JP2004005963A - Device for reproducing recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve operability in the case of repeatingly reproducing a prescribed part of information data recorded in a recording medium. <P>SOLUTION: When a music division start key 19 is operated while optional information data recorded in a disk 1 is reproduced, a microcomputer 9 for system control makes a position in the information data while being reproduced when the operation is performed to be a division point and rewrites the U-TOC information of the disk 1 such that the division point becomes an end position for a former part of the information data and a start position for its latter part. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a recording and reproducing apparatus for recording and reproducing information data such as audio data.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a device for reproducing a disk as a recording medium on which information data such as audio is recorded, a CD device for reproducing a so-called compact disk (hereinafter, referred to as a CD) is known. In such a CD device, when a predetermined song selected from a large number of songs recorded on a CD is to be reproduced, the song number or the like of the song is designated by an input key. The song can be played.
[0003]
As another device of this type, there is known an MD device which uses a so-called mini-disc (hereinafter, referred to as an MD) which is a magneto-optical disk as a recording medium, and which can record on and reproduce the MD. I have. This MD device compresses information data such as audio data in the time axis, digitally records the data in the MD, reads out the information data recorded in the MD, expands the time axis, and performs reproduction. In such an MD device, end point information indicating the end point of a song recorded on the MD can be recorded at the end point of the song recorded on the MD. Therefore, a predetermined song selected from a large number of songs recorded on the MD can be recorded. When the reproduction is to be performed, the above-mentioned end point information is detected based on the operation of the input key, so that the predetermined music can be automatically reproduced.
[0004]
[Problems to be solved by the invention]
However, in the above-described CD device, when a predetermined portion of a selected music piece is repeatedly reproduced, an operation of searching for that portion by fast-forwarding or rewinding is required, and this operation is very troublesome. . Also, in a CD device having a function of storing a specified portion of a predetermined music in a memory, the portion can be automatically reproduced by operating an input key, but the power is turned off or the like. When the CD is removed from the apparatus, the contents stored in the memory are erased, so that it is necessary to store the CD again. Such a problem also applies to the MD device.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention uses information data defined by a start point position and an end point position as one unit, and records L pieces of information data in an information data recording area. In a recording / reproducing apparatus that reproduces desired information data from an information data recording area based on data read from the table of contents while using a recording medium on which data indicating the end point position is recorded in the table of contents area, A division start key for designating one division point during the reproduction of the information data; storage means for storing position information representing the division point designated by operating the division start key; and a division point for adjusting the designated division point An adjustment key; and a division determination key for determining a division position corresponding to the division point. Further, during the reproduction of the N (positive integer) -th information data of the L pieces of information data, When the division point adjustment key is operated after operating the division start key to specify the division point, the division point is moved according to the operation of the division point adjustment key, and the position information of the moved division point is described above. While replacing the position information with the position information stored in the storage means, when the division determination key is operated, the division position based on the position information stored in the storage means is changed to the end point position of the front part and the start point position of the rear part of the information data. Control means for recording the data to be described in the table of contents area of the recording medium.
[0006]
Therefore, according to the present invention, when a division point is specified during reproduction of information data, the control means stores the position in the information data being reproduced when the division point is specified in the storage means as the division position, When the division point adjustment key is operated in this state, the division position is moved on the storage means, and when the division determination key is operated, the division position stored in the storage means is changed to the end point position of the front part and the rear part of the information data. Is recorded in the table of contents area of the recording medium, the position of the division point can be adjusted easily and quickly. Further, even when the power of the apparatus main body is turned off or the recording medium is removed from the apparatus main body, the information data of the front part or the rear part is individually determined based on the data recorded in the table of contents area of the recording medium. Can be played.
[0007]
According to another aspect of the present invention, in order to solve the above-described problem, in addition to the above-described configuration, the control unit may be configured to set the temporary designation position of the division point in the N-th information data by operating the division start key. At this time, the information data is controlled so that a predetermined portion near the temporary designated position is reproduced.
[0008]
Therefore, according to the present invention, since the division point can be confirmed after the division point is specified and before the division position is determined, it can be used as a reference for fine adjustment of the division point for accurately determining the division position.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS.
[0010]
An MD device as a disk recording / reproducing device according to the present embodiment is configured as shown in FIG. This MD device includes a disk 1 as a recording medium, an optical pickup 2, and an RF amplifier 3. The disk 1 is a rewritable magneto-optical disk, and audio data as information data is recorded in an audio data recording area as an information data recording area. The optical pickup 2 reads data recorded on the disk 1 by irradiating the disk 1 with a laser beam, and records data together with the magnetic head 16 on the disk 1. The RF amplifier 3 amplifies audio data read by the optical pickup 2 and generates servo control signals such as a focus error signal and a tracking error signal from the audio data.
[0011]
Further, the MD device includes an encoder / decoder / signal processing circuit 4, a memory controller 5, a shock-proof memory 6, an audio decompression / compression circuit 7, and a D / A / A / D converter 8.
[0012]
The encoder / decoder / signal processing circuit 4 demodulates the audio data input from the RF amplifier 3 at the time of reproduction and performs signal processing such as error correction. Signal processing such as addition of an error correction code is performed on the data. At the time of reproduction, the memory controller 5 writes the audio data input from the encoder / decoder / signal processing circuit 4 into the shock proof memory 6, reads out the audio data stored in the shock proof memory 6, and decompresses / compresses the audio. The signal is output to the circuit 7. At the time of recording, the memory controller 5 writes the audio data input from the audio decompression / compression circuit 7 into the shock proof memory 6, reads out the audio data stored in the shock proof memory 6, and outputs an encoder / decoder / signal. Output to the processing circuit 4. The shock proof memory 6 temporarily stores the audio data processed by the encoder / decoder / signal processing circuit 4 during reproduction, and temporarily stores the audio data processed by the compression circuit of the audio expansion / compression circuit 7 during recording. It is something to memorize. The audio decompression / compression circuit 7 expands the compressed audio data read from the shock proof memory 6 on the time axis by the audio decompression circuit, while the D / A / A / D converter The digital signal input from the A / D converter No. 8 is compressed to about 1/5 by MD information compression technology called ATRAC (Adaptive Transform Acoustic Coding). The D / A / A / D converter 8 converts the audio data input from the audio decompression circuit of the audio decompression / compression circuit 7 into an analog signal by a D / A converter, generates an audio signal, and outputs an audio signal. On the other hand, the A / D converter converts the analog audio signal input from the audio input terminal 18 into a digital signal and supplies the digital signal to the audio compression circuit of the audio expansion / compression circuit 7.
[0013]
Further, the MD device includes a system control microcomputer (hereinafter, referred to as a system control microcomputer) 9 as a control means, a servo circuit 10, a driver circuit 11, a spindle motor 12, a feed motor 13, a power ON / OFF An OFF circuit 14, a head drive circuit 15, a magnetic head 16, a music division start key 19, a music division end key 20, a division point adjustment key 21, and a notification sound generator 22 are provided.
[0014]
Based on the input from the music division start key 19, the music division input key 20, the division point adjustment key 21, and the like, the system control microcomputer 9 performs the encoder / decoder / signal processing circuit 4, the servo circuit 10 , The operation of the memory controller 5, the power ON / OFF circuit 14, and the notification sound generator 22.
[0015]
The servo circuit 10 controls the driver circuit so that focus servo, tracking servo, seek servo, and spin servo are performed based on the servo control signal input from the RF amplifier 3 and the control signal input from the system control microcomputer 9. 11 is controlled. The driver circuit 11 drives the spindle motor 12 and the feed motor 13 based on a control signal from the servo circuit 10. The spindle motor 12 rotates the disk 1, and the feed motor 13 moves the optical pickup 2 and the magnetic head 16 provided to move integrally with the optical pickup 2, for example, in the radial direction of the disk 1. The head drive circuit 15 drives the magnetic head 16, and the magnetic head 16 records signals on the disk 1 together with the optical pickup 2.
[0016]
The music division start key 19 is for instructing the system control microcomputer 9 to start the music division operation during the reproduction operation. The division point adjusting key 21 is composed of a division point advance key and a division point retreat key, and is used to instruct the system control microcomputer 9 to move the division point by these operations and adjust the position of the division point. The music division input key 20 is for instructing the system control microcomputer 9 to record the division point set by the music division start key 19 or the division point adjustment key 21.
[0017]
In the present embodiment, the optical pickup 2, the feed motor 13, the driver circuit 11, and the servo circuit 10 constitute a reproducing unit, and the optical pickup 2, the feed motor 13, the driver circuit 11, the servo circuit 10, and the head drive The circuit 15 and the magnetic head 16 constitute recording means.
[0018]
In the above configuration, during playback of the present apparatus, the disk 1 is rotated by the spindle motor 12, and the optical pickup 2 is sent in the radial direction of the disk 1 by the feed motor 13 and recorded on the disk 1 by the optical pickup 2. Is read out. This audio data is amplified by the RF amplifier 3 and output to the encoder / decoder / signal processing circuit 4.
[0019]
In the RF amplifier 3, a servo control signal such as a focus error signal and a tracking error signal is generated from the audio data, and the servo circuit 10 receives the servo control signal input from the RF amplifier 3 and the servo control signal input from the system control microcomputer 9. The driver circuit 11 is controlled so that focus servo, tracking servo, servo of the spindle motor 12 and the like are performed based on the control signal thus obtained. As a result, the optical pickup 2, the feed motor 13 and the spindle motor 12 are driven by the driver circuit 11.
[0020]
On the other hand, the audio data output from the RF amplifier 3 is demodulated by an encoder / decoder / signal processing circuit 4, subjected to signal processing such as error correction, and is once written in a shockproof memory 6 by a memory controller 5. Thereafter, the above-mentioned audio data is read from the shock proof memory 6 by the memory controller 5 and time-expanded by the audio expansion circuit of the audio expansion / compression circuit 7. This audio data is converted into an analog signal by the D / A converter of the D / A / A / D converter 8 and output from the output terminal 17 as an audio signal.
[0021]
At the time of recording on the disk 1, an analog audio signal input from the audio input terminal 18 is converted into a digital signal by the A / D converter of the D / A / A / D converter 8, and the audio expansion / compression circuit 7, the data is compressed to about 1/5. This audio data is temporarily written into the shock proof memory 6 by the memory controller 5 and then read out by the memory controller 5. The audio data read from the shock proof memory 6 is subjected to processing such as modulation and addition of an error correction code in the encoder / decoder / signal processing circuit 4, and at the same time, the magnetic field of the magnetic head 16 is applied. The optical pickup 2 irradiates a portion of the disc 1 which is in operation with a laser beam having an output larger than that during reproduction. Thus, the audio data is recorded on the disc 1.
[0022]
Next, the music division operation of the present apparatus will be described.
[0023]
On the disc 1 which is an MD, a lead-in area called TOC (Table Of Contents) is formed on the innermost side as a table of contents of the disc 1, and on the outer side immediately after this lead-in area, the user side A rewritable user TOC area (hereinafter, referred to as a U-TOC area) is formed. In the U-TOC area, data is schematically recorded as shown in FIG. In FIG. n is a value indicating the location in the U-TOC area where the address data of the position where the n-th song is recorded is recorded, and A, B, C. The first and last values of the address in the audio data recording area in which the music to be played at the music number,... Are recorded. Therefore, at the time of reproduction, first, the PTNO. 1 is read, and then the address at A is read to reproduce the first song. The data of No. 2 is read, and then the address in B is read, whereby the second music is reproduced, and so on.
[0024]
Here, it is assumed that music is recorded in the audio data recording area of the disk 1 as schematically shown in FIG. 3, and the contents of the U-TOC are correspondingly shown in FIG. . In FIG. 3, the TNO. 1, TNO. 2, TNO. 3, TNO. 4,... Indicate a track number, and the number below the track number indicates the address of the position where the music is recorded. In this case, the reproduction of the disc 1 is performed by the TNO. 1 → TNO. 2 → TNO. 3 → TNO. 4 →... Further, ST in FIG. 4 indicates a start address of a position where the music is recorded, and END indicates an end address.
[0025]
In the above-described recording state, when a predetermined music piece recorded on the disc 1 is divided into a plurality of pieces, during the reproduction of the music piece, the music division start key 19 is turned on at a point where the music piece is to be divided, and the part is divided. Specify as a point. At this time, when the music division start key 19 is turned on, the position of the division point designated by this operation is stored in the shock proof memory 6, and the portion for three seconds before and after this division point is repeatedly reproduced. In this reproducing operation, a notification sound is emitted from the notification sound generator 22 at the moment when the music division point is reproduced. By operating the dividing point advance key or the dividing point retreat key of the dividing point adjusting key 21, the above dividing point can be moved. That is, every time the split point advance key or the split point retreat key is operated, the data as the split point stored in the shock proof memory 6 is updated. FIG. 5 schematically shows the operation at this time. In the present embodiment, it is assumed that the division point moves forward or backward at intervals of 0.3 seconds of data by one operation of the division point advance key or the division point retreat key.
[0026]
Thereafter, when the music division input key 20 is turned on, data indicating the division point is recorded on the disk 1 at the finally designated position. In addition, the data in the U-TOC area of the disk 1 is rewritten accordingly. That is, in the state shown in FIG. 3, for example, when the third music is divided in the middle, as shown in FIG. 3 is a new TNO. 3 and TNO. 4 and TNO.4 in FIG. 4 is the TNO. 5 so that the subsequent TNO. Shift by one. Further, in the U-TOC region, the state shown in FIG. 3 and TNO. 4, the start address and the end address are changed. In addition, the subsequent TNO. And the address are out of correspondence. That is, the order of the reproduced music is changed.
[0027]
By recording the division points on the disk 1 as described above, a predetermined music piece on the disk 1 can be divided into a plurality of pieces, and the U-TOC information is rewritten according to this operation. By reading the U-TOC information, the optical pickup 2 can be immediately moved to the position of the division point, and the reproduction from that part can be performed quickly. Also, even if the power is turned off or the disc 1 is removed from the disc recording / reproducing apparatus, the above-mentioned division point and the U-TOC information are not erased because they are recorded on the disc 1 and are not recorded again. Reproduction from a division point is possible without performing an operation.
[0028]
In the above embodiment, the operation of dividing the music by recording the music division points on the disc 1 and the operation of recording the addresses of the front and rear parts of the divided music in the U-TOC are described. Is performed, but it may be configured to perform only the former or only the latter. For example, in a configuration in which only the former is performed, if the above-mentioned music division point is searched based on the output from the optical pickup 2, the position where the music division point is set can be easily reproduced. Further, in the configuration in which only the latter is performed, the U-TOC is read and the rear part of the divided music is reproduced, whereby the position where the music division point should be set can be easily reproduced.
[0029]
In the above-described embodiment, the music division point is recorded on the disc 1 by operating the music division start key 19 and then the music division input key 20. When the music division input key 20 is operated without operating the key 19, the music division point is immediately recorded at the position of the music being reproduced on the disk 1 when the music division input key 20 is operated. It may be. Instead of the notification sound generator 22 for notifying the music division point by the notification sound, a means for notifying the music division point by light, for example, may be provided.
[0030]
【The invention's effect】
As described above, according to the present invention, even when the power supply of the apparatus main body is turned off or the recording medium is taken out from the apparatus main body, the front part or the front part based on the data recorded in the table of contents area of the recording medium is used. Since the information data of the rear part can be individually reproduced, the operability in the case of repeatedly reproducing a predetermined portion of the information data recorded on the recording medium can be improved.
[0031]
Further, according to the present invention, since the position of the division point can be adjusted easily and quickly, the operability when extracting a predetermined portion of the information data recorded on the recording medium can be improved.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating an overall configuration of a recording / reproducing apparatus according to an embodiment of the present invention.
FIG. 2 is a schematic explanatory diagram showing a data recording state in a user TOC area of the disc shown in FIG.
FIG. 3 is a schematic explanatory diagram showing a data recording state before a division point is set in an audio data recording area of the disc.
4 is a schematic explanatory diagram showing a specific recording example of data corresponding to a recording state in a user TOC area shown in FIG. 2;
FIG. 5 is an explanatory diagram of a dividing operation for a predetermined music piece recorded on the disc.
FIG. 6 is a schematic explanatory view showing a data recording state after setting a division point in the audio data recording area shown in FIG. 3;
FIG. 7 is a schematic explanatory diagram showing a specific recording example of data corresponding to the recording state of FIG. 6 in the user TOC area shown in FIG. 4;
[Explanation of symbols]
Reference Signs List 1 disc 2 optical pickup 6 shock proof memory 9 microcomputer for system control 10 servo circuit 11 driver circuit 13 feed motor 15 head drive circuit 16 magnetic head 19 music division start key 20 music division input key 21 division point adjustment key 22 notification sound generation vessel

Claims (2)

L information data is recorded in an information data recording area with information data defined by a start point position and an end point position as one unit, and data indicating each information data start point position and end point position is recorded in the table of contents area. A recording / reproducing apparatus that reproduces desired information data from an information data recording area based on data read from a table of contents area while using a recording medium that has been
A division start key for designating one division point during reproduction of desired information data;
Storage means for storing position information indicating a division point designated by operating the division start key;
A dividing point adjustment key for adjusting the designated dividing point;
A split determination key for determining a split position corresponding to the split point,
Further, when the division start key is operated and the division point is designated after the N (positive integer) -th information data of the L information data is reproduced, the division point adjustment key is operated. The division point is moved in accordance with the operation of the adjustment key, and the position information of the moved division point is replaced with the position information stored in the storage means. When the division determination key is operated, the division point is stored in the storage means. Recording means for recording, in a table-of-contents area of said recording medium, data for setting a division position based on the obtained position information as an end point position of a front part and a start point position of a rear part of the information data. apparatus. The control means controls such that when the provisionally designated position of the division point is set in the N-th information data by operating the division start key, a predetermined portion near the provisionally designated position in the information data is reproduced. The information reproducing apparatus according to claim 2, wherein the information is reproduced.

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