KR100568110B1 - A compact disk player with an MP3 module and its control method - Google Patents

Abstract

The disclosed invention relates to a compact disc player having an MP3 module and a control method thereof. Disclosed is a CDP having a microcomputer, a digital signal processor and an analog / digital converter, comprising a MP3 module for decoding MP3 data read from a CD and converting the pulse code modulation data into an MP3 module. The MP3 signal processing unit descrambles the data recorded on the CD, and detects and corrects an error; An MP3 decoder for decoding the MP3 data into pulse code modulation data; And a memory which buffers the data according to descrambling and buffers the MP3 data to be decoded. And an MP3 micom that bidirectionally communicates with the micom of the CDP and controls the MP3 module. The CDP having the MP3 module according to the present invention can play both MP3 files contained in an audio CD and a CD ROM. The ASIC can be used to reduce the cost and size of the entire system, and to prevent data errors caused by vibration of the vehicle or portable CDP. In addition, the portable MP3 player system can be supplemented to play the CD used in the PC as it is, and the storage capacity can be greatly improved by replacing the storage medium with the CD.

MP3, MPEG1 Layer 3, MP3 Player, Compact Disc, Compact Disc Player, Digital Signal Processor

Description

A compact disk player with an MP3 module and its control method             

1 is a schematic configuration diagram of a compact disc player according to the prior art,

2 is a schematic configuration diagram of an MP3 player according to the prior art;

3 is a configuration diagram of a compact disc player having an MP3 module according to the present invention;

4 is a view for explaining signal processing of a compact disc player having an MP3 module according to the present invention;

5 is a detailed configuration diagram of an MP3 signal processor according to the present invention;

6 is an operation flowchart of a control method of a compact disc player having an MP3 module according to the present invention, and

7 is a flowchart illustrating a method of controlling the MP3 signal processor according to the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact disc player having an MP3 module and a control method thereof. In particular, in a compact disc player for audio, a MPEG1 Layer3 (Motion Picture Expert Group 1 Layer3) The present invention relates to a compact disc player having an MP3 module having an MP3 module for reproducing data, and capable of driving and reproducing a compact disc in which MP3 data or CD data is recorded.

In general, a compact disk (CD) is a digital recording of a voice or the like on a transparent plastic disk using a pulse code modulation (PCM) method using a laser. The signal is also detected by the laser reflected light at the time. Such a record or player for a CD is called a CDP.

MPEG, which stands for Motion Picture Expert Group, refers to a method of decompression and compression of digital audio / video data standardized by the International Standards Organization (ISO). MPEG is divided into MPEG1, MPEG2, and the like. MPEG1 can process digital audio / video streams up to 1.5Mbps, and is suitable for a video player based on the aforementioned CD. MPEG2 includes the MPEG1 specification described above, is designed for high bit rates and multiple channels, and is adopted by DVB in Europe, and is expected to be used in next generation high definition TV (HDTV) and digital consumer audio / video environments. It is becoming. The MPEG1 audio is divided into layers 1, 2, and 3 according to complexity and compression ratio, and layer 3 has the most complex but the highest performance.

MP3, on the other hand, is a digital file that contains music and is widely spreading among PC users. MP3 refers to the above-mentioned standard regarding the layer 3 audio of MPEG1, and the sound quality is almost similar to that of the CD, and the compression ratio of data is about 1/11. MP3 can store 3 to 4 minutes of music in about 2 to 5 Mbytes. For example, if you store it on a CD of 650 Mbytes, you can enjoy as much as 14 hours of music on CD. Therefore, the advantages of MP3 are that the amount of available data is large, and it is suitable for home appliances from CD, under Internet, audio CD, and PC environment, and can be used by record companies. MP3 is a method developed for digital audio broadcasting by the Fraunhofer Institute in Germany. It uses a method of dividing the sound by frequency and compressing it.

MP3 player, a portable digital audio device, is a device that allows users to download MP3 music files through the Internet or PC communication without tape or CD, and to carry them in a portable player instead of a computer to enjoy music.

1 is a schematic configuration diagram of a general CDP, in which the CDP includes a spindle motor 2a for rotating the compact disc 1; An optical pickup unit 3 for tracking and reproducing the compact disc 1 to convert detected light into an electrical signal; A thread motor 2b for transferring the optical pickup unit 3; An analog waveform shaping unit 4 for linear equalization and waveform shaping of the high frequency analog signal detected by the optical pickup unit 3; A synchronization detector 5 for detecting the frame synchronization signal and finding the head position of each frame; A phase locked loop (PLL) 6 for generating a continuous pulse train and supplying the synchronized pulse detector and the digital signal processor; A digital signal processor (DSP) 7 which demodulates an EFM (Eight to Fourteen Modulation) signal to generate parity for detecting digital audio data and error correction; A digital-to-analog converter 8 for converting a digital signal into an analog signal; A servo unit 10 for controlling tracking and focusing of the optical pickup unit and controlling rotation of the compact disc; A drive unit 9 for driving the spindle motor 2a and the thread motor 2b according to the control command of the servo unit, respectively; A central processing unit (11) for controlling the components; And a memory 12 for storing digital data processed by the DSP 7.

The playback operation of the CDP according to FIG. 1 is as follows. First, when the spindle motor 2a rotates the compact disc 1, the optical pickup unit 3 tracks and reproduces the compact disc 1 to convert the detected light into an electrical signal, and thus the tracking error signal ( TE) and a focusing error signal FE. In this case, the optical pickup unit 3 includes a laser diode (not shown), a photodetector (not shown), an objective lens (not shown), and the like.

The thread motor 2b transfers the optical pickup unit 3 so that the compact disc 1 can be traced and reproduced, and the analog waveform shaping unit 4 is an analog of high frequency detected by the optical pickup unit 3. After amplifying the signal to a predetermined level, DC components and noise are removed, linear equalization and waveform shaping is performed.

The synchronous detector 5 detects a frame synchronous signal among digital signals and finds a head position of each frame. At this time, the PLL 6 generates a continuous pulse sequence to the synchronous detector 5 and the DSP 7. Will be supplied.

The DSP 7 demodulates the EFM signal to generate parity for detecting digital audio data and error correction, and outputs PWM signals L and R of left and right channels, and the digital / analog converter 8 generates the digital PWM signal. Is converted into an analog signal (OUT _L , OUT _R ) and output.

The servo unit 10 includes a tracking servo, a focusing servo, and a rotating servo. The servo unit 10 controls tracking and focusing of the optical pickup and rotation of the compact disc, and the driving unit 9 includes the servo unit 10. According to the control command of the spindle motor (2a) and the thread motor (2b) are driven respectively.

In this case, the memory 12 stores digital data processed by the DSP 7 and the like, and the central processing unit (CPU) 11 controls user input / output operations or operations of the components.

2 is a schematic configuration diagram of a conventional memory MP3 player. The memory type MP3 player includes: an MP3 mechanism unit 21 for mechanically processing reproduction and storage operations of MP3 audio data; An input / output interface 22 for performing input / output according to a user's operation command; A DSP (23) for compressing and decompressing signals for the storage and reproduction operation; A flash memory 25 for storing data processed by the DSP 23; A D / A converter 26 for converting digital data of left and right channels processed by the DSP 23 into an analog signal; And an MP3 microcomputer 24 for controlling all operations of the components.

The difference between the MP3 player and the aforementioned CDP is as follows. First, the MP3 player uses MP3 data instead of PWM data, downloads MP3 data from a PC or the like instead of CD, which is a storage medium of CDP, and stores the MP3 data in flash memory 25 to reproduce the MP3 data. The above-described operation of the DSP, the D / A converter, and the like and the audio data output are similar to both the CDP and the MP3 player. The conventional memory MP3 player uses a small capacity flash memory 25 of about 16MB to 64MB and can store about 5 to 15 songs. It is also expensive to manufacture and can only play MP3 files.

The conventional memory MP3 player uses a small amount of flash memory, and thus has a problem that the storage capacity is insufficient, and only the MP3 file can be played, and the price is high.

In addition, the conventional CDP cannot play MP3 files, and in the case of a vehicle CDP, there is a problem in that there is no measure for preventing data errors due to vibration or the like.

Accordingly, the present invention has been made to solve the conventional problems as described above, the first object of the present invention is to provide a CDP having an MP3 module capable of playing both an audio CD file and an MP3 file recorded on a CD. It is to provide.

In addition, a second object of the present invention for solving the above problems is to provide a CDP having an MP3 module that can greatly improve the storage capacity by replacing the storage medium with a CD.

In addition, a third object of the present invention for solving the above problems is to provide a CDP having an MP3 module that can prevent data errors due to vibration in a vehicle or a portable CDP.

In addition, a fourth object of the present invention for solving the above problems is, by implementing the signal processing operation of the MP3 file using a special-purpose application specific semiconductor (ASIC), MP3 player device that can realize the price reduction and miniaturization of the MP3 player It is to provide.

In addition, a fifth object of the present invention for solving the above problems is to supplement a portable MP3 player system, to provide an MP3 player that can play a CD ROM disk used in a PC as it is.

As a means for achieving the above object, a CDP having an MP3 module according to the present invention, in a CDP having a microcomputer, a digital signal processor and a digital / analog converter, has a pulse code after decoding the MP3 data read from the CD. And an MP3 module for converting and outputting the modulated data.

And a multiplexer for selecting and outputting data output from the digital signal processor of the CDP and pulse code modulation data output from the MP3 module.

The MP3 module includes: MP3 signal processing means for descrambling data recorded on the CD, and detecting and correcting an error; An MP3 decoder for decoding the MP3 data into pulse code modulation data; Storage means for buffering the data according to the descrambling and for buffering the MP3 data to be decoded; And MP3 control means for bidirectionally communicating with the microcomputer of the CD player and controlling the MP3 module.

Preferably, the MP3 signal processing means is made of a single chip by an ASIC, and the MP3 signal processing means comprises: a synchronization signal processor for detecting a synchronization signal included in the MP3 data; A descrambler that descrambles MP3 data transmitted from the digital signal processor of the CDP; And an error detection / correction unit for detecting and correcting an error included in the MP3 data.

The synchronization signal processor may include a timing generator configured to generate a reference clock for use in the entire MP3 module; And a sync signal separator for searching for a sync signal of the MP3 data frame and notifying the start and end of the frame.

The error detection / correction unit may include: an error detection unit that detects an error included in MP3 data for each frame read from the CD; An error correction unit that corrects an error using an error correction code corresponding to the detected error; And an address generator for generating an address of the MP3 data to be detected and corrected.

The error detection unit preferably calculates a cyclic redundancy check for all bytes except the synchronization signal byte in one frame, and compares the error detection code with the error detection code to determine whether there is an error.

Preferably, the controller further comprises a control / status register for generating an error and displaying a status required for storing and controlling a control command of the MP3 control means.

The storage means is a dynamic RAM (DRAM), and the MP3 control means, if the CD is bad reading, it is preferable to perform the read again using the MP3 signal processing means.

Further, as a means for achieving the above object, an MP3 player capable of playing a CD according to the present invention comprises: optical pickup means for tracking and detecting a CD in which MP3 data is recorded; Signal processing means for descrambling the MP3 data detected by the optical pickup means; A decoder for converting the descrambled MP3 data into pulse code modulation data; And control means for controlling the operation according to the reproduction of the MP3 data.

The signal processing means is preferably made of a single chip by the ASIC.

The signal processing means includes: a synchronization signal processing unit for detecting a synchronization signal included in the MP3 data; A descrambler that descrambles MP3 data read from the CD; And an error detection / correction unit for detecting and correcting an error included in the MP3 data.

The synchronization signal processing unit includes a timing generator for generating a reference clock for use throughout the system; And a sync signal separator for searching for a sync signal of the MP3 data frame and notifying the start and end of the frame.

The error detection / correction unit may include: an error detection unit that detects an error included in MP3 data for each frame read from the CD; An error correction unit that corrects an error using an error correction code corresponding to the detected error; And an address generator for generating an address of the MP3 data to be detected and corrected.

The error detection unit preferably calculates the seed information for all bytes except the sync signal byte in the one frame, and compares the error detection code with the error detection code to determine whether there is an error.

Preferably, the control unit further comprises a control / status register for occurrence of the error, a status indication necessary for storing and controlling a control command of the MP3 control unit, and the storage unit is preferably a DRAM.

Preferably, the control means reads again using the MP3 signal processing means when the CD read is bad.

Further, as a means for achieving the above object, the control method of the CDP with the MP3 module according to the present invention, in the control method of the CD player comprising a microcomputer, a digital signal processor, a digital / analog converter and an MP3 module, A first step of decoding MP3 data read from the CD and converting the converted MP3 data into pulse code modulated data; And a second step of selecting and outputting data output from the digital signal processor of the CD player and pulse code modulation data output in the first step.

The first step may include: a first substep of descrambling data recorded on the CD, and detecting and correcting an error; A second substep of decoding the MP3 data into pulse code modulation data; And a third sub-step of buffering the data according to the descrambling and buffering the MP3 data to be decoded.

If the CD is poor in reading, the method further includes a fourth sub-step of reading again.

The first sub-step may include: a synchronization signal detecting step of detecting a synchronization signal included in the MP3 data; Descrambling MP3 data transmitted from the digital signal processor of the CD player; And an error detection / correction step of detecting and correcting an error included in the MP3 data.

The detecting of the synchronization signal may include generating a reference clock for use in the entire MP3 module; And notifying the start and end of the frame by finding a synchronization signal of the MP3 data frame.

The error detection / correction step may include: an error detection step of detecting an error included in MP3 data for each frame read from the CD; An error correction step of correcting an error using an error correction code corresponding to the detected error; And generating an address of the MP3 data to detect and correct the error.

In the error detection step, it is preferable to calculate a seed for all bytes except the synchronization signal byte in one frame, and determine whether or not an error is compared with an error detection code.

In addition, as a means for achieving the above object, a control method of an MP3 player capable of playing a CD according to the present invention, the first step of tracking and detecting the CD recorded MP3 data; Descrambling the detected MP3 data, and detecting and correcting an error; And a third step of converting the descrambled MP3 data into pulse code modulation data.

If the CD is bad read, the method further includes a fourth step of performing read again.

The second step may include: a first substep of detecting a synchronization signal included in the MP3 data; A second substep of descrambling MP3 data read from the CD; And a third substep of detecting and correcting an error included in the MP3 data.

The first substep may include generating a reference clock for use throughout the system; And notifying the start and end of the frame by finding a synchronization signal of the MP3 data frame.

The third sub-step may include: an error detecting step of detecting an error included in MP3 data of each frame read from the CD; An error correction step of correcting an error using an error correction code corresponding to the detected error; And an address generating step of generating an address of the MP3 data to be detected and corrected.

In the error detection step, it is preferable to calculate a seed for all bytes except the synchronization signal byte in one frame, and determine whether or not an error is compared with an error detection code.

The CDP including the MP3 module according to the present invention is a CD player including a microcomputer, a digital signal processor, and a digital / analog converter. The MPP decodes the MP3 data read from the CD and converts the MP3 data into pulse code modulated data. The module is additionally provided to select and output data output from the digital signal processor of the CD player and pulse code modulation data output from the MP3 module through a multiplexer. In the MP3 module, the MP3 signal processing means descrambles the data recorded on the CD, detects and corrects an error, and then the MP3 decoder decodes the MP3 data into pulse code modulated data, and the storage means Intermediate buffering of the data according to descrambling, buffering the MP3 data to be decoded, and the MP3 control means communicates with the microcomputer of the CD player in both directions, and controls the MP3 module. As a result, both CD data and MP3 data can be reproduced, and error detection and correction included in the MP3 data can be performed.

Hereinafter, a CDP having an MP3 module according to an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 3, the CDP having the MP3 module according to the embodiment of the present invention is configured such that the automotive audio CDP 100 includes the MP3 module 200 and the automotive audio CDP 100. The input and output interface 110 for the user input and output audio reproduction operation, etc .; A DSP 130 for decoding audio CD data; A first multiplexer (MUX # 1) 140 for selecting and outputting audio CD data or MP3 data; An audio D / A converter 150 for converting a digital signal output from the first multiplexer 140 into an analog signal; Tape player / radio 160 for performing cassette tape or radio functions; A CDP mechanism unit 170 including an optical pickup unit, a deck, and the like, for performing a mechanical operation for CD reproduction; A second multiplexer (MUX # 2) 180 that selectively amplifies the output of the audio D / A converter 150 or the tape player / radio and outputs audio at an audible frequency; And a CDP microcomputer 120 for controlling the components for playing an audio CD, wherein the MP3 module 200 descrambles the MP3 data recorded on the CD, and detects an error included in the MP3 data. MP3 signal processing unit 220 to correct by correcting; An MP3 memory 240 buffering the data according to the descrambling or buffering the MP3 data to be decoded; An MP3 decoder (250) for decoding the MP3 data into pulse code modulation data; And an MP3 micom 210 that bidirectionally communicates with the CDP micom 120 and controls the components for MP3 data reproduction.

The CDP having the MP3 module reads data from CD or CDs on which MP3 data is recorded, and performs audio output by processing a descramble signal according to each of them. The control program must be replaced. In addition, the MP3 signal processor 220 in the MP3 module 200 performs descrambling of the CD, error detection and correction, conversion of PCM data into MP3 data, and adjustment of data buffer levels. At this time, the MP3 signal processor 220 is ASIC for miniaturization and price reduction.

FIG. 6 is a flowchart illustrating a method of controlling a CDP having an MP3 module according to an exemplary embodiment of the present invention, with reference to the device configuration shown in FIG.

Referring to FIG. 6, when a user inputs an operation command by pressing a key button after inserting a CD for MP3 data reproduction or CD data reproduction (S10), when the data is CD data (S20), the optical pickup unit It is driven to read the CD data from the CD (S30).

Analog waveform shaping is performed from the signal detected by the optical pickup unit (S40), and the synchronization signal contained in the CD data is detected (S50). Next, the DSP 130 converts the EFM signal into a PWM signal (S60).

If the data is MP3 data (S70), the optical pickup unit is driven to read the MP3 data from the CD (S80). The read data is descrambled by the MP3 signal processor 220, and signal processing for detecting and correcting an error is performed (S90). Next, the MP3 data is decoded into PWM data by the MP3 decoder 250 (S100). At this time, the data generated during error detection and correction and the MP3 data decoded are stored in the DRAM 240 which is a memory.

4 is a diagram illustrating signal processing of a CDP having an MP3 module according to the present invention. As shown in FIG. 4, the MP3 module is substantially implemented using signals to be described below, and its function will be briefly described as follows.

First, the transmission signal Tx is a data line sent from the MP3 micom 210 to the CDP micom 120, and the received signal Rx is a data line sent from the CDP micom 120 to the MP3 micom 210. The 120 and 210 may directly communicate with each other.

Of the signals sent from the CD DSP 130 to the MP3 signal processor 220, BCLK is a clock for separating bits of serial data, SDAT is a serial data line, and WS is a left channel (Left) or right channel (Right) audio signal. In this case, C2PO is a signal indicating that data includes an error, and the signals are all signals generally used in the DSP 130 of the CDP 100.

In addition, the analog audio sent from the MP3 decoder 250 to the first multiplexer (MUX # 1) is divided into R-Audio and L-Audio, and R-Audio and L-Audio are baseband analog right channel and left channel audio, respectively. It is a signal.

Also, among the signals for the interface between the MP3 signal processor 220 and the MP3 memory 240, Data is a data line of a DRAM which is the MP3 memory 240, Address is a DRAM address line, RAS is a raw address strobe line, and CAS is Column Address Strobe line. WE represents the write enable line, and OE represents the output enable line.

Among the signals for the interface between the MP3 microcomputer 210 and the MP3 signal processor 220, Mdata represents a data signal, A0 to A5 represent an address select address line, CS represents a chip select signal, and WE not shown write enable. Line, OE, shows the output enable line.

Among the signals between the MP3 signal processor 220 and the MP3 decoder 250, Data denotes an MP3 serial data line, and Rdy denotes a request signal of the MP3 decoder.

In FIG. 6, a signal digitally processed by the DSP 130 in the CDP 100 or data decoded by the MP3 decoder 250 in the MP3 module 200 is input to the first multiplexer 140.

The digital data output by the selection of the first multiplexer 140 is converted into an analog signal (S110), and then amplified at an audible frequency to output an audio signal (S120).

Meanwhile, the MP3 microcomputer 210 may communicate with the CDP microcomputer 120. In addition, the MP3 microcomputer 210 transmits a data read command for each minute, second, and frame, and performs data communication for key / remote control input and LCD display. In addition, time continuity check and read back control are possible, and memory buffer management and MP3 memory 240 buffer management are performed. When the CD read is bad due to scratching or the like, the read again control is performed again by the control of the MP3 microcomputer 210. At this time, the read again is possible by the error detection / correction of the MP3 signal processor 220. .

5 is a detailed configuration diagram of the MP3 signal processing unit according to the present invention, and FIG. 7 is an operation flowchart of the control method, which will be described in parallel below.

In practice, the MP3 signal processor 220 is implemented as an ASIC for miniaturization and cost reduction. First, a timing generator 221 receives a 16.9344 MHz input (CLK) from the outside to generate a reference clock for use throughout the MP3 module system. The sync comparator 223 finds the 12-byte sync signal at the head of the MP3 audio data frame and informs the start and end of the frame. If the next synchronization signal is not detected after 2352 bytes after the synchronization signal is detected, an error state is displayed (S91).

The CDP interface 222 receives signals such as CLK, BCLK, and C2PO from the CD DSP 130 as serial data and generates 16-bit parallel data arrays (S92). The descrambler 225 descrambles the MP3 data reproduced from the CD (S93). At this time, a pattern such as a synchronization signal pattern should not appear in the data detected from the CD. Here, scrambling refers to an apparatus that encrypts or encodes a given signal in a proper manner so that the general receiver is not understood, but the descrambling refers to a device for returning a given signal to a state before being scrambled.

The error detection module 226 checks whether an error is included in one frame data read from the CD (S94), that is, CRC (Cyclic Redundency) with all bytes except 12 bytes of sync signal bytes in one frame. After the check is calculated, it is compared with an error detection code included in the data to determine whether there is an error.

If it is determined that the error is an error from the error detection result, the error correction module 227 performs error correction using an error correction code included in the frame (S95). In this case, the decoding address generator 231 generates an address for error detection and error correction.

The MP3 microcomputer interface 228 is an interface between the MP3 microcomputer 210 and the MP3 signal processor 220 that controls the MP3 player as a whole. The MP3 microcomputer interface 228 reads and writes the status register and the control register 224 of the MP3 microcomputer 210. (S96). The state and control registers 224 are registers for indicating various error occurrence states in the MP3 signal processing unit 220 and states required for controlling the MP3 microcomputer 210 and registers for receiving and storing instructions from the microcomputer.

Next, the DRAM control unit 229 controls the address and data necessary for refreshing and accessing the DRAM 240 (S97), and allows the DRAM bus to be shared during the error correction and detection operation and MP3 data transfer. .

Next, the MP3 decoder interface 223 allows the MP3 decoder 250 for converting the MP3 data, which has been completed with CD decoding and error correction, to PCM data, to be connected (S98). At this time, data is read from the buffer of the DRAM 240 and serially converted to the MP3 decoder 250 for transmission. The MP3 data buffer address generator 232 generates the read and write addresses of the buffer that stores the data to be transmitted to the MP3 decoder 250.

Meanwhile, in the present invention, the CDP microcomputer 210 replaces a program to support a CD ROM for MP3, thereby supporting both audio CD data and MP3 data on the CD ROM. Therefore, the present invention can be used for automobile CDP, home CDP and the like. For example, an automotive CDP uses a typical automotive CDP, and adding hardware requires a small amount of hardware, i.e. use of general purpose I / O pins, use of CD DSP signal connectors, and audio D / A. Using a multiplexer that provides an input signal to the converter, audio CD data or MP3 decoded data can be selected and output.

The CDP equipped with the MP3 module according to the present invention can play both MP3 files recorded on an audio CD and a CD ROM, and it is possible to reduce the cost and size of the entire system by using an ASIC. Data errors can be prevented.

In addition, in the case where a scratch occurs on the disk and a read failure occurs, the read may be performed again by the MP3 microcomputer and the signal processor.

In addition, the portable MP3 player system can be supplemented to play the CD used in the PC as it is, and the storage capacity can be greatly improved by replacing the storage medium with the CD.

In addition, since a CD is used as a storage medium, a CDP for home, portable, and car can be used, thereby reducing the cost burden compared to using a separate CD ROM driver.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Of course, such changes are intended to fall within the scope of the claims set forth.

Claims (33)

In a compact disc player having a microcomputer, a digital signal processor and a digital-to-analog converter, And an MP3 module for decoding MP3 data read out from the compact disc and converting the MP3 data into pulse code modulation data. And a multiplexer for selecting and outputting data output from the digital signal processor of the compact disc player and pulse code modulation data output from the MP3 module. The MP3 module, MP3 signal processing means for descrambling the data recorded on the compact disc, and detecting and correcting an error; An MP3 decoder for decoding the MP3 data into pulse code modulation data; And Storage means for buffering the data according to the descrambling and buffering the MP3 data to be decoded; And And an MP3 control means for bidirectionally communicating with the microcomputer of the compact disc player and controlling the MP3 module. The MP3 signal processing means, A synchronization signal processor detecting a synchronization signal included in the MP3 data; A descrambler that descrambles MP3 data transmitted from the digital signal processor of the compact disc player; And Error detection / correction for detecting and correcting the error contained in the MP3 data, The error detection / correction unit, An error detection unit for detecting an error included in the MP3 data for each frame read out from the compact disc; An error correction unit that corrects an error using an error correction code corresponding to the detected error; And And an address generator for generating an address of the MP3 data to be detected and corrected by the error. delete delete According to claim 1, The MP3 signal processing means is a compact disc player having an MP3 module, characterized in that it is made of a single chip of a specific application specific semiconductor (ASIC). delete The method of claim 1, wherein the synchronization signal processing unit, A timing generator for generating a reference clock for use throughout the MP3 module; And And a MP3 module including a sync signal separator for searching for a sync signal of the MP3 data frame and notifying the start and end of the frame. delete According to claim 1, The error detection unit includes an MP3 module that calculates a Cyclic Redundancy Check for all bytes except the sync signal byte in the one frame, and compares the error detection code with an error detection code. Compact disc player. According to claim 1, And a MP3 module configured to further include a control / status register for generating an error, and displaying a status required for storing and controlling a control command of the MP3 control means. According to claim 1, And said storage means is a dynamic random access memory (DRAM). According to claim 1, The MP3 control means includes a MP3 module, wherein the MP3 module reads the data again using the MP3 signal processing means when the compact disc has a bad read. For MP3 player, Optical pickup means for tracking and detecting a compact disc on which MP3 data is recorded; Signal processing means for descrambling the MP3 data detected by the optical pickup means; A decoder for converting the descrambled MP3 data into pulse code modulation data; And Control means for controlling the operation according to the reproduction of the MP3 data, The signal processing means, A synchronization signal processor detecting a synchronization signal included in the MP3 data; A descrambler that descrambles MP3 data read out from the compact disc; And Error detection / correction for detecting and correcting the error contained in the MP3 data, The error detection / correction unit, An error detection unit for detecting an error included in the MP3 data for each frame read out from the compact disc; An error correction unit that corrects an error using an error correction code corresponding to the detected error; And And an address generator for generating an address of the MP3 data to be detected and corrected. 16. An MP3 player capable of reproducing a compact disc. The method of claim 12, The signal processing means is an MP3 player capable of playing a compact disc, characterized in that it is made of a single chip of a specific application specific semiconductor (ASIC). delete The method of claim 12, wherein the synchronization signal processing unit, A timing generator for generating a reference clock for use throughout the system; And An MP3 player capable of playing a compact disc comprising a synchronization signal separating unit for searching for the synchronization signal of the MP3 data frame and notifying the start and end of the frame. delete The method of claim 12, And the error detecting unit calculates the seed information for all bytes except the sync signal byte in the one frame, and compares the error detection code with an error detection code to determine whether or not an error is present. The method of claim 12, And an MP3 player capable of playing the compact disc further comprising a control / status register for the error occurrence, a status indication necessary for storing and controlling the control command of the MP3 control means. The method of claim 12, The storage means, MP3 player capable of playing a compact disc, characterized in that the dynamic RAM. The method of claim 12, The control means, MP3 player capable of playing back the compact disc, characterized in that to read again by using the MP3 signal processing means, if the compact disc is bad reading. In the control method of a compact disc player comprising a microcomputer, a digital signal processor, a digital-to-analog converter and an MP3 module, A first step of decoding the MP3 data read out from the compact disc, converting the MP3 data into pulse code modulation data, and outputting the pulse code modulation data; And And a second step of selecting and outputting data output from the digital signal processor of the compact disc player and pulse code modulation data output in the first step, The first step, A first substep of descrambling the data recorded on the compact disc, and detecting and correcting an error; A second sub-step of decoding the MP3 data into pulse code modulation data; And And intermediately buffering the data according to the descrambling, and buffering the MP3 data to be decoded. The first substep is, A synchronization signal detecting step of detecting a synchronization signal included in the MP3 data; Descrambling MP3 data transmitted from the digital signal processor of the compact disc player; And An error detection / correction step of detecting and correcting an error included in the MP3 data; The error detection / correction step, An error detection step of detecting an error included in the MP3 data for each frame read out from the compact disc; An error correction step of correcting an error using an error correction code corresponding to the detected error; And Generating an address of MP3 data to detect and correct the error; In the error detecting step, the CD is calculated for all bytes except the sync signal byte in one frame, and the error is determined by comparing with the error detection code. Way. delete delete The method of claim 21, wherein the detecting of the synchronization signal comprises: Generating a reference clock for use throughout the MP3 module; And And a step of notifying the start and end of the frame by finding a synchronization signal of the MP3 data frame. delete delete The method of claim 21, And a fourth sub-step of re-reading if the compact disc is poor in reading. The method of claim 1, further comprising an MP3 module. In the MP3 player control method, A first step of tracking and detecting the compact disc on which the MP3 data is recorded; Descrambling the detected MP3 data, and detecting and correcting an error; And And a third step of converting the descrambled MP3 data into pulse code modulation data. The second step, A first substep of detecting a synchronization signal included in the MP3 data; A second substep of descrambling the MP3 data read out from the compact disc; And And a third substep of detecting and correcting an error included in the MP3 data. The third substep is, An error detection step of detecting an error included in the MP3 data for each frame read out from the compact disc; An error correction step of correcting an error using an error correction code corresponding to the detected error; And And an address generating step of generating an address of the MP3 data to be detected and corrected, wherein the MP3 player can reproduce a compact disc. delete The method of claim 28, wherein the first substep is Generating a reference clock for use throughout the system; And And a method of controlling an MP3 player, comprising: finding a synchronization signal of the MP3 data frame and notifying the start and end of the frame. delete The method of claim 28, In the error detecting step, an MP3 player capable of playing a compact disc, characterized in that it calculates a seed for every byte except the sync signal byte in one frame and compares the error detection code with an error detection code. Control method. The method of claim 28, And a fourth step of performing read again if the compact disc is poor in reading. The MP3 player can control the MP3 player.

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