JP2001267945A - Multiplex broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of a conventional multiplex broadcast receiver that the receiver fails to capture data relating to an audio service during reception of the audio service. SOLUTION: The multiplex broadcast receiver of this invention has a DAB tuner section 12 that receives a DAB broadcast signal resulting from multiplexing a PAD used to send a data service (1st data) relating to the audio service with a packet used to send a data service (2nd data) not related to the audio service, a DAB decoder section 14 and an MPEG decoder section 15 that extract the 1st and 2nd data in the DAB broadcast signal during reception, a display section 19 that outputs the 1st and 2nd data extracted by the DAB decoder section 14 and the MPEG decoder section 15 for display and a CPU 20 that outputs with priority the 1st data to the display section 19 for display out of the 1st ad 2nd data of the DAB broadcast signal during the reception.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to digital audio broadcasting (hereinafter referred to simply as DAB).
The present invention relates to a multiplex broadcast receiving apparatus such as a DAB receiver having a function of extracting multiplexed data multiplexed into a broadcast and outputting the multiplexed data.

[0002]

2. Description of the Related Art Generally, digital audio broadcasting (hereinafter, simply referred to as DAB) broadcasting is
In addition to the voice service, a data service is provided as multiplexed data including text and image information.

As such a data service, MOT
(Multimedia Object Transfer) There is an object called an object. The MOT object is data that handles multimedia contents such as images, moving images, characters, and HTML files.

[0004] As a method of transmitting the MOT object as a data service to a multiplex broadcast signal of DAB broadcast, there are two types of a method of transmitting the program-related information (hereinafter, simply referred to as PAD) and a method of transmitting the packet. is there.

[0005] The PAD is arranged at the end of a DAB audio frame including audio information in a transmission frame of a multiplex broadcast signal, and is basically designed to transmit only data related to an audio service. It should be noted that the data related to such an audio service is not the audio program itself, but information associated with the audio program itself, such as data such as a weather map in a weather forecast program by voice and a simple peripheral map in parking lot information. . Therefore, data related to such a voice service is not always transmitted, but is transmitted only when such data exists. Therefore, the data is transmitted by PAD.

[0006] On the other hand, a packet is for transmitting a data program itself. The data program is divided into blocks called packets of a fixed size, and a plurality of blocks are divided into several blocks. Is transmitted. Therefore, there is a simple WEB realized by transmitting an HTML file.

In a DAB receiver for receiving such a DAB broadcast, a PA in a transmission frame of a multiplex broadcast signal is used.
Select either D or Packet and select the selected P
The MOT object transmitted by AD or Packet is extracted, and by decoding this MOT object, the decoded content is displayed on the display unit.

[0008] Therefore, in the DAB receiver, when a voice service is being received, it is desirable to display the decoded contents of the MOT object transmitted by the PAD related to the voice service on the display unit.

[0009]

However, according to a conventional DAB receiver, for example, during reception of a voice service,
When the packet side is selected, since the MOT object transmitted by the packet is being acquired, the PAD transmitting the MOT object related to the voice service currently being received exists. There was a problem that the MOT object related to the voice service could not be obtained, and the user missed the data related to the voice service.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a multiplex broadcast in which data related to the voice service is preferentially output during reception of the voice service. A receiving device is provided.

[0011]

In order to achieve the above object, a multiplex broadcast receiving apparatus according to the present invention comprises a first data related to a voice service and a second data not related to the voice service.
Receiving means for receiving a multiplex broadcast signal obtained by multiplexing data; data extracting means for extracting the first data and second data from the multiplex broadcast signal being received by the receiving means; And a data output unit for outputting the first data and the second data extracted by the multiplex broadcast receiving apparatus. Determining means, when it is determined that the multiplex broadcast signal related to the audio service is received, the first data and the second data related to the multiplex broadcast signal being received;
Control means for controlling the data output means so as to output the first data preferentially.

Therefore, according to the multiplex broadcast receiving apparatus of the present invention, during the reception of the multiplex broadcast signal related to the audio service, the first data and the second data related to the multiplex broadcast signal during the reception are used. Since the data is preferentially output, data related to the voice service can be reliably output without being missed.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A DAB receiver showing an embodiment in a multiplex broadcast receiving apparatus of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration inside the DAB receiver shown in the present embodiment.

A DAB receiver 10 shown in FIG. 1 includes a receiving antenna 11 for receiving a DAB broadcast,
1 and a DAB tuner section 12 for tuning the DAB broadcast received by the DAB tuner section 12.
A / D converter 13 for digitally converting B broadcast, and DAB decoder 14 for decoding a DAB frame as multiplexed data from the digitally converted DAB broadcast
An MPEG decoder 15 for extracting an audio service from the DAB frame, a D / A converter 16 for converting the audio service into an analog signal, a speaker 17 for outputting the analog-converted audio signal as a sound, and a DAB. The DAB receiver 10 includes an operation unit 18 for inputting a command related to the receiver 10, a display unit 19 for displaying decoding contents, and a CPU 20 for controlling the entire DAB receiver 10.

The display section 19 has an indicator 19a which can be lit and displayed.

The operation unit 18 performs a selection operation to obtain a data service transmitted by the PAD.
A D mode and a packet mode for acquiring a data service transmitted in a packet can be selected.

In the PAD mode, the CPU 20 obtains and decodes a data service transmitted by the PAD through the MPEG decoder section 15 and outputs the decoded content to the display section 19 for display.

Further, during the packet mode, the CPU 20 sends the packet through the DAB decoder unit 14 to the packet.
It acquires and decodes a data service transmitted by et, and outputs the decoded content to the display unit 19 for display.

The receiving means is a DAB tuner unit 12, the data extracting means is a DAB decoder unit 14 and an MPEG decoder unit 15, and the data output means is a display unit 1.
9. The determination means and the control means correspond to the CPU 20.

Next, DAB receiver 10 shown in the present embodiment
The operation of will be described. FIG. 2 shows D
CPU 2 involved in PAD priority selection processing of AB receiver 10
11 is a flowchart illustrating a processing operation of a zero.

The PAD priority selection process shown in FIG. 2 is a process in which when a voice service is being received, the data service in the PAD is preferentially acquired, and the decoded content of the data service is displayed on the display unit 19. It is.

The CPU 20 shown in FIG. 2 determines whether or not the voice service is currently being received (step S1).
1). If it is determined that the voice service is currently being received, it is determined whether there is a receivable data service (step S12).

If there is a receivable data service, it is determined whether there is a receivable data service transmitted by the PAD (step S13). PA
If there is a receivable data service transmitted by D, a MOT object related to the data service transmitted by the PAD, for example, a voice service, is decoded, and the decoded content is displayed and output on the display unit 19 ( In step S14, it is determined whether the voice service receiving operation is ongoing (step S15).

If the voice service receiving operation is ongoing,
Move to step S11. If the voice service receiving operation is not being continued, this processing operation ends.

If it is determined in step S13 that there is no receivable data service transmitted by PAD, it is determined whether there is a receivable data service transmitted by Packet (step S16).

If there is a receivable data service transmitted by the Packet, a data service transmitted by the Packet, for example, an MOT object not related to the voice service is decoded, and the decoded content is displayed as Packet data on the display unit 19. Is displayed (step S17), and the process proceeds to step S15.

If no voice service is being received in step S11, if there is no receivable data service in step S12, Pa
If there is no receivable data service transmitted by the ticket, the process proceeds to step S11.

According to the DAB receiver 10 shown in the present embodiment, when the voice service is being received, the data service transmitted by the PAD is preferentially acquired, and the decoded content of the data service is displayed on the display unit 19. Since the display is performed, the data service related to the voice service can be reliably provided to the user.

Further, DAB receiver 1 shown in the present embodiment
According to the PAD priority selection process of 0, as shown in FIG.
Regardless of which of the PAD mode and the Packet mode is selected, if the PAD data service can be received during the voice service reception, the PAD
Since the data service transmitted by the voice service is preferentially acquired, it is very effective in preventing data related to the voice service from being missed.

However, in the PAD priority selection process shown in FIG. 2, if the voice service is being received, even if the PAD data service is in a receivable state even in the Packet mode, the PAD transmission is performed. The data service to be acquired is preferentially acquired, and the display content of the display unit 19 is automatically switched.
This display switching may cause a problem for the user.

To cope with such a situation, the following PAD priority selection processing is considered. FIG. 3 is a flowchart showing the processing operation of CPU 20 relating to the PAD priority selection processing of DAB receiver 10 shown in the present embodiment.

The CPU 20 shown in FIG. 3 determines whether a voice service is currently being received (step S2).
1). If the voice service is being received, it is determined whether there is a receivable data service (step S2).
2).

If there is a receivable data service, it is determined whether there is a receivable data service transmitted by the PAD (step S23). PA
If there is a receivable data service transmitted by D, it is determined whether the mode is the PAD mode (step S24).

In the PAD mode, an MO associated with a data service transmitted by the PAD, for example, a voice service is provided.
By decoding the T object, the decoded content is displayed and output on the display unit 19 (step S25), and it is determined whether or not to continue the voice service receiving operation (step S26).

If the voice service receiving operation is to be continued, the process proceeds to step S21. If the voice service receiving operation is not to be continued, the processing operation ends.

If there is no receivable data service transmitted by PAD in step S23, Pa
It is determined whether or not there is a receivable data service transmitted by ticket (step S27).

If there is a receivable data service transmitted by the packet, the MOT object not related to the data service transmitted by the packet, for example, the voice service, is decoded, and the decoded contents are displayed on the display unit 19. (Step S2)
8) The process proceeds to step S26.

If the mode is not the PAD mode in step S24, it is determined whether or not the mode is the packet mode (step S29).

In the case of the Packet mode, this Pac
By decoding the data service transmitted by “ket”, the decoded contents are displayed and output on the display unit 19 (step S30), and the display unit 19 is notified to notify that the PAD data service can be received. The placed indicator 19a is turned on (step S31), and the process proceeds to step S26.

If the voice service is being received in step S21, or if the packet
If there is no receivable data service transmitted in step S29, or if it is not the packet mode in step S29, the process proceeds to step S11.

According to the PAD priority selection process shown in FIG.
If the voice service is being received in the PAD mode, the PAD
In addition to acquiring the data service to be transmitted with priority and displaying the decoded content of the data service on the display unit 19, when the voice service is being received in the packet mode, the data service is transmitted by the packet. While displaying the decoded contents of the data service on the display unit 19, the indicator 19a is lit to display that the PAD data service is also receivable, so that the user does not feel inconvenience and A situation in which data related to the voice service is missed can be prevented.

[0042]

According to the multiplex broadcast receiving apparatus of the present invention configured as described above, during reception of the multiplex broadcast signal related to the audio service, the first data and the first data related to the multiplex broadcast signal being received are received. Since the first data of the two data is preferentially output, data related to the voice service can be reliably output without being missed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration inside a DAB receiver showing an embodiment in a multiplex broadcast receiving apparatus of the present invention.

FIG. 2 is a flowchart showing a processing operation of a CPU relating to a PAD priority selection process of the DAB receiver shown in the present embodiment.

FIG. 3 is a flowchart showing a processing operation of a CPU relating to a PAD priority selection process of the DAB receiver shown in the present embodiment.

[Explanation of symbols]

 Reference Signs List 10 DAB receiver (multiplex broadcast receiving apparatus) 12 DAB tuner section (receiving means) 14 DAB decoder section (data extracting means) 15 MPEG decoder section (data extracting means) 19 display section (data outputting means) 20 CPU (determining means, Control means)

Claims (1)

[Claims] 1. A receiving means for receiving a multiplex broadcast signal obtained by multiplexing first data related to a voice service and second data not related to the voice service, and receiving a multiplex broadcast signal being received by the receiving means. A multiplex broadcast receiving apparatus comprising: a data extracting means for extracting the first data and the second data; and a data output means for outputting the first data and the second data extracted by the data extracting means. A determining means for determining whether or not the receiving means has received a multiplex broadcast signal related to an audio service; and if the determining means determines that a multiplex broadcast signal related to an audio service has been received, Control means for controlling the data output means so as to preferentially output the first data among the first data and the second data relating to the multiplex broadcast signal being received; Multiplex broadcast receiving apparatus according to claim.