KR100504817B1 - Monotony melody playing method for mobile communication terminal - Google Patents

Abstract

The present invention relates to a method for reproducing a single tone melody of a mobile communication terminal. In the related art, the structure of a single tone melody composed of a conventional key-persistent pair is not supported due to a structure different from the structure supported by a sequencer of the melody sound source, thereby degrading sound quality. There was this. In view of the above problems, the present invention provides a method comprising: calling a sound identifier of a single melody selected by a user in a user interface task, outputting a sound generation command, and delivering a user end command; Initializing a melody sound source by receiving the sound generation command from a sound task, decoding a key-continuous pair of single melody into a real-time MIDI message of the melody sound source, and determining the end of playback of the melody; Initializing the melody source unit by initializing the sound task in the driver of the single melody and loading a real-time playback device driver according to the single melody processing to process a MIDI message transmitted from the sound task. As the single terminal melody is reproduced using 128 kinds of musical instruments of beautiful tone in the communication terminal, the sound quality is high and the ringer is unnecessary in hardware, so the circuit is simplified and the product is easily implemented.

Description

MONOTONY MELODY PLAYING METHOD FOR MOBILE COMMUNICATION TERMINAL}

The present invention relates to a method for reproducing a single tone melody of a mobile communication terminal, and more particularly, to a method for reproducing a single tone melody of a mobile communication terminal by using a melody sound source of a melody sound source unit embedded in a mobile communication terminal to improve sound quality. It is about.

As shown in FIG. 1, the sound processor of the conventional mobile communication terminal includes: a terminal modem 11 for reproducing and outputting a ringtone sound source by a vocoder and a timer; A ring signal receiver 12 for receiving a ring tone output from the terminal modem 11 and outputting it to the outside; And a speaker 13 and a headset 14 for outputting the voice of the other party demodulated by the terminal modem 11.

The terminal modem 11 reproduces the ringtone sound source using an internal vocoder and a timer and outputs it to the outside through the bell signal signal 12. The speaker 13 and the headset 14 output the voice of the other party selected and demodulated by the terminal modem 11.

Herein, the operation of the terminal modem for reproducing the ringtone sound source will be described in detail.

A terminal modem without a built-in melody source operates as follows to produce sound.

First, the user interface delivers a sound generation command to the sound task along with information needed to deliver sound data according to rules for process communication.

The sound task determines which sound generator to select while receiving a command for sound generation from the user interface and follows the sound generation process according to each generator.

Qualcomm's terminal modem uses tone (snd_compact_tone_type) as the basic unit for generating sound. Each tone consists of a key value representing the height of the sound and a duration value representing the duration.

The sound task has information about each melody as a melody table composed of combinations of the tones described above, and the user interface task generates a sound by calling an identifier assigned to this melody.

The sound task matches the identifiers included in the basic process instructions to age each tone in the sound database at the required time and to generate sound through the corresponding sound generator. The type of aging required for each sound generator is performed through the aging function of the corresponding sound generator.

The melody format included in the melody download feature, which was downloaded via a short message, is listed as a key-persistent pair that can match Qualcomm's compact tone type.

2 is a block diagram showing the configuration of a sound processing unit of a mobile communication terminal incorporating a conventional melody sound source. As shown in FIG. 2, a voice signal and a music signal of a counterpart are output through an analog line, and music file data is transmitted through a data line. A terminal modem 21 for outputting; A first multiplexer 22 for switching and outputting a voice signal and a music signal transmitted through the analog line; A melody sound source unit 23 which receives a music signal separated by the first multiplexer 22 and music file data input through the data line, loads a data sequencer in a file unit, and processes the melody and outputs the data sequencer; A second multiplexer (24) for switching and outputting the speaker output of the melody sound source unit (23) and the output of the first multiplexer (22); The headset 26 is configured to receive the headset output of the terminal modem 21 and the headset output of the melody sound source 23 to be output to the outside.

The terminal modem 21 outputs an audio signal and a music signal, which are analog signals, through a receiver terminal, outputs a voice signal through a headset terminal, and outputs music file data through a data terminal.

The first multiplexer 22 separates and outputs a voice signal and a music signal output through the receiver terminal.

The melody sound source unit 23 receives the music file data output through the data terminal of the terminal modem 21 and the music signal separated by the first multiplexer 22 and loads a data sequencer in units of files to perform a melody. Process them and output them to the speaker output or headset output.

The second multiplexer 24 multiplexes the speaker output of the melody sound source unit 23 and the speaker output of the first multiplexer 22 and transmits the same to the speaker 25.

The headset 26 is connected to the headset output of the melody sound source unit 23 and the headset output of the terminal modem 21 to output sound.

The speaker output is determined by the path selected by the two switches of the first multiplexer 22 and the second multiplexer 24, which are controlled by the terminal modem 21. The two multiplexers 22 and 24 can be opened and closed individually, thereby outputting the music signal of the terminal modem 21 and the music signal of the melody sound source unit 23 to one speaker 25.

The melody sound source unit 23 can also set the individual paths of the speaker 25 and the headset 26. In this case, due to the configuration of the internal circuit, the music file data and the music signal received from the terminal modem 21 can be simultaneously routed in two paths. It does not print.

As a melody sound source unit 23 used in a mobile communication terminal, a Yamaha sound source chip is used, and the sound source chip generates a melody by receiving a file conforming to a Yamaha format in a data format, unlike using a device of the terminal modem 21. .

Yamaha's sound source chip is clocked from the outside and operates with its own sequencer, eliminating the need for Qualcomm's aging process and device selection.

Therefore, the user interface task or the sound task only carries the music file data to the Yamaha sound source chip through the data line.

However, in the prior art as described above, the structure of the single-tone melody consisting of the existing key-continuous pair is not supported due to the structure different from the structure supported by the own sequencer of the melody sound source unit, and thus there is a problem in that sound quality is degraded.

Accordingly, the present invention has been made in view of the above problems, and the single tone melody of the mobile communication terminal is decoded into a format suitable for the melody sound source so that the single sound melody can be reproduced by the melody sound source. The purpose is to provide a method.

In order to achieve the above object, the present invention provides a method for generating a sound generation command by calling a sound identifier of a single melody selected by a user in a user interface task, and transmitting a user end command; Initializing a melody sound source by receiving the sound generation command from a sound task, decoding a key-continuous pair of single melody into a real-time MIDI message of the melody sound source, and determining the end of playback of the melody; Initializing the melody sound source by the initialization of the sound task in the driver of the single-tone melody, and loading the real-time playback device driver according to the single-tone melody processing characterized in that it comprises a MIDI message delivered from the sound task.

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

The present invention operates in the same device as that of the sound processing unit of a mobile communication terminal incorporating a conventional melody sound source, and does not require any hardware change, and is provided with a melody sound source in hardware and a device driver in software. You need a sequencer.

In addition, it is essential to change the existing Qualcomm-based sound system in order to use real-time MIDI of the melody source.

3 is an operation flowchart of a method for reproducing a single melody of a mobile communication terminal according to the present invention. As shown in FIG. 3, a user interface task calls a sound identifier of a single melody selected by a user to output a sound generation command and terminate the user. Transmitting a command (S10); Receiving a sound generation command from a sound task, initializing a melody sound source unit, deciphering and outputting a key-continuous pair of single melody into a real-time MIDI message of the melody sound source unit, and determining the end of playback of the single melody; In step S40, the melody sound source is initialized by the initialization of the sound task in the driver of the single melody and the MIDI message transmitted from the sound task is processed by loading the real-time playback device driver according to the single melody process.

The sound generation step (S20) of the sound task receives a sound generation command from the user interface task (S10) and analyzes the sound identifier to determine the item for single melody processing, and recognizes the recognizer for single melody processing to the driver of the melody sound source unit. Setting step (S21); Initializing the melody sound source by power control, volume control, etc. through the driver of the melody sound source by referring to the previously set volume value (S22); Calculating a key and a duration of each tone while performing a series of operations to generate a sound when the melody sound source is initialized (S23); Determining a duration by decoding the message into a corresponding real-time MIDI message with reference to the key value and transmitting the melody to a melody sound source, and setting a timer by the duration (S24); If the recognizer of the tone table indicates the end of the melody or if the user requests termination, the sound generation is terminated (S25).

The melody processing step (S40) of the driver of the melody sound source unit may include initializing a melody sound source unit such as power control and volume control by a sound task (S41); When the initialization is completed, loading the real-time playback device driver and staying in a standby state for single-tone melody processing (S42 and S43); The step of receiving a real-time MIDI message from the sound task in the standby state to process a single tone melody (S44) will be described as follows.

The user interface task S10 calls a sound identifier to transmit a sound generation command to the sound task S20.

The sound task receives the sound generation command and processes command analysis through a sound request routine (S21).

The sound request routine analyzes the sound identifier, reads whether the item is for the user's single tone melody processing, and if it is determined to be a single tone melody, sets a recognizer for single tone melody processing in the sound hardware and the driver of the melody sound source (S21).

The single tone melody process initializes the volume through the driver of the melody sound source unit with reference to the previously used volume value (S22). In addition, the melody sound source unit is initialized by processing power control, volume control, etc. through the driver of the melody sound source unit (S41).

After the initialization for the single-tone melody of the melody source unit is completed, the melody source unit loads an internal device driver for reproducing real-time MIDI without loading a data sequencer in units of files (S42). After the device driver initialization, the melody sound source unit stays in the standby state for single-tone melody processing while the power is already activated and activated (S43).

Thereafter, the sound task of the terminal modem repeats an operation of calculating a key and a duration of each tone through an aging function while performing a series of operations for generating a sound (S23 and S24). Here, the single melody processing routine of the melody sound source unit is the same as the single melody processing routine through the existing ringer.

The tone generator function of the sound generator, through the aging function of the sound, decodes the message into a corresponding real-time MIDI message by referring to the key value and delivers it to the melody source.

The duration of each tone is determined by the sound task's sound transition function, which is the same as the conventional sound generation process. That is, the duration is determined by calculating the duration and setting the timer by the calculated duration (S24).

The duration and disconnection of the tone in the melody is determined by the key value of each tone, and the single tone melody is appropriately coded in the real-time MIDI format of the melody source in consideration of the presence or absence of the tone and the like.

When the single tone melody is terminated by the end of the recognizer or the user of the tone table indicating the end of the melody, the melody sound source unit is also terminated at the end (S25). Accordingly, the melody sound source drops in power.

As described in detail above, the present invention reproduces a single tone melody using 128 kinds of musical instruments of a beautiful tone in a mobile communication terminal using a Yamaha sound source chip, so that the sound quality is high and hardware does not require a ringer, resulting in a simplified circuit. It is easy to implement the product.

1 is a block diagram showing a configuration of a sound processing unit of a conventional mobile communication terminal.

2 is a block diagram showing a configuration of a sound processing unit of a mobile communication terminal incorporating a conventional melody sound source;

3 is a flowchart illustrating a method for reproducing a single melody of a mobile communication terminal according to the present invention.

Claims (3)

Calling a sound identifier of a single melody selected by a user in a user interface task to output a sound generation command and to deliver a user end command; Initializing a melody sound source by receiving the sound generation command from a sound task, decoding a key-continuous pair of single melody into a real-time MIDI message of the melody sound source, and determining the end of playback of the melody; Initializing the melody source unit by initializing the sound task in the driver of the single melody and loading a real-time reproducing device driver according to the single melody processing to process a MIDI message transmitted from the sound task. To play single note melody. The method of claim 1, wherein the sound generation step of the sound task Receiving a sound generation command from a user interface task and analyzing a sound identifier to determine an item for single melody processing, setting an identifier for single melody processing in a driver of the melody sound source unit; Initializing the melody sound source through a driver of the melody sound source by referring to a previously set volume value; Calculating a key and a duration of each tone while performing a series of operations to generate a sound when the melody sound source is initialized; Determining a duration by decoding the message into a corresponding real-time MIDI message by referring to the key value and transmitting the message to a melody sound source, and setting a timer for the duration; And ending the sound generation when the recognizer of the tone table indicates the end of the melody or the user requests the end of the melody. The method of claim 1, wherein the melody processing step of the driver of the melody sound source unit Initializing a melody sound source by a sound task; When the initialization is completed, loading the real-time playback device driver and staying in the standby state for the single tone melody processing; And receiving a real-time MIDI message from the sound task in the standby state to process a single tone melody.