JP2002117624A - Disk player - Google Patents

Abstract

PROBLEM TO BE SOLVED: To output a scratch reproducing sound with less sense of incongruities in a disk player, when the data playback direction is inverted by inverting the rotating direction of a dial for a scratch playback. SOLUTION: The disk player is provided with a playback means for playing contents data recorded on a disk, a storage means into which the contents data played by the playback means are stored, a designation means for designates the readout speed and the readout direction of the contents data stored in the storage means, and a control means which performs control to read and output the contents data from the storage means, on the basis of the readout speed and the readout direction designated by the designation means and which perform control to change the readout speed, as designated by the designation means, after lowering the readout speed to the minimum for reading the contents data from the storage means, when the inversion of the readout direction is designated by the designation means.

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 reproducing a disc on which content data such as audio data and video data are recorded.

[0002]

2. Description of the Related Art When playing an analog disk (record disc) with a player in a dance hall, disco, or the like, the playback speed and playback direction of an audio signal are variably operated, and two different players are used. DJ (D
(i.e., isc Jockey), it is necessary to use an analog player to turn the turntable in the forward or reverse direction by holding the turntable of the analog player with a finger and slowly stopping the rotation. In some cases, special reproduction such as scratch reproduction that produces a rubbing sound is performed.
In recent years, CDs (Compact Dis
With the spread of optical disks such as c), digitally recorded optical disks have come to be used in place of analog disks in applications such as DJ playback operations. An example of a reproducing apparatus capable of performing special reproduction using an optical disk is an optical disk player disclosed in Japanese Patent Application Laid-Open No. 7-29183.

In this reproducing apparatus, when performing scratch reproduction using an optical disk, instead of temporarily storing audio data reproduced from the optical disk in a memory and quickly turning a turntable of an analog player manually,
Turn the jog (JOG) dial on the operation panel quickly and manually to detect the rotation direction and rotation speed, change the data read direction from the memory according to the rotation direction, and read the data from the memory according to the rotation speed. By changing the reading speed, a sound similar to the rubbing sound is generated and output. When detecting the rotation speed with the jog dial, the ON / OFF of the two switches provided on the jog dial is switched with the rotation of the jog dial, and the number of times the switch is switched within a certain time (the number of pulses output with the switch) The rotation speed is detected by detecting the number. When detecting the rotation direction of the jog dial, if the initial rotation direction is changed to the opposite direction, the switching order of ON and OFF of the two switches will be reversed, and from the two switches output with the switching The rotation direction is detected by detecting the phase difference between the pulses.

[0004]

In a reproducing apparatus that uses a jog dial to detect a rotation speed and a rotation direction, when the rotation direction of the jog dial is reversed and operated, the rotation of the jog dial is instantaneously stopped when the operation is reversed. I do. The detection of the rotation of the jog dial is performed by detecting ON and OFF of the switch at intervals of, for example, about 100 msec. If the reversing operation is performed in a shorter time than this time interval, the jog dial switch detection cannot follow the operation speed, and when the reversing operation is detected, the operation speed in the opposite direction has already increased. There was a case where the instantaneous stop of the reproduction based on the instantaneous rotation stop was not performed. For this reason, there is a problem that the sound is reproduced as a sound different from the rubbing sound when operating the analog disk.

The problem to be solved by the present invention is to eliminate such a problem and to control the reading speed of audio data corresponding to the stop of rotation when the jog dial is reversed, and compare the speed with the scratch reproduction of an analog disk. In this case, a rubbing sound with less discomfort is output.

[0006]

According to a first aspect of the present invention, there is provided a disk reproducing apparatus that reproduces content data recorded on a disk, storage means for storing the content data reproduced by the reproducing means, and storage. Means for designating a read speed and a read direction of the content data stored in the means; and performing control for reading and outputting the content data from the storage means based on the read speed and the read direction specified by the specify means. If the reading direction is specified by the means to be reversed, control is performed to reduce the reading speed to the minimum speed when reading the content data from the storage means and then change the reading speed to the reading speed specified by the specifying means. It has means.

[0007]

FIG. 1 is a block diagram showing a configuration of a disk reproducing apparatus according to an embodiment of the present invention. The optical disc 1 is held by a spindle motor 3 and driven to rotate. The optical pickup 2 reproduces data recorded on the optical disc 1. The servo control circuit 4 performs rotation control of the spindle motor 3 and focus control and tracking control of the optical system of the optical pickup 2 so that the optical pickup 2 reproduces data from the optical disk 1.

The digital audio data read by the optical pickup 2 is demodulated by a signal processing circuit 5 and input to a shock-proof memory controller 6 for controlling a memory (RAM: Random Access Memory) 7. The data input from the signal processing circuit 5 is
It is stored in M7. When data is needed, the shock proof memory controller 6 reads the data from the RAM 7 and outputs it to the DSP 8.

The DSP 8 stores data from the shock proof memory controller 6 in the RAM 9 and
The reading speed is varied from the AM 9 to perform variable reading such as scratch reproduction, and when data is stored in the RAM 9, digital signal processing for giving an acoustic effect such as reverb is performed. Digital filter 1
0 performs processing such as sound quality adjustment, fade-in, or fade-out on the data from the DSP 8. DA converter
(D / A) 11 converts digital audio data into an analog audio signal. The amplifier 12 amplifies the analog audio signal. The microcomputer (microcomputer) 15 includes a servo control circuit 4, a signal processing circuit 5, a shock proof memory controller 6, a DSP 8, a digital filter 10, an amplifier 12, and a clock generation circuit 1.
4 is controlled. The microcomputer 15 controls the reproduction processing of the optical disc 1 and the like based on the operation of the operation unit 16.

The clock generation circuit 17 is a circuit for generating an operation clock of the shock proof memory controller 6, the DSP 8, the digital filter 10, and the D / A 11, and by variably generating the clock cycle,
The data storage and reading speeds are variably controlled. The operation unit 16 is a jog dial 16a that rotates in the directions of arrow A (clockwise) and arrow B (counterclockwise) for designating the read direction and read speed of the data stored in the RAM 7 and RAM 9, and the reproduction of the optical disk 1. A plurality of operation buttons such as a CUE button 16b for returning the position to the start position of the audio data, a PLAY button 16c for starting the reproduction of the optical disk 1, and a slide volume 16d for variably operating the reproduction speed of the optical disk 1 are provided. Operation unit 15
Is provided with a display unit 16 such as an FL tube display. Display 16
Displays the playback position and the like during audio playback.

When an instruction to wait at the reproduction start position of the optical disk 1 is given by the CUE button 16c, the data recorded on the optical disk 1 is reproduced by the optical pickup 2. At this time, the optical pickup 2 is controlled by the servo control circuit 4. The data reproduced by the optical pickup 2 is stored up to a predetermined storage capacity in the RAM 7 via the signal processing circuit 5 and the shockproof memory controller 6, and the reproduction standby state is set.

Shock proof memory controller 6
Stops reading data from the RAM 7 and waits until the PLAY button 16c is pressed. And P
When the LAY button 16c is pressed, the data stored in the RAM 7 is read out by the shock proof memory controller 6, stored in the RAM 9 via the DSP 8, read out of the RAM 9 by the DSP 8, and processed by the digital filter 10, D / A 11 , And an analog audio signal from the output terminal 13 via the amplifier 12. When the data stored in the RAM 7 is read, R
The data read from the optical disc 1 is stored in the RAM 7 following the data last stored in the AM 7.

In the case of performing scratch reproduction by the disk reproducing apparatus of the present embodiment, when the jog dial 16a is rotated in the direction of arrow A during reproduction of the optical disk 1, sounds are reproduced in the recorded order, and the regular rotation is performed. When the rotation is faster than the number, the reading speed of the RAM 7 becomes faster and the pitch becomes higher, and when the rotation is lower than the normal rotation speed, the reading speed of the RAM 7 becomes lower and the pitch becomes lower.
When the jog dial 16a rotates in the direction of arrow B, sounds are reproduced in the reverse order of the recorded order. When the jog dial 16a is rotated faster than the normal number of revolutions, the reading speed of the RAM 7 increases, and the pitch increases. When the rotation is slower than the normal rotation speed, the reading speed of the RAM 7 is reduced, and the sound is reduced in pitch. By repeating the operation in combination with the rotation in the direction of arrow A and the rotation in the direction of arrow B, a rubbing sound, a so-called scratch sound, is reproduced.

Inside the jog dial 16a, a switch which is turned on and off when the dial is turned,
And a switch for determining the rotation direction. Here, the ON / OFF switching frequency is determined by the jog dial 16
It increases in proportion to the rotation speed of a. Jog dial 16
The rotation speed a is calculated based on the number of times the switch is turned on and off within a detection time set in the microcomputer 15 in advance. When the rotation speed is high, the reading speed from the RAM 9 is increased, and when the rotation speed is low, the reading speed from the RAM 9 is reduced. The value of the rotation speed of the jog dial 16a and R
A data table or a relational expression relating the reading speed value of the AM 9 is stored in the microcomputer 15 in advance.
When the jog dial 16a is operated, the microcomputer 15 detects the rotation speed of the jog dial 16a, obtains the value of the reading speed of the RAM 9 from the data table or the relational expression stored in the microcomputer 15, and obtains the clock generation circuit 17, the DSP 8 , The reading speed of the RAM 9 is variably controlled.

Before starting the scratch reproduction, the PLAY button 16c is pressed, and the reproduction of the optical disk 1 is started.
It is assumed that an analog audio signal is being output.
Then, the scratch reproduction is performed by switching the jog dial between the direction of arrow A and the direction of arrow B.

FIG. 2 is a flowchart showing an operation of scratch reproduction of the disk reproducing apparatus of the present embodiment. When the jog dial 16a is turned in the direction of arrow A, the jog dial 16a is turned on each time the jog rotation speed is detected (S2).
Is detected. The value of the rotation speed of the jog dial 16a stored in the microcomputer 15 and the RAM
The microcomputer 15 obtains and sets the reading speed of the RAM 9 from the detected rotation speed of the jog dial 16a using a data table relating the reading speed value of No. 9 or a formula of a proportional relationship.

Next, it is determined whether or not the rotation direction of the jog dial 16a has been reversed (S4). Here, even when the jog dial 16a is turned from a non-turned state, it is treated as a reversal of the jog rotation direction. If not inverted (NO in S4), the microcomputer 15 sets the R set in S3.
When the AM reading speed is instructed to the clock generation circuit 14, the shock proof memory controller 6, the DSP
8, the operation clock of the digital filter 10 and the D / A is a clock speed based on the set read speed. Based on this operation clock, the data stored in the RAM 7 is read out by the shock proof memory controller 6, written into the RAM 9 via the DSP 8, and read out simultaneously with the digital filter 1.
0 and an analog audio signal via the D / A 11. As described above, the read speed set in the clock generation circuit 14 is controlled, and a scratch sound can be output. Then, returning to S2, S3, S4
Is repeated.

If the direction of rotation of the jog dial 16a is reversed (YES in S4), the operations of S2 to S4 can be replaced with the operations of an analog player, and the rotating turntable can be stopped with a finger to force the arrow A. Since the operation is performed in the case of turning in the direction, the turntable is momentarily stopped at the same time as the reversal. In the present embodiment, when the rotation direction of the jog dial 16a is reversed, the microcomputer 15 instructs the clock generation circuit 14 to set the read speed of the RAM 9 to 0, or to set the read speed to the lowest within a range controllable by the DSP 8. By performing the process of instantaneously stopping the reading of the RAM 9, the same reproduction as the instantaneous rotation stop is performed.
(S6).

Next, every time the jog rotation speed is detected (S
7), the rotation speed of the jog dial 16a after rotation reversal is detected, and the microcomputer 15 obtains and sets the reading speed of the RAM 9 based on the detected rotation speed (S8).

The reversal of the rotation direction of the jog dial is detected (S9). If reversal is detected (YES in S9),
The process returns to S6 to perform the processing to give an effect of producing a sound as if stopped for a moment. If inversion is not detected (N at S9)
O), returning to S2, and in S2 to S5, the microcomputer 15
Performs variable control to increase the reading speed of the RAM 9 that was set to the lowest value in S6 when the jog dial 16a is inverted to the reading speed of the RAM 9 based on the rotation speed detected after the inversion of the jog dial. In order to smoothly perform the variable control of the reading speed of the RAM 9, the microcomputer 15 instructs the clock generation circuit 14 to increase the reading speed of the RAM 9 by a constant value every time the variable clock speed is instructed.
This constant value is determined based on the minimum value of the reading speed of the RAM 9 and the rotation speed detected after the jog dial is inverted.
9 is calculated by dividing the read speed difference 9 by a coefficient stored in the microcomputer 15 in advance.

By repeating the above processing, when the rotation of the jog dial is started or when the rotation of the jog dial is reversed, the reading speed of the RAM is set to the minimum value, and then the RA based on the rotation speed of the jog dial is set.
By gradually changing the reading speed to M, a scratch sound close to that of an analog player can be reproduced.

In this embodiment, the jog dial is used for the scratch reproduction operation. However, the scratch reproduction operation may be performed using a pad using a touch sensor or the like, or other operation means. Alternatively, a method may be used in which a scratch sound as if operated is generated in a simulated manner by a processing of a microcomputer or the like, without actually performing the operation.

[0023]

According to the disk reproducing apparatus of the present invention, it is possible to reduce the sense of incongruity of the scratch reproduction sound when the reproduction direction is reversed.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a disk reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a scratch reproducing operation of the disk reproducing apparatus of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Optical disk 2 ... Optical pick-up 3 ... Spindle motor 4 ... Servo control circuit 5 ... Signal processing circuit 6 ... Shock-proof memory controller 7, 9 ... RAM8 ... DSP 10 Digital filter 11 DA converter (D / A) 12 Amplifier 13 Output terminal 14 Clock generation circuit 15 Microcomputer 16 Operation unit 16a・ ・ ・ JOG dial 16b ・ ・ ・ CUE button 16c ・ ・ ・ PLAY button 16d ・ ・ ・ Slide volume 17 ・ ・ ・ Display part

Claims (1)

[Claims] 1. A reproducing means for reproducing content data recorded on a disk, a storage means for storing content data reproduced by the reproducing means, and a reading speed and a reading direction of the content data stored in the storing means. And performing control to read and output content data from the storage unit based on the read speed and the read direction specified by the specifying unit, and to reverse the read direction by the specifying unit. When the content data is read from the storage means, the control means performs control to change the read speed to the read speed specified by the specifying means after reducing the read speed to the minimum speed when reading the content data from the storage means. Disk playback device.