KR19990061649A - Text service method of mobile phone - Google Patents

Abstract

The present invention relates to a text service method of a mobile phone to provide a user with more convenience by transmitting a text that cannot be displayed on the LCD at a time in the case of SMS (Short Message Service) by voice synthesis. The present invention provides a message arrival notification step of converting a text message into a baseband digital signal, compressing it by a predetermined compression scheme, storing the result in EPIROM, and generating an alarm indicating that the message has arrived; A data conversion step of displaying a received text message on the LCD when an LCD display is requested by the user after an alarm is generated, and converting the text message stored in the YPIROM into voice data when voice transmission is requested by the user; By converting the converted digital voice data into a corresponding analog voice signal and sequentially executing the voice sending step through the speaker, the received text message can be transmitted as voice, thereby providing more convenience to the user.

Description

Text service method of mobile phone

The present invention relates to a text service of a mobile phone, and in particular, in the case of an SMS (Short Message Service), a mobile phone that provides a user with more convenience by transmitting a character that cannot be displayed on the LCD at a time through voice synthesis. It's about the character service method.

In general, a mobile communication system allocates a mobile terminal and a unique telephone number and a producer code (electronic serial number: ESN) to communicate with a myriad of terminals based on these unique numbers.

1 is a block diagram of a general mobile phone system.

As shown therein, a base station 15 called a cell site, which is connected to a cellular wireless communication terminal and land side, modulates various data at high frequency and transmits the data through an antenna ANT1, and the base station 15 The reception filter unit 1 receives the high frequency signal transmitted from the antenna ANT2 and filters only the required band, and amplifies the weak high frequency signal filtered by the reception filter unit 1 to an arbitrary level to generate a local oscillation frequency. And a demodulation unit for detecting an intermediate frequency signal at the mixed frequency and demodulating the original signal, and separating the demodulated signal from the receiver 2 into data and audio signals. And an audio / logic control unit 3 for processing an audio signal input through the microphone 10 and a received data output from the audio / logic control unit 3. The unique number of the corresponding terminal stored in the ROM 5 is compared and analyzed according to the program execution of the program ROM 7, and the analyzed data is stored and displayed in the memory unit 6 and the liquid crystal display unit 8. 15) a frequency synthesizing unit for generating a frequency corresponding to a transmission / reception frequency according to a microprocessor 4 for determining data to be transmitted to and a control signal of the microprocessor 4 through the audio / logical control unit 3; (11) and a transmitter (12) for modulating the data of the microprocessor (4) through the audio / logical controller (3) to a high frequency signal output from the frequency synthesizer (11) and amplifying and transmitting the modulated high frequency signal (12). ) And a transmission filter unit 13 for filtering only the bands necessary for the high frequency signals amplified and transmitted from the transmission unit 12 and transmitting them to the base station 15 through the antenna ANT2.

In the figure, reference numeral 14 denotes a keypad.

The general mobile phone system configured as described above finds the control channel of the closest base station 15 having a large intensity of the received signal at the point where it is located when power is supplied. When the nearest control channel is found, the mobile station enters the non-call mode and receives a message transmitted by the current base station 15 through the selected channel.

That is, when the data modulated to the high frequency is transmitted from the base station 15 in the non-call mode state and received through the antenna ANT2 of the corresponding terminal, the reception filter unit 1 filters only the required band from the received high frequency signal and receives the reception unit ( 2), the receiver 2 amplifies the weak high frequency signal to an arbitrary level, and then mixes it with the local oscillation frequency of the frequency synthesizer 11 to detect the intermediate frequency signal. When the intermediate frequency signal is detected, it is demodulated into the original signal and input to the audio / logical control unit 3.

The audio / logical control unit 3 separates the audio signal and the data from the demodulated signal, outputs the audio signal through the speaker 9, and inputs data from the base station 15 into the microprocessor 4.

Accordingly, the microprocessor 4 searches whether the message of the base station 15 has been received from the audio / logical control unit 3 in the non-call mode state.

At this time, if the message to be transmitted is an SMS to control the liquid crystal display 8 to control to display the transmitted text.

Here, in the case of text transmission using SMS, up to 50 characters can be transmitted in Korean, and since the LCD cannot display them all at once, only a predetermined number of characters are displayed per screen, When the display of the next character is ordered, the transmitted character is displayed by displaying the next character again.

Therefore, the conventional text service method is able to service up to 50 characters in Korean. Since these characters cannot be displayed on the LCD at once, in order to see all the transmitted characters (for example, 50 characters), the user must It was very inconvenient to use because I had to scroll through the screen using key buttons.

Accordingly, the present invention has been proposed to solve various problems occurring in the text service of the conventional mobile phone as described above.

The present invention provides a text message service method of a mobile phone to provide a user with more convenience by transmitting a character that cannot be displayed on the LCD at a time through voice synthesis in the case of SMS (Short Message Service). There is a purpose.

Method according to the present invention for achieving the above object,

A message arrival notification step of converting the baseband digital signal into a baseband digital signal, compressing the baseband digital signal by a predetermined compression method, storing the result in an e-pyrom, and generating an alarm indicating that the message has arrived;

When the LCD display is requested by the user after the alarm is generated, the received text message is displayed on the LCD. When the voice transmission is requested by the user, a data conversion is performed by synthesizing the text message stored in the YPIROM into voice data. Steps;

And converting the converted digital voice data into a corresponding analog voice signal and transmitting the same through a speaker.

1 is a block diagram of a typical mobile phone system;

2 is a control flowchart showing a text service method of a mobile phone according to the present invention.

Explanation of symbols for the main parts of the drawings

3: Audio / Logic Control

4: microprocessor

5: Y pyrom

6: Memory section

14: Key pad

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

The mobile phone system to which the present invention is applied is the same as the general mobile phone system shown in FIG.

2 is a flowchart illustrating a text service method of a mobile phone according to the present invention.

As shown therein, receiving a text message, converting the received analog text signal into a baseband digital signal; Compressing the converted digital baseband signal using a QCELP method; Storing the compressed character data in EPIROM; Generating an alarm indicating that a message has arrived after storing the received text data in EPIROM; Checking a user requirement after the message arrival alarm is generated and displaying the received text message on the LCD when the user requests an LCD display; Converting the text data stored in the YPIROM into a voice synthesis method to generate voice data when the user requests voice transmission; Converting the speech synthesis data into an analog speech signal; And transmitting the converted analog voice signal through a speaker.

First, when a text message is received by the cellular phone system as a high frequency signal, the high frequency signal including the received text data is converted into a digital baseband signal.

Thereafter, the converted digital baseband signal is compressed in a QCELP method and then stored in YPIROM.

As such, when the received text data is stored in the EPROM, a message arrival alarm is generated to notify the user of the reception of the text message.

Thereafter, the user's request to display the text message is confirmed. At this time, when the user requests to display the received text message on the LDC, the text message stored in the EPROM is displayed on the LCD.

Since the characters displayed on the LCD are limited characters as before, if the received characters are more than one screen of the LCD screen, the user can see the characters on the next screen with the scroll function using the key button. It's the same way.

Next, when the user requests the display of the received text message by voice transmission, the compressed data stored in the YPIROM is expanded and converted into original digital data, and the converted digital data is converted into voice data by a voice synthesis method. Convert to.

Thereafter, the converted digital voice data is converted into a corresponding analog voice signal and transmitted through a speaker, so that the user can easily recognize the received text data.

In this case, when the voice is transmitted, all the received text data is sequentially transmitted so that the user does not need to separately operate the key button.

As described above, the present invention converts the received text messages into voice and transmits them to the voice through the speaker so that all the received text messages can be continuously transmitted without the user's key button manipulation. There is an effect that can eliminate the inconvenience caused by the operation.

Claims (1)

In the text service method of the mobile phone, A message arrival notification step of converting the baseband digital signal into a baseband digital signal, compressing the baseband digital signal by a predetermined compression method, storing the result in an e-pyrom, and generating an alarm indicating that the message has arrived; When the LCD display is requested by the user after the alarm is generated, the received text message is displayed on the LCD. When the voice transmission is requested by the user, a data conversion is performed by synthesizing the text message stored in the YPIROM into voice data. Steps; And a voice transmitting step of converting the converted digital voice data into a corresponding analog voice signal and transmitting the same through a speaker.