JP2001230688A - Character information display method for multiplex broadcasting receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a character information display method, capable of automatic display switching, when a character information program for plural pages is being received. SOLUTION: When received character information is character information for plural pages and presenting function data in the received character information contain data showing batch display, the page scroll of the character information is automatically performed at fixed time intervals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for displaying text information of a multiplex broadcast receiver having a text information display function.

[0002]

2. Description of the Related Art In recent years, FM broadcast stations have multiplexed FM broadcast signals to provide various information such as weather forecasts, news, traffic information, and information linked to broadcast radio programs (eg, music titles of music being broadcast). Information is transmitted as character information. F
The M multiplex broadcast receiver captures the character information and displays the text information on a display unit provided in the FM multiplex broadcast receiver.
Character information transmitted from the M broadcast station can be used.

FIG. 7 is a schematic diagram showing an example of a hierarchical structure of character information (general information level 1) multiplexed on an FM broadcast signal. As shown in FIG. 7, the character information multiplexed on the FM broadcast has a hierarchical structure. In this example, the first
There is a main menu in the hierarchy, and the main menu is linked to submenus A to E in the second hierarchy. In this example, the second hierarchy includes a submenu F that is not linked to the main menu. Submenus BF are programs B1 to B6, C1 to C6, and D1 of the third hierarchy, respectively.
To D3, E1 to E5, and F1 to F5.

FIG. 8 shows an example of a display screen of an FM multiplex broadcast receiver. However, this figure shows general information level 1
6 is a display example in the case of.

[0005] In this case, the FM multiplex broadcast receiver is provided with a key (hereinafter, referred to as a scroll key) defining an operation of moving to the previous or next page in the same hierarchy, although not particularly shown. This scroll key is used to switch the screen display when a screen cannot be displayed on one screen, that is, for displaying a program or a sub-menu covering a plurality of pages. When a program that cannot be displayed is received, the user operates a scroll key to display the next screen or the previous screen, and can view a program covering a plurality of pages.

[0006]

By the way, in recent years, FM
With the spread of multiplex broadcast receivers, the amount of text information transmitted from FM broadcast stations is also increasing. as a result,
The number of textual information programs on multiple pages is increasing.

However, in the conventional FM multiplex broadcasting receiver, in order to display character information over a plurality of pages, it is necessary to press a scroll key to display the next screen or the previous screen, and the operation is complicated. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a multiplex broadcast receiver capable of automatically switching the page display when a character information program covering a plurality of pages is received. To provide a method for displaying multiple character information.

[0009]

In order to solve the above problem, a broadcast signal on which multiplexed data is superimposed is received, multiplexed data is extracted from the received broadcast signal, and character information data included in the multiplexed data is used. In the text information display method of a multiplex broadcast receiver that displays text information on the display unit, it is checked whether there is batch display data indicating that the contents of each page are continuous in the extracted multiplex data. As a result, when there is batch display data, the page is scrolled at a predetermined time interval.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for displaying character information of a multiplex broadcast receiver according to the present invention will be described with reference to FIGS. here,
FIG. 1 is a block diagram showing the configuration of an FM multiplex broadcast receiver for realizing the method for displaying text information of the multiplex broadcast receiver of the present invention, and FIG. 2 is a diagram showing a data format of information which is FM multiplexed and transmitted. FIG. 3 is a diagram showing a configuration of a data group, FIG. 4 is a diagram showing a configuration of data header data, and FIG. 5 is a diagram showing presentation contents included in presentation function data in the data header data. FIG. 6 is a flowchart for explaining the operation of the FM multiplex broadcast receiver according to the present invention.

First, the configuration of an FM multiplex broadcast receiver according to the present invention will be described with reference to FIG. The FM multiplex broadcasting receiver includes an FM receiving unit 1, an intermediate frequency amplification / detection circuit 2, a stereo demodulation circuit 3, an FM multiplex decoding unit 4, a control unit 5, a display unit 6, an operation unit 7, External memory (RAM)
8 and a kanji ROM 9.

The control unit 5 is constituted by a microcomputer, and comprises an operation unit 7, an external memory 8, a kanji R
It is connected to the OM 9, the display unit 6, the FM receiving unit 1, and the FM multiplex decoding unit 4. Although not shown, the operation unit 7 is provided with a “page up” key, a “page down” key, and the like for scrolling the display screen. The control unit 5 sets a reception frequency based on a signal output from the operation unit 7, selects a character information program to be displayed on the display unit 6, and displays the program on the display unit 6 in the external memory 8. Or save character data.

The FM receiver 1 receives an FM broadcast by adjusting the reception frequency to the frequency designated by the controller 5, converts the frequency into an intermediate frequency signal, and outputs the intermediate frequency signal. Intermediate frequency amplification /
The detection circuit 2 amplifies the intermediate frequency signal output from the FM receiver 1 and then performs detection to output an FM detection signal. The stereo demodulation circuit 3 includes the intermediate frequency amplification / detection circuit 2
, Stereo demodulates the FM detection signal output from, and outputs right channel (R) and left channel (L) audio signals. These audio signals are amplified by an amplifier (not shown) and then supplied to a speaker (not shown) for reproduction.

The FM multiplex decoding section 4 has an intermediate frequency amplification /
The FM multiplexed information is extracted from the FM detection signal output from the detection circuit 2 and decoded.

The control unit 5 receives the data decoded by the FM multiplex decoding unit 4, extracts predetermined data, and stores the data in the external memory 8. Then, the control unit 5 controls the external memory 8
The data to be displayed on the display unit 6 is read out from the data stored in the display unit 6 and converted into characters by referring to the kanji ROM 9 and converted into characters.
To be displayed.

In FM multiplex broadcasting, FIG.
As shown in (1), information is transmitted in packet units.
One packet is composed of a 32-bit prefix and a 144-bit data block. The prefix includes a 4-bit service identification code, a 1-bit decoding identification flag, a 1-bit information end flag, a 2-bit update flag, a 14-bit data group number, and a 10-bit data packet number.

Then, as shown in FIG. 3, the data group is composed of a plurality (N) of data blocks.
The data group includes 8-bit SOH (heading start code), 7-bit data group size, 1-bit DGL (data group link code), 8-bit data group size, and 8-bit × n (n is an integer) data. It is composed of group data, NULL data for length adjustment, 8-bit data group end code, and 16-bit CRC (Cyclic Redundancy Code) for error correction.

Here, the data group data is a set of information data such as program management data and page data.
Normally, one data group corresponds to one display unit (one page). The data group data includes an 8-bit RS (information separation code), an 8-bit data header parameter, an arbitrary bit (the number of bits changes according to the content of the data header parameter), and a plurality of data units. It is composed of

FIG. 4 shows an example of the structure of the data header data. The data header data includes program number, content update (presence / absence), total number of pages, presentation function (character or graphic, etc.), information type, and display format (level 1 or level 2).

FIG. 5 shows the types of codes included in the presentation function data included in the data header data and the presentation function. The presentation function data indicates whether the teletext contains characters (b0) or whether it contains graphics (b
1) In addition to whether transparent data is included (b2), whether the teletext is a program that complements the audio broadcast or an independent program (b7), a batch display that determines the display method of this teletext / Non-batch display data (b6).

The batch display / non-batch display data is data that defines the character information display method of the currently received teletext, and when the batch display / non-batch display data is received, F
When the batch display / non-batch display data indicates the non-batch display data (when b6 is 0), the M multiplex broadcast receiver sets F
When the M multiplex broadcast receiver completes the reception of the specific page, the specific page is displayed on the display unit 6, and when the batch display / non-batch display data indicates the batch display data (when b6 is 1), Unless all pages of the program have been received, that is, after all pages of the program have been stored in the external memory 8 shown in FIG.

Next, the operation of the FM multiplex broadcast receiver according to the present invention will be described with reference to the flowchart of FIG.

First, an FM multiplex broadcast signal on which FM multiplex data is superimposed is received (step 101), and FM multiplex data is extracted from the received FM multiplex broadcast signal (step 102). Then, the presentation function data included in the data header data of the extracted FM multiplex data is obtained (step 103). Here, it is checked whether b6 of the acquired presentation function data is 1 or 0 (step 104), and b
If 6 = 1, the page of the received character information program is automatically scrolled, for example, at intervals of 10 seconds (step 105). If b6 = 0 in step 104, the first page is displayed on the display unit 6 without performing automatic page scrolling (step 106), and the process ends.

[0024]

As described above, a broadcast signal on which multiplexed data is superimposed is received, multiplexed data is extracted from the received broadcast signal, and character information is displayed on a display unit using character information data included in the multiplexed data. In the character information display method of the multiplex broadcast receiver to be displayed, it is checked whether or not there is collective display data indicating that the content of each page is continuous in the extracted multiplex data, and as a result of the check, the collective display data is In some cases, pages are scrolled at predetermined time intervals, so users do not need to troublesome page turning for pages with continuous content, improving the operability of the multiplex broadcast receiver Can be done.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an FM multiplex broadcast receiver that realizes a method for displaying text information of the multiplex broadcast receiver according to the present invention.

FIG. 2 is a diagram showing a data format of information transmitted by being FM-multiplexed.

FIG. 3 is a diagram showing a configuration of a data group.

FIG. 4 is a diagram illustrating an example of a configuration of data header data.

FIG. 5 is a diagram showing presentation contents included in presentation function data in data header data.

FIG. 6 is a flowchart for explaining the operation of the FM multiplex broadcast receiver according to the present invention.

FIG. 7 is a schematic diagram showing an example of a hierarchical structure of character information (general information level 1) multiplexed on an FM broadcast signal.

FIG. 8 is a diagram showing an example of a display screen of a conventional FM multiplex broadcast receiver.

[Explanation of symbols]

 Reference Signs List 1 FM receiving unit 2 Intermediate frequency amplification / detection circuit 3 Stereo demodulation circuit 4 FM multiplex decoding unit 5 Control unit 6 Display unit 7 Operation unit 8 External memory 9 Kanji ROM

Claims (1)

[Claims] 1. A multiplex that receives a broadcast signal on which multiplexed data is superimposed, extracts multiplexed data from the received broadcast signal, and displays character information on a display unit using character information data included in the multiplexed data. In the character information display method of a broadcast receiver, it is checked whether there is collective display data indicating that the contents of each page are continuous in the extracted multiplexed data, and as a result of the check, the collective display data is present. A method for displaying character information of a multiplex broadcast receiver, wherein a page is scrolled at a predetermined time interval in a case.