JPH07114787A - Automatic erasing method for silence part of mini-disk - Google Patents

Abstract

PURPOSE:To erase a silent part with a simple operation. CONSTITUTION:After an optical pickup 3 is placed at an arbitrary position after a silent part existing at a first part of a desired track while reproducing with fast forwarding a mini-disk 1 for recording and reproducing which is already recorded, a front silent part erasing key of an operation section 14 is pressed. Then, a system controller 19 monitors output of an audio level detecting section 18, searches out a silent part being -70 dB or less, and specifies a finish point of the silent part by making an optical pickup detecting point at the time the specified point and reproducing from the start position of the present track to the specified point. And track separation is performed at the searched finish point, while the front side track being the silent part out of two separated tracks is erased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically erasing silent parts of a mini disk, and particularly when recording one or a plurality of songs on a mini disk, it is possible to easily remove the silent part generated before or after the beginning of a song. The present invention relates to a silent part automatic erasing method of a mini disk that can be erased in a single way.

[0002]

2. Description of the Related Art In car audio as well as home audio, digital audio by a CD player, a CD changer player or the like has been generalized, and it is possible to enjoy playing with high sound quality. However, in car audio, vibration of the vehicle is added to the set, which causes a problem of frequent skipping. Recently, a mini disk system, which makes use of the high sound quality of digital audio and is resistant to shocks, has been put into practical use, and is becoming popular mainly in car audio. This mini disk system uses a small mini disk as a recording medium, converts an audio signal into a compressed audio code and records the compressed audio code, and expands the compressed audio code read from the mini disk during playback.
By performing / A conversion and outputting, a sufficient performance time can be secured. In addition, the compressed voice code is read from the mini disk at high speed and intermittently and written to the buffer memory, the compressed voice code is continuously read from the buffer memory, and when a shock occurs, the read from the mini disk and to the buffer memory are performed temporarily. By interrupting the writing of, high shock resistance can be secured.

Such mini-discs include a read-only mini-disc in which music is recorded in advance by a software maker, and a recording / reproducing mini-disc in which a user can record and reproduce his / her favorite music. This recording / playback mini-disc can be divided into tracks (songs) at the location designated by the user when recording a music signal output from an analog source or a digital source, or after recording, and at the time of playback You can quickly find the beginning of a unit. In addition, various edits are possible on the recording / playback mini-disc, such as deleting a certain track,
Combine multiple tracks into one track, or vice versa,
One track can be separated into multiple tracks.

[0004]

By the way, when a certain piece of music is recorded on the recording / reproducing mini-disc, the user starts the reproduction of the source shortly after the mini-disc system is in the recording state. While recording is in progress, stop playback and start playback again, or at the end of recording,
Recording on the mini disk system may be stopped shortly after the playback is stopped. In these cases, silence occurs at the beginning, middle, or end of the song, and during playback,
You may have to wait a long time before the actual song starts playing, or you may be frustrated by a long silent state during or at the end of the song. Also, if there are many silent portions, it becomes impossible to effectively use an expensive mini disk for recording and reproducing.

In this case, in the conventional mini disk system, the silent portion can be erased by appropriately combining the track separation, the track erasing, and the track merging described above, but the operation is very complicated. was there. Specifically, as shown in FIG. 13 (1), a plurality of music pieces A to D are recorded on the recording / reproducing minidisk as track numbers 1 to 1.
FIG. 18 (1) shows the UTOC that has been recorded separately for 4 and is managed by the system controller on the memory (DRAM).
In order to erase the silent part CM ₁ at the beginning of the track number 3, first, the pickup detection position is set to the end point of the silent part CM _{1 by} a fast-forward reproduction operation, a pause operation, etc. First operation).
When the track separation operation is performed (second operation, FIG.
3 (2)), FIG. 13 (3), and FIG. 18 (2), the silent portion CM ₁ becomes the track number 3, the remaining track number 4 is the track number 4, and the track numbers 4 up to that point are tracks. It will be number 5. Next, the pickup reading position is set to the silent part CM by fast-reverse playback operation.
_When the track is moved to an arbitrary position in ₁ (third operation) and the track erasing operation is performed (fourth operation), see FIG. 13 (4), FIG. 14 (1) and FIG. 18 (3) Thus, the silent part of track 3 is erased, and the track number 4 up to that point is 3
Then, 5 becomes 4 and the silent portion CM _{1 in} the initial portion of the original track number 3 is erased (other music can be recorded in the erased portion). .

However, it is necessary to perform the first to fourth operations, and particularly, the first operation is troublesome, and if the operation is erroneous, the portion where the actual music signal of the song A is recorded is recorded. It may be erased accidentally. In addition, UTO on the memory
C is recorded in the UTOC area of the recording / reproducing mini-disc by being urged by an eject operation or the like.

When it is desired to erase the silent portion CM _{2 at} the end of the track number 3 after erasing the silent portion CM ₁ , the pickup reading position is set to the starting point of the silent portion CM _{2 by} a fast-forward reproduction operation or a pause operation. Match (first operation). Then, when the track separation operation is performed (second
14 (2)), and as shown in FIG. 14 (3), the silent part CM ₂ of the track number 3 becomes the track number 4, and the rest of the track number 3 remains the track number 3 and the track numbers up to that point. 4 becomes the track number 5. Next, when the pickup reading position is moved to an arbitrary position in the silent portion CM _{2 by} a fast-forward reproduction operation (third operation) and a track erasing operation is performed (fourth operation, see FIG. 14 (4)). ), As shown in FIG. 15 (1), the silent part CM ₂ of the track number 4 is erased, the track number 5 up to that point becomes 4, and the silent part CM _{2 at} the last part of the original track number 3 is deleted. It will be in the erased state. In this case as well, the same troublesome work as the erasing of CM ₁ is required.

Furthermore, if the silence CM ₃ in the middle of the track number 3 also wish to erase, first, fast reverse playback operation, silence C pickup reading position in such pause operation
Align with the starting point of M ₃ (first operation). When the track separation operation is performed (second operation, see FIG. 15 (2)), the track number 3 from the start position of the track number 3 to the start point of the silent portion CM ₃ remains as shown in FIG. 15 (3). , The track number 4 is from the start point of the silent portion CM ₃ to the end position of the original track number 3, and the original track number 4 is 5. Next, the pickup reading position is adjusted to the end point of the silent portion CM _{3 by} a fast-forward reproduction operation, a pause operation, or the like (third operation).
When the track separation operation is performed (fourth operation, FIG.
5 (4)), as shown in FIG. 16 (1), the silent part CM ₃ remains as the track number 4, and the track number 5 extends from the end point of the silent part CM ₃ to the end position of the track number 4 up to that point. The number 5 becomes 6.
Next, when the pickup reading position is moved to an arbitrary position in the silent portion CM ₃ (fifth operation) by a fast reverse reproduction operation or the like and a track erasing operation is performed (sixth operation, FIG. 16).
(2)), as shown in FIG. 16C, the silent part CM ₃ of the track number 4 is erased, the track number 5 up to that point becomes 4, and the track number 6 becomes 5. Finally,
When the pickup reading position is moved to an arbitrary position in the track number 4 by the fast forward reproduction operation or the like (seventh operation) and the track combining operation is performed (eighth operation, FIG. 17).
17 (2), the track number 4 is combined with the previous track number 3 to become a new track number 3 as shown in FIG. 17 (2), and the track number 5 up to that point becomes the track number 4 and finally The silent portion CM ₃ which was in the middle of the original track number 3 is erased.
However, the first to eighth operations must be performed, and extremely complicated operations must be performed.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a silent portion automatic erasing method for a mini disk, which can erase a silent portion by a simple operation.

[0010]

According to the present invention, there is provided a means for searching a silent portion whose audio level is below a certain level while reproducing a recorded recording / reproducing mini-disc, and a non-silent portion for the silent portion. This is achieved by providing means for separating tracks from a portion and means for erasing tracks of silent portions.

[0011]

According to the present invention, while reproducing a recorded recording / reproducing mini-disc, a silent portion whose audio level is below a certain level is searched for, and the silent portion is separated from the non-silent portion by a track. Erase the track. As a result, the silent portion can be easily erased without the need for the user to accurately find the start point and the end point of the silent portion in the fast-forward reproduction operation, or to perform the track separation operation or the track erase operation. .

When a point on a desired track of a recorded recording / reproducing mini-disk is designated, the audio level becomes below a certain level while reproducing between the designated point and the start position of the track. Find the end point of the silent part, and move the track from the start position of the track to the end point of the silent part or slightly before the end point,
The track is separated into two tracks from the end point of the silent portion or slightly before the end point to the end position of the track, and the former track of the separated tracks is erased. This allows
Even if the user does not accurately find the end point of the silent part by the fast-forward playback operation or perform the track separating operation or the track erasing operation, simply select an arbitrary point after the first silent part of the desired track. It is sufficient to specify, and the silent portion at the beginning of the desired track can be erased automatically and quickly by an extremely simple operation.

When one point in the desired track of the recorded recording / reproducing mini-disk is designated, the audio level becomes below a certain level while reproducing between the designated point and the end position of the track. Find the start point of the silent part, and move the track to the end position of the track from the start position of the track to the start point of the silence part or slightly after the start point, or from the start point of the silence part or slightly after the start point. Up to two tracks are separated, and the latter track of the separated tracks is erased. This makes it possible to simply search for the starting point of a silent part in fast-forward playback operation, etc., or to select any one point before the last silent part of the desired track without performing track separation operation or track erase operation. Can be specified, and the silent portion at the end of the desired track can be erased automatically and quickly with an extremely simple operation.

Further, when two points including a silent portion in a desired track of a recorded recording / reproducing mini disk are designated,
While playing back between the two points, the start point and end point of the silent part where the audio level is below a certain level are searched, and the start point (end point) of the silent part is set to the start position (end position) of the track. When the track is being played, the track is started from the start position of the track to the end point of the silence part or slightly before the end point (from the start position of the track to the start point of the silence part or slightly after the start point) The track is divided into two tracks from the end point of the part or slightly before the end point to the end position of the track (from the start point of the silent part or slightly after the start point to the end position of the track) The track (the latter track) is erased. This allows
If there is a silent part in the first part (last part) of the desired track, you can specify the start position of the desired track and any point after the silent part (any point before the silent part of the desired track). , It is possible to erase silent parts easily, automatically and quickly.

Further, when two points including a silent portion in a desired track of a recorded recording / reproducing mini disk are designated,
While playing between the two points, the start point and end point of the silent part where the audio level is below a certain level are searched for, and the start point of the silent part does not match the start position of the track, and When the end point does not coincide with the end position of the track, move the track from the start position of the first track ...
The start point of the silence or a little after the start point The second track ... The start point of the silence part or a little after the start point to the end point of the silence part or a little before the end point Third track ... The track is separated into three tracks from the end point or slightly before the end point to the end position of the relevant track, the second track is erased, and the first and third tracks are combined into one track. To do. As a result, it is possible to accurately find the start and end points of a silent portion by performing fast-forward playback operation and fast-reverse playback operation, or to perform any two operations before and after the silent portion of a desired track without performing track erasing operation or track combining operation. If a point is specified, the silent part can be erased easily, automatically and quickly.

Further, while playing a recorded recording / playback mini-disc, a silent portion having a certain length or more and having an audio level below a certain length is searched for, and the silent portion is separated from the non-silent portion by a track. Erases the track. As a result, it is possible to surely erase only the unnecessary silent portion generated during recording without erroneously erasing the silent portion existing in the composition of the music.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall block diagram of a mini disk system embodying a method for automatically erasing silent parts of a mini disk according to the present invention. Reference numeral 1 denotes a recorded recording / playback mini-disc, which has UTOC information and compressed music data in a groove area.
TOC information is recorded in the innermost pit area. Two
Is a spindle motor, which rotates the recording / reproducing mini disk 1 at a predetermined constant linear velocity under the control of a spindle servo system. An optical pickup 3 irradiates the recording / reproducing minidisk 1 with a laser beam and detects a signal recorded on the recording / reproducing minidisk 1 from the reflected beam.
Is a feed motor for feeding the optical pickup 3 in the radial direction of the recording / reproducing minidisk 1, 5 is a recording head, and 6 is a head driver for driving the recording head. Reference numeral 7 denotes an RF amplifier that creates an RF signal and an EFM signal, a focus error signal, a tracking error signal, a CLV control signal, etc. from the detection signal of the optical pickup 3, and 8 demodulates the address data recorded by the meandering of the groove from the RF signal. The address decoder 9 is a digital signal processing circuit that demodulates and outputs UTOC information and compressed music data from the EFM signal and outputs the address data input from the address decoder. When recording the UTOC information, the EFM signal is used. The signal is converted into a signal and output to the head driver 6 to drive the recording head 5. Reference numeral 10 applies focus servo and tracking servo to the optical pickup 3 based on the focus error signal and tracking error signal, applies thread servo to the feed motor 4, and spindles to the spindle motor 2 based on the CLV control signal. It is a servo circuit for applying a servo, and also has a function of detecting the occurrence of a shock and notifying it to a system controller described later. The recording / reproducing mini-disk 1 is intermittently reproduced at high speed under the control of the system controller, and when a shock occurs, the optical pickup 3 is returned to the original position and the reproduction is resumed.

Reference numeral 11 indicates TOC information, UTOC information,
A buffer memory (DRAM) 12, which can store compressed music data for a predetermined time, carries out predetermined communication with the system controller and stores compressed music data intermittently input from the digital signal processing circuit 9 in the buffer memory 11
Is a shock-proof memory controller that intermittently writes data to the compressed music data and outputs compressed music data continuously in parallel with the writing. When a shock occurs, the writing is suspended while the reading is continued, and the optical pickup 3 returns to the original state. After returning to the position, writing is restarted. Reference numeral 13 is an ATRAC decoder for decompressing compressed music data and converting it into music data, which is a D / A converter (not shown)
Output to.

Reference numeral 14 designates a PLAY key, a pause / pause release key, a STOP key, a fast-forward playback key, a fast-reverse playback key, a seek key, an eject key, etc. used for various performance operations, as well as track erasing, track separation, track joining, etc. It is an operation unit having various editing operation keys for performing various types of editing. Among the various editing operation keys, a front silent portion erasing key, a rear silent portion erasing key, and a pointless silent portion erasing key are included. There is. 15 is the track number
A display section for displaying elapsed time of performance, etc., 16 a disk loading detection section for detecting loading of a mini disk, 17 a loading section for loading / unloading a mini disk, 18 a compressed music output from a digital signal processing circuit An audio level detection unit that inputs data and detects an audio level in units of sound frames.

Reference numeral 19 denotes a system controller which controls the entire system, and when a disc loading detection signal is input from the disc loading detection unit 16, the loading unit 1
After controlling 7 to load the mini disc,
By controlling each part of the set, the optical pickup 3, the RF amplifier 7, and the digital signal processing circuit 9 read the TOC information from the mini disk and store it in the buffer memory 11. Then, it is checked from the TOC information whether the mini disk is for recording / reproducing, and if it is for recording / reproducing, the UTOC information is further read and stored in the buffer memory 11. Operation part 1
In accordance with the normal operations in 4 (PLAY, pause / pause release, STOP, fast-forward playback, fast-reverse playback, seek), perform predetermined control for each part of the set, normal playback, pause / pause release, fast-forward Operations such as reproduction, fast reverse reproduction, seek, and STOP are performed, and during reproduction, address data is read from the recording / reproducing minidisk 1 by the optical pickup 3, the RF amplifier 7, and the address decoder 8.
It is input through the digital signal processing circuit 9, the track number and the elapsed playing time are obtained by referring to the UTOC information and displayed on the display unit 15.

Further, the system controller 19 stores in the buffer memory 11 according to the editing operation (track erasing, track separation, track merging, front silent part erasing, rear silent part erasing, two-point silent part erasing) by the operation unit 14. Track erasure, track separation, track merging, front silent part erasure, rear silent part erasure for the UTOC information
Performs various editing processes to erase silent parts between dots. Of these, the front silent part erasure will be described. When the current position of the optical pickup 3 is at a certain position on a certain track (any of the normal reproduction state, the fast-forward reproduction state, the fast-reverse reproduction state, and the pause state). However, when the front silent portion erasing key of the operation unit 14 is pressed, the current position of the optical pickup 3 is set as a designated point, and the audio level is normally reproduced from the start position of the certain track to the designated point. The audio level detected by the detector 18 is -7.
Find the end point of the silent part that is 0 dB or less.
Then, the original track is separated into two tracks at the end point, and the front track of the separated tracks is erased, so that the silent part existing in the first part of the original track is removed. to erase.

Further, the rear silent erasure will be described. In the state where the current position of the optical pickup 3 is at a certain position of a certain track (normal reproduction state, fast-forward reproduction state, fast-reverse reproduction state, pause state). When any of the rear silent part erasing keys of the operation unit 14 is pressed, the current position of the optical pickup 3 is set as a designated point, and from the designated point to the designated point from the end position of the certain track. During normal reproduction, the start point of the silent portion where the audio level detected by the audio level detecting unit 18 is -70 dB or less is searched for. Then, the original track is separated into two tracks at the start point, and the rear track of the separated tracks is erased, so that the silent part existing at the last part of the original track is erased. Erase.

To explain the silent erasing between two points, in a state where the current position of the optical pickup 3 is at a certain position of a certain track (normal reproduction state, fast-forward reproduction state, fast-reverse reproduction state, temporary reproduction state). When the silent point erase key between two points of the operation unit 14 is pressed, the current position of the optical pickup 3 is set as the first designated point. After that, when the current position of the optical pickup 3 is moved by a fast-forward reproduction operation or the like, and then the silent point erase key between the two points of the operation unit 14 is pressed again, the current position of the optical pickup 3 at that time is changed to the first position. 2 Set as a designated point. Then, while the normal playback is performed from the first designated point to the second designated point, the start point and the end point of the silent portion where the audio level detected by the audio level detection unit 18 is −70 dB or less are searched for. Then, the original track is divided into three tracks from the start position of the original track to the start point of the silent part, from the start point to the end point of the silent part, and from the end point to the end position of the original track. After that, erase the middle track.

2 to 5 are flowcharts showing the silent part automatic erasing process by the system controller 20, FIGS. 6 to 8 are explanatory views of the silent part automatic erasing method, and FIGS. 9 to 11 are stored in the buffer memory 11. Explanatory diagram of UTOC information, Fig. 1
Reference numeral 2 is an explanatory diagram of the silent portion detection method, which will be described below with reference to these drawings. When the recorded recording / reproducing mini-disc 1 is loaded into the set, the disc loading detection unit 16 outputs a disc loading detection signal, and the system controller 19 having received the detection signal controls the loading unit 17 to load the disc. (Step 101 in FIG. 2,
102). Subsequently, the system controller 19 controls each part of the set so that the TOC information recorded on the recording / reproducing minidisk 1 is read by the optical pickup 3, the RF amplifier 7, and the digital signal processing circuit 9 and stored in the buffer memory 11. (Step 103). And TOC
It is checked from the information whether it is for recording and reproduction (step 10
4) Since it is YES, the UTOC information recorded on the recording / reproducing mini disk 1 is read by the optical pickup 3, the RF amplifier 7, and the digital signal processing circuit 9 and stored in the buffer memory 11 (step 105).

The songs and the UTOC information recorded on the recording / reproducing mini-disc 1 are as shown in FIGS. 6 (1) and 9 (1), and the C song recorded in the track number 3 is the first song. Unnecessary silence CM for the part, middle part and last part
It is assumed that _{1 to} CM ₃ exist. Step 105
After that, the system controller 19 refers to the UTOC information, searches the beginning of the first track, and starts the reproduction of the song A (step 106). During reproduction, the compressed music data recorded on the recording / reproducing mini disk 1 is read and demodulated by the optical pickup 3, the RF amplifier 7, and the digital signal processing circuit 9. Then, the shock proof memory controller 13 writes to the buffer memory 11 and reads from the buffer memory 11,
The TRAC decoder 13 decompresses and converts it into normal music data, and then outputs it to a D / A converter (not shown). The address data recorded on the recording / reproducing mini disk 1 is read and demodulated by the optical pickup 3, the RF amplifier 7, and the address decoder 8, and input to the system controller 19 via the digital signal processing circuit 9. Based on the input address data, the system controller 19 refers to the UTOC information and causes the display unit 15 to display the track number (music number) and the elapsed playing time.
The audio level detection unit 18 detects the audio level in sound frame units based on the compressed music data output from the digital signal processing circuit 9.

Here, the user selects the start position Z _{3 of the} C song.
When it is desired to erase the silent portion CM ₁ existing in the range from Z to Z ₄ , the fast-forward reproduction operation is performed on the operation unit 14 to perform the silent portion CM _1.
Arbitrary performance part (P ₁ ) of C ₁ between the silent part and CM ₃
To the normal playback or stop the fast-forward playback operation or perform a pause operation (steps 107, 10).
8) Press the front silent part deletion key of the operation unit 14.
Then, the system controller 19 proceeds to step 109,
110, YES is determined in step 201 of FIG. 2, and the address data (indicating the current detection position of the optical pickup 3) input immediately before is set as the designated point (P ₁ ) (step 202, FIG. 6 (2)). reference). Then, after searching the start position Z ₃ of the track number 3 with reference to the UTOC information, while usually to regenerate the up specified point P ₁ from the starting position Z _3, monitors the output of the audio level detector 18, locate the silence CM ₁ which has a -70dB or less, to identify the end point Z ₄ of the wireless sound portion CM ₁ (step 203, FIG. 11 (1) see).

Thereafter, the system controller 19 separates the track at the end point Z ₄ , and the track number 3 is
There are two tracks from the start position Z ₃ to Z ₄ and the track Z ₄ to the end position Z ₈ (step 204). Then, the UTOC information of the buffer memory 11 becomes as shown in FIG. 9 (2), and the recording / reproducing mini disc 1
In the state shown in FIG. 6C, each music piece is recorded. That is, the silent part CM ₁ becomes the track number 3, the C song except the silent part CM ₁ becomes the track number 4, and the D song becomes the track number 5. When performing the processing of step 204, the tracks may be separated slightly before Z ₄ (for example, at a position where the silent portion CM ₁ is entered for 0.2 sec).

Next, the system controller 19 turns off the silence.
Partial CM₁Erase the track number 3 related to
205). Then, the UTOC information of the buffer memory 11 is
The information is as shown in Fig. 9 (3).
In the state shown in FIG. 6 (4), each music piece is recorded. Immediately
Chi, the silent part CM₁C song except for is track number 3.
Thus, the D song becomes track number 4. Step 205
Also, the system controller 19 is the track that was deleted this time.
The track in front of the track (track number 2 for song B)
Position Z₃Go back a little earlier to start normal playback
(Step 206). Therefore, the user can ₁
You can confirm that has been deleted.

Next, the user selects Z of track number 3.₇Or
End position Z₈Existing silent CM₂Erase
To perform fast-forward playback operation on the operation unit 14,
CM part of silent number 3₃And silence CM₂Between C
₂Arbitrary performance part (P₂) And fast forward playback operation
Was stopped to shift to normal playback or a pause operation was performed.
After that (steps 107 and 108 in FIG. 2), the operation unit 14
Press the rear silent part deletion key. Then the system
The controller 19 performs steps 109 and 110, as shown in FIG.
The address entered immediately before is judged as YES in step 207.
Data (indicates the current detection position of the optical pickup 3)
Designated point (P₂) (Step 208, FIG. 7)
(See (1)). Then, referring to the UTOC information,
Specified point P of track number 3₂After searching for
₂To end position Z of track number 3₈Up to normal again
Monitor the output of the audio level detector 18 while
As seen, the silent CM that is less than -70 dB₂To
Finding out, the silent CM ₁Starting point Z₇Identify
(Step 209, see FIG. 11 (2)).

Thereafter, the system controller 19 performs track separation at the starting point Z ₇ and sets the track number 3 to
There are two tracks from the start position Z ₄ to Z ₇ and the track Z ₇ to end position Z ₈ (step 210). Then, the UTOC information in the buffer memory 11 becomes as shown in FIG. 10 (1), and each tune is recorded in the recording / reproducing mini-disc 1 as shown in FIG. 7 (2).
Ie, C song track number 3 becomes except silence CM _2, silence CM ₂ is track number 4 becomes, D song is track number 5. Note that when performing the processing of step 210, it is slightly behind Z ₇ (for example, 0.2 sec.
Alternatively, the tracks may be separated only at the silent portion CM ₂ ).

Then, the system controller 19 turns off the silence.
Partial CM₂Erase the track number 4 related to
211). Then, the UTOC information of the buffer memory 11 is
The information is as shown in Fig. 10 (2), and a mini disk for recording and reproduction.
As shown in FIG. 7 (3), each piece of music is recorded in No. 1.
That is, the silent part CM₂C songs except for track number 3
And the D song becomes the track number 4. Step 211
After that, the system controller 19
Of the track in front of the track (track number 3 related to C song)
End position Z₇Let's go back a little bit and start normal playback
(Step 206). Therefore, the user can
₂You can confirm that has been deleted.

Finally, the user selects Z _{5 of} track number 3.
When it is desired to erase the silent portion CM ₃ existing from the first to Z _{6 position} , a fast reverse reproduction operation is performed on the operation unit 14 to advance to an arbitrary performance portion (P ₃ ) of C ₁ before the silent portion CM ₃ of the track number 3. After the fast-reverse reproduction operation is stopped to shift to the normal reproduction or the pause operation is performed (steps 107 and 108 in FIG. 2), the 2-point silent portion erasing key is pressed. Then, the system controller 19 proceeds to step 1
09, 110, YES in step 301 of FIG. 4, and the address data (optical pickup 3
(Indicating the current detection position of) is set as the first designated point (P ₃ ) (step 302, see FIG. 7 (4)). Similarly, proceeding to any playing position silence CM ₃ from behind C ₂ of the track number 3 performs fast forward playback operation at the operation unit 14 (P _4), it stops the fast forward reproduction operation or to shift to the normal reproduction After performing a pause operation (Step 30
(3, 304), and again presses the silent part deletion key between two points. Then, the system controller 19 sets the address data (which indicates the current detection position of the optical pickup 3) input immediately before as the second designated point (P ₄ ) (steps 305 and 306, see FIG. 7 (4)).

After that, the system controller 19
After confirming that the first designated point P ₃ and the second designated point P ₄ do not match the start position and end position of the track number 3 (steps 307 and 308), the first designated point P ₃
After searching the first designated point P ₃ on the front side of the second designated point P ₄ and then normally playing back from P ₃ to P ₄ ,
The output of the audio level detector 18 is monitored and
Locate the silence CM ₃ which has a dB or less, to identify a starting point Z ₅ of the wireless sound portion CM ₃ the end point Z ₆ (step 401 in FIG. 5, FIG. 12 (3) refer).

Subsequently, the system controller 19 starts
Point Z_FiveAnd the end point Z₆Track to separate the original track.
Set the number 3 to the starting position Z of the track._FourTo Z_Five
Up to the first track and Z_FiveTo Z₆Up to the second track
Ku and Z₆To end position Z ₇Up to 3 of the 3rd track
One track (step 402). Then,
The UTOC information of the far memory 11 is as shown in FIG.
As shown in FIG.
The song is recorded. That is, the silent part CM₃Than
Previous C₁Becomes track number 3 and CM is silent₃But
Track number 4 and silent CM₃After C₂
Becomes track number 5, and D song becomes track number 6.
Become. When performing the process of step 402, Z_FiveThan
A little bit behind and Z₆A little before (for example, 0.
2 sec silent CM₃At the position where you entered)
You may make it separate.

Subsequently, the system controller 19 erases the track number 4 relating to the silent portion CM ₃ (step 403). Then, the UTOC information of the buffer memory 11 becomes as shown in FIG. 11 (1), and each tune is recorded in the recording / reproducing mini-disc 1 as shown in FIG. 8 (2).
That is, C ₂ becomes track number 4, and D song becomes track number 5. Further, the system controller 19 combines the tracks before and after the erased track this time (step 404). Then, the UTOC of the buffer memory 11
The information is as shown in FIG. 11 (2), and each song is recorded on the recording / reproducing mini-disc 1 as shown in FIG. 8 (3). That is, the C tune in which C ₁ and C ₂ are combined becomes the track number 3, and the D tune becomes the track number 4. Step 4
After 04, the system controller 19 returns to a position slightly before the end position Z ₅ of C _{1 on} the front side of the tracks that have been joined this time, and starts normal reproduction (step 405). Therefore, the user can confirm that the silent portion CM ₃ has been erased.

In this way, the original track number 3
After the erasing of the silent parts CM _{1 to} CM ₃ is completed, when the operation unit 14 performs an eject operation, the system controller 19 searches the UTOC area of the recording / reproducing minidisk 1 and then the UTOC information of the buffer memory 11 is searched. After recording in the UTOC area by the digital signal processing circuit 9, the head driver 6, and the recording head 5, the loading unit 17 is controlled to unload (FIG. 2).
111 to 113).

According to this embodiment, when it is desired to erase an unnecessary silent part existing in the first part of a certain track, the detection position of the optical pickup 3 is set to an arbitrary position after the silent part by a fast-forward reproduction operation or the like. After moving, it is automatically operated by a simple operation of pressing the front silent part deletion key,
In addition, it can be erased quickly. Similarly, when it is desired to erase an unnecessary silent portion existing at the last portion of a certain track, the detection position of the optical pickup 3 can be set to a position before the silent portion by a fast-forward reproduction operation or the like. After moving to an arbitrary position, it can be automatically and quickly erased by a simple operation of pressing the rear silent portion erase key. Also, when it is desired to erase an unnecessary silent portion existing in the middle of a certain track, the detection position of the optical pickup 3 is moved to an arbitrary position before and after the silent portion by a fast-rewind reproducing operation or a fast-forward reproducing operation. After that, it is possible to erase automatically and quickly by a simple operation of pressing the silent part erasing key between two points.

It should be noted that in the above embodiment, there is no two point
The first designated point P designated by pressing the sound partial erase key₃
(Or the second designated point P_Four) Is the current position of the pickup
That it matched the starting position of the existing track number
(YES in step 307 of FIG. 4), P_Four(Or P
₃) To P₁After that (step 309), the step of FIG.
Go to step 203 and execute the front silent part automatic erasing process,
On the contrary, the first designated point P ₃(Or the second designated point P_Four) Is
The end of the track number where the current position is
When it matches the position (YE in step 307 of FIG. 4)
S), P_Four(Or P₃) To P₂After doing (step
309), and proceed to step 209 in FIG.
The dynamic erasing process is executed. However, steps 307 and 308
Instead of checking
The start point of the silent part that has started is the current position of the pickup.
That it matched the starting position of the existing track number
Then, proceed to step 204 in FIG.
The end point of the silent part found in step 401 of step 5
The end of the track number where the current position is
If the position matches, proceed to step 210 in FIG.
You may do it.

In the above embodiment, after moving the detection position of the optical pickup 3 to the front and back of the silent portion of the desired track, the front silent portion erasing key, the rear silent portion erasing key, and the two-point silent portion erasing key are pressed. By pressing, the range to search for the silent part is specified, but unlike this, the detection position of the optical pickup is moved to an arbitrary position on the desired track (or the track number of the desired track is displayed on the display. If the automatic deletion is indicated in the displayed state, the system controller searches for each start point and end point of one or more silent parts while playing the entire desired track, and detects each silent part as a start point or a start point. Separate the track slightly behind and slightly before the end point,
Of the separated tracks, if you want to erase the part related to the silent part, or if you just instruct only automatic deletion,
The system controller sequentially searches for silences while playing all the tracks recorded on the recording / playback mini-disc, and separates tracks at the start or end of each silence and slightly before or after the end. Then
Of the separated tracks, the one relating to the silent part may be erased. At this time, a certain length or more (for example, 5
By separating and erasing only the silence part of (sec or more), it is possible to erase only the unnecessary silence part without accidentally erasing the silence part existing in the composition of the music.

[0040]

As described above, according to the present invention, after reproducing a recorded recording / reproducing mini-disc, a silent portion whose audio level is below a certain level is searched for, and the silent portion is separated from the non-silent portion by tracks. Since it is configured to erase tracks in silent parts, it is easy for the user to perform fast forward playback operations without finding the start and end points of silent parts, or performing track separation and track deletion operations. It is possible to erase silent parts.

When one point on the desired track of the recorded recording / reproducing mini-disk is designated, the audio level becomes below a certain level while reproducing between the designated point and the start position of the track. Find the end point of the silent part, and move the track from the start position of the track to the end point of the silent part or slightly before the end point,
The track is separated into two tracks from the end point of the silent part or slightly before the end point to the end position of the track, and the former track of the separated tracks is erased. Even if you don't exactly find the end point of the silent part, and do not perform track separation operation or track erase operation, you can simply specify any one point after the first silent part of the desired track. With a simple operation, the silent portion at the beginning of the desired track can be erased automatically and quickly.

When one point in the desired track of the recorded recording / reproducing mini-disk is designated, the audio level becomes below a certain level while reproducing between the designated point and the end position of the track. Find the start point of the silent part, and move the track to the end position of the track from the start position of the track to the start point of the silence part or slightly after the start point, or from the start point of the silence part or slightly after the start point. Up to two tracks are separated, and the latter track of the separated tracks is configured to be erased. Therefore, the start point of the silent part can be accurately found by the fast-forward playback operation, and the track separation operation and the track deletion operation can be performed. Even if you do not do it, simply specify any one point before the last silent part of the desired track, and with the extremely simple operation, you can Silence present in automatically, and can be erased quickly.

When two points including a silent portion in a desired track of a recorded and reproducing mini-disk are designated,
While playing back between the two points, the start point and end point of the silent part where the audio level is below a certain level are searched, and the start point (end point) of the silent part is set to the start position (end position) of the track. When the track is being played, the track is started from the start position of the track to the end point of the silence part or slightly before the end point (from the start position of the track to the start point of the silence part or slightly after the start point) The track is divided into two tracks from the end point of the part or slightly before the end point to the end position of the track (from the start point of the silent part or slightly after the start point to the end position of the track) Since there is a silence in the first part (last part) of the desired track, it is configured to erase the other track (the latter track). By specifying an arbitrary point after the start position and silence of the desired track (desired track any point prior to silence), simple silence automatically, and can be quickly erased.

When two points including a silent portion in a desired track of a recorded recording / reproducing mini disk are designated,
While playing between the two points, the start point and end point of the silent part where the audio level is below a certain level are searched for, and the start point of the silent part does not match the start position of the track, and When the end point does not coincide with the end position of the track, move the track from the start position of the first track ...
The start point of the silence or a little after the start point The second track ... The start point of the silence part or a little after the start point to the end point of the silence part or a little before the end point Third track ... The track is separated into three tracks from the end point or slightly before the end point to the end position of the relevant track, the second track is erased, and the first and third tracks are combined into one track. With this configuration, you can accurately find the start and end points of the silent part by fast forward playback operation and fast rewind playback operation, or you can skip the silent part of the desired track before and after the track erasing operation and track merging operation. If you specify any two points of, the silent part is easy, automatic, and
It can be erased quickly.

While reproducing the recorded mini-disk for recording and reproducing, a silent portion having a certain length or more and having an audio level below a certain length is searched for, and the silent portion is separated from the non-silent portion by a track. Since the track erasing is performed, it is possible to surely erase only the unnecessary silent portion generated during recording without erroneously erasing the silent portion existing in the composition of the music.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a mini disk system embodying a method for automatically erasing silent parts of a mini disk according to the present invention.

FIG. 2 is a first flowchart showing a silent part automatic erasing process of the system controller.

FIG. 3 is a second flowchart showing a silent part automatic erasing process of the system controller.

FIG. 4 is a third flowchart showing a silent part automatic erasing process of the system controller.

FIG. 5 is a fourth flowchart showing a silent part automatic erasing process of the system controller.

FIG. 6 is an explanatory diagram of a silent portion automatic erasing method.

FIG. 7 is an explanatory diagram of a silent portion automatic erasing method.

FIG. 8 is an explanatory diagram of a silent portion automatic erasing method.

FIG. 9 is an explanatory diagram of UTOC information managed on a RAM.

FIG. 10 is an explanatory diagram of UTOC information managed on a RAM.

FIG. 11 is an explanatory diagram of UTOC information managed on a RAM.

FIG. 12 is an explanatory diagram of a silent portion detection method.

FIG. 13 is an explanatory diagram showing a conventional silent part erasing procedure.

FIG. 14 is an explanatory diagram showing a conventional silent part erasing procedure.

FIG. 15 is an explanatory diagram showing a conventional silent part erasing procedure.

FIG. 16 is an explanatory diagram showing a conventional silent part erasing procedure.

FIG. 17 is an explanatory diagram showing a conventional silent part erasing procedure.

FIG. 18 is an explanatory diagram of UTOC information managed on a RAM when erasing a conventional silent portion.

[Explanation of symbols]

 1 Recording / Playback Mini Disc 3 Optical Pickup 5 Recording Head 7 RF Amplifier 8 Address Decoder 11 Buffer Memory 14 Operation Section 18 Audio Level Detection Section 19 System Controller

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G11B 27/10 A 8224-5D

Claims (6)

[Claims] 1. Playback of a recorded recording / playback mini-disc, searching for a silent portion whose audio level is below a certain level, separating the silent portion from the non-silent portion, and then erasing the track of the silent portion. The method for automatically erasing silent parts of mini discs is characterized by the above. 2. When one point in a desired track of a recorded recording / reproducing mini-disk is designated, the audio level becomes below a certain level while reproducing between the designated point and the start position of the track. Find the end point of the silent part, and move the track to the end position of the track from the start position of the track to the end point of the silence part or slightly before the end point, or just before the end point of the silence part or slightly before the end point. Up to two tracks up to, and the former track of the separated tracks is erased. 3. When a point on a desired track of a recorded recording / reproducing mini disk is designated, the audio level becomes below a certain level while reproducing between the designated point and the end position of the track. Find the starting point of the silent part, and move the track to the end position of the track from the start position of the track to the starting point of the silent part or slightly after the starting point, or from the starting point of the silent part or slightly after the starting point. Up to two tracks up to, and the latter track of the separated tracks is erased, the silent part automatic erasing method of the mini disk. 4. When two points including a silent portion in a desired track of a recorded and reproducing mini-disk are designated, a silent portion whose audio level is below a certain level while reproducing between the two points. When the start point (end point) of the silent part matches the start position (end position) of the track, the track is started from the start position of the track and the end point of the silent part is searched. Or slightly before the end point (from the start position of the track to the start point of the silence part or slightly after the start point) and from slightly before the end point or end point of the silence part to the end position of the track (silence part The track is separated into two tracks from the start point or a little after the start point to the end position of the track). Silence automatic erase method minidisk it has to perform erasing, characterized by the. 5. When two points including a silent portion in a desired track of a recorded and reproducing mini-disk are designated, a silent portion whose audio level is below a certain level while reproducing between the two points. If the start point of the silent part does not match the start position of the track and the end point of the silent part does not match the end position of the track, Track 1 ... From the start position of the track,
The start point of the silence or a little after the start point The second track ... The start point of the silence part or a little after the start point to the end point of the silence part or a little before the end point Third track ... The track is divided into three tracks from the end point of the part or slightly before the end point to the end position of the track, the second track is erased, and the first track and the third track are combined into one track. The method for automatically erasing silent parts of mini discs, which is characterized in that 6. A soundless portion having a certain length or more and having an audio level below a certain level is searched while reproducing a recorded recording / reproducing mini-disc, and the soundless portion is track-separated from the non-silent portion. The method for automatically erasing tracks on a mini disk automatically erases silent areas.