JPH1198094A - Multiple broadcasting receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multiple broadcasting receiver which eliminates a feeling of wrongness of an operation and the anxiety of a user who operates it. 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, an operating part 20 and a buzzer 18. When a user operates the part 20 to instruct program switching, the part 16 decides whether a program which is a destination to be switched is included in a carrier frequency which is the same with the program that is currently received or in a different carrier frequency based on a fast information channel FIC that is outputted from the part 6 and outputs operational tone which is mutually identifiable and different in accordance with the decision result.

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. When selecting and receiving a desired program from programs multiplexed on each of a plurality of ensembles, for example, the user presses an up key or a down key of a remote control (remote control) unit to receive a program to be listened to. It is necessary to perform the program switching operation until the end.

[0005]

By the way, the above-mentioned D
In the AB receiver, for example, when the received program is switched by pressing the up key, switching to another program in the same ensemble and switching to another program included in another ensemble different from the currently received ensemble are performed. Since the time required for the switching operation differs depending on the case,
Even when the same operation key is pressed, the response time corresponding to the pressing operation is different, and the operation is uncomfortable. Which ensemble contains the program that is being received is displayed on the display unit of the receiver, so if you switch the program while watching this display, the ensemble will switch at the time of program switching and it will take time. You know if
When operating a vehicle-mounted DAB receiver or operating a remote DAB receiver using a remote control unit, the user often operates without looking at the display. The user is anxious because it is not known whether the program is being taken or because it is taking a long time because the instruction to switch the program was not correctly received.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a multiplex broadcast receiver capable of removing an uncomfortable feeling of operation and anxiety of a user operating the same. It is in.

[0007]

In order to solve the above-mentioned problems, a multiplex broadcast receiver according to the present invention selects one of programs multiplexed on a plurality of carrier waves having different frequencies. When switching received programs, switching between programs included in carriers of the same frequency and switching between programs included in carriers of different frequencies corresponds to a switching instruction operation. The output operation sound is different. When switching between programs included in the same carrier frequency, the process of switching the carrier is not required, so that the received program can be switched in a relatively short time. In the case of performing the switching, the new program needs to be received after the synchronization is established by switching the carrier wave, so that a relatively long time is required to switch the received program. As described above, the program switching time differs depending on whether the two programs before and after the switching are included in the same carrier frequency, but the operation sound is made different in accordance with each of the programs, so that the program switching instruction is issued. The user who has performed can know whether it takes time to switch the program by listening to the operation sound, and can remove uncomfortable feeling and anxiety felt when the time required to switch the program is not known.

Specifically, the above-described receiver includes a program switching instruction means, a program receiving means, and an operation sound output means, and when a program switching instruction is issued by the program switching instruction means, The received program is switched by the program receiving means, and at this time, different operation sounds are output by the operation sound output means depending on whether to switch between programs included in the same carrier frequency. Therefore, the user can know whether the switching of the received program takes a long time only by listening to the operation sound output by the operation sound output means when operating the program switching instruction means. Even when it is not easy to perform the switching operation while looking at the display unit, such as when operating the multiplex broadcasting receiver or remotely operating the multiplex broadcasting receiver from a remote position with the remote control unit, Discomfort and anxiety caused by not knowing the time required are eliminated.

The above-described program switching operation is performed in a predetermined order when an operation key provided on the program switching instruction means is operated, or when information on receivable programs is stored in the storage means in advance. It is conceivable that the stored program is directly designated by operating an operation key provided on the program switching instruction means. In particular, when directly specifying the program to be switched, the program currently being received and the program to be switched to are not particularly related, so the time required when switching the program in accordance with the next operation is set. Although it cannot be predicted, the required time can be known from the operation sound, so that the above-mentioned discomfort and anxiety can be removed even when the program is switched at random.

When the multiplex broadcast receiver described above is for digital audio broadcast, the operation sound output means includes:
It is preferable to determine whether or not the next program to be switched is included in the same carrier frequency based on information included in the high-speed information channel of the received signal frame. Since this high-speed information channel includes the configuration information of the program (service) included in each carrier, it is determined whether or not the program to be switched is included in the same carrier frequency as the program currently being received. Can be performed.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a DAB receiver according to an embodiment to which the multiplex broadcast receiver of the present invention is applied, when a program being received is switched, whether the program is switched to another program included in the same ensemble or a different ensemble is used. The feature is that the timbre of the operation sound emitted when the operation key is pressed is changed depending on whether to switch to another program included in the program.
The above-mentioned program includes both the DAB service and the announcement. Hereinafter, a DAB receiver according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a D according to 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, buzzer 18, operation section 20, display section 22 Have been.

The front end unit 4 extracts a desired reception frequency (tuning frequency) component from the 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. This analog audio signal is amplified by the amplifier 12 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 program designation to the DAB decoding unit 6. In addition, the control unit 16 variably controls the frequency (tone) when the buzzer 18 sounds at the time of program switching. Operation unit 20
Is provided with various operation keys for inputting operation instructions such as a program switching instruction from the user, and sends the operation state of the operation keys by the user to the control unit 16. The display unit 22 displays the name of the program currently being received, and displays the operation status of the operation unit 20 by the user.

The above-mentioned operation unit 20 serves as a program switching instructing unit, and the front end unit 4, DAB decoding unit 6, audio decoding unit 8 and control unit 16 serve as a program receiving unit.
The control unit 16 and the buzzer 18 correspond to operation sound output means, respectively.

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 text data corresponding to each ensemble name or service name displayed on the display unit 22 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 of a frequency switching operation controlled by the control unit 16. 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 20 is pressed, the program is switched in a predetermined order. In addition, the program switching is performed by using FIG (0
/ 3) according to the order of the service identification SId.

The control unit 16 constantly monitors whether an "up" key or a "down" key provided on the operation unit 20 has been pressed. It is determined whether or not an instruction has been given (step 101). When any key is pressed, the control unit 1
No. 6 determines whether there is a next program to be switched in the same ensemble (step 102). More specifically, the control unit 16 determines that FIG (0/2) and FIG (0 /
3), a service list, which is a list of programs multiplexed in the ensemble being received, is extracted, the service identification SId of each program included in the service list is read, and the service ID corresponding to each of these programs is read. The service identification SId is compared with the service identification Sid corresponding to the currently received program. For example, when the “up” key of the operation unit 20 is pressed, the control unit 16 determines whether there is another program corresponding to the service identification Sid having a value larger than the service identification Sid of the currently received program. If there is a corresponding program, it is determined that there is a next program to be switched within the same ensemble. Conversely, when the “down” key of the operation unit 20 is pressed, the control unit 16 determines that the service identification SId is smaller than the service identification Sid of the program currently being received.
It is checked whether or not there is another program corresponding to the above. If there is such a program, it is determined that the next program to be switched within the same ensemble exists.

When there is another program to be switched within the same ensemble, the control unit 16 responds to the operation of the "up" key or the "down" key of the operation unit 20 to generate a tone "pip". Sound the buzzer 18 (step 103) and switch the program being received (step 104). For example, “up” of the operation unit 20
When the key is pressed to instruct the switching of the program, the control unit 16 instructs the DAB decoding unit 6 to provide the DAB decoding unit 6 with a program having a service identification Sid next to the service identification SId of the currently received program. An instruction to separate from the multiplexed data is sent. The DAB decoding unit 6 includes the control unit 1
6 according to the instruction sent from the data field D
From the multiplexed data included in the FL, audio data (MPEG) of the program corresponding to the specified service identification SId
Audio data). The extracted audio data is converted to PCM audio data by the audio decoding unit 8, further converted to an analog signal by the D / A converter 10, and output from the speaker 14. Thus, the switching operation of the program being received is performed.

On the other hand, when there is no other program to be switched in the same ensemble, the control unit 16 responds to the operation of the “up” key or the “down” key of the operation unit 20 by pressing The buzzer 18 is sounded with the tone (step 105), and the program is switched by changing the carrier frequency and switching the ensemble being received (steps 106 and 107). For example, when the “up” key of the operation unit 20 is pressed and an instruction to switch the program is issued, the control unit 16 issues an instruction to switch the reception frequency to the front end unit 4, and After switching the frequency of the carrier wave to be received, the DAB decoding unit 6 sends an instruction to the DAB decoding unit 6 to separate the program having the smallest service identification Sid from among a plurality of programs included in the ensemble corresponding to the switched carrier wave. The DAB decoding unit 6 responds to the instruction sent from the control unit 16 and selects the specified service identification SI from the multiplexed data included in the data field DFL.
The audio data (MPEG audio data) of the program corresponding to d is extracted. The extracted audio data is converted to PCM audio data by the audio decoder 6, further converted to an analog signal by the D / A converter 10, and output from the speaker 14. Thus, the switching operation of the program being received is performed.

FIG. 4 is a diagram showing an example of the program switching operation. For example, it is assumed that three programs 1 to 3 are multiplexed in ensemble 1 and ensemble 2, respectively, and the service identification SId of each program increases in the order of program 1, program 2, and program 3. As shown in the figure, when the “up” key of the operation unit 20 is pressed during reception of the program 1 included in the ensemble 1, among the other programs multiplexed in the same ensemble 1, Service identification S than program 1 being received
Id is switched to the next largest program 2. At this time,
The buzzer 18 outputs an operation sound “beep”.
Similarly, when switching from the program 2 included in the ensemble 1 to the program 3, the buzzer 18 outputs an operation sound “beep”. However, if the “up” key of the operation unit 20 is pressed again in this state,
The service identification S among the programs multiplexed in the ensemble different from the ensemble containing the program currently being received
The Id is switched to the small program 1. At this time, the buzzer 18 outputs an operation sound “buzz”. By listening to these operation sounds, the user can determine whether or not it will take a long time before the sound of the next program is output according to the switching operation.

As described above, the DAB receiver 1 of this embodiment
When the operation key provided on the operation unit 20 is pressed and the received program is switched, the ensemble including the program currently being received is switched to another program included in the same ensemble. When switching to another program included in an ensemble different from the ensemble containing the program being received, the tone of the operation sound emitted when operating the operation key is changed. Therefore, the user of the DAB receiver 1 can know from the operation sound whether or not it takes time to perform the program switching operation. Even so, the cause is known,
There is no uncomfortable feeling in operation. In particular, even if the switching operation takes a long time, the cause is known, so that the user may become uneasy considering the case where the switching operation is not normally accepted, the case where the DAB receiver 1 is abnormal, and the like. Not even. In addition, the DAB receiver 1 for the vehicle
When operating the TV or switching the program using the remote control unit, the switching operation is often performed without looking at the various information displayed on the display unit 22. It is convenient if the above-mentioned discomfort and anxiety can be removed by notifying by sound.

According to the above-described operation procedure shown in FIG. 3, when the "up" key or the "down" key is pressed, the program is switched in a predetermined order. Possible programs are stored in advance in a memory (not shown) as program storage means,
The storage number may be directly specified by the ten keys of the operation unit 20.

FIG. 5 is a flowchart showing a modified example of the operation procedure of the program switching operation by the DAB receiver 1 of the present embodiment, and shows an operation procedure when an arbitrary program is directly designated. The operation procedure shown in FIG. 5 is different from the “operation for determining whether there is a next program in the same ensemble” in step 102 shown in FIG. (Operation 102A for determining whether or not the program is within the program), and the rest is common to the operation of each step in FIG.

When a receivable program is directly designated by the numeric keypad of the operation unit 20, programs stored so as to correspond to consecutive numeric keys are not necessarily included in the same ensemble. It is difficult to predict the time until the received program is switched according to the time. However, in the DAB receiver 1 according to the present embodiment, the time required to switch the program depends on the difference in the operation sound when the ten-key is pressed to switch the program. Since it is known whether this is the case, the user who has performed the operation does not feel uncomfortable or uneasy.

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. For example, in the above-described embodiment, the operation unit 20 is provided with an “up” key and a “down” key, and when these keys are pressed, a service identification Sid is assigned to a program multiplexed in the same ensemble. Although the values are switched in descending order, the type of key operated to issue a program switching instruction and the order of programs switched within the same ensemble can be changed as appropriate.

The tone of the operation sound to be heard by the user is switched depending on whether to switch to another program included in the same ensemble as the ensemble containing the program currently being received or to another program included in a different ensemble. Was changed, but the tone of the operation sound was the same.
The sound may be sounded only once, and the other may sound an intermittent sound such as "beep beep ...". That is, two sounds that can be identified by the user may correspond to each case.

In the above-described embodiment, the operation sound such as "beep" is output from the buzzer 18. However, two sounds that can be distinguished from each other or one of the sounds are output from the speaker 1.
4 may be output. For example, when switching to a program included in an ensemble different from the ensemble currently being received, a guidance voice such as "Please wait for a while, the frequency is being switched" is output from the speaker 14, or light music is output. Is also good.

[0034]

As described above, according to the present invention, when one of the programs multiplexed on a plurality of carriers having different frequencies is selected to switch the received program, the same program is used. The operation sound to be output in response to the switching instruction operation differs between when switching between programs included in a carrier wave of a frequency and when switching between programs included in a carrier wave having a different frequency. Therefore, when the program switching time differs depending on whether the two programs before and after the switching are included in the same carrier frequency, the program switching instruction is issued by making the operation sounds different in accordance with each. By hearing the operation sound, the user can know whether or not it takes time to switch the program, and can remove uncomfortable feeling and anxiety when he does not know the time required to switch the program.

In particular, since the information included in the high-speed information channel of the received signal frame for digital audio broadcasting includes the configuration information of the program (service) included in each carrier frequency, the program to be switched to is selected. Is determined to be included in the same carrier wave frequency as the program currently being received, it is possible to vary the operation sound at the time of program switching according to this determination result.

[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.

FIG. 4 is a diagram showing an example of a program switching operation.

FIG. 5 is a flowchart showing a modification of the operation procedure of the program switching operation.

[Explanation of symbols]

 Reference Signs List 1 DAB receiver 4 Front end unit 6 DAB decoding unit 8 Audio decoding unit 16 Control unit 18 Buzzer 20 Operation unit 22 Display unit

Claims (5)

[Claims] 1. A multiplex broadcast receiver for selecting one of programs multiplexed on a plurality of carriers having different frequencies to switch a received program, wherein the multiplex broadcast receiver is included in carriers having the same frequency. A multiplex broadcast receiver characterized by differentiating operation sounds to be output in response to a switching instruction operation between a case where switching is performed between programs and a case where switching is performed between programs included in carrier waves having different frequencies. 2. A multiplex broadcasting receiver for selecting one of programs multiplexed on a plurality of carrier waves having different frequencies to switch a received program, wherein the received program is switched in accordance with a predetermined operation. A program switching instructing means for instructing the switching of a received program, and selecting and receiving any one of the plurality of programs, and receiving a program to be received when the program switching instructing means instructs to switch a received program. A program receiving unit that performs switching of the program, and when the predetermined operation is performed on the program switching instruction unit, the program switching performed in response to the operation is performed within the same carrier wave frequency or different. An operation sound output unit that outputs operation sounds that can be distinguished from each other depending on whether the operation is performed between carrier frequencies. 3. The program switching instruction means according to claim 2, wherein the program switching instruction means has an operation key for selecting and instructing a plurality of receivable programs in a predetermined order, and wherein the program reception means operates the operation key. A multiplex broadcast receiver that switches a received program according to a predetermined order when the multiplex broadcast is received. 4. The program according to claim 2, further comprising program storage means for storing information on a receivable program, wherein said program switching instruction means is any one of the receivable programs stored in said program storage means. A multiplex broadcast receiver, comprising: an operation key for identifying the program; and wherein the program receiving means switches to a program specified by the operation key when the operation key is operated. 5. The operation sound output means according to claim 2, wherein the operation sound output means selects the next program to be switched next based on information included in the high-speed information channel of the received signal frame for digital audio broadcasting. A multiplex broadcast receiver for determining whether or not a frequency is included.