JPH09205377A - Fm multiplex display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a scroll display of a character for which the line feed to the next line should be performed without inserting space even when the character stretches over the line end of a previous line and the line head of the next line. SOLUTION: This FM multiplexing display device has a control circuit 13 setting a line by the prescribed number of character in which the character of a prescribed size is defined as a unit, storing the inputted character detected by a multiplexing signal detection circuit 9 in a RAM 15 by the form of the set number of character and displaying the stored character on a display part 16 by the scroll of a line. The control circuit 13 performs a processing converting the inputted character into the set number of character when the number of character of the one line of the detected inputted character is different from the set number of character of the one line. When the character for which the line feed to the next line stretches over the line end of the previous line and the line head of the next line in this processing, a null string mark meaning that a character to be a display object does not exist at the part where the stretched character comes to the line end of the previous line is inserted and the stretched character is located at the line head of the next line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to an FM multiplex display device that displays characters of multiplex broadcast.

[0002]

2. Description of the Related Art FM multiplex broadcasting carried out based on the Ministry of Posts and Telecommunications Notification No. 461 uses characters and graphic information, additional information, etc.
This is a broadcasting system that provides a new service by multiplexing in the gap between the radio waves of M audio broadcasting (see Japanese Patent Laid-Open No. 3-6926). These include display information such as news, weather forecasts, complementary programs, music programs, traffic information and emergency broadcasts, and desired information can be selected and displayed.

Therefore, the character data of the above-mentioned FM multiplex broadcast is displayed on a display device capable of displaying characters by turning on an LED or the like to provide news or weather forecast information on the street or traffic information on the road. It was thought to inform.

[0004]

The characters transmitted by FM multiplex broadcasting are 15.5 characters × 2 lines in the size of standard characters (full-width, horizontal 16 dots × vertical 24 dots). However,
Some portable devices that cannot have a large-screen display section due to restrictions such as a display device installed on the street or a road or a keyboard cannot display 15.5 characters × 2 lines. For this reason, for example, in a display device of 8 characters x 1 line, 15.5.
A method of scrolling characters x 2 lines into 1 line may be considered.

However, since there are a plurality of character sizes and the width thereof is from 4 dots for ultra-small characters to 32 dots for double-width characters, the 8th and 9th characters as shown in [Reception] of FIG.
One character may straddle the eye. Since the characters are stored in the form of one line and eight characters, a line feed is made with the characters straddling, and a space is generated at the end of the eighth line. When this is scroll-displayed, this space is inserted and incorrect data is displayed.

[0006]

The present invention has been made in view of the above points, and a first feature thereof is a multiple signal detection circuit for detecting a character of FM multiplex broadcasting, a display section, and the display section. Storage means for storing the characters to be displayed on the display, and one line is set with a predetermined number of characters in units of a predetermined size, and the input characters detected by the multiple signal detection circuit are stored in the format of the set number of characters. In an FM multiplex display device having a control circuit for displaying the characters stored in the storage means and stored in the display unit by scrolling one line, the control circuit sets the number of characters of one line of the input character. When the number of characters on one line is different from the number of characters set on the input character, the process to convert the input character to the set number of characters is performed. , Said Character inserts the null string mark means that no characters to be displayed in a portion across the end of the previous row, and to the character across said beginning of the next line.

A second feature is that the control circuit performs a process of converting the input character into the set number of characters when the number of characters in the one line of the input character is different from the set number of characters in the one line. , In this process, if the character to be fed to the next line straddles the end of the previous line and the beginning of the next line, check that there is no character to be displayed in the part where the straddling character extends to the end of the previous line. A null string mark is inserted, the beginning of the next line is set to the straddling character, the rest of the next line is set to the null string mark, and the characters following the straddling character from the beginning of the next line are inserted.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an FM multiplex display device of the present invention. This FM multiplex broadcast complies with Ministry of Posts and Telecommunications Notification No. 461.

(1) is an FM receiving circuit, which comprises an FM front end (2), an FM-IF detector (3) and an FM stereo demodulation circuit (4). The FM front end (2) amplifies the signal received from the antenna (5) into a high frequency signal, mixes the high frequency signal and the oscillation signal from the PLL circuit (6) and outputs an intermediate frequency signal. FM-I
The F detector (3) performs FM detection on the intermediate frequency signal output from the FM front end (2). The FM stereo demodulation circuit (4) reproduces the L channel and R channel signals using the stereo composite signal input from the FM-IF detector (3), and outputs each channel signal.
The signal output from the FM stereo demodulation circuit (4) is amplified by the amplifier circuit (7) and output as voice from the speaker (8).

Reference numeral (9) is a multiplex signal detection circuit, which comprises a multiplex filter (10) and a data demodulation circuit (11). The multiplexing filter (10) removes a voice signal and a noise component from the output signal of the FM front end (2),
LMSK (Level controll) multiplexed at 76 kHz
ed Minimum Shift Keying) signal is extracted. LMSK
Is a modulation method for controlling the size of a multiplexed signal according to the size of a stereo audio signal. The data demodulation circuit (11) demodulates the LMSK signal into a displayable data signal. The signal from the multiplexing filter (10) is subjected to synchronous reproduction and error correction by processing in block units and frame units. When the block-by-block synchronous reproduction process and the error correction process are completed, a signal notifying this is sent to the control circuit (13) described later. When the frame-by-frame synchronous reproduction processing and the error correction processing are completed, a signal for notifying this is sent to the control circuit (13) described later. Further, the data demodulation circuit (11) detects a program number that distinguishes the contents of the display information, and sends this signal to the control circuit (13).

An operation unit (12) is connected to a control circuit (13) described later. Reference numeral (13) is a control circuit, which controls each part based on the operation unit (12) and the multiple signal detection circuit (9). (14) is a ROM, and the control circuit (13)
The program that operates is stored. (15) is RAM
In addition, the control circuit (1
Data necessary for the operation of 3) is stored. Reference numeral (16) is a display unit, which displays menu information of FM multiplex broadcasting, characters of display information, or frequency or time of AM / FM broadcasting station. The number of displayed characters is 8 characters x 1 line.

With the above arrangement, the FM multiple display device can detect and display the character data multiplexed in the radio wave gap. However, the display part (16) is 8 characters x 1
This is a line, and 15.5 characters × 2 lines of FM multiplex broadcast cannot be displayed as they are. Therefore, the characters (15.5 characters × 2 lines) are scrolled on the display unit (16) of 8 characters × 1 line. To this end, the control circuit (13)
15.5 characters output from the multiple signal detection circuit (9) /
The characters in the line are converted into 8 characters / line and stored in the RAM (15). Then, this is read out and scrolled and displayed on the 8-character display unit (16) while connecting the characters in each line.

However, in addition to the standard 16-dot width (double-byte) and double-height characters transmitted in FM multiplex broadcasting, a 4-dot ultra-small size, 8-dot small size (ruby), and medium-size (half-width) character
Then, there are 32 dots horizontally doubled and vertically and horizontally doubled (quadruple angle).
If these are mixed, the standard character size is 8
When line-feeding each character, the characters that should be lined up on the next line may extend to the end of the previous line and the beginning of the next line. Also, when the start point of a character that is not a space is in the middle of a unit character, the character that should be inserted on the next line extends to the end of the previous line and the beginning of the next line.

The operation when the character to be fed to the next line extends over the end of the previous line and the beginning of the next line will be described. FIG. 2 is a diagram showing the operation of the control circuit (13). As shown in [Reception] in FIG. 2, there are odd-numbered half-width characters of the telephone number. For this reason, the full-width character "story" spans the 8th and 9th characters. Therefore, as shown in [Memory], first, a null string mark (A in FIG. 2) which means that there is no character to be displayed is set. This null string mark may be assigned a character code that is not normally used. When the null string mark is written, nothing is displayed there, and the display position corresponding to the null string mark is displayed with the next character padded. That is, the null string mark does not display a blank like a space.

When the control circuit (13) converts a character of 15.5 characters / line into 8 characters / line, the portion where the character straddling this null string mark is applied to the end of the line of the preceding line (B) ("Den"). After). Then, a character (“talk”) that crosses the beginning of the next line (C) is set, and the rest of the next line is a null string mark, and the characters after the straddling character from the beginning of the next line (C) (“do ...”) Insert.

The control circuit (13) converts in this way and R
Store in AM (15). When this is read and displayed on the display unit (16), as shown in [Display] in FIG.
The null string mark after "Den" causes a scroll display without a space between "Den" and "Talk."

The null string mark after "talk" indicates that the next line (C) is a character including a straddling character, and can be distinguished from other lines.

[0018]

Since the display unit is small, the character data of 15.5 characters × 2 lines of FM multiplex broadcasting cannot be displayed as it is, and the number of characters / line different from 15.5 characters / line is converted, In the FM multiplex display device that scrolls in one line, even if the character to be inserted in the next line spans the end of the previous line and the beginning of the next line, scroll display can be performed without inserting a space.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main part of a configuration of an exemplary embodiment of the present invention.

FIG. 2 is a diagram showing an operation of the embodiment.

FIG. 3 is a diagram showing a conventional operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 FM receiving circuit 9 Multiplex signal detecting circuit 11 Data demodulating circuit 13 Control circuit 14 ROM 15 RAM 16 Display section

Claims (2)

[Claims] 1. A multiple signal detection circuit for detecting characters of FM multiplex broadcasting, a display section, a storage means for storing characters to be displayed on the display section, and a predetermined number of characters in units of characters of a predetermined size. And a control circuit for setting one line by means of storing the input characters detected by the multiplex signal detection circuit in the storage means in the format of the set number of characters and displaying the characters stored in the display unit by scrolling one line. In the FM multiplex display device having the above, the control circuit performs a process of converting the input character into the set number of characters when the number of characters in the one line of the input character is different from the set number of characters in the one line, In this process, if the character that should be inserted in the next line straddles the end of the previous line and the beginning of the next line, it means that there is no character to be displayed in the part where the straddling character extends to the end of the previous line. Do Insert the Le string mark, FM multiplex display device, characterized by the character across said beginning of the next line. 2. A multiple signal detection circuit for detecting characters of FM multiplex broadcasting, a display section, a storage means for storing the characters displayed on the display section, and a predetermined number of characters in units of a predetermined size of characters. And a control circuit for setting one line by means of storing the input characters detected by the multiplex signal detection circuit in the storage means in the format of the set number of characters and displaying the characters stored in the display unit by scrolling one line. In the FM multiplex display device having the above, the control circuit performs a process of converting the input character into the set number of characters when the number of characters in the one line of the input character is different from the set number of characters in the one line, In this process, if the character that should be inserted in the next line straddles the end of the previous line and the beginning of the next line, it means that there is no character to be displayed in the part where the straddling character extends to the end of the previous line. Do Insert the Le string mark, the rest of the next line and the character across said beginning of the next line and the null string marks, FM multiplex display device characterized by placing the span of the subsequent character from the beginning of successive rows.