KR100647545B1 - Apparatus for processing music data in mobile communication terminal - Google Patents

Abstract

An apparatus for processing music data in a mobile communication terminal is provided to reduce an operation load of a control unit while reproducing the music data. A memory(102) stores music data. An MP3(MPEG(Moving Picture Experts Group) layer 3) codec(110) converts the music data into an analog signal, and transmits the analog signal to the outside. A control unit(100) reads the music data stored in the memory(102), and provides the read music data to the MP3 codec(110) for particular period.

Description

Music data processing device of mobile communication terminal {APPARATUS FOR PROCESSING MUSIC DATA IN MOBILE COMMUNICATION TERMINAL}

1 is a block diagram showing the configuration of a mobile communication terminal having a music data reproducing function according to the present invention;

2 is a block diagram showing the configuration of a music data codec according to the present invention; and

3 is a diagram showing an operation cycle of a control unit during reproduction of music data according to the present invention;

The present invention relates to a music data processing apparatus of a mobile communication terminal, and more particularly, to an apparatus having a separate music data codec for processing music data in a mobile communication terminal having a music data reproducing function.

The mobile communication terminal has rapidly spread due to the convenience of the portable and has become a necessity of the modern society. Moreover, service providers (terminal manufacturers) are competitively developing terminals with more convenient functions to secure many users.

E.g. The mobile communication terminal includes a phone book, a game, a short message, the Internet, an e-mail, a morning call, music (MPEG Layer 3), a digital camera. It provides various additional functions.

The music function is capable of storing a large amount of data in a small memory due to the development of moving picture expert group (MPEG) technology, which is a compression standard for moving picture data, and in addition to the image data and audio data, the MPEG compression technology Is applied to voice data, that is, audio compression, so that music can be enjoyed with a small amount of digital data. That is, many music data compressed in a predetermined video data format can be stored in a limited memory of the mobile communication terminal, so that music can be enjoyed on the go.

In order to play the compressed music data in the mobile communication terminal, the control unit of the mobile communication terminal reads the music data stored in the memory and reproduces it using a voice processing unit (CODEC) included in the control unit, and then converts it into an analog signal. Play out through speaker, earphone. In this case, since the voice processing unit of the control unit processes the music data, the control unit must maintain the active state while the music data is reproduced.

As described above, in order to play the compressed music data in the mobile communication terminal, the voice processor must maintain the activated state. Therefore, the control unit including the voice processing unit also needs to maintain the active state continuously during the music listening period, causing a problem of increased power consumption.

Accordingly, an object of the present invention is to provide a music data processing apparatus of a mobile communication terminal for reducing power consumption while playing music data.

Another object of the present invention is to provide a music data processing apparatus of a mobile communication terminal which reduces an operation load of a controller while playing music data.

According to a first aspect of the present invention for achieving the above object, a music data processing apparatus of a mobile communication terminal having a music playback function, the memory for storing the music data, and converts the music data into an analog signal to the external And a control unit for reading the music data codec transmitted to the music data codec and the music data stored in the memory and providing the music data codec to the music data codec at predetermined intervals.

According to a second aspect of the present invention, a music playback codec includes a buffer for storing music data received from the controller, a codec for converting music data stored in the buffer into an analog signal, and a signal for transmitting the analog signal. It characterized in that it comprises a switch for selecting an external transmission device.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that the specific description of the related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, the present invention describes a technique for reducing the operation load and power consumption of the controller while playing music data in a mobile communication terminal having a music data playing function.

1 is a block diagram showing the configuration of a mobile communication terminal having a music data reproduction function according to the present invention. In the following description, the mobile communication terminal is a cellular phone having a music data reproducing function, a personal communication system (PCS: Personal Communication Assistant), a PDA (PDA: Personal Data Assistant), IMT2000 (International Mobile Telecommunication) -2000) is meant to include all terminals, and the following description will be given with the general configuration of the above examples. In addition, in the following description, the music data is based on music files in MP3 format. However, the music data is not limited to MP3 files and is protected by music data and DRM (Digital Rights Management) of all formats that can be played on a mobile communication terminal. Music files and the like.

As illustrated in FIG. 1, the mobile communication terminal includes a control unit 100, a memory 102, a display unit 104, a keypad 106, a communication module 108, a music data codec 110, and an amplifier ( 112, a speaker 114, earphones 116, and a microphone 118.

First, a control unit (MPU: Micro-Processer Unit) 100 controls the overall operation of the mobile communication terminal. For example, it performs processing and control for voice call and data communication. In addition to the normal function, the present invention processes the function of transmitting the MP3 data stored in the memory 102 to the read music data codec 110, which is activated at regular intervals when the music data is reproduced. In this case, the music data codec 110 may be a codec for an MP3 file or a codec for a music file of a format that can be reproduced by the mobile communication terminal. In the following description, description of the processing and control of the conventional control unit 100 is omitted.

The voice processor 121 is included in the controller 100 and converts the digital voice signal provided from the communication module 108 into an analog voice signal and transmits the analog voice signal through the speaker 114 or the earphone 116. In addition, the voice signal received through the microphone 118 converts into PCM data.

The memory 102 is composed of a read only memory (ROM), a random access memory (RAM), and a flash ROM. The ROM stores microcode and various reference data of a program for processing and controlling the controller 100. The RAM is a working memory of the controller 100 and stores temporary data generated during execution of various programs. In addition, the flash ROM stores various updatable storage data and music data such as a phone book, an outgoing message, and an incoming message. In the present invention, music data is stored in the memory 102.

The display unit 104 displays state information generated during the operation of the mobile communication terminal, a limited number of characters, a large amount of moving images and still images, and the like. The display unit 104 may use a color liquid crystal display (LCD).

Key pad 106 is a numeric key buttons of 0 to 9, menu button (menu), cancel button (clear), confirmation button, call button (TALK), end button (END), Internet access button, A plurality of function keys such as navigation key (or directional key) buttons (▲ / ▼ / ◀ / ▶) and a text input key are provided to provide the control unit 100 with key input data corresponding to a key pressed by the user.

In addition, the communication module 108 processes data transmitted and received through the antenna. For example, in the case of reception, after converting a radio frequency (RF) signal received through the antenna into a baseband signal by decreasing the frequency, the baseband signal is despreading and channel decoding. coding) function. In case of transmission, after performing channel coding and spreading on the data to be transmitted, the baseband signal is frequency-up converted into an RF signal and transmitted through the antenna.

The music data codec 110 processes the music data provided from the controller 100 and reproduces the data. The music data codec 110 includes a buffer 201, a codec 203, and a switch 205 as shown in FIG. It is composed.

The buffer 201 stores music data provided by the control unit 100 at predetermined intervals. Therefore, the buffer 201 is large enough to continuously play music data until the controller 100 is switched from a sleep state to a wake-up state and provides music data. It should be able to store music data.

The codec 203 reproduces the music data stored in the buffer 201, converts it into an analog signal, and outputs the converted analog signal.

The switch 205 selects and sends an analog signal provided from the codec 203 to an external transmitter such as a speaker 114 or an earphone 116. For example, the switch 205 determines an external transmission device according to whether the earphone 116 is attached or detached. That is, when the earphone 116 is mounted, the switch transmits an analog signal provided from the codec 203 to the outside through the earphone 116. If the earphone 116 is not mounted, the switch amplifies the analog signal provided from the codec 203 by the amplifier 112 and transmits it to the outside through the speaker 114.

As described above, the controller 100 performs different operations when processing a general voice signal and playing music data.

first. In the case of processing a general voice signal, the digital voice signal provided from the communication module 108 is converted into an analog voice signal by using the voice processor 121 included in the controller 100, and the speaker 114 or the earphone ( 116) to the outside. In addition, when a voice signal to be transmitted through the microphone 118 is provided, the voice signal is converted into PCM data.

Next, when playing the music data, the control unit 100 repeats the deactivation state and the activation state at regular intervals, as shown in FIG. 3, and the memory 102 whenever the control unit 100 is activated. The music data stored in the data is read and provided to the separate music data codec 110. The music data received from the controller 100 is stored in the buffer 201, and the codec 203 plays the stored music data and transmits the stored music data to the outside through the speaker 114 or the earphone 116.

That is, when reproducing music data, the control unit 100 reproduces the music data by using an external music data codec instead of the voice processing unit 121 included therein, so that the music data is reproduced even while the music data is reproduced. It is not necessary for the controller 100 to continuously maintain the activated state.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, by providing a separate music data codec for processing / reproducing music data in a mobile communication terminal having a music data reproducing function, the controller of the mobile communication terminal is not continuously activated during the reproduction of the music data. Since it is activated periodically and the power consumption of the mobile communication terminal can be reduced.

In addition, the music data processing apparatus of the mobile communication terminal according to the present invention has the advantage that the operation load of the controller is reduced by processing the music data periodically provided by the controller in a music data codec separate from the controller.

Claims (6)

In the music data processing apparatus of the mobile communication terminal having a music playback function, A memory for storing the music data; A music data codec (CODEC) for converting the music data into an analog signal and transmitting it to the outside; And a controller which reads the music data stored in the memory and provides the music data codec to the music data codec at predetermined intervals. The method of claim 1, The control unit, And switching from a sleep state to a wake-up state at predetermined intervals, and reading a predetermined amount of music data from the active state and providing the music data to the music data codec. The method of claim 1, The music data codec, A buffer for storing music data received from the controller; A codec for converting music data stored in the buffer into an analog signal; And a switch for selecting an external transmitter for transmitting the analog signal. The method of claim 3, wherein The buffer is characterized in that for storing the music data of the size or more that can be reproduced until the music data is received from the control unit. The method of claim 3, wherein The external transmission device, characterized in that any one of a speaker or earphone. The method of claim 1, The music data, A device comprising an MP3 (MPEG Layer 3) file and / or a music file of any format that can be processed by the music data codec.

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