JPH10322293A - Teletext multiplex broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow the user to easily recognize the genre of information by allowing the receiver to have a display element having a display area by two pages of a teletext program, dividing the display area of the display element into a 1st display area and a 2nd display area and displaying contents of items selected from total contents onto the 2nd display area thereby allowing the user to recognize to which item of the total contents teletext information displayed at present corresponds at a glance. SOLUTION: A display area of an LCD 54 is divided into a total contents display area 54M having a size of one page and a current display area 54C having a size of one page similarly. In the case that character data of the total contents are received, the total contents are displayed on the display area 54M of the LCD 54. When the user selects an item among the total contents, the selected item is displayed with inversion as a cursor. In the case that an item '5. Entertainment' is selected among the total contents and decided, the contents of the item '5. Entertainment' are displayed on the current display area 54C while leaving the total contents and the cursor of the display area 54M as they are.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a teletext receiver.

[0002]

2. Description of the Related Art In FM broadcasting, called "FM text multiplex broadcasting", digital data such as character information is frequency-multiplexed and transmitted to an original audio broadcast program.

[0003] This FM teletext broadcasting is called the DARC system, and the standard for multiplexing digital data such as text information is a subcarrier frequency: 76 kHz Transmission rate: 16 kbit / s Modulation system: LMSK error correction system : (272,190) This is a product code using a shortened difference set cyclic code.

Then, the LMSK signal is frequency-multiplexed with an audio signal (monaural signal or stereo composite signal) of an original audio broadcast program, and the frequency-multiplexed signal is transmitted.

[0005] In addition, program services such as character information include:
There is a distinction between levels 1, 2, and 3, which all display (present) character information and the like by dot display. As shown in FIG. 5A, the level 1 program service is a service for an FM receiver capable of displaying 15.5 characters × 2.5 lines including a header portion, and information is characters. One text program has a maximum size of 62 pages, and one page is 15.5 characters × 2 lines.

[0006] As the level 1 program service, news, weather forecast, traffic information, entertainment and main supplementary programs are considered. In this case, entertainment includes fortune-telling, listener message boards,
It provides quizzes and town information.

The main complementary programs are, for example, when the original audio broadcast is a music program, such as the title of the music, the name of the performer, and the telephone number and FAX number at the time of the request.
It provides complementary information of the original audio broadcast program. Further, as a program service other than the above, urgent information provided as needed when there is an urgent need is also considered.

[0008] The level 2 program service is a service for an FM receiver capable of displaying 15.5 characters x 8.5 lines including a header portion, and the information is characters and graphics. The level 3 program service is an FM receiver capable of displaying a detailed map on a CD-ROM or the like, that is, a traffic information service for a navigation system.

[0009] The FM teletext receiver corresponding to level 1 is provided with a display element DSP such as an LCD as shown in FIG.
The size is 15.5 characters x 2.5 lines (248 horizontal dots x 40 vertical dots). However, of the display area, the upper 0.5
The line area is used as a display area for a header sentence, and the lower two line areas are used as a display area for a text.

[0010] Then, when the receiver receives the teletext, the first page of the total table of contents is displayed on the display element as shown in FIG. 5B. When a predetermined key operation is performed while the first page is displayed as described above, the second page of the total table of contents is displayed as shown in FIG. It is displayed in order.

In this general table of contents, programs are prepared in a hierarchical manner. For example, when "3. Weather forecast" is selected from the general table of contents in FIG. 5C, as shown in FIG. The table of contents "1. today's weather" and "2. tomorrow's weather" in the program are displayed.

[0012] For example, when "2. Tomorrow's weather" is selected, as shown in Fig. 5E, the first page of a lower-order program, "Tokyo (tomorrow) weather forecast" is displayed. Then, when the second page is selected in this state, "Tomorrow's weather forecast of Kanagawa" is displayed as shown in FIG. 5F.

In this way, since the program and the table of contents are prepared in a hierarchical manner in the general table of contents, a target character program can be displayed by sequentially following the programs and the table of contents.

[0014]

As described above, in FM text multiplex broadcasting, the title of the currently displayed page (body) is displayed as a header. As shown in FIG. Is 0.5 lines high and the header is displayed in quarter-byte characters, making it very hard to see.

[0015] Further, when the hierarchy becomes deeper, it may not be possible to judge from which item of the total table of contents the displayed page is selected by the header alone. further,
While data is being received, it cannot be determined whether data of the total table of contents is being received or data of the selected item of the general table of contents is being received.

The present invention is to solve the above problems.

[0017]

For this reason, according to the present invention, data of a text program is multiplexed with a signal of an original audio broadcast program, and a text multiplex broadcast in which the multiplex signal is broadcast is received. A receiver for receiving the text multiplex broadcast and outputting the data of the text program, and a display element having a display area for at least two pages of the text program; To
Dividing into a first display area and a second display area,
Displays the table of contents of the text program in the display area of
The text multiplex broadcast receiver is adapted to display the contents of the item selected from the general table of contents in the second display area while displaying the general table of contents of the teletext program in the display area of. Therefore, the genre to which the content displayed in the second display area belongs is displayed in the first display area.

[0018]

FIG. 1 shows a case where the present invention is applied to a unit-type car audio system. In FIG. 1, reference numerals 10, 20, 30, and 40 indicate various slave units, and reference numeral 50 indicates a master control unit. These units 10 to 50 are interconnected through a system bus 90. .

In this case, the system bus 90 includes a power supply line 91 for supplying an operating voltage to each unit, a video signal line 92 for accessing a video signal, and an audio signal line 93 for accessing an audio signal.
And a computer line 94 for accessing microcomputer data, addresses and control signals.

The unit 10 is a receiving unit for FM text multiplex broadcasting. The unit 10 includes a receiving circuit 11 which is configured in a synthesizer system and receives FM broadcasting, and a microcomputer 12 for controlling the same. And
At the time of receiving the FM teletext, the receiving circuit 11 extracts the audio signal of the broadcast and the text data of the text program. Processing such as channel selection of the receiving circuit 11 is controlled by the microcomputer 12.

Therefore, the operating voltage is supplied to the receiving unit 10 through the power supply line 91 of the system bus 90, the receiving circuit 11 is connected to the signal lines 91 and 94, and the microcomputer 12 is connected to the signal line 94. .

The unit 20 is a television broadcast receiving unit. The unit 20 includes a receiving circuit 21 which is configured in a synthesizer system and receives television broadcasts, and a microcomputer 22 for controlling the same. When receiving a television broadcast, a video signal and an audio signal of the television broadcast are extracted from the receiving circuit 21. Processing such as channel selection of the receiving circuit 21 is controlled by the microcomputer 22.

Therefore, the operating voltage is supplied to the receiving unit 20 through the power supply line 91 of the system bus 90, the receiving circuit 21 is connected to the signal lines 92 and 93, and the microcomputer 22 is connected to the signal line 94. .

Further, the unit 30 is a unit of a CD player, and the player unit 30 has a CD reproducing circuit (and a reproducing mechanism) 31 and a microcomputer 32. Then, the reproduction circuit 31 is controlled by the microcomputer 32 to execute the reproduction of the CD,
In the playback mode, the audio signal is extracted.

The power supply line 9 of the system bus 90
1, an operating voltage is supplied to the player unit 30, the reproducing circuit 31 is connected to the signal line 92, and the microcomputer 32 is connected to the signal line 94.

The unit 40 is a unit of a pre-main amplifier. The amplifier unit 40 includes a signal circuit 41 that performs processes such as tone control, equalizing, volume adjustment, and power amplification on the audio signal supplied thereto, and a microcomputer 42 for controlling the signal circuit 41.

The input terminal of the signal circuit 41 is connected to the signal line 93 of the system bus 90, and the output terminal is connected to the left and right channel speakers 4L and 4R mounted on the automobile.

Further, the amplifier unit 40 includes a power supply circuit 4
The output voltage is supplied to the unit 40 itself, and is supplied to each of the units 10 to 30 and 50 through the power supply line 91 of the system bus 90 as their operation voltage.

Further, the unit 50 includes units 10 to
It is a master unit for controlling the unit 40 and also for key input and image display. Therefore, the master unit 50 has a display circuit 51, a microcomputer 52 for controlling the display circuit 51, and a microcomputer 53 for master control.

The display circuit 51 is connected to the system bus 90.
, And a color LCD 54 is connected as a display element. In this case, L
The CD 54 is a full dot matrix system that displays characters and the like in color by combining dots. For example, as shown in FIG. 2A, the display area has a size of 320 dots wide by 234 dots high corresponding to a television broadcast. ing.

The microcomputer 53 is connected to various operation keys 55 and to a signal line 94 of a system bus 90.

Although not shown, in the case where a navigation unit or a cassette tape deck unit is used, those units are units 10 to 3.
0 is connected to the system bus 90 as well.

In such a configuration, for example, the key 55
Is operated, the command for enabling the receiving unit 10 is supplied from the microcomputer 53 to the microcomputer 12 through the signal line 94, and as a result, the audio signal is transmitted from the receiving circuit 11 to the microcomputer 12. The audio signal is output and supplied to the signal circuit 41 of the unit 40 through the signal line 93. Therefore, the audio of the FM broadcast is output from the speakers 4L and 4R.

At this time, a command corresponding to the operation of the key 55 is supplied from the microcomputer 53 to the microcomputer 42 through the signal line 94 to control the characteristics of the signal circuit 41 and control the tone control and the volume. .

When a channel selection operation is performed by the key 55, the microcomputer 53 sends a signal line 94 to the signal line 94.
The microcomputer 12 controls the receiving circuit 11 to select a broadcasting station having a desired frequency.

Further, at the time of receiving FM teletext broadcasting,
Character data is output from the receiving circuit 11, and the character data is supplied to the display circuit 51 through the signal line 94. Then, when a key operation for selecting a character program is performed by the key 55, the character program is displayed on the LCD.

In this case, especially in the present invention, the text program is displayed as shown in FIGS. 2 to 4, for example. That is, as shown in FIG. 5A, one page of a text program is 15.5 characters × 2.5 lines (248 dots wide × 40 dots high).
However, as shown in FIG. 2, the size of the display area of the LCD 54 is 320 dots × 234 dots, so if one character is displayed at 16 dots × 16 dots, Will display 20 characters x 14.6 lines of characters.

Therefore, for example, as shown in FIG.
The display area 54 is divided into, for example, a total table of contents display area 54M having a size of one page and a current display area 54C having a size of one page.

When the character data of the total table of contents is received, the total table of contents is displayed on the display area 54M of the LCD 54, for example, as shown in FIG. 2A. When an item (lower-level table of contents or a program) is selected from the total table of contents, the selected item is highlighted with a cursor, and it is notified that the item at the cursor position is the target of the next selection. Is done.

As described above, for example, in FIG.
2A, when “5. Entertainment” is selected and determined, for example, as shown in FIG. 2B, “5. Entertainment” is displayed in the current display area 54C while leaving the entire table of contents and the cursor of the display area 54M. Display the contents (program) of "Entertainment".

That is, when displaying a text program,
When the total table of contents is displayed in the display area 54M, and a lower table of contents or a program is selected from the total table of contents, the selected table of contents is displayed in the current display area 54C while leaving the total table of contents and the cursor in the display area 54M. The lower-level table of contents or program is displayed.

When a broadcast station for teletext broadcasting has just been selected and the total table of contents cannot be displayed, or during a period in which it is checked whether the currently receiving broadcasting station is performing teletext broadcasting, That is, when the character data of the total table of contents has not been received, a sentence or a character string indicating that the general table of contents is being received is displayed in the total table of contents display area 54M, for example, as shown in FIG.

Further, when a lower-level table of contents or a program is selected from the total table of contents, but the lower-level table of contents or the page of the program has not been received yet, for example, as shown in FIG. Displays a sentence or character string indicating that the target page is being received.

In this manner, in this teletext receiver, the display area of LCD 54 is divided into display area 54M and display area 54C, and a total table of contents and a cursor are displayed in display area 54M. , Character information of the selected item is displayed. Therefore,
At a glance, it is possible to know at a glance which item in the total table of contents the currently displayed character information is, and the genre of the displayed information can be immediately known.

Also, since the header is displayed in a small size, in a vehicle-mounted receiver, confirmation of the header information involves danger.
In the above-mentioned receiver, since the genre of the character information displayed in the current display area 54C can be known by looking at the total table of contents area 54M, that is, since the header is displayed large, Even in the case of an in-vehicle receiver, it is safe.

Further, when the character data of the general table of contents or the target page has not been received, the character data is displayed in a sentence or a character string, so that the reception status of the character program can be easily understood. In addition, since a character program is displayed on the LCD 54 which is also used for displaying a television broadcast or the like,
The total table of contents display area 54M and the current display area 54C can be secured, and the display can be performed in a well-balanced manner.

[0047]

According to the present invention, it is possible to know at a glance which item in the total table of contents the currently displayed character information is, and to immediately know the genre of the displayed information. Further, even in the case of an in-vehicle receiver, the contents of the header can be easily and safely known.

Further, when the character data of the general table of contents or the target page has not been received, it is displayed in a sentence or a character string, so that the reception status of the character program can be easily understood. Further, the display can be performed in a well-balanced manner.

[Brief description of the drawings]

FIG. 1 is a system diagram illustrating one embodiment of the present invention.

FIG. 2 is a diagram for explaining the present invention.

FIG. 3 is a diagram for explaining the present invention.

FIG. 4 is a diagram for explaining the present invention.

FIG. 5 is a diagram for explaining the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... FM receiving unit, 11 ... Receiving circuit, 12 ... Microcomputer, 20 ... TV receiving unit, 21 ...
Receiving circuit, 22: microcomputer, 30: CD player unit, 31: reproducing circuit, 32: microcomputer, 40: amplifier unit, 41: signal circuit, 4
2 microcomputer, 43 power supply circuit, 50 master unit, 51 display circuit, 52 and 53 microcomputer, 54 LCD, 54C current display area, 54M total table of contents display area, 55 operation keys, 9
0 ... System bus

Claims (2)

[Claims] 1. A receiver for multiplexing text program data into an original audio broadcast program signal and receiving a text multiplex broadcast adapted to broadcast the multiplexed signal. A receiving circuit that outputs data of the text program; and a display element having a display area for at least two pages of the text program. The display area of the display element is divided into a first display area and a second display. And displaying the total table of contents of the text program in the first display area. The total table of contents of the text program is displayed in the first display area while the total table of contents of the text program is displayed in the second display area. A teletext receiver that displays the contents of an item selected from the table of contents. 2. The text multiplex broadcast receiver according to claim 1, wherein the text data displayed as the general table of contents is received.
A sentence or character string indicating this is displayed in the first display area, and while receiving the character data of the item selected from the table of contents, the sentence or character string indicating this is displayed on the second display area. Teletext multiplex broadcasting receiver that is displayed in the area.