JP2005011421A - Optical disk player - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk player which enables user to search for a position for performing special reproduction such as scratch reproduction without confirming the reproduction time of audio data like in an analog record player and enables the user to start special reproduction in a short period of time. <P>SOLUTION: The optical disk player is provided with: a storage part storing the audio data read by a reading part; an operation knob moved in a determined section; a slide volume control provided with a driving part moving the operation knob; and a control part controlling the driving part so that the operation knob is moved in the determined section in accordance with a reproducing time of audio data read out from the storing part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optical disc reproducing apparatus for reproducing audio data recorded on an optical disc.
[0002]
[Prior art]
A disc jockey (disc jockey, hereinafter referred to as DJ) that operates an optical disc reproducing device to reproduce audio data is audio data recorded on an optical disc such as an analog record or a compact disc (compact disc, hereinafter referred to as a CD). During playback, special playback called scratch playback, which generates a sound effect such as a humming sound, may be performed. When the DJ performs scratch reproduction using an analog record player, the DJ generates a rubbing sound by quickly rotating the analog record in the clockwise direction or the counterclockwise direction. Further, there is a DJ CD player capable of performing special reproduction similar to scratch reproduction by the analog record player. This DJ CD player includes a jog dial and a memory, stores audio data reproduced from the CD in the memory, and reads the audio data stored in the memory by rotating the jog dial clockwise or counterclockwise. Controls the speed and reading order to generate sound effects equivalent to rubbing sounds from analog records. In this way, the DJ can perform special reproduction such as scratch reproduction similar to the analog record by rotating the jog dial in the same manner as the analog record while reproducing the audio data recorded on the CD. it can. (For example, see Patent Document 1.)
[0003]
When searching for a certain track (for example, the third of 10 tracks) recorded on the CD using the DJ CD player as described above, the DJ presses a track search button or the like. When searching audio data in frame units, the DJ rotates the jog dial. For example, when the jog dial is rotated clockwise, the audio data playback time advances by one frame every time the jog dial is rotated. When the jog dial is rotated counterclockwise, the audio data playback time is It goes back one frame for every rotation.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-31857
[Problems to be solved by the invention]
Usually, the DJ predetermines a position for performing special reproduction such as scratch reproduction. When performing special playback such as scratch playback using an analog record player, the DJ confirms the position where the sticker is pasted by sticking a sticker to the position where special playback such as scratch playback of the analog record is performed in advance. Since the record needle can be moved, special reproduction such as scratch reproduction can be started from a predetermined reproduction position in a short time. On the other hand, when searching for a position for performing special reproduction such as scratch reproduction using a conventional DJ CD player, the DJ cannot attach a sticker to the CD. For this reason, the DJ performs the following operations. First, the track search button of the DJ CD player is operated to search the head position of the target track. Then, by rotating the jog dial from that position, a predetermined reproduction position is searched while confirming the reproduction time (minute, second, frame) of the audio data of the track displayed on the display unit. Therefore, the DJ has to perform two operations, a track search button operation and a jog dial operation, in order to start special reproduction such as scratch reproduction from a predetermined reproduction position. For this reason, in the conventional DJ CD player, since the operation for searching for the reproduction position is different from the operation in the analog record player, there is a problem that it takes a long time to start special reproduction such as scratch reproduction.
[0006]
The present invention has been made to solve the above-described problem, and, like an analog record player, scratch playback without confirming the playback time (minutes, seconds, frames) of audio data displayed on the display unit. It is an object of the present invention to provide an optical disc reproducing apparatus capable of searching for a position where special reproduction such as the above is performed and starting special reproduction in a short time.
[0007]
[Means for solving the problems]
In order to solve the above problems, the invention according to claim 1 of the present application includes a reading unit that reads audio data recorded on an optical disc, a storage unit that stores audio data read by the reading unit, and the storage unit. In an optical disc playback apparatus comprising an output unit for converting audio data stored in the analog audio signal and outputting the analog audio signal, an operation knob unit for moving a predetermined section and a drive unit for driving the operation knob unit are provided. A slide volume unit, and a control unit that controls the drive unit so that the operation knob unit moves in the predetermined section in accordance with a reproduction time of audio data read from the storage unit. And
[0008]
The invention according to claim 2 of the present application is the optical disk reproducing apparatus according to claim 1, wherein when the control unit reads out audio data of one track from the storage unit, the predetermined section is set in the drive unit. The control knob moves the operation knob from the start position to the end position, and when the audio data of all tracks is read from the storage section, the operation knob moves from the start position of the predetermined section to the end position. It is characterized by comprising switching means for switching between control for moving the part.
[0009]
Further, the invention according to claim 3 of the present application is the optical disk reproducing apparatus according to claim 1 or 2, wherein the control unit moves the position of the operation knob unit to the reading unit when the operation knob unit is moved. The audio data is controlled to be read from the reproduction time corresponding to.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of an optical disk reproducing apparatus according to an embodiment of the present invention. In FIG. 1, 1 is a turntable, 2 is a spindle motor, 3 is a servo control unit, 4 is an optical pickup, 5 is a reproduction amplifier, 6 is a signal processing unit, 7 is a memory control unit, and 8 is a random access memory (Random Access Memory). 9 is a digital-to-analog converter (hereinafter referred to as DAC), 10 is an amplifier, 11 is an output terminal, 12 is a control unit, 13 is a display unit, and 14 is a display unit. An operation unit, 15 is a slide volume unit, 16 is an operation knob, 17 is a motor, and 18 is a variable resistance unit. An optical disk reproducing apparatus according to an embodiment of the present invention includes a jog dial unit in the operation unit 14, and the reading speed of digital audio data reproduced from a CD and stored in the RAM 8 according to the rotation speed and rotation direction of the jog dial unit and This is a DJ CD player that can change the reading order.
[0011]
The turntable 1 attached to the spindle motor 2 fixes the CD. When a playback start instruction is input from a playback button of the operation unit 14 to be described later, the servo control unit 3 controls to rotate the spindle motor 2 at a predetermined linear velocity. In addition, the servo control unit 3 controls a focus servo circuit and a tracking servo circuit (not shown) in order to correctly trace the laser light from the optical pickup 4 in the CD pit row.
[0012]
Digital audio data read by the optical pickup 4 is shaped and amplified by a reproduction amplifier 5 and input to a signal processing unit 6. The signal processing unit 6 demodulates the digital audio data, extracts an error signal such as a focus error signal and a tracking error signal, and extracts a synchronization signal, and inputs the digital audio data to the memory control unit 7. Further, TOC (Table Of Contents) information read from the CD is stored in a storage unit built in the control unit 12.
[0013]
The memory control unit 7 controls the input digital audio data to be input to the RAM 8. The RAM 8 stores digital audio data under the control of the memory control unit 7. The digital audio data stored in the RAM 8 is read out and input to the DAC 9 under the control of the memory control unit 7.
[0014]
The DAC 9 converts the digital audio data into an analog audio signal and inputs the analog audio signal to the amplifying unit 10. The analog audio signal input from the DAC 9 is amplified by the amplification unit 10. The analog audio signal amplified by the amplifying unit 10 is output as a musical sound from a speaker or the like connected to the output terminal 11.
[0015]
The display unit 13 displays the reproduction time (minute, second, frame), track number, and the like of the audio data read from the RAM 8 under the control of the memory control unit 7. The operation unit 14 includes a playback button, a playback stop button, a track search button, an eject button, a switching button described later, and a jog dial unit.
[0016]
FIG. 2 is a diagram for explaining the slide volume unit 15 provided in the CD player according to one embodiment of the present invention.
The slide volume unit 15 connected to the control unit 12 includes an operation knob 16, a motor (drive unit) 17, and a variable resistance unit 18 whose resistance value changes. The motor 17 moves the operation knob 16 within the section from the start position line 21 to the end position line 22 under the control of the control unit 12 while the audio data is being reproduced. The control unit 12 controls the motor 17 so that the operation knob 16 moves in the section from the start position line 21 to the end position line 22 (hereinafter referred to as “one track movement”) every time one track is reproduced. Alternatively, when all tracks are reproduced, the motor 17 is controlled so that the operation knob 16 moves in the section from the start position line 21 to the end position line 22 (hereinafter referred to as all track movement). The control unit 12 switches control between “one track movement” and “all track movement” by using a switching button of the operation unit 14.
[0017]
The variable resistance portion 18 is electrically connected to the operation knob 16. The resistance value of the variable resistance portion 18 changes according to the position of the operation knob 16. When a voltage having a constant value is applied to the variable resistance unit 18, a voltage corresponding to the resistance value of the variable resistance unit 18 is input to the control unit 12. For example, when the variable resistance portion 18 whose resistance value varies in the range of 0Ω to 10 kΩ is used, and the position of the operation knob 16 is the start position line 21, the resistance value of the variable resistance portion 18 is set to 0Ω. When the position 16 is the intermediate position line 23, the resistance value of the variable resistance portion 18 is 5 kΩ, and when the position of the operation knob 16 is the end position line 22, the resistance value of the variable resistance portion 18 is 10 kΩ. By associating the resistance value of the variable resistor 18 and the position of the operation knob 16 in this manner, the control unit 12 can determine the position of the operation knob 16 from the voltage value input from the variable resistor 18. it can.
[0018]
The instruction line 24 is a plurality of lines provided at equal intervals in the section from the start position line 21 to the intermediate position line 23 and in the section from the intermediate position line 23 to the end position line 22. The instruction line 24 shown in FIG. 2 is provided so as to equally divide the section from the start position line 21 to the intermediate position line 23 and the section from the intermediate position line 23 to the end position line 22. The start position line 21, the end position line 22, the intermediate position line 23, and the instruction line 24 are printed on the panel on the upper surface of the CD player of this embodiment. Moreover, the slide volume part 15 is arrange | positioned at the panel of the upper surface.
[0019]
FIG. 3 is a diagram showing a side cross-section of the jog dial unit provided in the operation unit 14 of the CD player according to one embodiment of the present invention. In FIG. 3, 31 is a jog dial, 32 is a scale part, 33 is a rotating shaft, 34 is a slit part, 35 is an optical sensor part, and 36 is a top panel. In the CD player of this embodiment, the jog dial 31 has the same size as an analog record having a diameter of 10 cm to 30 cm and is attached to the top panel 36 of the CD player.
[0020]
The jog dial 31 and the scale portion 32 are fixed to the rotating shaft 33. For this reason, when the jog dial 31 is rotated, the jog dial 31 and the scale portion 32 rotate integrally. Rectangular slits 34 are provided at equal intervals on the outer periphery of the scale 32 for detecting the rotation state of the jog dial 31. When the material of the scale part 32 is a metal, the slit part 34 is a rectangular opening. However, the shape of the opening is not limited to a rectangle, and may be an appropriate shape. In the case where a transparent or translucent plastic or the like is used as the scale portion 32, the slit portion 34 is formed by printing. In this case, when carbon is included in the printing paint of the slit part 34, the accuracy of detecting the slit part 34 by the optical sensor part 35 is improved.
[0021]
The optical sensor unit 35 includes two optical sensors in order to detect the rotation direction of the scale unit 32 that rotates integrally with the jog dial 31 and is attached to a position where the slit unit 34 can be detected. When the optical sensor unit 35 detects the slit unit 34, the optical sensor unit 35 generates a pulse signal corresponding to the rotation state (rotation angle and rotation direction) of the jog dial 31 and inputs the pulse signal to the control unit 12. The control unit 12 controls the memory control unit 7 by determining the reading speed and direction of the digital audio data stored in the RAM 8 according to the pulse signal input from the optical sensor unit 35. The memory control unit 7 controls the reading speed and reading order of digital audio data stored in the RAM 8 (reading audio data in ascending order or reading out in descending order).
[0022]
The operation of the slide volume unit 15 at the time of audio data reproduction of the CD player of this embodiment will be described. The DJ switches the control performed by the control unit 12 to the motor 17 to “1 track playback” or “all track playback” by pressing the switching button of the operation unit 14. Here, in this embodiment, the slide volume portion 15 includes a variable resistance portion 18 whose resistance value changes in a range of 0Ω to 10 kΩ, and the operation knob 16 has a start position line 21, an intermediate position line 23, and an end position line 22. The resistance values of the variable resistor section 18 when positioned at 0 are 0Ω, 5 kΩ, and 10 kΩ, respectively.
[0023]
First, the case where the control of the control unit 12 is switched to “1-track playback” will be described. The control unit 12 assigns the reproduction time of the track to be reproduced from the TOC information stored in the built-in storage unit so as to correspond to the resistance value of the variable resistance unit 18 of the slide volume unit 15 for each frame. When the track playback time is 4 minutes 00 seconds 00 frames, the playback time corresponding to the resistance value of the variable resistor 18 being 0Ω (the position of the operation knob 16 is the start position line 21) is 0 minutes 00 seconds 00 frames. Become. The reproduction time corresponding to the resistance value of the variable resistor 18 being 5 kΩ (the position of the operation knob 16 is the intermediate position line 23) is 2 minutes 00 seconds 00 frames. The reproduction time corresponding to the resistance value of the variable resistance portion 18 being 10 kΩ (the position of the operation knob 16 is the end position line 22) is 4 minutes 00 seconds 00 frames. Each instruction line 24 is assigned a reproduction time of 12 seconds from the start position line 21.
[0024]
The operation knob 16 is positioned on the start position line 21 when starting the reproduction of the track. When the reproduction of the track is started, the control unit 12 controls the motor 17 so that the operation knob 16 starts to move from the start position line 21 to the end position line 22. At this time, the control unit 12 controls the motor so that the reproduction time allocated corresponding to the position of the operation knob 16 (resistance value of the variable resistor unit 18) matches the reproduction time of the audio data read from the RAM 8. 17 is controlled to move the operation knob 16. The playback time of the audio data is detected from the track elapsed time information included in the subcode separated from the audio data by the control unit 12. When the reproduction of the track ends, the control unit 12 controls the motor 17 so that the operation knob 16 moves to the end position line 22. When the reproduction of the track is completed, the control unit 12 controls the motor 17 so that the operation knob 16 returns to the start position line 21. Usually, since a silence portion of 2 to 3 seconds is recorded between tracks on a CD, the operation knob 16 returns to the start position line 21 while the silence portion is being reproduced. . The control unit 12 repeats the above control for each track until the reproduction of the CD is completed.
[0025]
In the CD player in the above-described embodiment, the operation knob 16 indicates the playback position in the track being played. Therefore, the DJ can confirm the reproduction position in the currently reproduced track from the position of the operation knob 16. The DJ confirms the playback position in the track from the position of the operation knob 16, and searches the position for performing special playback such as scratch playback by moving the operation knob 16. When the DJ moves the operation knob 16, the control unit 12 controls the memory control unit 7 so as to erase the audio data stored in the RAM 8. Then, the optical pickup 4 is moved to a position where the elapsed time of the track corresponding to the moved position of the operation knob 16 is recorded, and control to start reading audio data is performed. Audio data read by the optical pickup 4 is stored in the RAM 8, converted into an audio signal by the DAC 9, and output from the output unit 11. The DJ can perform the same operation as an analog record player by pasting a sticker on the instruction line 24 in advance to a position where special reproduction such as scratch reproduction is performed and moving the operation knob 16 to the position where the sticker is attached. , Search time can be shortened.
[0026]
Next, a case where the control of the control unit 12 is switched to “all track reproduction” will be described. The control unit 12 assigns the reproduction time of all tracks recorded on the CD from the TOC information stored in the built-in storage unit so as to correspond to the resistance value of the variable resistance unit 18 of the slide volume 15 for each frame. When the playback time of all tracks recorded on the CD is 40 minutes 00 seconds 00 frames, the playback time corresponding to the resistance value of the variable resistor 18 being 0Ω (the position of the operation knob 16 is the start position line 21) is 0. It becomes minute 00 second 00 frame. The reproduction time corresponding to the resistance value of the variable resistance portion 18 being 5 kΩ (the position of the operation knob 16 is the intermediate position line 23) is 20 minutes 00 seconds 00 frames. The reproduction time corresponding to the resistance value of the variable resistor 18 being 10 kΩ (the position of the operation knob 16 is the end position line 22) is 40 minutes 00 seconds 00 frames. Each instruction line 24 is assigned a reproduction time of 2 minutes from the start position line 21.
[0027]
The operation knob 16 is located at the start position line 21 when starting the reproduction of the CD. When the reproduction of the CD is started, the control unit 12 controls the motor 17 so that the operation knob 16 starts moving from the start position line 21 to the end position line 22. At this time, the control unit 12 controls the motor so that the reproduction time allocated corresponding to the position of the operation knob 16 (resistance value of the variable resistor unit 18) matches the reproduction time of the audio data read from the RAM 8. 17 is controlled to move the operation knob 16. The reproduction time of the audio data is detected from the absolute time information included in the subcode separated from the audio data by the control unit 12. When the reproduction of all tracks recorded on the CD is finished, the control unit 12 controls the motor 17 so that the operation knob 16 moves to the end position line 22. When the reproduction of all tracks recorded on the CD is completed, the control unit 12 controls the motor 17 so that the operation knob 16 returns to the start position line 21.
[0028]
In the CD player in the above-described embodiment, the operation knob 16 indicates the playback position of the CD being played. Therefore, the DJ can confirm the reproduction position of the track recorded on the currently reproduced CD from the position of the operation knob 16. The DJ confirms the reproduction position in the CD from the position of the operation knob 16, and moves the operation knob 16 to search for a position for performing special reproduction such as scratch reproduction. When the DJ moves the operation knob 16, the control unit 12 controls the memory control unit 7 so as to erase the audio data stored in the RAM 8. Then, the optical pickup 4 is moved to the position where the absolute time corresponding to the moved position of the operation knob 16 is recorded, and control to start reading audio data is performed. Audio data read by the optical pickup 4 is stored in the RAM 8, converted into an audio signal by the DAC 9, and output from the output unit 11. The DJ can perform the same operation as an analog record player by pasting a sticker on the indication line 24 in advance to a position where special reproduction such as scratch reproduction is performed and moving the operation knob 16 to the position where the sticker is attached. , Search time can be shortened.
[0029]
【The invention's effect】
According to the present invention, as in the case of an analog record player, the position for performing special reproduction such as scratch reproduction can be searched without confirming the reproduction time (minute, second, frame) of the audio data displayed on the display unit. In addition, it is possible to provide an optical disk reproducing apparatus capable of starting special reproduction in a short time.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a CD player according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating a slide volume unit 15 included in a CD player according to an embodiment of the present invention.
FIG. 3 is a diagram illustrating a configuration of a jog dial unit included in a CD player according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Turntable, 2 ... Spindle motor, 3 ... Servo control part, 4 ... Optical pick-up, 5 ... Reproduction amplifier, 6 ... Signal processing part, 7 ... Memory control part, 8 ... RAM, 9 ... DAC, 10 ... Amplification part , 11 ... output terminal, 12 ... control section, 13 ... display section, 14 ... operation section, 15 ... slide volume section, 16 ... operation knob, 17 ... motor, 18 ... variable resistance section, 21 ... start position line, 22 ... End position line, 23 ... Intermediate position line, 24 ... Instruction line, 31 ... Jog dial, 32 ... Scale part, 33 ... Rotating shaft, 34 ... Slit part, 35 ... Optical sensor part, 36 ... Top panel

Claims (3)

A reading unit that reads audio data recorded on the optical disc; a storage unit that stores the audio data read by the reading unit; and an output unit that converts the audio data stored in the storage unit into an analog audio signal and outputs the analog audio signal. In an optical disk playback device comprising:
An operation knob portion that moves in a defined section; a slide volume portion that includes a drive portion that drives the operation knob portion;
An optical disc playback apparatus comprising: a control unit that controls the drive unit so that the operation knob unit moves within the predetermined section in accordance with a playback time of audio data read from the storage unit. The optical disk reproducing apparatus according to claim 1, wherein
The control unit controls the drive unit to move the operation knob unit from the start position to the end position of the determined section when audio data of one track is read from the storage unit, and from the storage unit. An optical disc reproducing apparatus, comprising: a switching means for switching the control to move the operation knob from the start position to the end position of the predetermined section when the audio data of a track is read. In the optical disk reproducing apparatus according to claim 1 or 2,
The optical disc reproducing apparatus, wherein the control unit controls the reading unit to read audio data from a reproduction time corresponding to the position of the operation knob unit when the operation knob unit is moved.

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