JPH0955012A - Disk reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk reproducing device for automatically adjusting a reproduction starting position according to a stop position even when the device is temporarily stopped during reproducing a recorded content from a disk recording carrier by determining whether the stop position of a pickup is within a predetermined recovery range from the starting part of the recorded content being reproduced or not. SOLUTION: When a reproducing key 21 is operated again after the reproducing operation of a compact disk(CD) 11 is stopped by operating a stop key 22, a control part 20 determines whether or not a stop position is smaller than a recovery position equivalent to a time represented by a particular ratio against the length of music when this is represented by the passage of time from the starting position of one piece of music recorded in the CD 11. When a condition is satisfied, the starting position of the music is searched and an optical pickup 15 is returned to the starting position. Thus, even when the device is temporarily stopped during music reproducing from the CD 11, a reproduction starting position is automatically adjusted according to the stop position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc reproducing apparatus for reading recorded contents from a disc-shaped record carrier such as a compact disc (hereinafter abbreviated as "CD").

[0002]

2. Description of the Related Art CDs are widely used mainly for reproducing music, and are often equipped with a CD player or the like which is a reproducing device for a CD of an audio device mounted on a vehicle.
In a car-mounted CD player, the power supply may be cut off during playback to turn off the power or the source to be played may be suddenly switched to a tuner or the like to stop playing the CD midway due to the traveling of the vehicle. is there.

FIG. 6 shows an area where the data recorded on the CD 1 exists. Center hole 2 in the center of CD1
Is provided, is inserted into the rotary shaft of the spindle motor and is rotationally driven, and the information recorded in the program area 3 is optically read. A lead-in zone 4 is provided on the inner peripheral side of the program area 3, and a lead-out zone 5 is provided on the outer peripheral side. Lead-in zone 4
In this area, information that serves as an index of the content previously recorded in the program area 3 is recorded. For example, when a plurality of musical pieces are recorded in the program area 3, the lead-in zone 4 is provided with a TOC (Table Of Contents) area indicating the start position and length of each musical piece. According to the information, the optical pickup can be quickly moved to the recording position of the specific musical piece, and the content of the musical piece can be read and reproduced.

[0004] A car-mounted CD player or the like needs an operation of temporarily stopping during reproduction and restarting reproduction. In the conventional CD player, when the reproduction is started again, the reproduction is performed from the same position where the reproduction is stopped or the beginning of the music being reproduced. When reproducing from the same position where it stopped, the position of the optical pickup is not moved until the reproduction is restarted. When reproducing from the beginning of the music being reproduced, the TOC information is referred to, the optical pickup is returned to the beginning position of the music, and then the reproduction is started.

Japanese Unexamined Patent Publication No. 3-252959 discloses a prior art in which when a CD stored in a plurality of magazines is sequentially played back, the next CD is played after the performance is temporarily stopped to avoid repeating the same CD. Is disclosed. Japanese Patent Laid-Open No. 5-15
9441 discloses a prior art in which, in an optical disk device capable of recording / reproducing, when information is stopped in the middle of reading, the next time information is read, the reading is started from the stopped position. Further, Japanese Utility Model Laid-Open No. 62-187471 discloses a prior art related to muting at the time of temporarily stopping reproduction as a pause operation.

[0006]

[Patent Document 1] Japanese Laid-Open Patent Publication No. 5-15
When the playback is configured to start from the stop position as in the prior art of 9441, even if the playback is performed after playing the vicinity of the beginning of the song for a few seconds and then the playback is continued, It will be played. However,
In such a case, it is often forgotten how far you were listening while switching to another program source, and it is often the case that you want to listen again from the beginning.

Further, in the structure in which the optical pickup is always returned to the head position and the reproduction is started, the reproduction is restarted from the head position even after reproducing most of the portion, and the portion not yet heard. It takes longer to play.

An object of the present invention is to provide a disc reproducing apparatus in which the position for starting the reproduction is automatically adjusted according to the stop position even if the recorded contents are temporarily stopped during reproduction from the disc-shaped record carrier. .

[0009]

DISCLOSURE OF THE INVENTION The present invention relates to a disc reproducing apparatus for sequentially reading and reproducing recorded contents while moving the pickup relative to the disc-shaped record carrier, and the relative movement of the pickup to the disc-shaped record carrier. Position detecting means for detecting a desired position, a position storing means for storing the relative position of the pickup as a stop position in response to an output from the position detecting means when the reproduction is stopped, and a reproduction start after the reproduction is stopped. By referring to the position storage means, it is determined whether or not the stop position of the pickup is within a predetermined return range from the head position of the recorded content being reproduced at the time of reproduction, and if it is within the return range, the pickup is returned. The disk reproducing apparatus is characterized by including a control means for controlling the reproduction to start from the head position. According to the present invention, when the recorded content is read from the disc-shaped record carrier and is reproduced, when the recording is temporarily stopped and the reproduction is started, the stop position for the recorded content is within a predetermined return range from the head position. If so, the pickup is returned to the beginning position and playback is started. When the recorded content is being played for only a short time, playback is restarted from the beginning after stop, so there is no need to manually instruct the operation to listen to the song from the beginning. Playback starts from the beginning position.

Further, in the present invention, the disc-shaped record carrier has a content recording area in which information including a recording position and a length of recorded content is recorded in advance, and the control means includes the content recording area and the position. It is characterized in that, by referring to the storage means, whether or not the stop position of the pickup is within the return range is determined by the ratio from the start position of the recorded content to the stopped position with respect to the length of the recorded content. According to the present invention, it is determined whether or not the stop position is within the recovery range based on the ratio from the start position of the recorded content, so that even if the length of the recorded content varies, the recovery range can be easily handled. It can be determined whether or not.

Further, when it is judged that the stop position of the pickup is not within the return range, the control means of the present invention refers to the content recording area and controls the reproduction to be started from the head position of the next recorded content. It is characterized by According to the present invention, depending on whether or not the stop position of the pickup is within the return range, reproduction is performed from the head position of the recorded content being reproduced or the head position of the next recorded content. In the state where the content is reproduced, the next recorded content is immediately reproduced. In the latter half of the recorded contents, less important information may be recorded, and in such a case, it is preferable to immediately reproduce the next recorded contents.

Further, when the control means of the present invention judges that the stop position of the pickup is not within the return range, whether or not the stop position of the pickup is within a predetermined continuation range farther from the leading position than the return range. Is judged from the ratio from the beginning position of the recorded contents to the stop position with respect to the length of the recorded contents, and if it is within the continuous range, playback is started from the stopped position, and if it is judged not to be within the continuous range, It is characterized in that control is performed so that reproduction is started from the head position of the next recorded content with reference to the recording area. According to the present invention, when the stop position of the pickup is within the return range or the continuation range farther from the start position than the return range, the reproduction is started from the start position or stop position, respectively, and farther from the start position than the continuation range. When stopped at the position, the next recorded content is reproduced. The playback start position is automatically selected according to the stop position, so if the stop position is played from the beginning of the song at the beginning of the song at restart, or if the stop position is immediately before the end of the song, Since it proceeds to the song, it is not necessary to manually listen to the song.

Further, the control means of the present invention is controlled so as not to perform reproduction from the start position when the reproduction time from the start position to the stop position of the recorded content being reproduced exceeds a predetermined time. And According to the present invention, when the reproduction time from the start position to the stop position exceeds a predetermined time, the reproduction from the start position is not performed.
Even if the total playback time of the recorded content is large and the percentage is small, after playing for a sufficient time, it is possible to continue playback without repeating the playback again from the beginning, and the same portion for a long time. You can prevent things like playing.

[0014]

1 shows a schematic electrical configuration of a CD reproducing apparatus 10 according to an embodiment of the present invention. C
D11 is mounted on the rotary shaft of the spindle motor 13 by the clamp mechanism 12 and is rotationally driven. The rotation speed of the spindle motor 13 is servo-controlled by the rotation servo circuit 14. The information recorded on CD11 is
It is detected by the optical pickup 15. Focus control of the optical pickup 15 is performed by a focus servo circuit 16. Tracking control for moving the optical pickup 15 in the radial direction of the CD 11 is performed by a tracking servo circuit 17.

A control circuit 20 realized by a microcomputer or the like performs access control for moving the optical pickup 15 relative to the CD 11 via a tracking servo circuit 17. The control circuit 20 includes a playback key 2
1, the input from the stop key 22, etc.
With reference to step 3, the preset operation is performed. The control circuit 20 includes a sub-coding detection circuit 24.
The sub-coding information in the recorded content of the CD 11 detected by is input. Sub coding detection circuit 2
4 includes an optical pickup 1 from the digital signal processing circuit 25.
The data detected by 5 is input. This signal is converted into a pulse waveform under a certain condition by the analog waveform shaping circuit 26, the synchronization signal is detected by the synchronization detection circuit 27, and the clock signal for timing is generated by the PLL circuit 28. The output from the digital signal processing circuit 25 is converted from a digital signal to an analog signal by the D / A circuit 29, and further, an Lch and Rch audio stereo output is obtained through a filter. A setting key 30 such as a range is also connected to the control circuit 20,
It is possible to set a range that determines how to move the optical pickup 15 at the time of the next reproduction according to the reproduction stop position of the CD 11 by the optical pickup 15.

FIG. 2 shows the operation of the control circuit 20 of FIG. The operation is started from step a1, and it is determined in step a2 whether or not the reproduction operation is restarted. For example, when the reproduction key 21 is operated again while the reproduction operation of the CD 11 is stopped by operating the stop key 22, the reproduction operation is restarted, and the process proceeds to step a3. At step a3, is the stop position smaller than the return position corresponding to the time indicated by a specific ratio to the length of the music when expressed by the elapsed time from the beginning position of one music recorded on the CD 11? Determine whether or not. If the condition is satisfied, the process moves to step a4 to search the beginning of the music and return the optical pickup 15 to the beginning position. If the condition is not satisfied in step a3, the process proceeds to step a5, and it is determined whether or not the continuous position corresponding to the time indicated by a specific ratio with respect to the entire length of the tune is exceeded. If it does not exceed the limit, it is judged to be within the continuation range, and in step a6, a stop position search for holding the optical pickup 15 at the stop position recorded in the memory 23 is performed. When the condition is satisfied in step a5, the process moves to step a7 to search the beginning position of the next performance music and move the optical pickup 15. When the operation of step a4, step a6 or step a7 ends, the reproduction operation starts in step a8 and thereafter.

FIG. 3 shows the relationship between the return range and the continuation range with respect to the song 40 being reproduced recorded on the CD 11, and the horizontal axis corresponds to the track direction. The return range 42 and the continuation range 43 are continuously taken from the head position 41 of the music 40 being reproduced, and in the range behind the continuation range 43, the reproduction is started from the head position of the next music 44. When the condition is satisfied in step a3 of FIG. 2, the stop position 45 exists within the return range 42 from the start position 41 to the return position 47, as shown in FIG. 3 (1). When the condition of step a5 of FIG. 2 is not satisfied (2), the stop position 45 is the return position 4
It exists in the continuation range 43 from 7 to the continuation position 48.
When the condition of step a5 is satisfied, as shown in FIG. 3 (3), the vehicle stops after the continuation position 48 and stops at the stop position 45.
Is a position farther from the leading position 41 than the continuation range 43.

If the continuation range 43 is not provided and the position is outside the return range 42, the reproduction is started from the stop position as shown in step a6, or the start position of the next music piece 44 as shown in step a7. You can also start playback from.

FIG. 4 shows an operation according to another embodiment of the present invention. Also in this embodiment, the hardware basically requires the same configuration as that of FIG. The operation starts from step b1 and waits for the reproduction operation to be restarted in step b2. In step b3, it is determined whether the stop position is closer to the start position than the return position corresponding to the time indicated by the relative time ratio. If the condition is not satisfied, the process moves to step b4 and a search for starting reproduction from the stop position is performed. When the condition is satisfied in step b3, the process proceeds to step b5, and it is determined whether the time for reproducing from the start position to the stop position is shorter than a specific time set in advance. If the condition is not satisfied, the process moves to step b6 to perform a stop position search to prepare for reproduction from the stop position. When the condition is satisfied in step b5, the process moves to step b7, and the reproduction start from the music start position is performed by the music start search. When the operations of step b4, step b6, and step b7 are completed, the reproduction operation after step b8 is started.

FIG. 5 shows the relationship between the stop position and the time for judging, and the portions corresponding to those in FIG. 3 are designated by the same reference numerals.
FIG. 5A shows the case where the condition of step b3 of FIG. 4 is not satisfied. Since the stop position 45 is outside the return range 42 of the music 40 being reproduced, the reproduction from the stop position 45 is performed. As shown in FIG. 5B, when the stop position 45 is within the return range 42 and the reproduction time from the start position is less than the specific time 49 set in advance, the optical pickup is performed at the start position 41 in step b7. The beginning search of the music for moving to is performed. As shown in FIG. 5C, step b
5 is not satisfied, that is, the stop position 45 is
If it is within the return range 42 but in a region farther from the head position 41 than the specific time 49, step b6
At, a stop position search is performed, and preparations are made to restart playback from the stop position.

In each of the above embodiments, the CD 11 is used as a disk-shaped record carrier, but other optical disks such as a mini disk (abbreviated as "MD") and a video disk (abbreviated as "VD") can be handled in the same manner. be able to. Further, the disc-shaped record carrier is not limited to an optical disc, but can be applied to a magnetic record carrier such as a floppy disc or a hard disc.

[0022]

As described above, according to the present invention, when the reproduction is stopped while the pickup is relatively moved from the disc-shaped record carrier to sequentially read the recorded contents, the stop position is the recorded contents. Within the predetermined return range from the start position of the, the control can be performed so that the reproduction is started from the start position when the reproduction is next started. Thus, for example, when the reproduction is resumed from a beginning position when the reproduction is restarted again after the reproduction is stopped for a short time. As a result, even if you have forgotten how far you have listened to and want to play it again from the beginning, it is automatically played from the beginning position without any further operation.

Further, according to the present invention, whether or not it is within the recovery range is judged by the ratio of the length from the start position to the stop position with respect to the length of the recorded contents, so that it depends on the difference in the length of the recorded contents. Instead, it is possible to easily determine whether or not to reproduce from the beginning position.

Further, according to the present invention, when it is determined that the stop position is not within the return range, the reproduction can be started from the head position of the next recorded content. When playing music, it is preferable to play from the beginning position in time series, so it is preferable to play from the beginning position of the next playing song rather than playing only the second half of the playing song. Can be done.

According to the present invention, when it is determined that the pickup is within the predetermined continuation range at the stop position during reproduction, the reproduction is started from the stop position. If the vehicle is stopped within the return range closer to the start position than the continuous range,
Return to the beginning position and start playback. When stopped outside the continuation range, reproduction is started from the beginning position of the next recorded content. The playback start position is selected according to the stop position in one performance song, and the stop position is played from the beginning of the performance song at restart at the beginning of the performance song, and the stop position is immediately before the end of the performance song. In this case, since the reproduction is started from the head position of the next music piece, it is not necessary to manually perform the operation of listening to the music piece again.

Further, according to the present invention, when stopped for a predetermined time, the head position is not returned even if the ratio is small. Therefore, it is possible to avoid repetitive reproduction after some reproduction. it can.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic electrical configuration of a CD reproducing device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of the control circuit of FIG.

FIG. 3 is a diagram showing a relationship between a stop position corresponding to the operation of FIG. 2 and a music piece being reproduced or a next music piece.

FIG. 4 is a flowchart showing an operation according to another embodiment of the present invention.

5 is a diagram showing a relationship of music pieces to a stop position and a reproduction position corresponding to the operation of FIG.

FIG. 6 is a schematic plan view showing a data recording area of a CD.

[Explanation of symbols]

 10 CD playback device 11 CD 15 optical pickup 20 control circuit 21 playback key 22 stop key 23 memory 24 sub-coating detection circuit 25 digital signal processing circuit 30 setting key 40 song being played 41 start position 42 return range 43 continuation range 44 next Song 45 Stop position 49 Specific time

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Chisui Horii 1-2-2 Goshodori, Hyogo-ku, Kobe, Hyogo Prefecture Within Fujitsu Ten Limited

Claims (5)

[Claims] 1. A position detecting device for detecting a relative position of a pickup with respect to a disc-shaped record carrier in a disc reproducing device for sequentially reading and reproducing recorded contents while moving the pickup relative to the disc-shaped record carrier. Means for storing the relative position of the pickup as a stop position in response to the output from the position detection means when the reproduction is stopped, and the position storage means when the reproduction is started after the reproduction is stopped. It is judged whether or not the stop position of is within a predetermined return range from the start position of the recorded content being reproduced at the time of reproduction, and if it is within the return range, the pickup is returned and the reproduction is started from the start position. And a control means for controlling the disc. 2. The disc-shaped record carrier has a content recording area in which information including a recording position and a length of recorded content is recorded in advance, and the control means includes the content recording area and the position storage means. 2. The disc according to claim 1, further comprising: determining whether or not the stop position of the pickup is within the return range, based on the ratio from the start position of the recorded content to the stopped position with respect to the length of the recorded content. Playback device. 3. The control means, when determining that the stop position of the pickup is not within the return range, controls the content recording area to start reproduction from the head position of the next recorded content. The disk reproducing apparatus according to claim 2, wherein the disk reproducing apparatus is a disk reproducing apparatus. 4. The control means, when determining that the stop position of the pickup is not within the return range, determines whether the stop position of the pickup is within a predetermined continuation range farther from the leading position than the return range. , Judging from the ratio from the start position of the recorded contents to the stop position with respect to the length of the recorded contents, if it is within the continuous range, playback is started from the stopped position, and if it is judged not to be within the continuous range 3. The disc reproducing apparatus according to claim 2, wherein the disc reproducing apparatus is controlled so as to start reproducing from the head position of the next recorded content with reference to. 5. The control means controls so as not to perform reproduction from the start position when the reproduction time from the start position to the stop position of the recorded content being reproduced exceeds a predetermined time. The disk reproducing device according to claim 1.