JP5349150B2 - Playback apparatus and playback method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reproduction device in which the positional relation between a data readout position and a marker attached to an operation disk part is adjusted without installing a sensor to detect positional information of the marker of the operation disk part. <P>SOLUTION: The reproduction device 10 includes: a reproduction part 14 to reproduce data recorded on a recording medium; an RAM 16 to store data reproduced with the reproduction part 14; an operation part 24 including the operation disk part for controlling speed and order of reading data from the RAM 16, to accept an operation input related to reading of data from the RAM 16; and a control part 12 to control reading of data from the RAM 16 based on the operation input accepted with the operation part 24. When the operation part 24 accepts a predetermined operation input, stops reproduction of the reproduction part 14, and performs processing according to the operation input, the control part 12 sets the data readout position on the RAM 16 corresponding to the amount of rotation of the operation disk part during the processing. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a playback apparatus and a playback method that can change the reading speed and reading order of audio data stored in a memory by operating an operation disk unit.

  A disc jockey (Disc Jockey) that can change the reading speed and reading order of audio data read from a recording medium such as a compact disc (CD) to a memory by operating the operation disk (jog dial). Hereinafter, a reproducing apparatus used by DJ, etc.)) is known.

  DJ and the like may perform special reproduction called scratch reproduction that generates sound effects such as rubbing sound during reproduction using such a reproduction apparatus. A DJ or the like generates a rubbing sound by quickly turning the operation disk portion in the forward direction or the reverse direction like an analog record in the same manner as in the case of reproducing an analog record with an analog record player.

  Since the analog record is configured to output an audio signal by the vibration of the record needle that is in contact with the groove formed on the surface, the audio signal that is output depending on the position at which the groove of the analog record contacts the record needle Can be specified. A DJ or the like may affix a mark such as a sticker on the surface of the analog record where no groove is formed so that the position where a desired audio signal is output can be recognized when scratch playback is performed. is there.

  For example, when scratch playback is performed with an analog record player, a DJ or the like first brings a record needle into contact with a groove before a position at which analog record scratch playback is performed, and starts playback of the analog record. Next, when the position for scratch reproduction approaches, the DJ or the like gazes at the rotating mark while preparing the hand near the analog record. Then, scratch reproduction is started at the timing when the mark position of the analog record coincides with the position of the record hand. In this way, a DJ or the like can easily perform scratch reproduction from a desired position.

  Some so-called digital playback devices include a mark serving as an index of a position for performing scratch playback on the upper surface of the operation disk portion, and scratch playback can be started with good timing based on the mark. According to this playback apparatus, scratch playback similar to the operation in the above-described analog record player is possible.

  In this reproducing apparatus, the position information (angle with respect to the reference angle) of the mark of the operation disk part is acquired by the sensor. According to the acquired position information, the operation disk part is rotated to adjust the position of the mark, or the operation disk part is rotated and shifted from the data read timing, and the read position caused by operations such as scratching, jumping, etc. Adjust the position of the mark on the operation disk.

JP 2005-276281 A JP-A-2005-293666 JP 2006-99819 A

  In the reproducing apparatus, a dedicated sensor for acquiring the position information of the mark of the operation disk part is necessary. However, providing such a sensor is not only a limiting factor in designing the apparatus, but also increases the manufacturing cost.

  In view of the above circumstances, the present invention provides a playback device in which the positional relationship between the data reading position and the mark attached to the operation disk part is adjusted without providing a sensor for detecting the position information of the mark on the operation disk part. An object is to provide a reproduction method.

A reproducing apparatus according to a first aspect of the present invention includes a reproducing unit that reproduces data recorded on a recording medium, a storage unit that stores data reproduced by the reproducing unit, and a disk that rotates at a predetermined rotation speed. And an operation disk unit that is arranged above the disk unit and rotates following the rotation of the disk unit, and controls the speed and order of reading data from the storage unit, and the operation disk unit. An operation unit that receives an operation input related to reading of data from the storage unit, and a control unit that controls reading of data from the storage unit based on the operation input received by the operation unit. When the operation unit accepts an input and stops the reproduction of the reproduction unit and performs processing according to the operation input, the control unit stops reproduction of the reproduction unit, and sends the input to the storage unit Detecting the amount of rotation of the operation disk portion from the start of storing a predetermined amount of data corresponding to the processing according to the operation input to the completion of the data storage, after the processing according to the operation input A position obtained by adding a time amount corresponding to the rotation amount to the reproduction start position is set as a data reading position from the storage unit, and data reproduction is started.

The reproducing method according to the second aspect of the present invention includes a step of reproducing data recorded on a recording medium, a step of storing the reproduced data, and a disk portion that is disposed above a disk portion that rotates at a predetermined rotational speed. An operation that rotates following the rotation of the disk part A step for controlling the speed and order of reading data stored by the rotation operation of the disk part, a step for receiving an operation for controlling the reading of stored data, and a predetermined operation input When the received data reproduction is stopped and the process corresponding to the operation input is performed, the data reproduction is stopped and the storage of a predetermined amount of data corresponding to the process corresponding to the operation input is started. A position obtained by detecting the amount of rotation of the operation disk until the storage is completed, and adding a time amount corresponding to the amount of rotation to the reproduction start position after processing according to the operation input A step of setting the read position of the memory data starts reproducing the data, a method comprising a.

According to the reproducing apparatus of the present invention , it is possible to adjust the positional relationship between the data read position and the mark of the operation disk part without providing a sensor for detecting the position information of the mark of the operation disk part. Further, according to the reproduction method of the present invention, it is possible to adjust the relationship between the data read position and the position of the rotation operation without detecting the position information that serves as a mark of the operation disk portion.

FIG. 1 is a block diagram of a playback apparatus according to an embodiment of the present invention. FIG. 2 is a side sectional view of the jog dial portion according to the embodiment of the present invention. FIG. 3A is a view showing the relationship between the operation disk portion and the second optical sensor portion, and FIG. 3B is a partially enlarged view thereof. 4A to 4D are diagrams illustrating the relationship between the position of the mark on the rotation operation unit and the reading position during the jump operation. FIG. 5 is a diagram showing a processing flow at the time of a jump operation in the present embodiment.

Embodiments according to the present invention will be described below in detail with reference to the drawings. In addition, embodiment shown below is an example and is not limited to this.
The playback apparatus according to the present embodiment allows an operator such as a DJ to freely play back digital audio data recorded on a recording medium such as a CD by the same operation as when operating an analog record. For example, it can be suitably used in clubs, studios, and the like.

  FIG. 1 shows the configuration of a playback apparatus 10 according to an embodiment of the present invention. A playback device 10 shown in FIG. 1 includes a control unit 12, a playback unit 14, a RAM (Random Access Memory) 16, a memory control unit 17, a signal processing unit 18, a DAC (Digital to Analog Converter) 20, and a display. The unit 22 and the operation unit 24 are provided.

  The control unit 12 controls the overall operation of the playback apparatus 10 according to the present embodiment described below.

  The playback unit 14 includes a drive for reading a recording medium, and reads and plays back digital data recorded on a recording medium such as a CD. The playback unit 14 may read the digital data from an external memory in which the digital data is stored, for example, an external hard disk, a flash memory, or the like.

  The signal processing unit 18 demodulates 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 audio data to the memory control unit 12.

  The RAM 16 stores the digital audio signal input to the audio signal processing unit 18.

  The memory control unit 17 manages the memory address of the RAM 16. Further, the memory control unit 17 reads the audio data stored in the RAM 16 in the address order and speed designated by the control unit 12.

  The DAC 20 converts the digital audio signal read from the RAM 16 by the memory control unit 17 into an analog audio signal. The analog audio signal output from the DAC 20 is output to a device such as a speaker via the audio output terminal 21. An amplifier may be provided between the DAC 20 and the audio output terminal 21 to output an amplified analog audio signal. Further, in the case of outputting as a digital signal, the DAC 20 is not used, but it may be converted into a predetermined digital interface format and output.

  The display unit 22 includes a liquid crystal display device or the like. The display unit 22 displays information such as the currently played track, file playback time (minutes, seconds, frames), operation contents, and the like, but the display contents are not limited to these.

  The operation unit 24 includes a jog dial unit, a playback button, a playback stop button, an eject button, and the like (none of which are shown in FIG. 1), which will be described later, and receives an instruction input through an operation of the operator.

  FIG. 2 shows a side cross section of the jog dial portion 30 according to the present embodiment. The jog dial part 30 shown in FIG. 2 includes an operation disk part 32, a disk part 34, a sheet part 36, a first light sensor part 38, and a second light sensor part 40.

The operation disk portion 32 is disposed above the panel 31 that constitutes the upper surface of the main body of the playback device 10. The operation disk part 32 is comprised from the annular member which has the outer diameter of 10 cm-30 cm of the magnitude | size equivalent to an analog record, for example. The width of the operation disk portion 32 is set to a size that gives sufficient operability to the operator. The operation disk portion 32 is made of a metal material or a plastic material that provides preferable operability for the operator.
On the outer peripheral portion of the operation disk portion 32, slit portions 33 each having a plurality of circular or rectangular openings are provided at equal intervals.

  The disk part 34 is configured by a disk-like member having a diameter substantially the same as or smaller than the outer diameter of the operation disk part 32 and disposed concentrically below the operation disk part 32. The disk portion 34 is made of, for example, polycarbonate.

  A sheet portion 36 is provided between the disk portion 34 and the operation disk portion 32, and a rotating shaft 37 passes through the approximate center thereof. The inner diameter of the sheet portion 36 is substantially equal to the inner diameter of the operation disk portion 32. The sheet portion 36 is made of plastic or plastic fiber that has a small friction coefficient and is less likely to generate static electricity.

  On the lower surface of the disk part 34, an anchor part 39 is provided substantially vertically. The anchor part 39 is, for example, a ring-shaped plate made of the same material as the disk part 34 and provided with a plurality of circular or rectangular openings at equal intervals.

  The first optical sensor unit 38 includes an optical sensor, and is fixed to the panel 31 at a position where the opening of the anchor unit 39 can be detected. The first optical sensor unit 38 detects the opening of the anchor unit 39 of the disk unit 34, generates a signal corresponding to the rotation state of the disk unit 34, and outputs the signal to the control unit 12. The control unit 12 determines the rotation state of the disk unit 34 based on the signal input from the first optical sensor unit 38 and controls a motor (not shown) so as to keep the rotation speed of the disk unit 34 at a constant speed. The method of detecting the rotation state by the first optical sensor unit 38 is the same as that of the second optical sensor unit 40 described later, and will be described in detail below.

  The disk portion 34 is rotationally driven at a predetermined speed by a motor (not shown), and is rotated, for example, at 33 + 1/3 RPM (rotational speed per minute) or 45 RPM which is substantially the same as the rotational speed of an analog disc player. The rotation direction is preferably the same as the rotation direction (clockwise) of the turntable of the analog record player. In this case, the operator can obtain the same operation feeling as the operation of performing special reproduction using the analog record.

  The operation disk portion 32 follows the rotation of the disk portion 34 and rotates about the rotation shaft 37. Here, the operation disk part 32 can rotate at substantially the same speed as the disk part 34. That is, the operation disk part 32 has a surface area sufficient to follow the rotation of the disk part 34, and by adjusting the material and thickness, even if the intervening sheet part 36 has a small friction coefficient, The weight and the moment of inertia are designed to be sufficiently small so that the rotation starts at the same rotational speed.

  The second optical sensor unit 40 is fixed to the panel 31 at a position in the vicinity of the outer periphery of the operation disk unit 32 where the opening of the slit unit 33 can be detected. For example, the second photosensor unit 40 is attached to a portion protruding from the upper surface of the panel 31.

FIG. 3A shows a top view of the operation disk portion 32, and FIG. 3B shows an enlarged view of a portion within a dotted circle in FIG. 3A.
As shown in FIG. 3A, a plurality of openings constituting the slit portion 33 are provided in a strip shape at substantially equal intervals in the vicinity of the outer peripheral edge of the upper surface of the operation disk portion 32. When the material of the operation disk part 32 is a metal, the slit part 33 is formed as a substantially rectangular opening. The shape of the opening may be an appropriate shape. When the material of the operation disk part 32 is a transparent or translucent plastic, the slit part 33 may be formed by printing.

The 2nd optical sensor part 40 is provided with the two optical sensors 41, as shown in FIG.3 (b). The optical sensor 41 includes a pair of light emitting elements and light receiving elements (both not shown). The light emitting element of the optical sensor 41 projects a light beam having a constant intensity from one surface of the operation disk portion 32, and the light receiving element is provided on the other surface to receive the transmitted light. The light receiving element is composed of a photoelectric conversion element, and generates a pulse signal according to the light receiving state.
In addition, when the slit part 33 is formed by printing, if the printing paint contains carbon, the accuracy with which the second photosensor part 40 detects the slit part 33 can be improved.

The control unit 12 determines the rotation state (rotation speed and rotation direction) of the operation disk unit 32 based on the pulse signal generated by the optical sensor of the second optical sensor unit 40.
When the rotation speed of the operation disk part 32 changes, the number of pulses of the pulse signal generated by the second optical sensor part 40 in a certain period changes according to the rotation speed of the operation disk part 32. The control unit 12 determines the rotational speed of the operation disk unit 32 from the number of pulses input from the second optical sensor unit 40 during a certain period. The rotational speed of the operation disk part 32 may be determined from the pulse width.

  Further, when the rotation direction of the operation disk part 32 changes, the phase difference between the pulse signals emitted from the two optical sensors 41 of the second optical sensor part 40 changes according to the rotation direction of the operation disk part 32. The control unit 12 determines the rotation direction of the operation disk unit 32 from the phase difference between the pulse signals input from the two optical sensors 41.

  One photosensor 41 of the second photosensor unit 40 advances in the positive direction with respect to the other photosensor 41 by, for example, a 1/4 pitch (m pitch + 1/4 pitch, m is a natural number). It is arranged to shift to the position. Therefore, when the operation disk portion 32 rotates in the forward direction, the output signal of the optical sensor 41 has a phase difference of + 90 ° with respect to the output signal of the optical sensor 41. Further, when the operation disk portion 32 rotates in the reverse direction, the output signal of the optical sensor 41 has a phase difference of −90 ° with respect to the output signal of the optical sensor 41, so that the phase difference of the optical sensor 41 is detected. By doing so, the rotation direction of the operation disk part 32 can be detected.

  The control unit 12 determines the reading speed and reading order for reading audio data stored in the RAM 16 according to the pulse signal input from the second optical sensor unit 40, and controls the memory control unit 17. When a playback start instruction is input from the operation unit 24, the memory control unit 17 controls to read the audio data stored in the RAM 16 in response to the input.

  Furthermore, in the present embodiment, the control unit 12 can determine the amount of rotation of the operation disk unit 32 during the specific period by counting the number of pulse signals generated by the second optical sensor unit 40 within the specific period. . For example, the control unit 12 counts up during the same rotation as the reference rotation direction, counts down during the reverse rotation, and rotates 360 ° when obtaining a pulse count corresponding to the number of slits for one round of the operation disk unit 32. Determine. For example, the control unit 12 resets the count every round and holds it as a rotation amount corresponding to 0 ° to 360 °.

  The control unit 12 calculates a time shift amount Δt corresponding to an angle difference (rotation amount) Δr from the reference position of the operation disk unit 32. Based on the obtained time shift amount Δt, the control unit 12 performs control to make the rotation position of the operation disk unit 32 generated at the time of jumping coincide with the audio data read position of the RAM 16.

  FIGS. 4A to 4D are diagrams showing a state in which the operation disk portion 32 rotates when a jump operation is performed from normal reproduction in the reproduction apparatus 10 according to the present embodiment. In the example shown in the figure, it is assumed that the operation disk part 32 rotates at a speed of 60 revolutions per minute (60 RPM), that is, one revolution per second.

  FIG. 4A shows a state when the reproduction of audio data is started. For example, the user pastes the mark M at a position that the user likes in the playback stopped state. The user turns the operation disk portion 32 so that the mark M is at a desired position, starts the song, and starts reproduction. The control unit 12 sets the position of the operation disk unit 32 at the start of reproduction to the reference position (0 °). In the example shown in FIGS. 4A to 4D, the location closest to the user's hand is the reference position.

  FIG. 4B shows a state one second after the start of reproduction. Since the operation disk portion 32 rotates once per second, the mark M is located at the reference position (0 °) one second after the start of reproduction.

  FIG. 4C shows a state in which the user subsequently presses the jump button to jump forward by 10 seconds. In this example, the jump interval is based on an integral multiple of the time for which the disk portion makes one revolution. FIG. 5 shows a flow example of adjustment processing of the read position at the time of jump.

When a jump instruction is input from the operation unit 24, the control unit 12 stops reproduction and reads a predetermined amount of audio data before and after the reproduction time of the jump destination. The control part 12 starts the pulse count of the 2nd optical sensor part 40 from the time of stopping reproduction | regeneration (FIG. 5, step S11).
At this time, the control unit 12 stores the current reading position (such as a time code indicating the reproduction time) (step S12).

  In the example shown in FIG. 4C, the playback time of the jump destination is 0.5 seconds before and 11 seconds after the start of playback, and 1 second after, for example, 10.5 seconds to 12 seconds. Audio data is read and stored in the RAM 16. Here, “reproduction time” is, for example, the reproduction time of an audio track.

  Note that the amount of data read to the RAM 16 may be at least as long as the time for one rotation of the operation disk unit 32. If the amount stored in the RAM 16 is too large, the sound is interrupted for a long time and the operability deteriorates.

It takes time to read audio data to the RAM 16. The operation disk unit 32 continues to rotate during the reproduction stop period, but the control unit 12 counts the number of pulses of the second photosensor unit 40 during the period from the reproduction stop to the completion of reading (FIG. 5, step S13). ).
The control unit 12 obtains the rotation amount of the operation disk unit 32 during the period from the count number (step S14). In the example shown in FIG. 4C, it is assumed that the angle difference Δr between the mark M and the reference position is 90 ° due to the rotation of the operation disk portion 32 during the reproduction stop period.

  The control unit 12 calculates a time shift amount Δt from the angle difference Δr (step S15). The control unit 12 adds the obtained time shift amount Δt to the jump destination playback time, sets the read start position, and starts playback from that time (step S16). Thus, the read position of the RAM 16 is adjusted according to the rotation of the operation disk portion 32 during the reproduction stop period, and the mark M of the operation disk portion 32 is maintained in the same rotation state before and after the jump. That is, before and after the jump, the mark M of the operation disk portion 32 is positioned at the reference position at the same timing.

  More specifically, the control unit 12 determines the read position of the audio data stored in the RAM 16 based on the rotation amount detected by the pulse count. When the rotation amount of the operation disk part 32 from the stop of reproduction to the completion of data reading is Δr (°) and the rotation number of the operation disk part 32 per second is R (1 rotation / second), the operation disk part 32 is Δr The time Δt (second) required for rotation can be expressed by Δt = (Δr / 360) · (1 / R).

In the example shown in FIG. 4C, since R = 1 (one rotation per second. 60 RPM), the time Δt required for the operation disk portion 32 to rotate 90 ° is 0.25 seconds.
For example, in the case of R = 0.75 (0.75 rotation per second. 45 RPM), Δt is 0.33 seconds.

  As described above, Δt corresponds to the amount of deviation of the read position that occurred during the jump operation. That is, compared with the mark position of the operation disk part 32 before the jump and the read position in the RAM 16, the time when reproduction is stopped for reading is between the mark position of the operation disk part 32 after the jump and the read position in the RAM 16. There is a misalignment. Δt corresponds to the amount of deviation of this time.

  Accordingly, if the time position obtained by adding Δt to the designated read position of the jump destination (time position represented by the time code) is set as the reproduction start position after the jump, this deviation is adjusted, and the operation disk unit 32 The mark position and the read position in the RAM 16 coincide before and after the jump.

  In the example shown in FIG. 4C, 11.25 seconds obtained by adding a time amount of 0.25 seconds corresponding to the rotation shift amount of 90 ° to the designated jump destination time position (11 seconds) is This is the read start position.

Since the operation disk portion 32 rotates once per second, that is, 360 ° every second, it takes 0.75 seconds to rotate the remaining 270 °. Therefore, as shown in FIG. 4D, the mark M coincides with the reference position when 0.75 seconds have passed (after 12 seconds from the start of reproduction), and the mark M is always reproduced after the jump. Positioned at the reference position at the same timing as the start.
That is, in this example, the initial target interval of the jump is based on an integral multiple of the time for which the disk portion makes one revolution, and the sound output position for the time is adjusted by adding a time amount corresponding to the amount of rotational deviation generated during the jump. Thus, after the jump, it is always located at the reference position at the same timing as the start of reproduction.

  The backward jump is processed in the same manner. In the case of a backward jump, the jump time is subtracted from the current playback time, and a time amount Δt calculated in the same manner may be added thereto.

  With the above configuration, for example, even after a DJ or the like has performed a jump operation from audio data recorded on a CD, the mark position of the operation disk portion 32 is maintained in the same rotational state as before the jump. The Thus, the DJ or the like can quickly reach the desired position using the jump without worrying about the timing of the reproduction position and the mark M being shifted.

  In the above embodiment, the description has been made in accordance with the operation at the time of the jump operation, but the present invention is not limited to this. For example, the present invention can also be applied to special reproduction operations such as scanning and seek operations that involve stopping reproduction and reading data to the RAM 16. That is, when the operation disk portion 32 rotates while the reproduction is stopped for reading data, and the rotation state of the mark M of the operation disk portion 32 changes between the start of reproduction and after the read operation. It can be adjusted by using the invention.

  In the above embodiment, an apparatus for processing audio data has been described. However, the present invention is not limited to this, and the present invention can be applied to an apparatus for processing a video signal.

  The present invention can be usefully used for a so-called DJ reproducing apparatus.

DESCRIPTION OF SYMBOLS 10 Playback apparatus 12 Control part 14 Playback part 16 RAM
17 Memory control unit 18 Signal processing unit 20 DAC
22 Display part 24 Operation part 32 Operation disk part 33 Slit part 40 2nd optical sensor part M Mark

Claims (2)

A reproducing unit that reproduces data recorded on a recording medium; a storage unit that stores data reproduced by the reproducing unit; a disk unit that rotates at a predetermined rotation speed; and the disk unit that is disposed above the disk unit. with rotated to follow the rotation of the disk portion, and the operation disk unit for controlling the operation of the speed and order reading data from the storage unit, the operation relating to the reading of data from the operation discal unit before term memory unit comprises An operation unit that accepts an input; and a control unit that controls reading of data from the storage unit based on the operation input accepted by the operation unit, wherein the operation unit accepts a predetermined operation input. when to stop playback performs processing corresponding to the operation input, the control unit stops the reproduction of the reproduction unit, previously defined with respect to the processing corresponding to the operation input to the front term memory unit Detecting the amount of rotation of the operation disk unit from the start of the storage amount of data to be stored in the data is completed, the amount of time corresponding to the rotation amount to the playback start position after processing corresponding to the operation input set the read position of the data from the storage unit the position obtained by adding a to start the reproduction of the data, reproducing apparatus, characterized in that. A step of reproducing the data recorded on the recording medium; a step of storing the reproduced data; and an operation disk disposed above the disk part rotating at a predetermined rotation speed and rotating following the rotation of the disk part. a step that control the rate and order reads the data stored by the rotational operation of the parts, the steps of receiving an operation for controlling reading of the stored data, stop the data reproduction accepting a predetermined operation input to the operation input when performing the response process, data to stop playback, the operation operation disk unit in response to processing corresponding to the input from the start of the storage of data of a predetermined amount until the storage of the data is completed rotation amount is detected and sets the position obtained by adding the amount of time corresponding to the rotation amount to the playback start position after processing corresponding to the operation input to the reading position of data stored Day Reproducing method for the step of starting the reproduction, comprising the.

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