JP2005243119A - Reproducing device and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reproducing device and method for reproducing reproduction data recorded in a recording medium within a short period of time. <P>SOLUTION: An audio player 1 is provided with a disk 10 in which reproduction data such as music is recorded, an IC tag 20 attached to the surface of the disk 10 to store at least TOC information of the disk 10, a reading control section 40 for reading the TOC information stored in the IC tag 20, and a data reproducing section 30 for reading/reproducing the reproduction data of the disk 10 on the basis of the TOC information read by the reading control section 40. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a reproducing apparatus and a reproducing method for reproducing reproduction data recorded on a recording medium such as a CD or MD.

  When music data recorded on a CD, MD, or the like is reproduced, first, TOC (Table of Contents) information is read. The TOC information is a table of contents and a list showing the recording contents of a CD or the like, and records the number of recorded songs, performance time, track information, and the like. Character information may be recorded using an unused area of the TOC.

  In general, the TOC information is recorded on the innermost circumference of the disc, and when the CD is loaded on the player, the TOC information is automatically read and information such as the reproduction order and time of the music file is acquired. Based on this information, the optical pickup is quickly accessed to the target track, and the music data is read and reproduced.

  Patent Document 1 discloses a reading device in which barcodes indicating the type and reproduction order of disks are concentrically attached to the surface of a disk, and barcode information is read by a line sensor. When a plurality of discs are played back, the playback order recorded on the bar code is automatically read to enable continuous playback of the discs.

JP-A-5-324943

  However, the conventional reproducing apparatus has the following problems. When a disc such as a CD or MD is inserted in the playback device or when the disc is replaced, the TOC information recorded on the disc is read. Since the TOC information is read after the disc rotation is stabilized, the user must wait for the music to play for a certain period of time.

  Further, as shown in Patent Document 1, when information is acquired using a barcode attached to a disc, it is difficult to record all TOC information because the amount of data included in the barcode is limited. is there. Further, when a bar code is used, the position accuracy of the reading sensor is also required, resulting in an expensive reading device.

An object of the present invention is to solve the above-described conventional technique and to provide a reproducing apparatus and a reproducing method that can reproduce reproduction data recorded on a recording medium in a short time.
It is another object of the present invention to provide a reproducing apparatus and a reproducing method that are inexpensive and can easily read TOC information and the like.

  The reproducing apparatus according to the present invention is capable of reproducing a recording medium recorded with reproducing data in which at least information relating to the contents recorded on the recording medium is stored on the recording medium. Have means. Read control means for reading information relating to the contents stored in the electronic circuit for wireless communication, and reproduction means for reproducing the reproduction data recorded on the recording medium based on the information relating to the contents read by the read control means Have.

  Further, according to the present invention, there is provided a reproduction method of reproduction data recorded on a recording medium, wherein the information relating to the content is read by wireless communication from an electronic circuit for wireless communication storing information relating to the content recorded on the recording medium. And a second step of reading and reproducing the reproduction data recorded on the recording medium based on the information relating to the read contents.

  According to the reproducing apparatus of the present invention, a wireless communication electronic circuit for storing information relating to the content recorded on the recording medium is attached to the recording medium, and the reproduction data is reproduced by reading the information relating to the content from the wireless communication electronic circuit. Since it did in this way, compared with the conventional method, time required for reproduction | regeneration can be shortened.

  The playback apparatus according to the present invention is preferably implemented by an audio player that plays back a disk-shaped recording medium such as a CD or MD. Hereinafter, detailed embodiments will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of an audio player according to an embodiment of the present invention. The audio player 1 includes a disc 10 such as a CD or an MD, an IC tag 20 attached to the disc 10, a data reproducing unit 30 that reads audio data recorded on the disc 10 and reproduces it, and an IC tag 20. And a reading control unit 40 that reads the stored TOC information of the disk by wireless communication. In the conventional case, the TOC information is recorded on the disc. In this embodiment, the TOC information is stored in the IC tag 20 attached to the disc 10, and the TOC information read therefrom is supplied to the data reproducing unit 30. .

  The IC tag 20 is preferably fixed to the surface of the disk 10 using an adhesive or the like, as shown in FIG. The back surface of the disk 10 is a data reading surface, and if the IC tag 20 is attached to the back surface, reading will be hindered. For this reason, the IC tag 20 is attached to the surface. However, the IC tag 20 may be attached to the back surface as long as there is no trouble in reading.

  The IC tag 20 is a wireless tag and performs identification technology using wireless communication called RFID (Radio Frequency IDentification system). As shown in FIG. 3, the IC tag 20 includes an electronic circuit unit 22 and an antenna unit 24. The electronic circuit unit 22 preferably includes a readable / writable memory 26 and a control unit 28. The memory 26 stores TOC information necessary for reproducing the disc. The control unit 28 performs reading of TOC information from the memory 26 and control of signal transmission / reception based on a signal from a reading control unit 40 described later. The antenna unit 24 receives radio waves transmitted from the radio control unit 40 or transmits information read from the memory 26. Preferably, the IC tag 20 is a passive type that does not include a power source, and converts radio waves received by the antenna unit 24 into electrical energy.

  FIG. 4 shows the configuration of the reading control unit 40. The reading control unit 40 includes an RF module 42 for performing wireless communication with the IC tag 20 and a controller 44 that performs processing such as error check and decoding of the received signal. The RF module 42 transmits radio waves to the IC tag 20 located within a certain distance from the RF module 42 and reads the TOC information stored in the IC tag 20. The read TOC information is output from the controller 44 to the data reproducing unit 30.

  FIG. 5 shows the configuration of the data reproducing unit. The data reproducing unit 30 generates a TE (tracking error) signal or the like based on an optical pickup 31 that irradiates the recording surface of the disk with laser light and converts the reflected light into an electric signal, and a read signal from the optical pickup 31. A signal processing unit 32 that performs decoding processing necessary for audio output, a digital-audio converter (DAC) 33 that converts a digital audio signal from the signal processing unit 32 into an analog audio signal, and a speaker 34 that performs audio output The optical pickup 31 includes a driving unit 35 that servo-drives, and a central processing unit 36 that controls the driving unit 35 and the like based on a TE signal from the signal processing unit 32. The central processing unit 36 is supplied with the TOC information read by the reading control unit 40.

  Next, the disk reproducing operation in this embodiment will be described with reference to the flowchart of FIG. A disc to be reproduced is placed at a desired position such as a turntable (step S101). When the disk is placed on the turntable, the presence or absence of the disk may be determined by a sensor, and this may be transmitted to the reading control unit 40. The disk 10 does not necessarily have to be at a predetermined position such as a turntable, and may be at a distance that allows wireless communication from the reading control unit 40. Further, since radio waves are transmissive, the disk 10 may be housed inside a housing or the like.

  Next, radio waves are transmitted from the RF module 42 of the reading control unit 40 to the IC tag 20 and received by the antenna unit 24 of the IC tag 20. The radio wave is converted into electrical energy, and the control unit 28 reads out the TOC information stored in the memory 26 using this energy and transmits it from the antenna unit 24 (step S102).

  The TOC information transmitted from the IC tag 20 is received by the RF module 42, and after checking for errors in the controller 44, the TOC information is supplied to the central processing unit 36 (step S103).

  Based on the TOC information, the central processing unit 36 recognizes the order of music pieces recorded on the disc 10, the reproduction time, and the like (step S104). Then, the central processing unit 36 controls the drive unit 35 based on the TOC information, quickly moves the optical pickup 31 to a desired target track, and reads and reproduces reproduction data (step S105).

  FIG. 7A shows the time required for reproduction of a conventional disk, and FIG. 7B shows the time required for reproduction of a disk with an IC tag according to this embodiment. In the conventional case, after the period t1 until the rotation of the disk is stabilized after the disk is inserted, the TOC information is read in the period t2, and then the music is reproduced. That is, the time T0 required for music reproduction is T0 = t1 + t2.

  On the other hand, in the case of the present embodiment, since the reading control unit 40 reads the TOC information of the IC tag 20 of the disk 10 by wireless communication, it is not necessary to read the TOC information after rotating the disk as in the prior art. Accordingly, music can be played immediately after the rotation stabilization waiting period t1 ends. The reading of the TOC information from the IC tag 20 can be performed in a short period t3 because it is wireless communication. As a result, the time T1 required for music reproduction according to the present embodiment is T1 = t1 + T3 (<T0), and the shortened time until reproduction is t2-t3 as compared with the conventional case.

  As described above, according to the present embodiment, when a disc is newly reproduced or a disc is exchanged, the waiting time until the reproduction is shortened, and music or the like can be reproduced quickly.

  In the above embodiment, the music data is reproduced as an example, but of course, other video data may be reproduced. Furthermore, in the above-described embodiment, an example in which the TOC information is read from the IC tag is shown. However, in addition to the TOC information, if there is information necessary for reproducing the disc in advance, it may be read.

  Furthermore, in the above embodiment, the TOC information is read from the IC tag with the disk fixed, but the TOC information may be read from the IC tag with the disk rotated.

  Further, in the above embodiment, the IC tag is a batteryless passive type, but may be a battery built-in type. The transmission method of the IC tag may use a low frequency signal or may be based on microwaves. In addition, the memory included in the electronic circuit unit may be a read-only memory, and can be read and written. It may be a simple memory. In the latter case, the reading control unit 40 can have a function of writing to the memory.

  Next, the reproducing operation of the disc according to the second embodiment of the present invention will be described. In the second embodiment, when there are a plurality of disks, the disk to be reproduced is identified. As shown in FIG. 8, the audio player 1 includes an input unit 37 that receives input from the user, a display 38, and an identification information storage unit 39 that stores identification information for each disc.

  As shown in FIG. 9, the identification information storage unit 39 stores the album name and artist name for the music information stored on the disc, and identification information (here, address information) for identifying the IC tag of the disc 10. I remember it.

  The reproduction operation of this embodiment will be described with reference to FIG. The central processing unit 36 displays the album name and artist name of each disc on the display 38 based on the data stored in the identification information storage unit 39 (step S201). The user selects a disc desired to be reproduced from the list displayed on the display 38 (step S202).

  The central processing unit 36 transmits the address information of the selected disk to the controller 44 of the reading control unit 40 (step S203). For example, when the disk # 2 is selected by the user, the address information “Ad2” corresponding to the disk # 2 is transmitted to the controller 44.

  The controller 44 transmits a signal including the address information “Ad2” to the IC tag 20 via the RF module 42 (step S204). Specific address information is assigned to the IC tag 20, and the control unit 28 of the IC tag 20 determines whether or not the assigned address information matches the received address information (step S205). If the address information matches, the IC tag 20 reads the TOC information stored in the memory 26 (step S206) and transmits it to the reading control unit 40 (step S207). The central processing unit 36 receives the TOC information from the reading control unit 40, and plays back music after mounting the corresponding disc (step S208). On the other hand, when the address information does not match, the IC tag 20 does not operate. Therefore, the TOC information is not transmitted from the IC tag 20 to the reading control unit 40 (step S209).

  By performing disc identification in this way, even if a plurality of discs are arranged in the communicable area of the read control unit 40, it is possible to erroneously read TOC information other than the disc to be reproduced. Absent.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims. Deformation / change is possible.

The playback device and the playback method according to the present invention are used in an electronic apparatus that performs a playback function of playback data recorded on a recording medium such as a CD, MD, or DVD.
It can be widely used in audio / video (AV) equipment having a playback function, digital home appliances, car audio / video systems, navigation systems, and the like.

It is a block diagram which shows the structure of the audio system which concerns on the Example of this invention. 2A is a perspective view showing the mounting position of the IC tag, and FIG. 2B is a sectional view taken along the line XX. It is a figure which shows the internal structure of an IC tag. It is a block diagram which shows the internal structure of a reading control part. It is a block diagram which shows the internal structure of the data reproducing part which concerns on a 1st Example. 6 is a flowchart for explaining a disc reproducing operation in the first embodiment. It is a figure explaining the time which reproduction | regeneration requires. It is a block diagram which shows the internal structure of the data reproduction part which concerns on a 2nd Example. It is a table storing disc identification information. It is a flowchart explaining the reproduction | regeneration operation | movement of the disc based on a 2nd Example.

Explanation of symbols

1: Audio system 10: Disc 20: IC tag 22: Electronic circuit unit 24: Antenna unit 26: Memory 28: Control unit 30: Data reproduction unit 31: Optical pickup 32: Signal processing unit 33: DAC 34: Speaker 35: Drive Unit 36: Central processing unit 40: Reading control unit 42: RF module 44: Controller

Claims (9)

In a reproducing apparatus capable of reproducing a recording medium in which reproduction data recorded with a wireless communication electronic circuit for storing information on at least information recorded on the recording medium is attached to the recording medium,
Reading control means for reading information about the contents stored in the electronic circuit for wireless communication;
Reproduction means for reproducing the reproduction data recorded on the recording medium based on information about the contents read by the reading control means;
A reproducing apparatus. The reproducing apparatus according to claim 1, wherein the reading control means includes identification means for identifying the electronic circuit for wireless communication. The reproducing apparatus according to claim 1, wherein the electronic circuit for wireless communication includes a memory for storing information related to contents. The reproducing apparatus according to claim 1, wherein the electronic circuit for wireless communication is attached to a surface of the recording medium. The reproduction means includes an optical pickup that optically reads reproduction data from a rotating recording medium, and a drive unit that drives the optical pickup. The drive unit is optical based on information about the contents read by the read control means. The playback apparatus according to claim 1, wherein the pickup is driven. A reproduction method of reproduction data recorded on a recording medium,
A first step of reading information related to the content by wireless communication from an electronic circuit for wireless communication storing information related to the content recorded on the recording medium;
A second step of reading and reproducing the reproduction data recorded on the recording medium based on the information relating to the read content;
A reproduction method comprising: The reproduction method according to claim 6, wherein the reading in the first step is performed before the recording medium is rotated. The reproduction method according to claim 6, wherein the second step reads reproduction data after a rotation stabilization waiting time of the recording medium. The reproducing method according to claim 6, wherein the electronic circuit for wireless communication uses RFID technology, and the circuit stores TOC information of a recording medium.

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