JP2004071022A - Optical disk player - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk player capable of keep playing by quickly and surely transferring a pickup to a desired fast forward position or a fast rewind position while preventing occurrence of errors at the time of performing a fast forwarding or a fast rewinding when playing data back. <P>SOLUTION: When a fast forward button FF or a fast rewind button FR is pushed when playing back the data stored in an optical disk 1, a pickup 2 is stopped and a period when the button FF or the button FR is pushed is measured. Then, when the button FF or the button FR is released, the position of the position of a fast forward destination or the position of a fast rewind destination is calculated based on the measure period and after the pickup 2 is transferred to the calculated position at speed faster than that in a playing time, the data are played back by reading the data stored on the optical disk 1 with the pickup 2. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an optical disk reproducing apparatus for reproducing data stored on an optical disk such as a CD and a DVD, and more particularly, to a control for moving a pickup when performing fast forward or fast reverse during data reproduction.
[0002]
[Prior art]
An optical disk reproducing device irradiates a light beam projected from a pickup onto an optical disk and reads and reproduces data such as sound and images recorded on the optical disk from the reflected light, and is used for a CD player or a DVD player. Widely used for such AV equipment. Such an optical disk reproducing apparatus has functions such as focus control for controlling the movement of the pickup in the vertical direction with respect to the disk surface so that a light beam spot is formed on the disk in a focused state.
[0003]
Further, the optical disc reproducing apparatus is provided with a play button, a stop button, a fast forward button, and a fast rewind button. When the play button is pressed, the data is read while the pickup moves at a predetermined speed, and the read data is reproduced. When the stop button is pressed, the pickup stops moving and data reading, and data reproduction is stopped. When the fast-forward button is pressed, the pickup moves in the fast-forward direction at a faster speed than during playback, and fast-forward of data to be played is performed. When the fast-reverse button is pressed, the pickup moves in the fast-reverse direction at a speed faster than that at the time of the reproduction, and the data to be reproduced is rapidly rewinded. When the fast forward button or fast reverse button is pressed during data playback, the data is read while the pickup moves in the fast forward direction or fast reverse direction at a faster speed than during playback while these buttons are pressed. The read data is reproduced at a higher speed than at the time of reproduction. The control of the pickup at the time of fast forward or fast reverse is described in, for example, Japanese Patent Application Laid-Open No. 8-32165.
[0004]
[Problems to be solved by the invention]
By the way, in the above-mentioned optical disc reproducing apparatus, since focus control is performed, if there is a flaw, dirt, dust, etc. on the optical disc, the laser beam detects the flaw, etc., and the data itself cannot be read normally. A reading error may occur or a data error may occur in which the read data becomes unreproducible data. In particular, when performing a fast forward or a fast reverse during data reproduction, if a reading error or a data error occurs, the optical disk reproducing device malfunctions and stops the pickup, and the data reproduction is not sustained.
[0005]
This will be specifically described with reference to FIG. FIG. 6 is a diagram for explaining the operation of the pickup P when performing fast forward or fast reverse during data reproduction. In FIG. 6A, when the fast forward button or the fast reverse button is pressed during reading and reading the data of the optical disc D while the pickup P is moving, the pickup P moves from the position X1 where the button was pressed to the fast forward direction or fast forward. The data is read while moving in the return direction at a speed higher than that at the time of reproduction. At this time, the read data is reproduced at a higher speed than during reproduction. Then, as shown in FIG. 6B, when the pickup P reaches a point where the flaw K is present on the optical disc D, the pickup P reads the data at this point, but the read data cannot be reproduced due to the flaw K. It becomes data and a data error occurs. For this reason, the optical disk reproducing apparatus malfunctions due to this error, and stops at the point where the scratch K exists without moving the pickup P to the fast forward destination or the fast reverse destination X2 as shown in FIG. 6C. Would. As a result, fast forward or fast reverse of the data is stopped, and the reproduction of the data is not maintained.
[0006]
Japanese Patent Application Laid-Open No. 11-144399 discloses that during normal data reproduction, data is read by a pickup twice, that is, pre-reading and main reading, and when a data reading error is detected during pre-reading, data can be read during main reading. A method has been proposed in which reading is retried until a data error is detected during pre-reading, and this data is skipped during main reading to reproduce the next data, thereby continuing reproduction without stopping pickup. However, if this method is applied to fast-forward or fast-reverse during data playback, pre-reading is always performed before actual reading to detect errors in advance, so it takes time to read data, and Since a read retry or the like is performed at the time of main reading for the detected error, it takes time to deal with the error, and there is a problem that the fast-forward or fast-return processing of data is delayed.
[0007]
An object of the present invention is to solve the above-described problems. An object of the present invention is to provide a fast-forward or fast-rewind during data reproduction by preventing an error from occurring before moving a pickup to a desired fast-forward destination. Another object of the present invention is to provide an optical disk reproducing apparatus that can quickly and surely move to a fast-return destination position and maintain reproduction.
[0008]
[Means for Solving the Problems]
The optical disk reproducing apparatus according to the present invention stops the pickup when the fast forward button or the fast reverse button is pressed during data reproduction, and measures the time while the button is pressed. When the button is released, the position of the fast forward destination or the position of the fast rewind destination is calculated based on the measured time, the pickup is moved to the calculated position at a speed higher than that at the time of reproduction, and then the data is picked up. To read and play.
[0009]
In this way, the data is not read when the pickup is moved to the position of the fast forward destination or the fast rewind destination, and the data is read after the pickup is moved. Even if there is a flaw or dirt on the optical disk, the reading is skipped and the occurrence of a reading error that prevents the data itself from being read normally or a data error that causes the read data to become unreproducible data is prevented. Can be prevented. For this reason, as described in Japanese Patent Application Laid-Open No. H11-144399, countermeasures against errors such as pre-reading of data to detect an error in advance, retry of reading, and reproduction of next data by skipping error data are performed. This eliminates the need, and allows the pickup to be quickly and reliably moved to a desired fast-forwarding or fast-rewinding destination, thereby continuing playback.
[0010]
Also, in the present invention, when the fast-forward button or the fast-reverse button is pressed during data reproduction, pseudo data for recognizing that the user is performing fast-forward or fast-reverse is reproduced, and the button is pressed. When released, reproduction of the pseudo data may be stopped.
[0011]
If the pickup stops reading data while the fast forward button or the fast reverse button is pressed, the data is not reproduced during this time, and no sound or image based on the data is output. However, since the sound or image based on the pseudo data is output by reproducing the pseudo data as described above, the user must fast-forward or fast-rewind from the sound or image. And the user does not feel uneasy about the operation of the optical disk reproducing apparatus.
[0012]
In the present invention, seek sound data for outputting a seek sound as pseudo data and seek image data for outputting a seek image are reproduced. The seek sound or seek image is a sound or an image output when sound data or image data stored on an optical disc is read and reproduced by a pickup at a higher speed than during reproduction.
[0013]
By doing so, a seek sound or a seek image is output, so that the user can clearly recognize that fast forward or fast reverse is performed during data reproduction from the seek sound or the seek image.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a block diagram showing an electrical configuration of an optical disc reproducing apparatus 100 according to the present invention. In FIG. 1, reference numeral 1 denotes an optical disk formed of a CD storing music data, for example. A pickup 2 irradiates the optical disc 1 with a light beam and receives the reflected light to read the data of the optical disc 1. Reference numeral 3 denotes a pickup drive circuit for driving a laser diode for irradiating a light beam provided in the pickup 2 and moving the pickup 2 in the radial direction of the optical disc 1. Reference numeral 4 denotes a disk motor for rotating the optical disk 1, and reference numeral 5 denotes a motor drive circuit for driving the disk motor 4. Reference numeral 6 denotes a signal processing unit that generates a reproduction signal based on data read by the pickup 2. The generated reproduction signal is output as sound from a speaker, a television, or the like. Reference numeral 7 denotes a servo circuit that performs focus control and tracking control of the pickup 2. Reference numeral 8 denotes a controller composed of a microprocessor for controlling each unit, and has a built-in counter 8a. The controller 8 constitutes the stopping means, the measuring means, the calculating means, the moving means, and the reproduction starting means in the present invention. Reference numeral 9 denotes a storage unit including a memory such as a ROM and a RAM.
[0015]
Reference numeral 10 denotes a display unit provided on the front panel, which displays data reproduction time, data number, and the like. An operation unit 11 is also provided on the front panel, and includes a play button PL, a stop button ST, a fast-forward button FF, and a fast-return button FR. When the play button PL is pressed, the data of the optical disc 1 is read while the pickup 2 moves at a predetermined speed, and the read data is reproduced. When the stop button ST is pressed, the pickup 2 stops moving and reading data. When the fast-forward button FF is pressed, the pickup 2 moves in the fast-forward direction at a speed higher than that at the time of reproduction, and the data to be reproduced is fast-forwarded. When the fast-reverse button FR is pressed, the pickup 2 moves in the fast-reverse direction at a speed higher than that at the time of reproduction, and the data to be reproduced is rapidly rewinded. When the fast forward button FF or the fast reverse button FR is pressed during data reproduction, the fast forward destination or fast reverse of the pickup 2 is performed based on the time during which these buttons FF and FR are pressed, as described later. When the previous position is calculated and the buttons FF and FR are released, the pickup 2 moves to the calculated fast-forward destination or fast-rewind destination at a faster speed than during reproduction, and the data reproduction after the movement is started. Is done.
[0016]
FIG. 2 is a diagram for explaining the operation of the pickup 2 when performing fast forward or fast reverse during data reproduction. In FIG. 2, K is a scratch on the optical disc 1. P1 indicates the position of the pickup 2 when the fast-forward button FF or the fast-return button FR is pressed during data reproduction, and P2 indicates the position of the fast-forward or fast-rewind destination where the pickup 2 is moved. In FIG. 2A, when the fast-forward button FF or the fast-return button FR is pressed during reading and data reading of the optical disc 1 while the pickup 2 moves, as shown in FIG. The movement and reading are stopped at the position P1 where the buttons FF and FR are pressed. At this time, the time during which the buttons FF and FR are pressed is measured by the counter 8a of the controller 8. When the buttons FF and FR are released, the position P2 of the fast forward destination or the fast reverse destination is calculated by the controller 8 from the measured time, and as shown in FIG. And moves to a position P2 calculated at a speed faster than that at the time of reproduction. In this process, since the pickup 2 is displaced in a direction away from the optical disc 1, the light beam from the pickup 2 does not form a focal point on the optical disc 1, and thus the flaw K is not read. Then, when the pickup 2 comes to the position P2, the pickup 2 is displaced again in a direction approaching the optical disk 1, and a focal point of the light beam is formed on the optical disk 1. Thereafter, the pickup 2 reads the data of the optical disk 1 while moving at the reproduction speed, and the read data is reproduced.
[0017]
FIG. 3 is a flowchart showing a procedure for performing fast forward or fast reverse during data reproduction in the optical disc reproducing apparatus 100, and shows processing executed by the controller 8. When the play button PL is pressed and the pickup 2 moves to read the data of the optical disk 1 and the read data is reproduced, first, the controller 8 determines whether the fast forward button FF or the fast reverse button FR is ON. A determination is made (step S11). Here, when the user presses the fast forward button FF or the fast rewind button FR, the controller 8 determines that the fast forward button FF or the fast rewind button FR is ON (step S11: YES), and the controller 8 as the stopping means picks up. 2 is stopped (step S12). At this time, since the pickup 2 does not read the data, the data is not reproduced, and the sound based on the data is not output from the speaker or the like. Then, the controller 8 as the measuring means measures the time during which the fast-forward button FF or the fast-return button FR is ON by the counter 8a (step S13).
[0018]
Subsequently, the controller 8 determines whether the fast-forward button FF or the fast-return button FR in the ON state is OFF (step S14). Here, when the user releases the fast-forward button FF or the fast-return button FR, the controller 8 determines that the fast-forward button FF or the fast-return button FR is OFF (step S14: YES), and the controller 8 as the calculating means determines this. At this time, the position of the fast forward destination or the fast reverse destination is calculated based on the time stored in the counter 8a (step S15). Specifically, a position corresponding to a time obtained by adding the time during which the buttons FF and FR are ON to the data reproduction time when the fast forward button FF or the fast reverse button FR is turned ON is The position of the fast forward or fast reverse destination. Then, the pickup 2 is moved to a position of the fast-forward destination or fast-rewind destination calculated by the controller 8 as moving means at a speed higher than that at the time of reproduction (step S16), and the pickup 2 moved by the controller 8 as reproduction start means. The data on the optical disc 1 is read from the position of the fast forward or fast reverse destination, and reproduction of the read data is started (step S17). At this time, a sound based on the reproduced data is output from a speaker or the like. Thereafter, when the fast forward button FF or the fast reverse button FR is pressed again during the reproduction, the processing of steps S11 to S17 is repeatedly executed.
[0019]
By performing fast-forward or fast-reverse during data reproduction in the above procedure, data is not read when the pickup 2 is moved to the fast-forward or fast-rewind destination, and data is read after moving. When performing fast forward or fast reverse during data reproduction, even if there is a scratch or dirt on the optical disc 1, the reading is skipped, and a reading error in which the data itself cannot be read normally, or a read error occurs in the read data. It is possible to prevent the occurrence of a data error that becomes possible data. For this reason, as described in Japanese Patent Application Laid-Open No. H11-144399, countermeasures against errors such as pre-reading of data to detect an error in advance, retry of reading, and reproduction of next data by skipping error data are performed. This eliminates the need, and allows the pickup 2 to be quickly and reliably moved to a desired fast-forwarding or fast-rewinding destination, thereby continuing playback.
[0020]
In the above embodiment, the pickup 2 is stopped while the fast-forward button FF or the fast-reverse button FR is pressed, so that the data is not reproduced and the sound based on the reproduced data is not output from the speaker or the like. However, during this time, seek sound data for outputting a seek sound for causing the user to recognize that fast forward or fast reverse is being performed may be reproduced as pseudo data. The seek sound is a sound that is output when sound data stored on the optical disc 1 is read by the pickup 2 at a speed higher than that at the time of reproduction and reproduced. This seek sound is output from a speaker or the like at a higher speed than during normal data reproduction. When the pickup 2 reads the TOC (Table of contents) information stored in the optical disk 1, the seek sound data is sampled and read in an appropriate section of the data area of the optical disk 1, and is stored in the storage unit 9. Is done. Alternatively, the seek sound data created in advance may be stored in the storage unit 9. Note that, in the present embodiment, the controller 8 constitutes a reproducing unit in the present invention.
[0021]
FIG. 4 is a flowchart showing a procedure for performing fast-forward or fast-reverse during data reproduction in the embodiment, and shows a process executed by the controller 8. When the play button PL is pressed and the pickup 2 moves to read the data of the optical disk 1 and the read data is reproduced, first, the controller 8 determines whether the fast forward button FF or the fast reverse button FR is ON. A determination is made (step S21). Here, when the user presses the fast forward button FF or the fast rewind button FR, the controller 8 determines that the fast forward button FF or the fast rewind button FR is ON (step S21: YES), and the controller 8 as the stopping means picks up. 2 is stopped (step S22), and the controller 8 as a reproducing unit reads out and reproduces the seek sound data stored in the storage unit 9 (step S23a). At this time, a seek sound is output from a speaker or the like. Then, the counter 8a measures the time during which the fast-forward button FF or the fast-return button FR is ON by the controller 8 as a measuring means (step S24).
[0022]
Subsequently, the controller 8 determines whether the fast-forward button FF or the fast-return button FR in the ON state is OFF (step S25). Here, when the user releases the fast-forward button FF or the fast-reverse button FR, the controller 8 determines that the fast-forward button FF or the fast-reverse button FR is OFF (step S25: YES), and the controller 8 as a reproducing unit seeks. The reproduction of the sound data is stopped (step S26a). At this time, the seek sound is not output from the speaker or the like. When the reproduction of the seek sound data is stopped, the controller 8 as the calculating means calculates the position of the fast forward destination or the fast reverse destination based on the time stored in the counter 8a at this time (step S27). Specifically, a position corresponding to a time obtained by adding the time during which the buttons FF and FR are ON to the data reproduction time when the fast forward button FF or the fast reverse button FR is turned ON is The position of the fast forward or fast reverse destination. Then, the pickup 2 is moved at a speed higher than that at the time of reproduction to the fast-forward destination or the fast-rewind destination calculated by the controller 8 as the moving means (step S28), and the pickup 2 moved by the controller 8 as the reproduction start means. The data on the optical disc 1 is read from the position of the fast-forward or fast-rewind destination, and reproduction of the read data is started (step S29). At this time, a sound based on the reproduced data is output from a speaker or the like. Thereafter, when the fast-forward button FF or the fast-return button FR is pressed again during the reproduction, the processing of steps S21 to S29 is repeatedly executed.
[0023]
In the procedure of FIG. 3, if the pickup 2 stops reading data while the fast-forward button FF or the fast-reverse button FR is being pressed, the data is not reproduced during this time, and the sound based on the data is not output. Although the user may feel uneasy about the operation of the optical disc reproducing apparatus 100, since the seek sound is output from a speaker or the like by reproducing the seek sound data in the above procedure, the user can fast-forward or fast-forward from the seek sound. It is possible to clearly recognize that the return is being performed, and the user does not feel uneasy about the operation of the optical disc reproducing apparatus 100.
[0024]
In the embodiment described above, the optical disk 1 made of a CD storing music data is taken as an example of the optical disk 1, but the present invention can also be applied to a DVD storing other image data. . In this case, seek image data for outputting a seek image instead of seek sound data may be reproduced as pseudo data. The seek image is an image that is output when the image data stored on the optical disc 1 is read by the pickup 2 at a higher speed than at the time of reproduction and reproduced. This seek image is output from a television or the like at a higher speed than during normal data reproduction. Similarly to the seek sound data, when the TOC (Table of contents) information stored in the optical disc 1 is read by the pickup 2, an appropriate section of the data area of the optical disc 1 is sampled and read. And stored in the storage unit 9. Alternatively, seek image data created in advance may be stored in the storage unit 9.
[0025]
FIG. 5 is a flowchart showing a procedure for performing fast forward or fast reverse during data reproduction in this embodiment, and shows processing executed by the controller 8. In the figure, the same steps as those in FIG. 4 are denoted by the same reference numerals. In FIG. 5, the seek image data is reproduced by executing step S23b instead of step S23a in FIG. At this time, a seek image is output from a television or the like. Further, step S26b is executed instead of step S26a in FIG. 4 to stop the reproduction of the seek image data.
[0026]
Since the seek image is output from the television or the like by reproducing the seek image data in this manner, the user can clearly recognize that fast-forward or fast-reverse is performed from the seek image. Further, if the seek image data is processed and a horizontal stripe pattern or the like is inserted into the seek image, the user can more clearly recognize that the image is in the fast forward or fast rewind state from the seek image.
[0027]
In the present invention, various embodiments other than those described above can be adopted. For example, in the embodiments of FIGS. 4 and 5, a case where a seek sound or a seek image is output in order to make the user recognize that fast forward or fast reverse is performed during data reproduction is taken as an example. In addition, the present invention may output a sound or a still image notifying that fast-forwarding or fast-rewinding is being performed, or a simple mechanical sound or the like. That is, any means may be used as long as it allows the user to recognize that fast forward or fast reverse is being performed during data reproduction. In this case, the pseudo data for outputting them may be stored in the storage unit 9.
[0028]
【The invention's effect】
According to the present invention, the data is not read when the pickup is moved to the fast forward destination or the fast rewind destination, and the data is read after the pickup is moved. Even if there is a flaw or the like on the optical disc, the pickup can be quickly and reliably moved to a desired fast-forward or fast-rewind destination without causing an error at a certain point of the flaw and stopping the pickup. And the reproduction can be sustained.
[Brief description of the drawings]
FIG. 1 is a block diagram of an optical disc reproducing apparatus according to the present invention.
FIG. 2 is a diagram illustrating an operation of a pickup in the optical disc reproducing device.
FIG. 3 is a flowchart illustrating a procedure for performing fast forward or fast reverse during data reproduction.
FIG. 4 is a flowchart according to another embodiment of the present invention.
FIG. 5 is a flowchart according to another embodiment of the present invention.
FIG. 6 is a diagram illustrating the operation of a pickup in a conventional optical disc reproducing device.
[Explanation of symbols]
1 optical disk 2 pickup 8 controller 9 storage unit 100 optical disk playback device FF fast forward button FR fast reverse button P2 fast forward or fast reverse destination

Claims (4)

The data recorded on the optical disk is read and moved while moving the pickup, and when the fast forward button or the fast reverse button is pressed, the pickup is moved to the fast forward position or the fast reverse position compared to when the reproduction is performed. An optical disc playback device that moves at a high speed,
During playback of the data, when a fast-forward button or a fast-reverse button is pressed, stop means for stopping the pickup,
While the button is pressed, a reproducing unit that reproduces seek sound data that outputs a seek sound for causing the user to recognize that fast forward or fast reverse is being performed,
Measuring means for measuring the time while the button is pressed,
When the button is released, calculating means for calculating the position of the fast forward destination or the position of the fast rewind destination based on the time measured by the measuring means,
Moving means for moving the pickup to the position calculated by the calculating means at a faster speed than during reproduction;
An optical disk reproducing apparatus comprising: a reproduction start unit that reads the data with the moved pickup and starts reproduction. The data recorded on the optical disc is read and moved while moving the pickup, and when the fast-forward button or the fast-reverse button is pressed, the pickup is moved to the fast-forwarding position or the fast-returning position as compared to when the reproduction is performed. An optical disc playback device that moves at a high speed,
During playback of the data, when a fast-forward button or a fast-reverse button is pressed, stop means for stopping the pickup,
While the button is pressed, a reproducing unit that reproduces seek image data that outputs a seek image for causing the user to recognize that fast forward or fast reverse is being performed,
Measuring means for measuring the time while the button is pressed,
When the button is released, calculating means for calculating the position of the fast forward destination or the position of the fast rewind destination based on the time measured by the measuring means,
Moving means for moving the pickup to the position calculated by the calculating means at a faster speed than during reproduction;
An optical disk reproducing apparatus comprising: a reproduction start unit that reads the data with the moved pickup and starts reproduction. The data recorded on the optical disc is read and moved while moving the pickup, and when the fast-forward button or the fast-reverse button is pressed, the pickup is moved to the fast-forwarding position or the fast-returning position as compared to when the reproduction is performed. An optical disc playback device that moves at a high speed,
During the reproduction of the data, when a fast forward button or a fast rewind button is pressed, the pickup is stopped, the time during which the button is pressed is measured, and when the button is released, Calculate the position of the fast forward destination or the position of the fast rewind destination based on the measured time, move the pickup to the calculated position at a faster speed than during reproduction, and read the data by the pickup. An optical disk reproducing device for reproducing. The optical disc reproducing apparatus according to claim 3,
During the reproduction of the data, when the fast forward button or the fast reverse button is pressed, the pseudo data for recognizing that the user is performing fast forward or fast reverse is reproduced, and when the button is released. An optical disc reproducing apparatus for stopping reproduction of the pseudo data.

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