JPH05282788A - Recording medium playback device - Google Patents

Abstract

(57) [Summary] [Purpose] To continuously play multiple specified locations on a CD without making any breaks in the sound. [Structure] The control unit 1 uses the C designated by the key input unit 2.
The position of each point in D3 is set to R through the signal processing unit 11.
Store in AM12. Under the control of the control unit 1, the optical pickup 8 sequentially reproduces a portion corresponding to the position of each designated location stored in the RAM 12, and outputs it to the demodulation circuit 10 and the signal processing unit 11. Under the control of the control unit 1, the signal processing unit 11 stores the reproduction data from the demodulation circuit 10 in the RAM 13 and sequentially reads the reproduction data from the RAM 13 and outputs it at a constant speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium reproducing apparatus, and more particularly to a recording medium reproducing apparatus capable of continuously reproducing a plurality of positions on a recording medium by arbitrarily selecting the positions.

[0002]

2. Description of the Related Art There are 4 CDs (compact discs).
CIRC (Cross Interleave) with 16-bit audio signal sampled at 4.1 kHz
Digital data called subcodes such as music heads and time information encoded by the e Read Solomon code system are combined and stored.

Conventionally, although a CD has functions such as finding the beginning of a song and repeating a part of a song, it is only possible to listen to the song contained in the CD as it is.

[0004]

Therefore, in the conventional CD player, in order to enjoy music and the like according to one's own preference, one portion of a song is arbitrarily selected at a plurality of places, and those portions are selected without making a break in the sound. It could not be played continuously. This is because it takes a little time to move the optical pickup between the end of reproduction of one part of the CD and the start of reproduction of the next part.

An object of the present invention is to arbitrarily select a plurality of locations on a recording medium, edit a song or the like to one's liking, and continuously reproduce each selected location without producing a break in the sound. It is an object to provide a recording medium reproducing device that can be performed.

[0006]

A recording medium reproducing apparatus according to the present invention comprises a designating means for designating positions of a plurality of locations on a recording medium, and a first storage means for storing the location of each location designated by the designating means. Reproducing means for sequentially reproducing a portion of the recording medium corresponding to the position of each designated location stored in the first storage means and outputting a reproduced signal; and a reproduced signal output from the reproducing means for storing as reproduced data. Second storage means, output means for reading out reproduction data from the second storage means and sending out as an output signal at a constant speed, and reproduction means for ending reproduction of one designated location on the recording medium and other designated location. Control means for controlling the output means so that the output signal is sent from the output means at a constant speed until the reproduction is started.

[0007]

In the recording medium reproducing apparatus having the above-mentioned structure, the control section 1 stores the positions of the respective points on the CD 3 designated by the key input section 2 in the editing point storing RAM 12 via the signal processing section 11. Under the control of the control unit 1, the optical pickup 8 sequentially reproduces a portion of the CD 3 corresponding to the position of each designated location stored in the editing point storage RAM 12, and reproduces a reproduction signal through a demodulation circuit 10 to a signal processing unit. Output to 11. Under the control of the control unit 1, the signal processing unit 11 uses the reproduction signal of each designated portion in the CD 3 output from the demodulation circuit 10 as reproduction data and the editing RAM 1
Store in 3. On the other hand, under the control of the control unit 1, the signal processing unit 11 sequentially reads the reproduction data from the editing RAM 13 and sends it as an output signal at a constant speed.

Thus, a plurality of locations on the recording medium can be arbitrarily selected, and the music or the like at each of the selected locations can be edited to suit one's preference, and each location selected as edited without producing a break in the sound can be edited. It can be played continuously.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a CD player to which the present invention is applied. In FIG.
Reference numeral 1 is a control unit having a built-in register unit 1a. Reference numeral 2 denotes a key input section, and the key input section 2 has a stop key 2
a, playback key 2b, pause key 2c, "EDT" key 2
There are d, "S" key 2e, "E" key 2f, and "CLR" key 2g.

The "S" key 2e is a start key, and by pressing this "S" key 2e during normal reproduction, the start point (start point) of the portion to be edited and reproduced to be selected is designated. To do. The "E" key 2f is an end key, and by pressing this "E" key 2f during normal reproduction, the end point (end point) of the selected portion to be edited and reproduced is specified. By sequentially pressing the "S" key (hereinafter also referred to as the start key) 2e and the "E" key (hereinafter also referred to as the end key) 2f, a plurality of portions to be edited and reproduced are designated. "EDT" key 2
d is pressed when the portion to be edited and played back selected by the "S" key 2e and the "E" key 2f is continuously played back (that is, edited and played back). The "CLR" key 2g is a clear key, and is used to cancel a portion once selected.

The control unit 1 is designed to display a start point and an end point (time) at which the sound of the CD 3 is emitted on the display unit 4 in response to an instruction from the key operation unit 2. Further, when the CD 3 is mounted, the control unit 1 controls the focus and tracking servo circuit 7 to perform the focusing of the optical pickup 8 so that the TOC (Table 0) from the lead-in area on the innermost peripheral side of the CD 3 is controlled.
f Contents) Read information. The signal processing unit 11 is adapted to store TOC information supplied from the demodulation circuit 10 via the optical pickup 8 in a register (not shown) in the signal processing unit 11.

When the reproduction key 2b is pressed, the control unit 1
The motor 6 is driven via the motor drive servo circuit 5, whereby the CD 3 is rotationally driven. Further, at this time, the control unit 1 controls the focus and tracking servo circuit 7 to focus the optical pickup 8 and controls the feed servo circuit 9 to seek the optical pickup 8 at a position to be reproduced. The focus and tracking servo circuit 7 is controlled to perform fine tracking.

The demodulation circuit 10 demodulates the reproduction signal from the optical pickup 8 and outputs it to the signal processing unit 11. The signal processing unit 11 performs signal processing such as error correction on the demodulated reproduced signal and outputs it. Reference numeral 14 is a signal processing RAM that is connected to the signal processing unit 11 and is used during signal processing. Reference numeral 12 is an edit point storage RAM connected to the signal processing unit 11, and 13 is the signal processing unit 11.
The editing RAM, 15 connected to the A / D converter converts the reproduction signal from the signal processing unit 11 into a low-pass filter (LP).
F) An A / D converter that outputs the signal via the amplifier 16 and the amplifier 17. The control unit 1 and the signal processing unit 11 are connected so that signals can be exchanged between them. Also, RA for editing
M13 can store more data than a data amount (predetermined amount) for a time sufficient for the optical pickup 8 to move. During the editing and reproduction according to the present invention, the data from the CD 3 is reproduced in the RAM 13 at a speed higher than the normal speed (about twice the normal speed), so that the data for the time required for the movement of the optical pickup 8 is always stored. It has been secured.

Next, the edit point designation process will be described with reference to FIGS. Note that FIG. 2 is a diagram for explaining the editing point designation operation of FIG. 1, and FIGS. 3 and 4 are flowcharts showing the editing point designation processing in FIG.

When the reproduction key 2b is pressed, the control unit 1
"0" is assigned to the key discrimination flag F of the internal memory of the register unit 1a (step S1). Next, the control unit 1 drives the motor 6 via the motor drive servo circuit 5, and C
The rotation of D3 is started (step S2). And C
The reproduction output of D3 is from the optical pickup 8 to the demodulation circuit 10,
The signal is output to the outside via the signal processing unit 11, the A / D converter 15, the LPF 16, and the amplifier 17 (step S3).

Therefore, the operator presses the "S" key (start key) 2e at the start point S1 in FIG. 2A while listening to the music of the CD3 (steps S4, S).
5) Since the control section 1 has the key discrimination flag F = 0, the time data is stored in the register R0 of the register section 1a (step S7), and then the key discrimination flag F is set to "1" (step S8). .. Next, press the "E" key (end key) 2
When f is pressed at the endpoint E1 (step S
9, S4, S5, S10) (the first music piece in FIG. 2A is selected), the control unit 1 sets the key determination flag F to "1", so that the time data is registered in the register unit 1a. After storing in R1 (steps S11, S12),
The key determination flag F is set to "0" (step S13).
Then, the control unit 1 stores the time data of the registers R0 and R1 via the signal processing unit 11 in the edit point storage RAM 1
2 (step S14).

Similarly, while listening to the music, the "S" key 2e and the "E" key 2f are pressed at the start point S2 and the end point E2 of FIG. 2A, respectively, and then the start point S3 and the end point E3. By pressing with, the part of the third music in FIG. 2A is selected (steps S9, S4 to S14 are repeated).

Next, when the pause key 2c is pressed, the control unit 1 interrupts the reproduction, and the operator presses the reproduction key 2b to restart the reproduction from the beginning of the second music, whereby the reproduction is restarted (step S9). .. Similarly, the operator presses the "S" key 2e and the "E" key 2f at the start point S4 and the end point E4, as shown in FIG.
The second song is selected (steps S4 to S1)
4).

When the operator presses the stop key 2a (steps S9, S4, S5, S10, S1).
5), the control unit 1 stops the reproduction output of the CD 3 (step S17), and the motor 6 is driven via the motor drive servo circuit 5.
Is stopped (step S18).

In the present invention, the editing point storage RAM 12
2A is continuously edited and reproduced as shown in FIG. 2B based on the time data of the start point and the end point of FIG. 2A stored in FIG. It will be played continuously.

Next, FIG. 5 shows a time chart showing the operation of the signal processing section 11 of FIG. 5A is a clock signal indicating the timing of sending data from the signal processing unit 11 to the editing RAM 13, and FIG. 5B is a signal processing unit 11.
Data sent from the editing RAM 13 to the editing RAM 13 at the timing of FIG. 5A, FIG. 5C is a read clock of the editing RAM 13, and FIG. 5D is for editing at the timing of FIG. 5C. This is the data read from the RAM 13.
The clock signal is generated inside the control unit 1.

Next, the operation of editing and reproducing as shown in FIG. 2B will be described with reference to FIGS. 1 and 6 to 9. Here, the operation will be described mainly with reference to FIGS. 7 to 9. In addition,
FIG. 6 is a diagram showing a state of the editing RAM 13 during editing and reproduction,
7 to 9 are flowcharts showing the editing / reproducing process of FIG. In FIG. 6, w represents a writing position, r represents a reading position, and a slanted line represents unread data.

First, when the "EDT" key 2d is pressed, the control section 1 sets the read flag RF of the built-in memory to "0".
Is substituted (step S21). Here, the read flag RF is a flag indicating whether or not the editing RAM 13 is being read. At the start of editing when the "EDT" key 2d is pressed, nothing is stored in the editing RAM 13 (FIG. 6 (a)). The control unit 1 is a motor drive servo circuit 5
The motor 6 is driven via to start the rotation of the CD 3 (step S22).

Next, the control unit 1 controls the signal processing unit 11,
The signal processing unit 11 is caused to read the data of the start point S1 at the selected position in FIG. 2 from the editing point storage RAM 12, and then the data of the end point E1 thereof (steps S23 to S25). And the control unit 1
Causes the optical pickup 8 to focus through the focus and tracking servo circuit 7, then seeks the optical pickup 8 through the feed servo circuit 9, and further the focus and tracking servo circuit 7
To perform fine tracking (step S26).

Next, the optical pickup 8 starts reading the data of the CD 3 (step S27), and supplies the reproduction signal to the signal processing section 11 via the demodulation circuit 10. When the signal processing unit 11 detects the data of the start point S1 from the reproduction signal from the demodulation circuit 10 (step S28), the control unit 1 causes the signal processing unit 11 to write 8 bits of audio data to the editing RAM 13 and to store the RAM 13 in the RAM 13. Fill it (repeat steps S29 to S31, FIG.
(B)). Next, the control unit 1 causes the signal processing unit 11 to have the RAM
Writing is temporarily stopped, and the optical pickup 8 is controlled to temporarily stop reading the CD data (step S32). At this time, CD3 continues to rotate.

Since the read flag RF is "0", the control unit 1 starts the generation of the read clock and sets the read flag RF to "1" (steps S33 to S35). Under the control of the control unit 1, the signal processing unit 11 temporarily suspends the processing of the flowcharts of FIGS. 7 and 8 every time a read clock is generated, and executes the processing of the flowchart of FIG. 9. That is, RA at the timing of the read clock
Data is read from M13 by 8 bits at a time (step S51 in FIG. 9, FIG. 6B). After that, the signal processing unit 11
Data is read from the AM 13 at a constant speed. The signal processing unit 11 then reads the read data (see FIG.
(D)) is A / D converter 15, LPF 16, amplifier 17
To the outside via.

When the remaining data in the RAM 13 becomes less than or equal to a predetermined amount (step S36), the signal processing section 11 starts reading the data of the CD 3 and writing the data in the RAM 13 (step S37, FIG. 6C). )).
Here, the "predetermined amount" means data for a time sufficient for the optical pickup 8 to move, and here, the RAM 1
The capacity of 3 is 256 kB, and the above-mentioned predetermined amount is 176 kB. Note that 176 kB is audio data corresponding to about 1 second (here, the moving time of the optical pickup 8 is 1
I think it is within seconds. ).

Here, since the reproduction of the CD is performed at a speed higher than usual (about twice the normal speed),
The RAM 13 will be filled with unread data again. Therefore, under the control of the control unit 1, the signal processing unit 11 writes 8 bits of audio data into the RAM 13, and when the RAM 13 becomes full (steps S29-).
Repeating S31, FIG. 6 (d), the writing to the RAM 13 and the reading of the CD data are stopped (step S).
32). As a result of the reading of the RAM 13 by the signal processing unit 11 (step S51 in FIG. 9), if the remaining data in the RAM 13 becomes below a predetermined amount again (steps S33, S3
6, FIG. 6 (e)), the CD data reading and the writing to the RAM 13 are started in the same manner as described above (step S37).

Under the control of the control unit 1, the signal processing unit 11 writes 8 bits of audio data from the demodulation circuit 10 into the RAM 13 (repeat steps S29 to S31, S29, FIG. 6 (f)). The control unit 1 is a signal processing unit 1
1 detects the data of the end point E1 at the selected position in FIG. 2 from the reproduction signal from the demodulation circuit 10, the CD
The reading of data is stopped and the signal processing unit 11 receives R
Writing to the AM 13 is stopped (step S30,
S38, FIG. 6 (g)). The reading from the RAM 13 is continued at a constant speed as shown in FIGS. 6 (g) and 6 (h).

Next, the control unit 1 controls the signal processing unit 11 to cause the signal processing unit 11 to start the start point S2 at the selected position in FIG.
The data of the end point E2 is read (step S2
3 to S25), the optical pickup 8 is moved in the same manner as described above (step S26). Next, the control unit 1 starts the reading of the CD data and the writing to the RAM 13 by the signal processing unit 11 (step S27, FIG. 6).
(H)).

When the signal processing unit 11 detects the data of the start point S2 from the reproduction signal from the demodulation circuit 10 under the control of the control unit 1 (step S28), it corresponds to 8 bits of audio data from the demodulation circuit 10. RAM for each
13 (repeating steps S29 to S31).
The control unit 1 stops reading the CD data and writing the data to the RAM 13 by the signal processing unit 11 when the RAM 13 is full (when there is no write space) (step S32, FIG. 6 (i)).

Then, the control unit 1 determines that the remaining data in the RAM 13 is below a predetermined amount (steps S33, S3).
6, FIG. 6 (j)), reading of CD data and writing to the RAM 13 by the signal processing unit 11 are started (step S37). As described above, the data is constantly read from the RAM 13 at a constant speed, and the read data is transferred from the signal processing unit 11 to the A / D converter 15 and L.
It is output to the outside via the PF 16 and the amplifier 17.
Under the control of the control unit 1, the signal processing unit 11 writes 8-bit audio data of the CD data read from the demodulation circuit 10 into the RAM 13 (steps S29 to S29).
31 is repeated, S29). The control unit 1 includes a signal processing unit 11
When detects the data of the end point E2, the reading of the CD data is stopped (step S38).

Below, the selected portion to be reproduced in FIG.
Is similarly performed (steps S23 to S28,
Repeat S29 to S31, S32, S33, S36, S
37, repetition of S29 to S31, S29, S38).

When the above operation is completed, the selected portion of FIG. 2 to be continuously reproduced next disappears, so that the data of the next start point is not read from the RAM 12 (steps S23 and S24). The control unit 1 stops the writing to the RAM 13 and the reading of the CD by the signal processing unit 11 (FIG. 6 (k)). Further, the control unit 1 stops the rotation of the motor 6 via the motor drive servo circuit 5 (step S39). However, the signal processing unit 11 continues to read data from the RAM 13 (step S5 in FIG. 9).
1). The signal processing unit 11 uses the read data (see FIG. 5).
(D)) is A / D converter 15, LPF 16, amplifier 17
To the outside via.

When there is no data to be read from the RAM 13 (step S40, FIG. 6 (m)), the control section 1 does not read flag RF = 0 (that is, if the RAM 13 is reading) (step S41). The generation of the read clock is stopped (step S42).

As described above, the portion to be reproduced selected from the CD3 is edited RAM as shown in FIG. 2B.
13 can be used for continuous editing and continuous reproduction.

The present invention is not limited to this embodiment, and various applications and modifications are conceivable without departing from the gist of the present invention. The recording medium reproducing apparatus of the present invention is not limited to a CD player, but may be a DCC (Digital).
Compact Cassette), MD (Mini)
Disk), DAT (Digital AudioT)
ape), analog compact cassettes, and other playback devices.

[0038]

As described above, according to the recording medium reproducing apparatus of the present invention, a plurality of locations on the recording medium are arbitrarily selected by the designating means, and the selected plurality of locations are selected according to one's preference. Since the data is edited by using the second storage means and the output means reads the data such as the music edited according to the user's preference from the second storage means and outputs the data at a constant speed, no breaks are produced in the sound. In addition, it is possible to continuously reproduce a plurality of selected locations on the recording medium.

[Brief description of drawings]

FIG. 1 is a block configuration diagram showing an embodiment of a CD player of the present invention.

FIG. 2 is a diagram illustrating an operation of designating an edit point in FIG.

FIG. 3 is a flowchart showing an edit point designation process in FIG.

FIG. 4 is a flowchart following FIG.

5 is a time chart showing the operation of the signal processing unit 11 of FIG.

FIG. 6 is a diagram showing a state of an editing RAM 13 during editing and reproduction.

FIG. 7 is a flowchart showing the editing / reproducing process of FIG.

8 is a flowchart following FIG. 7.

9 is a flowchart showing the editing / playback processing of FIG.

[Explanation of symbols]

 1 control section 2 key input section 3 CD 5 motor drive servo circuit 6 motor 7 focus and tracking servo circuit 8 optical pickup 9 feed servo circuit 10 demodulation circuit 11 signal processing circuit 12 edit point storage RAM 13 edit RAM

Claims (1)

[Claims] 1. A designation means for designating positions of a plurality of locations on a recording medium, a first storage means for storing the location of each location designated by the designation means, and the first storage means for a recording medium. Reproducing means for sequentially reproducing the portion corresponding to the position of each designated location stored in the above, and outputting a reproduced signal; second storage means for storing the reproduced signal output from the reproducing means as reproduced data; Output means for reading the reproduction data from the second storage means and sending it as an output signal at a constant speed; and the reproduction means finishes the reproduction of one of the designated portions on the recording medium and starts the reproduction of the other designated portion. The recording medium reproducing apparatus, further comprising: a control unit that controls the output unit so that an output signal is transmitted from the output unit at a constant speed.