JPH08228162A - Receiving machine - Google Patents

Abstract

PURPOSE: To identifiably display information received in real time and stored information at the receiver of FM teletext multiplex broadcasting. CONSTITUTION: This device is provided with a circuit 33 for receiving teletext broadcasting and a memory 14 for storing character data received by this reception circuit. A display element 40 is provided to selectively display the characters of received character data and the characters of character data extracted from the memory. The display state is changed at the time of displaying the characters of the received character data and at the time of displaying the characters of character data extracted from the memory.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver for receiving multiple broadcasts such as characters.

[0002]

2. Description of the Related Art In conventional radio broadcasting, only audio signals intended for listening are sent, and information that cannot be heard is not sent. Therefore, no such information was displayed, stored, or recalled.

In Europe, a service called RDS is carried out and data is sent together with the original program (audio information), but the data is limited to the broadcasting station name and the identification code of the program. ing. Therefore, there was no need to store or recall such data.

However, a technique called "FM character multiplex broadcasting" has come to be realized in FM broadcasting, in which data such as characters is multiplexed and transmitted together with the original program.

[0005] As the FM character multiplex broadcasting program, for example, as shown in the middle column of Fig. 11, news, weather forecast, traffic information, program-linked entertainment, etc. are considered.

In this case, as shown in the right column of FIG. 11, news, weather forecasts, and traffic information have, for example, 15 pages per page.
Characters x 2 lines, each with a size of 20 to 30 pages, and divided into 6 types at the maximum. In addition, one page is also generally one screen for display.

If the broadcast content is, for example, a music program, the program link is supplementary information such as the title of the song, the performer's name, and the telephone number at the time of request. Furthermore, entertainment is interactive such as fortune telling, listener message boards, quizzes, and town information.

In the FM character multiplex broadcasting, synchronization data, error correction data, etc. are added to the above-mentioned data, and this is frequency-multiplexed with the main audio signal and sent. .

In this case, the character data is JIS
It is supposed that the character to be displayed is specified by the code. The data multiplexing standard is as follows: subcarrier frequency: 76 kHz Transmission speed: 16 kbit / sec Modulation method: LMSK (76 when data is "1")
When the data of kHz + 4 kHz is "0", it is 76 kHz-4 kHz).

[0010]

[Problems to be Solved by the Invention] FM character multiplex broadcasting is
Since the data is sent serially in the standard or format as described above, when displaying news or weather forecast on the receiver that receives the FM multiplex broadcast, (1) the data being broadcast is real-time. indicate. (2) Store the broadcast data in memory and recall and display it when necessary. There are two cases.

However, the display according to item (1) or (2)
When the items are displayed, it may not be known whether the displayed information is the currently broadcasted real-time information or the past information called from the memory.

The present invention is intended to solve such a problem.

[0013]

Therefore, in the present invention, a circuit for receiving character multiplex broadcasting, a memory for storing character data received by the receiving circuit,
A display element for selectively displaying a character based on the received character data and a character based on the character data retrieved from the memory, and displaying the character based on the received character data; and the memory. The display state is changed when displaying the characters based on the character data extracted from the receiver.

[0014]

[Operation] The display state changes between the display of real-time information and the display of information called from the memory.
The user is visually informed whether the display is information displayed from the memory.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a signal system when the present invention is applied to an on-vehicle FM receiver. That is, the FM signal received by the antenna 1 is supplied to the tuner circuit 2 to select a broadcasting station having a target frequency, the FM signal is converted into an intermediate frequency signal, and the intermediate frequency signal is converted into an intermediate frequency signal. It is supplied to the FM demodulation circuit 4 through the frequency amplifier 3.

In this way, from the demodulation circuit 4, a summed signal (L + R) of the stereo left and right channel audio signals L and R, a DSB signal balanced-balanced by the difference signal (LR), and a pilot signal. And the FM mentioned above
The frequency multiplexed signal with the LMSK signal in the character multiplex broadcasting is taken out.

Then, this frequency-multiplexed signal is supplied to the stereo demodulation circuit 5 and added signals (L + R) and D are added.
Audio signals L and R are demodulated from the SB signal, and these signals L and R are supplied to left and right channel speakers 7L and 7R through amplifiers 6L and 6R.

In this case, a microcomputer 10 is provided for selecting a channel in the tuner circuit 2 and displaying characters by FM character multiplex broadcasting described later.

That is, this microcomputer 10
Is a CPU 11 for processing a program, a ROM 12 in which the program is written, and an R for a work area and a reception buffer for FM character multiplex broadcasting data.
It has an AM 13 and a memory 14.

In this case, the memory 14 stores the character code of the data transmitted by the FM character multiplex broadcasting, and has, for example, three storage areas, and each storage area has one screen ( The data (character code) of two lines) can be stored respectively. The memories 12 to 14 are connected to the CPU 11 via the system bus 19.

Further, interface circuits (ports) 15 to 18 are connected to the bus 19, and the tuning data is supplied from the interface circuit 15 to the tuner circuit 2 to execute the tuning. Further, the demodulated signal from the demodulation circuit 4 is supplied to the decoder 31, and the data in the FM character multiplex broadcasting, that is, the character code data is decoded and taken out from the LMSK signal.

Then, this data is taken into the microcomputer 10 through the interface circuit 16 and written in the reception buffer area of the memory 13. In this case, the data is written so that the reception buffer area is always updated with the latest data.

Further, various operation keys 32 are connected to the interface circuit 17, and the key outputs thereof are fetched into the microcomputer 10. Furthermore, the interface circuit 18 is connected to a remote control receiving circuit 33. In this example, since the remote controller is of infrared type, the receiving circuit 33 has a light receiving element for receiving infrared rays from the transmitter 50 of the remote controller and a decoder for decoding the remote control signal from this light receiving element.

Further, a display controller 21 is connected to the bus 19, and a RAM 22 for display and a font for converting character codes sent by FM character multiplex broadcasting to the controller 21 into a signal for display. Memory with data (character generator) 2
3 is connected, and an LCD 40 is connected as a display element in this example.

As shown in FIG. 2A, for example, the LCD 40 has a horizontally long rectangular display area 41 as shown in FIG. 2A, and this area 41 displays 48 dots (vertical) × 256 dots (horizontal). It is composed of dots. Then, one double-byte character (including spaces between characters and spaces between lines) is 16 dots (horizontal) ×
It is composed of 20 dots (vertical). Further, as shown in FIG. 2C, in the area 41, the lower left 15 characters (horizontal) × 2
The row (vertical) area 42 is used for the main display, and the remaining L
The letter-shaped area 43 is used for displaying subheadings and the like.

Half-width characters are displayed in a size of 8 dots (horizontal) × 20 dots (vertical), and quarter-size characters are displayed in a size of 8 dots (horizontal) × 10 dots (vertical). Also,
The controller 21 controls the LCD under the control of the CPU 11.
The display of 40 can be switched between a normal display mode in which black characters are displayed on a white background and a reverse display mode in which white characters are displayed on a black background.

Then, from the CPU 11 to the controller 21
When the character code is supplied to, the character code is written in the memory 22 by the controller 21. Further, the character code written in the memory 22 is repeatedly read by the controller 21 at a predetermined cycle, converted into a display signal by the font data in the memory 23, and the display signal is supplied to the LCD 40. A character corresponding to the character code written in the memory 22 is displayed in the area 41.

Further, FIG. 3 shows an example of a front panel of the FM receiver, and LC is provided at the center of the front panel.
D40 is provided. Further, the front panel is provided with a knob 6 for volume adjustment and an operation key 32. In this example, the provided keys 32 are made to be the minimum necessary. For example, the channel selection scan key 32S and the display mode switching are provided. Only the key 32C, the memory key 32M, etc. are provided.

In this example, the other operation keys are, for example, as shown in FIG.
It is set to 0. That is, the transmitter 50 has an item key 51 for switching the displayed item, a page key 52 for designating a page in the switched item, and the memory 14.
Memory call keys 531 to 53 for selecting and displaying the data respectively stored in the three storage areas
3, Enter key 5 to instruct the execution or execution of key input
4 and the like are provided.

When any of the keys 51 to 54 is pressed, data corresponding to the pressed key is formed, which is converted into infrared rays and transmitted to the receiver. Then, in the receiver, the infrared data transmitted from the transmitter 50 is received by the receiving circuit 33, and the original data is taken out, and this data is supplied to the microcomputer 10.

In such a configuration, when the character display by FM character multiplex broadcasting is not instructed, the data regarding the broadcasting station currently being received, for example, the character data indicating the frequency is formed, and this data is formed by the controller. It is supplied to 21 and written in the memory 22, and the frequency is digitally displayed on the LCD 40.

On the other hand, when displaying characters in the FM character multiplex broadcasting, the item key 51 of the transmitter 50 is pressed.

Then, the data indicating that the key 51 has been pressed is transmitted from the transmitter 50 to the receiving circuit 33, and the transmitted data is supplied from the receiving circuit 33 to the microcomputer 10. As a result, predetermined display data is formed by the CPU 11 and supplied to the controller 21, and characters or symbols indicating the display mode are sequentially displayed on the LCD 40 each time the item key 51 is pressed.

Then, when the display mode of the FM character multiplex broadcasting is displayed, when the enter key 54 is pressed, the display mode of the FM character multiplex broadcasting is confirmed by this, and a menu showing the type of program is displayed. It is displayed on the LCD 40.

Then, when the item key 51 is further pressed,
Each time the button is pressed, the program name is displayed in order, so when the desired program name, for example, "program link" is displayed, the enter key 54 is pressed.

Then, the program having the program name displayed when the enter key 54 is pressed, in this case, "program-linked"
Is selected, this program-interlocked data is sequentially supplied from the RAM 13 to the controller 21, and C
The display mode of the controller is controlled by PU11,
The LCD 40 is in the normal display mode.

Therefore, the LCD 40 has, for example, FIG.
As shown in A, the characters in the currently sent “program-linked” are displayed in real time, and the characters are normally displayed in black on a white background.

Then, when the enter key 54 is pressed while the characters currently being broadcast are displayed in real time, the data (character code) of the displayed characters is changed to 3 in the memory 14. It is stored in the area in which the oldest data is stored among the two storage areas.

When data is stored in the memory 14 in this way, when one of the memory call keys 531 to 533 is pressed, the memory call key pressed in the three memory areas of the memory 14 is pressed. The data stored therein is read out from the corresponding area, this data is supplied to the controller 21, and the CPU
The display mode of the controller is controlled by 11 and LC
D40 is set to the reverse display mode.

Therefore, the LCD 40 is shown in FIG.
As shown in B, the character of the data stored in the area corresponding to the pressed memory call key in the memory 14 is displayed, and the character is reversely displayed in white on a black background.

In this way, according to this receiver, when the characters currently being broadcast are displayed, the normal display is performed, and when the characters stored in the memory 14 are displayed, the reverse display is performed, so that the characters are displayed. It is possible to easily know whether the character is real-time information currently being broadcast or past information called from the memory 14.

Moreover, since the normal display and the reverse display can be used to identify whether the information is currently being broadcast or stored, the configuration for the identification is simple. Moreover, since the display state of the displayed information itself changes, there is no misunderstanding.

FIG. 6 shows another example of the present invention. Then, in this example, when displaying the information currently being broadcast, as shown in FIG. 6A, the information is displayed normally, and when displaying the information stored in the memory 14, As shown in FIG. 6B, the information is normally displayed and the periphery of the display area 41 is reversely displayed in a frame shape.

Further, in the example shown in FIG. 7, the LCD 4
Marks 44 and 45 configured similarly to the display dots are provided in a part of the display area 41 of 0. Then, when displaying the information currently being broadcast, as shown in FIG. 7A,
The information is displayed normally and the mark 44 is displayed.
Is displayed. When displaying the information stored in the memory 14, the information is displayed normally and the mark 45 is displayed as shown in FIG. 7B.

Further, in the example shown in FIG. 8, the LCD
A mark 46 configured similarly to a display dot is provided in a part of the display area 41 of 40. Then, when the information currently being broadcast is displayed, the information is displayed normally and the mark 46 is displayed blinking as shown in FIG. 8A. Further, when the information stored in the memory 14 is displayed, the information is displayed normally and the mark 46 is not displayed, as shown in FIG. 8B.

Further, in the example shown in FIG. 9, the LCD 4
A display element such as an LED near the display area 41 of 0
47 and 48 are provided. Then, when displaying the information currently being broadcast, the information is displayed normally and the LED 47 is turned on, as shown in FIG. 9A.
The LED 48 is turned off. When displaying the information stored in the memory 14, as shown in FIG. 9B,
The information is displayed normally and the LED 47
Is turned off and the LED 48 is turned on.

Further, in the example shown in FIG. 10, LC
A display element 41 of two colors, for example, an LED 49 capable of emitting green and red is provided near the display area 41 of D40. Then, when displaying the information currently being broadcast, the information is displayed normally and the LED 49 is lit in green as shown in FIG. 10A. In addition, when displaying the information stored in the memory 14, FIG.
As shown in 0B, the information is displayed normally and the LED 49 is illuminated in red.

Therefore, also in these examples, it is possible to know from the display state whether the displayed information is currently being broadcast or has been stored in the memory 14.

The display on the LCD 40 is always a normal display, but the color of the light for illumination is displayed when the information currently being broadcast is displayed and the information stored in the memory 14 is displayed. You can change it if you like.

In the above description, the memory 14 has three storage areas, and each area has the size of two lines of the displayed character.
The size of the program may be set, and in that case, the characters displayed by the key operation may be scrolled.

Further, when the character data displayed in the memory 14 is stored, for example, the memory call key 5 is used.
By using 31-533 in combination, the data of the character can be stored in the area corresponding to the memory call key 531-533.

[0052]

According to the present invention, the display state changes depending on whether the character currently being broadcast is displayed or the character stored in the memory is displayed. , It is possible to easily know whether it is the real-time information currently being broadcast or the past information called from the memory.

[Brief description of drawings]

FIG. 1 is a system diagram showing an example of the present invention.

FIG. 2 is a plan view for explaining an example of a display element.

FIG. 3 is a front view showing an example of the present invention.

FIG. 4 is a plan view showing an example of operation keys.

FIG. 5 is a front view showing an example of a display state.

FIG. 6 is a front view showing another example of the display state.

FIG. 7 is a front view showing another example of the display state.

FIG. 8 is a front view showing another example of the display state.

FIG. 9 is a front view showing another example of the display state.

FIG. 10 is a front view showing another example of the display state.

FIG. 11 is a diagram for explaining the present invention.

[Explanation of symbols]

 2 Tuner circuit 3 Intermediate frequency amplifier 4 FM demodulation circuit 5 Stereo demodulation circuit 10 Microcomputer 11 CPU 12 ROM 13 RAM (for work area) 14 Memory 21 Display controller 22 Memory (for display) 23 Memory (character generator) 31 Decoder circuit 32 Operation keys 33 Reception circuit (for remote control) 40 Display element 41 Display area 50 Transmitter (for remote control) 51 Item key 52 Page key 54 Enter key 531 to 533 Memory call key

Claims (6)

[Claims] 1. A circuit for receiving a character multiplex broadcast, a memory for storing character data received by the receiving circuit, a character for the received character data, and a character for the character data retrieved from the memory. And a display element for selectively displaying and changing the display state between displaying the character based on the received character data and displaying the character based on the character data retrieved from the memory. Receiver that did. 2. The receiver according to claim 1, wherein the display state is a normal display or a reverse display of the display on the display element. 3. The receiver according to claim 1, wherein the display state is a display of a part of a display surface of the display element. 4. The receiver according to claim 1, wherein the display state is a display of a display element provided outside the display surface of the display element. 5. The receiver according to claim 1, wherein the display element is an LCD. 6. The receiver according to claim 2, wherein the display element is an LCD.