JP2615906B2 - Optical disc player - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual search operation for searching for an arbitrary target position on a disc in an optical disc reproducing apparatus.

2. Description of the Related Art In recent years, optical disc reproducing apparatuses have been used in a wide range of fields because of their excellent operability.

Hereinafter, an example of the above-described conventional optical disc reproducing apparatus will be described with reference to the drawings.

FIG. 2 is a block diagram showing a conventional optical disk reproducing apparatus. In FIG. 2, 1 is an optical disk, 2 is a spindle motor for rotating the optical disk, 3 is an optical pickup for reproducing a signal recorded from the optical disk, and 4 is moving the optical pickup in the tracking direction. A traverse 5 for outputting a spindle control signal from a reproduction signal of the optical pickup, a signal processing means for outputting current position information, and processing a digital music signal; and 6, a spindle control signal output from the signal processing means. A spindle driving means for driving a spindle motor; 7, a tracking error detecting means for detecting a tracking error amount from a reproduction signal of the optical pickup; and 8, an actuator of the optical pickup based on a tracking error signal output from the tracking error detecting means. Drive Actuator driving means, 9 is a traverse driving means for driving the traverse by the tracking error signal, 10 is a D / A conversion means for converting a digital music signal from the signal processing means into an analog music signal, and 11 is an analog music signal. Muting means for muting a signal, n-kick means for controlling the actuator driving means and performing high-speed search operation by kicking n (n is an arbitrary positive integer of 1 or more) tracks, and 13 for m ( m is an arbitrary positive integer of 1 or more; m <n) m kick means for performing a medium speed search operation by kicking a track; input means A for receiving a high speed search command; and 15 for receiving a medium speed search command. Input means B and 16 are pause kick means for repeating a one-track kick operation in a pause state, and 17 is a playback state command. The reproduction state input means 18 is a logical operation means for reading the current position information, controlling the muting means from the information of the input means, and selecting the n kick means, the m kick means and the pause kick means. .

The operation of the optical disc reproducing apparatus configured as described above will be described below.

When a manual search operation is performed to search for an arbitrary target position on a disc while listening to sound, the following is performed. First,
A pause command is input from the reproduction state input means 17, and the logical operation means 18 selects the voskick means 16 to put the optical disc reproducing apparatus into a pause state, and controls the muting means 11 to output a repeated sound of one track. I do.
In this state, when the logic operation means 18 receives a high-speed search command from the input means A14, the n kick means 12 is selected and operated, and the output of the n kick means 12 operates the actuator drive means 8 to cause the optical pickup to operate. 3 is normally moved n tracks in the tracking direction, and play reproduction is performed while the current position information is read from the signal processing means 5, and then, if there is a search command, the n track kick is performed again. One of the reproduced signals from the optical pickup 3 is sent to a signal processing unit 5 and the other is a tracking error detection unit 7.
Sent to The signal sent to the processing means 5 is processed into a spindle control signal, a current position information signal, and a digital music signal. The spindle control signal controls the spindle motor 2 through the spindle driving means 6, and the current position information signal is a logical signal. The digital music signal is sent to the arithmetic
The audio signal is converted into an analog music signal by the A conversion means 10 and becomes an audio output through the muting means 11. The signal sent to the tracking error detecting means 7 detects the tracking error amount of the optical pickup 3, and the detection signal is sent to the actuator driving means 8 and the traverse driving means 9 so that the optical pickup 3 and the traverse 4 are transmitted. Operate and control so that the tracking error becomes zero. In this way, the optical pickup 3 is moved in the vicinity of the target position, and then receives a medium speed search command from the input means B, selects m kick means, performs the same operation as described above, and performs an error from the target position. Stuff. That is, while there is an input according to the command received from the input means, the optical pickup 3 is moved at two different speeds higher than the normal play reproduction speed, and the music signal is reproduced while approaching the target position.

However, in the above-described configuration, two types of input means are required to select the manual search speed, which leads to an increase in cost. In addition, as shown in FIG. The track kick is performed continuously, the search speed is faster than the normal play playback speed, and the kick operation time is longer in the ratio of the kick operation time to the playback time. Therefore, there has been a problem that it is not possible to search for a small arbitrary target position within one track.

The present invention has been made in view of the above problems, and provides an optical disc reproducing apparatus capable of finely searching for an arbitrary target point with a single input unit while listening to sound in units of position information frames.

Means for Solving the Problems In order to solve the above problems, an optical disc reproducing apparatus according to the present invention comprises an optical disc, a spindle motor for rotating the optical disc, and a signal recorded from the optical disc. An optical pickup for reproducing, a traverse for moving the optical pickup in a tracking direction, and a signal processing means for outputting a spindle control signal from a reproduction signal of the optical pickup, outputting current position information, and processing a digital music signal. A spindle drive unit for driving a spindle motor according to a spindle control signal output from the signal processing unit, a tracking error detection unit for detecting a tracking error amount from a reproduction signal of the optical pickup, and an output from the tracking error detection unit. Tracking error Actuator driving means for driving the actuator of the optical pickup by a signal; traverse driving means for driving the traverse by the tracking error signal; and D / A exchange for converting a digital music signal from the signal processing means into an analog music signal. Means, muting means for muting the analog music signal, and n number of kick means for controlling the actuator driving means to perform n (n is any positive integer of 1 or more) number of track kicks to perform a high-speed search operation. A point access means for performing a low-speed search operation by accessing an arbitrary target point in position information frame units; a reproduction state storage means for storing whether a reproduction state is a play state or a pause state; New target position information command Timer means for determining a cycle to be performed, input means for receiving a search command, pause kick means for repeating a one-track kick operation in a pause state, reproduction state input means for receiving a reproduction state command, reading the current position information, and The muting means is controlled from the information of the means and the information of the reproduction state storage means.
The kick unit, the point access unit, and the logical operation unit for selecting the pause kick unit are provided.

According to the present invention, according to the above-described configuration, the input means is only required to select the search speed depending on the reproduction state (pause state or play state). Since the access operation to the new position and the repetitive reproduction operation are performed in units of position information frames, the reproduction time is longer in the ratio of the access operation time to the reproduction time, so that the sound becomes easier to hear and the search can be performed at a low speed. Become. This makes it very easy to manually search for an arbitrary target position on the disc.

Embodiment An optical disc reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an optical disc reproducing apparatus according to a first embodiment of the present invention. In FIG. 1, 19 is an optical disk, 20 is a spindle motor for rotating the optical disk, 21 is an optical pickup for reproducing a signal recorded from the optical disk, and 22 is a movement of the optical pickup in the tracking direction. Traverse 23, which outputs a spindle control signal from the reproduction signal of the optical pickup, outputs current position information,
A signal processing means for processing a digital music signal; 24, a spindle driving means for driving a spindle motor according to a spindle control signal output from the signal processing means; 25, a tracking error for detecting a tracking error amount from a reproduction signal of the optical pickup. Detecting means, 26 is an actuator driving means for driving the actuator of the optical pickup by a tracking error signal output from the tracking error detecting means, 27 is a traverse driving means for driving the traverse by the tracking error signal, 28 is the signal D / A conversion means for converting a digital music signal from a processing means into an analog music signal, 2
9 is a muting means for muting the analog music signal, and 30 is a control means for controlling the actuator driving means.
(N is an arbitrary positive integer of 1 or more) An n-kick means for performing a high-speed search operation by kicking the track, and 31 is a point access means for performing a low-speed search operation by accessing an arbitrary target point in position information frame units. , 32 are playback state storage means for storing whether the playback state is a play state or a pause state, 33 is a timer means for determining a cycle for sending a new target position information command to the point access means, and 34 is an input for receiving a search command. Means, 35 is a pause kick means for repeating a one-track kick operation in a pause state, 36 is a reproduction state input means for receiving a reproduction state command, 37 is a means for reading the current position information, and information of the input means and the reproduction state storage means. The muting means is controlled from the information and the n kick means and the point access means are controlled. A logic operation means for-option.

The operation of the optical disc reproducing apparatus configured as described above will be described below with reference to FIGS. 1 and 3.

When searching for an arbitrary target position on the disc while listening to sound using the manual search operation, the following is performed. When the optical disc player is in the play mode, input means
When the logical operation means 37 receives a search command from 34, the play state is read from the reproduction state storage means 32, the n kick means 30 is selected and operated, and the output of the n kick means 30 is used to drive the actuator. By operating the means 26, the optical pickup 21 is moved normally n in the tracking direction.
After this track is moved and play reproduction is performed while the current position information is read from the signal processing means 23, if there is a search command, the n-track kick is performed again. One of the reproduction signals from the optical pickup 21 is sent to the signal processing means 13 and the other is sent to the tracking error detection means 25. The signal sent to the signal processing means 23 is processed into a spindle control signal, a current position information signal, and a digital music signal.The spindle control signal controls the spindle motor 20 through the spindle driving means 24, and the current position information signal is The digital music signal is sent to the logical operation means 37, converted into an analog music signal by the D / A conversion means 28, and becomes an audio output through the muting means 29. The signal sent to the tracking error detecting means 25 detects the tracking error amount of the optical pickup 21, and the detection signal is sent to the actuator driving means 26 and the traverse driving means 27 so that the optical pickup 21
22 is operated and control is performed so that the tracking error becomes zero. Thus, the optical pickup 20 is moved to the vicinity of the target position at high speed. Next, a pause command is input from the reproduction state input means 36, and the logical operation means 37 selects the pause kick means 35 to put the optical disc reproducing apparatus into a pause state, and controls the muting means 29 to repeat one track. Output sound. In this state, when the logical operation means 37 receives a search command from the input means 34, it reads the pause reproduction state from the reproduction state storage means 32, selects the point access means 31, and points to the target position different from the current position by several frames. The access means 31 is set and operated, and the timer means 33 is started. Even if the logical operation means 37 continuously receives a search command from the input means 34 after accessing the target position, the timer means
At 33, if the predetermined time has not been reached, a pause playback operation is performed at that position, and the playback operation is repeated. And
When a predetermined time is reached in the timer means 33, the pause reproduction operation is terminated, the point access means 31 is selected again, a target position different from the current position by several frames is set in the point access means 31, operated, and the timer means 33 is started. I do. Thus, the optical pickup 21 is converged from the vicinity to the target position.

In this manner, in the play reproduction state, the search is performed while continuously repeating the kick operation as shown in FIG. 3 (a), so that a high-speed search operation is performed. As shown in the figure, the point access is repeated while performing the repetitive reproduction for a certain time in one track, so that the reproduction time is longer in the ratio of the access operation time to the reproduction time, so that the sound is easy to hear.
The low-speed search operation is sufficiently slower than the normal play reproduction speed.

As described above, according to the present embodiment, a point access unit that performs a low-speed search operation by accessing an arbitrary target point in units of position information frames, and a reproduction state that stores whether the reproduction state is a play state or a pause state By newly providing a storage means and a timer means for determining a period for sending a new target position information command to the point access means, one high-speed search and a low-speed search can be performed by one input means, and a position information frame unit is provided. A manual search can be performed while listening to the sound at an arbitrary target point.

As described above, the present invention provides a point access unit for performing a low-speed search operation by accessing an arbitrary target point in position information frame units, and a reproduction state storage for storing whether the reproduction state is a play state or a pause state. Means and a timer means for determining a period for sending a new target position information command to the point access means are provided. It is also possible to perform a manual search while listening to a sound at an arbitrary target point very finely by setting the manual search accuracy to a position information frame unit.

[Brief description of the drawings]

FIG. 1 is a block diagram of an optical disk reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a block diagram of a conventional optical disk reproducing apparatus, FIG. FIG. 3B is an explanatory diagram of the manual search operation of the present invention. 1,19 …… Optical disc, 2,20 …… Spindle motor,
3,21 …… Optical pickup, 4,22 …… Traverse, 5,23
…… Signal processing means, 6,24 …… Spindle driving means, 7,25
…… Tracking error detecting means, 8,26 …… Actuator driving means, 9,27 …… Traverse driving means, 10,28…
… D / A conversion means, 11,29 …… Muting means, 12,30
... n kick means, 13 ... m kick means, 14 ... input means A, 15 ... input means B, 16, 35 ... pause kick means, 17, 36 ... playback state input means, 18, 37 logical operation means, 31 point access means, 32 reproduction state storage means, 33 timer means, 34 input means.

Claims (1)

(57) [Claims] An optical disk; a spindle motor for rotating the optical disk; an optical pickup for reproducing a signal recorded from the optical disk; a traverse for moving the optical pickup in a tracking direction; A signal processing means for outputting a spindle control signal from a reproduction signal of the optical pickup, outputting current position information, and processing a digital music signal, and a spindle drive for driving a spindle motor by the spindle control signal output from the signal processing means Means, a tracking error detecting means for detecting a tracking error amount from a reproduction signal of the optical pickup, and an actuator drive for driving an actuator of the optical pickup based on a tracking error signal output from the tracking error detecting means. Means, traverse driving means for driving the traverse with the tracking error signal, D / A exchange means for converting a digital music signal from the signal processing means into an analog music signal, and muting for muting the analog music signal Means, n-kick means for controlling the actuator driving means to perform a high-speed search operation by kicking n (n is an arbitrary positive integer of 1 or more) tracks, and accessing an arbitrary target point in position information frame units Point access means for performing a low-speed search operation, a playback state storage means for storing whether the playback state is a play state or a pause state, and a timer for determining a period for sending a new target position information command to the point access means. Means, input means for receiving a search command, and pause Pause kick means for repeating a one-track kick operation in a state, a reproduction state input means for receiving a reproduction state command, reading the current position information, and muting means from the information of the input means and the information of the reproduction state storage means. Control the said n
An optical disk reproducing apparatus comprising: a kick unit, a point access unit, and a logical operation unit for selecting a pause kick unit.