JP2003308657A - Disk player and disk playing-back method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method by which the data already reproduced are not reproduced again. <P>SOLUTION: Data of an introduction part in audio data of a music instructed to be played back are stored in a memory 20b by a memory controller 21, and the data of the introduction part is compared with the data of the introduction part stored in the memory 20b. When the data of the introduction part stored in the memory 20b coincide with the data of the introduction part in the audio data of the music to be played back, the audio data to be played back and the data of the introduction part are erased from the memory 20b, and if coincidence is not obtained, the audio data of the music to be played back are read out from the memory 20a. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc reproducing apparatus and a disc reproducing method.

[0002]

2. Description of the Related Art In a disc reproducing apparatus, when random reproduction is performed, as a result of the generated random number, the same song is continuously reproduced, or the same song is reproduced again after several songs are reproduced. In some cases, random playback was not performed.

In order to solve such a problem, the protection range of random reproduction is variably set according to the total number of TOC songs.
There is a disk reproducing device which prevents reproduction of the same music number within the protection range (see Japanese Patent Publication No. 5-61697).

In this disc reproducing apparatus, at least the total number of songs on the disc is read from the TOC information, and the protection range for random reproduction is variably set to a value smaller than the total number of songs on the reproducing disc in accordance with the total number of songs read. To do. With this, in the random reproduction, the same music is prevented from being reproduced within the protection range predetermined according to the number of music, and the random reproduction can be performed, and the protection range is set to the total number of music. Depending on whether it is variable or not, even if the number of songs is small, random playback can be performed continuously.

[0005]

In such a conventional disc reproducing apparatus, the random reproducing function is effective when the random reproduction is performed on one CD without replacing the disc. However, when there are a plurality of CDs, it is necessary to read the total number of songs on each disc. in this case,
The same song may be recorded on multiple CDs. For example, in particular, a music CD may contain the same song in the album of the same singer or the best album, as well as in an album in which many singers are grouped. Viewers
Usually, I often listen to multiple CDs in succession.

When the disc is replaced in this way,
Since the total number of songs on the disc is read, substantially no random playback is performed, and the same song that has already been played is played. For this reason, the operator has to operate the buttons one by one to skip the next song, which is troublesome.

The present invention has been made in view of the above conventional problems, and provides a disc reproducing apparatus and a disc reproducing method configured so that the same already reproduced data will not be reproduced. The purpose is to

[0008]

In order to achieve this object, a disk reproducing apparatus according to a first aspect of the present invention is a disk reproducing apparatus for reproducing frame data recorded on a disk in frame units. Frame data storage means for sequentially reading the frame data to be reproduced, storing the read frame data, and data identification information of the stored frame data,
A determination unit that determines whether or not the data identification information that has already been extracted and stored and the newly extracted data identification information match, and the data identification information that has been determined to not match, and the data that has been determined to match. Identification information storage means for erasing one of the identification information, identification data storage means for erasing the extraction source frame data of the erased data identification information from the frame data storage means, and the frame Data reproducing means for reproducing the frame data stored in the data storage means.

The determination means may extract a part of the frame data to be reproduced as the data identification information.

There may be provided a reading speed control means for controlling a speed at which the frame data to be reproduced is read from the disc based on the data amount of the frame data stored in the frame data storage means. The frame data storage means may be a sound skip prevention memory.

In the disc reproducing method according to the second aspect of the present invention, among the frame data recorded on the disc in frame units, the frame data to be reproduced is read from the disc, and the read frame data is stored in the frame data storage means. Storing the extracted data identification information in the identification information storage means, extracting the data identification information of the frame data from the frame data stored in the frame data storage means, and storing the extracted data identification information in the identification information storage means. The step of determining whether or not the stored data identification information and the newly extracted data identification information match, and deleting one of the data identification information determined to match Then
The step of storing only the other data identification information in the identification information storage means, the step of erasing the extraction source frame data of the erased data identification information from the frame data storage means, and the step of storing in the frame data storage means And reproducing the frame data.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A disk reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. In the present embodiment, the disc reproducing apparatus is a CD (Compact Disk).
sk) will be described as an optical disk device capable of reproducing an optical disk.

FIG. 1 shows the configuration of the optical disk device according to the present embodiment. The optical disc device according to the present embodiment is
A disc loading detector 11, a disc motor 12,
The servo circuit 13, the optical pickup 14, the pickup feed motor 15, the demodulation circuit 16, the subcode signal processing circuit 17, and the audio data signal processing circuit 18
A control unit 19, a memory 20, a memory controller 21, a TOC (Table of Contents) memory 22,
The operation unit 23, a D / A converter 24, an LPF (low-pass filter) 25, an amplifier 26, and a speaker 27 are provided.

The disc loading detector 11 detects that the optical disc 1 is set on a turntable (not shown).

The disk motor 12 is a motor for rotating the optical disk 1 set on the turntable.

The servo circuit 13 is supplied with a drive control signal for performing servo from the control unit 19, and the optical disk 1
Is a circuit for driving and controlling the disk motor 12 so that the linear velocity of each track becomes constant. Further, the servo circuit 13 performs focus servo and tracking servo. The focus servo is a control for driving an objective lens (not shown) of the optical pickup 14, and the tracking servo is a control for controlling the pickup feed motor 15 to cause the optical pickup 14 to follow the track. The control unit 19 outputs a drive control signal for performing servo to the servo circuit 13.

The optical pickup 14 irradiates the optical disc 1 with a light beam, and based on the reflected light, the optical disc 1
The optical detection signals of the TOC data recorded in the lead-in area and the music data recorded in the program area are generated.

The pickup feed motor 15 is a motor for moving the optical pickup 14 in the radial direction of the optical disc 1.

The demodulation circuit 16 is for demodulating and generating digital data, and generates a PCM-modulated digital signal based on the photodetection signal output from the optical pickup 14. Then, the demodulation circuit 16 detects the sync signal from the generated digital signal, identifies the delimiter of each data, and EFM (Eight to FourteenMod) in each frame.
modulation) The demodulated signal is demodulated and the demodulated signal is
Convert to bit digital data.

The subcode signal processing circuit 17 is a circuit for restoring a subcode. That is, the subcode signal processing circuit 17 acquires the digital data from the demodulation circuit 16 and outputs it to a CIRC (Cross Interleave Read-solomon Co).
error correction processing by de) and de-interleaving processing to restore temporal continuity to restore the subcode.
This subcode is one block at a period of 1/75 second and is composed of 8 channels P to W. Position information indicating the position of the beginning of the song is included in the P channel, and position information indicating the absolute elapsed time from the start point of the signal track, the elapsed time for each song, and the song number is included in the Q channel. There is. As a result, it is possible to detect the position of the desired music and perform a search or the like.

The audio data signal processing circuit 18 generates each sample of digital audio data. That is, the audio data signal processing circuit 18, similar to the subcode signal processing circuit 17, acquires digital data from the demodulation circuit 16 and performs error correction processing and de-interleave processing by CIRC to obtain each sample of digital audio data. To generate.

The control unit 19 includes a CPU (Central Processi).
ng Unit), a ROM (Read Only Memory) not shown,
It is equipped with a RAM (Random Access Memory) and controls the entire optical disk device.

Further, since the control section 19 reads the audio data of the music piece for which reproduction is instructed from the optical disk 1,
Obtain the subcode from the subcode signal processing circuit 17,
The position of the designated music piece is detected based on the absolute elapsed time included in the Q channel of the acquired subcode.

The memory 20 includes a memory 20a and a memory 20.
and b. The memory 20a is a memory for storing audio data, and the memory 20b is a memory for storing intro data of audio data as data identification information. As the memory 20, a memory or the like used for preventing sound skipping can be used.

The data of the intro section is a predetermined number of frame data corresponding to the intro section of the audio data, and the control section 19 is included in the Q channel of the subcode acquired from the subcode signal processing circuit 17. Based on the absolute elapsed time or the like, the data in the intro section is read from the optical disc 1 continuously or at predetermined intervals.

The memory controller 21 stores the digital audio data generated by the audio data signal processing circuit 18 in the memory 20a, the intro data of the audio data in the memory 20b, and the audio data from the memory 20a. Read and control.

Further, the memory controller 21 uses the memory 2 when reading audio data from the optical disk 1.
The amount of data stored in 0 is monitored, and a memory full signal indicating the monitoring result is output to the control unit 19.

The memory controller 21 turns off the memory full signal when the amount of data stored in the memory 20 is less than or equal to a preset amount, and turns on the memory full signal when the amount of data exceeds the preset amount. To do.

When the memory full signal is on, the control unit 19 rotates the disk motor 12 at the same speed (constant speed) as the reading speed of the data from the memory 20, and when the memory full signal is off. , Disk motor 12
Are rotated at a speed (high speed) twice as fast as the speed of reading data from the memory 20.

The TOC memory 22 is a memory for storing the TOC data recorded in the lead-in area of the optical disc 1. In this TOC data, as information corresponding to the table of contents of all songs, a disc number, song number data of each song, elapsed time from the start time of the program area to the beginning of each song, minutes, seconds, frame number, etc. The absolute time data of is recorded. By recording such information in the TOC memory 22, it is possible to find the beginning of a song.
The control unit 19 reads the TOC data recorded in the lead-in area via the demodulation circuit 16 and the subcode signal processing circuit 17 when the disc is set, and stores the read TOC data in the TOC memory 22.

The operation section 23 has a display and operation buttons. The operation buttons include buttons for performing operations such as normal reproduction, random reproduction, program reproduction, and stop. This normal playback is a method of sequentially playing songs from the beginning, the random playback is a method of randomly playing songs, and the program playback is for registering the selected song number in advance and the registered song selections. It's a way to play songs based on their turn.

The operation unit 23 also has a same music skip button for selecting the same music skip function.
This same song skip function is a function to skip to the next song even if the already played song is instructed to be played.
The control unit 19 turns on the same music skip function when the same music skip button is pressed, and turns off the same music skip function when the same music skip button is pressed again.

The D / A converter 24 is for converting the digital audio data read from the memory 20a by the memory controller 21 into analog data, and after converting it into analog data, separates it into left and right channel signals. The LPF 25 removes noise from the analog data converted by the D / A converter 24.

The amplifier 26 amplifies the signal output from the LPF 25. The speaker 27 is the amplifier 2
The signal output from 6 is output as voice.

Next, the operation of the optical disk device according to the embodiment will be described. In FIG. 1, when the optical disc 1 is set on the turntable, the disc loading detector 11 detects the setting of the optical disc 1.

When there is a reproduction instruction, the control section 19 controls the rotation of the disk motor 12 via the servo circuit 13. The disc motor 12 rotationally drives the optical disc 1, and the servo circuit 13 drives and controls the disc motor 12 so that the linear velocity of each track of the optical disc 1 becomes constant, thereby performing focus servo and tracking servo.

The pickup feed motor 15 moves the optical pickup 14 in the radial direction of the optical disc 1 to the lead-in area, the optical pickup 14 irradiates the optical disc 1 with a light beam, and based on the data recorded on the optical disc 1. Output a digital signal.

The demodulation circuit 16 generates a PCM-modulated digital signal based on the optical detection signal output from the optical pickup 14, detects a synchronization signal from the digital signal, identifies a delimiter of each data, and identifies each frame. EFM in
The modulated signal is demodulated and converted into 8-bit digital data.

The subcode signal processing circuit 17 receives the CIR based on the digital data output from the demodulation circuit 16.
The error correction process and de-interleave process by C are performed to restore the subcode.

The control unit 19 acquires the restored subcode from the subcode signal processing circuit 17, reads the TOC data recorded in the lead-in area of the optical disc 1, and stores the read TOC data in the TOC memory 22. Remember. The control unit 19 acquires the TOC data stored in the TOC memory 22 and detects the position where the designated music data is recorded.

When the position where the designated music data is recorded is detected, the pickup feed motor 15 moves the optical pickup 14 to the position where the designated music data is recorded, and the optical pickup 14 is designated. The music data recorded at the designated position is read.

The audio data signal processing circuit 18, based on the digital data output from the demodulation circuit 16,
Similar to the subcode signal processing circuit 17, error correction processing and de-interleave processing are performed to generate each sample of digital audio data.

The memory controller 21 stores the audio data generated by the audio data signal processing circuit 18 in the memory 20a. When reproducing a song, the memory controller 21 reads audio data from the memory 20a and outputs it to the D / A converter 24.

The D / A converter 24 converts the audio data read by the memory controller 21 from the memory 20a into analog data, and then separates the audio data into stereo left and right channels. The LPF 25 removes noise of the analog data output from the D / A converter 24.

The amplifier 26 amplifies the signal output from the LPF 25, and the speaker 27 outputs the signal output from the amplifier 26 as sound.

When the same music skip button of the operation unit 23 is pressed, this operation command is supplied from the operation unit 23 to the control unit 19, and the control unit 19 turns on the same music skip function.

Next, the operation of the optical disk device when the same music skip function is turned on will be described with reference to the flowchart shown in FIG. When the loading of the first optical disc 1 is detected by the disc loading detection unit 11 (step S11), the control unit 19 determines whether or not there is a playback instruction of the designated song (step S12).

When it is determined that there is no instruction to reproduce the designated music (No in step S12), the control unit 19
Wait until there is an instruction to play the specified song. When it is determined that there is an instruction to reproduce the designated song (step S1)
2, Yes), the control unit 19 reads the audio data of the music piece for which reproduction is instructed from the optical disc 1 based on the absolute elapsed time or the like included in the P channel of the subcode acquired from the subcode signal processing circuit 17. The read audio data is stored in the memory 20a (step S13).

At this time, the control unit 19 controls the disc motor 12 via the servo circuit 13 to rotate the optical disc 1 at a high speed.

The memory controller 21 executes the same music skip processing so as to skip and move to the next music even if the reproduction of the already reproduced music is instructed (step S1).
4).

This same music skip processing will be described with reference to the flowchart shown in FIG. The control unit 19 reads data in the intro section continuously or at predetermined intervals based on the absolute elapsed time included in the Q channel of the subcode acquired from the subcode signal processing circuit 17, and the memory controller 21 , The read intro data is stored in the memory 20b (step S2).
1).

The memory controller 21 is used for the optical disc 1
It is determined whether is the first sheet (step S22). When it is determined that the optical disc 1 is the first disc (Yes in step S22), the data of the intro section to be compared is the memory 2
Since it is not stored in 0b, the memory controller 2
1 ends this process without comparing the data in the intro section and determining whether the data match or does not match. Therefore, for audio data for which reproduction of the first optical disc 1 is instructed, all data in the intro portion is stored in the memory 20.
stored in b.

Next, when the optical disk 1 is exchanged, the memory controller 21 determines that it is the second optical disk 1 or later (No in step S22). In this case, since the data of the intro section has already been stored in the memory 20b, the memory controller 21 causes the intro section data of the audio data for which reproduction is instructed and the intro section already stored in the memory 20b. Is compared with the data (step S23).

The memory controller 21 determines whether or not the data in the intro section of the audio data for which reproduction has been instructed and the data in the intro section already stored in the memory 20b match (step S24).

If it is determined that the data of the intro part of the audio data for which reproduction has been instructed and the data of the intro part already stored in the memory 20b match (Yes in step S24), the song has already been recorded. Since it has been reproduced, the memory controller 21 erases the audio data stored in the memory 20a and the data of the intro section stored in the memory 20b without reproducing the song (step S25).

When it is determined that the intro data of the audio data for which the reproduction instruction has been issued does not match the intro data already stored in the memory 20b (No in step S24), the reproduction instruction Since the existing song is not the played song, the memory controller 21 ends this process while storing the audio data and the data of the intro section in the memories 20a and 20b, respectively.

When the same song skip processing is performed, returning to FIG. 2, the control unit 19 determines whether or not to start the reproduction (step S15).

When the audio data is stored in the memory 20a, the control section 19 determines to start the reproduction.
When it is determined that the reproduction is started, the control unit 19 executes the reproduction process (step S16). This reproduction process will be described later. The memory controller 21 executes the same music skip processing even during the execution of the reproduction processing.

The control section 19 determines whether or not the read audio data is for the final song (step S1).
7). When it is determined that the song is not the final song (step S17)
No.), the control unit 19 controls the steps S12 to S1.
The process of 6 is repeated.

When it is determined that it is the last song (Yes in step S17), the operation unit 23 displays on the display that the optical disc 1 can be replaced (step S1).
8). Here, the control unit 19 can also eject the optical disc 1. It should be noted that, even during reproduction, the memory 20a
If the audio data to be played is stored in,
The optical disc 1 can be replaced.

Next, the control unit 19 determines whether or not the same music skip function has ended (step S19). When it is determined that the same song skip function has not ended (step S
No in 19), the control unit 19 controls the steps S11 to S1.
The process of 8 is repeated.

When the same music skip button of the operation unit 23 is pressed again, the control unit 19 determines that the same music skip function is off (Yes in step S19). in this case,
The control unit 19 erases the data and the like in the intro portion of the already reproduced music stored in the memory 20b, and ends this processing.

When the reading of the audio data from the optical disc 1 is started, the audio data and the data of the intro section are stored in the memories 20a and 20b, respectively, so that the amount of the data stored in the memory 20 increases. .

When the reproduction is started, the audio data is read from the memory 20a and the audio data read from the memory 20a is erased, so that the amount of data stored in the memory 20 is reduced. When the reading of audio data from the optical disc 1 is started, the memory controller 21 monitors the amount of data stored in the memory 20.

This operation will be described with reference to the flowchart of FIG. When the control unit 19 starts reading audio data (step S31), the memory controller 21 determines whether the amount of data stored in the memory 20 has reached a predetermined amount (step S32).

When it is determined that the amount of audio data and the amount of data in the intro section stored in the memories 20a and 20b have increased and the data amount has reached the predetermined amount (Yes in step S32), the memory controller 21
Outputs a memory full signal to the control unit 19 (step S33).

When the audio data stored in the memory 20a is reproduced and the audio data is erased from the memory 20a and it is determined that the data amount is less than the predetermined amount (No in step S32), the memory controller 21 Stops the output of the memory full signal.

The control section 19 controls the rotation of the disk motor 12 according to the presence / absence of the memory full signal, and performs the reproducing process.

Next, the reproducing process executed in step S16 will be described with reference to the flowchart of FIG. The control unit 19 reads the audio data and starts reproduction (step S41).

The memory controller 21 reads the audio data from the memory 20a and starts reproduction (step S41). At this time, the control unit 19 provides a predetermined inter-song time (silence) between songs. When the song ends like this, there is a space between songs, so that the listener can listen to the next song without being aware of the skip function.

The control unit 19 controls the exchange of the optical disk 1,
In order to recognize that it is the first piece of the first piece of music, it is possible to reproduce it when the optical disk 1 is replaced or when the first piece of the first piece of music is opened with a predetermined time interval.

The control unit 19 determines whether or not there is a memory full signal (step S42). When it is determined that the memory full signal is present (Yes in step S42), the control unit 19
Controls the rotation speed of the disk motor 12 via the servo circuit 13 so that the audio data reading speed and the audio data reading speed become equal (step S43).

When it is determined that the memory full signal does not exist (No in step S42), the control unit 19 causes the disc motor 1 to operate via the servo circuit 13 so that the audio data reading speed becomes faster than the reading speed.
The rotation speed of 2 is controlled (step S44).

The control section 19 determines whether or not there is a next piece of music (step S45). When it is determined that there is the next song (Yes in step S45), the control unit 19 continues the reproduction process for the next song (steps S41 to S4).
4).

When it is determined that there is no next song (step S
No in 45), the control unit 19 ends the reproduction process.

As described above, the control unit 19 and the memory controller 21 execute the same music skip processing even during the execution of the reproduction processing. And memory 2
If the amount of data stored in 0 is less than a predetermined value set in advance, the audio data reading speed becomes faster, and when the predetermined value is reached, the audio data reading speed becomes equal to the audio data reading speed. The control unit 19 controls the rotation of the disk motor 12 during the reproduction process, so that the same music skip process and the reproduction process can be efficiently performed.

Also, even if the optical disc 1 is replaced, the control unit 19 stores all the inserted optical discs 1 and the data of the intro portion of the music data as long as the capacity of the memory 20 is not insufficient. Enable the song skip function.

In addition to the normal sequential reproduction and random reproduction, in the program reproduction, when the operator mistakenly inputs a program of a reproduced music, a message to that effect is displayed.
The operator can re-enter the correct song, and even if he / she does not notice the display, the song is not played.

In this way, during reproduction, the control unit 19
By reproducing while comparing the data of the intro part of the reproduction instruction music with the data of the intro part stored in the memory 20b, the same music as the music once reproduced is not reproduced in the loaded optical disc 1. In addition, the song can be played.

Further, unlike the optical disk device equipped with the changer device, the number of optical disks 1 is limited by the capacity of the memory 20 for storing the data of the intro part of the music, but for example, the data of the intro part corresponds to one music. To 100
In the case of a frame, the time is 0.0136 seconds, and there is little fear that the capacity of the memory 20 will be reduced due to the storage of data in the intro section.

However, assuming that the amount of data in the intro section reaches a preset amount, the fact can be displayed on the display of the operation section 23. Also, after that, the same song skip function can be stopped.
The operator can press the same song skip button to stop the same song skip function.

As described above, according to the present embodiment, the memory controller 21 stores the data of the intro portion of the reproduced music in the memory 20b and compares it with the data of the intro portion of the music to be reproduced next. By doing so, it is determined whether or not the music instructed to reproduce is the same as the music already reproduced.

Therefore, the optical disk device according to this embodiment has the following effects. First, it is possible to support a plurality of optical discs 1 by exchanging the optical discs 1,
The same song is never played.

In addition to random reproduction which is randomly reproduced, normal reproduction which is sequentially reproduced from the beginning and program reproduction which is reproduced in a preset order can be supported. In particular, in the program reproduction, when the operator mistakenly inputs a program of a music piece that has already been reproduced, a message to that effect can be displayed and input again. Also, even if the user does not notice the display and reproduces, the reproduction is not performed.

Since the intro data of the next music is compared during the reproduction of the previous music, the music can be reproduced without affecting the time between music.

When the reading of the final song of the optical disc 1 is completed, it is displayed that the optical disc 1 can be exchanged, so that even if the optical disc 1 is exchanged, the song can be reproduced without a long time between songs. It can be carried out. Especially sequential playback,
Effective for random playback.

At the time of exchanging the optical disc 1 or for the first song of the first disc, the reproduction is performed with a predetermined time interval, so that it is possible to recognize the exchange of the optical disc 1 and the first song.

Even if an instruction is given to reproduce the same music as the music already reproduced, the operator does not need to skip the music one by one. Since only the same song is skipped, the same song can be played back without any problems if the singer's cover version is different or only the performance is performed.

Further, since it is displayed on the display that the optical disc 1 can be exchanged when the reading of the final song is completed, even if the optical disc 1 is exchanged, reproduction can be performed without a long time between songs. This is particularly effective for sequential reproduction and random reproduction.

Various modes are conceivable for carrying out the present invention, and the present invention is not limited to the above-described modes. For example, the optical disc 1 is not limited to a CD, but may be an MD (MD: Mini Disk), a DVD (Digital V).
ersatile disk), MO (Magneto Optical disk), or a flexible disk. Further, the frame data is not limited to the music data but may be video data.

Further, the data identification information is not limited to the data in the introduction part, but may be data in a specific portion of the music, or if a specific code number is given to the optical disc 1 in advance, The code number and the music number can also be used as the data identification information.

[0092]

As described above, according to the present invention,
It is possible to prevent the same data that has already been reproduced from being reproduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an optical disc device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a process when the same song skip function of the optical disc device of FIG. 1 is turned on.

FIG. 3 is a flowchart showing the same song skip processing of the optical disk device of FIG.

4 is a flowchart showing a data amount monitoring process of the optical disk device of FIG.

5 is a flowchart showing a reproduction process of the optical disc device of FIG.

[Explanation of symbols]

1 optical disc 14 Optical pickup 19 Control unit 20 memory 21 Memory controller

Claims (5)

[Claims] 1. A disc reproducing apparatus for reproducing frame data recorded on a disc in frame units, frame data storing means for sequentially reading frame data to be reproduced from the disc, and storing the read frame data, said storage. Determination means for determining whether or not the data identification information of the frame data extracted and the data identification information already extracted and stored and the newly extracted data identification information match, and the data identification information determined to not match And an identification information storage unit that erases any one of the data identification information that is determined to match and the extraction source frame data of the erased data identification information is the frame data storage unit. Frame data erasing means for erasing from a frame, and the frame data storing means A data reproducing means for reproducing the stored frame data, including a disk reproducing apparatus, characterized in that. 2. The disc reproducing apparatus according to claim 1, wherein the judging means extracts a part of the frame data to be reproduced as the data identification information. 3. A read speed control means for controlling a speed of reading frame data to be reproduced from the disc based on a data amount of the frame data stored in the frame data storage means. The disc reproducing apparatus according to claim 1 or 2. 4. The disc reproducing apparatus according to claim 1, wherein the frame data storage means is a sound skip prevention memory. 5. A step of reading the frame data to be reproduced from the disk out of the frame data recorded on the disk in frame units and storing the read frame data in the frame data storage means; A step of extracting the data identification information of the frame data from the stored frame data; a step of storing the extracted data identification information in the identification information storage means; and a step of newly adding the data identification information already extracted and stored. A step of determining whether or not the extracted data identification information matches, of the data identification information determined to match, one of the data identification information is erased, and only the other data identification information is identified. A step of storing in the information storage means, and an extraction source of the deleted data identification information Steps and, a step of reproducing the frame data stored in the frame data storing means, comprising a disc reproducing method characterized by erasing the frame data from the frame data storing means.