KR980011366A - Improved Compact Disc Player - Google Patents

Abstract

The present invention relates to an improved compact disc player, and a conventional compact disc player includes a storage unit (26) for storing data of a lead-in area to be read out when loading a disc (D); A microcomputer for reading the time data from the digital signal provided from the digital signal processing unit 16 at the time of reproduction and generating a control signal immediately before the start of each track to output the data for the title for the track, (24); A character decoder 28 for character processing and outputting data of a title provided from the storage unit 26; And a display unit (30) for displaying a character signal provided from the character decoder (28). By displaying the title of the track currently being played back, the effect of allowing the user to easily recognize the title of the track currently being played have.

Description

Improved Compact Disc Player

1 shows a format of a data frame recorded on a typical compact disc;

2 is a block diagram of a configuration of an improved compact disc player according to the present invention;

DESCRIPTION OF THE REFERENCE NUMERALS

10: motor and motor driving unit 12: optical pickup unit

14: RF and servo signal processing unit 16: digital signal processing unit

18: servo control unit 20: D / A converter

22: Audio signal output unit 24: Microcomputer

26: storage unit 28: character decoder

30:

The present invention relates to a compact disc player, and more particularly, to an improved compact disc player capable of displaying the title of data recorded on each track of a disc when playing back from a compact disc.

2. Description of the Related Art [0002] With the development of audio media for recording and reproducing predetermined audio data, audio data has recently been recorded on an optical disk having a diameter of 12 cm, and a compact disc player (CDP : compact disk player) has been developed and widely used, and there is a tendency that it continues to develop to improve its performance.

On the other hand, such a compact disc player reproduces a voice recorded on an optical disc and outputs the reproduced voice through a speaker. Thus, it is possible to reproduce a signal with better sound quality due to a higher signal-to-noise ratio than conventional voice recoding apparatuses, The optical disk having no disturbance, no ghost, random access, and recording audio data, that is, a compact disk has a semi-permanent life span And it is in widespread use.

In a compact disk used for playback in such a conventional compact disk player, data of the same type is recorded separately for each track. For example, if the data recorded on the compact disc is songs, the data is recorded in each track divided into titles of songs, that is, songs.

Meanwhile, when reproducing a compact disc containing a plurality of such songs, the user does not know the title of the song. In this case, the user has to check the title of the song written on the disk case to know the title of the song. There were some inconveniences in use.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems and it is an object of the present invention to provide an improved compact disc capable of displaying the title of a track representing the contents of data recorded on each track, Player.

According to an aspect of the present invention, there is provided an optical pickup apparatus including an optical pickup unit for reading data recorded on a disk and outputting a corresponding RF signal, A servo control unit for generating a control signal in accordance with a servo signal provided from the RF and servo signal processing unit; and a control unit for controlling the focus on the disk according to a servo signal provided from the servo control unit, And a motor for driving and servoing the RF signal and the servo signal; a digital signal processing unit for digitally processing the amplified RF signal provided from the RF and servo signal processing unit; a digital signal processor for converting the output signal of the digital signal processing unit into an analog signal; / Analog converter and a digital-to-analog converter A title of data recorded in each track of the disc is recorded in a lead-in area of the disc, and a title of data recorded on the disc is read out A storage unit for storing data in a lead-in area; and a control unit for reading time data in the digital signals provided from the digital signal processing unit during reproduction to generate a control signal immediately before the start of each track, And a display unit for displaying character signals provided from the character decoder when the title data is provided from the storage unit and for outputting the processed data.

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

1 shows a format of a data frame to be recorded in a lead-in area of a disc.

Generally, in a lead-in area (LIA), disc information such as start time of each track and data on the entire play time of the disc is recorded, which is referred to as TOC data. That is, the data recorded in the lead-in area shown in FIG. 1 is repeatedly recorded a predetermined number of times in case the data is damaged.

In addition, CONTROL is made up of all four bits and defines the kind of information recorded in each track, typically two bits are used and two bits are designated as spare bits.

That is, in order to implement the present invention, at the time of making a disc, a title to be recorded is recorded in Korean and English fonts using the reserved 2 bits of CONTROL in one of the data repeatedly recorded in the lead- , MIN is used as an index of the title, and Korean characters are allocated 2 bytes per character by using SEC, FRAME, ZERO, PMIN, PSEC and PFRAME, and 1 byte per character in English.

2 is a block diagram of an improved compact disc player according to a preferred embodiment of the present invention and includes a motor and motor driving unit 10, an optical pickup unit 12, an RF and servo signal processing unit 14, a digital signal processing unit 16 A servo controller 18, a digital / analog converter (D / A) 20, an audio signal output unit 22, a microcomputer 24, a storage unit 26, a character decoder 28, (30).

When the disc D recorded with the TOC data in the lead-in area for each track as described above is loaded in the disc tray (not shown), first, the optical pickup part 12 records the lead- The RF and servo signal processing unit 14 reads out the TOC data recorded in the optical pickup unit 12 and the data of the title of each track and outputs the data to the RF and servo signal processing unit 14 as an RF signal, And outputs the servo signals to the servo control unit 18 for the focus and tracking servo.

The digital signal processing unit 16 performs error correction and digital signal processing on the signals provided from the RF and servo signal processing units and provides them to the microcomputer 24 and provides the spindle servo signals to the servo control unit 18.

The servo control unit 18 provides the servo and control signals corresponding to the servo signals provided from the RF and servo signal processing unit 14 and the digital signal processing unit 16 to the motor and motor driving unit 10 to perform tracking, focus, and spindle servo This process is also performed when audio data recorded on the disc D is reproduced.

The microcomputer 24 provides TOC data provided from the digital signal processor 16 and data and control signals for the titles of the respective tracks to the storage unit 26 so that the storage unit 26 stores the signals .

After this process is performed, when a playback key signal is input from a key input unit (not shown), playback is sequentially performed from a predetermined selected track and the first track. At this time, the microcomputer 24 extracts the time data at the current playback position, that is, the Q data (Q data) in the playback data output from the disc through the optical pickup unit 12, the RF and servo signal processing unit 14, And generates a control signal to the storage unit 26 and the character decoder 28 immediately before the beginning of each track.

Accordingly, the storage unit 26 outputs to the character decoder 28 data on the title of the track to be reproduced at present, from among the stored data, and the character decoder 28 character-processes the data and outputs the processed data to the display unit 30 , The display unit 30 displays it as a character so that the user can recognize the title of the track being reproduced.

At the same time, the D / A converter 20 is a digital signal processing unit 20. In the present invention, the storage unit 26 is a RAM and the display unit 30 is a liquid crystal display (LCD) ) Or a light emitting diode.

Therefore, the present invention has the effect of allowing the user to easily recognize the title of the currently playing track by displaying the title of the track currently being played back during playback.

Claims (3)

An optical pickup unit 12 for reading data recorded on a disk and outputting an RF (radio frequency) signal according to the read RF signal, and an RF circuit for amplifying an RF signal provided from the optical pickup unit 12 and processing a servo signal A servo control unit 18 for generating a control signal in accordance with the servo signal provided from the RF and servo signal processing unit 14 and a servo control unit 18 for driving the servo control unit 18 in accordance with a servo signal provided from the servo control unit 18 A motor driving unit 10 for performing focus and tracking servo on the disk, a digital signal processing unit 16 for digitally processing the amplified RF signal provided from the RF and servo signal processing unit 14, A digital-to-analog converter 20 for converting an output signal of the digital signal processor 16 into an analog signal, an analog-to-digital converter 20 for converting the analog signal provided from the digital- The title of the data recorded on each track of the disc D is recorded in the lead-in area of the disc D, and the title of data recorded on the disc D is recorded in the lead-in area of the disc D, D) storing data of a lead-in area to be read out upon loading; Time data in the digital signals provided from the digital signal processing unit 16 at the time of reproduction and generates a control signal immediately before the start of each track so that the storage unit 26 outputs data for the title of the track A microcomputer (24) A character decoder 28 for character processing and outputting data of the title provided from the storage unit 26; And a display unit (30) for displaying a character signal provided from the character decoder (28). 2. The improved compact disc player according to claim 1, wherein the storage unit (26) comprises a RAM. The improved compact disc player according to claim 1, wherein the display unit (30) comprises a light emitting diode or a liquid crystal display. ※ Note: It is disclosed by the contents of the first application.