JP2006331565A - Information reproducing device, and reproducing method of information reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information reproducing device for enabling a user to quietly enjoy audio and video when reproducing AV data by determining AV data reproduction and data reproduction as an external storage device of a PC, controlling the rotating speed of an optical disk and suppressing wind noise of the optical disk and vibrations due to the rotation, and a reproducing method of the information reproducing device. <P>SOLUTION: The information reproducing device comprises a rotating means for rotating the optical disk 11 at a plurality of rotating speeds, a means for reading information of the optical disk 11, a buffer memory 19 for temporarily storing pre-fetch information, and a means for measuring buffer memory pre-fetch processing time, determines the pre-fetch processing time and a threshold, and lowers the rotating speed of the optical disk 11 when the pre-fetch processing time is below the threshold. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a data disc used as an external storage device such as a computer, a disc information reproducing device for reproducing data recorded for music and video reproduction (hereinafter referred to as AV data), and a reproducing method of the information reproducing device. .

  2. Description of the Related Art In recent years, information reading apparatuses that read information from a hard disk (HDD), a rotationally driven disk medium such as a CD, a CD-R, a CD-RW, a DVD, a DVD-R, and a DVD-RAM have a high reading speed. However, especially when reproducing data such as audio data and video data, if the disk is rotated at high speed and the data is read out, wind noise due to high speed rotation, noise and consumption due to vibration at high speed rotation, etc. It may become a problem when you enjoy the quietness of audio and video because the power becomes large. On the other hand, as an external storage device of a host computer, it is desirable to read data recorded on a disk medium or the like at high speed.

  There is (Patent Document 1) as a document in this field.

  Further, the disk device has a buffer memory for temporarily storing disk information, and temporarily stores the read disk information in the buffer memory until it is output to an external device such as a host computer. This temporary storage is hereinafter referred to as prefetching, and the temporary storage information is referred to as prefetching information.

When reading data from the host computer as an external storage device such as ripping, the reading speed of the information on the disk to the buffer memory is from the buffer memory to the host computer, except in special cases where the load on the host computer is heavy. The buffer memory for temporary storage does not become full because it is slower than the read speed of the video data. However, when AV data such as audio data and video data is played back, the read speed of the host computer becomes slow due to the bit rate. Frequently, the buffer memory for storage becomes full. There is (Patent Document 2) as a document that detects the remaining amount of the buffer memory for temporary storage and controls the rotation speed in accordance with the detected change amount.
JP 2002-367276 A JP 2003-281815 A

  However, in the method according to (Patent Document 1), it is determined whether the DVD is a VIDEO or a DVD-ROM, and the rotation of the DVD playback mode is controlled. The disc can be discriminated whether it is a DVD-VIDEO disc, and rotation control is possible based on the discriminating information, but it was created on a personally created video file, such as a CD-R, which does not depend on the DVD directory structure. It is not possible to distinguish between AVI files and MOV files.

  In addition, even in the rotation control in the discrimination based on the CSS authentication information of DVD-VIDEO, the personally created DVD-VIDEO file usually has no CSS authentication information, and thus the rotation speed cannot be controlled by this method.

  In (Patent Document 2), the remaining amount of data stored in the buffer memory is detected, the rate of change of the amount of storage is calculated, and the rotation speed of the spindle motor is controlled. This corresponds to the change in the buffer memory accompanying the above.

  In the present invention, reproduction of AV data such as audio data and video data and transfer of data as an external storage device such as a host computer are determined to control the rotation speed of the disk, and to control wind noise and rotation of the disk. An object of the present invention is to provide an information reproducing apparatus that can suppress the vibration associated with the reproduction of AV data and quietly enjoy the reproduction of audio and video.

  In order to solve such problems, a rotating means for rotating a disk, a means for reading recorded information on the disk, a buffer memory for temporarily storing information until the read information is output to the outside, and the buffer memory Means for measuring a temporarily stored information processing time required to acquire the temporarily stored information, and controlling a rotational speed of the disc based on the temporarily stored information processing time In this case, the rotational speed of the disk can be changed according to the read-ahead processing time for the buffer memory of the CPU, and a state in which the transfer rate with the external device is slow and the buffer memory is likely to become full is detected. When playing back data, you can enjoy audio and video quietly.

  According to the information reproducing apparatus of the present invention, a data disk as an external storage device such as a host computer reproduces at a high speed mode rotation speed, and in reproducing AV data such as music and video data. The information on the disc can be reproduced with less noise and less vibration.

  According to the first aspect of the present invention, there is provided a rotating means for rotating a disk, a means for reading recorded information on the disk, a buffer memory for temporarily storing information until the read information is output to the outside, and a temporary storage in the buffer memory. Means for measuring temporarily stored information processing time required to acquire information, and controlling the rotational speed of the disk based on the temporarily stored information processing time, comprising: a CPU; In the playback of AV data, etc., the disk rotation speed can be changed according to the pre-read processing time for the buffer memory, the transfer rate with the external device is slow and the buffer memory is likely to become full. You will be able to enjoy audio and video quietly.

  According to a second aspect of the present invention, there is provided the information reproducing apparatus according to the first aspect, wherein the rotational speed of the disk is set to the low speed mode when the temporarily stored information processing time is less than the threshold value. In the data reproduction in which the transfer to the external device is slow and the buffer memory is frequently filled, it is possible to provide an information reproducing apparatus in which the rotation speed is reduced and the noise and power consumption are emphasized.

  The invention according to claim 3 is the information reproducing apparatus according to claim 2, wherein the temporarily stored information in the buffer memory is AV data, and the host is affected by the bit rate as in the case of AV data. Providing an information playback device that allows users to enjoy video and music by reducing the rotation speed and focusing on quiet sound when playing back data that is slow to be transferred to an external device such as a computer and the buffer memory is often full. become able to.

  The invention according to claim 4 is characterized in that the rotation speed of the optical disk is set to the high speed mode when the temporary storage information processing time is equal to or greater than the threshold value or when the temporary storage processing to the buffer memory does not occur. In the information reproducing apparatus according to No. 1, in data reproduction such that data is transferred to an external device at high speed, the rotation speed of the optical disk can be set to a high speed mode, and the performance of data transfer can be improved.

  The invention according to claim 5 is the information reproducing apparatus according to claim 4, wherein the temporarily stored information in the buffer memory is a data disk of an external device, wherein the data is stored in an external storage device such as a host computer. In data reproduction such as transferring to an external device at high speed, the rotation speed of the optical disk can be set to a high speed mode, and the performance of data transfer can be improved.

  The invention according to claim 6 is a rotating means for rotating the disk, a means for reading the recorded information on the disk, a buffer memory for temporarily storing the read information until the read information is output to the outside, Means for measuring temporary storage information processing time required to acquire temporary storage information, wherein the information storage device measures temporary storage information processing time within a predetermined period during disk playback, and temporarily stores information An information reproducing apparatus for determining a processing time and a threshold value, and lowering a rotational speed of the disk when a temporarily stored information processing time is less than the threshold value. Measure the read-ahead information processing time, determine the read-ahead information processing time and threshold, and if the read-ahead information processing time falls below the threshold, the disk rotation speed Is an information playback device characterized by lowering the noise, especially in the playback of AV data, etc., to reduce wind noise due to high-speed rotation of the optical disc, noise and power consumption due to vibration, and enjoy video and music quietly become able to.

  The invention described in claim 7 includes a rotating means for rotating the disk, a means for reading the recorded information on the disk, and a buffer memory for temporarily storing the temporarily stored information in the buffer memory until the read information is output to the outside. Means for measuring temporarily stored information processing time required to acquire temporarily stored information in the buffer memory, and measuring the temporarily stored information processing time within a predetermined period during disk playback An information reproducing apparatus characterized by determining a temporary storage information processing time and a threshold value, and increasing the rotational speed of the disc when the temporary storage information processing time is equal to or greater than the threshold value. When the prefetch information processing time to the buffer memory is measured, the prefetch information processing time and the threshold are determined, and the prefetch information processing time is equal to or greater than the threshold An information reproducing apparatus characterized by increasing the rotational speed of the disk, in the data reproduction as an external storage device of the transfer rate with an external device is high PC, so that it is processed at high speed.

  According to the eighth aspect of the present invention, the read information is temporarily stored in the buffer memory and the temporarily stored information in the buffer memory is acquired until the recorded information on the disk is read and the read information is output to the outside. A method for reproducing information stored in an information reproducing apparatus for measuring a temporarily stored information processing time required to perform a temporary storage in a buffer memory by measuring a temporarily stored information processing time in a buffer memory within a predetermined period during disk reproduction. A reproduction method for an information reproducing apparatus, characterized by determining an information processing time and a threshold value, and lowering a disk rotation speed when an information processing time temporarily stored in a buffer memory falls below the threshold value. Measures the prefetch information processing time to the buffer memory within the period, determines the prefetch information processing time and threshold, and performs prefetch information processing Is a reproducing method of an information reproducing apparatus characterized by lowering the rotational speed of the disc when the value is below a threshold value. According to this reproducing method, particularly in reproducing AV data, wind noise caused by high-speed rotation of the optical disc, Noise and power consumption due to vibration can be reduced.

  According to the ninth aspect of the present invention, the read information is temporarily stored in the buffer memory and the temporarily stored information in the buffer memory is acquired until the recorded information on the disk is read and the read information is output to the outside. A method for reproducing information stored in an information reproducing apparatus for measuring a temporarily stored information processing time required to perform a temporary storage in a buffer memory by measuring a temporarily stored information processing time in a buffer memory within a predetermined period during disk reproduction. A playback method for an information playback apparatus, characterized in that information processing time and a threshold value are determined and the rotational speed of the disk is increased when the information processing time temporarily stored in the buffer memory is equal to or greater than the threshold value. The prefetch information processing time to the buffer memory within the period is measured, the prefetch information processing time and the threshold are determined, and the prefetch information processing time A reproduction method of an information reproducing apparatus characterized in that the rotational speed of a disc is increased when a threshold value is greater than or equal to a threshold value. In data reproduction as an external storage device of a PC having a high transfer rate with an external device, high-speed processing can be performed.

  Hereinafter, embodiments of the present invention will be described in detail.

  In the present invention, any information reproducing apparatus that reproduces information recorded on a rotating medium such as a magneto-optical disk, a hard disk, or an optical disk can be applied. In this embodiment, an optical disk apparatus will be described as an example. However, other configurations are not mentioned.

(Embodiment 1)
Hereinafter, Embodiment 1 of the present invention will be described in detail.

  FIG. 1 is a block diagram showing a configuration of an optical disc apparatus according to Embodiment 1 of the present invention.

  As shown in FIG. 1, the optical disc apparatus 1 includes a pick-up module 12, a spindle motor 13, a feed motor 14, a servo module 15, a signal control unit 16, a CPU 17, a main memory 18, a buffer memory 19, and an interface 110. Yes.

  Then, it is connected to the host computer 111 and outputs the data recorded on the optical disk 11 to the host computer 111.

  The pickup module 12 which is an optical pickup means has a laser light emitting element (not shown), and performs reproduction by irradiating a laser beam when reading data from the optical disk 11. The spindle motor 13 rotates the optical disc 11.

  A feed motor 14 that is an optical pickup moving means moves the optical pickup module 12 toward and away from the spindle motor 13. The servo module 15 is a rotational speed control means for controlling the movement control of the feed motor 14 and the rotational speed of the spindle motor 13. The interface 110 transmits and receives data signals with the host computer 111. The CPU 17 includes a main memory 18, and controls the servo module 15 and the interface 110 with the signal control unit 16 and the host computer 111 by a program (firmware) recorded in the main memory 18. The buffer memory 19 is a prefetch buffer memory that temporarily stores data on the optical disk 11. The CPU 17 also measures the prefetch information processing time required for acquiring the temporarily stored information in the prefetch buffer memory.

  In the conventional reproduction of data on the optical disc 11, when reading data such as ripping, the read speed from the optical disc 11 is slower than the read speed from the host computer 111, so the prefetch buffer memory 19 does not become full. . On the other hand, in the reproduction of AV data or the like, the read speed from the host computer 111 is slow due to the bit rate of the AV data, and the prefetch buffer memory 19 is frequently filled. The optical disc apparatus temporarily shifts to the pause process when the prefetch buffer memory 19 is full, and starts prefetching when the buffer is empty. , A wind noise, a rotation sound of the spindle motor 13 and the like were generated. In the present invention, paying attention to this series of operations, prefetch processing measurement is performed within a fixed period, and when the prefetch processing time falls below a threshold value, such as playback of AV data, the rotation speed is lowered and the low speed mode is set. In this way, wind noise caused by high-speed rotation, noise caused by vibration, and power consumption are reduced.

  In normal data reading such as ripping, the pre-read processing time is larger than the threshold value or the pre-read processing does not occur, so the read in the high-speed mode is performed.

  FIG. 2 is a diagram showing an example of read processing control according to Embodiment 1 of the present invention.

  In FIG. 2, when the data reading process is started (S201), a reproduction operation determination processing routine is executed (S202), and it is determined whether or not the reproduction operation is being performed (S203). It is determined whether or not (S204), a low speed mode which is a reproduction / reading speed is set (S205), data is read (S206), and data reading is terminated (S207).

  It is determined whether or not the reproduction operation is being determined (S203). If the ripping operation is not being performed, the data is read (S206), and the data reading is terminated (S207).

  FIG. 3 is a diagram showing a reproduction operation determination processing routine according to Embodiment 1 of the present invention.

  In FIG. 3, when the reproduction operation determination is started (S301), it is determined whether there is a prefetch processing request (S302). If there is a prefetch request, it is determined whether there is continuity of addresses (S303). If there is continuity, the prefetch processing time is acquired (S304), it is determined whether a certain time has elapsed (S305), and if the certain time has elapsed, it is determined whether the prefetching processing time is abnormal in the threshold (S306). If so, it is determined that the ripping operation is being performed (S307). If it is below the threshold, it is determined that the playback operation is in progress (S310), the prefetch processing time is initialized, the measurement time is initialized (S308), and the playback operation determination is terminated (S311).

  If there is no prefetching request in the judgment of the prefetching processing request (S302) or if there is no address continuity (S303), it is determined that the ripping operation is in progress, the prefetching processing time is initialized, and the measurement time is initialized (S309). Then, the reproduction operation determination is finished (S311). If the prefetch processing time is acquired and the predetermined time is not reached, the reproduction operation determination is finished.

(Embodiment 2)
The second embodiment of the present invention will be described in detail below. Note that in Embodiment 2, portions common to Embodiment 1 are not described repeatedly.

  FIG. 4 is a diagram showing an example of read processing control according to Embodiment 2 of the present invention.

  In FIG. 4, when a data read process request is started (S401), a reproduction operation determination process routine is executed (S402). This reproduction operation determination processing routine is the processing routine described in the first embodiment.

  Based on the determination result of the reproduction operation determination processing routine, it is determined whether or not the ripping operation is being performed (S403). If the ripping operation is being performed, it is determined whether or not the low-speed rotation is being performed (S404). Is read in the high-speed mode (S405), the data is read (S406), and the data reading is terminated (S407).

  If it is not ripping or if it is rotating at high speed, data is read (S406).

(Embodiment 3)
Hereinafter, Embodiment 3 of the present invention will be described in detail. Note that in Embodiment 3, portions common to Embodiment 1 or Embodiment 2 are not described repeatedly.

  FIG. 5 is a diagram showing an example of read processing control according to Embodiment 3 of the present invention.

  When the data read process is started (S501), a reproduction operation determination process routine is executed (S502). This reproduction operation determination processing routine is the processing routine described in the first embodiment. Next, it is determined whether or not it is operating at the playback speed (S503). If the playback operation is in progress, it is determined whether or not it is rotating at high speed (S504). Then, the data is read (S506), and the data reading is finished (S509).

  If it is determined whether or not the motor is rotating at high speed (S504), the data is read out if the motor is not rotating at high speed (S506).

  Further, it is determined whether or not the reproducing operation is being performed (S503). If the reproducing operation is not being performed, it is determined whether or not the low-speed rotation is being performed (S507), and if the low-speed rotation is being performed, the data reading speed is set (S508). S506). If it is not rotating at low speed, data is read (S506).

  INDUSTRIAL APPLICABILITY The present invention can be applied to a disk reproducing apparatus equipped with a disk apparatus that reads and reproduces information recorded on a disk, for example, a reproducing apparatus having a rotating recording medium such as an optical disk apparatus, a magneto-optical disk apparatus, and a hard disk apparatus. .

1 is a block diagram showing the configuration of an optical disc apparatus according to Embodiment 1 of the present invention. The figure which shows an example of the read-out process control which concerns on Embodiment 1 of this invention The figure which shows the reproduction | regeneration operation | movement determination processing routine which concerns on Embodiment 1 of this invention. The figure which shows an example of the read-out process control which concerns on Embodiment 2 of this invention. The figure which shows an example of the read-out process control which concerns on Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk apparatus 11 Optical disk 12 Pickup module 13 Spindle motor 14 Feed motor 15 Servo module 16 Signal control part 17 CPU
18 Main memory 19 Buffer memory 110 Interface 111 Host computer

Claims (9)

Rotating means for rotating the disk;
Means for reading the recording information of the disc;
A buffer memory for temporarily storing information until the read information is output to the outside;
Means for measuring a temporary storage information processing time required to acquire the temporary storage information in the buffer memory,
An information reproducing apparatus for controlling the rotational speed of the disk based on the temporarily stored information processing time. 2. The information reproducing apparatus according to claim 1, wherein when the temporarily stored information processing time is less than a threshold value, the rotational speed of the disk is set to a low speed mode. 3. The information reproducing apparatus according to claim 2, wherein the temporarily stored information in the buffer memory is AV data. 2. The information reproducing apparatus according to claim 1, wherein the rotation speed of the optical disk is set to a high-speed mode when the temporary storage information processing time is equal to or greater than a threshold value or when the temporary storage process to the buffer memory does not occur. . 5. The information reproducing apparatus according to claim 4, wherein the temporarily stored information in the buffer memory is a data disk of an external device. Rotating means for rotating the disk;
Means for reading the recording information of the disc;
A buffer memory for temporarily storing the read information until the read information is output to the outside;
Means for measuring temporarily stored information processing time required for acquiring temporarily stored information in the buffer memory,
Measuring the temporarily stored information processing time within a predetermined period in the reproduction of the disc;
An information reproducing apparatus characterized by determining the temporary storage information processing time and a threshold value, and lowering the rotational speed of the disc when the temporary storage information processing time is below the threshold value. Rotating means for rotating the disk;
Means for reading the recording information of the disc;
A buffer memory for temporarily storing information temporarily stored in the buffer memory until the read information is output to the outside;
Means for measuring a temporary storage information processing time required to acquire temporary storage information in the buffer memory,
Measuring the temporarily stored information processing time within a predetermined period in the reproduction of the disc;
An information reproducing apparatus characterized by determining the temporary storage information processing time and a threshold value, and increasing the rotational speed of the disc when the temporary storage information processing time is equal to or greater than the threshold value. Rotate the disc
Read the record information of the disc,
Until the read information is output to the outside, the read information is temporarily stored in the buffer memory,
A playback method of an information playback apparatus for measuring a temporary storage information processing time required to acquire temporarily stored information in the buffer memory,
Measure information processing time temporarily stored in the buffer memory within a predetermined period in the reproduction of the disk,
A playback method for an information playback apparatus, wherein a temporary storage information processing time in the buffer memory and a threshold value are determined, and the rotational speed of the disc is reduced when the temporary storage information processing time in the buffer memory falls below the threshold value. . Rotate the disc
Read the record information of the disc,
Until the read information is output to the outside, the read information is temporarily stored in a buffer memory,
A playback method of an information playback apparatus for measuring a temporary storage information processing time required to acquire temporarily stored information in the buffer memory,
Measure information processing time temporarily stored in the buffer memory within a predetermined period in the reproduction of the disk,
A playback method for an information playback apparatus, wherein a temporary storage information processing time in the buffer memory and a threshold value are determined, and the rotational speed of the disk is increased when the temporary storage information processing time in the buffer memory is equal to or greater than the threshold value. .

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