signal is converted into an analog audio signal by passing through the / A converter 30.

The operation unit 40 has various operation keys for inputting various operation instructions such as a service switching instruction from the user, and sends the operation status of the operation keys by the user to the control unit 16. The display unit 42 displays the name given to the service currently being received, and the operation unit 4 by the user.
0 operation status is displayed. Further, the switch unit 44 controls the two D / A converters 10 and 3 in accordance with an instruction from the control unit 16.
The audio signal input from 0 is selectively output to the amplifier 12.

The above-mentioned front end 4, DAB decoding unit 6, audio decoding unit 8 and control unit 16 are used as program receiving means, control unit 16 is used as program content data extracting means, and text / speech synthesizing unit 18 is used as content sound output means. , And the operation unit 40 correspond to the operation means.

FIG. 2 is a diagram showing a mode II frame structure employed in the DAB receiver 1. One frame length is 24 ms, and a two-symbol synchronization signal SYN
C, a high-speed information channel FIC of 3 symbols, and a data field DFL of 72 symbols. The synchronization signal SYNC includes a null symbol and a phase reference symbol PRS used to recognize the start point of the frame.

The high-speed information channel FIC is composed of three high-speed information blocks FIB. The data field DFL is divided into 72 data fields, and a broadcast signal of a predetermined service or announcement is inserted in each data field, so that 6 to 8 services can be simultaneously received from one broadcast wave. Has become. Which service corresponds to which data field is specified by service list data included in the high-speed information channel FIC.

The high-speed information block FIB is composed of a plurality of high-speed information groups FIG. Each high-speed information group FIG includes a FIG header and a FIG data field. The FIG header is composed of "FIG type" indicating the type of data included in the FIG data field, and "length" indicating the byte length of the FIG data field. The first byte of the FIG data field has different contents for each FIG type, and an extension is included in a part thereof.

For example, in the case of a type 0 field,
In the first byte of the FIG data field, a C / N (Current / Next) flag and an OE (Other En
semble) flag, P / D flag, and extension. The contents of the detailed data included in the FIG data field are defined by the FIG type and the extension. Hereinafter, for example, a data field corresponding to the extension 17 of the FIG type 0 field is represented as FIG (0/17).

The area excluding the first byte of the FIG data field contains various data specified by the FIG type and the extension. By reading this data, various reception controls can be performed. . For example, FIG (0/17) includes a program type PTy corresponding to each multiplexed service. In FIG. (0/2) and FIG. (0/3), the service list in each ensemble includes FIG.
3) is the service identification SId, FIG. (0/5) is the language code used, and FIG. 1/0 and FIG.
(1/1) includes an ensemble label or service label which is text data corresponding to each ensemble name or service name displayed on the display unit 42 during program reception.

The DAB receiver 1 of this embodiment has such a configuration, and its operation will be described next. FIG.
5 is a flowchart showing an operation procedure of a program switching operation by the DAB receiver 1 of the present embodiment, and mainly shows an operation procedure by the control unit 16 and the text-to-speech synthesis unit 18.
It is assumed that any one of the channels is currently being received, and thereafter, when the “up” key or the “down” key of the operation unit 40 is pressed, the program is switched in a predetermined order. In addition, the program switching is shown in FIG.
It is assumed that the order follows the service identification SId included in (0/3).

The control unit 16 constantly monitors whether an "up" key or a "down" key provided on the operation unit 40 has been pressed. It is determined whether or not an instruction has been given (step 101). When any key is pressed, the control unit 16 switches the service to be received according to the pressed key (step 102). Specifically, the control unit 16 extracts a service list, which is a service list multiplexed in the ensemble being received, based on FIG (0/2) and FIG (0/3). Service identification S of each service included in the service list
The Id is read out, and the service identification Sid corresponding to each of these services is compared with the service identification Sid corresponding to the currently received service.

For example, when the “up” key of the operation unit 40 is pressed, the control unit 16 sets another service corresponding to the service identification Sid having a value larger than the service identification Sid of the currently received service. Find out if there is. As a result, if there is a corresponding service, the control unit 16 instructs the DAB decoding unit 6 to separate the service having the next largest service identification SId from the currently received service from the multiplexed data. Send instructions. The DAB decoding unit 6 responds to the instruction sent from the control unit 16 and selects audio data (MPEG audio data) of the service corresponding to the specified service identification SId from the multiplexed data included in the data field DFL. Is extracted. The extracted audio data is converted into PCM audio data by the audio decoding unit 8, converted into an analog audio signal by passing through the D / A converter 10, and then input to one input terminal of the switch unit 44. You.

On the other hand, when there is no other service to be switched within the same ensemble, the control unit 16 issues a reception frequency switching instruction to the front end unit 4 and receives it by the front end unit 4. After the frequency of the carrier is switched, the DAB decoder 6 is instructed to separate the service with the smallest service identification SId from the plurality of services included in the ensemble corresponding to the switched carrier. The DAB decoding unit 6 responds to an instruction sent from the control unit 16 to select from among the multiplexed data included in the data field DFL.
The audio data (MPEG audio data) of the service corresponding to the specified service identification SId is extracted. The extracted audio data is converted into PCM audio data by the audio decoding unit 8, converted into an analog audio signal by passing through the D / A converter 10, and then input to one input terminal of the switch unit 44. You.

After the above-described service switching operation,
Alternatively, in parallel with the switching operation, the control unit 16
Analyze G (1/1) and FIG (0/5) (Step 1)
03), label data as display text data indicating the contents of each service is obtained from FIG (1/1), and a language code used in each service is obtained from FIG (0/5). The label data and the language code thus obtained are output to the text-to-speech synthesis unit 18 (step 104).

Next, the text-to-speech synthesis unit 18 creates voice data indicating the contents of the switched service based on the label data and the language code output from the control unit 16 (step 105). First, the language code is the dictionary RO
M20 and the speech element ROM 24 are input, and the respective dictionaries or speech element data are switched to contents corresponding to language codes. Next, the language processing unit 22 analyzes the input label data using the dictionary ROM 20 switched to the content corresponding to the language code in this way, and decomposes the label data into meaningful words. The speech synthesis unit 26 stores the speech element ROM 2 switched to the content corresponding to the language code.
4, phoneme piece data (speech data) is extracted in units of one pronunciation for each of the words decomposed by the language processing unit 22, and the extracted phoneme piece data is superimposed for each word to perform speech synthesis. The audio data synthesized in this manner is converted into an analog audio signal by passing through the D / A converter 30, and then input to the other input terminal of the switch unit 44.

Next, the control unit 16 sends an input voice switching instruction to the switch unit 44, and the switch unit 44, to which the switching instruction has been input, receives the D
An audio signal corresponding to the name given to the service after reception switching output from the / A converter 30 is output (step 106). The audio signal output from the switch unit 44 is amplified by passing through the amplifier 12 and
4 is output. The audio output of the service name performed in this manner is continued for a predetermined time or until no audio signal is generated.

After that, the control section 16 sends an input voice switching instruction to the switch section 44 again, and the switch section 44 to which the switching instruction has been input outputs the audio signal input from the audio decoding section 8 side. (Step 10
7). The audio signal corresponding to each service output from the switch unit 44 is amplified by passing through the amplifier 12 and output from the speaker 14.

As described above, the DAB receiver 1 of the present embodiment
Generates and outputs an audio signal based on display label data corresponding to the service to be switched to when a reception service switching operation is performed by pressing an operation key provided in the operation unit 40. Therefore, the user of the DAB receiver 1 can grasp the contents of the switched service (for example, whether it is news or sports) from the output sound. In particular, when operating the in-vehicle DAB receiver 1 or performing service switching using the remote control unit, the user often operates without looking at various information displayed on the display unit 42. The voice output makes it easy to grasp the general contents of each service without actually listening to the contents of the service, and can efficiently perform a service switching operation, thereby improving operability. .

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, in the embodiment described above, FIG (1
/ 1) is analyzed to obtain the label data, so that the service name is output as voice.
By analyzing (1/0), the label data of each ensemble may be obtained, and the ensemble name may be output as voice. Alternatively, the FIG. (1/16) may be analyzed to obtain the label data of the components (the services are further classified) constituting each service, and the service component name may be output as voice.

Further, these names may be combined for audio output. For example, when the user performs a service switching operation, first, the ensemble name corresponding to the service to be switched to is output as voice, the service name is subsequently output as voice, and then the service voice is output. Good.

In the above-described embodiment, each time a service switching instruction is issued, one service label is acquired, the service name is output as voice, and then the service is output as voice. In this case, the voice of the service may not be output and only the service name may be sequentially output. Alternatively, the services included in all the receivable ensembles may be sequentially received by performing the frequency sweep, and each service name and the service, or only each service name, may be sequentially output as audio.

[0038]

As described above, according to the present invention, program content data representing the content of a received program is extracted from a received signal, and sound representing the program content is output based on the extracted program content data. Thereby, it is easy to grasp the contents when selecting and switching the received program, and it is possible to improve operability without unnecessary labor when selecting the received program. In addition, by outputting audio of the program contents when a program receiving instruction is given by the operation means, it is possible to grasp the contents of the switching destination program each time the user performs an operation for selecting a program. Can easily select programs while grasping the content.
Operability can be improved. Furthermore, when performing the audio output of the above-described program contents, by using the same language as the language of each program, even when a plurality of programs using various languages are mixed, information necessary for the user is provided. Can be conveyed.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of a DAB receiver according to an embodiment to which the present invention has been applied.

FIG. 2 is a diagram illustrating a frame structure used in a DAB receiver.

FIG. 3 is a flowchart showing an operation procedure of a program switching operation.

[Explanation of symbols]

 Reference Signs List 1 DAB receiver 4 Front end section 6 DAB decoding section 8 Audio decoding section 10, 30 Digital-analog (D / A) converter 16 Control section 18 Text-to-speech synthesis section 20 Dictionary ROM 22 Language processing section 24 Phoneme ROM 26 Speech Synthesis unit 28 Voice storage unit 44 Switch unit

Claims (5)

[Claims] 1. A program receiving means for extracting program data included in a received signal and receiving a predetermined program, and a program for extracting program content data representing the content of the program received by the program receiving means from the received signal. Content data extracting means; and content sound output means for outputting sound indicating the contents of the program received by the program receiving means based on the program content data extracted by the program content data extracting means. Multiplex broadcast receiver. 2. The apparatus according to claim 1, further comprising an operation unit for instructing reception of a program, wherein when the operation unit instructs reception of the program,
A multiplex broadcast receiver for outputting audio by the content audio output means. 3. The multiplex broadcast receiver according to claim 1, wherein the content audio output means performs audio output using a language of a corresponding program. 4. The program according to claim 1, wherein the received signal corresponds to digital audio broadcasting, and the program content data is label data for displaying a program name included in a high-speed information channel of a received signal frame. A multiplex broadcast receiver, characterized in that: 5. The content audio output unit according to claim 4, wherein the content audio output unit generates an audio signal indicating the content of the program received by the program reception unit by performing a text audio synthesis process based on the label data. A multiplex broadcast receiver characterized by the above-mentioned.