KR20000020655A - Compact disk for karaoke equipment and playback method thereof - Google Patents

Abstract

PURPOSE: A compact disk for karaoke equipment is provided to record a great number of musics by recording only impact audio bit stream data and to improve the quality of sound by recording a lyric rhythm data. CONSTITUTION: An optical pick-up(201) emits an optical beam to a disk(200) and reads data from the disk(200), and outputs a high frequency signal. A high frequency amplifying unit(202) amplifies the high frequency signal read in the optical pick-up(201). A digital signal processing unit(203) extracts a focus error signal and a tracking error signal from the high frequency signal and demodulates 14 bits digital signal as 8 bits digital data, and detects a sub-code with reference to the demodulated data serial. A receiving/display unit(212) receives an infrared ray signal inputted from a remote controller(211), combines the received infrared ray signal and displays each function condition of video music accompaniment device. A microprocessor(204) generates a control signal for moving the optical pick-up(201) and rotating the disk(200) according to a key data inputted from the receiving/display unit(212).

Description

Compact half-sized compact disc and how to play it

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact disc used for an image flexible half cycle and a control method for recording and playing back audio data on the compact disc. More specifically, Moving Picture Experts Group (MPEG) audio data and the audio are recorded on a compact disc. The present invention relates to a compact disc for video flexible half-cycle and a method of reproducing the disc for recording lyrics and beat data corresponding to the above to further improve sound field and sound quality during reproduction, and to simplify the production of a compact disc.

The data format of a compact disc, which is usually used for the half-cycle of a video, will be described with reference to FIG. 1, which shows a general video CD format structure. Read in / lead out area 11/13 and program area 12 having CD-ROMXA data encoded with an empty sector of mode 2 / form 2 at the origin and outside ).

The program area 12 is formed next to the read-out area 11 and is described in the Compact Disc Bridge System Description, which is largely the pathname of the interactive compact disc (CD-I) application program. Volume descriptor including the (path name) and karaoke (KARAOKE) basic data that records data such as song name, singer name, composer, and writer, and CD-RTOS when playing a disc of this standard with a CD-I / FMV player. Application area 12a for recording various information about the program area 12, such as an application program required for bridging, which is operated by (Real Time Os), and MPEG data for recording MPEG video and audio data. It consists of an area 12b.

Here, the read-in area 11 records the number of songs, the time of each song, the total time, the first part of each song, the index part, and the like, and the non-read area 13 records that the program is finished.

In addition, in the MPEG data area 12b of FIG. 1, as shown in FIG. 2, each track except for the first track has a header in which various coding information is recorded in a predetermined byte, and also the MPEG video sector V and the MPEG The audio sector A is mixed and recorded at a ratio of 6: 1.

3 is a block diagram of an image flexible half-cycle according to the prior art.

The image flexible half cycle includes an EFM (Eight to Fourteen Modulation) demodulator 100 for converting and outputting 14-bit digital signals read and input from a compact disc into 8-bit, and correcting and demodulating and outputting recorded data; A demodulator 101 for demodulating the sector interleave for a compact disc ROM (CD-ROM) by receiving the demodulated signal; and demultiplexing the demodulated sector unit data to obtain video data and audio data. Central processing unit (102) for separately outputting, the first memory 103 and the second memory (104) for storing the separated output video data and audio data, respectively, and the stored video data and audio data MPEG The system time is controlled by control signals of the MPEG video decoder 105 and MPEG audio decoder 106 to be decoded and outputted, and the central processing unit 102. A clocking system time clock unit 109, a video output unit 107 and an audio output unit 108 for comparing the system time clock and PTS (Presentation Time Sfamps) in the bit stream, and are not shown in the figure. The system control unit 112 and the system control unit 112 that control the entire EFM demodulation unit 100, the demodulation unit 101, and the MPEG decoder unit 115 in accordance with a key signal input from the keypad. The digital video data and audio data output from the video output unit 107 and the audio output unit 108 are converted into analog signals, and then the complete video is output through the output terminals 113, 114 and buffers and speakers. And a video digital / analog converter 110 and an audio digital / analog converter 111 for outputting signals and audio signals.

The image flexible half cycle according to the prior art configured as described above will be described in detail with reference to FIGS. 1 to 3.

First, the pick-up area 11 of the video compact disc and the application program area 12a of the program area 12 and the MPEG data area 12b for recording MPEG video and audio data are picked up. -up) scan in order to read various data.

Various data read through the pickup are input to the EFM demodulator 100.

The EFM demodulator 100 converts 14-bit digital data of an image flexible half-cycle video compact disc input from the pickup into 8-bit.

In other words, in general, a video compact disc is divided into 8 bits + 8 bits with a 16 bit signal in order to prevent the minimum unit length of the pit from being very short.

Therefore, in order to demodulate the original signal, the above-described EFM demodulator 100 converts the 14-bit data read from the pickup into 8-bit, corrects errors of the compact disk, and then sends the demodulator 101 which is a compact disk ROM decoder. Demodulate the data that was sent and interleaved during encoding.

The demodulated data in the demodulator 101 is provided to the central processing unit 102 of the MPEG decoder 113.

The central processing unit 102 separates the video data and the audio data from the mixed data inputted through the demodulator 101 by mixing and recording the tracks in sector units at a ratio of 6: 1 as shown in FIG. The separated video data and audio data are stored in the first and second memories 103 and 104, respectively.

In this state, when the user selects through the keypad, video data and audio data stored in the first and second memories 103 and 104 are sent to the MPEG video decoder 105 and MPEG audio decoder 106, respectively. Lose.

The MPEG video decoder 105 and MPEG audio decoder 106 reconstruct the compressed video data and the audio data and provide them to the video output unit 107 and the audio output unit 108, respectively.

The video output unit 107 and the audio output unit 108 compare the STC of the system time clock unit 109 with the PTS in the video / audio data to adjust the presentation time of the output data and to adjust the video digital / analog respectively. After converting the analog signal through the conversion unit 110 and the audio digital / analog conversion unit 111 and outputting the complete video signal and the audio signal through the output terminals 113, 114 and subsequent buffers and speakers. do.

As described above, the video compact disc for video flexible semi-period according to the prior art is produced by mixing and recording MPEG video bit stream data and MPEG audio bit stream data in a sector ratio of 6: 1, which is a video flexible half period. It can be seen that it is used to play through.

However, the conventional video flexible half-cycle video compact disc records only various kinds of information about the program area in a specific area of the program area, for example, the first track, and stores about 6: 1 video data and audio data in the MPEG data area. By making sector-by-sector mixtures, many songs (up to 16 songs) cannot be recorded on a single video compact disc, and mixing and recording audio and video reduces sound field and sound quality during playback. There is a problem in the production of compact discs and inability to cope with new songs.

Accordingly, the present invention excludes the limitation of the number of songs generated by mixing and recording the audio data and the video data, and the deterioration of the sound field and sound quality at the time of reproduction. To provide a video flexible half-cycle compact disc and a method for playing the disc, which record and manufacture only MPEG audio bit stream data on a sector-by-sector basis in a compact disc for half-cycle. There is this.

In another aspect of the present invention, the lyrics data and the beat data of a song related to the audio data of the program area are recorded in a specific area of the compact disc to improve the sound field and sound quality in synchronization with the actual audio data recorded in the program area during playback. The purpose is to make it happen.

Another object of the present invention is to provide a new disc accompaniment for the image flexible accompaniment and the convenience of compact disc production.

1 is a format diagram of a video compact disc according to the prior art,

FIG. 2 is an MPEG video / audio sector interleaving configuration diagram recorded in the program area of FIG. 1;

3 is a block diagram of an image flexible half cycle according to the prior art,

4 is a format configuration diagram illustrating an embodiment provided for describing a compact disc using MPEG audio bit streams according to the present invention;

FIG. 5 is a diagram illustrating a state in which MPEG audio data is interleaved and recorded in sector units in the program area of FIG. 4.

FIG. 6 is a block diagram showing an embodiment provided in the description of a compact disc reproducing apparatus for an image flexible semi-period according to the present invention; FIG.

7 is a signal flowchart of a compact disc reproducing apparatus for an image flexible semi-period according to the present invention.

<Description of Symbols for Main Parts of Drawings>

20: central hole 21: reading area

22: program area 22a: specific area

22b: MPEG data area 23: non-read area

200: disc 201: optical pickup

202: high frequency amplifier 203: digital signal processing unit

204: microprocessor 205: optical servo unit

206: MPEG decoder 207: memory

The above objects are directed to a compact disc having a read / unread area and a program area around an origin:

The compact disc,

(1) dividing the program area into a specific area and a data area, and recording MPEG audio data in the data area in sector units;

(2) Compact for image flexible semi-period according to an aspect of the present invention, characterized in that it has a format configured by recording the information on the data area, the lyrics data of the song associated with the MPEG audio data and the beat data in the specific area Is achieved by the disk.

Optionally, any one track in the program area is selected and designated as the specific area.

Preferably, the first track of the program area proximate to the read-in area is the specific area.

According to another aspect of the present invention, there is provided a method of reproducing audio data of a compact disc for an image flexible semi-period. A method of playing a compact disc having a format in which data is recorded and lyrics and beat data related to the MPEG audio are recorded in the specific area, the composition comprising:

(1) reading and storing lyrics data and beat data of a song recorded in the specific area by moving a pickup during playback of the disc;

(2) selecting and buffering and decoding MPEG audio data from the data area by moving the pickup to a position corresponding to the selected track number;

(3) monitoring the buffer amount of the MPEG audio data while outputting the decoded MPEG audio data as an analog signal in synchronism with the related lyrics data and time signature data while playing the corresponding track of the data area; And

(4) determining whether to continuously read the MPEG audio data according to the monitored buffer amount.

Preferably, the step of determining whether or not to read, if the buffer amount of the MPEG audio data is full, stopping the reading of the audio data from the disk and storing the current track position while maintaining a pause state;

Decoding and outputting the buffered MPEG audio data in the idle state;

And if the buffer amount of the MPEG audio data is lowered by the decoding result, releasing the idle state and reading and playing MPEG audio data from the next track of the current position.

Optionally, the disc type of the read-in area is determined and reproduced in the normal disc mode when the disc is a normal disc.

In this way, the lyrics data of the song corresponding to the audio data and the data related to the beat are recorded in a specific area of the disc, and the mpeg audio data is stored in the disc on which only the MPEG audio data is recorded. It can be seen that it is correctly decoded and reproduced in synchronization with time data.

As a result, by recording only MPEG audio data excluding video data in the program area of the disc, more songs can be recorded, and by recording the lyrics data and time data of the songs related to the MPEG audio data by specifying a specific area, There is an advantage that can realize a more vivid sound field and sound quality during playback.

And, there may be a plurality of embodiments of the present invention, the following will be described in detail for the most preferred embodiment.

Through this preferred embodiment, it is possible to better understand the objects, features and advantages of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the error correction apparatus of the telephone number according to the present invention.

FIG. 4 is a format configuration diagram illustrating an embodiment provided in a description of a compact disc using an MPEG audio bit stream of the present invention, and FIG. 5 illustrates a state in which MPEG audio data is interleaved and recorded in sectors in the program area of FIG. 4. It is the schematic shown.

In the compact disc according to the present embodiment, a lead in / lead out area 21 in which CD-ROMXA data is encoded at the origin and the outside of the center hole 20 of the compact disc, 23 and the program area 22.

The program area 22 is divided into a specific area 22a and an MPEG data area 22b.

The MPEG data area 22b of the program area 22 is formed after the specific area 22a so that MPEG audio data is recorded in sector units, and the specific area 22a is formed after the read-out area 21 to program The information on the area and the lyrics data and the beat data of the song related to the MPEG audio data are recorded.

Here, the read-in area 21 records the type of disc, the number of songs, the time of each song, the total time and the beginning and the index part of each song, and the non-read area 23 records that the program is finished. have.

In the MPEG data area 22b of FIG. 4, as shown in FIG. 5, each track except for the first track 22a has a header in which various coding information is recorded as a predetermined byte, and only MPEG audio data is sectors. It is characterized by being recorded in units.

6 is a block diagram illustrating an embodiment provided to explain a compact disc reproducing apparatus for an image flexible semi-period according to the present invention.

According to the present embodiment, an optical pickup 201 for irradiating a light beam to a disk 200 having a format configuration as shown in FIG. 4 to read data therefrom and outputting the data as a high frequency signal and an optical pickup 201. A high frequency amplification unit 202 for amplifying and outputting a high frequency signal up to a set level, and extracting a focus error signal and a tracking error signal from the amplified high frequency signal, and demodulating and outputting an input 14 bit digital signal to 8 bits In addition, the digital signal processor 203 detects the subcode by referring to the demodulated data string, and receives and combines and outputs an infrared signal input from the remote controller 211 to display various functional states of the image flexible half cycle. Of the optical pickup 201 according to the sub-code detected by the digital display processor 203 and the key data inputted from the receiving / displaying unit 212. The microprocessor 204 generates a control signal for moving and rotating the disk 200, and the optical signal 201 is moved while the optical pickup 201 is rotated while the disk 200 is rotated by the control of the microprocessor 204. An optical servo unit 205 for adjusting focus and tracking through the optical pickup 201 with reference to a focus error signal and a tracking error signal input from the processor 203, and a digital signal processor under the control of the microprocessor 204. An external memory 207 for storing lyrics data and time signature data inputted from 203 and MPEG audio data inputted from the digital signal processor 203 under the control of the microprocessor 204 are buffered in its own buffer. The buffered MPEG audio data is decoded and outputted in synchronization with the lyrics data and beat data stored in an external memory 207 and the lyrics data is output. The MPEG decoder unit 206 for outputting the data through the video output terminal 212, the tone data processing unit 209 for reading and outputting the tone data from the tone rom 208 under the control of the microprocessor 204; The digital / analog converter 210 converts the audio data decoded by the MPEG decoder 206 and the tone data of the tone data processing unit 209 into an analog signal and outputs them through the audio output terminal 213.

FIG. 7 shows that only MPEG audio data is recorded in the MPEG data area 22b of the program area 22, and the lyrics data of a song related to the MPEG audio data is stored in the specific area 22a of the program area 22. A signal flow diagram for reproducing the disc 200 of the present invention in which time signature data is recorded.

A compact disc for image flexible semi-period and a reproduction method of the disc according to the present invention made as described above will be described in detail below.

First, the optical pickup 201 is a laser light emitting device for irradiating a light beam onto the disk 200, and a light receiving element, an objective lens, and an objective lens for detecting the reflected light from the surface of the disk 200, as is well known. A built-in servo mechanism is built-in, and the high frequency signal detected from the light receiving element of the optical pickup 201 becomes bright on the flat surface of the disk 200 and dark on the pit portion, so that the analog signal type exists depending on the presence or absence of the pit. Is output.

That is, the data is determined and output according to whether the disk 200 is present or not.

In such an optical pickup 201, first, when the compact disc player is started, the optical pickup 201 reads the information recorded in the read-in area 20 of the disc 200 as shown in Fig. 7 (step ST10). The microprocessor 204 is provided to the microprocessor 204 through the high frequency amplifier 202 and the digital signal processor 203 which will be described later.

The microprocessor 204 scans the read-in area 20 and determines whether the disc contains MPEG audio, or a general video compact disc and a mini karaoke compact disc (steps ST11, ST21, ST24).

As a result of the determination in step ST11, when the MPEG audio is recorded, the microprocessor 204 controls the optical pickup 201 through the optical servo unit 205.

The optical pickup 201 is recorded by the optical servo unit 205 in the specific area 22a of the disc 200 as shown in FIG. 4, for example, the lyrics data recorded in the first track of the program area 22; The time data is read and provided to the digital signal processor 203 through the high frequency amplifier 202 of FIG.

The digital signal processing unit 203 digitally processes the lyrics data and the beat data inputted from the high frequency amplifying unit 202 and stores them in the external memory 207 through the MPEG decoder unit 206 (step ST12). The tracking error signal and the focus error signal are extracted from the high frequency signal input from the amplifier 202 and provided to the optical servo unit 205 to adjust the tracking error and the focus error.

In this state, when the user designates a song to be selected through the remote controller 211 and the reception / display unit 212, the microprocessor 204 displays the selected song number on the reception / display unit 212 to zoom and In addition, the optical servo unit 205 is controlled to move the optical pickup 201 to a position corresponding to the input song number, that is, track number (step ST13), and the sector in the MPEG data area 22b of the disc 200. The actual MPEG audio data A as shown in FIG. 5 recorded in units is read.

The MPEG audio data read from the optical pickup 201 is provided to the MPEG decoder 206 through the high frequency amplifier 202 and the digital signal processor 203 in the same manner as described above.

The MPEG decoder 206 buffers MPEG audio data input from the digital signal processor 203 into its own buffer under the control of the microprocessor 204 and decodes the buffered audio data (step ST14). .

Here, the MPEG decoder 206 reads lyrics data and beat data related thereto from the external memory 207 in decoding MPEG audio data (step ST15) in synchronization with the actual MPEG audio data. It is provided to the analog converter 210 and the lyrics data is displayed on the screen through the video output terminal 212.

At this time, the microprocessor 204 searches for the amount of MPEG audio data buffered in the buffer of the MPEG decoder 206 (steps ST16 and ST18).

If the MPEG audio data is filled in the audio bit stream buffer as a result of the search in step ST16, the operation of reading the MPEG audio data recorded on the disc 200 through the optical servo unit 205 and the optical pickup 201 is stopped and the current operation is stopped. After the track position is stored, the idle state is maintained (step ST17).

In the idle state, the MPEG decoder 206 uses the MPEG audio data stored in its audio bit stream buffer under the control of the microprocessor 204, as described in the above steps ST14 and ST15. Perform decoding.

Therefore, as time passes, the level of the audio bit stream buffer is gradually lowered to almost exhausted.

When the MPEG audio data is almost exhausted, it releases the operation which was in the pause state again, that is, stops the operation of reading the data from the disk 200, and reads the continuous MPEG audio data from the stored position afterwards (step ST19) The audio bit stream buffer of the MPEG decoder 206 is buffered in the same manner as described above.

Then, as time passes, the level of the audio bit stream buffer gradually increases, and when the buffer amount of the MPEG audio data becomes full again, the reading of the MPEG audio data is stopped and the pause state is maintained.

By repeating this operation until the end of the song (step ST20), the filling or exhausting of the audio bit stream buffer is prevented.

As described above, the MPEG audio data decoded by the MPEG decoder 206 is provided to the digital / analog converter 210, and the tone data processor 209 controls the tone ROM 208 under the control of the microprocessor 204. The tone data is read from the digital data and is provided to the digital / analog converter 210.

Accordingly, the digital / analog converter 210 converts the input MPEG audio data and the tone data into an analog signal and outputs the analog audio signal to the speaker not shown in the drawing through the audio output terminal 213.

On the other hand, if it is determined in steps ST21 and ST24 that the normal video compact disc or mini karaoke disc, the corresponding disc is reproduced in the same manner as before until the song ends (steps ST22 to ST26).

Here, when playing a video compact disc or mini karaoke compact disc, there is no difficulty in managing the bit stream buffer of the MPEG decoder unit 206, and in the case of a disc recorded only with MPEG audio data, much attention has been paid to the buffer management as described above. You should pay attention.

On the other hand, as a comparative example, unlike the prior art, that is, mixing audio data and video data into a program area of a disc at a ratio of about 6: 1, the present invention provides the program area of the disc with the MPEG data area. It can be seen that the MPEG audio data is recorded in the MPEG data area and the lyrics data and the beat data related to the MPEG audio data are recorded and recorded in the specific area.

As a result, according to the present invention, more songs can be recorded by recording only MPEG audio data excluding video data in the program area of the disc, and by recording lyrics data and time data of songs related to the MPEG audio data, There is an advantage to realize a more lively sound field and sound quality during playback

In addition, although specific embodiments of the present invention have been described and illustrated above, it is obvious that the present invention may be variously modified and implemented by those skilled in the art.

Such modified embodiments should not be individually understood from the technical spirit or the prospect of the present invention, and such modified embodiments should fall within the appended claims of the present invention.

It is clear from the above description that according to the present invention, according to the present invention, a compact disc for a semi-periodic flexible recording records and produces MPEG audio data excluding video data and related lyrics and beat data in a program area of the disc, thereby recording more songs. And it is easy to produce a disc, and by recording and producing the lyrics data and time data of the song related to the MPEG audio data, there is an effect that can realize a more realistic sound field and sound quality during playback.

Claims (6)

For compact discs with in-read / out-read areas and program areas around the origin: The compact disc, (1) dividing the program area into a specific area and a data area, and recording MPEG audio data in the data area in sector units; (2) A compact disc for image flexible half-cycle, characterized in that it has a format configured by recording information about the data area, lyrics data of a song related to the MPEG audio data, and time signature data in the specific area. The method of claim 1, And a single track in the program area is designated as the specific area. The method of claim 2, And a first track of the program area adjacent to the read-in area as the specific area. The program area of the compact disc is divided into a specific area and a data area so that MPEG audio data is recorded in the data area, and lyrics and beat data related to the MPEG audio are recorded in the specific area. In the playback method: (1) reading and storing lyrics data and beat data of a song recorded in the specific area by moving a pickup during playback of the disc; (2) selecting and buffering and decoding MPEG audio data from the data area by moving the pickup to a position corresponding to the selected track number; (3) monitoring the buffer amount of the MPEG audio data while outputting the decoded MPEG audio data as an analog signal in synchronism with the related lyrics data and time signature data while playing the corresponding track of the data area; And And (4) determining whether to continuously read the MPEG audio data according to the monitored buffer amount. The method of claim 4, wherein The step of determining whether or not to read, if the buffer amount of the MPEG audio data is full, stopping the reading of the audio data from the disk and storing the current track position while maintaining a rest state; Decoding and outputting the buffered MPEG audio data in the idle state; Reproducing the idle state and reading and playing MPEG audio data from the next track of the current position when the buffer amount of the MPEG audio data is lowered as a result of the decoding. Way. The method of claim 4, wherein And reproducing the normal disc mode in the case of the normal disc by determining the disc type of the read-in area.